A high-speed sliding bearing

Abstract

The present application discloses a high-speed sliding bearing, which relates to the technical field of bearings, and includes: a bearing body, wherein a plurality of swing grooves are arranged at intervals inside the bearing body, and a connecting groove is connected in the middle of the swing groove; an oil seal, wherein the oil seal is connected to both sides of the bearing body; a plurality of tiles, wherein the tiles are arranged in the swing groove; a connecting part, wherein the connecting part is arranged in the connecting groove and is integrally formed between the bearing body and the middle of the tile, and a swing gap is arranged between the tile and the inner wall of the swing groove and between the connecting part and the inner wall of the connecting groove. The tile of the present application is integrally formed with the bearing body, and a swing gap for the tile to move can be formed by laser cutting process, so that the stability of the overall structure is improved, and it can be applied to occasions where the rotation speed exceeds 15,000 revolutions.

Description

Technical Field

[0001] The present application relates to the technical field of bearings, and in particular to a high-speed sliding bearing. Background Art

[0002] Bearings are common mechanical parts used to reduce friction between moving parts, determine the position of moving parts, and control their motion accuracy. Bearings can be divided into rolling bearings and sliding bearings according to their friction properties. Among them, sliding bearings support the rotating shaft through a smooth surface. The sliding surfaces are separated by lubricating oil without direct contact. They have the advantages of stable operation, low noise, and strong load-bearing capacity. Compared with rolling bearings, they are more suitable for high-speed shafts. Therefore, sliding bearings are often used in high-speed mechanical equipment such as centrifugal compressors and high-speed pumps.

[0003] Sliding bearings can be divided into round bearings, elliptical bearings, tilting pad bearings, etc. according to the bearing structure. Among them, the tilting pad bearing is also called the swing bearing bearing, which includes multiple arc-shaped pads that can tilt freely on the fulcrum. During operation, as the speed, load and bearing temperature change, the pads can swing freely, thus forming multiple oil wedges around the shaft diameter. Therefore, the tilting pad bearing has high stability and good vibration reduction.

[0004] However, since the pads of the tilting pad bearings are supported in the bearing body only by the spherical pins and washers on the back side thereof, the connection stability is still insufficient, especially in applications where the rotation speed exceeds 15,000 rpm. Summary of the invention

[0005] In order to further improve working stability, the present application provides a high-speed sliding bearing.

[0006] The high-speed sliding bearing provided in this application adopts the following technical solution:

[0007] A high-speed sliding bearing, comprising:

[0008] A bearing body, wherein a plurality of swing grooves are arranged at intervals inside the bearing body, and a connecting groove is connected to the middle of the swing groove;

[0009] Oil seals, the oil seals are connected to both sides of the bearing body;

[0010] A plurality of tiles, wherein the tiles are arranged in the swing groove;

[0011] The connecting part is arranged in the connecting groove and is integrally formed between the bearing body and the middle part of the tile. A swing gap is arranged between the tile and the inner wall of the swing groove and between the connecting part and the inner wall of the connecting groove.

[0012] By adopting the above technical solution, the pad and the bearing body are formed in one piece, and a swing gap for the pad to move can be formed through a laser cutting process, so that the overall structural stability is improved and can be used in occasions where the rotation speed exceeds 15,000 rpm.

[0013] Metal has the ability to deform elastically. The connection part can deform during operation, causing the pad to move slightly in the swing groove. The oil wedge formed between the pad and the journal can automatically adjust to a suitable shape when the operating parameters (such as load, speed, lubricating oil viscosity, etc.) change, ensuring the stability and load-bearing capacity of the oil film, thereby improving the service life and reliability of the bearing.

[0014] Optionally, a bearing liner is provided on the inner side of the pad block, the thickness of the bearing liner is 1.5-1.8 mm, and the bearing liner is made of tin-based babbitt alloy.

[0015] By adopting the above technical solutions, the tin-based babbitt alloy has high strength, high toughness, good plasticity and low friction coefficient. It is an ideal material for bearing linings and performs well in applications that need to withstand high speeds, high pressures and impact loads.

[0016] Optionally, the width of the swing gap is consistent at all locations and is 0.4-0.6 mm, the connecting portion is an inwardly concave arc surface relative to two side surfaces, and the minimum width of the connecting portion is 1.3-1.7 mm.

