CN220227502U

CN220227502U - Tilting pad sliding bearing capable of reducing oil demand

Info

Publication number: CN220227502U
Application number: CN202321563687.0U
Authority: CN
Inventors: 赵圆满; 郭富贵; 何思聪; 程楚伟; 张锋; 邓勇
Original assignee: Zhejiang Zhanggui Bearing Technology Co ltd
Current assignee: Zhejiang Zhanggui Bearing Technology Co ltd
Priority date: 2023-06-19
Filing date: 2023-06-19
Publication date: 2023-12-22
Anticipated expiration: 2033-06-19

Abstract

The utility model belongs to the technical field of bearings, and particularly relates to an inclinable tile sliding bearing capable of reducing oil demand, which comprises the following components: a bearing seat; the tiles are arranged on the inner wall of the bearing seat along the circumferential direction; the adjusting cushion blocks are opposite and are distributed on the outer wall of the bearing seat along the circumferential direction; the oil nozzle is arranged in the bearing seat and used for providing lubricating oil for the tile; the oil outlet is formed in the intrados of the tile, and the oil outlet end of the oil nozzle is communicated with the oil outlet after being embedded into the tile. By directly injecting lubricating oil into the oil outlet of the shoe, cold and hot oil flowing out of the bearing bush from the bearing bush can be separated from low-temperature lubricating oil supplied from an oil station, so that the oil demand of the bearing is reduced and the friction loss of the bearing is reduced under the condition of reducing the temperature rise of the shoe.

Description

Tilting pad sliding bearing capable of reducing oil demand

Technical Field

The utility model belongs to the technical field of bearings, and particularly relates to an inclinable tile sliding bearing capable of reducing oil demand.

Background

In large turbine generators, structural bearings such as circular, elliptical, and tilting-type shoes are commonly used. For the tilting pad bearing, the swinging of each pad fulcrum is utilized to adapt to the working position of a rotor, so that each pad can form a convergent oil wedge, the oil wedge formed by the pad and the journal can be automatically adjusted under the condition that the operation parameters (load, speed, lubricating oil viscosity and the like) are changed, and the oil film force generated on each pad passes through the fulcrum and the center of the journal, namely, the external load is always kept at one point, thus a tangential component force for whirling the journal is not generated, and the tilting pad bearing is a bearing bush structure with the most advantageous stability in all radial bearings (including three-oil wedge, four-oil wedge, elliptic bearing, cylindrical bearing) in the aspects of stability, bearing capacity, power consumption, temperature rise and the like. Therefore, the tilting pad bearing is widely applied to the generator set with better stability.

The applicant in 2022-09-02 filed a chinese patent publication No. CN217926755U discloses a heat dissipation structure of a high-speed sliding bearing, the structure is shown in fig. 1, a plurality of oil nozzles 420 are provided, gaps 440 are provided between adjacent arc-shaped tiles 300, and the oil nozzles 420 are installed in the gaps 440 to perform the heat dissipation and lubrication functions on the tiles, however, the heat dissipation of the tiles in this way is not an optimal choice, and therefore, improvement is needed.

Disclosure of Invention

The present utility model is directed to a tilting pad sliding bearing capable of reducing oil demand, so as to solve the above-mentioned problems in the prior art.

In order to achieve the above purpose, the following technical scheme is provided: a tilting pad slide bearing capable of reducing oil demand, comprising:

a bearing seat;

the tiles are arranged on the inner wall of the bearing seat along the circumferential direction;

the adjusting cushion blocks are opposite and are distributed on the outer wall of the bearing seat along the circumferential direction;

the oil nozzle is arranged in the bearing seat and used for providing lubricating oil for the tile;

the oil outlet is formed in the intrados of the tile, and the oil outlet end of the oil nozzle is communicated with the oil outlet after being embedded into the tile.

In the above technical scheme, further, the oil outlet is a bar-shaped notch.

In any of the above technical solutions, further, two ends of the plane of the tile are provided with diversion trenches communicated with the bar-shaped notch.

