High-performance radial tilting pad bearing

Abstract

The utility model discloses a high-performance radial tilting pad bearing. The high-performance radial tilting pad bearing comprises a bearing body, the tilting-pad bearing has the beneficial effects that the oil spraying pipes are respectively and independently arranged at the bearing pad and the non-bearing pad, and the cooling grooves are formed in the inner wall of the non-bearing pad, so that when the tilting-pad bearing with the structure is used, cooling oil sprayed by the oil spraying pipes can be lubricated by the bearing pad; cooling of the surface of the non-bearing bush is achieved when the bearing bush passes through the cooling groove, meanwhile, heat dissipation grooves are formed in the back of the bearing bush and the back of the non-bearing bush respectively, oil supply holes for supplying oil to the heat dissipation grooves are reserved in the bearing body, cooling oil can be introduced into the heat dissipation grooves through the oil supply holes, and therefore cooling of the bearing bush and the non-bearing bush is achieved. When the tilting-pad bearing with the structure is used, the heat of the tile is conveniently dissipated, the cooling cost of the tile of the tilting-pad bearing is reduced, and the use requirement of the tilting-pad bearing under the working condition that the linear speed is greater than 100m / s is met.

Description

Technical Field

[0001] The utility model relates to the technical field of tilting pad bearings, and particularly relates to a high-performance radial tilting pad bearing. Background Art

[0002] Conventional radial tilting pad bearings can meet certain usage requirements under specific working conditions. However, when facing the harsh working conditions of higher rotational speeds and greater loads, they seem inadequate; for conventional radial tilting pad bearings, when the linear velocity is higher than 100 m / s and the specific pressure exceeds 2 Mpa, the bearing temperature will increase significantly during operation, even exceeding the allowable temperature of the material or the lubricating oil itself.

[0003] The current radial tilting pad bearings are only applicable to working conditions with a linear velocity below 100 m / s. When the linear velocity exceeds 100 m / s, the operating temperature of the bearing is high, and destructive accidents such as burning of the bearing are likely to occur, unable to meet the usage requirements of the main engine; and the current common solution is to replace it with copper-chromium alloy with better heat dissipation performance, which has a high cost, large deformation, and is prone to problems such as oil film stiffness not matching the calculation. Moreover, due to the relatively low hardness of the copper-chromium alloy material itself, a relatively hard pivot is usually designed on the back of the pad for contact and swing, so the structural design is more complex. Summary of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] The technical problem to be solved by the utility model is to provide a high-performance radial tilting pad bearing that can significantly reduce the oil film temperature, thereby reducing the bearing operating temperature, enabling the bearing to operate under more harsh working conditions, effectively replacing the copper pad while reducing costs and having a simpler structure according to the current situation of the prior art.

[0006] (2) Technical Solutions

[0007] The utility model is realized through the following technical solutions: The utility model provides a high-performance radial tilting pad bearing, which includes a bearing body. Two load-carrying pads are symmetrically arranged in the upper part of the bearing body. Three non-load-carrying pads are evenly distributed in a ring shape below the load-carrying pads in the bearing body. Cooling grooves are opened on the inner walls of the non-load-carrying pads. An oil spray pipe is separately arranged on one side of each load-carrying pad and each non-load-carrying pad. Heat dissipation grooves are opened on the outer walls of each load-carrying pad and each non-load-carrying pad. Oil supply holes are opened on the bearing body opposite to the heat dissipation grooves. Sealing covers are symmetrically installed on both sides of the bearing body. Limit screws are installed in the middle of the outer walls of each load-carrying pad and each non-load-carrying pad.

[0008] Furthermore, the load-carrying pads and the non-load-carrying pads are made of the same material, and the load-carrying pads are fixedly connected to the bearing body through the corresponding limit screws.

[0009] By adopting the above technical solution, it can ensure the reliable installation and fixation of the bearing pad on the bearing body, and the bearing pad mainly contacts with the shaft part.

[0010] Furthermore, the cooling groove is of an arc-shaped structure, and the cooling groove is formed on the alloy surface of the non-bearing pad.

[0011] By adopting the above technical solution, the cooling oil ejected from the oil spray pipe does not form a dynamic pressure oil film when passing through the cooling groove, so that the lubricating oil will not be heated either. Therefore, the temperature of the lubricating oil passing through the non-bearing pad will gradually decrease.

[0012] Furthermore, the cooling groove faces the pad surface of the bearing pad, and the depth of the cooling groove is less than half of the thickness of the non-bearing pad.

[0013] By adopting the above technical solution, it can ensure that the hot oil after lubricating the bearing pad can conveniently enter the cooling groove.

[0014] Furthermore, the non-bearing pad is fixedly connected to the bearing body through the corresponding limit screw.

[0015] By adopting the above technical solution, it can ensure the reliable installation and fixation of the non-bearing pad on the bearing body.

[0016] Furthermore, the heat dissipation groove is of a labyrinth structure, and the heat dissipation groove is formed on the corresponding bearing pad and non-bearing pad.

[0017] By adopting the above technical solution, when the externally introduced cooling oil flows through the heat dissipation groove, the heat dissipation groove can be used to cool the bearing pad and the non-bearing pad.

