Air bearing and motor

Abstract

The invention provides an air bearing and a motor, the air bearing comprises a bump foil, a top foil and a bearing seat, the bump foil comprises a bearing surface and a windowing structure, the windowing structure comprises a cantilever structure arranged on the bearing surface, and the cantilever structure comprises a first cantilever and a second cantilever which are arranged at an interval along the circumferential direction of the bump foil; one end of the first cantilever is connected to the bearing surface, the other end of the first cantilever extends towards a first circumferential direction to form a first free end, one end of the second cantilever is connected to the bearing surface, the other end of the second cantilever extends towards a second circumferential direction to form a second free end, and the first circumferential direction is opposite to the second circumferential direction; and the first cantilever and the second cantilever can be respectively connected with the bearing seat or the top foil so as to provide an elastic supporting effect in two different directions along the circumferential direction. According to the air bearing, supporting can be formed in the two circumferential directions, so that the rotating direction of the bearing during working is not limited, the supporting rigidity of the bearing is more flexible, and the problem that the air bearing can only rotate in the fixed rotating direction during working is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of air bearings, and more particularly to an air bearing and a motor. Background Art

[0002] The compliant foil gas bearing is a self-acting compliant gas journal bearing, which consists of a bearing housing, compliant support foils, and a top foil, etc. In the compliant foil gas bearing, the foil is the main support structure, responsible for providing the stiffness and damping required for the bearing operation, enabling the bearing to have load-carrying capacity and anti-shock and vibration resistance.

[0003] Traditional foil gas bearings are divided into two categories: multi-leaf type and arch foil type. The multi-leaf type is composed of multiple top foils overlapping each other, and the arch foil type is composed of a top foil and an arch foil located below the top foil. Both the multi-leaf type and the arch foil type have fixed ends and free ends. The rotation direction during the bearing operation will be fixed or restricted, and it cannot operate in both forward and reverse directions. Moreover, the support stiffness of these two types of bearings cannot be flexibly changed according to the actual usage scenario, which has limitations.

[0004] Due to the technical problems that the rotation direction of the air bearing in the prior art will be fixed or restricted during operation, such as it can only rotate in a fixed rotation direction and cannot operate in reverse, the present invention researches and designs an air bearing and a motor. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects that the rotation direction of the air bearing in the prior art will be fixed or restricted during operation, such as it can only rotate in a fixed rotation direction and cannot operate in reverse, so as to provide an air bearing and a motor.

[0006] To solve the above problems, the present invention provides an air bearing, which includes:

[0007] A corrugated foil, a top foil, and a bearing housing. The corrugated foil includes a bearing surface and a window structure. The window structure includes a cantilever structure provided on the bearing surface. The cantilever structure includes a first cantilever and a second cantilever spaced apart along the circumferential direction of the corrugated foil. One end of the first cantilever is connected to the bearing surface, and the other end extends towards the first circumferential direction to form a first free end. One end of the second cantilever is connected to the bearing surface, and the other end extends towards the second circumferential direction to form a second free end. The first circumferential direction is opposite to the second circumferential direction. The first cantilever and the second cantilever can respectively contact the bearing housing or the top foil to provide elastic support in two different circumferential directions.

[0008] In some embodiments,

[0009] The first free end of the first cantilever protrudes in the direction towards the second cantilever, and the second free end of the second cantilever protrudes in the direction towards the first cantilever, such that the first free end and the second free end are arranged opposite to each other, and a preset distance greater than 0 is provided between the first free end and the second free end.

[0010] In some embodiments,

[0011] The two relatively and spaced first cantilever and the second cantilever are a cantilever structure formed simultaneously by stamping on the bearing surface and disconnecting the bearing surface.

[0012] In some embodiments,

[0013] Before stamping, a groove structure is cut out on the bearing surface, the groove structure penetrates the upper and lower bottom surfaces of the bearing surface, and then the groove structure is stamped to form the first cantilever and the second cantilever.

[0014] In some embodiments,

[0015] There are multiple window structures, and the multiple window structures are spaced along the circumferential direction of the bearing surface; the first cantilever and the second cantilever of each window structure are formed by independent stamping.

[0016] In some embodiments,

[0017] The bearing seat is located on the outer periphery of the wave foil, and a circumferential limiting groove is provided on the inner peripheral wall of the bearing seat. The circumferential limiting groove is a recessed groove formed from the inner peripheral wall of the bearing seat towards the radially outer periphery. The cantilever structure is located on the outer periphery of the bearing surface and protrudes outward. The cantilever structure of the window structure can be inserted into the circumferential limiting groove and contact the groove wall of the circumferential limiting groove to form an elastic support.

