Water pump axial force self-balancing device

Abstract

The invention relates to a water pump axial force self-balancing device. The water pump axial force self-balancing device comprises a water pump water inlet and outlet segment. The water pump water inlet and outlet segment is divided into a high-pressure area and a low-pressure area. A backflow hole is formed in the bottom of the high-pressure area. The backflow hole communicates with a backflow channel of the water pump water inlet and outlet segment. High-pressure water flow of the high-pressure area flows towards the low-pressure area through the backflow hole and the backflow channel. A balance base is arranged on the water pump water inlet and outlet segment. The balance base is arranged below a pump shaft. A lifting plate is arranged on the balance base. The lifting plate is arrangedat the bottom of the low-pressure area. The lifting plate is jacked up under the action of the high-pressure water flow. A fixed ring is arranged on the lifting plate. The lifting plate and the fixedring float upwards and downwards on the balance base. A rotary ring matched with the fixed ring is arranged on the top of the fixed ring. The rotary ring is installed on a thrust disk, and is in press fit with the pump shaft through a press cover. Compared with the prior art, the downward axial force of a rotor can be balanced, the problems in water pump balance are solved, the burden caused to amotor structure is relieved, and specially customized improved motor structures, such as a motor structure provided with an enlarged bearing, is not needed.

Description

[technical field] [0001] The invention relates to the technical field of multistage centrifugal pumps, in particular to a water pump axial force self-balancing device. [Background technique] [0002] At present, when the general vertical multistage centrifugal pump is running, there is a pressure difference between the impeller and the water inlet and outlet, so that the water pump rotor generates a downward axial force toward the water inlet. The downward axial force of traditional vertical multi-stage pumps is mainly borne by the motor bearings. Due to the large number of impeller stages, high head, and large axial force, it is easy to cause damage to the motor bearings, which in turn damages the motor, resulting in losses, and Most of the motors need to change the structure to increase the bearing, etc., which brings a lot of inconvenience to the manufacture of the motor. [Content of the invention] [0003] The purpose of the present invention is to solve the above-men...

AI Technical Summary

Problems solved by technology

The downward axial force of the traditional vertical multi-stage pump is mainly borne by the motor bearing. Due to the large number of impeller stages, the high lift and the large axial force, it is easy to cause damage to the motor bearing, and then the motor damage, resulting in losses, and Most of the motors need to change the structure and increase the bearings, etc., which brings a lot of inconvenience to the motor production

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