Reasons of overheating of power motor for agricultural deep well pump
There are four reasons. First, the power source of the reasons: the voltage is too high or low, under a specific load, if the voltage range should be in the range of +10% to -5% of the rated value will cause the motor overheating; power three-phase voltage asymmetry, Phase-to-phase voltage interphase imbalance of more than 5%, will lead winding overheating; phase operation, experience shows that more than 85% of agricultural motor is burned due to lack of phase operation caused by motor phase protection device should be installed. Second, the reasons for deep-well pump: selection of power is not complete, small horse-drawn carts, motor overload operation for a long time, so that the motor temperature is too high; start too frequently, fixed or short-term intermittent work of the motor system for continuous work. Should limit the number of starts, the correct choice of thermal protection, according to the calibration of the motor using the quota. The stator windings are short-circuit, inter-turn short-circuit or local grounding, light when the local overheating of the motor, in severe cases when the insulation is not connected to the motor, Burnout; squirrel cage rotor broken or defective, the motor running 1 to 2 hours, the core temperature increased rapidly; ventilation system failure, should check whether the fan is damaged, the direction of rotation is correct, whether the ventilation duct blockage; Eccentric cleaning chamber so that the stator and rotor core phase wiping metal impact sound, the rapid increase in core temperature, a serious electric motor smoke, and even coil burned. Fourth, the working environment reasons: the motor winding damp or dust, oil, etc. attached to the winding, resulting in lower insulation. The insulation resistance of the motor should be measured and cleaned, dried; the ambient temperature is too high. When the ambient temperature exceeds 35 ℃, the inlet air temperature is high, the motor temperature is too high, should try to improve their working environment. Such as scaffolding shade.
Reminded: due to electrical causes of failure, should be requested to obtain professional qualification certificate of electrical maintenance, knowledgeable people can not blindly repair, to prevent the occurrence of personal injury accidents.
2017年1月23日星期一
Disassembly and Usage of Deep Well Pump Working
Disassembly and Usage of Deep Well Pump Working
Put part of the work flat on the board, first remove the filter pipe. Single-stage centrifugal pump, the upper and lower diversion shells to be imprinted each section marks, note the sequence number, to prevent the installation of the wrong. Remove the fixing screws between the two water pumps. From the above order down demolition. First remove the deflector shell, the demolition of the use of special tools or pipe clamp stuck, the shell screwed down (positive thread). Leakage of the impeller, impeller impeller cone sleeve washed down, remove the impeller and then conical cones opened with a screwdriver, the tapered sleeve removed.
In the above-mentioned method of a guided shell removed, dismantling to the lowest impeller temporarily not to remove the impeller, the lower deflector shell after unscrewing the impeller position in the shaft for a mark and then removed, So as not to affect the location of the entire installation of the shaft position and clearance adjustment.
In order to ensure the normal work of the drive shaft, shaft to extend its service life, should be noted in use:
1. It is strictly forbidden to start high-speed gears for automobiles.
2. Climb the clutch pedal.
3. It is strictly forbidden to overload the vehicle and speed up the vehicle.
4. The working condition of the drive shaft should always be checked.
5. Should always check the drive shaft hanger fastening, whether the damage to the bearing rubber, shaft connection parts are loose, whether the transmission shaft deformation.
6. In order to ensure the dynamic balance of the drive shaft, should always pay attention to whether the balance of solder-off. New drive shaft assembly is provided in the new drive shaft loading should pay attention to the extension of the assembly of the tag should ensure that the flange fork in a plane. In the maintenance of demolition drive shaft should be in the telescopic sleeve and flange axis printing assembly mark, for re-assembly to maintain the original assembly relationship.
7. Should always be universal joint cross bearing grease, the summer should be injected into the No. 3 lithium-based grease, the winter injection of No. 2 lithium-based grease.
When the case of the pump body induced corrosion is not open, the application of hand hammer beating around the pump, while beating.
Leakage of the impeller, impeller impeller cone sleeve washed down, remove the impeller and then conical cones opened with a screwdriver, the tapered sleeve removed.
In the above-mentioned method of a guided shell removed, dismantling to the lowest impeller temporarily not to remove the impeller, the lower deflector shell after unscrewing the impeller position in the shaft for a mark and then removed, So as not to affect the location of the entire installation of the shaft position and clearance adjustment.
When the case of deep cavitation pumping body is not open, the application of hand hammer beating around the pump body, while beating with a large pipe clamp on the pump to the left-hand screw, generally can be opened
Put part of the work flat on the board, first remove the filter pipe. Single-stage centrifugal pump, the upper and lower diversion shells to be imprinted each section marks, note the sequence number, to prevent the installation of the wrong. Remove the fixing screws between the two water pumps. From the above order down demolition. First remove the deflector shell, the demolition of the use of special tools or pipe clamp stuck, the shell screwed down (positive thread). Leakage of the impeller, impeller impeller cone sleeve washed down, remove the impeller and then conical cones opened with a screwdriver, the tapered sleeve removed.
In the above-mentioned method of a guided shell removed, dismantling to the lowest impeller temporarily not to remove the impeller, the lower deflector shell after unscrewing the impeller position in the shaft for a mark and then removed, So as not to affect the location of the entire installation of the shaft position and clearance adjustment.
In order to ensure the normal work of the drive shaft, shaft to extend its service life, should be noted in use:
1. It is strictly forbidden to start high-speed gears for automobiles.
2. Climb the clutch pedal.
3. It is strictly forbidden to overload the vehicle and speed up the vehicle.
4. The working condition of the drive shaft should always be checked.
5. Should always check the drive shaft hanger fastening, whether the damage to the bearing rubber, shaft connection parts are loose, whether the transmission shaft deformation.
6. In order to ensure the dynamic balance of the drive shaft, should always pay attention to whether the balance of solder-off. New drive shaft assembly is provided in the new drive shaft loading should pay attention to the extension of the assembly of the tag should ensure that the flange fork in a plane. In the maintenance of demolition drive shaft should be in the telescopic sleeve and flange axis printing assembly mark, for re-assembly to maintain the original assembly relationship.
7. Should always be universal joint cross bearing grease, the summer should be injected into the No. 3 lithium-based grease, the winter injection of No. 2 lithium-based grease.
When the case of the pump body induced corrosion is not open, the application of hand hammer beating around the pump, while beating.
Leakage of the impeller, impeller impeller cone sleeve washed down, remove the impeller and then conical cones opened with a screwdriver, the tapered sleeve removed.
In the above-mentioned method of a guided shell removed, dismantling to the lowest impeller temporarily not to remove the impeller, the lower deflector shell after unscrewing the impeller position in the shaft for a mark and then removed, So as not to affect the location of the entire installation of the shaft position and clearance adjustment.
When the case of deep cavitation pumping body is not open, the application of hand hammer beating around the pump body, while beating with a large pipe clamp on the pump to the left-hand screw, generally can be opened
Deep well submersible pump and long shaft deep well pump how to control
Deep well submersible pump and long shaft deep well pump how to control
1 control features: groundwater as a water source of the water, usually deep well submersible pumps to take water. The smaller groundwater plant consists of a deep well pump and a regulating water tower (the "one well one tower"). The deep well pump sends the groundwater to the regulation water tower, the water tower head water from the water tower to the user, this water supply way commonly used in the small town water works or the small and medium-sized factory water supply. Large-scale groundwater plants need to pool the water from several deep-well pump houses (commonly known as "well groups"), which are transported from pressurized pumping stations to distribution networks, often in medium-sized urban waterworks or Large factory water supply.
Deep well pump according to the motor where the external points are ordinary deep well pump (the motor is located in the tube wellhead above) and submersible pumps (pumps and motors are located in the tube well below the surface) two. Ordinary deep well pump shaft is longer, the bearing is lubricated and cooled by itself water flow. When the motor is started, the bearing is water-free, so the bearing pre-charging lubricating cooling water ("pre-run") is required before starting the water pump.
In the product manual often stressed "pre-run", and in actual operation, only the first pump or deep well pump after long-term use and then start, or the well water level is low when the pre-runner. General well water level is high, the well is very moist, the bearing clearance water is not easy to volatilize, so the general deep well pump without pre-run water to start to simplify the control wiring.
2, a well of a deep well pump motor control wiring: a well of a well pump water supply tower, according to adjust the water level of the water tower for automatic control, low water level automatically open pump, high water level automatically stop the pump. Water level control components are generally used GSK reed type bit controller or YX-150 electric contact pressure gauge (0 ~ 0.1MPa range, installed in the tank 2 ~ 3m height is appropriate).
3 well group control: deep well pump well group, the distance between wells is generally 300 ~ 800m, deep well pump motor capacity of about 10 ~ 100kW, the general deep well by a dedicated transformer power supply, using a transformer on a motor power distribution. Deep well pump well groups are generally centralized control in the control room.
How to know the specific working head of deep well submersible pump
How to know the specific working head of deep well submersible pump
The so-called submersible pump working head refers to the submersible pump installation project has been completed, is running the pump head.
From (3-2) we can see that the pump head H = E2-E1. The horizontal centrifugal pump shown in Figure 4-1 is analyzed. Take the surface 0-0 of the suction pool as the datum, list the energy equation of the pump inlet section 1-1 and the submerged pump outlet section 2-2. The head is
H = E2-E1
Where zl, - the position head, the absolute pressure head and the velocity head (m) corresponding to the end face 1-1;
Corresponds to the position head, the absolute pressure head and the velocity head (m) at section 2-2.
In order to view the work of the submersible pump head, in the submersible pump inlet and outlet sections were installed at the vacuum gauge and pressure gauge. Vacuum and pressure gauge readings for the relative pressure, there are
P1 = Pa - Pv
P2 = pa + pd
Where pa - atmospheric pressure (Pa);
Pv - vacuum meter reading (Pa);
Pd - pressure gauge reading (Pa).
Because the submersible pump suction pipe and pressure pipe diameter is basically the same, so u1, u2 difference is very small,
Can be ignored; the actual project △ Z is also very small, can also be ignored. (4-5) in the practical application can be written as
H = Hv + Hd (4-6)
Formula (4-6) is the work of the submersible pump working head calculation formula, that is, as long as the running pump vacuum gauge and pressure gauge readings (by mHO total), you can get the work of the corresponding pump head pressure.
The so-called submersible pump working head refers to the submersible pump installation project has been completed, is running the pump head.
From (3-2) we can see that the pump head H = E2-E1. The horizontal centrifugal pump shown in Figure 4-1 is analyzed. Take the surface 0-0 of the suction pool as the datum, list the energy equation of the pump inlet section 1-1 and the submerged pump outlet section 2-2. The head is
H = E2-E1
Where zl, - the position head, the absolute pressure head and the velocity head (m) corresponding to the end face 1-1;
Corresponds to the position head, the absolute pressure head and the velocity head (m) at section 2-2.
In order to view the work of the submersible pump head, in the submersible pump inlet and outlet sections were installed at the vacuum gauge and pressure gauge. Vacuum and pressure gauge readings for the relative pressure, there are
P1 = Pa - Pv
P2 = pa + pd
Where pa - atmospheric pressure (Pa);
Pv - vacuum meter reading (Pa);
Pd - pressure gauge reading (Pa).
Because the submersible pump suction pipe and pressure pipe diameter is basically the same, so u1, u2 difference is very small,
Can be ignored; the actual project △ Z is also very small, can also be ignored. (4-5) in the practical application can be written as
H = Hv + Hd (4-6)
Formula (4-6) is the work of the submersible pump working head calculation formula, that is, as long as the running pump vacuum gauge and pressure gauge readings (by mHO total), you can get the work of the corresponding pump head pressure.
Non-plugging sewage pump shaft alignment method
1. The twist of vertical axis method
For pipeline non-clog sewage pump, the scene is the most simple method is to lay a direct axis method, the direct axis, the axis on the hardwood (or pad on the square iron steel sheet), concave down. Then, twisting rod with a hammer knock, make the shaft concave surface of the material by knocking and extension, the shaft alignment. Twist rod used steel commonly, also can use brass rod twisting rod, its bottom end arc need to match the axial surface, aimed at axial surface twist when no damage.
Knock when should pay attention to methods: begin with bending of the largest local, the scope for 1/3 of the circumference of a circle, playing can be drawn on the advance in the shaft well, a third beat the number of times to some more, circular arc center on both sides of the knock the less the number of times. After initial can be faster, slower. In the process of twist to play, to measure the change of shaft bending in time, don't play too hard. Support is soft than twist rod, and the bigger and shaft interface. If this is not the case that supports a hard, and shaft interface and small, that equals the concavo-convex surface twist together play, shaft alignment.
2. The alignment:
Heating straightening method is suitable for the small bending radius, larger diameter, hardness is not less than 35 HRC of carbon steel, alloy steel and stainless steel shaft. Local principle by oxyacetylene flame heating shaft, the heated area due to heat expansion, but around cold area and because of its rigidity and limit its inflation. Therefore, hot extrusion, cooling, hotspots and volume contraction, contract to pull the surrounding area. So was born the reverse bending, to make up for the original bending capacity, so as to achieve the goal of alignment.
Heating straightening method note: heating before, should first will have no blocked sewage pump top loosen clamping shaft parts, for heating, so as not to damage the top after heating axial elongation. When the first heating straightening is not enough, need straightening again, for dot heating or strip heating, should avoid the original heating area, in order to prevent the repeated heating, reduce the microstructure change and shrinkage crack. School after heat treatment in order to prevent new deformation, stress relief, should be the school after heat treatment, heating the oxyacetylene flame nozzle, and the parts diameter determine its size. The heating area including bar, serpentine shape and round dot. Bending amount is larger, the fractional heating straightening, not a long time heating, in order to avoid burning work surface.
Hot straightening is the key to the location and direction of bending must find right, heating flame will and bending in the same direction, can appear otherwise) or more of the bend.