[0018] In some embodiments,

[0019] There are multiple window structures, and the multiple window structures are spaced along the circumferential direction of the bearing surface; there are also multiple circumferential limiting grooves, and the multiple circumferential limiting grooves are spaced along the circumferential direction on the inner peripheral wall of the bearing seat, and the window structures and the circumferential limiting grooves are arranged in one-to-one correspondence.

[0020] In some embodiments,

[0021] In the unfolded plane of the bearing surface, the window structure is in an "I" shape. There are multiple window structures, and the multiple window structures are arranged in a multi-row and multi-column structure on the bearing surface. The circumferential direction of the wave foil is the extending direction of the rows, and the axial direction of the wave foil is the extending direction of the columns;

[0022] In the multi-row and multi-column window structures, two adjacent columns of the window structures are arranged oppositely along the circumferential direction of the corrugated foil; or in the multi-row and multi-column window structures, two adjacent columns of the window structures are not arranged oppositely along the circumferential direction of the corrugated foil, and multiple columns of the window structures are arranged alternately along the circumferential direction.

[0023] In some embodiments,

[0024] A foil fixing groove is further provided on the inner peripheral wall of the bearing housing. One circumferential end of the corrugated foil is formed as a fixed end or both circumferential ends are formed as fixed ends. The fixed end protrudes in the direction of the radial outside, and the fixed end is inserted into the foil fixing groove to fix the corrugated foil.

[0025] The present invention further provides a motor, which includes the aforementioned air bearing.

[0026] The air bearing and the motor provided by the present invention have the following beneficial effects:

[0027] 1. By setting the window structure of the air bearing to a structure form including a first cantilever and a second cantilever, and the first cantilever and the second cantilever are arranged at intervals in the circumferential direction, and the extending directions of the free ends of the two cantilevers are opposite, the present invention can form independent supports through two opposite and independent cantilevers. Compared with the existing wavy corrugated foil or the corrugated foil with a single support direction, the present invention can form supports in both circumferential directions, so that the rotation direction during the operation of the bearing is not restricted, and it can rotate either left-handed or right-handed, making the support stiffness of the bearing more flexible, solving the problem that the rotation direction of the air bearing in the prior art is fixed or restricted during operation, and it can only rotate along a fixed rotation direction and cannot operate in the reverse direction. Moreover, the present invention also reduces the interference of the middle wave arch by the wave arches on both sides, making the stiffness support more flexible.

[0028] 2. The present invention also has multiple window structures, and the multiple window structures are arranged at intervals along the circumferential direction of the bearing surface; the first cantilever and the second cantilever of each window structure are both formed by independent stamping, which can avoid the situation of unstable forming during the stamping of the continuous support structure and solve the problem of unstable forming of the continuous support structure during stamping.

[0029] 3. The present invention also has a circumferential limiting groove provided on the inner peripheral wall of the bearing housing. The circumferential limiting groove is a recessed groove formed in the direction from the inner peripheral wall of the bearing housing towards the radial outer periphery. The cantilever structure is located on the outer periphery of the bearing surface and protrudes outward, enabling the cantilever structure of the windowing structure to be inserted into the circumferential limiting groove and contact the groove wall of the circumferential limiting groove to form an elastic support. Further, it can reduce the interference between each support unit and adjacent support units, and further improve the flexibility of the bearing support performance design. Description of the Drawings

[0030] Figure 1 is the front structural view of the air bearing of the present invention after being assembled;

[0031] Figure 1a is Figure 1 the partial enlarged structural view of part A of

[0032] Figure 2 is the front structural view of the windowed support foil of the air bearing of the present invention;

[0033] Figure 3 is the front structural schematic view of the bearing housing of the air bearing of the present invention;

[0034] Figure 4 is the front expanded structural view of the first regularly arranged windowed support foil of the present invention;

[0035] Figure 5 is the front expanded structural view of the second regularly arranged windowed support foil of the present invention;

[0036] Figure 6 is the side expanded structural view of the regularly arranged windowed support foil of the present invention;

[0037] Figure 7 is the side expanded structural view of the bearing housing of the air bearing of the present invention.

[0038] The reference numerals are shown as:

[0039] 1, wave foil; 101, windowing structure; 102, bearing surface; 103, fixed end; 2, bearing housing; 201, circumferential limiting groove; 202, foil fixing groove; 3, top foil; 4, first cantilever; 5, second cantilever. Detailed Embodiments

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually illustrative only and in no way limits the present invention or its application or use. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0041] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0042] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the authorized specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, further discussion thereof is not required in subsequent drawings.