In any of the above technical solutions, further comprising:

the bearing end covers are provided with two bearing seats and are respectively arranged at two sides of the bearing seats;

and the limiting pin is arranged on the tile and the bearing end cover and used for limiting the tile.

In any of the above technical solutions, further comprising:

the bearing seats are arranged on the inner wall of the bearing seat along the circumferential direction, and the end surfaces of the bearing seats are provided with concave spherical surfaces;

the tile is provided with a supporting part, the supporting surface of the supporting part is a convex spherical surface, the convex spherical surface is contacted with the concave spherical surface, and the radius of the convex spherical surface is smaller than that of the concave spherical surface.

In any of the above technical solutions, further, a plurality of first mounting grooves are formed in the inner wall of the bearing seat along the circumferential direction, and each bearing seat is respectively disposed in each first mounting groove.

In any of the above technical solutions, further, a second mounting groove is formed in an outer arc surface of the tile, the supporting portion is disposed in the second mounting groove, and the convex spherical surface on the supporting portion extends out of the second mounting groove.

The beneficial effects of the utility model are as follows: in regard to the lubrication of the shoe, an oil nozzle is generally arranged on a bearing seat, and then oil is directly sprayed to the shoe through the oil nozzle, so that the problems of low lubrication efficiency and weak cooling effect exist.

Drawings

FIG. 1 is a schematic diagram of a prior art structure;

FIG. 2 is a schematic diagram of the structure of the present utility model;

FIG. 3 is a schematic view of the internal structure of the present utility model;

FIG. 4 is a cross-sectional view of the present utility model;

fig. 5 is an enlarged view at a in fig. 3;

FIG. 6 is an enlarged view at B in FIG. 3;

FIG. 7 is a schematic view of the structure of the bearing block of the present utility model;

FIG. 8 is a schematic view of the structure of the support of the present utility model;

FIG. 9 is a schematic view of the bearing seat and support of the present utility model shown in a separated configuration;

reference numerals: 100. a bearing seat; 110. a first mounting groove; 120. an oil passage; 200. a bearing end cap; 300. the supporting seat; 310. a concave spherical surface; 400. a tile; 410. a support part; 411. a convex spherical surface; 420. a second mounting groove; 430. adjusting the gasket; 440. a slag discharge groove; 450. a diversion trench; 500. a limiting pin; 600. adjusting the cushion block; 610. an oil inlet; 700. an oil nozzle; 710. a first flow passage; 720. and a second flow passage.

Detailed Description

Technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some of the embodiments of the present application, but not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application are within the scope of the protection of the present application.

In the description of the present application, it is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. For ease of description, the dimensions of the various features shown in the drawings are not drawn to actual scale. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the authorization specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Example 1:

as shown in fig. 2 to 9, the present embodiment provides a tilting pad sliding bearing capable of reducing oil demand, comprising:

a bearing housing 100;

the tiles 400 are arranged on the inner wall of the bearing seat 100 along the circumferential direction;

the adjusting cushion blocks 600 are aligned and arranged on the outer wall of the bearing seat 100 along the circumferential direction;

and an oil spray nozzle 700 disposed in the bearing housing 100 for providing lubricating oil to the pads 400;

the bearing seat 100 is internally provided with an oil duct 120, the outer side surface of the adjusting cushion block 600 is provided with an oil inlet 610 which is arranged in a penetrating manner and is communicated with the oil duct 120, the oil inlet end of the oil nozzle 700 is communicated with the oil duct 120, the inner cambered surface of the tile 400 is provided with an oil outlet 440, and the oil outlet end of the oil nozzle 700 is communicated with the oil outlet 440 after being embedded into the tile 400.

In this technical solution, regarding the lubrication of the pad 400, it is now common to provide an oil nozzle 700 on the bearing seat 100, and then directly spray oil to the pad 400 through the oil nozzle 700, which has problems of low lubrication efficiency and weak cooling effect, so that the applicant has improved the installation mode of the oil nozzle 700.