Deep well pump bearing disassembly and installation technology of the three allow
Deep well pump bearing disassembly and installation technology of the three allow
1 allows the speed: the device is correct, good lubrication environment, allowing 0.3-0.5 times the bearing speed limit. Under normal circumstances, the appropriate 0.2 times the speed limit.
2 to allow the tilt angle: water pump bearings generally do not allow the tilt axis relative to the shell hole, such as tilt, less than 2
3 Allowable temperature: normal load, and the lubricant has the advantages of high temperature performance, adequate lubrication conditions, the total IKO bearings allow operation in the 30-150 ℃ temperature environment.
In addition, leaving a gap between 0.20.5mm should be hole seat and bearing NSK bearings, the device error caused by inaccuracies caused by parts processing, operation, the center of the bearing ring offset, the gap can ensure that its automatic adjustment to prevent contact friction ,normal operation. Bearing knowledge
Deep well pump bearing device is the correct seat can be automatically adapted to move moving, located in the upper and lower raceway. NSK bearing device, maintenance should be vertical axis and axis centerline. Otherwise, it will cause serious damage to the pump bearings, the device process requires careful attention, the heart should be fine, strictly according to the normal operation method.
Deep well pump bearing assembly and assembly have a certain principle is three allow, remember that three can be successfully installed and disassembled. According to the size of the size, location and conditions of use and environmental conditions, the accuracy of the appropriate bearing is to ensure bearing life and reliability of the premise.
1 allows the speed: the device is correct, good lubrication environment, allowing 0.3-0.5 times the bearing speed limit. Under normal circumstances, the appropriate 0.2 times the speed limit.
2 to allow the tilt angle: water pump bearings generally do not allow the tilt axis relative to the shell hole, such as tilt, less than 2
3 Allowable temperature: normal load, and the lubricant has the advantages of high temperature performance, adequate lubrication conditions, the total IKO bearings allow operation in the 30-150 ℃ temperature environment.
In addition, leaving a gap between 0.20.5mm should be hole seat and bearing NSK bearings, the device error caused by inaccuracies caused by parts processing, operation, the center of the bearing ring offset, the gap can ensure that its automatic adjustment to prevent contact friction ,normal operation. Bearing knowledge
Deep well pump bearing device is the correct seat can be automatically adapted to move moving, located in the upper and lower raceway. NSK bearing device, maintenance should be vertical axis and axis centerline. Otherwise, it will cause serious damage to the pump bearings, the device process requires careful attention, the heart should be fine, strictly according to the normal operation method.
Deep well pump bearing assembly and assembly have a certain principle is three allow, remember that three can be successfully installed and disassembled. According to the size of the size, location and conditions of use and environmental conditions, the accuracy of the appropriate bearing is to ensure bearing life and reliability of the premise.
2017年1月22日星期日
Inspection and Maintenance of Deep Well Pump Ring
Deep well pump parts inspection and repair is divided into mouth ring, impeller, balance device, shaft seal device, pump shaft, bearings, pump, etc. are described below.
1. ring (also known as seal ring)
The role of the upper ring deep well pump ring is formed in the impeller and pump shell narrow, tortuous channel, to increase the flow resistance of the medium to achieve the purpose of reducing media leakage. The ring is also set to protect the main parts of the pump from the role of wear and tear in the mouth ring wear and tear, you can repair or replace the new ring to restore the normal assembly gap, which is economical and easy maintenance. The integrity of the mouth ring and its radial gap with the impeller asked the gap, in the demolition of the pump should first check. If the mouth ring has grooves or other defects or has ruptured, or gap over the required value, should replace the new mouth ring or repair the original mouth ring repair welding.
Pump in operation, the mouth of the ring and the impeller corresponding to the wear and tear caused by the gap increased by more than the specified value, because the new ring diameter should be the impeller inlet diameter to the preparation of the impeller and the ring between the radial ring asked Gap provisions. In the repair process, the gap to a smaller point in order to improve the pump efficiency and extend the use of time.
1. Repair welding steps are as follows:
1) Brush the dirt on the ring.
2) with the mass fraction of 5% hydrochloric acid, activated again.
3) into the temperature of 90 ℃, l0% mass fraction of caustic soda in the dip, and then placed in clean water, 90 ℃.
4) repair welding alloy. Preheat the mouth ring to about 100 ℃, with the appropriate welding ring welding alloy on the original ring, with the same alloy with the original alloy pre-cast into the electrode, along the circumference of the circle or vertical direction along a road even welding up (not repeated Re-welding). After welding, can be machined to the required standard size.
If the alloy produced peeling, loss or excessive wear and tear can not be used repair welding repair, will have to re-alloying. After installing the new mouth ring, it should check whether it meets the requirements of the gap with the impeller. At the same time, to check the friction between the two asked whether the phenomenon, the method is coated in the rotor part of the red lead powder, and then turn the rotor, if the mouth ring with red lead powder must be rework.
1. ring (also known as seal ring)
The role of the upper ring deep well pump ring is formed in the impeller and pump shell narrow, tortuous channel, to increase the flow resistance of the medium to achieve the purpose of reducing media leakage. The ring is also set to protect the main parts of the pump from the role of wear and tear in the mouth ring wear and tear, you can repair or replace the new ring to restore the normal assembly gap, which is economical and easy maintenance. The integrity of the mouth ring and its radial gap with the impeller asked the gap, in the demolition of the pump should first check. If the mouth ring has grooves or other defects or has ruptured, or gap over the required value, should replace the new mouth ring or repair the original mouth ring repair welding.
Pump in operation, the mouth of the ring and the impeller corresponding to the wear and tear caused by the gap increased by more than the specified value, because the new ring diameter should be the impeller inlet diameter to the preparation of the impeller and the ring between the radial ring asked Gap provisions. In the repair process, the gap to a smaller point in order to improve the pump efficiency and extend the use of time.
1. Repair welding steps are as follows:
1) Brush the dirt on the ring.
2) with the mass fraction of 5% hydrochloric acid, activated again.
3) into the temperature of 90 ℃, l0% mass fraction of caustic soda in the dip, and then placed in clean water, 90 ℃.
4) repair welding alloy. Preheat the mouth ring to about 100 ℃, with the appropriate welding ring welding alloy on the original ring, with the same alloy with the original alloy pre-cast into the electrode, along the circumference of the circle or vertical direction along a road even welding up (not repeated Re-welding). After welding, can be machined to the required standard size.
If the alloy produced peeling, loss or excessive wear and tear can not be used repair welding repair, will have to re-alloying. After installing the new mouth ring, it should check whether it meets the requirements of the gap with the impeller. At the same time, to check the friction between the two asked whether the phenomenon, the method is coated in the rotor part of the red lead powder, and then turn the rotor, if the mouth ring with red lead powder must be rework.
Inspection and repair of deep well submersible pump parts
Inspection and repair of deep well submersible pump parts
Parts inspection and repair is divided into mouth ring, impeller, balance device, shaft seal device, pump shaft, bearings, pump, etc. are described below.
One deep well submersible pump impeller repair as follows:
Replacement of the impeller Impeller used may cause some damage, should replace the impeller. Impeller surface cracks. Impeller surface due to corrosion, erosion or cavitation to form more holes. Due to erosion caused by impeller cover and leaves thinning, affecting the mechanical strength. The impeller of the mouth ring hub more serious partial grinding phenomenon without repair value.
1. Deep well pump impeller repair:
1) If impeller corrosion is not serious or trachoma is not much, you can use repair welding method repair copper brass repair welding with brass, cast iron impeller can also be used brass repair welding.
2) welding method is to be welded before welding parts of the site to be cleaned, remove oil, rust, oxide and so on. Can be partially or entirely preheated to 250 ~ 450 ℃. Welding powder is generally used powder 301, wire is usually selected wire 224 silicon brass wire, gas welding flame should be a slight oxidation flame or neutral flame, the general operation of pressure welding method to reduce the weld metal overheating and improve the weld The formation, in operation, should try to avoid the high temperature of the flame heart and the molten pool of metal in direct contact, so as not to produce the weld metal pores. Post-welding insulation slow cooling to eliminate stress and improve performance. After cooling, it can be machined.
3) Single-ring-type ring wheel hub wear groove marks, or partial grinding phenomenon is not serious, can be used abrasive grinding, the thickness of the car can also be allowed to light. Or by metal spraying * restore the original size.
4) double-ring inner ring seal edge wear groove marks, or partial grinding phenomenon is not serious, can also be used abrasive grinding, the thickness of the case can also be car light. Wear or serious partial wear, you can replace the new inner ring.
5) New impeller or repaired impeller shall be subjected to static balance test. Impeller balance method is to go heavy method, the test can be finished on the milling machine into the impeller. On the heavier side, the chips were weighed against the lighter side of the object that was sandwiched during the balancing test. But the impeller cover to the thickness of the impeller cover can not exceed the thickness of the l / 3, allowing the front and rear cover to cut off, cutting part of the traces should be smooth transition with the cover plate.
Parts inspection and repair is divided into mouth ring, impeller, balance device, shaft seal device, pump shaft, bearings, pump, etc. are described below.
One deep well submersible pump impeller repair as follows:
Replacement of the impeller Impeller used may cause some damage, should replace the impeller. Impeller surface cracks. Impeller surface due to corrosion, erosion or cavitation to form more holes. Due to erosion caused by impeller cover and leaves thinning, affecting the mechanical strength. The impeller of the mouth ring hub more serious partial grinding phenomenon without repair value.
1. Deep well pump impeller repair:
1) If impeller corrosion is not serious or trachoma is not much, you can use repair welding method repair copper brass repair welding with brass, cast iron impeller can also be used brass repair welding.
2) welding method is to be welded before welding parts of the site to be cleaned, remove oil, rust, oxide and so on. Can be partially or entirely preheated to 250 ~ 450 ℃. Welding powder is generally used powder 301, wire is usually selected wire 224 silicon brass wire, gas welding flame should be a slight oxidation flame or neutral flame, the general operation of pressure welding method to reduce the weld metal overheating and improve the weld The formation, in operation, should try to avoid the high temperature of the flame heart and the molten pool of metal in direct contact, so as not to produce the weld metal pores. Post-welding insulation slow cooling to eliminate stress and improve performance. After cooling, it can be machined.
3) Single-ring-type ring wheel hub wear groove marks, or partial grinding phenomenon is not serious, can be used abrasive grinding, the thickness of the car can also be allowed to light. Or by metal spraying * restore the original size.
4) double-ring inner ring seal edge wear groove marks, or partial grinding phenomenon is not serious, can also be used abrasive grinding, the thickness of the case can also be car light. Wear or serious partial wear, you can replace the new inner ring.
5) New impeller or repaired impeller shall be subjected to static balance test. Impeller balance method is to go heavy method, the test can be finished on the milling machine into the impeller. On the heavier side, the chips were weighed against the lighter side of the object that was sandwiched during the balancing test. But the impeller cover to the thickness of the impeller cover can not exceed the thickness of the l / 3, allowing the front and rear cover to cut off, cutting part of the traces should be smooth transition with the cover plate.
Loading and Unloading Method of Automatic Mixing Sewage Pump
Loading and Unloading Method of Automatic Stirring Sewage Pump
Automatic mixing sewage pump is a pump body, pump cover, gear, bearing sleeve and shaft seal and other components. The gears are nitrided, have a higher hardness and wear resistance, with the shaft installed in the sleeve. All the running parts of the pump are lubricated by the medium they convey.
With the increase in the use of time, automatic mixing sewage pump will appear pump oil shortage, or even failure of pump oil, mainly due to excessive wear and tear on the relevant parts. Gear-type lubricating oil pump wear parts are the main shaft and bushings, passive gear center hole and pin, automatic mixing sewage pump shell cavity and gear, gear end and pump cover. Lubricating oil pump wear and tear after its main technical indicators can not meet the requirements, how to disassemble and disassemble gear should be disassembled, identify the location and extent of wear and take appropriate measures to be repaired.
Automatic mixing sewage pump is a pump body, pump cover, gear, bearing sleeve and shaft seal and other components. The gears are nitrided, have a higher hardness and wear resistance, with the shaft installed in the sleeve. All the running parts of the pump are lubricated by the medium they convey.
With the increase in the use of time, automatic mixing sewage pump will appear pump oil shortage, or even failure of pump oil, mainly due to excessive wear and tear on the relevant parts. Gear-type lubricating oil pump wear parts are the main shaft and bushings, passive gear center hole and pin, automatic mixing sewage pump shell cavity and gear, gear end and pump cover. Lubricating oil pump wear and tear after its main technical indicators can not meet the requirements, how to disassemble and disassemble gear should be disassembled, identify the location and extent of wear and take appropriate measures to be repaired.
Parts Repairing Method of Automatic Stirring Sewage Pump
Parts Repairing Method of Automatic Stirring Sewage Pump
Automatic mixing sewage pump shell cavity repair: pump shell cavity wear, the general use of internal cavity set method of repair, is about to be lined with large cast iron or steel liner. After inserts, the inner cavity is lined to the desired size and the bushing protruding from the end face is flushed away so that it is flush with the pump housing interface. Valve seat repair: pressure limiting valve has two kinds of spherical valve and plunger valve. Ball seat wear, you can put a ball on the valve seat, and then gently tap the ball with a metal rod, until the ball valve and valve seat close together. Such as valve seat wear serious, can be re-sharpened to remove wear marks, and then the method to make it close. Plunger valve seat wear, you can put a little valve sand grinding, until the close so far.
Repair of the sewage pump cover with automatic mixing
Work plane repair: If the automatic mixing sewage pump cover work surface wear is small, can be used manual grinding method to eliminate wear traces, that is, the platform or thick glass plate put a little valve sand, and then automatically stir the sewage pump cover on the top Grinding, until the wear and tear to eliminate the work surface smooth. When the automatic mixing sewage pump cover work surface wear depth of more than 0.1 mm, should be taken after the first grinding grinding method repair.