[0017] By adopting the above technical solution, the larger the swing gap width, the larger the movable space of the tile, the larger the adaptive adjustment range, but the connection part is prone to excessive deformation and cracks; the smaller the swing gap width, the smaller the movable space of the tile, the smaller the adaptive adjustment range, and the lack of practicality. The present application preferably selects the width range of the swing gap to ensure that the high-speed sliding bearing of the present application can not only adapt to different working conditions, work reliably and stably, but also is not prone to failure and has a long service life.

[0018] The shape of the connection part is also optimized, combining good fatigue resistance and elastic deformation capacity, ensuring long-term stable operation without fatigue cracks.

[0019] Optionally, a side of the tile facing away from the connecting portion protrudes out of the swing groove, an oil groove is formed between adjacent tiles, and the bearing body is provided with an oil inlet hole connected to the oil groove.

[0020] By adopting the above technical solution, the lubricating oil enters the oil groove through the oil inlet hole and then acts evenly on the journal surface. The lubricating oil also enters the swing clearance to reduce the direct contact between metals.

[0021] Optionally, the two side surfaces of the tile close to the oil seal are give-way surfaces, and there is a gap between the give-way surfaces and the oil seal. Annular grooves connected to the swing groove are arranged on both sides of the bearing body, and the annular grooves are connected to a groove, and the groove is connected to the connecting groove. The bottom wall of the annular groove, the bottom wall of the groove and the give-way surface are arranged flush.

[0022] By adopting the above technical solution, the tile will not rub against the oil seal when it moves, thus ensuring working stability and reliability.

[0023] Optionally, the oil seal is penetrated by an observation hole facing the connecting portion, a lens is arranged in the observation hole, and the lens comprises a sleeve, a flat lens connected to one end of the sleeve close to the connecting portion, and a magnifying lens connected to one end of the sleeve away from the connecting portion.

[0024] By adopting the above technical solution, when the bearing is regularly inspected, the condition of the connection part can be observed through the lens without disassembling the bearing for inspection, which is convenient and quick. If the connection part shows obvious fatigue abnormality, it can be easily discovered in time. The flat lens covers the entire observation field without distortion, and the magnifying lens plays the role of magnifying observation, making cracks easier to observe.

[0025] Optionally, a slide bar is connected to one side of the sleeve, and a slide groove is provided on the inner wall of the observation hole for the slide bar to be inserted and slide. The slide bar is threadedly connected to an adjusting screw, the axis of the adjusting screw is parallel to the axis of the sleeve, and the adjusting screw is rotatably connected to the inner wall of the slide groove.

[0026] By adopting the above technical solution, in order to avoid the lubricating oil between the lens and the connection part affecting the observation, the adjusting screw is turned to drive the lens close to the bearing, squeeze out the lubricating oil, and then the connection part can be observed. After the inspection is completed, the adjusting screw is turned in the opposite direction to make the lens away from the connection part without affecting the movement of the tile.

[0027] Optionally, two side surfaces of the tile close to the inner wall of the swing groove are limiting surfaces, and the axis center line of the bearing body is on the plane where the limiting surfaces are located.

[0028] By adopting the above technical solution, the tile is wide outside and narrow inside, and is constrained by the swing groove.

[0029] Optionally, the bearing body includes a first seat body and a second seat body connected to each other.

[0030] Optionally, the tiles are provided in four numbers and are respectively the first tile, the second tile, the third tile and the fourth tile, wherein the first tile and the second tile are both provided on the first seat body, the third tile and the fourth tile are both provided on the second seat body, and the first tile and the third tile are provided opposite to each other;

[0031] When the first base body and the second base body are separated, the side surface of the first tile close to the fourth tile and the side surface of the third tile close to the second tile are completely exposed.

[0032] By adopting the above technical solution, the bearing of the present application is of split type, which is convenient for production and processing.

