Thrust bearing and air compressor

Abstract

The utility model provides a thrust bearing and an air compressor, the thrust bearing can work in cooperation with a thrust disc, the thrust disc and a rotating shaft are integrally formed or fixedly connected, the thrust bearing comprises a top layer foil arranged on one side of the thrust disc, and an air film can be formed between the top layer foil and the thrust disc so that the rotating shaft can rotate; wherein the top-layer foil is provided with air holes, and the air holes allow part of gas forming an air film to pass through so as to cool the thrust bearing, so that the cooling efficiency of the thrust bearing is improved.

Description

Technical Field

[0001] The present application relates to the technical field of bearings, and in particular to a thrust bearing and an air compressor. Background Art

[0002] Axial thrust dynamic pressure gas bearings are bearings that use gas as a lubricating and cooling medium, and use the dynamic pressure effect of the gas to play a supporting role. Since the viscosity of the gas is less than that of the oil film, the power consumption is low and the life is longer than that of traditional oil-lubricated bearings. For some special occasions, such as oxygen-enhanced environments and fuel cells, the air supply system is required to be absolutely oil-free, so the use environment of air bearings is becoming more and more extensive. With the iteration of air compressors using air bearings, the speed is getting higher and higher, and the load-bearing capacity is getting stronger and stronger, which places higher requirements on the thermal management of air bearings. In the prior art, the cooling air flow of air bearings is limited at high speeds, and there is a risk of insufficient cooling. Utility Model Content

[0003] In view of this, the present application provides a thrust bearing, which can improve cooling efficiency. In addition, the present application also provides an air compressor including the thrust bearing.

[0004] In order to achieve the above objectives, this application provides the following technical solutions:

[0005] A thrust bearing, capable of working in cooperation with a thrust plate, wherein the thrust plate is integrally formed with a rotating shaft or is fixedly connected thereto, comprises:

[0006] A top foil is arranged toward the thrust disk, and an air film can be formed between the top foil and the thrust disk;

[0007] The top foil is provided with air holes, and the air holes allow part of the gas forming the air film to pass through so as to cool the thrust bearing.

[0008] Optionally, in the above thrust bearing, the top foil is provided with a protrusion protruding toward the thrust plate, and the protrusion is provided with the air hole.

[0009] Optionally, in the above thrust bearing, the protrusion includes a side wall and an inclined wall obliquely connected to the side wall, the inclined wall is arranged toward the thrust plate, and the air hole is located on the inclined wall.

[0010] Optionally, in the above thrust bearing, a plurality of air holes are provided.

[0011] Optionally, in the above thrust bearing, the shape of the air hole is waist-shaped, circular, square and / or special-shaped.

[0012] Optionally, in the above thrust bearing, the cross-sectional shape of the side wall is a straight line or an arc.

[0013] Optionally, the above-mentioned thrust bearing also includes a bottom support, an intermediate spring sheet and an intermediate support which are stacked in sequence with the top foil, the top foil is arranged adjacent to the intermediate support, and the bottom support, the intermediate spring sheet, the intermediate support and the top foil are all provided with mounting holes, and the mounting holes are screwed with bolts.

[0014] Optionally, in the above thrust bearing, the bottom support, the middle spring sheet, the middle support and the top foil sheet all have installation marks.

[0015] An air compressor comprises any one of the thrust bearings described above.

[0016] The present application provides a thrust bearing, which can work in conjunction with a thrust disk, the thrust disk is integrally formed or fixedly connected with the rotating shaft, the thrust bearing includes a top foil, the top foil is arranged toward the thrust disk, and an air film can be formed between the top foil and the thrust disk, when the rotating shaft rotates, the thrust disk and the air film rub to generate heat, so that the temperature of the thrust bearing increases. As the rotating shaft rotates for a longer time or the speed increases, the thrust bearing continues to heat up, thereby affecting the normal rotation of the rotating shaft. For this reason, air holes are specially opened in the top foil, so that part of the gas forming the air film can be discharged through the air holes, thereby increasing the gas flow through the bearing, thereby taking away more heat from the thrust bearing, and thus improving the cooling efficiency of the thrust bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of the structure of the top foil provided in an embodiment of the present application;

[0019] Figure 2 A schematic diagram of the structure of the intermediate support provided in the embodiment of the present application;

[0020] Figure 3 A schematic diagram of the structure of the intermediate spring sheet provided in an embodiment of the present application;

[0021] Figure 4 A schematic diagram of the structure of the bottom support provided in an embodiment of the present application;

[0022] Figure 5 A schematic diagram of the structure of a thrust bearing provided in an embodiment of the present application;

[0023] Figure 6A schematic diagram of the structure of another top foil provided in an embodiment of the present application.

