CN216951269U

CN216951269U - Tilting pad thrust bearing capable of preventing thrust pad from falling off

Info

Publication number: CN216951269U
Application number: CN202220739334.0U
Authority: CN
Inventors: 何思聪; 赵圆满; 张锋; 严祝明; 程楚伟
Original assignee: Zhejiang Zhanggui Bearing Technology Co ltd
Current assignee: Zhejiang Zhanggui Bearing Technology Co ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2022-07-12
Anticipated expiration: 2032-03-31

Abstract

The utility model discloses a tilting pad thrust bearing capable of preventing a thrust pad from falling off, which comprises a bearing seat, wherein one side of the bearing seat is provided with an installation cavity, a balance block is installed in the installation cavity, one side of the balance block, which is far away from the bearing seat, is provided with a thrust pad, the bearing seat is provided with a first limiting structure and a fourth limiting structure, the thrust pad is provided with a second limiting structure matched with the first limiting structure, the outer side of the thrust pad is provided with a third limiting structure, the outer side of the thrust pad is provided with a retainer, and the third limiting structure is positioned between the retainer and the bearing seat; the fourth limiting structure and the thrust pad are alternately arranged, and the retainer is detachably connected with the fourth limiting structure; the utility model realizes the limit of the thrust pad in the circumferential direction, the radial direction and the axial direction, so that the thrust pad can only perform small tilting in all directions and can not fall off from the bearing body.

Description

Tilting pad thrust bearing capable of preventing thrust pad from falling off

Technical Field

The utility model belongs to the technical field of tilting pad thrust bearings, and particularly relates to a tilting pad thrust bearing capable of preventing a thrust pad from falling off.

Background

The self-balancing tilting pad thrust bearing with the balance weight is widely applied to equipment such as water pumps, turbines, fans and compressors which rotate at high speed and have large axial loads, rotors of the equipment rotating at high speed are generally installed horizontally, a tilting thrust pad in the self-balancing tilting pad thrust bearing with a conventional structure is not completely limited, a bearing seat is only provided with a notch which limits the circumferential movement of the thrust pad in the circumferential direction, before the thrust bearing is installed on the equipment, the thrust pad is not limited in the axial direction and the radial direction, and therefore when the bearing is installed and maintained, the thrust pad is easy to fall off from the bearing, and therefore the danger that the thrust pad is damaged or installation workers are injured by smashing exists.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a tilting pad thrust bearing that prevents a thrust pad from falling off, and solves the above-mentioned problems of the prior art.

In order to achieve the purpose, the utility model provides the following technical scheme:

a tilting pad thrust bearing for preventing a thrust pad from falling off comprises a bearing seat, wherein a mounting cavity is arranged on one side of the bearing seat, a balance block is mounted in the mounting cavity, and a thrust pad is arranged on one side, far away from the bearing seat, of the balance block; the first limiting structure and the fourth limiting structure are respectively arranged above the side wall of the installation cavity, the fourth limiting structure and the thrust pad are alternately arranged, and the retainer is detachably connected with the fourth limiting structure.

The mounting cavity is an annular groove, a plurality of first limiting units are arranged in the annular groove at equal intervals, and second limiting units matched with the first limiting units are arranged on the balance blocks.

The first limiting unit is a first limiting hole, the second limiting unit is a second limiting hole, the diameter of the first limiting hole is smaller than that of the second limiting hole, and step pins are arranged in the first limiting hole and the second limiting hole.

The inner wall of the bearing seat is provided with an extension section extending along the axial direction of the bearing seat, and the first limiting structure is arranged on the extension section.

The first limiting structure is a limiting groove arranged on the extension section.

The second limiting structure is a limiting clamping block.

The third limiting structure is a flange arranged on the outer side of the thrust pad; the retainer is arranged on one side of the flange far away from the bearing seat.

The anti-rotation device comprises a bearing seat and is characterized in that an anti-rotation part is arranged on the outer side of the bearing seat, the anti-rotation part is an anti-rotation pin, and the bearing seat is connected with a balance block through the anti-rotation pin.

The balance weight is composed of a plurality of balance units which are overlapped up and down.

