Structural Features Of Clean Water Centrifugal Pump

1. Clean water centrifugal pump is designed according to the performance and size specified by the international standard ISO2858, and is mainly composed of pump body, pump cover, impeller, shaft, sealing ring, sleeve and suspension bearing components.
2. The pump body and pump cover of the clean water centrifugal pump are split from the back of the impeller, which is commonly known as the rear-opening structure. Its advantage is that it is easy to repair. During maintenance, the pump body, suction pipeline, discharge pipeline and motor do not move. Only the intermediate connecting piece of the extended coupling needs to be removed to withdraw the rotor part for maintenance.
3. The shell (i.e. pump body and pump cover) of the clean water centrifugal pump constitutes the working room of the water pump. The impeller, shaft and rolling bearing are the rotor of the pump. The suspension bearing component supports the rotor part of the pump, and the rolling bearing is subjected to the radial force and axial force of the pump.
4. In order to balance the axial force of the pump, most pumps are equipped with sealing rings in front and behind the impeller, and a balancing hole is provided on the rear cover of the impeller. Since the axial force of some pumps is not large, there is no sealing ring and balancing hole on the back of the impeller.
5. The axial sealing ring of the clean water centrifugal pump is composed of a packing gland, a packing ring and a packing to prevent air intake or large amounts of water leakage. If the impeller of the pump is balanced, the cavity with soft packing is connected to the suction port of the impeller. If the liquid at the inlet of the impeller is in a vacuum state, it is easy to inlet air along the surface of the sleeve. Therefore, a packing ring is installed in the packing cavity. Through the small hole on the pump cover, the pressure water in the clean water centrifugal pump room is led to the packing ring for sealing. If the impeller of the pump does not have a balancing hole, since the liquid pressure on the back of the impeller is greater than the atmospheric pressure, there is no leakage problem, so the packing ring can be omitted.
6. In order to avoid shaft wear, the clean water centrifugal pump is equipped with a sleeve protection at the part where the shaft passes through the packing cavity. There is an O-ring between the sleeve and the shaft to prevent air intake or water leakage along the mating surface.
7. The transmission mode of the clean water centrifugal pump is connected to the motor through an extended elastic coupling. The rotation direction of the pump, viewed from the drive end, is clockwise.