[0033] In summary, the present application has the following beneficial effects: the pad and the bearing body are integrally formed, and a swing gap for the pad to move can be formed through a laser cutting process, so that the overall structural stability is improved and can be used in occasions where the rotation speed exceeds 15,000 rpm. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a front view schematic diagram of a high-speed sliding bearing according to Example 1 of the present application;

[0035] Figure 2 is a front view schematic diagram of the high-speed sliding bearing of Example 1 of the present application after the oil seal is removed;

[0036] Figure 3 yes Figure 2 A magnified schematic diagram of the middle A area;

[0037] Figure 4 yes Figure 2 Schematic cross-sectional view along line BB;

[0038] Figure 5 is a side view schematic diagram of a high-speed sliding bearing according to Example 1 of the present application;

[0039] Figure 6 yes Figure 5 Schematic cross-sectional view along line CC;

[0040] Figure 7 It is a schematic cross-sectional view of the oil seal of Example 2 of the present application.

[0041] Explanation of the reference numerals in the accompanying drawings: 1. bearing body; 11. swing groove; 12. connecting groove; 13. oil inlet hole; 14. annular groove; 15. groove; 101. first seat body; 102. second seat body; 2. oil seal; 21. observation hole; 22. slide groove; 23. adjusting screw; 3. tile; 31. clearance surface; 32. limit surface; 301. first tile; 302. second tile; 303. third tile; 304. fourth tile; 4. connecting part; 41. arc surface; 5. swing gap; 6. bearing bushing; 7. oil groove; 8. lens; 81. sleeve; 82. flat lens; 83. magnifying lens; 84. slide bar. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1-7 This application is described in further detail.

[0043] The embodiment of the present application discloses a high-speed sliding bearing.

[0044] Embodiment 1:

[0045] Reference Figure 1 A high-speed sliding bearing comprises a bearing body 1 and an oil seal 2. The shaft passes through the middle of the bearing body 1. Two oil seals 2 are provided and are respectively located on both sides of the bearing body 1. The oil seal 2 is fixedly connected to the bearing body 1 by a fastening screw (not shown in the drawings).

[0046] Reference Figure 1 , Figure 2 The bearing body 1 of the embodiment of the present application adopts a split structure, that is, the bearing body 1 includes a first seat body 101 and a second seat body 102, and the first seat body 101 and the second seat body 102 are both semicircular. Positioning columns are fixedly connected to both ends of the first seat body 101 on the side close to the second seat body 102, and the second seat body 102 is provided with a positioning groove for the positioning column to be inserted, so as to facilitate installation and positioning. The first seat body 101 and the second seat body 102 are fixedly connected by fasteners. Correspondingly, the oil seal 2 also adopts a split structure, that is, it is composed of two arc-shaped covers.

[0047] Reference Figure 2 , Figure 3 Four tiles 3 are arranged at equal intervals around the axis of the inner side of the bearing body 1, and four swing grooves 11 are arranged at equal intervals on the inner side of the bearing body 1. The tiles 3 are arranged in the swing grooves 11 one by one. A connecting groove 12 is connected to the middle of the swing groove 11, and both ends of the swing groove 11 and the connecting groove 12 near the oil seal 2 are through-set. A connecting portion 4 is arranged on the inner side of the connecting groove 12, and the connecting portion 4 is integrally formed between the tile 3 and the bearing body 1. A swing gap 5 is arranged between the tile 3 and the inner wall of the swing groove 11 and between the connecting portion 4 and the inner wall of the connecting groove 12. The connecting portion 4 can be elastically deformed, and the swing gap 5 provides space for the tile 3 to move. Therefore, the oil wedge formed between the tile 3 and the journal can automatically adjust to a suitable shape when the operating parameters change, ensuring the stability and load-bearing capacity of the oil film, thereby improving the service life and reliability of the bearing, and can be used in occasions where the speed exceeds 15,000 revolutions.

[0048] Reference Figure 2, the four tiles 3 are respectively the first tile 301, the second tile 302, the third tile 303 and the fourth tile 304. The first tile 301 and the second tile 302 are both arranged on the first base 101, and the third tile 303 and the fourth tile 304 are both arranged on the second base 102. It should be noted that the first tile 301 and the third tile 303 are arranged opposite to each other, and the second tile 302 and the fourth tile 304 are arranged opposite to each other. When the first base 101 and the second base 102 are separated, the side of the first tile 301 close to the fourth tile 304 and the side of the third tile 303 close to the second tile 302 are completely exposed, that is, the swing groove 11 where the first tile 301 and the third tile 303 are located is formed between the first base 101 and the second base 102, so as to facilitate production and processing.

