The composition and introduction of multistage centrifugal pump

Multistage centrifugal pump is mainly composed of four parts: stator, rotor, bearing and shaft seal:

1. The stator part of the multistage centrifugal pump is mainly composed of the suction section, the middle section, the spit section and the guide vane, etc., and the tension bolt will clamp each section to form the studio. Type D pump generally horizontal suction, vertical upward spit; When used for oil field water injection, the inlet and outlet of the pump are vertical upward. DG type multistage pump, inlet are vertical upward.

2, The multi-stage centrifugal pump rotor part is mainly composed of shaft, impeller, balance disc and shaft sleeve. The axial force is balanced by the balance plate.

3, Multistage centrifugal pump bearings are mainly composed of bearing body, bearings and bearing caps, bearings with grease or thin oil lubrication.

4, Multistage centrifugal pump shaft seal with soft packing seal, mainly by the inlet section and tail cover on the sealing box, packing, water ring and so on. Type D multistage pump water seal water from the pump pressure water. DG type pump water seal water from the external water supply.

5, Multistage centrifugal pump rotating pump through the elastic coupling is directly driven by the motor. From the motor end, the multistage pump rotates in a clockwise direction. D, DG type pump is a horizontal single-suction multi-stage centrifugal pump, for the transport of clean water (containing less than 1% impurity, particle size less than 0.1mm) or other liquids with physical and chemical properties similar to water. D type pump transport medium temperature is less than 80℃, suitable for mine drainage, oil field water injection, factory and city, drainage and other occasions. According to the corrosiveness of the medium, the multi-stage pump uses different materials. DG type pump transport medium temperature is less than 105℃, suitable for all kinds of boiler feed water.