Aerodynamic bearing

Abstract

The invention discloses an air dynamic pressure bearing, and relates to the technical field of bearings, the air dynamic pressure bearing comprises a mounting seat, a bearing top foil, a bearing middle foil and a bearing bump foil, the bearing top foil, the bearing middle foil and the bearing bump foil are all arranged in the mounting seat, the bearing middle foil is sleeved on the bearing top foil, and the bearing bump foil is sleeved on the bearing middle foil. The bearing bump foil is sleeved on the bearing middle foil and corresponds to the bearing top foil, and at least one of the bearing top foil, the bearing middle foil and the bearing bump foil forms a heat dissipation flow channel. According to the air dynamic pressure bearing, the heat dissipation effect of the air dynamic pressure bearing can be improved, and the heat dissipation performance of the air dynamic pressure bearing is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of bearings, and in particular to an air dynamic pressure bearing. Background Art

[0002] In the related art, the existing air dynamic pressure bearing has poor heat dissipation performance. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide an air dynamic pressure bearing, which is conducive to improving the heat dissipation effect of the air dynamic pressure bearing and enhancing the heat dissipation performance of the air dynamic pressure bearing.

[0004] According to an embodiment of the present invention, the air dynamic pressure bearing comprises: a mounting seat, a bearing top foil, a bearing middle foil and a bearing wave foil, wherein the bearing top foil, the bearing middle foil and the bearing wave foil are all arranged in the mounting seat, the bearing middle foil is sleeved on the bearing top foil, the bearing wave foil is sleeved on the bearing middle foil and corresponds to the bearing top foil, and at least one of the bearing top foil, the bearing middle foil and the bearing wave foil is formed with a heat dissipation channel.

[0005] According to the air dynamic pressure bearing of the embodiment of the present application, the cooling gas can flow in the air dynamic pressure bearing through the heat dissipation channels on the bearing top foil, the bearing middle foil and the bearing wave foil. The cooling gas can flow through the bearing top foil, the bearing middle foil and the bearing wave foil. The cooling gas can exchange heat with the bearing top foil, the bearing middle foil and the bearing wave foil, thereby cooling the bearing top foil, the bearing middle foil and the bearing wave foil, which is beneficial to improving the heat dissipation effect of the air dynamic pressure bearing and enhancing the heat dissipation performance of the air dynamic pressure bearing.

[0006] According to some embodiments of the present invention, a first through hole is formed on the bearing top foil, and the first through hole penetrates the bearing top foil along the thickness direction of the bearing top foil, and the first through hole is configured as the heat dissipation channel.

[0007] According to some embodiments of the present invention, there are multiple first through holes, and the multiple first through holes form at least one first through hole column, each first through hole column includes multiple first through holes, and the multiple first through holes in each first through hole column are arranged along the axial direction of the bearing top foil.

[0008] According to some embodiments of the present invention, a plurality of the first through holes form a plurality of first through hole rows, and the plurality of first through hole rows are arranged along the circumferential direction of the bearing top foil.

[0009] According to some embodiments of the present invention, the bearing foil is formed with a second through hole, the second through hole penetrates the bearing foil along the thickness direction of the bearing foil, and the second through hole is configured as the heat dissipation channel.

[0010] According to some embodiments of the present invention, there are multiple second through holes, and the multiple second through holes form at least one second through hole column, each second through hole column includes multiple second through holes, and the multiple second through holes in each second through hole column are arranged along the axial direction of the foil in the bearing.

[0011] According to some embodiments of the present invention, a plurality of the second through holes form a plurality of rows of the second through holes, and the plurality of rows of the second through holes are arranged along the circumferential direction of the foil in the bearing.

[0012] According to some embodiments of the present invention, the bearing foil is formed with a third through hole, the third through hole penetrates the bearing foil along the thickness direction of the bearing foil, and the third through hole is configured as the heat dissipation channel.

[0013] According to some embodiments of the present invention, the third through hole extends along the circumference of the bearing foil.

[0014] According to some embodiments of the present invention, there are a plurality of the third through holes, and the plurality of the third through holes are arranged along the axial direction of the bearing foil.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 is a schematic diagram of an air dynamic pressure bearing according to an embodiment of the present application;

[0018] Figure 2 is a schematic diagram of a bearing top foil according to an embodiment of the present application;

[0019] Figure 3 is a schematic diagram of a foil in a bearing according to an embodiment of the present application;

[0020] Figure 4 It is a partial structural schematic diagram of a bearing corrugated foil according to an embodiment of the present application.

