CN210799369U - Single-stage double-suction self-regulating fluid dynamic and static pressure bearing centrifugal pump - Google Patents

Abstract

The utility model relates to a single-stage double-suction self-adjusting fluid dynamic and static pressure bearing centrifugal pump, which comprises a pump body, a pump cover, an impeller, a pump shaft, a shaft sleeve, a flushing pipe, a fluid dynamic and static pressure bearing, a shaft seal and other parts; the fluid dynamic and static pressure bearing is provided with a pressure stabilizing cavity and a flow guide hole, and pressure balance is achieved through oil sealing edges; the pump body is provided with a backflow hole. The utility model has the advantages of no need of extra oil supply system, simple structure, and easy assembly and disassembly of the traditional bearing of the single-stage double-suction centrifugal pump; the failure rate of the bearing is low; the improved pump shaft has shorter moment than the traditional pump shaft, uniform stress and low bending failure rate of the pump shaft; the bearing and the shaft sleeve do not slide relatively, no abrasion is caused, the temperature distribution is uniform, and the bearing has high reliability and long service life; the homogenization of the bearing greatly reduces the influence caused by small inaccuracy in the manufacturing process; the expected bearing performance can be accurately obtained through theoretical analysis and experimental research; the application range is wide.

Description

Single-stage double-suction self-regulating fluid dynamic and static pressure bearing centrifugal pump

Technical Field

The utility model relates to a centrifugal pump, concretely relates to need not extra oil feeding system, simple structure has solved the single-stage double suction self-interacting fluid hybrid bearing centrifugal pump of the difficult problem of single-stage double suction centrifugal pump traditional bearing installation dismantlement.

Background

In general design, a balance hole is mainly formed in a balance cavity of a rear cover plate of an impeller, axial force is reduced, leakage loss of a pump is increased, the lift and efficiency of the pump are reduced, and meanwhile, the axial force is reduced relatively slightly due to the addition of the horizontal position of the balance hole.

Fig. 4 is a schematic structural diagram of a conventional double-suction centrifugal pump. Referring to fig. 4, a bearing seat is arranged at a position A in the figure, and a deep groove ball bearing is adopted, and belongs to a rolling bearing; in the figure, a mechanical seal or a packing seal is adopted at the position B.

SUMMERY OF THE UTILITY MODEL

In view of the above, an object of the present invention is to provide a centrifugal pump without an extra oil supply system, which has a simple structure and solves the problem of the difficulty in assembling and disassembling the conventional bearings of the single-stage double-suction centrifugal pump.

The utility model discloses a solve above-mentioned technical problem through following technical scheme: the utility model provides a single-stage double suction self-interacting fluid hybrid bearing centrifugal pump, includes the pump body and one locates the inside impeller of this pump body, and the water inlet level of this impeller sets up in pump body one side, and the delivery port level sets up at pump body another side, single-stage double suction self-modulation fluid hybrid bearing centrifugal pump includes: the pump body, pump cover, impeller, pump shaft, axle sleeve, wash pipe, fluid hybrid bearing, bearing seal chamber, suction chamber, jump ring.

The impeller is fixedly connected with the pump shaft through a key, the shaft sleeve is fixedly arranged on the pump shaft through a clamp spring, and the fluid dynamic and static pressure bearing and the shaft seal are fixed through the shaft sleeve; the impeller, the pump shaft, the shaft sleeve, the fluid dynamic and static pressure bearing, the shaft seal and the clamp spring form a set of assembly whole, and the assembly whole can be integrally taken out of or installed in the pump body.

The fluid dynamic and static pressure bearing is provided with a flow guide hole and a pressure stabilizing cavity, and the pressure balance is achieved by sealing oil through a fit clearance formed by the fluid dynamic and static pressure bearing and the shaft sleeve; the pump body is provided with a backflow hole for collecting and guiding liquid to return to the water suction chamber of the water pump.

The flushing pipe is connected with the pump body pumping chamber and the bearing cavity, the fluid dynamic and static pressure bearing and the shaft seal are arranged on the shaft sleeve, and the shaft seal plays a role in sealing; the impeller, the water pressing chamber, the flushing pipe, the bearing cavity, the flow guide hole, the pressure stabilizing cavity, the shaft seal cavity and the water suction chamber form a complete loop.

In a specific embodiment of the present invention; when the pump operates, the impeller works on liquid, the liquid flows to the bearing cavity through the water pressing chamber and the flushing pipe, the liquid passes through the flow guide hole, pressure is acted on the shaft sleeve in the pressure stabilizing cavity to support and fix the pump shaft, the liquid then enters the shaft seal cavity through the oil sealing edge, and the shaft seal is flushed, lubricated and cooled, and finally flows back to the water suction chamber again for full utilization.

The utility model discloses an actively advance the effect and lie in: the utility model provides a single-stage double suction self-interacting fluid hybrid bearing centrifugal pump has following advantage: the utility model has the advantages of no need of extra oil supply system, simple structure, and easy assembly and disassembly of the traditional bearing of the single-stage double-suction centrifugal pump; the failure rate of the bearing is low; the improved pump shaft has shorter moment than the traditional pump shaft, uniform stress and low bending failure rate of the pump shaft; the bearing and the shaft sleeve do not slide relatively, no abrasion is caused, the temperature distribution is uniform, and the bearing has high reliability and long service life; the homogenization of the bearing greatly reduces the influence caused by small inaccuracy in the manufacturing process; the expected bearing performance can be accurately obtained through theoretical analysis and experimental research; the application range is wide.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a partial enlarged view of the middle hydrodynamic hydrostatic bearing of the present invention.