[0018] Furthermore, the heat dissipation groove is communicated with the oil supply hole, and the heat dissipation groove corresponds to the oil supply hole one by one.

[0019] By adopting the above technical solution, cooling oil will be introduced into the heat dissipation groove under the action of the oil supply hole.

[0020] Furthermore, the sealing cover is bolted to the bearing body, and the size of the sealing cover matches the end face size of the bearing body.

[0021] By adopting the above technical solution, the sealing cover is used to seal the lubricating oil on both sides and simultaneously play the role of limiting the bearing pad and the non-bearing pad.

[0022] (III) Beneficial Effects

[0023] The present utility model has the following beneficial effects compared with the prior art:

[0024] To solve the problem that the current tilting pad journal bearing is only applicable to working conditions with a linear velocity below 100 m / s. When the linear velocity exceeds 100 m / s, the operating pad temperature of the bearing is high, and destructive accidents such as pad burning are likely to occur, which cannot meet the usage requirements of the main engine. The currently common solution is to replace it with copper-chromium alloy with better heat dissipation performance. However, the cost is high, the deformation is large, and problems such as oil film stiffness and calculation mismatch are likely to occur. Moreover, due to the relatively low hardness of the copper-chromium alloy material itself, a harder pivot is usually designed on the back of the pad for contact and swing, so the structural design is more complex. In the present utility model, spray oil pipes are separately arranged at the load-bearing pad and the non-load-bearing pad, and cooling grooves are opened on the inner wall of the non-load-bearing pad. When the tilting pad journal bearing with this structure is in use, the cooling oil sprayed out by the spray oil pipe can cool the surface of the non-load-bearing pad when passing through the cooling groove after lubricating the load-bearing pad. At the same time, heat dissipation grooves are respectively opened on the backs of the load-bearing pad and the non-load-bearing pad, and oil supply holes for supplying oil to the heat dissipation grooves are reserved on the bearing body. Cooling oil can be introduced into the heat dissipation grooves through the oil supply holes, so as to cool the load-bearing pad and the non-load-bearing pad, realize convenient heat dissipation of the pads of the tilting pad journal bearing during use, reduce the cooling cost of the pads of the tilting pad journal bearing, and meet the usage requirements of the tilting pad journal bearing under the working condition with a linear velocity greater than 100 m / s. Description of the Drawings

[0025] Figure 1 is an exploded view of a high-performance tilting pad journal bearing according to the present utility model;

[0026] Figure 2 is an internal view of the non-load-bearing pad in a high-performance tilting pad journal bearing according to the present utility model;

[0027] Figure 3 is an external view of the non-load-bearing pad in a high-performance tilting pad journal bearing according to the present utility model;

[0028] Figure 4 is a cross-sectional view of the bearing body in a high-performance tilting pad journal bearing according to the present utility model.

[0029] The description of the reference numerals is as follows:

[0030] 1. Load-bearing pad; 2. Non-load-bearing pad; 3. Spray oil pipe; 4. Bearing body; 5. Sealing cover; 6. Limit screw; 7. Cooling groove; 8. Heat dissipation groove; 9. Oil supply hole. Detailed Embodiment

[0031] In order to make the purpose, technical solution and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0032] As shown Figures 1 - 4 in the figure, a high-performance tilting pad journal bearing in this embodiment includes a bearing body 4. Two load-carrying pads 1 are symmetrically arranged at the upper part inside the bearing body 4. Three non-load-carrying pads 2 are annularly and evenly arranged below the load-carrying pads 1 inside the bearing body 4. Cooling grooves 7 are formed on the inner walls of the non-load-carrying pads 2. A fuel injection pipe 3 is separately arranged on one side of each load-carrying pad 1 and each non-load-carrying pad 2. The fuel injection pipe 3 can ensure the convenient injection of cooling oil onto the load-carrying pads 1 and the non-load-carrying pads 2. The cooling oil sprayed out by the fuel injection pipe 3 does not form a hydrodynamic oil film when passing through the cooling grooves 7, so it will not heat up the lubricating oil either. Therefore, the temperature of the lubricating oil passing through the non-load-carrying pads 2 will gradually decrease. Heat dissipation grooves 8 are formed on the outer walls of each load-carrying pad 1 and each non-load-carrying pad 2. An oil supply hole 9 is formed on the bearing body 4 opposite to the heat dissipation grooves 8. When the cooling oil introduced through the oil supply hole 9 flows through the heat dissipation grooves 8, the heat dissipation grooves 8 can be used to cool down the load-carrying pads 1 and the non-load-carrying pads 2. Sealing covers 5 are symmetrically installed on both sides of the bearing body 4. Limit screws 6 are installed in the middle of the outer walls of each load-carrying pad 1 and each non-load-carrying pad 2.