Repair of the drive shaft bushing hole: The repair of the wear of the drive shaft bush bore on the pump cover is the same as the repair of the housing drive shaft bushing wear.
Turn the gears to use
Automatic mixing sewage pump gear wear is mainly in the tooth thickness parts, while the gear end and the top of the wear are relatively light. Gear in the tooth thickness parts are unilateral wear, so the gear can be used to flip 180 degrees. When the gear end surface wear, the end surface can be polished, while grinding oil pump housing surface to ensure that the gear end and the pump cover of the gap in the standard range
Automatic mixing sewage pump shell cavity repair: pump shell cavity wear, the general use of internal cavity set method of repair, is about to be lined with large cast iron or steel liner. After inserts, the inner cavity is lined to the desired size and the bushing protruding from the end face is flushed away so that it is flush with the pump housing interface. Valve seat repair: pressure limiting valve has two kinds of spherical valve and plunger valve. Ball seat wear, you can put a ball on the valve seat, and then gently tap the ball with a metal rod, until the ball valve and valve seat close together. Such as valve seat wear serious, can be re-sharpened to remove wear marks, and then the method to make it close. Plunger valve seat wear, you can put a little valve sand grinding, until the close so far.
Repair of the sewage pump cover with automatic mixing
Work plane repair: If the automatic mixing sewage pump cover work surface wear is small, can be used manual grinding method to eliminate wear traces, that is, the platform or thick glass plate put a little valve sand, and then automatically stir the sewage pump cover on the top Grinding, until the wear and tear to eliminate the work surface smooth. When the automatic mixing sewage pump cover work surface wear depth of more than 0.1 mm, should be taken after the first grinding grinding method repair.
Repair of the drive shaft bushing hole: The repair of the wear of the drive shaft bush bore on the pump cover is the same as the repair of the housing drive shaft bushing wear.
Turn the gears to use
Automatic mixing sewage pump gear wear is mainly in the tooth thickness parts, while the gear end and the top of the wear are relatively light. Gear in the tooth thickness parts are unilateral wear, so the gear can be used to flip 180 degrees. When the gear end surface wear, the end surface can be polished, while grinding oil pump housing surface to ensure that the gear end and the pump cover of the gap in the standard range
The Characteristics of Deep Well Submerged Pump
The Characteristics of Deep Well Submerged Pump
⑴ pumping station is not afraid of flooding
For low-lying areas prone to flooding, flood diversion and pumping stations are often flooded when the dike bursts or exceeds the design criteria for heavy rainfall. Once the pump station of the electrical and mechanical equipment is water immersion, cleaning and baking repair work is very large, will delay the drainage time, increase disaster losses. Therefore, the conventional pump station itself is also a very important issue of flood control and moisture problems. But the submersible pump uses a submersible motor, water pump unit can run underwater. Therefore, even if the pump station is flooded, as long as the motor is not overloaded, the pump can work in the stable area submersible pump can be put into operation at any time.
⑵ Deep well pump quick disassembly unit
Previous submersible pump and outlet pipe is bolted, deep well submersible pump is mainly used for deep water, small construction drainage. But the modern submersible pump and the outlet pipe has been achieved between the automatic coupling, in the case of a fixed water pipe, no bolts can quickly install and remove the pump unit, which greatly accelerated the unit installation and maintenance speed. Cangzhou, Hebei Province, such as the leaves of three pumping stations, each of the conventional diameter of 1.4 meters vertical axial flow pump unit installation time of 15-20 days, while the same diameter submersible pump only 1 day. For small submersible pump unit, installation and removal is more convenient, and some just 1 hour can be installed or demolished. This is for the flood control and drainage needs of emergency disassembly pump station is very favorable.
The current large-diameter submersible pump installation of the main types of wellbore and rail-type two. Axial flow and guide vane mixed-flow submersible pump is the main installation of the wellbore. There are also wellbore suspension type, pipe type, floor type, open type and so on, and also for different types of inlet runners, but also can be used to take off the drum type submersible pump.
⑴ pumping station is not afraid of flooding
For low-lying areas prone to flooding, flood diversion and pumping stations are often flooded when the dike bursts or exceeds the design criteria for heavy rainfall. Once the pump station of the electrical and mechanical equipment is water immersion, cleaning and baking repair work is very large, will delay the drainage time, increase disaster losses. Therefore, the conventional pump station itself is also a very important issue of flood control and moisture problems. But the submersible pump uses a submersible motor, water pump unit can run underwater. Therefore, even if the pump station is flooded, as long as the motor is not overloaded, the pump can work in the stable area submersible pump can be put into operation at any time.
⑵ Deep well pump quick disassembly unit
Previous submersible pump and outlet pipe is bolted, deep well submersible pump is mainly used for deep water, small construction drainage. But the modern submersible pump and the outlet pipe has been achieved between the automatic coupling, in the case of a fixed water pipe, no bolts can quickly install and remove the pump unit, which greatly accelerated the unit installation and maintenance speed. Cangzhou, Hebei Province, such as the leaves of three pumping stations, each of the conventional diameter of 1.4 meters vertical axial flow pump unit installation time of 15-20 days, while the same diameter submersible pump only 1 day. For small submersible pump unit, installation and removal is more convenient, and some just 1 hour can be installed or demolished. This is for the flood control and drainage needs of emergency disassembly pump station is very favorable.
The current large-diameter submersible pump installation of the main types of wellbore and rail-type two. Axial flow and guide vane mixed-flow submersible pump is the main installation of the wellbore. There are also wellbore suspension type, pipe type, floor type, open type and so on, and also for different types of inlet runners, but also can be used to take off the drum type submersible pump.
Working principle and structure of deep well pump mechanical seal
Working principle and structure of deep well pump mechanical seal
A deep well pump mechanical seal is a dynamic seal formed by a set of sealed end faces. Many types of mechanical seals, but the working principle is basically the same. Mechanical seal mainly by the four major components: the ring 2 and static ring 1 composed of the main dynamic seal, moving two together with the pump shaft rotation, stationary ring fixed in the gland 3 | anti-rotation pin 9 to prevent it from turning, (B, C, D) used O-shaped or V-shaped seals 7 and 8 of the composition of the auxiliary dense. Component; the other side of the sealing surface, By the spring 4 and other components of the compression element _ by the drive seat 5 and the key or fixed pin 6 and other components of the dynamic components.
Mechanical seals typically have four possible leak points, B, C, and D. Seal point A in the ring and static ring contact surface, it is mainly by the pump fluid pressure and spring force will be moving ring | attached to the static ring, to prevent the A point of leakage. But the two rings of the contact surface A there will always be a small amount of liquid leakage, it can form a liquid on the one hand to prevent leakage, on the other hand can play a lubricating effect. To ensure the two sides of the end of a good fit, both ends straight and smooth. The sealing point JB is between the stationary ring and the gland, which is a static sealing point. With a flexible O-shaped (or V-shaped) ring pressure between the stationary ring and the gland, the spring force by the elastic seal deformation and seal. The sealing point C is located between the moving ring and the shaft, and it is also a static seal, and a V-shaped seal having elasticity and self-compactness can be used in consideration of the axial movement of the moving ring. The sealing point D is also a static seal between the sealing box and the gland. A sealing ring or a gasket may be used as the sealing member. _ From the structural point of view, the mechanical seal will be easy to leak the shaft seal, instead of more difficult to leak the static seal and end face radial I. I. seal. By the dynamic ring surface and the static ring end surface of the radial contact dynamic seal is to determine the mechanical seal performance and life key.
A deep well pump mechanical seal is a dynamic seal formed by a set of sealed end faces. Many types of mechanical seals, but the working principle is basically the same. Mechanical seal mainly by the four major components: the ring 2 and static ring 1 composed of the main dynamic seal, moving two together with the pump shaft rotation, stationary ring fixed in the gland 3 | anti-rotation pin 9 to prevent it from turning, (B, C, D) used O-shaped or V-shaped seals 7 and 8 of the composition of the auxiliary dense. Component; the other side of the sealing surface, By the spring 4 and other components of the compression element _ by the drive seat 5 and the key or fixed pin 6 and other components of the dynamic components.
Mechanical seals typically have four possible leak points, B, C, and D. Seal point A in the ring and static ring contact surface, it is mainly by the pump fluid pressure and spring force will be moving ring | attached to the static ring, to prevent the A point of leakage. But the two rings of the contact surface A there will always be a small amount of liquid leakage, it can form a liquid on the one hand to prevent leakage, on the other hand can play a lubricating effect. To ensure the two sides of the end of a good fit, both ends straight and smooth. The sealing point JB is between the stationary ring and the gland, which is a static sealing point. With a flexible O-shaped (or V-shaped) ring pressure between the stationary ring and the gland, the spring force by the elastic seal deformation and seal. The sealing point C is located between the moving ring and the shaft, and it is also a static seal, and a V-shaped seal having elasticity and self-compactness can be used in consideration of the axial movement of the moving ring. The sealing point D is also a static seal between the sealing box and the gland. A sealing ring or a gasket may be used as the sealing member. _ From the structural point of view, the mechanical seal will be easy to leak the shaft seal, instead of more difficult to leak the static seal and end face radial I. I. seal. By the dynamic ring surface and the static ring end surface of the radial contact dynamic seal is to determine the mechanical seal performance and life key.
Unit installation process of deep well submersible pump
Unit installation process of deep well submersible pump
1. Deep well submersible pump device consists of water pump, motor, water pipes, waterproof cables and control switch composed of five parts, single-suction multi-stage vertical centrifugal pump.
2. In order to prevent the sand from entering the motor, the motor is equipped with sandblasting device and skeleton oil seal, composed of sand control mechanism, the whole motor is sealed structure.
3. Submersible motor wet flush structure, cavity filled with water, mainly for motor cooling, and bearing lubrication. In the course of running as a result of temperature changes, causing the motor cavity flushing pressure changes, by the motor voltage regulator device automatically adjusts the lower end.
4. Motor stator windings with water-resistant magnet wire, a good insulation and water resistance, the rotor for the cage structure. In this case,
5. Motor with the top of the water injection holes and exhaust holes, the lower end with a water hole.
6. Motor thrust bearing plate with the thrust bearing plate, the main bear the residual axial force of the pump and the rotor weight of the motor.
1. Deep well submersible pump device consists of water pump, motor, water pipes, waterproof cables and control switch composed of five parts, single-suction multi-stage vertical centrifugal pump.
2. In order to prevent the sand from entering the motor, the motor is equipped with sandblasting device and skeleton oil seal, composed of sand control mechanism, the whole motor is sealed structure.
3. Submersible motor wet flush structure, cavity filled with water, mainly for motor cooling, and bearing lubrication. In the course of running as a result of temperature changes, causing the motor cavity flushing pressure changes, by the motor voltage regulator device automatically adjusts the lower end.
4. Motor stator windings with water-resistant magnet wire, a good insulation and water resistance, the rotor for the cage structure. In this case,
5. Motor with the top of the water injection holes and exhaust holes, the lower end with a water hole.
6. Motor thrust bearing plate with the thrust bearing plate, the main bear the residual axial force of the pump and the rotor weight of the motor.
Submersible pump water supply station out of the pool water level settings
Submersible pump water supply station out of the pool water level settings
A submersible pump water supply pump station into the pool water level should be used according to the following provisions:
1, flood water level: According to the provisions of Table 3.1.1 of this specification.
2, the design level: from the rivers, lakes or reservoirs to take water, take water to ensure that the rate of 95% to 97% of the average daily or ten days
Water level; water from the channel, take the channel through the design of the water level when the flow.
3, the maximum operating water level: from the rivers, lakes, water, take the return period of 10 to 20 years a flood daily average water level;
When water is taken from the reservoir, it is determined according to the storage capacity of the reservoir; when the water is taken from the channel, the water level of the channel is increased when the flow is increased.
4, the minimum operating water level: water from the river, lake or reservoir, the water source to ensure that the rate of 97% to 99% of the lowest level
Water level; water from the channel, the channel through a single pump flow when the water level.
5, the average water level: water from a river, lake or reservoir, take years of average water level; from the channel when taking water, take the canal
The water level when the road passes through the uniform flow.
6, the water level should be deducted from the water intake into the pool of water loss. From the river bed instability of water, the Shang
Should take into account the impact of river bed changes, the water tank can be used as the corresponding characteristics of the water level.
Second, the submersible water pump station water level should be used according to the following provisions:
1, the highest water level: check the water level of the water channel.
2, the design of water level: take the pump design flow corresponding to the water level.
3, the maximum operating water level: take the pump station to increase the flow of the corresponding water level.
4, the minimum operating water level: take a pump with a single pump corresponding to the water level.
5, uniform water level: take the water channel through the uniform flow of water level
A submersible pump water supply pump station into the pool water level should be used according to the following provisions:
1, flood water level: According to the provisions of Table 3.1.1 of this specification.
2, the design level: from the rivers, lakes or reservoirs to take water, take water to ensure that the rate of 95% to 97% of the average daily or ten days
Water level; water from the channel, take the channel through the design of the water level when the flow.
3, the maximum operating water level: from the rivers, lakes, water, take the return period of 10 to 20 years a flood daily average water level;
When water is taken from the reservoir, it is determined according to the storage capacity of the reservoir; when the water is taken from the channel, the water level of the channel is increased when the flow is increased.
4, the minimum operating water level: water from the river, lake or reservoir, the water source to ensure that the rate of 97% to 99% of the lowest level
Water level; water from the channel, the channel through a single pump flow when the water level.
5, the average water level: water from a river, lake or reservoir, take years of average water level; from the channel when taking water, take the canal
The water level when the road passes through the uniform flow.
