Self-balancing self-positioning energy-saving multi-stage water pump

Abstract

The invention relates to a self-balancing self-positioning energy-saving multi-stage water pump which causes no play of a pump shaft, can automatically balance an axial force, also can adjust the axial force at any time along with variation of the axial force and is high in working efficiency, low in failure rate and long in operation life. The self-balancing self-positioning energy-saving multi-stage water pump comprises a multi-stage pump body, a water outlet bearing and a water inlet bearing, wherein a pump shaft penetrates through in the multi-stage pump body, the pump shaft is provided with multiple impellers, seals are arranged between the pump shaft and a water inlet section and between the pump shaft and a water outlet section, and a balancing device is arranged at one side of a water outlet. The self-balancing self-positioning energy-saving multi-stage water pump is characterized in that a bearing body positioning sleeve fixedly connected with the water inlet section is arranged at a water inlet, the bearing body positioning sleeve is internally provided with a sliding bearing body, the sliding bearing body and the bearing body positioning sleeve are connected by virtue of a positioning locking device, the inner edge of the sliding bearing body is fixedly connected with the water inlet bearing, and a puller bolt used for pulling the sliding bearing body is arranged on the bearing body positioning sleeve. The self-balancing self-positioning energy-saving multi-stage water pump is also provided with a water inlet bearing temperature measuring warning device.

Description

technical field [0001] The invention relates to an industrial water pump, in particular to a large-flow, high-lift self-balancing, self-positioning, energy-saving multi-stage water pump. Background technique [0002] At present, many enterprises need to use multi-stage drainage pumps with large flow and high head in the production process. Existing multi-section drainage pumps are usually composed of water inlet and outlet sections, middle sections and guide vanes fixed together by fastening bolts, bearing supports fixed on the water inlet and outlet sections on both sides, and thrusters installed on the bearing supports. The bearing supports and runs through the pump shaft of the multi-section pump body, as well as the multiple impellers and balance system installed on the pump shaft. Its balance system is composed of a balance disc installed on the pump shaft and located on the water outlet section, a balance plate and a balance sleeve, and a balance water pipe connecting...

AI Technical Summary

Problems solved by technology

The water pump with this structure has a high failure rate due to the swaying of the rotor parts, the parts are easily damaged, and the operating life is short. Moreover, its mechanical loss, hydraulic loss, and volume loss are large, and the annual average efficiency is low. more than 65%

[0004] For the multi-stage pump mentioned above, if the gap between the balance plate and the balance disc is adjusted to an appropriate size, the axial force can also be balanced, and the thrust bearings on both sides will bear the residual axial force, but their gap is very small. Difficult to adjust, once the adjustment is not good or the axial force changes greatly, the pump will not work normally

[0005] There is a multi-stage pump with a balance hub structure, which can also balance the axial force, but the balance hub and the balance hub sleeve are large in size and have high machining accuracy. After the pump is assembled, the position and gap between them are fixed. If the operating parameters of the water pump change and the axial force changes greatly, the excess axial force can only be borne by the bearings on both sides. If the axial force exceeds the bearing capacity of the bearing, the bearing may be damaged

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