[0033] As shown Figures 1 - 4 in the figure, in this embodiment, the load-carrying pads 1 and the non-load-carrying pads 2 are made of the same material. The load-carrying pads 1 are fixedly connected to the bearing body 4 through the corresponding limit screws 6, which can ensure the reliable installation and fixation of the load-carrying pads 1 on the bearing body 4. The load-carrying pads 1 are mainly in contact with the shaft parts. The cooling grooves 7 are of an arc structure, and the cooling grooves 7 are formed on the alloy surface of the non-load-carrying pads 2. The cooling grooves 7 face the pad surfaces of the load-carrying pads 1, and the depth of the cooling grooves 7 is less than half of the thickness of the non-load-carrying pads 2, which can ensure the convenient entry of the hot lubricating oil after lubrication of the load-carrying pads 1 into the cooling grooves 7.

[0034] As shown Figures 1 - 4 in the figure, in this embodiment, the non-load-carrying pads 2 are fixedly connected to the bearing body 4 through the corresponding limit screws 6, which can ensure the reliable installation and fixation of the non-load-carrying pads 2 on the bearing body 4. The heat dissipation grooves 8 are of a labyrinth structure. The heat dissipation grooves 8 are formed on the corresponding load-carrying pads 1 and non-load-carrying pads 2. The heat dissipation grooves 8 are communicated with the oil supply holes 9, and the heat dissipation grooves 8 and the oil supply holes 9 are in one-to-one correspondence. Under the action of the oil supply holes 9, cooling oil will be introduced into the heat dissipation grooves 8. The sealing covers 5 are bolted to the bearing body 4. The size of the sealing covers 5 matches the end face size of the bearing body 4. The sealing covers 5 are used to seal the lubricating oil on both sides, and at the same time play a role in limiting the load-carrying pads 1 and the non-load-carrying pads 2.

[0035] The specific implementation process of this embodiment is as follows: When the hot oil after lubricating the load-bearing tile 1 enters the non-load-bearing tile 2, the cold oil sprayed by the oil spray pipe 3 directly passes through the cooling groove 7 on the surface of the non-load-bearing tile 2. Since the lubricating oil passing through the cooling groove 7 does not form a hydrodynamic oil film and thus will not heat up the lubricating oil, the temperature of the lubricating oil passing through the non-load-bearing tile 2 will gradually decrease. When the circulated lubricating oil enters the load-bearing tile 1 again, the inlet oil temperature of the load-bearing tile 1 will be significantly reduced, and the oil film temperature after the load-bearing tile 1 works will also decrease accordingly, thus achieving the effect of reducing the tile temperature. At the same time, heat dissipation grooves 8 are arranged on the back of each load-bearing tile 1 and non-load-bearing tile 2 for cooling, which can further reduce the temperature on the oil outlet side of each tile, thereby further reducing the tile temperature. While reducing the cooling cost of the tilting pad bearing tiles, it meets the usage requirements of this type of tilting pad bearing under the condition that the linear velocity is greater than 100 m / s.

[0036] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-performance tilting pad journal bearing, characterized in that: It includes a bearing body (4), in the upper part of which two bearing pads (1) are symmetrically arranged. Three non-bearing pads (2) are evenly distributed in a ring shape below the bearing pads (1) inside the bearing body (4). Cooling grooves (7) are formed on the inner walls of the non-bearing pads (2). An oil spray pipe (3) is separately arranged on one side of each bearing pad (1) and each non-bearing pad (2). Heat dissipation grooves (8) are formed on the outer walls of each bearing pad (1) and each non-bearing pad (2). An oil supply hole (9) is formed on the bearing body (4) opposite to the heat dissipation groove (8). Sealing covers (5) are symmetrically installed on both sides of the bearing body (4). A limit screw (6) is installed in the middle of the outer wall of each bearing pad (1) and each non-bearing pad (2).

2. The high-performance tilting pad journal bearing according to claim 1, wherein: The bearing pads (1) and the non-bearing pads (2) are made of the same material. The bearing pads (1) are fixedly connected to the bearing body (4) through the corresponding limit screws (6).

3. A high-performance tilting pad journal bearing according to claim 1, characterized in that: The cooling groove (7) is of an arc structure, and the cooling groove (7) is formed on the alloy surface of the non-bearing pad (2).

4. A high-performance tilting pad journal bearing according to claim 1, characterized in that: The cooling groove (7) faces the pad surface of the bearing pad (1), and the depth of the cooling groove (7) is less than half of the thickness of the non-bearing pad (2).

5. The high-performance tilting pad journal bearing according to claim 4, wherein: The non-bearing pads (2) are fixedly connected to the bearing body (4) through the corresponding limit screws (6).

6. The high-performance tilting pad journal bearing according to claim 5, characterized in that: The heat dissipation groove (8) is of a labyrinth structure, and the heat dissipation groove (8) is formed on the corresponding bearing pad (1) and non-bearing pad (2).

7. A high-performance tilting pad journal bearing according to claim 1, characterized in that: The heat dissipation groove (8) is communicated with the oil supply hole (9), and the heat dissipation groove (8) corresponds to the oil supply hole (9) one by one.

8. A high-performance tilting pad journal bearing according to claim 1, characterized in that: The sealing cover (5) is bolted to the bearing body (4), and the size of the sealing cover (5) matches the end face size of the bearing body (4).

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