[0049] Reference Figure 3 The inner side of the pad 3 is fixedly connected with a bearing bushing 6, which is made of tin-based babbitt alloy and performs well in applications that need to withstand high speed, high pressure and impact loads. The thickness of the bearing bushing 6 is 1.5-1.8 mm. In the embodiment of the present application, the thickness of the bearing bushing 6 is 1.8 mm.

[0050] Reference Figure 3 , the width of the swing gap 5 is consistent at all places and is 0.4-0.6mm. In the embodiment of the present application, the width of the swing gap 5 is 0.5mm. The two opposite sides of the connecting portion 4 are inwardly concave arc surfaces 41, so that the width of the connecting portion 4 gradually increases from the middle to the two ends, and the minimum width of the connecting portion 4 is 1.3-1.7mm. In the embodiment of the present application, the minimum width of the connecting portion 4 is 1.5mm. The width of the swing gap 5 and the shape and size of the connecting portion 4 are optimized, so that the bearing works reliably and stably and has a long service life.

[0051] Reference Figure 2 , Figure 4 The side of the pad 3 away from the connection part 4 protrudes from the swing groove 11, an oil groove 7 is formed between adjacent pads 3, and the bearing body 1 is provided with an oil inlet hole 13 connected to the oil groove 7. The lubricating oil enters the oil groove 7 through the oil inlet hole 13, and then acts evenly on the surface of the journal. The lubricating oil will also enter the swing gap 5 to reduce the direct contact between metals.

[0052] Reference Figure 3 The two side surfaces of the tile 3 close to the oil seal 2 are the yielding surfaces 31, and the two side surfaces of the tile 3 close to the inner wall of the swing groove 11 are the limiting surfaces 32. The yielding surfaces 31 and the limiting surfaces 32 are both planes, and the inner and outer side surfaces of the tile 3 are both arc surfaces.

[0053] Reference Figure 1 , Figure 3 and Figure 4, annular grooves 14 connected to the swing groove 11 are arranged on both sides of the bearing body 1, and the annular grooves 14 are connected to the grooves 15. The grooves 15 are semicircular and connected to the connecting grooves 12. The bottom wall of the annular groove 14, the bottom wall of the groove 15 and the clearance surface 31 are arranged flush, so that there is a gap between the clearance surface 31 and the oil seal 2. When the shoe block 3 moves, there will be no friction with the oil seal 2, thereby ensuring working stability and reliability.

[0054] Reference Figure 6 The axis line of the bearing body 1 is located on the plane where the limiting surface 32 is located, and the shoe block 3 is wide outside and narrow inside, and is constrained by the swing groove 11.

[0055] The implementation principle of the high-speed sliding bearing of the embodiment of the present application is:

[0056] During operation, the shoe 3 can move slightly in the swing groove 11, so that the oil wedge formed between the shoe 3 and the journal can automatically adjust to a suitable shape when the operating parameters change.

[0057] Embodiment 2:

[0058] The only difference from the first embodiment is that a lens 8 structure is added to facilitate the inspection of the fatigue condition of the connecting portion 4 .

[0059] Reference Figure 3 , Figure 7 The oil seal 2 is provided with an observation hole 21 which is directly opposite to the connection part 4, and a lens 8 is provided in the observation hole 21. The lens 8 includes a sleeve 81, a plain lens 82 fixedly connected to one end of the sleeve 81 close to the connection part 4, and a magnifying lens 83 fixedly connected to one end of the sleeve 81 away from the connection part 4. The plain lens 82 covers the entire observation field without distortion, and the magnifying lens 83 plays a role of magnifying observation, so that the cracks are easier to observe.

[0060] The sleeve 81 can be inserted into the groove 15, and a slide bar 84 is fixedly connected to one side of the sleeve 81. The inner wall of the observation hole 21 is provided with a slide groove 22 for the slide bar 84 to be inserted and slided. The slide bar 84 is threadedly connected with an adjusting screw 23. The axis of the adjusting screw 23 is parallel to the axis of the sleeve 81, and the adjusting screw 23 is rotatably connected to the inner wall of the slide groove 22. When the bearing is regularly inspected, the adjusting screw 23 is screwed to drive the lens 8 close to the bearing to squeeze out the lubricating oil in the groove 15. The condition of the connecting part 4 can be observed through the lens 8 without disassembly for inspection, which is convenient and quick. If the connecting part 4 shows obvious fatigue abnormality, it is easy to find it in time. After the inspection is completed, the adjusting screw 23 is screwed in the opposite direction to make the lens 8 away from the connecting part 4 without affecting the movement of the tile 3.

