Tilting-pad thrust bearing with efficient cooling function

Abstract

The tilting-pad thrust bearing with the efficient cooling function comprises a tilting-pad thrust bearing body and thrust pads fixedly arranged in the tilting-pad thrust bearing body, an oil nozzle assembly is fixedly arranged between every two adjacent thrust pads, each oil nozzle assembly comprises an oil nozzle seat body, an oil inlet is formed in the bottom of each oil nozzle seat body, and an oil outlet is formed in the bottom of each oil nozzle seat body. An oil inlet channel is formed in the tilting-pad thrust bearing body, the upper end of the oil inlet is communicated with the oil inlet channel, and the lower end of the oil inlet is communicated with a lubricating oil inlet formed in the tilting-pad thrust bearing body; a plurality of through oil injection holes are uniformly formed in the oil injection nozzle seat body, the lower ends of the oil injection holes are communicated with the oil inlet channel, and the upper ends of the oil injection holes are fixedly connected with nozzles; an oil drainage groove is formed in the upper end of the oil nozzle seat body, an oil baffle is fixedly arranged at the upper end of the oil nozzle seat body, the oil baffle is located between the nozzle and the oil drainage groove, and the oil drainage groove is communicated with a lubricating oil outlet formed in the tilting-pad thrust bearing body. Cold oil and hot oil can be effectively separated, the working temperature of the surfaces of the pads is reduced, and the problem that the temperature of the bearing is too high at a high speed and under high load is solved.

Description

Technical Field

[0001] The utility model relates to a bearing, in particular to a tilting pad thrust bearing with an efficient cooling function. Background Art

[0002] As one of the core components of rotating machinery, the performance of the bearing directly affects the safe, stable and efficient operation of the entire equipment. With the development of technology, mechanical equipment is developing towards high speed, high load and high precision, which puts forward higher requirements for the performance of the bearing, especially the heat dissipation performance.

[0003] Under the conditions of high speed and high load, the tilting pad thrust bearing is prone to generate a large amount of heat. If the heat cannot be dissipated in time and effectively, the bearing temperature will continue to rise, resulting in lubrication failure of the lubricating oil at least, and bearing burnout at worst, thus affecting the normal operation of the equipment. Therefore, when designing the tilting pad thrust bearing, a suitable oil supply method should be selected to reduce the working temperature of the tilting pad thrust bearing.

[0004] When the existing tilting pad thrust bearing is working, the hot oil at the oil outlet directly mixes with the cold oil and enters the next thrust pad. Under extreme working conditions, the temperature of the lubricating oil will continue to rise, resulting in a decrease in the viscosity of the lubricating oil, making it difficult to form an effective oil film to protect the bearing, increasing the wear of the bearing, and seriously affecting the normal operation and service life of the tilting pad thrust bearing.

[0005] Therefore, how to design the structure of the nozzle assembly of the tilting pad thrust bearing to achieve effective separation of cold oil and hot oil and give full play to the cooling effect of the lubricating oil is the key to improving the operating performance of the tilting pad thrust bearing. Summary of the Invention

[0006] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a tilting pad thrust bearing with an efficient cooling function, which can effectively separate cold oil and hot oil, reduce the temperature of the lubricating oil on the surface of the pad, and improve the service life of the bearing.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions to implement:

[0008] A tilting pad thrust bearing with an efficient cooling function includes a tilting pad thrust bearing body, at least two thrust pads are fixedly installed inside the tilting pad thrust bearing body, and a nozzle assembly is fixedly installed between two adjacent thrust pads;

[0009] The nozzle assembly includes a nozzle seat body fixedly connected to two adjacent thrust pads. An oil inlet is opened at the bottom of the nozzle seat body, and an oil inlet channel is opened inside it. The upper end of the oil inlet is communicated with the oil inlet channel, and the lower end of the oil inlet is communicated with the lubricating oil inlet opened on the tilting pad thrust bearing body;

[0010] The fuel injection nozzle seat body is evenly provided with a number of through fuel injection holes, the lower ends of the fuel injection holes are communicated with the oil inlet passage, and the upper ends of the fuel injection holes are fixedly connected with a nozzle head;

[0011] An oil drain groove is formed in the upper end of the fuel injection nozzle seat body, and an oil baffle is fixedly installed. The oil baffle is located between the nozzle head and the oil drain groove, and the oil drain groove is communicated with the lubricating oil outlet formed in the tilting pad thrust bearing body.

[0012] Further, first grooves are formed in the opposite surfaces of two adjacent thrust pads;

[0013] Both sides of the middle part of the fuel injection nozzle seat body are provided with first bosses, and the first bosses are fixedly inserted into the first grooves.