The fourth limiting structure is an arc-shaped limiting flange arranged on the edge of the bearing seat, and the number of the arc-shaped limiting flanges is equal to that of the thrust pads.

The beneficial technical effects of the utility model compared with the prior art are that,

the utility model realizes the limit of the thrust pad in the circumferential direction, the radial direction and the axial direction, so that the thrust pad can only perform small tilting in all directions and can not fall off from the bearing body.

Drawings

Fig. 1 is an exploded view of the present invention.

Fig. 2 is a front view and a cross-sectional view of the present invention.

1. A bearing seat; 2. A thrust pad; 3. a lower balancing unit; 4. An upper balancing unit; 5. a pin; 6. a holder; 7. an anti-rotation pin; 8. a first step pin; 9. a second step pin; 10. a flange; 11. a limiting groove; 12. a limiting clamping block; 13. an arc-shaped limit flange; 14. a second limit groove; 15. and a second limiting clamping block.

Detailed Description

The utility model is further described with reference to the following figures and specific embodiments.

A tilting pad thrust bearing for preventing a thrust pad from falling off comprises a bearing seat 1, wherein one side of the bearing seat 1 is provided with an installation cavity, the bearing seat 1 is annular, a balance block is installed in the installation cavity, one side of the balance block, which is far away from the bearing seat, is provided with a thrust pad 2, the bearing seat 1 is provided with a first limiting structure and a fourth limiting structure, the thrust pad 2 is provided with a second limiting structure matched with the first limiting structure, the first limiting structure and the second limiting structure are used for limiting the axial movement of the thrust pad 2, the outer side of the thrust pad 2 is provided with a third limiting structure, the outer side of the thrust pad 2 is provided with a retainer 6, the third limiting structure is positioned between the retainer 6 and the bearing seat 1, and the retainer 6 is used for limiting the radial movement of the thrust pad 2; the first limiting structure and the fourth limiting structure are respectively arranged above the side wall of the mounting cavity, and the fourth limiting structure is used for limiting the circumferential movement of the thrust pad; the fourth limiting structure and the thrust pad are alternately arranged, and the retainer is detachably connected with the fourth limiting structure.

The fourth limiting structure is an arc limiting flange 13 arranged on the edge of the bearing seat 1, and the number of the arc limiting flanges 13 is equal to that of the thrust pads 2. When the thrust pad 2 is installed in place, the arc part of the outer side of the thrust pad 2 and the arc part of the outer surface of the arc-shaped limit flange 13 are in smooth transition.

The balance block consists of a plurality of balance units which are overlapped up and down; the cross sections of the balance unit and the thrust pad 2 are in sector shapes; in the present invention, the number of said balancing units is twice the number of thrust pads 2.

There are two types of balancing units, one being an upper balancing unit 4 and one being a lower balancing unit 3.

The first limiting unit is a first limiting hole, the second limiting unit is a second limiting hole, the vertical drop of the first limiting hole is smaller than the diameter of the second limiting hole, and step pins are arranged in the first limiting hole and the second limiting hole;

during installation, the small-diameter section of the step pin is inserted into the first limiting hole, and then the second limiting hole in the balance block is inserted into the large-diameter end of the step pin.

As shown in the figure: the upper balance unit 4 is limited through a first step pin 8, and the lower balance unit 3 is limited through a second step pin 9;

the inner wall of the bearing seat 1 is provided with an extension section extending axially, and the first limiting structure is arranged on the extension section.

The first limiting structure is a limiting groove 11 arranged on the extension section; the extension section and the limiting groove are both circular rings.

The second limiting structure is a limiting clamping block 12, and the limiting clamping block 12 is arranged in the limiting groove 11. The arrangement of the limiting groove 11 and the limiting fixture block 12 can axially limit the thrust pad 2.

As shown in fig. 2: in order to improve the limiting effect, a second limiting groove 14 may be provided on the thrust pad 2, and a second limiting fixture block 15 may be provided on the bearing seat 1.

The third limiting structure is a flange 10 arranged on the outer side of the thrust pad 2; the retainer 6 is arranged on one side of the flange 10, which is far away from the bearing seat 1, and the retainer 6 is detachably connected with an arc-shaped limiting flange 13 on the bearing seat through a pin 5; the cage 6 is annular.

