CN218787197U

CN218787197U - Self-sealing guide bearing structure

Info

Publication number: CN218787197U
Application number: CN202222975642.6U
Authority: CN
Inventors: 郭辉
Original assignee: Wuhan Special Industry Pump Factory Co ltd
Current assignee: Wuhan Special Industry Pump Factory Co ltd
Priority date: 2022-11-07
Filing date: 2022-11-07
Publication date: 2023-04-04
Anticipated expiration: 2032-11-07

Abstract

The utility model discloses a self sealss guide bearing structure, be applied to in the water pump, self sealss guide bearing structure includes and puts the outer bearing body that leads of connecting by outer to interior coaxial cover, bearing housing and slide bearing, the connection can be dismantled to outer bearing body and bearing housing, slide bearing wraps up in the bearing housing, the outer bearing body inboard that leads that is close to impeller rivers output side is formed with at least one annular holding tank, the holding tank encloses with the water pump main shaft and closes the formation and hold the chamber, it can the lubricated liquid of impressing to hold the intracavity, the lubricated liquid that holds the intracavity when the working shaft is rotatory forms annular barrier, and it gets into slide bearing with the rivers entering of preventing impeller rivers output side to hold intracavity pressure to be greater than the rivers pressure that flow from the impeller. The utility model provides a rivers that contain silt and other granule among the prior art through can follow the clearance that guide bearing lower part got into bearing and axle, lead to main shaft and bearing to cause the technical problem of wearing and tearing.

Description

Self-sealing guide bearing structure

Technical Field

The utility model relates to a vertical pump technical field, concretely relates to self sealss guide bearing structure.

Background

The vertical pump comprises a vertical long-shaft pump, a vertical diagonal flow pump and the like, is suitable for agricultural irrigation and drainage and water supply in water conservancy projects, and has very important position in the fields of drainage of stagnant water, drought resistance, urban water drainage, north-south water diversion and the like. When the vertical pump works, water flow with certain pressure flowing out of the impeller enters a gap between the bearing and the shaft from the lower part of the guide bearing, and the main shaft and the bearing are abraded if the water flow is not limited to enter, so that the vertical pump is stopped in serious conditions.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned technique not enough, provide a bearing structure is led to self sealss, solve among the prior art rivers that contain silt and other granule through can follow the clearance that guide bearing lower part got into bearing and axle, lead to main shaft and bearing to cause the technical problem of wearing and tearing.

In order to achieve the technical purpose, the utility model adopts the following technical proposal:

the utility model provides a self sealss guide bearing structure, is applied to the water pump, and self sealss guide bearing structure includes by outer to interior coaxial cover put the outer bearing body, bearing housing and the slide bearing of leading of connection, leads bearing body and bearing housing can dismantle the connection outward, and slide bearing wraps up in the bearing housing, is close to impeller rivers output side the internal side of outer bearing body is formed with one at least annular holding tank, the holding tank encloses with the water pump main shaft and closes the formation and hold the chamber, hold the intracavity and can impress lubricated liquid to when the working shaft is rotatory the lubricated liquid that holds the intracavity forms annular barrier, and holds intracavity pressure and be greater than the rivers entering slide bearing of rivers pressure that flow in order to prevent impeller rivers output side from the impeller.

Preferably, the outer guide bearing body comprises two semicircular main bodies which are arranged in a split manner, and connecting bodies which are respectively formed at the left side and the right side of the two semicircular main bodies; when two semicircle main part amalgamation states, the relative setting of corresponding connector just can be via coupling assembling dismantlement connection.

Preferably, coupling assembling includes double-screw bolt, nut, the connecting hole has all been seted up on the connector to wear to locate the connecting hole and screw up through the nut through the double-screw bolt and connect.

Preferably, the two oppositely arranged connecting bodies are further provided with first positioning holes for the first positioning pins to penetrate through.

Preferably, the top of the outer guide bearing body extends radially outwards to form a flange-shaped convex ring, and the convex ring can be fixed to the guide vane body through a connecting assembly.

Preferably, the side wall of the bearing sleeve is connected with the side wall of the outer guide bearing body through a bolt, and the top wall of the bearing sleeve is connected with the top wall of the outer guide bearing body through a seam-riding screw.

Preferably, the sliding bearing is made of wear-resistant rubber, sialon or sialon, and is used for supporting the main shaft.

Preferably, two semicircle main parts are close to impeller rivers output side and all are formed with the three U type grooves that set up around the main shaft, and U type groove one-to-one intercommunication is in order to form three annular holding tanks under two semicircle main parts amalgamation state.

Preferably, three U-shaped grooves on the semicircular main body are arranged in parallel at equal intervals.