[0014] Further, a pair of second grooves are formed in the tilting pad thrust bearing body;

[0015] Both sides of the bottom of the fuel injection nozzle seat body are provided with second bosses, and the second bosses are fixedly inserted into the second grooves.

[0016] Further, positioning pin holes are formed in one end of the fuel injection nozzle seat body and the tilting pad thrust bearing body, and a positioning pin passes through the positioning pin holes to fixedly connect the fuel injection nozzle seat body and the tilting pad thrust bearing body.

[0017] Further, the top end of the nozzle head is an elbow with an angle of 45° to 80°.

[0018] Further, the top end of the nozzle head is made of a thermosensitive material.

[0019] Further, the side of the oil baffle close to the oil drain groove is an inclined surface.

[0020] Further, the oil inlet passage penetrates through one side of the fuel injection nozzle seat body, and plugging screws are fixedly connected to both ends of the oil inlet passage.

[0021] Compared with the prior art, the utility model has the following technical effects:

[0022] The utility model stores the low-temperature lubricating oil filled from the oil inlet through the oil inlet passage. The low-temperature cold lubricating oil is sprayed onto the surface of the thrust pad block through the spray holes and the nozzle in sequence, playing a role in lubricating and cooling the thrust pad block. The lubricating oil heated by the surface temperature of the thrust pad block is blocked by the oil baffle and flows into the oil drain groove, and then is discharged from the lubricating oil outlet opened on the tilting pad thrust bearing body, taking away the heat on the surface of the thrust pad block, preventing the hot lubricating oil from entering the next bearing bush and mixing with the cold lubricating oil. At the same time, the oil baffle is arranged between the nozzle and the oil drain groove, which can not only better guide the lubricating oil into the oil drain groove, but also more effectively block the hot lubricating oil and the cold lubricating oil, preventing the hot lubricating oil from overflowing to the vicinity of the nozzle. In short, the utility model separates the cold lubricating oil and the hot lubricating oil, effectively reduces the temperature of the lubricating oil on the surface of the pad block, can effectively prevent the tilting pad thrust bearing from being damaged due to excessive working temperature, and prolongs the service life of the tilting pad thrust bearing.

[0023] The top end of the nozzle of the utility model is made of a thermosensitive material. When the temperature of the lubricating oil is too high, the aperture of the nozzle increases, and the amount of lubricating oil sprayed out increases, thereby taking away more heat. When the temperature of the lubricating oil is low, the aperture of the nozzle decreases, and the amount of lubricating oil sprayed out decreases, saving the usage amount of the lubricating oil while ensuring the normal operation of the bearing. In addition, the top end of the nozzle is an elbow with an angle of 45° to 80°, which is more conducive to spraying the lubricating oil onto the surface of the thrust pad block.

[0024] One side of the oil baffle of the utility model close to the oil drain groove is an inclined plane, which not only plays a role in guiding the hot lubricating oil, but also reduces the friction between the oil baffle and the rotating shaft neck, reduces the wear of the rotating shaft, and makes the rotating shaft run more smoothly.

[0025] The utility model penetrates the nozzle seat body to open an oil inlet passage, and then seals both ends of the oil inlet passage through a plugging plug to prevent oil leakage, which is more convenient and efficient compared with processing the oil inlet passage through other methods. Description of the Drawings

[0026] Figure 1 It is a schematic diagram of the overall structure of the tilting pad thrust bearing;

[0027] Figure 2 It is a schematic diagram of the sectional structure of the tilting pad thrust bearing;

[0028] Figure 3 It is a schematic diagram of the three-dimensional structure of the nozzle assembly of the utility model;

[0029] Figure 4 It is a schematic diagram of the side view structure of the nozzle assembly of the utility model;

[0030] Figure 5 is Figure 4 The sectional view at A-A in;

[0031] Figure 6 This is a top view structural schematic diagram of the fuel injector assembly of the present utility model;

[0032] Figure 7 is Figure 6 a cross-sectional view taken along line B-B in

[0033] In the figure: 1, tilting pad thrust bearing body; 2, thrust pad; 3, fuel injector assembly; 31, nozzle; 32, fuel injector seat body; 33, plugging screw; 321, oil baffle; 322, oil drain groove; 323, oil inlet; 324, oil inlet passage; 325, positioning pin hole. Specific embodiments

[0034] The following further elaborates and explains the specific content of the present utility model in detail in conjunction with embodiments.