[0043] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" is usually based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the scope of protection of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0044] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. can be used here to describe the spatial positional relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is inverted, the device described as "above" or "over" other devices or structures will then be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations are made for the spatial relative descriptions used here.

[0045] In addition, it should be noted that the use of terms such as "first", "second" etc. to define components is only for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, and thus should not be construed as limiting the protection scope of the present invention.

[0046] As Figures 1-7 shown, the present invention provides an air bearing (specifically a window structure foil air bearing), which comprises:

[0047] A corrugated foil 1, a top foil 3 and a bearing housing 2. The corrugated foil 1 includes a load-bearing surface 102 and a window structure 101. The window structure 101 includes a cantilever structure provided on the load-bearing surface 102. The cantilever structure includes a first cantilever 4 and a second cantilever 5 spaced apart circumferentially along the corrugated foil 1. One end of the first cantilever 4 is connected to the load-bearing surface 102, and the other end extends towards the first circumferential direction to form a first free end. One end of the second cantilever 5 is connected to the load-bearing surface 102, and the other end extends towards the second circumferential direction to form a second free end. The first circumferential direction is opposite to the second circumferential direction. The first cantilever 4 and the second cantilever 5 can respectively contact the bearing housing 2 or the top foil 3 to provide elastic support in two different circumferential directions.

[0048] By setting the window structure of the air bearing to a structure including a first and a second cantilever, and arranging the first cantilever and the second cantilever at intervals in the circumferential direction, with the extending directions of the free ends of the two cantilevers being opposite, independent supports can be formed by the two opposite and independent cantilevers. Compared with the existing wavy foil or foil with a single support direction, the present invention can form supports in two circumferential directions, so that the rotation direction during the operation of the bearing is not restricted, and it can rotate either left or right, making the support stiffness of the bearing more flexible, solving the problem in the prior art that the rotation direction of the air bearing during operation is fixed or restricted, and it can only rotate along a fixed rotation direction and cannot operate in the reverse direction. Moreover, the present invention also reduces the interference of the middle wave arch by the wave arches on both sides, making the stiffness support more flexible.

[0049] A windowed foil air bearing provided by the present invention is composed of three major structures: a support foil (foil 1); a bearing housing 2; and a top foil (top foil 3) ( Figure 1 as shown).

[0050] The present invention provides a windowed foil air bearing that uses a windowed curved elastic support foil structure in combination with a special bearing housing to replace the traditional arched foil or cantilever foil to play an elastic support role. Compared with the traditional stamping-molded arched foil or cantilever foil, the windowed foil has significant effects in terms of improving the design freedom, stiffness adjustability, and process simplification.

[0051] In some embodiments,

[0052] The first free end of the first cantilever 4 extends in the direction towards the second cantilever 5, and the second free end of the second cantilever 5 extends in the direction towards the first cantilever 4, so that the first free end and the second free end are oppositely arranged, and the distance between the first free end and the second free end is greater than a preset distance of 0.

[0053] This is a further preferred structural form of the first and second cantilevers of the present invention, that is, the first cantilever and the second cantilever extend in opposite directions, respectively forming a first and a second free end. The first free end and the second free end are oppositely arranged and the distance between them is greater than a preset distance of 0, so that the two independent cantilevers can form supporting effects on the top foil, the bearing housing, and the rotor in the top foil in two different circumferential directions, further ensuring that the rotation direction during the operation of the bearing is not restricted, making the support stiffness of the bearing more flexible, and further improving the support flexibility of the bearing stiffness.

[0054] In some embodiments,

[0055] The two relatively and spaced-apart first cantilevers 4 and second cantilevers 5 are cantilever structures formed simultaneously by stamping on the bearing surface 102 and disconnecting the bearing surface 102 by stamping.

[0056] This is a further preferred structural form of the first and second cantilevers of the present invention. By stamping two relatively independent cantilever structures, independent supports are formed. Compared with the existing wavy structure, the present invention reduces the interference of the middle wave arch by the wave arches on both sides, and has higher flexibility in stiffness support.

[0057] In some embodiments,

[0058] Before stamping, a groove structure is cut on the bearing surface 102. The groove structure penetrates the upper and lower bottom surfaces of the bearing surface 102, and then the groove structure is stamped to form the first cantilever 4 and the second cantilever 5.