[0024] exist Figure 1-Figure 6 middle:

[0025] 1. Top foil; 2. Air hole; 3. Protrusion; 4. Side wall; 5. Inclined wall; 6. Bottom support; 7. Middle spring piece; 8. Middle support; 10. Mounting hole; 11. Mounting mark; 12. Middle support leg; 13. Bottom support leg; 14. Top connecting leg; 15. Middle connecting leg; 16. Positioning hole. DETAILED DESCRIPTION

[0026] The present application provides a thrust bearing, which can improve cooling efficiency. In addition, the present application also provides an air compressor including the thrust bearing.

[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] like Figure 1-Figure 6 As shown, an embodiment of the present application provides a thrust bearing, which can work in conjunction with a thrust plate. The thrust plate is integrally formed with or fixedly connected to the rotating shaft. The thrust bearing includes a top foil 1, which is arranged toward the thrust plate, and an air film can be formed between the top foil 1 and the thrust plate. The presence of the air film can reduce the wear between the thrust bearing and the thrust plate, and when the rotating shaft rotates, the thrust plate and the air film rub against each other to generate heat, thereby increasing the temperature of the thrust bearing. It should be noted that the air film is very thin, that is, the gas flow rate of the air film is small, and the gas flow rate of the air film is slow. When the shaft runs at high speed, the friction effect between the air film and the thrust plate is stronger, resulting in an increase in the temperature of the air film. The high-temperature air film transfers heat to the thrust bearing, and the heat generation of the thrust bearing increases, thereby affecting the service life of the thrust bearing. For this reason, a pore 2 is specially opened in the top foil 1. Part of the gas constituting the air film takes away the heat generated by the operation of the thrust bearing from the bottom and surface of the top foil 1 through the pore 2. In this way, the gas flow area is increased, the gas flow rate is increased, and the safe use of the thrust bearing within the operating speed is ensured. At the same time, when the thrust bearing is fully cooled, the allowable rotation speed of the thrust bearing can continue to be increased. In this way, the dynamic flow of the gas constituting the air film is realized, thereby taking away the heat of the thrust bearing and improving the cooling efficiency of the thrust bearing.

[0029] It should be noted that the thrust bearings are distributed on both sides of the thrust plate to limit the axial movement of the thrust plate and the rotating shaft.

[0030] Further, such as Figure 1 and Figure 5 As shown, the top foil 1 is provided with a protrusion 3 protruding toward the thrust disk, and the protrusion 3 is provided with an air hole 2. The top foil 1 is provided with a protrusion 3, and the shape of the protrusion 3 is not limited to a wedge shape, a trapezoidal shape, etc., and the air hole 2 is provided on the protrusion 3. The pressure of the air film between the protrusion 3 and the thrust disk is higher than that of other parts, so that the gas can pass more quickly, thereby improving the cooling efficiency.

[0031] Furthermore, the protrusion 3 includes a side wall 4 and an inclined wall 5 obliquely connected to the side wall 4, the inclined wall 5 is arranged toward the thrust plate, and the air hole 2 is located on the inclined wall 5. It should be noted that there are multiple protrusions 3, and the multiple protrusions 3 are evenly distributed around the circumference of the top foil 1. In this embodiment, the cross-sectional shape of the protrusion 3 is preferably wedge-shaped, so it can be seen that the shape of the air film is also wedge-shaped, and the wedge-shaped air film has a higher load-bearing capacity and can support the high-speed movement of the rotating shaft.