Specifically, four mounting grooves are formed on the inner wall of the bearing seat 100, the oil nozzle 700 is respectively arranged in each mounting groove, the oil nozzle 700 can be arranged into a T-shaped structure, a first flow passage 710 is formed at the end part of the rod part, and then a second flow passage 720 communicated with the first flow passage 710 is formed on the side wall of the rod part; the outer wall of the bearing block 100 is provided with a T-shaped groove which is opened along the radial direction, the outer wall of the tile 400 is provided with a slot, and the slot is communicated with an oil outlet 440 on the intrados of the tile 400.

The oil nozzle 700 is embedded into the T-shaped groove, then the oil nozzle 700 is fixed by a small-sized bolt, in the process of fixing the oil nozzle 700, the inlet of the second flow passage 720 is required to be communicated with the oil passage 120 in the bearing seat 100, and the rod part of the oil nozzle 700 is embedded into the tile 400, so that a communicated flow passage can be formed. On the other hand, when the tile 400 is mounted, the tile 400 can be limited (the tile 400 is limited by the oil nozzle 700), so that the subsequent mounting of the limiting pin 500 is facilitated.

The oil injection mode is as follows: the lubricating oil enters the oil duct 120 in the bearing seat 100 through the oil inlet 610 on the adjusting cushion block 600, then enters the oil nozzle 700, flows from the second flow passage 720 of the oil nozzle 700 to the first flow passage 710, and finally flows to the oil outlet 440 on the intrados of the tile 400.

As shown in fig. 2 and 3, in the present embodiment, the oil outlet 440 is preferably a bar-shaped notch; slag discharging grooves 450 communicated with the strip-shaped notch are also formed at two ends of the plane of the tile 400.

In this technical scheme, through setting the oil-out 440 to the bar notch, this bar notch is offered along axial direction, through directly to the bar notch injection lubricating oil, can let the cold and hot oil of bearing separate (hot oil refers to the oil that is heated after the tile 400 friction generates heat, and cold oil refers to the oil that directly injects to the bar notch through nozzle 700), like this, under the circumstances that has reduced the tile 400 temperature rise, also reduced the oil demand of bearing simultaneously.

Example 2:

the present embodiment provides a tilting pad sliding bearing capable of reducing oil demand, which has the following technical features in addition to the technical scheme including the above embodiment.

As shown in fig. 2 to 9, in this embodiment, the method further includes:

the bearing end caps 200 are provided with two bearing end caps and are respectively arranged at two sides of the bearing seat 100;

the limiting pin 500 is arranged on the tile 400 and the bearing end cover 200 and is used for limiting the tile 400;

the bearing blocks 300 are arranged on the inner wall of the bearing block 100 along the circumferential direction, and the end surfaces of the bearing blocks 300 are provided with concave spherical surfaces 310;

the pad 400 has a supporting portion 410, the supporting surface of the supporting portion 410 is a convex spherical surface 411, the convex spherical surface 411 contacts the concave spherical surface 310, and the radius of the convex spherical surface 411 is smaller than the radius of the concave spherical surface 310.

In this technical solution, regarding the tilting pad sliding bearing, in order to make the pad 400 thereon realize aligning, for this purpose, a supporting portion 410 is provided on the pad 400, a supporting seat 300 is provided on the inner wall of the bearing seat 100, and through the cooperation between a convex spherical surface 411 on the supporting portion 410 and a concave spherical surface 310 on the supporting seat 300, the pad 400 can rotate by 360 degrees, then after the bearing end cover 200 is covered, the pad 400 is limited by a limiting pin 500 along the axial direction, and the pad 400 can only swing along the circumferential direction, thereby realizing the aligning function.

Regarding the radius R1 of the concave spherical surface 310 on the supporting seat 300 and the convex spherical surface 411R2 on the supporting portion 410 of the tile 400, R1 is greater than R2, but R1 and R2 are slightly close, so that the contact pressure stress of the two surfaces can be improved, thereby reducing fatigue cracks generated on the two surfaces and reducing the risk of fatigue pitting. Simultaneously, two mutually attached spherical surfaces can realize the aligning function of the whole bearing.