[0021] Reference numerals:

[0022] Air dynamic bearing 1,

[0023] Mounting seat 10,

[0024] The bearing top foil 20, the first through hole 21, the first flange 22, the first plate body 221, the second plate body 222,

[0025] The bearing foil 30, the second through hole 31, the second flange 32, the third plate 321, the fourth plate 322,

[0026] Bearing foil 40 , third through hole 41 , third flange 42 , fifth plate 421 . DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] Reference below Figure 1-Figure 4 An air dynamic pressure bearing 1 according to an embodiment of the present invention is described.

[0029] According to the air dynamic pressure bearing 1 of the embodiment of the present invention, Figure 1-Figure 4 As shown, the air dynamic pressure bearing 1 may include: a mounting seat 10, a bearing top foil 20, a bearing middle foil 30 and a bearing wave foil 40, the bearing top foil 20, the bearing middle foil 30 and the bearing wave foil 40 are all arranged in the mounting seat 10, the bearing middle foil 30 is sleeved on the bearing top foil 20, the bearing wave foil 40 is sleeved on the bearing middle foil 30 and corresponds to the bearing top foil 20, and at least one of the bearing top foil 20, the bearing middle foil 30 and the bearing wave foil 40 is formed with a heat dissipation channel.

[0030] It should be noted that in the related art, the existing air dynamic pressure bearings have poor heat dissipation.

[0031] Based on this, the embodiment of the present application proposes an air dynamic pressure bearing 1, wherein the mounting seat 10, the bearing top foil 20, the bearing middle foil 30 and the bearing bump foil 40 can all be made of metal materials. The mounting seat 10 can be constructed as a cylindrical structure with an annular cross section, the bearing top foil 20, the bearing middle foil 30 and the bearing bump foil 40 can all be arranged in the mounting seat 10, and the bearing top foil 20, the bearing middle foil 30 and the bearing bump foil 40 can all be fixedly connected to the mounting seat 10 by means of a snap connection. The bearing top foil 20, the bearing middle foil 30 and the bearing bump foil 40 can all be constructed as an annular structure, and the bearing top foil 20, the bearing middle foil 30 and the bearing bump foil 40 are arranged in sequence along the radial direction of the mounting seat 10, and the bearing top foil 20, the bearing middle foil 30, the bearing bump foil 40 and the mounting seat 10 are stacked. The bearing middle foil 30 is sleeved on the bearing top foil 20, and the bearing bump foil 40 is sleeved on the bearing middle foil 30. The bearing bump foil 40 is arranged corresponding to the bearing top foil 20 along the radial direction of the mounting seat 10. The bearing bump foil 40 and the bearing top foil 20 can be arranged on both sides of the bearing middle foil 30 along the radial direction of the mounting seat 10. Along the axial direction of the mounting seat 10, the lengths of the bearing top foil 20, the bearing middle foil 30, and the bearing bump foil 40 can be equal, and the two ends of the bearing top foil 20, the bearing middle foil 30, and the bearing bump foil 40 along the axial direction of the mounting seat 10 can be aligned.

[0032] At least one of the bearing top foil 20, the bearing middle foil 30 and the bearing wave foil 40 is formed with a heat dissipation channel, the bearing top foil 20 can be formed with a heat dissipation channel, the bearing middle foil 30 can be formed with a heat dissipation channel, the bearing wave foil 40 can be formed with a heat dissipation channel, or any two of the bearing top foil 20, the bearing middle foil 30 and the bearing wave foil 40 can be formed with a heat dissipation channel, or the bearing top foil 20, the bearing middle foil 30 and the bearing wave foil 40 can all be formed with a heat dissipation channel. The embodiment of the present application is described by taking the bearing top foil 20, the bearing middle foil 30 and the bearing wave foil 40 as an example in which the heat dissipation channel is formed. The cooling gas can enter the air dynamic pressure bearing 1 through the gap between the bearing foil 40 and the mounting seat 10, and the cooling gas can flow in the air dynamic pressure bearing 1 through the heat dissipation flow channels on the bearing top foil 20, the bearing middle foil 30 and the bearing foil 40. The cooling gas can flow through the bearing top foil 20, the bearing middle foil 30 and the bearing foil 40, and the cooling gas can exchange heat with the bearing top foil 20, the bearing middle foil 30 and the bearing foil 40, thereby cooling the bearing top foil 20, the bearing middle foil 30 and the bearing foil 40, which is beneficial to improving the heat dissipation effect of the air dynamic pressure bearing 1 and enhancing the heat dissipation performance of the air dynamic pressure bearing 1.