Compared with the prior art, the utility model provides a self sealss guide bearing structure is applied to in the water pump, the external guide bearing internal side through being close to impeller rivers output side is formed with at least one annular holding tank, the holding tank encloses with the water pump main shaft and closes and form and hold the chamber, when the water pump operation, let in the lubricated rivers (0.1-0.15 MPa) that are higher than the highest lift of water pump in the self sealss guide bearing structure, this high pressure lubrication rivers flow in along the clearance between slide bearing and the main shaft and hold the chamber, form high-pressure annular basin under the drive of high-speed rotatory water pump main shaft, like a water wall. The lubricating water is continuously introduced, so that the water tank is continuously formed. Because the pressure of the introduced lubricating water flow is greater than the pump lift, the water flow flowing out of the impeller can be blocked from entering the sliding bearing.

Drawings

Fig. 1 is a cross-sectional view of an embodiment of a self-sealing guide bearing structure provided by the present invention;

fig. 2 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A of fig. 1.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Please refer to fig. 1 and 2, an embodiment of the present invention provides a self-sealing guide bearing structure, which is applied to a water pump, the self-sealing guide bearing structure includes an outer guide bearing body 10 connected by an outer-to-inner coaxial sleeve, a bearing sleeve 20 and a sliding bearing 30, the outer guide bearing body 10 and the bearing sleeve 20 are detachably connected, the sliding bearing 30 is wrapped in the bearing sleeve 20, the inner side of the outer guide bearing body 10 near the water flow output side of the impeller is formed with at least one annular accommodating groove 11, the accommodating groove 11 and the water pump spindle are enclosed to form an accommodating cavity, the accommodating cavity can press in lubricating liquid, the lubricating liquid in the accommodating cavity forms an annular barrier when the water supply pump spindle rotates, and the pressure in the accommodating cavity is greater than the water flow pressure flowing out from the impeller, so as to prevent the water flow of the water flow output side of the impeller from entering the sliding bearing 30.

The utility model provides a self sealss guide bearing structure, 10 inboards of outer guide bearing body through being close to impeller rivers output side are formed with annular holding tank 11 at least one, holding tank 11 encloses with the water pump main shaft and closes and form and hold the chamber, when the water pump moves, let in the lubricated rivers (0.1-0.15 MPa) that are higher than the highest lift of water pump in to self sealss guide bearing structure, this high-pressure lubrication rivers flow in along the clearance between slide bearing 30 and the main shaft and hold the chamber, form high-pressure annular basin under the drive of high-speed rotatory water pump main shaft, like a water wall. The lubricating water is continuously introduced, so that a water tank is continuously formed. Because lubricated rivers pressure is greater than the water pump lift, and slide bearing 30 wraps up in bearing housing 20 for the rivers that flow out in the impeller can only communicate to slide bearing 30 through holding the chamber, therefore the basin can block the rivers that flow out from the impeller and get into slide bearing 30.

Further, outer guide bearing body 10 includes two semicircle main parts 12 that the components of a whole that can function independently set up, forms the connector 13 in two semicircle main parts 12 left and right sides respectively, and when two semicircle main parts 12 amalgamation state, the relative setting of connector 13 that corresponds just can dismantle the connection via coupling assembling 14. The structure can realize replacement of the outer guide bearing body 10 on the basis of not disassembling the main shaft of the water pump, and improves the maintenance efficiency.

It can be understood that the connecting assembly 14 includes a stud and a nut, and the connecting body 13 is provided with a connecting hole 131, so that the stud is inserted into the connecting hole 131 and screwed via the nut. In practical application, the two oppositely disposed connecting bodies 13 are further provided with first positioning holes 132 for the first positioning pins to pass through.

In this embodiment, a flange-shaped protruding ring 12 extends radially outward from the top of the outer guide bearing body 10, and the protruding ring 12 can be fixed to the guide vane body via a connecting assembly 14. The side wall of the bearing sleeve 20 is connected with the side wall of the outer guide bearing body 10 through bolts, and the top wall of the bearing sleeve 20 is connected with the top wall of the outer guide bearing body 10 through a seam-riding screw 40. The sliding bearing 30 is made of wear-resistant rubber, sialon or sialon material, and is used for supporting the main shaft.

As a preferred embodiment, three U-shaped grooves are formed on the two semicircular main bodies 12 close to the water flow output side of the impeller, and the U-shaped grooves are correspondingly communicated one by one to form three annular accommodating grooves 11 in the assembled state of the two semicircular main bodies. Three U-shaped grooves on the semicircular main body are arranged in parallel at equal intervals.

The details of the application of the self-sealing guide bearing structure will be described in detail below.

