Structure Description
Self-balance multistage centrifugal pump is supported at both ends, and the casing is segmented. The transmission mode of the pump is connected to the motor through a pin elastic coupling.
The direction of rotation of the self-balance multistage pump, viewed from the drive end, the pump rotates clockwise.
The structure of the self-balance multistage pump is shown as below
Stator part
It is mainly composed of suction section (inlet section), middle section, discharge section (outlet section), guide vane, secondary inlet section, stuffing box (tail cover) and bearing body,which all these parts connected with tension bolts into one unit. At the shaft end, the suction port of the pump is horizontal and right, and the discharge port is vertically upward.
Rotor part
It is mainly composed of shaft, impeller, throttle shaft components, bearings and bushings.
Sealing of the pump
The static joint surface between the pump suction section (inlet section), middle section, discharge section (outlet section), and secondary inlet section is sealed with sealant or molybdenum disulfide.
Throttle seals are used between pump stages.
The shaft seals on both sides of the pump are sealed with soft packing.
A water retaining ring is used to prevent water from entering the bearing.
Bearing
The whole rotor of the pump type is supported by the cylindrical roller bearing "GB/T283-94" at the drive end, and the end is supported by "GB/T292-94" angular contact ball bearing. The bearing is lubricated with CD30 or CD40 mechanical oil into the bearing body to the center of the oil mirror. Because the bearing adopts "GB/T292-94" angular contact ball bearing, the assembled pump rotor has no axial movement.