Example 3:

As shown in fig. 4 and 5, in the present embodiment, the inner wall of the bearing housing 100 has a plurality of first mounting grooves 110 formed in the circumferential direction, and each bearing block 300 is disposed in each first mounting groove 110. The outer arc surface of the tile 400 is provided with a second mounting groove 420, the supporting part 410 is arranged in the second mounting groove 420, and the convex spherical surface 411 on the supporting part 410 extends out of the second mounting groove 420.

In the present solution, the bearing block 300 is fixed in the first mounting groove 110 by a bolt by forming the first mounting groove 110 on the inner wall of the bearing block 100; by providing the second installation groove 420 on the outer arc surface of the tile 400, the supporting part 410 is arranged in the second installation groove 420 through the bolt, and the installation strength can be improved by adopting the installation mode, and the assembly is very convenient.

In this embodiment, an adjusting spacer 430 is further disposed in the second mounting groove 420, and the adjusting spacer 430 is used to adjust the length of the supporting portion 410 extending out of the second mounting groove 420, so as to change the gap between the tile 400 and the bearing housing 100.

In this technical solution, the thickness of the single tile 400 can be adjusted by arranging the adjusting spacer 430 in the second mounting groove 420, so as to meet the requirement of adjusting the gap of the single tile 400.

The embodiments of the present application and the features of the embodiments may be combined without conflict, and the present application is not limited to the specific embodiments described above, which are merely illustrative, not restrictive, and many forms may be made by those of ordinary skill in the art, without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.

Claims

1. A tilting pad slide bearing capable of reducing oil demand, comprising:

a bearing block (100);

the tiles (400) are provided with a plurality of tiles and are distributed on the inner wall of the bearing seat (100) along the circumferential direction;

the adjusting cushion blocks (600) are arranged oppositely and are distributed on the outer wall of the bearing seat (100) along the circumferential direction;

and an oil nozzle (700) disposed in the bearing housing (100) for providing lubricating oil to the pad (400);

wherein, be provided with oil duct (120) in bearing frame (100), the lateral surface of adjustment cushion (600) have run through set up and with oil inlet (610) that oil duct (120) are linked together, the oil feed end and the oil duct (120) of fuel sprayer (700) are linked together, have seted up oil-out (440) on the intrados of tile (400), the oil-out end of fuel sprayer (700) is linked together with its oil-out (440) after embedding in tile (400).

2. A tilting pad sliding bearing capable of reducing oil demand according to claim 1, characterized in that the oil outlet (440) is a bar-shaped notch.

3. The tilting pad sliding bearing capable of reducing oil demand according to claim 2, wherein the two planar ends of the pad (400) are further provided with guide grooves (450) communicated with the strip-shaped notch.

4. A tilting pad sliding bearing according to any of claims 1-3 and also comprising:

the bearing end covers (200) are provided with two bearing seats (100) and are respectively arranged at two sides of the bearing seats;

and the limiting pin (500) is arranged on the tile (400) and the bearing end cover (200) and is used for limiting the tile (400).

5. The tilting pad sliding bearing capable of reducing oil demand according to claim 4, further comprising:

the bearing blocks (300) are arranged on the inner wall of the bearing block (100) along the circumferential direction, and the end surfaces of the bearing blocks (300) are provided with concave spherical surfaces (310);

the tile block (400) is provided with a supporting part (410), the supporting surface of the supporting part (410) is a convex spherical surface (411), the convex spherical surface (411) is in contact with the concave spherical surface (310), and the radius of the convex spherical surface (411) is smaller than that of the concave spherical surface (310).

6. The tilting pad sliding bearing capable of reducing oil demand according to claim 5, wherein a plurality of first mounting grooves (110) are formed in the inner wall of the bearing housing (100) along the circumferential direction, and each bearing seat (300) is respectively disposed in each first mounting groove (110).

7. The tilting pad sliding bearing capable of reducing oil demand according to claim 5, wherein a second mounting groove (420) is formed on an outer arc surface of the pad (400), the supporting portion (410) is disposed in the second mounting groove (420), and a convex spherical surface (411) on the supporting portion (410) extends out of the second mounting groove (420).