[0061] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-speed sliding bearing, characterized in that: include: A bearing body (1), wherein a plurality of swing grooves (11) are arranged at intervals inside the bearing body (1), and a connecting groove (12) is connected to the middle of the swing groove (11); An oil seal (2), wherein the oil seal (2) is connected to both sides of the bearing body (1); A plurality of tiles (3), wherein the tiles (3) are arranged in the swing groove (11); A connecting portion (4), the connecting portion (4) being arranged in the connecting groove (12) and being integrally formed between the bearing body (1) and the middle portion of the shoe (3), a swing gap (5) being arranged between the shoe (3) and the inner wall of the swing groove (11) and between the connecting portion (4) and the inner wall of the connecting groove (12); The side of the shoe (3) facing away from the connecting portion (4) protrudes out of the swing groove (11), an oil groove (7) is formed between adjacent shoe blocks (3), and the bearing body (1) is provided with an oil inlet hole (13) connected to the oil groove (7); The two side surfaces of the tile (3) close to the oil seal (2) are clearance surfaces (31), and a gap is provided between the clearance surfaces (31) and the oil seal (2). The two sides of the bearing body (1) are provided with annular grooves (14) connected to the swing groove (11), and the annular groove (14) is connected to a groove (15), and the groove (15) is connected to the connecting groove (12). The bottom wall of the annular groove (14), the bottom wall of the groove (15) and the clearance surface (31) are arranged flush with each other. The oil seal (2) is provided with an observation hole (21) which is directly opposite to the connecting portion (4), and a lens (8) is provided in the observation hole (21). The lens (8) comprises a sleeve (81), a plain lens (82) connected to an end of the sleeve (81) close to the connecting portion (4), and a magnifying lens (83) connected to an end of the sleeve (81) far from the connecting portion (4); A slide bar (84) is connected to one side of the sleeve (81), and a slide groove (22) is provided on the inner wall of the observation hole (21) for the slide bar (84) to be inserted and slided. The slide bar (84) is threadedly connected to an adjusting screw (23), the axis of the adjusting screw (23) is parallel to the axis of the sleeve (81), and the adjusting screw (23) is rotatably connected to the inner wall of the slide groove (22).

2. The high-speed sliding bearing according to claim 1, characterized in that: A bearing bushing (6) is arranged inside the bushing block (3); the thickness of the bearing bushing (6) is 1.5-1.8 mm, and the bearing bushing (6) is made of tin-based babbitt alloy.

3. The high-speed sliding bearing according to claim 1, characterized in that: The width of the swing gap (5) is consistent at all locations and is 0.4-0.6 mm. The two side surfaces of the connecting portion (4) are inwardly concave arc surfaces (41). The minimum width of the connecting portion (4) is 1.3-1.7 mm.

4. The high-speed sliding bearing according to claim 1, characterized in that: The two side surfaces of the tile (3) close to the inner side wall of the swing groove (11) are limiting surfaces (32), and the axis of the bearing body (1) is located on the plane where the limiting surfaces (32) are located.

5. The high-speed sliding bearing according to claim 1, characterized in that: The bearing body (1) comprises a first seat body (101) and a second seat body (102) which are connected to each other.

6. The high-speed sliding bearing according to claim 1, characterized in that: The tiles (3) are provided in four pieces and are respectively a first tile (301), a second tile (302), a third tile (303) and a fourth tile (304), wherein the first tile (301) and the second tile (302) are both provided on the first base body (101), the third tile (303) and the fourth tile (304) are both provided on the second base body (102), and the first tile (301) and the third tile (303) are provided opposite to each other; When the first base body (101) and the second base body (102) are separated, the side surface of the first tile (301) close to the fourth tile (304) and the side surface of the third tile (303) close to the second tile (302) are completely exposed.

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