[0032] It should be noted that if Figure 5 As shown, the thrust bearing also includes an intermediate support 8 (described below). The top foil 1 and the intermediate support 8 are stacked, and the intermediate support 8 includes an intermediate leg 12. The intermediate leg 12 is used to support the top foil 1. During the rotation of the shaft, the bearing exerts an extrusion force on the air film, and the air film transmits this extrusion force to the top foil 1. The intermediate leg 12 supports the top foil 1. The higher the protrusion position on the protrusion 3, the higher the pressure of the corresponding air film area. The pores 2 are distributed at the higher position of the protrusion 3 relative to the protrusion position, and the gas flows faster, which can improve the cooling efficiency. Figure 5 As shown, the top foil 1 is divided by the middle leg 12, the part on the right side of the middle leg 12 is the first part of the top foil 1, and the part on the left side of the middle leg 12 is the second part of the top foil 1. The air hole 2 can be the first part and / or the second part set according to needs. It should be noted that the pressure of the air film formed by the first part and the thrust disk is lower than the pressure of the air film formed by the second part and the thrust disk.

[0033] In an optional embodiment, a plurality of air holes 2 are provided. The positions of the air holes 2 are arranged according to actual needs. A plurality of air holes 2 can accelerate the flow of gas and improve the ventilation efficiency.

[0034] The shape of the pores 2 is kidney-shaped, circular, square and / or irregular. The pores 2 can be set in a variety of shapes and arranged on the inclined wall 5 according to actual needs. It should be noted that the shape of the pores 2 can be a single shape, such as all kidney-shaped, and the shape of the pores 2 can also be mixed, such as a mixture of kidney-shaped, circular and square. In this embodiment, preferably, the shape of the pores 2 is kidney-shaped, which is convenient for gas flow and easy to manufacture.

[0035] In an optional embodiment, the cross-sectional shape of the side wall 4 is a straight line or an arc. More specifically, the inclination direction of the straight line can be arbitrary, so that Figure 6 For example, the straight line is tilted to the right or to the left, and the tilt angle is arbitrary; the convex part of the arc is also set arbitrarily. Figure 6 For example, the arc bulges to the left or to the right, so that the side wall 4 can be flexibly arranged according to actual needs. It should be noted that the arc can be in a non-straight line form such as a circular arc or a spline curve.

[0036] In other optional embodiments, the cross-sectional shape of the side wall 4 can also be a combination of a straight line and an arc. In an optional embodiment, the thrust bearing also includes a bottom support 6, an intermediate spring sheet 7 and an intermediate support 8 which are sequentially stacked with the top foil 1, the top foil 1 is adjacent to the intermediate support 8, and the bottom support 6, the intermediate spring sheet 7, the intermediate support 8 and the top foil 1 are all provided with mounting holes 10, which are screwed with bolts. That is, the thrust bearing is specifically provided with a bottom support 6, an intermediate spring sheet 7, an intermediate support 8 and a top foil 1 from bottom to top, and the bottom support 6, the intermediate spring sheet 7, the intermediate support 8 and the top foil 1 are all provided with mounting holes 10, and the thrust bearing is fixedly connected by bolts extending into the mounting holes 10 and screwed with the mounting holes 10, so that the air film can better support the rotation of the shaft.

[0037] It should be noted that positioning holes 16 are provided between the mounting holes 10 of the bottom support 6 , the middle spring sheet 7 , the middle support 8 and the top foil 1 to strengthen the connection between the bottom support 6 , the middle spring sheet 7 , the middle support 8 and the top foil 1 .

[0038] Furthermore, the bottom support 6, the middle spring sheet 7, the middle support 8 and the top foil sheet 1 all have installation marks 11. In this way, the bottom support 6, the middle spring sheet 7, the middle support 8 and the top foil sheet 1 can be quickly installed, and the installation efficiency is improved. It should be noted that the installation mark 11 can be an arrow, or text, etc.