In order to replace the outer guide bearing body 10 on the basis of not disassembling the main shaft of the water pump, the outer guide bearing body 10 is designed into a semi-structure, and two semi-circular main bodies 12 are combined through bolts, nuts, washers and first positioning pins. The self-sealing guide bearing structure can be arranged in a guide vane body of a shaft, a mixed flow pump or a long shaft vertical pump and is divided into an inner layer, a middle layer and an outer layer. The outermost layer is an outer guide bearing body 10, 2-3U-shaped grooves are formed in the lower portion of the outer guide bearing body 10, and the outer guide bearing body 10 is fixed on the guide vane body through a stud, a nut, a washer and a positioning pin and mainly plays a supporting role. The middle layer is a bearing sleeve 20, and the bearing sleeve 20 is fixedly connected with the outer guide bearing body through bolts and riding screws. The innermost layer is a sliding bearing 30 which is made of wear-resistant rubber, sialon or sialon and has a supporting effect on the main shaft of the water pump. Before the water pump is started, clean lubricating water with certain pressure and temperature not exceeding 20 degrees is fed into the water pump in advance to flush the sliding bearing 30. After the machine is started, along with the high-speed rotation of the main shaft, clean pressure water flow forms a rotary annular barrier in the U-shaped groove, and the pressure is greater than the pressure of the water flow flowing out of the impeller, so that the water flow flowing out of the impeller can be prevented from entering the bearing, and the service life of the bearing is prolonged.

To sum up, the utility model provides a self sealss guide bearing structure, 10 inboards of outer guide bearing body through being close to impeller rivers output side are formed with annular holding tank 11 one at least, holding tank 11 encloses with the water pump main shaft and closes and form and hold the chamber, when the water pump operation, let in the lubricated rivers (0.1-0.15 MPa) that are higher than the highest lift of water pump in to self sealss guide bearing structure, this high pressure lubrication rivers flow in along the clearance between slide bearing 30 and the main shaft and hold the chamber, form high-pressure annular basin under the drive of high-speed rotatory water pump main shaft, like a water wall. The lubricating water is continuously introduced, so that the water tank is continuously formed. Because the pressure of the lubricating water flow is larger than the lift of the water pump, the water flow flowing out of the impeller can be blocked from entering the sliding bearing.

The above description of the present invention does not limit the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the scope of the claims of the present invention.

Claims

1. The utility model provides a self sealss guide bearing structure, its characterized in that is applied to the water pump, and self sealss guide bearing structure includes and puts outer bearing body, bearing housing and the slide bearing of leading of connection to interior coaxial cover by outer, leads bearing body and bearing housing can dismantle the connection, and slide bearing wraps up in the bearing housing, is close to impeller rivers output side outer lead the internal side of bearing and is formed with one at least annular holding tank, the holding tank encloses with the water pump main shaft and closes to form and hold the chamber, hold the intracavity and can impress lubricated liquid to when the working shaft is rotatory the lubricated liquid that holds the intracavity forms annular protective screen, and holds intracavity pressure and be greater than the rivers pressure that flows from the impeller and get into slide bearing with the rivers that prevent impeller rivers output side.

2. The self-sealing guide bearing structure of claim 1, wherein the outer guide bearing body comprises two semicircular main bodies which are arranged separately, and connecting bodies which are respectively formed at the left and right sides of the two semicircular main bodies; when two semicircle main parts amalgamation state, the relative connector that corresponds sets up and can dismantle the connection via coupling assembling.

3. The self-sealing guide bearing structure of claim 2, wherein the connecting assembly comprises a stud and a nut, and the connecting bodies are provided with connecting holes so as to be inserted into the connecting holes through the stud and screwed together through the nut.

4. The self-sealing guide bearing structure as claimed in claim 3, wherein the two opposite connecting bodies further have a first positioning hole for the first positioning pin to pass through.

5. The self sealing guide bearing structure as claimed in claim 3, wherein a flange-like collar extends radially outwardly from the top of the outer guide bearing body, the collar being securable to the vane body via a connection assembly.

6. The self-sealing guide bearing structure as claimed in claim 1, wherein the side walls of the bearing housing and the side walls of the outer guide bearing body are connected via bolts, and the top wall of the bearing housing and the top wall of the outer guide bearing body are connected via a setscrew.

7. The self-sealing guide bearing structure of claim 1, wherein the sliding bearing is a sliding bearing made of wear-resistant rubber, sialon or sialon for supporting the main shaft.

8. The self-sealing guide bearing structure as claimed in claim 2, wherein the two semi-circular bodies are formed with three U-shaped grooves around the main shaft on the water flow output side of the impeller, and the U-shaped grooves are communicated one-to-one in the assembled state of the two semi-circular bodies to form three annular receiving grooves.

9. The self-sealing guide bearing structure of claim 8, wherein the three U-shaped grooves on the semi-circular body are arranged in parallel and at equal intervals.