[0033] The air dynamic pressure bearing 1 can be assembled with the shaft. As an example, when the air dynamic pressure bearing 1 is used to be assembled with the first shaft body, the air dynamic pressure bearing 1 can be sleeved on the first shaft body, the inner wall of the bearing top foil 20 can abut against the outer peripheral wall of the first shaft body, and an air film can be formed between the bearing top foil 20 and the first shaft body. When the first shaft body rotates relative to the air dynamic pressure bearing 1, the first shaft body generates radial force on the air dynamic pressure bearing 1. The bearing corrugated foil 40 has multiple corrugated structures, which can provide elastic support for the first shaft body, can play a role in vibration reduction, and is conducive to improving the stability of the rotation of the first shaft body.

[0034] In some embodiments of the present invention, the bearing top foil 20 may be formed with a first flange 22, the bearing middle foil 30 may be formed with a second flange 32, and the bearing bump foil 40 may be formed with a third flange 42. When the bearing middle foil 30 is sleeved on the bearing top foil 20, the bearing bump foil 40 is sleeved on the bearing middle foil 30, and the bearing bump foil 40 and the bearing top foil 20 are arranged on both sides of the bearing middle foil 30 along the radial direction of the mounting seat 10, the second flange 32 may be clamped between the first flange 22 and the third flange 42, and a mounting groove is formed on the mounting seat 10, and the first flange 22, the second flange 32 and the third flange 42 may be assembled together in the mounting groove.

[0035] The first flange 22 may include a first plate 221 and a second plate 222, the first plate 221 may extend along the radial direction of the bearing top foil 20, and an angle may be formed between the first plate 221 and the second plate 222, which may be a right angle or similar to a right angle. The second flange 32 may include a third plate 321 and a fourth plate 322, the third plate 321 may extend along the radial direction of the bearing middle foil 30, and an angle may be formed between the third plate 321 and the fourth plate 322, which may be a right angle or similar to a right angle. The third flange 42 includes a fifth plate 421, and the fifth plate 421 may extend along the radial direction of the bearing wave foil 40. The mounting groove may include a first groove body and a second groove body, both of which may extend along the axial direction of the mounting seat 10 to the two ends of the mounting seat 10, the first groove body is recessed toward the mounting seat 10 along the radial direction of the mounting seat 10, the second groove body may be located in the mounting seat 10, and an angle may be formed between the second groove body and the first groove body, which may be a right angle or similar to a right angle. When the bearing top foil 20, the bearing middle foil 30, and the bearing wave foil 40 are all installed on the mounting seat 10, and the first flange 22, the second flange 32, and the third flange 42 are installed in the mounting groove, the first plate body 221, the third plate body 321, and the fifth plate body 421 are located in the first groove body, and the second plate body 222 and the fourth plate body 322 are located in the second groove body, thereby achieving the effect that the bearing top foil 20, the bearing middle foil 30, and the bearing wave foil 40 are all arranged in the mounting seat 10.

[0036] In some embodiments of the present invention, the bearing top foil 20 is formed with a first through hole 21 , which penetrates the bearing top foil 20 along the thickness direction of the bearing top foil 20 , and the first through hole 21 is configured as a heat dissipation channel.

[0037] The bearing top foil 20 is formed with a first through hole 21, which can be configured as a long strip hole. The first through hole 21 can extend along the circumference of the bearing top foil 20, so as to increase the flow of cooling gas passing through the first through hole 21, which is beneficial to enhance the cooling effect on the bearing top foil 20. The first through hole 21 can penetrate the bearing top foil 20 along the thickness direction of the bearing top foil 20, and the first through hole 21 can be configured as a heat dissipation channel. The cooling gas can flow from the side of the bearing top foil 20 facing the bearing middle foil 30 to the inner side of the bearing top foil 20 through the first through hole 21, and the cooling gas can flow through the bearing top foil 20, and the cooling gas exchanges heat with the bearing top foil 20, thereby cooling the bearing top foil 20.