6, the water level should be deducted from the water intake into the pool of water loss. From the river bed instability of water, the Shang
Should take into account the impact of river bed changes, the water tank can be used as the corresponding characteristics of the water level.
Second, the submersible water pump station water level should be used according to the following provisions:
1, the highest water level: check the water level of the water channel.
2, the design of water level: take the pump design flow corresponding to the water level.
3, the maximum operating water level: take the pump station to increase the flow of the corresponding water level.
4, the minimum operating water level: take a pump with a single pump corresponding to the water level.
5, uniform water level: take the water channel through the uniform flow of water level
Submersible sewage pump how to install the auto-coupling device
Submersible sewage pump how to install the auto-coupling device
Submersible sewage pump is generally set in the well (pit), the equipment method of fixed equipment and mobile equipment two methods. Mobile equipment is relatively simple, commonly used in small water pump equipment, the general selection of water hose. Fixed equipment is more cluttered, the device method is generally used for automatic coupling equipment with a larger submersible pump. The equipment order is: pouring concrete foundation, guide rod and pump seat, pump, outlet pipe and accessories.
Submersible pump installation: lifting the pump, the coupling device (couplings, submersible pumps and motors are generally made of equipment) into the guide rod, the pump along the guide bar slowly down until the coupled device and the pump seat Of the water elbow convergence, water pump outlet pipe and the inlet pipe coincides with the centerline.
Outlet pipe and accessories installation: pump outlet pipe and flange connection flange, outlet pipe on the other accessories include gate valve, expansion joints and check valves and other optional flange connection.
Pumps for maintenance, people do not have to enter the collection wells (pit), the choice of artificial or mechanical method of the pump from the collection wells (pit) with the pump body connected to the chain of the proposed chain. According to the size of the weight of the pump and the actual needs, can be made into a permanent stent stent or temporary support two. To improve the bracket set electric, manual hoist or pulley and improve the link-related links.
Experimental Study on Flow Field in Deep Well Pump
Experimental Study on Flow Field in Deep Well Pump
It is the key to improve the performance of deep well pump by studying the flow field, especially the flow field of the mixed-phase flow. With the PIV technology, LDV technology and ultrasonic technology matures, people can already use these advanced flow field test technology without interference in the case of the flow field for high-precision measurement. In this paper, PIV (Particle Imaging Velocimetry) is used to study the flow field of deep well pump in Canada. The main contents of this paper are to measure the flow of pump in different flow rate Field, and compared the flow field in deep well pump with single phase and mixed phase flow.
1 Particle Image Velocimetry and Image Processing
The basic principle of Particle Image Velocimetry (PIV) is to record the position of the particles in the flow field by optical method, and then get the displacement of the particles. Based on the particle The velocity and instantaneous motion parameters of the fluid at the particle location are measured.
Using PIV technology, many particles in the flow field can be recorded in the same image by multiple exposures in chronological order, and can also be recorded on different graphics by high-speed cameras. The parameters (particle displacements, velocities, etc.) reflecting the characteristics of the flow field can be obtained by a series of numerical operations using the relevant assumptions and laws of physics and mechanics and according to the corresponding mathematical model. Typically, PIV system mainly by the lighting system, PIV image recording storage system and PIV processing system components.
2 small gas-liquid two-phase deep well pump simulation test device
Deep well pump work in the underground, the working medium is not single-phase, it is difficult to work on the site of the deep well pump flow field for practical testing. In addition, because the formation conditions of each oil field is very complex, it is difficult to find a general law, therefore, in the laboratory established a small gas-liquid two-phase deep-well pump simulation test device, as shown in Figure 1.
The simulation test device is mainly composed of hydraulic control system and pneumatic control system. For the purpose of visualization, the pump barrel and plunger of the deep well pump model are made of organic glass. The pump diameter is 57mm, the plunger length is 0.3m, the simulation stroke is 0 ~ 0.6m, the impulse is 0 ~ 6 times / s , The internal pressure of 0.7MPa working conditions
It is the key to improve the performance of deep well pump by studying the flow field, especially the flow field of the mixed-phase flow. With the PIV technology, LDV technology and ultrasonic technology matures, people can already use these advanced flow field test technology without interference in the case of the flow field for high-precision measurement. In this paper, PIV (Particle Imaging Velocimetry) is used to study the flow field of deep well pump in Canada. The main contents of this paper are to measure the flow of pump in different flow rate Field, and compared the flow field in deep well pump with single phase and mixed phase flow.
1 Particle Image Velocimetry and Image Processing
The basic principle of Particle Image Velocimetry (PIV) is to record the position of the particles in the flow field by optical method, and then get the displacement of the particles. Based on the particle The velocity and instantaneous motion parameters of the fluid at the particle location are measured.
Using PIV technology, many particles in the flow field can be recorded in the same image by multiple exposures in chronological order, and can also be recorded on different graphics by high-speed cameras. The parameters (particle displacements, velocities, etc.) reflecting the characteristics of the flow field can be obtained by a series of numerical operations using the relevant assumptions and laws of physics and mechanics and according to the corresponding mathematical model. Typically, PIV system mainly by the lighting system, PIV image recording storage system and PIV processing system components.
2 small gas-liquid two-phase deep well pump simulation test device
Deep well pump work in the underground, the working medium is not single-phase, it is difficult to work on the site of the deep well pump flow field for practical testing. In addition, because the formation conditions of each oil field is very complex, it is difficult to find a general law, therefore, in the laboratory established a small gas-liquid two-phase deep-well pump simulation test device, as shown in Figure 1.
The simulation test device is mainly composed of hydraulic control system and pneumatic control system. For the purpose of visualization, the pump barrel and plunger of the deep well pump model are made of organic glass. The pump diameter is 57mm, the plunger length is 0.3m, the simulation stroke is 0 ~ 0.6m, the impulse is 0 ~ 6 times / s , The internal pressure of 0.7MPa working conditions
where to buy Septic tank with a cutting sewage pump
The use of cutting sewage pump to achieve clean-cut solution
In septic tanks, bathroom sets of wells containing a large number of solid feces, sanitary napkins and other fibrous media. Septic tanks in the decomposition of the bottom of the pool, the supernatant into the pipeline flow away, artificial regular cleaning septic tanks; in the toilet collection wells in the use of filters to filter solid material, the sewage with sewage pump to enhance, Clean the filter. Regular Qingtao work environment is poor, work intensity and large. The use of cutting pumps in these cases eliminates the need to install a filter, eliminating the Qingtao work, can save the user's expenses.
solution
Zenit cutting pump can be really chopped filamentous or easy winding of dirt, completely prevent the dirt on the pumps, pipes, valves and other clogging, do not need to install filtering equipment. Its main feature is installed in front of the impeller suction triangular cutting head and cutting blade composition of the cutting system (Figure 1). In the media into the impeller before the sewage into the feces, toilet paper and other solid material chopped, it can be completely avoid clogging.
In the cutting system, the triangular cutter and the impeller rotate synchronously, and the cutting cutter is fixed on the suction front cover. The cutting edge can be adjusted by the adjusting device on the cutterhead or the adjusting gasket on the cutting head to ensure the best cutting effect. Figure 1. Cutting system
Zenit has a total of seven series of cutting submersible sewage pump, power range of 0.74KW to 7.2KW, the maximum flow of 80m3 / h, the maximum head of 53m, to meet most of the sewage requirements. Triangle cutting head material for the high-chromium alloy steel (X102CrNiMo17Ku), cutting cutter for the stainless steel, cutting in a long time in the little wear and tear.
Figure 2 for the two-pole motor cutting system, triangular cutter and impeller speed of 2900rpm (50HZ). There are eight cutting holes on the cutterhead, so the cutting speed of up to 69,000 times / minute (2900X3X8). Figure 3 for the four-pole motor with the cutting system, triangular cutter and impeller speed 1450rpm (50HZ). There are 8 saw blades on the cutter, so the cutting speed of 34,000 times / min
In septic tanks, bathroom sets of wells containing a large number of solid feces, sanitary napkins and other fibrous media. Septic tanks in the decomposition of the bottom of the pool, the supernatant into the pipeline flow away, artificial regular cleaning septic tanks; in the toilet collection wells in the use of filters to filter solid material, the sewage with sewage pump to enhance, Clean the filter. Regular Qingtao work environment is poor, work intensity and large. The use of cutting pumps in these cases eliminates the need to install a filter, eliminating the Qingtao work, can save the user's expenses.
solution
Zenit cutting pump can be really chopped filamentous or easy winding of dirt, completely prevent the dirt on the pumps, pipes, valves and other clogging, do not need to install filtering equipment. Its main feature is installed in front of the impeller suction triangular cutting head and cutting blade composition of the cutting system (Figure 1). In the media into the impeller before the sewage into the feces, toilet paper and other solid material chopped, it can be completely avoid clogging.
In the cutting system, the triangular cutter and the impeller rotate synchronously, and the cutting cutter is fixed on the suction front cover. The cutting edge can be adjusted by the adjusting device on the cutterhead or the adjusting gasket on the cutting head to ensure the best cutting effect. Figure 1. Cutting system
Zenit has a total of seven series of cutting submersible sewage pump, power range of 0.74KW to 7.2KW, the maximum flow of 80m3 / h, the maximum head of 53m, to meet most of the sewage requirements. Triangle cutting head material for the high-chromium alloy steel (X102CrNiMo17Ku), cutting cutter for the stainless steel, cutting in a long time in the little wear and tear.
Figure 2 for the two-pole motor cutting system, triangular cutter and impeller speed of 2900rpm (50HZ). There are eight cutting holes on the cutterhead, so the cutting speed of up to 69,000 times / minute (2900X3X8). Figure 3 for the four-pole motor with the cutting system, triangular cutter and impeller speed 1450rpm (50HZ). There are 8 saw blades on the cutter, so the cutting speed of 34,000 times / min
Overview of hot water submersible pumps
Hot water submersible pump is the essential equipment to extract geothermal water. Can also be used for ponds, tanks, pressurized use. Specific can be used for hotel hot springs underground water, residential heating and so on.
Hot water submersible pump model description
For example: 250QJR100-20 / 1 250 that the application of the well diameter of not less than 250 mm.
Q that the diving (Hanyu Pinyin initial letter); J said well (Hanyu Pinyin initials). R means hot water (the first letter of Chinese pinyin)
100 means the flow rate is 100m3 / h; 20 means that the lift is 20 meters; / 1 means that the impeller is connected in series.
Scope of application
For enterprises and institutions such as: bath center, district heating, geothermal energy companies use power generation, extraction of underground hot water, according to different calibers we have different specifications for the user to choose models. The device low noise, high efficiency and save energy.
Technical Parameters:
1: Allowable operating water temperature range: +5 to +105 ℃
2: Solid impurity content (mass ratio) is not more than 0.01%
3: PH value (pH) 6.5-8.5
4: hydrogen sulfide content of not more than 1.5mg / L
5: chloride ion content of not more than 400mg / L
6: crew must completely invade the water work. Vertical use, select the model diameter and pump models to match, should not use large diameter diameter of small diameter pump, this is not conducive to the motor cooling.
Motor parameters
Hot water submersible pump motor lead length: 3m. If you need to extend the cable can call us in advance, submersible motor water lubrication, the use of the motor cavity must be filled with clean water, (Note: must be filled otherwise will reduce the motor life) If you forget to add water motor will Rapid burnout.
Motor protection class: IPX8
Electromagnetic wire adopts high temperature waterproof wire.
power supply
380V, the deviation does not exceed ± 5%, the frequency of 50HZ, the deviation does not exceed ± 1%, if the customer needs special voltage or special frequency need to inform us in advance.
Material
Impeller: cast iron HT200, or tin bronze (various brands) such as: ZCuSn3Zn8Pb6Ni1
Pump housing: cast iron HT200, or stainless steel such as: 2Gr13 .304
Pump shaft: cold-drawn steel chrome-plated, or stainless steel 2Gr13 (1050 ℃ quenched and tempered to enhance the torque)
Motor Seal: Rubber Seal O-Ring; Machine Seal.
Motor expansion regulating bladder rubber material.
how to determine Submersible sewage pump pool size
Determine the volume of the sump The size of the sump of the sewage pumping station should be based on the changes in the flow into the flow, the type of sewage pump selected, the number of units, work system, pump operation and start time and so on. The pool volume is too large will cause a large pool of sedimentation and increase the project cost; volume is too small and can not be full of water halo conditioning requirements. Therefore, according to the above conditions should be reasonable to determine the catchment volume.
Set the volume of the pool to meet the hydraulic layout, grille and sewage pump suction pipe installation requirements, in a timely manner in the future water pumping and avoid frequent pump starting and shutting down on the basis of the pool to minimize the capacity to reduce costs and reduce the dirt Pool deposition and corruption. Cistern volume includes dead volume and effective volume in two parts. Dead volume refers to the volume below the lowest water level, effective volume is the maximum water level in the pool and the lowest water level between the volume. According to drainage regulations, the effective volume of catch basin should meet the following requirements:
1) For the large-scale sewage pumping station which is running all day and night, the effective volume of the catchment shall be calculated by not less than the largest one pump in the pumping station. If the pump unit is automatic control, the large flow submerged pump shall not be operated every hour. More than 6 times; when the artificial management, the pump should not be more than 3 times per hour.
2) For small-sized sewage pumping stations, since nocturnal sewage flow is likely to stop operation at night, in this case, the sump volume must be able to store inflows during the night stop operation period.
3) for the factory sewage pumping station sump, but also should be based on a short period of time to review the volume of the shower drain.
4) Sewage pump The capacity of the pump pool shall be calculated according to the volume of sludge discharged once and the pumping capacity of the mud pump. The volume of the sludge pool of the activated sludge pump house shall be determined according to the volume of the returned sludge, the amount of surplus sludge and the capacity of pumping of the sludge pump.