[0059] This is the specific processing step before stamping of the present invention. By cutting a groove structure on the bearing surface (cutting through to form), it is convenient to punch and break at the position of the groove structure during stamping to form two spaced-apart first and second cantilever structures, forming independent supports, reducing the interference of the middle wave arch by the wave arches on both sides, and having higher flexibility in stiffness support.

[0060] In some embodiments,

[0061] There are multiple window structures 101, and the multiple window structures 101 are spaced apart along the circumferential direction of the bearing surface 102; the first cantilever 4 and the second cantilever 5 of each window structure 101 are both formed by independent stamping.

[0062] The present invention also has multiple window structures. The multiple window structures are spaced apart along the circumferential direction of the bearing surface; the first cantilever and the second cantilever of each window structure are both formed by independent stamping, which can avoid situations such as unstable forming during stamping of a continuous support structure and solve the problem of unstable forming of a continuous support structure during stamping forming.

[0063] In some embodiments,

[0064] The bearing seat 2 is located on the outer periphery of the wave foil 1, and a circumferential limiting groove 201 is provided on the inner peripheral wall of the bearing seat 2. The circumferential limiting groove 201 is a concave groove formed from the inner peripheral wall of the bearing seat 2 towards the radially outer periphery. The cantilever structure is located on the outer periphery of the bearing surface 102 and protrudes outward. The cantilever structure of the window structure 101 can be inserted into the circumferential limiting groove 201 and contact the groove wall of the circumferential limiting groove 201 to form an elastic support.

[0065] The present invention also provides that a circumferential limiting groove is provided on the inner circumferential wall of the bearing seat. The circumferential limiting groove is a concave groove formed from the inner circumferential wall of the bearing seat towards the radially outer circumference. The cantilever structure is located on the outer circumference of the bearing surface and protrudes outwards, such that the cantilever structure of the windowing structure can be inserted into the circumferential limiting groove and contact the groove wall of the circumferential limiting groove to form an elastic support, further reducing the interference between each support unit and adjacent support units, and further enhancing the flexibility of the bearing support performance design.

[0066] In some embodiments,

[0067] There are multiple windowing structures 101, and the multiple windowing structures 101 are arranged at intervals along the circumferential direction of the bearing surface 102; there are also multiple circumferential limiting grooves 201, and the multiple circumferential limiting grooves 201 are arranged at intervals along the inner circumferential wall of the bearing seat 2 in the circumferential direction, and the windowing structures 101 and the circumferential limiting grooves 201 are arranged in one-to-one correspondence.

[0068] This is a further preferred structural form of the windowing structure and the circumferential limiting groove of the present invention. Through the multiple windowing structures arranged at intervals in the circumferential direction and the multiple circumferential limiting grooves arranged at intervals in the circumferential direction on the bearing seat, the multiple windowing structures and the multiple circumferential limiting grooves form a one-to-one correspondence and cooperation to form a plug-in connection. While limiting the two cantilevers of the corrugated foil, it can also play a supporting role in both circumferential directions and form a radial support for the top foil and the rotor on the inner side in the radial direction. The rotation direction during the operation of the bearing is not restricted and can be either left-handed or right-handed, and the support stiffness of the bearing is more flexible.

[0069] In some embodiments,

[0070] In the unfolded surface of the bearing surface 102, the windowing structure 101 is in an "I" shape. There are multiple windowing structures 101, and the multiple windowing structures 101 are arranged in a multi-row and multi-column structure on the bearing surface 102. The circumferential direction of the corrugated foil 1 is the extension direction of the row, and the axial direction of the corrugated foil 1 is the extension direction of the column;

[0071] The multi-row and multi-column windowing structures 101 are in a first regular arrangement form, and the adjacent two columns of windowing structures 101 are arranged opposite to each other along the circumferential direction of the corrugated foil 1; or the multi-row and multi-column windowing structures 101 are in a second regular arrangement form, and the adjacent two columns of windowing structures 101 are not arranged opposite to each other along the circumferential direction of the corrugated foil 1, and the multiple columns of windowing structures 101 are arranged alternately in sequence along the circumferential direction.

[0072] This is a further preferred structural form of the windowing structure of the present invention. The arrangement of the windowed support structure can be in the first regular form or the second regular form, such asFigure 4 , Figure 5 As shown, this greatly improves the design freedom, allowing the designer to carry out targeted design according to the actual distribution of the load. The mutually independent windowed support structure can be spot-stamped, which can also get rid of the problem of uneven forming caused by the connection of each arch in the traditional corrugated foil structure, and greatly improves the commonweal. At the same time, since each windowed structure has a circumferential limiting groove matching it, the elastic support structure can provide equivalent support when subjected to loads from the left and right directions, which also makes the rotation direction of the bearing no longer restricted.