[0038] In some embodiments of the present invention, there are multiple first through holes 21, and the multiple first through holes 21 form at least one first through hole column, each first through hole column includes multiple first through holes 21, and the multiple first through holes 21 in each first through hole column are arranged along the axial direction of the bearing top foil 20.

[0039] There may be a plurality of first through holes 21, and the plurality of first through holes 21 may form at least one first through hole row, thereby increasing the contact area between the cooling gas and the bearing top foil 20. Each first through hole row may include a plurality of first through holes 21, and the plurality of first through holes 21 are arranged along the axial direction of the bearing top foil 20, which may increase the flow rate of the cooling gas flowing through the bearing top foil 20, and may enable the cooling gas to flow into the inner side of the bearing top foil 20 from a plurality of positions along the axial direction of the bearing top foil 20, and may increase the heat exchange area between the cooling gas and the bearing top foil 20, thereby improving the heat exchange efficiency between the cooling gas and the bearing top foil 20, which is beneficial to improving the efficiency of cooling the bearing top foil 20 and improving the heat dissipation effect of the bearing top foil 20.

[0040] In some embodiments of the present invention, the plurality of first through holes 21 form a plurality of first through hole rows, and the plurality of first through hole rows are arranged along the circumferential direction of the bearing top foil 20 .

[0041] There may be a plurality of first through hole rows, and a plurality of first through holes 21 may form a plurality of first through hole rows. The first through hole rows may be one row, two rows, three rows, etc. The number of first through hole rows may be set according to the strength requirement of the bearing top foil 20, thereby improving the heat dissipation performance of the bearing top foil 20 while meeting the strength requirement of the bearing top foil 20. The plurality of first through hole rows are arranged along the circumference of the bearing top foil 20, so that the cooling gas can flow into the inner side of the bearing top foil 20 from different positions along the circumference of the bearing top foil 20, thereby realizing comprehensive cooling of the bearing top foil 20 along the circumference of the bearing top foil 20, which is beneficial to improving the heat exchange efficiency between the cooling gas and the bearing top foil 20, and improving the heat dissipation effect of the bearing top foil 20.

[0042] The embodiment of the present application is described by taking the first through hole rows as two rows as an example, and the cooling gas can flow through the bearing top foil 20 through the two first through hole rows. When the air dynamic pressure bearing 1 is assembled with the shaft, an air film is formed between the bearing top foil 20 and the shaft, and the remaining structure of the bearing top foil 20 can be used to support the air film, which is beneficial to improve the stability of the air film. The two first through hole rows can be symmetrically arranged with the central axis of the bearing top foil 20 as the symmetry center, so that the bearing top foil 20 can be evenly stressed, which is beneficial to maintain the balance of the bearing top foil 20 and improve the bearing capacity of the bearing top foil 20.

[0043] In some embodiments of the present invention, the bearing foil 30 is formed with a second through hole 31 , which penetrates the bearing foil 30 along the thickness direction of the bearing foil 30 , and the second through hole 31 is configured as a heat dissipation channel.

[0044] The bearing foil 30 is formed with a second through hole 31, which can be configured as a long strip hole. The second through hole 31 can extend along the circumference of the bearing foil 30, so that the flow of cooling gas passing through the second through hole 31 can be increased, which is conducive to enhancing the cooling effect on the bearing foil 30. The second through hole 31 can penetrate the bearing foil 30 along the thickness direction of the bearing foil 30. The second through hole 31 can be configured as a heat dissipation channel. The cooling gas can flow from the side of the bearing foil 30 facing the bearing wave foil 40 to the side of the bearing foil 30 facing the bearing top foil 20 through the second through hole 31. The cooling gas can flow through the bearing foil 30, and the cooling gas can exchange heat with the bearing foil 30, thereby cooling the bearing foil 30.

[0045] In some embodiments of the present invention, there are multiple second through holes 31, and the multiple second through holes 31 form at least one second through hole column, each second through hole column includes multiple second through holes 31, and the multiple second through holes 31 in each second through hole column are arranged along the axial direction of the foil 30 in the bearing.