[0035] As Figure 1 shown, a tilting pad thrust bearing with an efficient cooling function includes a tilting pad thrust bearing body 1, at least two thrust pads 2 are fixedly installed inside the tilting pad thrust bearing body 1, and a fuel injector assembly 3 is fixedly installed between two adjacent thrust pads 2;

[0036] As Figures 1 to 7 shown, the fuel injector assembly 3 includes a fuel injector seat body 32 arranged between two adjacent thrust pads 2, first bosses are provided on both sides in the middle of the fuel injector seat body 32, first grooves are formed on the opposite surfaces of two adjacent thrust pads 2, and the first bosses are fixedly inserted into the first grooves, thereby realizing the circumferential positioning of the thrust pad 2 and the fuel injector seat body 32;

[0037] A pair of second grooves are formed in the tilting pad thrust bearing body 1, second bosses are provided on both sides at the bottom of the fuel injector seat body 32, and the second bosses are fixedly inserted into the second grooves to realize the radial positioning of the thrust pad 2 and the fuel injector seat body 32;

[0038] In order to prevent the fuel injector assembly 3 from generating radial movement relative to the tilting pad thrust bearing body 1, positioning pin holes 325 are formed at one end of the fuel injector seat body 32 and the tilting pad thrust bearing body 1, and a positioning pin passes through the positioning pin holes 325 to fixedly connect the fuel injector seat body 32 and the tilting pad thrust bearing body 1, which can prevent the fuel injector seat body 32 from moving radially due to loosening between the first bosses and the first grooves and between the second bosses and the second grooves;

[0039] An oil inlet 323 is formed at the bottom of the fuel injector seat body 32, and an oil inlet passage 324 is formed inside it. The upper end of the oil inlet 323 is communicated with the oil inlet passage 324, and the lower end of the oil inlet 323 is communicated with the lubricating oil inlet formed in the tilting pad thrust bearing body 1. The lubricating oil injected from the lubricating oil inlet enters the oil inlet passage 324 through the oil inlet 323;

[0040] The fuel injector seat body 32 is evenly provided with a number of through fuel injection holes. The lower ends of the fuel injection holes communicate with the oil inlet passage 324. The upper ends of the fuel injection holes are fixedly connected with a nozzle 31. The lubricating oil inside the oil inlet passage 324 flows through the fuel injection holes in sequence and is sprayed onto the surface of the thrust pad 2 through the nozzle 31 to lubricate and cool it.

[0041] An oil drain groove 322 is opened at the upper end of the fuel injector seat body 2, and an oil baffle 321 is fixedly installed. The oil baffle 321 is located between the nozzle 31 and the oil drain groove 322. The oil drain groove 322 communicates with the lubricating oil outlet opened on the tilting pad thrust bearing body 1. The lubricating oil heated by the surface of the thrust pad 2 is blocked by the oil baffle 321 of the next adjacent fuel injector assembly 3, flows into the oil drain groove 322 closest to the oil baffle 321, and is then discharged through the lubricating oil outlet opened on the tilting pad thrust bearing body 1, taking away the heat generated when the tilting pad thrust bearing body 1 works, preventing the hot lubricating oil from entering the next thrust pad 2 and mixing with the cold lubricating oil sprayed by the next fuel injector assembly 3. Not only does it reduce the surface temperature of the current thrust pad 2, but also it prevents the hot lubricating oil from bringing heat to the next thrust pad 2. In short, it can effectively separate the cold oil and the hot oil, reduce the lubricating oil temperature on the surface of the thrust pad 2, effectively prevent failures due to excessive temperature inside the bearing, and improve the service life of the bearing.

[0042] Preferably, the top end of the nozzle 31 is an elbow with an angle of 45° - 80°, that is, the top end of the nozzle 31 is inclined, and the angle between the top end of the nozzle 31 and the lower end of the nozzle 31 is 45° - 80°, which is more conducive to spraying the lubricating oil onto the working surface of the thrust pad.

[0043] Preferably, the top end of the nozzle 31 is made of a thermosensitive material. The aperture of the upper end of the nozzle 31 can change with the temperature of the sprayed lubricating oil. When the temperature of the lubricating oil is too high, the aperture of the nozzle increases, and the amount of sprayed lubricating oil increases, thereby taking away more heat. When the temperature of the lubricating oil is low, the aperture of the nozzle decreases, and the amount of sprayed lubricating oil decreases, saving the usage amount of lubricating oil while ensuring the normal operation of the bearing.