5) With the pump control cabinet according to the pool level automatic control pump stops pumping station, you can use the catchment to the amount of water and pumping time for each pump to calculate the effective volume, the formula
Vm1n = TminQ / 4
Where Vmin - the minimum effective volume of cisterns (m3);
Tmin - pump minimum operating period (s);
Q - pump flow (m3 / s).
The maximum designed water level of the sewage pump station shall be calculated according to the filling degree of the inlet pipe. Design average water level should be used when the design of the average flow into the water level. The minimum designed water level of the sump shall meet the requirements of the suction head of the selected pump. Self-irrigation pump room should also meet the requirements of pump impeller immersion depth.
Set the volume of the pool to meet the hydraulic layout, grille and sewage pump suction pipe installation requirements, in a timely manner in the future water pumping and avoid frequent pump starting and shutting down on the basis of the pool to minimize the capacity to reduce costs and reduce the dirt Pool deposition and corruption. Cistern volume includes dead volume and effective volume in two parts. Dead volume refers to the volume below the lowest water level, effective volume is the maximum water level in the pool and the lowest water level between the volume. According to drainage regulations, the effective volume of catch basin should meet the following requirements:
1) For the large-scale sewage pumping station which is running all day and night, the effective volume of the catchment shall be calculated by not less than the largest one pump in the pumping station. If the pump unit is automatic control, the large flow submerged pump shall not be operated every hour. More than 6 times; when the artificial management, the pump should not be more than 3 times per hour.
2) For small-sized sewage pumping stations, since nocturnal sewage flow is likely to stop operation at night, in this case, the sump volume must be able to store inflows during the night stop operation period.
3) for the factory sewage pumping station sump, but also should be based on a short period of time to review the volume of the shower drain.
4) Sewage pump The capacity of the pump pool shall be calculated according to the volume of sludge discharged once and the pumping capacity of the mud pump. The volume of the sludge pool of the activated sludge pump house shall be determined according to the volume of the returned sludge, the amount of surplus sludge and the capacity of pumping of the sludge pump.
5) With the pump control cabinet according to the pool level automatic control pump stops pumping station, you can use the catchment to the amount of water and pumping time for each pump to calculate the effective volume, the formula
Vm1n = TminQ / 4
Where Vmin - the minimum effective volume of cisterns (m3);
Tmin - pump minimum operating period (s);
Q - pump flow (m3 / s).
The maximum designed water level of the sewage pump station shall be calculated according to the filling degree of the inlet pipe. Design average water level should be used when the design of the average flow into the water level. The minimum designed water level of the sump shall meet the requirements of the suction head of the selected pump. Self-irrigation pump room should also meet the requirements of pump impeller immersion depth.
The difference between single - stage deep well pump and multistage deep well pump
The difference between single - stage deep well pump and multistage deep well pump
1, single-stage deep-well pump is only one impeller deep-well pump, the maximum lift is only 125 meters;
2, multistage deep well pump is a pump with two or more impeller, the maximum lift can be more than 125 meters; multi-stage pump in the single stage pump head need to be equipped with two motor cases, you can increase the number of impellers To match the four motor, which can improve pump life and reduce the unit noise, but the multi-stage pump repair is relatively single-stage pump is difficult.
3, the actual needs of the pump head less than 125 meters, according to the pump area, pump prices (multi-stage pump is generally higher than the single-stage pump prices), and other factors considered the choice of single-stage pump or multi-stage pump.
With the advancement of technology, single-stage impeller pump can increase the pump speed to improve the pump head, can replace the multi-stage pump, but the price is a little expensive
1, single-stage deep-well pump is only one impeller deep-well pump, the maximum lift is only 125 meters;
2, multistage deep well pump is a pump with two or more impeller, the maximum lift can be more than 125 meters; multi-stage pump in the single stage pump head need to be equipped with two motor cases, you can increase the number of impellers To match the four motor, which can improve pump life and reduce the unit noise, but the multi-stage pump repair is relatively single-stage pump is difficult.
3, the actual needs of the pump head less than 125 meters, according to the pump area, pump prices (multi-stage pump is generally higher than the single-stage pump prices), and other factors considered the choice of single-stage pump or multi-stage pump.
With the advancement of technology, single-stage impeller pump can increase the pump speed to improve the pump head, can replace the multi-stage pump, but the price is a little expensive
The Future Development Way of Deep Well Pump Industry in China
With the use of deep well submersible pumps and the expansion of the field of application, well submersible pumps must adapt to more different environmental requirements. With the accumulation of market feedback data, cad, cfd and other computer-aided design, auxiliary manufacturing and the application of auxiliary testing software, and fluorine plastic, plastic lining, rubber lining, spraying ceramics and other new materials and new technology, Pump is gradually to the efficient, energy saving, environmental protection direction. details as follows:
(A) technological innovation will lead to new technology, new materials continue to use in the production of deep well pumps. For example, the traditional casting process advances to more advanced stainless steel stamping welding processes. The core components of the stainless steel stamping and welding multi-stage pump are stainless steel plate, stamping with mold, with the advantages of high reliability, good sealing, high precision, etc. Its hydraulic performance and pump efficiency are generally better than the submersible pump, 2. The stamping welding process of stainless steel is the trend of the future development of deep well pump.
(B) the design to a more efficient, energy saving, environmental protection direction. For example, oil-filled motor design to more environmentally friendly water-filled motor design and development. Oil-filled submersible motor cavity filled with mechanical oil, and water-filled submersible motor cavity filled with water medium, one of its advantages is zero water pollution, more environmentally friendly. In addition, with the frequency conversion technology in the motor design of the gradual popularization of the future wells with submersible pumps will be more efficient and energy saving.
(C) the overall design to the removable modular design direction, that is, motor and pump components such as modular combination to facilitate the demolition and replacement of damaged parts, to extend the service life of the pump, reducing the use of the cost of the purpose.
(A) technological innovation will lead to new technology, new materials continue to use in the production of deep well pumps. For example, the traditional casting process advances to more advanced stainless steel stamping welding processes. The core components of the stainless steel stamping and welding multi-stage pump are stainless steel plate, stamping with mold, with the advantages of high reliability, good sealing, high precision, etc. Its hydraulic performance and pump efficiency are generally better than the submersible pump, 2. The stamping welding process of stainless steel is the trend of the future development of deep well pump.
(B) the design to a more efficient, energy saving, environmental protection direction. For example, oil-filled motor design to more environmentally friendly water-filled motor design and development. Oil-filled submersible motor cavity filled with mechanical oil, and water-filled submersible motor cavity filled with water medium, one of its advantages is zero water pollution, more environmentally friendly. In addition, with the frequency conversion technology in the motor design of the gradual popularization of the future wells with submersible pumps will be more efficient and energy saving.
(C) the overall design to the removable modular design direction, that is, motor and pump components such as modular combination to facilitate the demolition and replacement of damaged parts, to extend the service life of the pump, reducing the use of the cost of the purpose.
The Main Problems of deep well Submersible Pump Industry
The Main Problems of deep well Submersible Pump Industry
(A) the overall level of technology industry than foreign advanced enterprises still exist in a certain gap
China's wells with a large number of manufacturers within the industry, the vast majority of small-scale production enterprises, extensive management, lack of R & D investment, technology and equipment is relatively backward, not the formation of economies of scale, poor product quality stability, anti-risk ability Strong. Can improve the production of deep well submersible pumps in China by the scale of production and sales, technical level and innovation ability to solve the problem.
(B) the upstream raw material price fluctuations and rising labor costs
In recent years, the prices of main raw materials such as enameled wires, silicon steel sheets and copper pieces required for the production of submersible pumps have fluctuated, and the labor costs have been rising. This has brought certain adverse effects on the development of the submersible pump industry. Can be improved through technology and large-scale production, and continuously reduce production costs, enhance market acceptance and brand awareness to solve.
(3) The rise of the RMB exchange rate has exerted pressure on exports
In recent years, the continued appreciation of the renminbi, to a certain extent, weakened the well of China's submersible pump export price advantage. Can continue to optimize their own to reduce production costs; increase product technology research and development, improve the technological content of products; actively participate in international competition in the market, increase in the international market share.
(A) the overall level of technology industry than foreign advanced enterprises still exist in a certain gap
China's wells with a large number of manufacturers within the industry, the vast majority of small-scale production enterprises, extensive management, lack of R & D investment, technology and equipment is relatively backward, not the formation of economies of scale, poor product quality stability, anti-risk ability Strong. Can improve the production of deep well submersible pumps in China by the scale of production and sales, technical level and innovation ability to solve the problem.
(B) the upstream raw material price fluctuations and rising labor costs
In recent years, the prices of main raw materials such as enameled wires, silicon steel sheets and copper pieces required for the production of submersible pumps have fluctuated, and the labor costs have been rising. This has brought certain adverse effects on the development of the submersible pump industry. Can be improved through technology and large-scale production, and continuously reduce production costs, enhance market acceptance and brand awareness to solve.
(3) The rise of the RMB exchange rate has exerted pressure on exports
In recent years, the continued appreciation of the renminbi, to a certain extent, weakened the well of China's submersible pump export price advantage. Can continue to optimize their own to reduce production costs; increase product technology research and development, improve the technological content of products; actively participate in international competition in the market, increase in the international market share.
Features of WQ submersible sewage pump motor cable
no plugging submersible sewage pump motor is different from the pipeline sewage pump or sewage pump motor, the cable and the media to direct contact, so the submersible sewage pump motor leads with a special processing. WQ submersible sewage pump long-term operation, the working environment is relatively poor, with the cable force and other artificial adverse factors, the cable will be accidentally damaged motor water, the cable after a special curing seal to eliminate the cable Damage and damage the pump hidden dangers, the main principle is: diving cable from the rubber outer sheath, filler and cable core composition, each cable core and by the inner rubber sheath and multi-strand cable copper wire, when the cable jacket Or the cable inside the foreskin is damaged, the medium water will follow the cable core and the outer sheath of the gap or cable core in the gap between the copper wire into the motor cavity, thereby burning the motor, the quality of cable paint can only decide to dive Pump overheating and overload protection, can not effectively prevent the water on the motor protection. Our company for the above phenomenon, the single-core cable after the tinning treatment after implantation of rubber, and then single-core cable into the rubber and then rubber ring seal, the use of vulcanized rubber watertight cable, the motor can sneak into the water .
Submersible sewage pump wholesale
Submersible sewage pump is a pump and motor Siamese, and at the same time into the liquid work under the pump products,
Impeller of the sewage pump structure used in the form of the impeller depends on what medium is the transmission medium, such as the transport of sewage can be used without clogging impeller series of non-clogging sewage pump, transmission of septic debris and more liquid can use open impeller WQK-type cutting device with submersible sewage pump, sewage pump impeller structure is divided into the following forms:
1, the impeller form of sewage pump single-channel impeller, double-channel impeller or three-channel impeller flow channel impeller (closed impeller or open impeller)
2, sewage pump impeller and open single-flow impeller and oblique flow impeller
3, non-clogging impeller can see the diving without blocking the sewage pump
The sewage pump can be installed above the liquid level or below the liquid level. Installed in the liquid sewage pump called the submersible sewage pump. The installation of the sewage pump can be horizontal or vertical.
Impeller of the sewage pump structure used in the form of the impeller depends on what medium is the transmission medium, such as the transport of sewage can be used without clogging impeller series of non-clogging sewage pump, transmission of septic debris and more liquid can use open impeller WQK-type cutting device with submersible sewage pump, sewage pump impeller structure is divided into the following forms:
1, the impeller form of sewage pump single-channel impeller, double-channel impeller or three-channel impeller flow channel impeller (closed impeller or open impeller)
2, sewage pump impeller and open single-flow impeller and oblique flow impeller
3, non-clogging impeller can see the diving without blocking the sewage pump
The sewage pump can be installed above the liquid level or below the liquid level. Installed in the liquid sewage pump called the submersible sewage pump. The installation of the sewage pump can be horizontal or vertical.
2017年1月21日星期六
How to choose hot water pump
How to choose hot water pump
First, select businesses. Pay attention to the agricultural sector recognized point of sale or store to buy, and ask for a formal invoice to avoid quality problems and helpless. After the business of the sale of additional services, must be signed with the contract or written on the invoice, or business greatly reduced.
Second, the election factory. To choose a large scale, good reputation, strong technical force, excellent quality of the manufacturers products. Purchase must be tested "three certificates" (agricultural machinery promotion permit, production license and product inspection certificate), in order to avoid the purchase of obsolete products and poor quality products, do not seek cheap, buy "three no" products Manufacturers, no production date, no production license).
Third, select the power phase. Phase pump, due to the same specifications single-phase pump compared with the three-phase pump, three-phase pump small size, light weight, low power consumption, low power consumption, Vibration, light, but also more economical.
Fourth, the election parameters. Select the focus of the submersible pump is to determine the pump flow and head and other parameters. Pump flow selection, with the water to the water and water consumption and family economic conditions to adapt. Users need to choose the best head and pump nameplate lift close to the use of the economy, efficiency can be achieved the highest. If the selected pump head is too small, low-lift pump for high-lift work, that is, "small horse cart", even if the Sheung Shui, water is also very small. At the same time, due to motor overload, if the long run, the motor temperature, the winding insulation layer will gradually aging, and even burn the motor; pump head is too high, high-lift pump for low lift work, "big horse car" There will be run-time traffic is too large, waste of energy and equipment resources.
Fifth, test quality. Submersible pump motor has a water-filled, oil-filled and shielded structure, generally the most widely used water-filled type. This water pump must be used before the two water-hole bolts all unscrewed, a water injection (no sand), the other air emissions, water and other static after about 15 minutes, so the motor cavity after all the air exhausted with water, Until the full water and then tighten the two water injection bolts, so that the motor is sealed. After the motor is filled with water, the windings work in the water, the insulation of the motor can be measured, the insulation resistance must be measured with a megohmmeter that can not be used with a multimeter, the range of the universal meter is limited, the insulation resistance between the winding and the earth Not clear. Insulation qualified, the pump test run test. When the condition is complete, fill the water in the motor, tighten the water injection bolts, the pump can be energized in the pool test run, but not long-term operation, unconditional idle time in the well, the time shall not exceed 5 minutes.