[0039] In this embodiment, if Figure 1-Figure 6As shown, the bottom support 6 is composed of an outer ring and a plurality of bottom legs 13, the outer ring is provided with a plurality of evenly distributed mounting holes 10, three positioning holes 16 are arranged in the middle of the mounting holes 10, and a rotation direction arrow (i.e., mounting mark 11) is provided; the middle spring piece 7 is composed of an outer ring, an intermediate connecting leg 15, and an annular piece, the outer ring and the annular piece are connected by the evenly distributed intermediate connecting leg 15, the outer ring is provided with a plurality of evenly distributed mounting holes 10, three positioning holes 16 are arranged in the middle of the mounting holes 10, and a rotation direction arrow is provided. The middle support 8 is similar to the bottom support 6, and is also composed of an outer ring and a plurality of middle legs 12. The outer ring is provided with a plurality of evenly distributed mounting holes 10, and three positioning holes 16 are arranged in the middle of the mounting holes 10, and a rotation direction arrow is provided. The top foil 1 is composed of an outer ring, an inner ring and a top connecting leg 14. The inner ring and the outer ring are connected by a plurality of evenly distributed top connecting legs 14. The outer ring is provided with a plurality of evenly distributed mounting holes 10, and three positioning holes 16 are arranged in the middle of the mounting holes 10, and a rotation direction arrow is provided. The inner ring is provided with a plurality of evenly distributed wedge-shaped protrusions, and air holes 2 are arranged on the wedge surface.

[0040] When the bottom support 6, the middle spring sheet 7, the middle support 8 and the top foil 1 are arranged, the outer circles of the above four layers overlap, the mounting holes 10 and the positioning holes 16 also overlap, and the rotation direction of the arrows of each layer is consistent to prevent installation errors, thereby saving installation time. The number of the middle legs 12 is the same as the number of the bottom legs 13, and after the above four layers are installed, the middle legs 12 are located between the two bottom legs 13, and the protrusions 3 of the top foil 1 are arranged one-to-one with the legs of the bottom support 6. Under the action of the raised part and the high-speed rotating thrust plate, an air film will be formed on the top foil 1. The air film will support the thrust plate away from the top foil 1, so that the rotating shaft will float. The air film will transfer the reaction force of the rotating shaft to the top foil 1. The top foil 1 will transfer the force to the middle leg 12 of the middle support 8 of the next layer. The middle spring sheet 7 is an elastic part and will be elastically deformed after being subjected to force. The middle leg 12 will be pressed on the ring of the middle spring sheet 7 after being subjected to force, and the ring will be deformed toward the middle of the two legs of the bottom support 6, thereby forming a whole force chain.

[0041] In addition, the embodiment of the present application further provides an air compressor, which includes the above thrust bearing. For the beneficial effects of the air compressor brought by the above thrust bearing, please refer to the above description of the thrust bearing, which will not be repeated here.

[0042] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0043] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0044] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0045] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0046] It should be understood that the qualifiers "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are only used to more clearly explain the technical solutions and cannot be used to limit the scope of protection of the present application.

[0047] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A thrust bearing, characterized in that: Can work with a thrust plate, the thrust plate is integrally formed with the rotating shaft or fixedly connected, including: A top foil is arranged toward the thrust disk, and an air film can be formed between the top foil and the thrust disk; The top foil is provided with air holes, and the air holes allow part of the gas forming the air film to pass through so as to cool the thrust bearing.

2. The thrust bearing according to claim 1, characterized in that: The top foil is provided with a protrusion protruding toward the thrust plate, and the protrusion is provided with the air hole.

3. The thrust bearing according to claim 2, characterized in that: The protruding portion includes a side wall and an inclined wall obliquely connected to the side wall, the inclined wall is arranged toward the thrust plate, and the air hole is located on the inclined wall.

4. The thrust bearing according to claim 2, characterized in that: The air holes are provided in plurality.

5. The thrust bearing according to claim 4, characterized in that: The air holes are in the shape of waist, circle, square and / or special shape.

6. The thrust bearing according to claim 3, characterized in that: The cross-sectional shape of the side wall is a straight line or an arc.

7. The thrust bearing according to claim 3, characterized in that: It also includes a bottom support, an intermediate spring sheet and an intermediate support which are stacked in sequence with the top foil, the top foil is arranged adjacent to the intermediate support, and mounting holes are arranged on the bottom support, the intermediate spring sheet, the intermediate support and the top foil, and the mounting holes are screwed with bolts.

8. The thrust bearing according to claim 7, characterized in that: The bottom support, the middle spring sheet, the middle support and the top foil sheet all have installation marks.

9. An air compressor, characterized in that: Comprising the thrust bearing according to any one of claims 1-8.

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