[0044] Preferably, as Figure 3 and Figure 4 shown, the side of the oil baffle 321 close to the oil drain groove 322 is an inclined surface, that is, the upper end of the oil baffle 321 is triangular, which not only plays a role in guiding the hot lubricating oil but also reduces the friction between the oil baffle and the rotating shaft neck, reduces the wear of the rotating shaft, and makes the rotating shaft run more smoothly.

[0045] Preferably, as Figure 4 and Figure 5As shown, in order to save processing costs and improve processing efficiency, an oil inlet passage 324 is first drilled through one side of the fuel injector seat body 32, and then plug screws 33 are fixedly connected to both ends of the oil inlet passage 324 to prevent lubricating oil leakage.

[0046] The working principle of the present utility model is as follows:

[0047] Low-temperature lubricating oil is injected from the lubricating oil inlet. The cold lubricating oil enters the oil inlet passage 324 through the oil inlet 323, then passes through the injection holes and is sprayed from the nozzle 31 onto the surface of the thrust pad 2 for lubrication and cooling. The lubricating oil heated by the surface of the thrust pad 2 is blocked by the oil baffle 321 of the adjacent fuel injector assembly 3. The oil baffle 321 guides the hot lubricating oil into the oil drain groove 322, and then it is discharged and collected through the lubricating oil outlet opened in the tilting pad thrust bearing body 1, and reused after cooling; by continuously injecting low-temperature lubricating oil and discharging hot lubricating oil, it is beneficial to dissipate heat from the tilting pad thrust bearing and prevent damage caused by excessive temperature.

Claims

1. A tilting pad thrust bearing with an efficient cooling function, characterized in that, It includes a tilting pad thrust bearing body (1), and at least two thrust pad blocks (2) are fixedly installed inside the tilting pad thrust bearing body (1). An oil injection nozzle assembly (3) is fixedly installed between two adjacent thrust pad blocks (2). The oil injection nozzle assembly (3) includes an oil injection nozzle seat body (32) fixedly connected to two adjacent thrust pad blocks (2). An oil inlet (323) is formed at the bottom of the oil injection nozzle seat body (32), and an oil inlet passage (324) is formed inside it. The upper end of the oil inlet (323) is communicated with the oil inlet passage (324), and the lower end of the oil inlet (323) is communicated with the lubricating oil inlet formed in the tilting pad thrust bearing body (1). The oil injection nozzle seat body (32) is evenly provided with a number of through oil injection holes. The lower ends of the oil injection holes are communicated with the oil inlet passage (324), and the upper ends of the oil injection holes are fixedly connected with nozzles (31). An oil drain groove (322) is formed at the upper end of the oil injection nozzle seat body (32), and an oil baffle (321) is fixedly installed. The oil baffle (321) is located between the nozzle (31) and the oil drain groove (322). The oil drain groove (322) is communicated with the lubricating oil outlet formed in the tilting pad thrust bearing body (1).

2. The tilting pad thrust bearing with an efficient cooling function according to claim 1, characterized in that, First grooves are formed on the opposite surfaces of two adjacent thrust pad blocks (2). First bosses are provided on both sides of the middle part of the oil injection nozzle seat body (32), and the first bosses are fixedly inserted into the first grooves.

3. The tilting pad thrust bearing with an efficient cooling function according to claim 2, characterized in that, A pair of second grooves are formed in the tilting pad thrust bearing body (1). Second bosses are provided on both sides of the bottom of the oil injection nozzle seat body (32), and the second bosses are fixedly inserted into the second grooves.

4. The tilting pad thrust bearing with an efficient cooling function according to claim 2 or 3, characterized in that, A positioning pin hole (325) is formed at one end of the oil injection nozzle seat body (32) and in the tilting pad thrust bearing body (1). A positioning pin passes through the positioning pin hole (325) to fixedly connect the oil injection nozzle seat body (32) and the tilting pad thrust bearing body (1).

5. The tilting pad thrust bearing with an efficient cooling function according to claim 1, characterized in that, The top end of the nozzle (31) is a 45° - 80° elbow.

6. The tilting pad thrust bearing with an efficient cooling function according to claim 1 or 5, characterized in that, The top end of the nozzle (31) is made of a thermosensitive material.

7. The tilting pad thrust bearing with an efficient cooling function according to claim 1, characterized in that, One side of the oil baffle (321) close to the oil drain groove (322) is an inclined surface.

8. The tilting pad thrust bearing with an efficient cooling function according to claim 1, characterized in that, The oil inlet passage (324) penetrates through one side of the oil injection nozzle seat body (32), and plugging plugs (33) are fixedly connected to both ends of the oil inlet passage (324).

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