First, select businesses. Pay attention to the agricultural sector recognized point of sale or store to buy, and ask for a formal invoice to avoid quality problems and helpless. After the business of the sale of additional services, must be signed with the contract or written on the invoice, or business greatly reduced.
Second, the election factory. To choose a large scale, good reputation, strong technical force, excellent quality of the manufacturers products. Purchase must be tested "three certificates" (agricultural machinery promotion permit, production license and product inspection certificate), in order to avoid the purchase of obsolete products and poor quality products, do not seek cheap, buy "three no" products Manufacturers, no production date, no production license).
Third, select the power phase. Phase pump, due to the same specifications single-phase pump compared with the three-phase pump, three-phase pump small size, light weight, low power consumption, low power consumption, Vibration, light, but also more economical.
Fourth, the election parameters. Select the focus of the submersible pump is to determine the pump flow and head and other parameters. Pump flow selection, with the water to the water and water consumption and family economic conditions to adapt. Users need to choose the best head and pump nameplate lift close to the use of the economy, efficiency can be achieved the highest. If the selected pump head is too small, low-lift pump for high-lift work, that is, "small horse cart", even if the Sheung Shui, water is also very small. At the same time, due to motor overload, if the long run, the motor temperature, the winding insulation layer will gradually aging, and even burn the motor; pump head is too high, high-lift pump for low lift work, "big horse car" There will be run-time traffic is too large, waste of energy and equipment resources.
Fifth, test quality. Submersible pump motor has a water-filled, oil-filled and shielded structure, generally the most widely used water-filled type. This water pump must be used before the two water-hole bolts all unscrewed, a water injection (no sand), the other air emissions, water and other static after about 15 minutes, so the motor cavity after all the air exhausted with water, Until the full water and then tighten the two water injection bolts, so that the motor is sealed. After the motor is filled with water, the windings work in the water, the insulation of the motor can be measured, the insulation resistance must be measured with a megohmmeter that can not be used with a multimeter, the range of the universal meter is limited, the insulation resistance between the winding and the earth Not clear. Insulation qualified, the pump test run test. When the condition is complete, fill the water in the motor, tighten the water injection bolts, the pump can be energized in the pool test run, but not long-term operation, unconditional idle time in the well, the time shall not exceed 5 minutes.
Development trend of hot water pump
Development trend of hot water pump
1. The development of large and medium-sized submersible pump Large and medium-sized submersible pump with a simplified pump structure and save pumping station construction investment outstanding advantages, generally can reduce the cost of 40% to 60%, shorten the duration of 1/2 ~ 2/3. Therefore, it will be in the municipal, industrial and mining, environmental protection and industrial and agricultural water supply and drainage areas have been more widely used. It is expected that the future demand will be larger.
2. Development of multi-purpose multi-purpose submersible pump China's submersible pump in the form of well-known foreign submersible pump production plant products compared to not enough, such as with cutting device pumps, multi-stage pump, pumping corrosive medium submersible Pumps and other production is still very small, but its market demand and great, therefore, has a good development prospects.
3. Development of high-reliability mechanical seal Mechanical seal is a key part of submersible pump, the use of two single-ended mechanical seal, so that the media pressure can be applied to the end surface, the leakage direction for the flow pattern, which are favorable, but the structure is slightly complex . Double-end mechanical seal in the oil chamber, both sides of the end surface should be used in different structural types, the media pressure can be applied to the lower side of the end surface, or rely on the spring force, sealed end thrust easily open end. Therefore, it should be further in the structure and materials research, improve its reliability and life.
4. (F46), lined with plastic, rubber lining, spraying ceramics, all of these materials should be applied to the submersible pump as soon as possible, the expansion of hot water submersible pumps, the use of the new materials, new technology and new technology, Applications. The application of new technology and new technology such as computer aided design, auxiliary manufacturing and auxiliary testing is also imperative. Facts have proved that new technologies, new materials, new technology applications, not only the liberation of labor productivity, but also to ensure product quality is stable and reliable.
5. Attention to the quality of the appearance of hot water pump and gradually enter the international market China's submersible pumps in the international market has a clear price competitive advantage, but must pay attention to improve the reliability and life of the pump, in particular, to improve the appearance of submersible pump quality , To give users a sense of beauty, so that domestic-made submersible pump as early as more into the international market
1. The development of large and medium-sized submersible pump Large and medium-sized submersible pump with a simplified pump structure and save pumping station construction investment outstanding advantages, generally can reduce the cost of 40% to 60%, shorten the duration of 1/2 ~ 2/3. Therefore, it will be in the municipal, industrial and mining, environmental protection and industrial and agricultural water supply and drainage areas have been more widely used. It is expected that the future demand will be larger.
2. Development of multi-purpose multi-purpose submersible pump China's submersible pump in the form of well-known foreign submersible pump production plant products compared to not enough, such as with cutting device pumps, multi-stage pump, pumping corrosive medium submersible Pumps and other production is still very small, but its market demand and great, therefore, has a good development prospects.
3. Development of high-reliability mechanical seal Mechanical seal is a key part of submersible pump, the use of two single-ended mechanical seal, so that the media pressure can be applied to the end surface, the leakage direction for the flow pattern, which are favorable, but the structure is slightly complex . Double-end mechanical seal in the oil chamber, both sides of the end surface should be used in different structural types, the media pressure can be applied to the lower side of the end surface, or rely on the spring force, sealed end thrust easily open end. Therefore, it should be further in the structure and materials research, improve its reliability and life.
4. (F46), lined with plastic, rubber lining, spraying ceramics, all of these materials should be applied to the submersible pump as soon as possible, the expansion of hot water submersible pumps, the use of the new materials, new technology and new technology, Applications. The application of new technology and new technology such as computer aided design, auxiliary manufacturing and auxiliary testing is also imperative. Facts have proved that new technologies, new materials, new technology applications, not only the liberation of labor productivity, but also to ensure product quality is stable and reliable.
5. Attention to the quality of the appearance of hot water pump and gradually enter the international market China's submersible pumps in the international market has a clear price competitive advantage, but must pay attention to improve the reliability and life of the pump, in particular, to improve the appearance of submersible pump quality , To give users a sense of beauty, so that domestic-made submersible pump as early as more into the international market
Starting Method and Procedure of Mine Submersible Pump
Mining submersible pump start-up methods and steps which?
Mine submersible pump with bottom valve should first open the irrigation valve and the release valve, the pump irrigation, the pump body to know the air all the discharge, and then close the irrigation valve and release valve; if the end of the valve drain pump should be Start the vacuum pump or jet pump, mining submersible pump price pump body, suction tube to a certain degree of vacuum, in the stop. The use of positive pressure drainage, should first open the inlet valve, and then open the release valve, until the vent valve to see the water vent, close the release valve.
Start the motor
(1) Before starting high-voltage equipment must wear insulated gloves, wear insulated boots.
(2) Rat-type motor directly start, first close the power switch, the current reaches normal, open the pump outlet valve.
(3) Wound-type motor starts, the first slip of the motor slip ring to the starting position of the handle, starter handle in the stop position, close the power switch, to start the current gradually down, the gradual removal of starting resistance , So that the rotor short circuit, and the electric motor slip ring hit the running position, the use of electric motors hit the normal speed, mine will eventually pull the trigger lever stop position.
Mine submersible pump with bottom valve should first open the irrigation valve and the release valve, the pump irrigation, the pump body to know the air all the discharge, and then close the irrigation valve and release valve; if the end of the valve drain pump should be Start the vacuum pump or jet pump, mining submersible pump price pump body, suction tube to a certain degree of vacuum, in the stop. The use of positive pressure drainage, should first open the inlet valve, and then open the release valve, until the vent valve to see the water vent, close the release valve.
Start the motor
(1) Before starting high-voltage equipment must wear insulated gloves, wear insulated boots.
(2) Rat-type motor directly start, first close the power switch, the current reaches normal, open the pump outlet valve.
(3) Wound-type motor starts, the first slip of the motor slip ring to the starting position of the handle, starter handle in the stop position, close the power switch, to start the current gradually down, the gradual removal of starting resistance , So that the rotor short circuit, and the electric motor slip ring hit the running position, the use of electric motors hit the normal speed, mine will eventually pull the trigger lever stop position.
High-lift submersible pump manufacturers procurement knowledge
High-lift submersible pump manufacturers procurement knowledge
High lift submersible pump is the most widely used pumps in various fields: irrigation, sewage, industrial sewage treatment, only we understand the scope of application of high-lift submersible pump manufacturers, high-lift submersible pump manufacturers characteristics and maintenance of common sense, Of the high-lift submersible pump manufacturers to allow you to create higher efficiency.
High-lift submersible pump manufacturers in the self-priming high-lift submersible pump manufacturers structure and performance, drawing on the advantages of similar products at home and abroad, and many users to absorb the requirements of the use and improvement of advice provided by the development of self- And sewage in one, you can like the general self-priming pump as a self-priming pump without the end of the valve, without lead irrigation, but also with large pieces of pumping solid blocks, filaments of dirt, sediment, waste ore impurities, High-head submersible pump manufacturers can be divided into self-priming high-lift submersible pump manufacturers, liquid high-lift submersible pump manufacturers, with a knife-type high-lift diving Pump manufacturers and automatic mixing high-lift submersible pump manufacturers. It is widely used in the fields of mine, papermaking, printing and dyeing, environmental protection, oil refining, petroleum, chemical industry, farm, dyeing and printing, and so on, because it has the characteristics of transporting liquid containing hard solid and fibrous material and especially dirty, sticky and slippery liquid. Mud, quicksand, mud pond, sewage pond, the sewage to send thick liquid suction, loading and suspended matter in the sewage treatment.In this paper, the research and development of the sewage treatment plant,
High-lift submersible pump manufacturers selection and maintenance: for high-lift submersible pump manufacturers, the most critical issue is the reliability of the problem, because the need to transport the media is a mixture of solid materials containing some of the liquid, the problem makes high-lift submersible pump manufacturers Sealing, motor bearing capacity, bearing layout and selection requirements than the average pump to high, so in the selection, we must understand clearly the high-lift submersible pump manufacturers sealing reliability and load carrying capacity.
High lift submersible pump is the most widely used pumps in various fields: irrigation, sewage, industrial sewage treatment, only we understand the scope of application of high-lift submersible pump manufacturers, high-lift submersible pump manufacturers characteristics and maintenance of common sense, Of the high-lift submersible pump manufacturers to allow you to create higher efficiency.
High-lift submersible pump manufacturers in the self-priming high-lift submersible pump manufacturers structure and performance, drawing on the advantages of similar products at home and abroad, and many users to absorb the requirements of the use and improvement of advice provided by the development of self- And sewage in one, you can like the general self-priming pump as a self-priming pump without the end of the valve, without lead irrigation, but also with large pieces of pumping solid blocks, filaments of dirt, sediment, waste ore impurities, High-head submersible pump manufacturers can be divided into self-priming high-lift submersible pump manufacturers, liquid high-lift submersible pump manufacturers, with a knife-type high-lift diving Pump manufacturers and automatic mixing high-lift submersible pump manufacturers. It is widely used in the fields of mine, papermaking, printing and dyeing, environmental protection, oil refining, petroleum, chemical industry, farm, dyeing and printing, and so on, because it has the characteristics of transporting liquid containing hard solid and fibrous material and especially dirty, sticky and slippery liquid. Mud, quicksand, mud pond, sewage pond, the sewage to send thick liquid suction, loading and suspended matter in the sewage treatment.In this paper, the research and development of the sewage treatment plant,
High-lift submersible pump manufacturers selection and maintenance: for high-lift submersible pump manufacturers, the most critical issue is the reliability of the problem, because the need to transport the media is a mixture of solid materials containing some of the liquid, the problem makes high-lift submersible pump manufacturers Sealing, motor bearing capacity, bearing layout and selection requirements than the average pump to high, so in the selection, we must understand clearly the high-lift submersible pump manufacturers sealing reliability and load carrying capacity.
2017年1月20日星期五
Submersible Pump bearing temperature is too high causes
Deep well submersible pump bearing temperature rise too high main reason: (at this time as long as the observation, timely identify the cause, the treatment is not difficult)
(1) deep shaft submersible pump shaft bending or different heart, will pump vibration, causing bearing heat or wear.
(2) due to increased axial thrust (such as the balance plate and balance ring in the pump when the damage), so that bearing axial load increased, resulting in bearing heat or damage.
(3) bearing lubricating oil (grease) is insufficient or too much, of poor quality, there are sediment, iron debris and other debris; sliding bearings sometimes oil ring does not rotate, with oil on the bearing caused by heat.
(4) bearing with the gap does not meet the requirements. Such as bearing inner ring and water pump shaft, bearing outer ring and bearing body, with too loose or too tight, can cause bearing heat. (With too tight will make the bearing rotation is not flexible; with too loose, will rotate the bearing inner ring or the bearing in the bearing body rotation).
(5) deep well submersible pump rotor static balance is not good. Pump rotor radial force increases, the bearing load increases, resulting in bearing heat.
(6) deep well submersible pump in the non-design point of operation to produce vibration, but also make the pump bearing heat.
(7) Bearing damage (including the purchase of the bearing itself quality problems), often more common causes of bearing heat, such as the rolling bearing cage damage, ball crushed inner or outer ring fracture; sliding bearing alloy layer peeling, Out blocks and so on. This situation bearing abnormal sound, noise, should be opened in time to check and replace the bearing.
(1) deep shaft submersible pump shaft bending or different heart, will pump vibration, causing bearing heat or wear.