[0073] In some embodiments,

[0074] A foil fixing groove 202 is further provided on the inner circumferential wall of the bearing housing 2. The circumferential one end of the corrugated foil 1 is formed as a fixed end 103 or both circumferential ends are formed as fixed ends 103. The fixed end 103 protrudes in the direction of the radial outside. The fixed end 103 is inserted into the foil fixing groove 202 to fix the corrugated foil 1.

[0075] The present invention also enables the fixed end to be inserted into the foil fixing groove through the foil fixing groove on the bearing housing and the fixed end at the circumferential one end of the corrugated foil, so as to fix the corrugated foil on the bearing housing.

[0076] The circumferential one end of the top foil of the present invention is formed as a top foil fixed end or both circumferential ends are formed as top foil fixed ends. The top foil fixed ends correspond to the fixed ends of the corrugated foil one by one. That is, when only the circumferential one end of the corrugated foil is formed as a corrugated foil fixed end, only the circumferential one end of the top foil is formed as a top foil fixed end, and the top foil fixed end and the corrugated foil fixed end are integrally inserted into the foil fixing groove to be fixed; when both circumferential ends of the corrugated foil are formed as corrugated foil fixed ends, both circumferential ends of the top foil are also formed as top foil fixed ends, and the two top foil fixed ends and the two corrugated foil fixed ends are integrally inserted into the foil fixing groove to be fixed.

[0077] The core structure of an open-window foil air bearing of the present invention includes a supporting foil (corrugated foil 1) and a bearing housing 2. The supporting foil is composed of a curved surface open-window elastic support structure (open-window structure 101), a load-bearing surface 102, and a fixed end 103. The bearing housing 2 is composed of a circumferential limiting groove 201 and a foil fixing groove 202. Among them, the curved surface open-window elastic support structure (open-window structure 101) is formed by engraving the corresponding basic contour on a flat foil, and then stamping it from one side of the foil to the other side with a special mold to form a curved surface open-window elastic support structure. A circumferential limiting groove 201 is provided on the corresponding bearing housing 2. The circumferential limiting groove 201 is a U-shaped groove structure with a large opening and symmetric large curvature at the edge. The symmetric edges with large curvature of the circumferential limiting groove 201 are aligned and assembled with the curved surface open-window elastic support structure (open-window structure 101). After the load-bearing surface 102 bears the load from the bearing rotor, the curved surface open-window elastic support structure (open-window structure 101) will slide along the symmetric curved surface with large curvature of the circumferential limiting groove (the transition curved surface between the circumferential limiting groove wall surface and the bearing housing) towards the groove wall of the circumferential limiting groove. After the load disappears or decreases, the curved surface open-window elastic support structure (open-window structure 101) will slide along the symmetric edge with large curvature of the axial limiting groove away from the groove wall direction of the circumferential limiting groove to form elastic support. Then, one end of the supporting foil (corrugated foil 1) is bent towards the open-window side according to the design requirements to form the fixed end 103. After bending the whole supporting foil (as shown in Figure 2 ), it is inserted into the bearing housing 2. The fixed end 103 is embedded in the foil fixing groove 202. Finally, the top foil (top foil 3) is installed and the fixed end of the top foil is also embedded in the foil fixing groove 202 to complete the assembly of the whole bearing.

[0078] The present invention also provides a motor, which includes the aforementioned air bearing.

[0079] The present invention provides a symmetric curved surface open-window elastic support structure with high design freedom and a bearing housing that cooperates with it. Each open-window elastic support structure is independently stamped, which can avoid the problem of unstable forming during the stamping of the continuous support structure. There is a circumferential limiting groove on the bearing housing that matches the open-window elastic support structure, which can reduce the interference between each support unit, improve the flexibility of the bearing support performance design, and due to the existence of the circumferential limiting groove, the working rotation direction of the bearing is not restricted.

[0080] The present invention can solve the following technical problems:

[0081] 1. The problem that the rotation direction during the operation of the bearing is restricted and can only rotate in a fixed direction;

[0082] 2. The problem that the support stiffness of the bearing cannot be flexibly changed in design;

[0083] 3. The problem of unstable forming during the stamping of the continuous support structure.

