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.