Fig. 3 is a left side view of fig. 2.

Fig. 4 is a schematic structural diagram of a conventional double-suction centrifugal pump.

The utility model discloses the name that well reference numeral corresponds:

the pump body 1, the pump cover 2, the pump body pumping chamber 4, the impeller 3, the pump shaft 5, the shaft sleeve 6, the flushing pipe 7, the fluid dynamic and static pressure bearing 8 and the shaft seal 9; the bearing assembly comprises a shaft seal cavity 10, a backflow hole 11, a bearing cavity 12, a water suction chamber 13, a clamp spring 14, a flow guide hole 15, a pressure stabilizing cavity 16 and an oil sealing edge 17.

Detailed Description

The following provides a preferred embodiment of the present invention with reference to the accompanying drawings to explain the technical solutions of the present invention in detail.

Fig. 1 is the utility model discloses an overall structure schematic diagram, as shown in fig. 1, the utility model provides a single-stage double suction self-regulation fluid hybrid bearing centrifugal pump includes the pump body and one locates the inside impeller of this pump body, and the water inlet level of this impeller sets up in pump body one side, and the delivery port level sets up at pump body another side, and this single-stage double suction self-regulation fluid hybrid bearing centrifugal pump includes: the pump body 1, the pump cover 2, the impeller 3, the pump shaft 5, the shaft sleeve 6, the flushing pipe 7, the fluid dynamic and static pressure bearing 8, the shaft seal 9, the shaft seal cavity 10, the water suction chamber 13 and the clamp spring 14.

The impeller 3 is fixedly connected with the pump shaft 5 through a key, the shaft sleeve 6 is fixedly arranged on the pump shaft 5 through a clamp spring 14, and the fluid dynamic and static pressure bearing 8 and the shaft seal 9 are fixedly arranged through the shaft sleeve 6; the impeller 3, the pump shaft 5, the shaft sleeve 6, the fluid dynamic and static pressure bearing 8, the shaft seal 9 and the clamp spring 14 form a set of assembly whole, and the assembly whole can be integrally taken out of or mounted in the pump body 1.

The fluid dynamic and static pressure bearing 8 is provided with a flow guide hole 15 and a pressure stabilizing cavity 16, and the pressure balance is achieved through a fit clearance oil sealing edge 17 formed by the fluid dynamic and static pressure bearing 8 and the shaft sleeve 6; the pump body 1 is provided with a return hole 11 for collecting and guiding liquid back to the water suction chamber of the water pump.

The flushing pipe 7 is connected with the pump body pumping water chamber 4 and the bearing cavity 12, the fluid dynamic and static pressure bearing 8 and the shaft seal 9 are arranged on the shaft sleeve 6, and the shaft seal 9 plays a role in sealing; the impeller 3, the pumping chamber 4, the flushing pipe 7, the bearing cavity 12, the flow guide hole 15, the pressure stabilizing cavity 16, the shaft seal cavity 10 and the water suction chamber 13 form a complete loop.

When the pump operates, the impeller works on liquid, the liquid flows to the bearing cavity through the water pressing chamber and the flushing pipe, the liquid passes through the flow guide hole, pressure is acted on the shaft sleeve in the pressure stabilizing cavity to support and fix the pump shaft, the liquid then enters the shaft seal cavity through the oil sealing edge, and the shaft seal is flushed, lubricated and cooled, and finally flows back to the water suction chamber again for full utilization.

The utility model has simple structure and low failure rate; the bearing has the advantages that the bearing is convenient to mount and dismount, the pump shaft bending failure rate is low, the reliability is high, the service life is long, the influence caused by small inaccuracy in the manufacturing process is greatly reduced, and the expected bearing performance can be accurately obtained; the application range is wide.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined by the appended claims and their equivalents.

Claims (1)

1. The utility model provides a single-stage double suction self-interacting fluid hybrid bearing centrifugal pump, includes the pump body and one locates the inside impeller of this pump body, and the water inlet level of this impeller sets up in pump body one side, and the delivery port level sets up at pump body another side, its characterized in that: the single-stage double-suction self-regulating fluid hydrostatic bearing centrifugal pump comprises: the pump comprises a pump body, a pump cover, an impeller, a pump shaft, a shaft sleeve, a flushing pipe, a fluid dynamic and static pressure bearing, a shaft seal cavity, a water suction chamber and a clamp spring;

the impeller is fixedly connected with the pump shaft through a key, the shaft sleeve is fixedly arranged on the pump shaft through a clamp spring, and the fluid dynamic and static pressure bearing and the shaft seal are fixed through the shaft sleeve; the impeller, the pump shaft, the shaft sleeve, the fluid dynamic and static pressure bearing, the shaft seal and the clamp spring form a set of assembly whole, and the assembly whole can be integrally taken out of or installed in the pump body;

the fluid dynamic and static pressure bearing is provided with a flow guide hole and a pressure stabilizing cavity, and the pressure balance is achieved by sealing oil through a fit clearance formed by the fluid dynamic and static pressure bearing and the shaft sleeve; a backflow hole for collecting and guiding liquid to return to a water suction chamber of the water pump is formed in the pump body;

the flushing pipe is connected with the pump body pumping chamber and the bearing cavity, the fluid dynamic and static pressure bearing and the shaft seal are arranged on the shaft sleeve, and the shaft seal plays a role in sealing; the impeller, the water pressing chamber, the flushing pipe, the bearing cavity, the flow guide hole, the pressure stabilizing cavity, the shaft seal cavity and the water suction chamber form a complete loop.

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