Diving sewage pump is a pump and motor Siamese, and at the same time into the liquid under the pump products, compared with the general horizontal pump or vertical sewage pump, submersible sewage pump has obvious the following aspects of the advantages:
1. Compact structure, small footprint. Diving sewage pump submerged as a result of submerged work, it can be installed directly in the sewage pool, without the need to build a dedicated pump room to install pumps and machines, you can save a lot of land and infrastructure costs.
2. Easy installation and maintenance. Small submersible sewage pump can be free to install, large submersible sewage pump are generally equipped with automatic coupling device can be installed automatically, installation and maintenance is very convenient.
3. Continuous running for a long time. Diving sewage pump due to pump and motor coaxial, shaft short, rotating parts of light weight, so the bearing bear the radial load is relatively small, life is much longer than the average pump.
4. There is no problem such as cavitation damage and irrigation. Especially after the operation of the staff to bring a lot of convenience.
5. Vibration noise is small, the motor temperature is low, no pollution to the environment.
It is precisely because of the above advantages, submersible sewage pump has been more and more people's attention, the use of more and more wide range, from the original simply used to transport water to the present can transport a variety of domestic sewage, industrial wastewater, Site drainage, liquid feed and so on.
In the municipal engineering, industry, hospitals, construction, hotels, water conservancy construction and other industries play a very important role.
But anything is divided into two, for the submersible sewage pump is the most critical issue is the reliability of the problem, because the use of submersible sewage pump is in the liquid; transport medium is a mixture of solid materials containing some of the material; Pump and motor close; pump for the vertical arrangement, the weight of rotating parts and impeller to withstand the same water pressure. These problems make the submersible sewage pump in the seal, the motor carrying capacity, bearing layout and selection requirements are higher than the average sewage pump.
In order to improve the life of submersible sewage pump, most manufacturers at home and abroad are in the pump protection system to find a way, that is, in the pump leakage, overload, over temperature and other failures can be automatic alarm, and automatic shutdown repair. But we believe that in the submersible sewage pump to set the protection system is necessary, it can effectively protect the safe operation of the pump. But this is not the key to the problem, the protection system is only a failure in the pump after a remedy, is a more passive approach. The key issue should be from the fundamental, completely solve the pump in the seal, overload and other aspects of the problem, this is a more proactive approach. For this reason, we have the impeller fluid power sealing technology and pump without overload design technology used in submersible sewage pump, a greater increase in the pump seal reliability and carrying capacity, extending the pump life.
Application of the Impeller Fluid Power Sealing Technology
The so-called secondary impeller hydrodynamic seal means that an open impeller is mounted in the opposite direction to the opposite side of the back of the impeller rear cover. When the pump is in operation, the auxiliary impeller rotates with the pump spindle, and the liquid in the secondary impeller rotates together. The rotating liquid produces an outward centrifugal force which, on the one hand, pushes against the liquid flowing to the mechanical seal, The pressure at the seal. On the other hand to prevent the solid particles in the media into the mechanical seal of the friction pair, to reduce the wear of mechanical seal grinding block to extend its service life.
Vice-impeller in addition to play a sealing effect, but also can play a role in reducing the axial force in the submersible sewage pump in the axial force is mainly caused by the liquid on the impeller on the pressure and the entire rotation of the gravity part of the composition The direction of the two forces is the same, the resultant force is added by two forces. It can be seen that in the case where the performance parameters are exactly the same, the axial force of the submersible sewage pump is larger than that of the horizontal pump, and the balance is more difficult than the vertical pump. So in the submersible sewage pump, the bearing is easy to damage the reason is also a great relationship with the axial force.
And if the auxiliary impeller is installed, the direction of the liquid acting on the auxiliary impeller is opposite to that of the above two forces, which can counteract a part of the axial force and also prolong the bearing life. However, the use of secondary impeller sealing system also has a drawback, that is, in the auxiliary impeller to consume part of the energy, usually around 3%, but as long as the design is reasonable, can this part of the loss to a minimum.
China professional submersible sewage pump manufacturer - Shanghai Weihu pump, Welcome the new and old customers in our company custom wholesale sewage pump
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