[0046] There may be a plurality of second through holes 31, and the plurality of second through holes 31 may form at least one second through hole row, thereby increasing the contact area between the cooling gas and the bearing foil 30. Each second through hole row may include a plurality of second through holes 31, and the plurality of second through holes 31 are arranged along the axial direction of the bearing foil 30, which may increase the flow rate of the cooling gas flowing through the bearing foil 30, and may enable the cooling gas to flow from the bearing foil 30 along a plurality of positions in the axial direction of the bearing foil 30 to the side of the bearing foil 30 facing the bearing top foil 20, thereby increasing the heat exchange area between the cooling gas and the bearing foil 30, thereby improving the heat exchange efficiency between the cooling gas and the bearing foil 30, which is beneficial to improving the efficiency of cooling the bearing foil 30 and improving the heat dissipation effect of the bearing foil 30.

[0047] In some embodiments of the present invention, the plurality of second through holes 31 form a plurality of second through hole rows, and the plurality of second through hole rows are arranged along the circumferential direction of the foil 30 in the bearing.

[0048] There may be multiple second through hole rows, and multiple second through holes 31 may form multiple second through hole rows. The number of second through hole rows may be one row, two rows, three rows, etc. The number of second through hole rows may be set according to the strength requirements of the bearing foil 30, thereby improving the heat dissipation performance of the bearing foil 30 while meeting the strength requirements of the bearing foil 30. Multiple second through hole rows may be arranged along the circumference of the bearing foil 30, so that the cooling gas may flow from different positions of the bearing foil 30 along the circumference of the bearing foil 30 to the side of the bearing foil 30 facing the bearing top foil 20, thereby achieving comprehensive cooling of the bearing foil 30 along the circumference of the bearing foil 30, which is beneficial to improving the heat exchange efficiency between the cooling gas and the bearing foil 30, and improving the heat dissipation effect of the bearing foil 30.

[0049] As an example, the number of second through hole columns can be the same as the number of first through hole columns, multiple second through hole columns can be arranged corresponding to multiple first through hole columns along the radial direction of the mounting seat 10, each first through hole column has a second through hole column arranged corresponding thereto, the number of second through holes 31 in each second through hole column can be the same as the number of first through holes 21 in each first through hole column, and the multiple second through holes 31 in each second through hole column can be arranged one-to-one with the multiple first through holes 21 in each first through hole column, thereby realizing the corresponding connection between the first through hole column and the second through hole column, so that the cooling gas can flow between the bearing middle foil 30 and the bearing top foil 20.

[0050] The embodiment of the present application is described by taking the case where there are two second through hole columns and the two second through hole columns are arranged in a one-to-one correspondence with the two first through hole columns. The two second through hole columns are arranged in a one-to-one correspondence with the two first through hole columns, and each second through hole column is connected to the corresponding first through hole column, so that the cooling gas can flow in the air dynamic pressure bearing 1, reduce the probability of cooling gas blocking in the air dynamic pressure bearing 1, and achieve continuous cooling of the air dynamic pressure bearing 1.

[0051] In some embodiments of the present invention, the bearing foil 40 is formed with a third through hole 41 , which penetrates the bearing foil 40 along the thickness direction of the bearing foil 40 , and the third through hole 41 is configured as a heat dissipation channel.

[0052] The bearing foil 40 is formed with a third through hole 41, which can be configured as a long strip hole, so that the flow of cooling gas passing through the third through hole 41 can be increased, which is conducive to enhancing the cooling effect on the bearing foil 40. The third through hole 41 can penetrate the bearing foil 40 along the thickness direction of the bearing foil 40, and the third through hole 41 can be configured as a heat dissipation channel. The cooling gas can flow from the side of the bearing foil 40 facing the mounting seat 10 to the side of the bearing foil 40 facing the bearing through the third through hole 41. The cooling gas can flow through the bearing foil 40, and the cooling gas can exchange heat with the bearing foil 40, thereby cooling the bearing foil 40.

[0053] In some embodiments of the present invention, the third through hole 41 extends along the circumference of the bearing foil 40 .

[0054] The third through hole 41 may extend along the circumference of the bearing foil 40. Along the circumference of the bearing foil 40, one end of the third through hole 41 may be arranged close to the third flange 42, and the other end of the third through hole 41 may be arranged close to the other end of the bearing foil 40 away from the third flange 42. The circumferential size of the third through hole 41 is smaller than the circumferential size of the bearing foil 40. The third through hole 41 may be connected to a plurality of second through holes 31 arranged along the bearing foil 30, and the cooling gas may flow to the bearing foil 30 along the circumference of the bearing foil 40 at the same time, which is conducive to improving the cooling efficiency of the cooling gas on the air dynamic pressure bearing 1 and improving the heat dissipation performance of the air dynamic pressure bearing 1. When the bearing foil 40 and the bearing foil 30 are stacked, the cooling air may flow to the surface of the bearing foil 30 along the circumferential direction of the bearing foil 40 through the third through hole 41, which is conducive to increasing the heat exchange area between the cooling gas and the bearing foil 30 and improving the cooling efficiency of the bearing foil 30.