(2) due to increased axial thrust (such as the balance plate and balance ring in the pump when the damage), so that bearing axial load increased, resulting in bearing heat or damage.
(3) bearing lubricating oil (grease) is insufficient or too much, of poor quality, there are sediment, iron debris and other debris; sliding bearings sometimes oil ring does not rotate, with oil on the bearing caused by heat.
(4) bearing with the gap does not meet the requirements. Such as bearing inner ring and water pump shaft, bearing outer ring and bearing body, with too loose or too tight, can cause bearing heat. (With too tight will make the bearing rotation is not flexible; with too loose, will rotate the bearing inner ring or the bearing in the bearing body rotation).
(5) deep well submersible pump rotor static balance is not good. Pump rotor radial force increases, the bearing load increases, resulting in bearing heat.
(6) deep well submersible pump in the non-design point of operation to produce vibration, but also make the pump bearing heat.
(7) Bearing damage (including the purchase of the bearing itself quality problems), often more common causes of bearing heat, such as the rolling bearing cage damage, ball crushed inner or outer ring fracture; sliding bearing alloy layer peeling, Out blocks and so on. This situation bearing abnormal sound, noise, should be opened in time to check and replace the bearing.
15 points in the use of submersible pumps Note
1 WQ submersible sewage pump, JYWQ, JPWQ automatic mixing and submerged sewage pump, AS with automatic cutting submersible sewage pump, QJ deep well submersible pump depth is generally 0.5 ~ 3m, in the water, the vertical lifting, not horizontal Lying, but can not be trapped in the mud.
2 In operation, such as a significant reduction in water, the motor suddenly stopped or abnormal sound to be pumping to check, you must first cut off the power.
3 If the ground is bad, found that the switch, unit or circuit leakage phenomenon, should quickly cut off the power, check the deal.
4 can not be extracted with large amounts of sediment water, especially the use of mechanical seal submersible pump.
5 "open" and "stop" should not be too frequent. Shutdown interval 3-5 minutes after the start.
7 run-time, is strictly prohibited in the wells out of the pool to wash things, wet hands, barefoot not open, off the electrical switch to prevent leakage of the pump.
8 Power supply should be selected according to regulations. If the power supply and water pump far apart, the cable cross-sectional area should be increased, the connector should be as small as possible to ensure that the normal use of the voltage between 342-418V. In order to ensure safety, in the vicinity of the power supply or water pump buried in a dormant more than 1 m iron bar as a ground.
9 can not be dehydrated. If the test machine on the land, the running time shall not exceed 5min. In the pumping process, if the water level declining, be careful not to let the submersible pump running out of the water surface.
10 after the boot, if the pump impeller reverse lead to less water or no water, should be immediately shut down, switch the three-phase core cable in any two-phase wiring can make it out of the water.
11 submersible pump into the water or raised the surface, you must pull the ear rope on the climb, absolutely can not pull the cable.
12 Do not immerse in water for long periods of time, and hang them in a dry and ventilated room.
13 integral sealed box is a key seal components of submersible pump, its good or bad a direct impact on the normal operation of the motor. Submersible pump running 50 h later, it should be put on the ground for inspection.
14 After 1 year of use, the submersible pump should be a comprehensive inspection of the rust and paint rust. 1-2 years later, a large inspection, open all parts for maintenance, scrub, descaling rust, and then re-assembled.
15 after shutdown, the tube must wait for the return of water after the completion of the start. If the water still can not be started after the start, should identify the cause
2 In operation, such as a significant reduction in water, the motor suddenly stopped or abnormal sound to be pumping to check, you must first cut off the power.
3 If the ground is bad, found that the switch, unit or circuit leakage phenomenon, should quickly cut off the power, check the deal.
4 can not be extracted with large amounts of sediment water, especially the use of mechanical seal submersible pump.
5 "open" and "stop" should not be too frequent. Shutdown interval 3-5 minutes after the start.
7 run-time, is strictly prohibited in the wells out of the pool to wash things, wet hands, barefoot not open, off the electrical switch to prevent leakage of the pump.
8 Power supply should be selected according to regulations. If the power supply and water pump far apart, the cable cross-sectional area should be increased, the connector should be as small as possible to ensure that the normal use of the voltage between 342-418V. In order to ensure safety, in the vicinity of the power supply or water pump buried in a dormant more than 1 m iron bar as a ground.
9 can not be dehydrated. If the test machine on the land, the running time shall not exceed 5min. In the pumping process, if the water level declining, be careful not to let the submersible pump running out of the water surface.
10 after the boot, if the pump impeller reverse lead to less water or no water, should be immediately shut down, switch the three-phase core cable in any two-phase wiring can make it out of the water.
11 submersible pump into the water or raised the surface, you must pull the ear rope on the climb, absolutely can not pull the cable.
12 Do not immerse in water for long periods of time, and hang them in a dry and ventilated room.
13 integral sealed box is a key seal components of submersible pump, its good or bad a direct impact on the normal operation of the motor. Submersible pump running 50 h later, it should be put on the ground for inspection.
14 After 1 year of use, the submersible pump should be a comprehensive inspection of the rust and paint rust. 1-2 years later, a large inspection, open all parts for maintenance, scrub, descaling rust, and then re-assembled.
15 after shutdown, the tube must wait for the return of water after the completion of the start. If the water still can not be started after the start, should identify the cause
Deep well pump assembly should meet the following requirements
First, the assembly of pumps, water pipes, shaft, the connection should be tightened gradually into the well, to prevent the pieces and tools fall into the well, submersible pump cable should be tied to the water pipe;
Second, the threaded connection of the water pipe connected to each other, should be added oil, should not be filled with linen, lead oil; tube end surface should be fitted with bearing bracket (long shaft deep well pump) or direct fit, The depth of the tube should be equal; flange connection of the water pipe, the flange face should be added between the gasket;
Third. If the well pipe is slightly skewed, the pump seat should be correspondingly skewed (do not simply correct the level of the pump seat); the gap between the pump base and the foundation should be Wedge iron filling.
Fourth, the long axis of deep well pump should still meet the following requirements:
1. When the drive shafts are connected with each other, the two shaft end faces shall be fitted together, and the depths of the shafts screwed into the couplings shall be equal;
2. Motor and pump seat should be close fit, during which no padding, such as the motor shaft and the motor shaft is not the same axis, should be in the pump seat and the base of the ramp plus horn adjustment.
Fifth, deep well Submersible pump should still meet the following requirements:
1. Pump and motor assembly, the motor should be filled with water to the submerged motor filled with clean water;
2. The depth of the unit into the water should not exceed 70 meters, such as must be more than 70 meters, should the motor stator windings, cables and fittings for water pressure test.
Second, the threaded connection of the water pipe connected to each other, should be added oil, should not be filled with linen, lead oil; tube end surface should be fitted with bearing bracket (long shaft deep well pump) or direct fit, The depth of the tube should be equal; flange connection of the water pipe, the flange face should be added between the gasket;
Third. If the well pipe is slightly skewed, the pump seat should be correspondingly skewed (do not simply correct the level of the pump seat); the gap between the pump base and the foundation should be Wedge iron filling.
Fourth, the long axis of deep well pump should still meet the following requirements:
1. When the drive shafts are connected with each other, the two shaft end faces shall be fitted together, and the depths of the shafts screwed into the couplings shall be equal;
2. Motor and pump seat should be close fit, during which no padding, such as the motor shaft and the motor shaft is not the same axis, should be in the pump seat and the base of the ramp plus horn adjustment.
Fifth, deep well Submersible pump should still meet the following requirements:
1. Pump and motor assembly, the motor should be filled with water to the submerged motor filled with clean water;
2. The depth of the unit into the water should not exceed 70 meters, such as must be more than 70 meters, should the motor stator windings, cables and fittings for water pressure test.
Reason and Elimination Method of Start - up Tripping of Deep Well Submersible Pump
Deep well submersible pump starting or running current, or even trip
cause:
1, power failure, power shortage.
2, the power cord is too long too small, the pressure drop is too large or the supply voltage is too low.
3, contactor damage or thermal relay trip. (Fault red light).
4, the power cord into the motor line, automatic box within a break or loose into the line phase.
5, the motor has been damaged.
6, the pump has a foreign body card machine.
Method of exclusion:
1, check the power supply, excluding phase.
2, increase the cable, improve the supply voltage.
3, check or replace the contactor, thermal relay to be manually reset after cooling.
4, check the line is good.
5, check the motor or replacement.
6, clean up foreign body.
cause:
1, power failure, power shortage.
2, the power cord is too long too small, the pressure drop is too large or the supply voltage is too low.
3, contactor damage or thermal relay trip. (Fault red light).
4, the power cord into the motor line, automatic box within a break or loose into the line phase.
5, the motor has been damaged.
6, the pump has a foreign body card machine.
Method of exclusion:
1, check the power supply, excluding phase.
2, increase the cable, improve the supply voltage.
3, check or replace the contactor, thermal relay to be manually reset after cooling.
4, check the line is good.
5, check the motor or replacement.
6, clean up foreign body.
QSP fountain submersible pump
QSP fountain submersible pump manufactured by Zhengzhou Shenlong Pump Industry Co., Ltd is widely used for farm irrigation, sprinkler irrigation, industrial and civil building water supply and drainage system, water diversion in hilly and mountain areas, drainage in low-lying areas, water supply and drainage of urban and rural industrial and mining enterprises and other various water conservancy facilities.
The features of QSP fountain submersible pump is that motor and pump are assembled into one with simple structure and environmental protection, which covers an small area and is convenient for installation and disassembly and simple to use and repair, safely and reliably.
Use conditions of QSP fountain submersible pump:
1. Power source: three-phase alternating-current supply with 50Hz of frequency and 380V of voltage. The pump should be safe to run in the water and diving depth should be no more than 5 meters.
2. Water source: clean water without corrosion and sediment concentration should be no more than 0.02%.
3. PH value: 6.5-8.5; water temperature is no more than 40℃.
Fill water with pump chamber before using it. It is prohibited to run without water.
Our company warmly welcome customers to purchase!
How to improve the self-suction capacity of non-clogging sewage pump
Here are several methods to improve the self-suction capacity of non-clogging sewage pump:
Method one: set vacuum pump on the suction piping of water pump. Start the vacuum pump before starting the water pump to make the suction piping full of water and ensure the water pump starts automatically and quickly.
Method two: reduce the bending, drop height and horizontal spacing of suction piping of non-clogging sewage pump.
Method three: set pump suction tank. Set a water tank on the suction piping of water pump and the tank should be filled with water before the first operation.
Method four: install suction bottom valve at the end of suction piping of sewage pump. Suction bottom valve is actually a kind of check valve, which will ensure water flows into the suction piping through water tank without backflow. It can ensure water pump starts automatically and quickly.
2017年1月19日星期四
Model selection factors of submersible sewage pump
Submersible sewage pump is the pump product runs under the liquid, which plays an important role in municipal engineering, industry, hospital, construction, restaurant and water conservancy construction. Due to lack of related technical knowledge and guidance of professional personage, customers often cannot purchase proper submersible sewage pump. Thus, it is important to know the factors when select a submersible pump.
1. Head:
Vertical height, horizontal distance, elbow and other factors can affect the head of submersible pump. Under the normal condition, head of submersible sewage pump selected should be within 20% of head needed.
2. Flow:
Rainstorm, typhoon, etc should be considered when select the submersible pump. The design flow must meet the requirement of special circumstances, and generally, main pump and auxiliary pump are needed.
3. Size and method:
The size of pump body and elbow of WQ submersible sewage pump is generally large and size of sewage pump should be fully considered. Submersible pump is commonly installed with mobile installation and coupling installation. Mobile installation is relatively simple, which just puts the pump into the sewage sump by hanging from a rope; coupling installation is relatively complex, which can be done under the guidance of the manufacturer.
4. Supply voltage:
The voltage of motor with three-phase power supply is 380V and the voltage of motor with single-phase power supply is 220V. 220V single-phase sewage pump is mainly for civilian use, industrial enterprise generally select 380V three-phase submersible sewage pump and mining enterprise generally select660V/ 1140V explosion-proof submersible sewage pump.
Reasons for motor burnout of submersible sewage pump
Pump body and motor of submersible sewage pump is integrated. Before leaving the factory, our company will test the products and ensure the quality of the product. For the motor burnout situations, the common reasons are as follows:
1. There is something wrong of pump installation.
Installer does not lower the water pump with TAB on the pump, but by pulling the cable. Submersible sewage pump is totally closed, thus, if pulling the cable, seal of cable will be damaged and water will be into the pump body and finally burn out the motor.
2. There are many foreign particles or fibers and sundries.
Submersible sewage pump is used to pump and deliver sewage and cannot deliver silt and sundries, for silt and sundries will clogged pump body and burn out the motor.
3. The pump is idling.
Submersible sewage pump is cooled by liquid. If the liquid level of tank is lower than two thirds of pump body, the pump will be burned out due to high temperature of pump body.
4. Super current.
The super current at pump usage process will burn out the motor. The common super current situations are: the actual head is too larger or smaller than that of selected model, concentration of liquid is too large and three-phase current is imbalance.
Waterproof mechanism of submersible water pump
Submersible water pump is composed of pump body, submersible motor (including cable), delivery pipe and control switch. Submersible water pump is the single-suction multi-stage vertical centrifugal pump; submersible motor is the three-phase asynchronous motor equipped with different specifications of three-core cable; starting device is made up of air switch and auto voltage reducing starter; delivery pipe is made of steel tube with different diameters, which are connected by flange; high-head pump is controlled by sluice valve.
Sediment control device and framework oil seal are equipped at the upper submersible motor to prevent sand flow into the motor. Water lubrication bearing is adopted by submersible motor and rubber regulator film and pressure adjusting spring are installed at the lower part of the motor to form surge chamber and adjust pressure change caused by temperature; polyethylene is used by motor winding to insulate.