The outer side of the bearing seat 1 is provided with an anti-rotation part, the anti-rotation part is an anti-rotation pin 7, and the bearing seat 1 is connected with the balance block through the anti-rotation pin 7.

When the bearing seat is used, the upper balance unit 4 and the lower balance unit 3 are sequentially arranged in the annular groove of the bearing seat 1 at intervals, the first step pin 8 and the second step pin 9 are used for radial and circumferential limiting, the thrust pad 2 and the retainer 6 are sequentially arranged, and the pin 5 is used for limiting the retainer 6 to prevent the retainer 6 from falling off from the bearing seat 1; the bearing seat 1 is provided with a limiting groove 11 for limiting the axial movement of the thrust pad 2, the thrust pad 2 is circumferentially limited through an arc-shaped limiting flange 10, and the circumferential, radial and axial limiting of the thrust pad 2 is realized by combining the radial limiting effect of the retainer 6, so that the thrust pad 2 can only slightly tilt in all directions but cannot fall off from the bearing body.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.

Claims

1. A tilting pad thrust bearing capable of preventing a thrust pad from falling comprises a bearing seat (1), wherein an installation cavity is formed in one side of the bearing seat (1), a balance block is installed in the installation cavity, and a thrust pad (2) is arranged on one side, far away from the bearing seat, of the balance block, and the tilting pad thrust bearing is characterized in that a first limiting structure and a fourth limiting structure are arranged on the bearing seat (1), a second limiting structure matched with the first limiting structure is arranged on the thrust pad (2), a third limiting structure is arranged on the outer side of the thrust pad (2), a retainer (6) is arranged on the outer side of the thrust pad (2), and the third limiting structure is located between the retainer (6) and the bearing seat (1); the first limiting structure and the fourth limiting structure are respectively arranged above the side wall of the installation cavity, the fourth limiting structure and the thrust pads are alternately arranged, and the retainer (6) is detachably connected with the fourth limiting structure.

2. The tilting pad thrust bearing according to claim 1, wherein said mounting cavity is an annular groove, a plurality of first limiting units are disposed at equal intervals in said annular groove, and a second limiting unit matching with said first limiting units is disposed on said balance weight.

3. The tilting pad thrust bearing according to claim 2, wherein said first limiting unit is a first limiting hole, said second limiting unit is a second limiting hole, the diameter of said first limiting hole is smaller than that of said second limiting hole, and a step pin is disposed in said first limiting hole and said second limiting hole.

4. The tilting pad thrust bearing for preventing the thrust pad from falling off as claimed in claim 3, wherein the inner wall of the bearing seat (1) is provided with an extension section extending along the axial direction of the bearing seat, and the first limiting structure is arranged on the extension section.

5. The tilting pad thrust bearing preventing the thrust pad from falling off as set forth in claim 4, wherein said first limit structure is a limit groove (11) provided on said extension section.

6. The tilting pad thrust bearing preventing the thrust pad from falling off as set forth in claim 5, wherein said second limiting structure is a limiting block (12).

7. The tilting pad thrust bearing for preventing the thrust pad from falling off as set forth in claim 6, wherein said third limiting structure is a flange (10) provided on the outer side of said thrust pad (2); the retainer (6) is arranged on one side, far away from the bearing seat (1), of the flange (10).

8. The tilting pad thrust bearing capable of preventing a thrust pad from falling off as claimed in claim 7, wherein an anti-rotation member is arranged on the outer side of the bearing seat (1), the anti-rotation member is an anti-rotation pin (7), and the bearing seat (1) is connected with the balance block through the anti-rotation pin (7).

9. The tilting pad thrust bearing for preventing the drop of a thrust pad of claim 8 wherein said balance weight is comprised of a plurality of balance units overlapping one another.

10. A tilting pad thrust bearing for preventing the drop of thrust pads according to claim 9, characterized in that said fourth limiting structure is an arc-shaped limiting flange (13) provided at the edge of said bearing housing (1), the number of said arc-shaped limiting flanges (13) being equal to the number of thrust pads (2).