The Basic Structure Of Centrifugal Pumps

The basic structure of a centrifugal pump consists of eight parts, namely: impeller, pump body, pump cover, water retaining ring, pump shaft, bearings, sealing ring, packing box, and axial force balancing device.
1. The impeller is the core part of a centrifugal pump, with high rotational speed and large output force.
2. The pump body, also known as the pump casing, is the main body of the water pump. Plays a supporting and fixing role, and is connected to the bracket for installing bearings.
3. The function of the pump shaft is to connect the coupling and the electric motor, transmitting the torque of the electric motor to the impeller, so it is the main component for transmitting mechanical energy
4. Sealing ring, also known as leak reducing ring.
5. The packing box is mainly composed of packing, which prevents the water flow inside the pump from flowing outside and the air from outside from entering the pump. Always maintain vacuum inside the water pump! When the friction between the pump shaft and the packing generates heat, it is necessary to use the water seal pipe to inject water into the water seal ring to cool the packing!
6. Axial force balancing device. During the operation of a centrifugal pump, due to the liquid entering the impeller at low pressure and flowing out at high pressure, the pressure on both sides of the impeller is unequal, resulting in axial thrust pointing towards the inlet direction. This can cause axial displacement, wear, and vibration of the rotor. Therefore, axial thrust bearings should be installed to balance the axial force.