Each stage of diversion shell of submersible water pump is equipped with a rubber bearing; impeller is fixed on the pump shaft with vertebral taper sleeve; diversion shell is connected with thread or bolt. Check valve is installed on the upper part of high-head submersible water pump to avoid water hammer damaging the machine. There is a water injection hole and air-bleed hole at the upper part of the motor and an outlet hole at the lower part of the motor.
Operating maintenance of sewage pump
Sewage pump can be divided into dry sewage pump and submersible sewage pump, the difference of which is if the pump need be put into the water.
Operating maintenance of dry sewage pump
① Check and calibrate pressure gauge and vacuum gauge annually and check pipelines and connection fittings at the same time.
② Temperature of bearings of pump and motor should be no more than the maximum temperature allowed.
③ In the operating process, pay attention to motor current value at any time. If find there is vibration and noise, stop the pump and repair it.
④ Check foundation bolts of coupling and machine regularly.
Operating maintenance of submersible pump
① Before starting the pump, check if the impeller rotates flexibly and if the oil chamber has oil. Rotate direction should be correct after electrify.
② Check if the cable is damaged or broken and if the inlet seal of connector cable is complete.
③ It is prohibited to use cable as messenger wire to avoid causing accident.
④ Check resistance insulation of motor regularly, which should be no less than specified value and check if pump grounding is reliable at the same time.
⑤ Submersible sewage pump should be run into the clear water for a few minutes after stop using.
⑥ Seal between impeller and pump body should not be damaged and clearance should be no more than specified value or change sealing ring.
⑦ After running for half a year, sealing condition of oil chamber should be always checked. If there is any abnormal conditions, change it timely.
⑧ Do not remove pump parts casually and do not beat parts if need remove the parts to avoid damaging seal parts.
Advantages of non-clogging sewage pump
Non-clogging sewage pump is composed of pump body, impeller, rear cover, mechanical seal, pump shaft, bearing pedestal, inlet valve, gas-liquid separation tube, pipeline, etc.
Non-clogging sewage pump manufactured by Shanghai Weihu Pump Industry Co., Ltd is pump body and motor integrated and operates under the water. Compared with general horizontal pump or vertical pump, non-clogging sewage pump has the following advantages:
1. Structure of non-clogging sewage pump is compact and covers a small area. It can be installed in the sewage tank for it operates under the water, no special sewage pump station need, which can save a large amount of land and cost.
2. It is easy to install and repair. Small sewage pump can be installed freely and large sewage pump is equipped with automatic coupling device to install automatically.
3. Continuous operation time is long.
4. There is no cavitation problem.
5. Vibration and noise are small, temperature of motor is low and it is no pollution for environment.
We warmly welcome customers to visit and purchase our pump products!
Application and Characteristics of Horizontal Deep Well Pump
Application and Characteristics of Horizontal Deep Well Pump
QJ-type Deep Well submersible pump is designed in accordance with national standards of energy-saving products, widely used in farmland irrigation, industrial and mining enterprises for the drainage and plateau, mountain people, livestock water.
The pump is composed of QJ submersible pump and YQS submersible submersible motor to work together. With the simple structure, small size, light weight, installation, easy maintenance, safe, reliable, energy efficient and so on.
QJR series of wells with heat-resistant submersible pumps with well-heat diving three-phase asynchronous motor directly linked into one, assembled into a heat-resistant submersible pump, heat water temperature up to 100 ° C, is to sneak into the extraction of geothermal Water, the effective equipment; geothermal is one of the cheapest, most clean, inexhaustible latest energy, now widely used in heating, medical, bathing, farming, farming, industrial and agricultural enterprises, entertainment services, health facilities and many other aspect. It has a pump-one, simple structure, reliable operation, no noise, good performance, high efficiency unit, easy installation and maintenance; and heat-resistant, anti-aging, anti-aging and many other advantages, is the embankment to take the latest products. species
1, vertical vertical use, such as in the general wells;
2, oblique use, such as the slope in the mine roadway;
3, horizontal use, such as the use of the pool
QJ-type Deep Well submersible pump is designed in accordance with national standards of energy-saving products, widely used in farmland irrigation, industrial and mining enterprises for the drainage and plateau, mountain people, livestock water.
The pump is composed of QJ submersible pump and YQS submersible submersible motor to work together. With the simple structure, small size, light weight, installation, easy maintenance, safe, reliable, energy efficient and so on.
QJR series of wells with heat-resistant submersible pumps with well-heat diving three-phase asynchronous motor directly linked into one, assembled into a heat-resistant submersible pump, heat water temperature up to 100 ° C, is to sneak into the extraction of geothermal Water, the effective equipment; geothermal is one of the cheapest, most clean, inexhaustible latest energy, now widely used in heating, medical, bathing, farming, farming, industrial and agricultural enterprises, entertainment services, health facilities and many other aspect. It has a pump-one, simple structure, reliable operation, no noise, good performance, high efficiency unit, easy installation and maintenance; and heat-resistant, anti-aging, anti-aging and many other advantages, is the embankment to take the latest products. species
1, vertical vertical use, such as in the general wells;
2, oblique use, such as the slope in the mine roadway;
3, horizontal use, such as the use of the pool
Balance of Axial Force in Deep Well Pumps in Production Practice
Balance of Axial Force in Deep Well Pumps in Production Practice
In the production practice, the axial force of the Deep Well Pump is objectively exist, especially high-lift deep-well pump, if the design, operation properly, excessive axial force will lead to bearing burn, shaft damage or broken shaft and so on.In many The problem of excessive axial force, its seriousness has exceeded the efficiency, wear and other factors arising from the problem, a deep-well pump can be safe and stable operation of the decisive factor [19 |. Now on the deep-well pump The development of the axial force balance device is described as follows: Kwan, who put forward a new deep shaft axial force device, the balancing device will be a pair of dynamic and static friction pair installed in the final impeller, the new balance shaft seal device both Balanced axial force, and basically no leakage.Use this device after the pump is reliable, energy-saving effect is significant.Lu Weigang and so on, "a kind of impeller axial balance of its own multi-stage centrifugal pump, impeller inlet seal structure in the end On the basis of the impeller front cover area is greater than the impeller rear cover area, impeller front cover outer diameter and the guide shell with the gap fit, impeller inlet end seal is made to withstand the small axial force Thrust bearing, so as to achieve the effect of completely balancing the axial force by the impeller itself, completely solve the problem of axial force destruction, and can also reduce the production cost of the pump.According to changing the geometric size of the impeller back blade, A kind of balance drum combination device is proposed.The principle of the balance drum is the same as the principle of the balance disc.A combination of the balance drum and the balance disc is put forward.The design of a double- Balance wheel floating impeller balancing device for achieving automatic balance of axial force.
In addition, with the development of computer technology, the application of CFD in fluid machinery is gradually becoming mature. The performance prediction and optimization design of pump based on CFD has basically reached the practical level of engineering, and the calculation of axial force has been involved. Numerical simulation of the internal flow field of the submersible pump is carried out, and the axial force distribution and the axial force calculation and equilibrium analysis are obtained, so the axial force is calculated by numerical simulation and the new equilibrium axial Force method is an effective method for future research.
In the production practice, the axial force of the Deep Well Pump is objectively exist, especially high-lift deep-well pump, if the design, operation properly, excessive axial force will lead to bearing burn, shaft damage or broken shaft and so on.In many The problem of excessive axial force, its seriousness has exceeded the efficiency, wear and other factors arising from the problem, a deep-well pump can be safe and stable operation of the decisive factor [19 |. Now on the deep-well pump The development of the axial force balance device is described as follows: Kwan, who put forward a new deep shaft axial force device, the balancing device will be a pair of dynamic and static friction pair installed in the final impeller, the new balance shaft seal device both Balanced axial force, and basically no leakage.Use this device after the pump is reliable, energy-saving effect is significant.Lu Weigang and so on, "a kind of impeller axial balance of its own multi-stage centrifugal pump, impeller inlet seal structure in the end On the basis of the impeller front cover area is greater than the impeller rear cover area, impeller front cover outer diameter and the guide shell with the gap fit, impeller inlet end seal is made to withstand the small axial force Thrust bearing, so as to achieve the effect of completely balancing the axial force by the impeller itself, completely solve the problem of axial force destruction, and can also reduce the production cost of the pump.According to changing the geometric size of the impeller back blade, A kind of balance drum combination device is proposed.The principle of the balance drum is the same as the principle of the balance disc.A combination of the balance drum and the balance disc is put forward.The design of a double- Balance wheel floating impeller balancing device for achieving automatic balance of axial force.
In addition, with the development of computer technology, the application of CFD in fluid machinery is gradually becoming mature. The performance prediction and optimization design of pump based on CFD has basically reached the practical level of engineering, and the calculation of axial force has been involved. Numerical simulation of the internal flow field of the submersible pump is carried out, and the axial force distribution and the axial force calculation and equilibrium analysis are obtained, so the axial force is calculated by numerical simulation and the new equilibrium axial Force method is an effective method for future research.
Cavitation Phenomenon of Deep Well Submersible Pump
Cavitation Phenomenon of Deep Well Submersible Pump
Liquid at a certain temperature, reduce the pressure to the temperature of the vaporization pressure, the liquid will produce bubbles. This phenomenon of bubble generation is called cavitation. Cavitation bubbles generated when the flow to the high pressure, the volume decreased so as to burst. This phenomenon is called cavitation collapse due to the pressure rise bubbles disappear in the liquid.
In the operation of the pump, if the partial pressure of the pumped liquid is reduced to the liquid vaporization pressure at the present temperature if the local area of the overcurrent portion (usually somewhere later than the impeller blade inlet) is for some reason, A large amount of steam is generated and bubbles are formed. When the liquid containing a large amount of bubbles moves forward through the high pressure region in the impeller, the high pressure liquid around the bubble causes the bubble to sharply shrink and break. At the same time as the condensation of the bubble bursts, the liquid particles fill the holes at a high velocity, which produces a very strong water hammer at this moment and strikes the metal surface with a high impact frequency, the impact stress can reach several hundred to several thousand Atmospheric pressure, impact frequency up to tens of thousands of times per second, will be serious wall thickness breakdown.
In the pump in the bubble and bubble burst to flow components suffered damage to the process is the water pump cavitation process. Pump after the cavitation in addition to the flow components will have a damaging effect, but also produce noise and vibration, and lead to decreased pump performance, serious liquid will interrupt the pump can not work properly
Liquid at a certain temperature, reduce the pressure to the temperature of the vaporization pressure, the liquid will produce bubbles. This phenomenon of bubble generation is called cavitation. Cavitation bubbles generated when the flow to the high pressure, the volume decreased so as to burst. This phenomenon is called cavitation collapse due to the pressure rise bubbles disappear in the liquid.
In the operation of the pump, if the partial pressure of the pumped liquid is reduced to the liquid vaporization pressure at the present temperature if the local area of the overcurrent portion (usually somewhere later than the impeller blade inlet) is for some reason, A large amount of steam is generated and bubbles are formed. When the liquid containing a large amount of bubbles moves forward through the high pressure region in the impeller, the high pressure liquid around the bubble causes the bubble to sharply shrink and break. At the same time as the condensation of the bubble bursts, the liquid particles fill the holes at a high velocity, which produces a very strong water hammer at this moment and strikes the metal surface with a high impact frequency, the impact stress can reach several hundred to several thousand Atmospheric pressure, impact frequency up to tens of thousands of times per second, will be serious wall thickness breakdown.
In the pump in the bubble and bubble burst to flow components suffered damage to the process is the water pump cavitation process. Pump after the cavitation in addition to the flow components will have a damaging effect, but also produce noise and vibration, and lead to decreased pump performance, serious liquid will interrupt the pump can not work properly
Pumping Operation and Pump Shutdown of Deep Well Submersible Pump
1, deep well submersible pump open pump operation:
Open the vent valve before opening, and then shut, start the exit valve should not be closed, can be opened a little, to be opened immediately after the start, control to the appropriate location, after the smooth running of the submersible pump to open the pressure gauge valve; When the submersible pump is running, observe whether the indication of the ammeter and the voltmeter has significant changes, whether the operation is noisy, the normal working current should not be greater than the rated value specified on the motor nameplate; the pump should be used within the prescribed flow range, Should not be too large, too large or too small should be appropriate to adjust the opening of the outlet valve; one of the following circumstances should immediately stop running, the pump does not change the working state, the voltage is rated current exceeds the rated pump intermittent water, Yang tube has a significant vibration, the issue of bang noise, frequent tripping protection switch.
2, deep well submersible pump stop pump:
Stop the deep well submersible pump running, close the outlet valve and the pressure gauge valve; water pump stop, in order to reduce the water flow back, should cut off the circuit, close the valve; if restart, must stop after 5min or longer.
Open the vent valve before opening, and then shut, start the exit valve should not be closed, can be opened a little, to be opened immediately after the start, control to the appropriate location, after the smooth running of the submersible pump to open the pressure gauge valve; When the submersible pump is running, observe whether the indication of the ammeter and the voltmeter has significant changes, whether the operation is noisy, the normal working current should not be greater than the rated value specified on the motor nameplate; the pump should be used within the prescribed flow range, Should not be too large, too large or too small should be appropriate to adjust the opening of the outlet valve; one of the following circumstances should immediately stop running, the pump does not change the working state, the voltage is rated current exceeds the rated pump intermittent water, Yang tube has a significant vibration, the issue of bang noise, frequent tripping protection switch.
2, deep well submersible pump stop pump:
Stop the deep well submersible pump running, close the outlet valve and the pressure gauge valve; water pump stop, in order to reduce the water flow back, should cut off the circuit, close the valve; if restart, must stop after 5min or longer.
订阅：
评论 (Atom)