[0055] In some embodiments of the present invention, there are a plurality of third through holes 41 , and the plurality of third through holes 41 are arranged along the axial direction of the bearing foil 40 .

[0056] There may be a plurality of third through holes 41. By providing a plurality of third through holes 41, the contact area between the cooling gas and the bearing foil 40 can be increased, which is beneficial to improving the efficiency of the cooling gas cooling the bearing foil 40. The plurality of third through holes 41 can be arranged along the axial direction of the bearing foil 40, and the plurality of third through holes 41 can be arranged evenly. When the bearing foil 40 and the bearing foil 30 are stacked, the plurality of third through holes 41 can be connected to the plurality of second through hole columns arranged along the bearing foil 30, thereby increasing the rate at which the cooling gas flows to the bearing foil 30, increasing the cooling efficiency of the cooling gas on the air dynamic pressure bearing 1, and improving the heat dissipation performance of the air dynamic pressure bearing 1.

[0057] Other structures and operations of the air dynamic pressure bearing 1 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0059] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An air dynamic pressure bearing, characterized in that: include: Mounting seat (10); A bearing top foil (20), a bearing middle foil (30) and a bearing bump foil (40), wherein the bearing top foil (20), the bearing middle foil (30) and the bearing bump foil (40) are all arranged in the mounting seat (10), the bearing middle foil (30) is sleeved on the bearing top foil (20), the bearing bump foil (40) is sleeved on the bearing middle foil (30) and corresponds to the bearing top foil (20), and at least one of the bearing top foil (20), the bearing middle foil (30) and the bearing bump foil (40) forms a heat dissipation channel.

2. The air dynamic bearing according to claim 1, characterized in that: The bearing top foil (20) is formed with a first through hole (21), the first through hole (21) penetrates the bearing top foil (20) along the thickness direction of the bearing top foil (20), and the first through hole (21) is configured as the heat dissipation channel.

3. The air dynamic pressure bearing according to claim 2, characterized in that: There are a plurality of first through holes (21), the plurality of first through holes (21) forming at least one first through hole column, each first through hole column comprising a plurality of first through holes (21), and the plurality of first through holes (21) in each first through hole column are arranged along the axial direction of the bearing top foil (20).

4. The air dynamic pressure bearing according to claim 3, characterized in that: The plurality of first through holes (21) form a plurality of first through hole rows, and the plurality of first through hole rows are arranged along the circumferential direction of the bearing top foil (20).

5. The air dynamic pressure bearing according to claim 1, characterized in that: The bearing foil (30) is formed with a second through hole (31), the second through hole (31) penetrates the bearing foil (30) along the thickness direction of the bearing foil (30), and the second through hole (31) is configured as the heat dissipation channel.

6. The air dynamic pressure bearing according to claim 5, characterized in that: There are a plurality of second through holes (31), and the plurality of second through holes (31) form at least one second through hole column, each second through hole column comprises a plurality of second through holes (31), and the plurality of second through holes (31) in each second through hole column are arranged along the axial direction of the foil (30) in the bearing.

7. The air dynamic bearing according to claim 6, characterized in that: A plurality of the second through holes (31) form a plurality of second through hole rows, and the plurality of second through hole rows are arranged along the circumferential direction of the foil (30) in the bearing.

8. The air dynamic bearing according to claim 1, characterized in that: The bearing foil (40) is formed with a third through hole (41), the third through hole (41) penetrates the bearing foil (40) along the thickness direction of the bearing foil (40), and the third through hole (41) is configured as the heat dissipation channel.

9. The air dynamic bearing according to claim 8, characterized in that: The third through hole (41) extends along the circumferential direction of the bearing foil (40).

10. The air dynamic bearing according to claim 8, characterized in that: There are a plurality of third through holes (41), and the plurality of third through holes (41) are arranged along the axial direction of the bearing foil (40).

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