[0084] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention. The above is only the preferred implementation manner of the present invention. It should be noted that for those of ordinary skill in the art, several improvements and variations can be made without departing from the technical principle of the present invention, and these improvements and variations should also be regarded as within the protection scope of the present invention.

Claims

1. An air bearing, characterized in that: Including: A wave foil (1), a top foil (3) and a bearing housing (2), wherein the wave foil (1) includes a bearing surface (102) and a window structure (101), the window structure (101) includes a cantilever structure arranged on the bearing surface (102), the cantilever structure includes a first cantilever (4) and a second cantilever (5) spaced circumferentially along the wave foil (1), one end of the first cantilever (4) is connected to the bearing surface (102), and the other end extends towards the first circumferential direction to form a first free end, one end of the second cantilever (5) is connected to the bearing surface (102), and the other end extends towards the second circumferential direction to form a second free end, the first circumferential direction is opposite to the second circumferential direction; the first cantilever (4) and the second cantilever (5) can respectively contact the bearing housing (2) or the top foil (3) to provide elastic support in two different circumferential directions.

2. The air bearing according to claim 1, characterized in that: The first free end of the first cantilever (4) extends towards the direction of the second cantilever (5), and the second free end of the second cantilever (5) extends towards the direction of the first cantilever (4), so that the first free end and the second free end are arranged opposite to each other, and the distance between the first free end and the second free end is greater than a preset distance of 0.

3. The air bearing according to claim 2, characterized in that: The two relatively and spaced first cantilevers (4) and second cantilevers (5) are cantilever structures formed simultaneously by stamping on the bearing surface (102) and disconnecting the bearing surface (102).

4. The air bearing according to claim 3, characterized in that: Before stamping, a groove structure is cut on the bearing surface (102), the groove structure penetrates the upper and lower bottom surfaces of the bearing surface (102), and then the groove structure is stamped to form the first cantilever (4) and the second cantilever (5).

5. The air bearing according to claim 3, characterized in that: There are multiple window structures (101), and the multiple window structures (101) are spaced circumferentially along the bearing surface (102); the first cantilever (4) and the second cantilever (5) of each window structure (101) are formed by independent stamping.

6. The air bearing according to claim 1, characterized in that: The bearing housing (2) is located on the outer periphery of the wave foil (1), and a circumferential limiting groove (201) is arranged on the inner peripheral wall of the bearing housing (2), the circumferential limiting groove (201) is a concave groove formed from the inner peripheral wall of the bearing housing (2) towards the radially outer periphery, the cantilever structure is located on the outer periphery of the bearing surface (102) and protrudes outwards, and the cantilever structure of the window structure (101) can be inserted into the circumferential limiting groove (201) and contact the groove wall of the circumferential limiting groove (201) to form elastic support.

7. The elastic support structure of the air bearing according to claim 6, characterized in that: The window structures (101) are multiple, and the multiple window structures (101) are arranged at intervals along the circumferential direction of the bearing surface (102); the circumferential limiting grooves (201) are also multiple, and the multiple circumferential limiting grooves (201) are arranged at intervals along the inner circumferential wall of the bearing housing (2) in the circumferential direction, and the window structures (101) and the circumferential limiting grooves (201) are arranged in one-to-one correspondence.

8. The air bearing according to any one of claims 1-7, characterized in that: In the unfolded surface of the bearing surface (102), the window structure (101) is in an "I" shape, the window structures (101) are multiple, and the multiple window structures (101) are arranged in a multi-row and multi-column structure on the bearing surface (102). The circumferential direction of the corrugated foil (1) is the extension direction of the row, and the axial direction of the corrugated foil (1) is the extension direction of the column; Among the multi-row and multi-column window structures (101), two adjacent columns of the window structures (101) are arranged opposite to each other along the circumferential direction of the corrugated foil (1); or among the multi-row and multi-column window structures (101), two adjacent columns of the window structures (101) are not arranged opposite to each other along the circumferential direction of the corrugated foil (1), and multiple columns of the window structures (101) are arranged alternately in sequence along the circumferential direction.

9. The air bearing according to any one of claims 1-8, characterized in that: A foil fixing groove (202) is further provided on the inner circumferential wall of the bearing housing (2). One circumferential end of the corrugated foil (1) is formed as a fixed end (103) or both circumferential ends are formed as fixed ends (103). The fixed end (103) protrudes in the radially outward direction, and the fixed end (103) is inserted into the foil fixing groove (202) to fix the corrugated foil (1).

10. A motor, characterized in that: An air bearing including any one of claims 1-9.

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