Elastic embedded supporting structure foil, air bearing and motor

Abstract

The invention provides an elastic embedded type supporting structure foil, an air bearing and a motor, the elastic embedded type supporting structure foil comprises a positioning foil and an elastic supporting piece, the positioning foil is provided with an elastic supporting piece positioning hole, the elastic supporting piece positioning hole penetrates through the two opposite side end faces of the positioning foil, and the elastic supporting piece positioning hole is arranged in the positioning foil. The elastic supporting piece can be bent and clamped in the elastic supporting piece positioning hole, the part, protruding out of the end face of one side of the positioning foil piece, of the elastic supporting piece can make contact with the top-layer foil piece, and the part, protruding out of the end face of the other side of the positioning foil piece, of the elastic supporting piece can make contact with a bearing seat. The elastic supporting piece can elastically deform and bend to form a gap where air can enter so as to provide gas supporting. According to the air bearing, the degree of freedom of self-design can be improved, and the problems that according to an existing air bearing, the bearing rigidity cannot be finely and specifically adjusted at different positions and the like are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of air bearings, and particularly to an elastic embedded support structure foil, an air bearing and an electric motor. Background Art

[0002] The elastic foil hydrodynamic bearing composed of a top foil and an arch foil is the most common bearing form at present. There are some typical problems with such bearings:

[0003] 1. Its bearing stiffness gradually decreases from the fixed end to the free end, and fine-tuning and targeted adjustment cannot be performed.

[0004] 2. The parameters of the bearing support arch, the friction between the foils and between the foils and the bearing housing provide the stiffness and damping required for the bearing, and cannot be adjusted after processing and forming.

[0005] 3. Once the width of the arched foil is large during stamping, or when the center area of the arched foil is grooved, problems such as insufficient forming of the support arch parameters at the edge of the arched flap compared to the center area or deformation due to extrusion by the extrusion plate during stamping are likely to occur.

[0006] Due to the technical problems in the air bearings in the prior art, such as the bearing stiffness cannot be finely and targeted adjusted at different positions, the present invention researches and designs an elastic embedded support structure foil, an air bearing and an electric motor. Summary of the Invention

[0007] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the bearing stiffness of the air bearings in the prior art cannot be finely and targeted adjusted at different positions, so as to provide an elastic embedded support structure foil, an air bearing and an electric motor.

[0008] To solve the above problems, the present invention provides an elastic embedded support structure foil, which includes:

[0009] A positioning foil and an elastic support sheet. The positioning foil is provided with elastic support sheet positioning holes that penetrate through the opposite side end faces of the positioning foil. The elastic support sheet can be bent and clamped in the elastic support sheet positioning holes. The part of the elastic support sheet protruding from one side end face of the positioning foil can contact the top foil, and the part of the elastic support sheet protruding from the other side end face of the positioning foil can contact the bearing housing. The elastic support sheet can undergo elastic deformation and bend to form a gap into which air can enter to provide gas support.

[0010] In some embodiments,

[0011] The elastic support sheet includes a support body and support feet. One end of the support body is connected to one of the support feet, and the other end of the support body is connected to the other support foot. When the elastic support sheet is clamped into the elastic support sheet positioning hole, at least part of the support body is located on the side of the positioning foil facing the top foil, and at least part of the support foot is located on the side of the positioning foil facing the bearing seat. The support body has a support arch that bends and protrudes in a direction away from the support foot.

[0012] In some embodiments,

[0013] A positioning card slot is formed at the position where the support foot is connected to the support body. Two opposite side surfaces of the elastic support sheet positioning hole are formed as clamping end faces. The positioning card slot on one side of the support body is clamped on one of the clamping end faces, and the positioning card slot on the other side of the support body is clamped on the other clamping end face.

[0014] In some embodiments,

[0015] The clamping end faces are two opposite end faces of the positioning foil along the circumferential direction; the part from the positioning card slot to the free end of the support foot is formed into a structure of a cantilever beam.

[0016] In some embodiments,

[0017] The maximum distance between the free ends of two opposite support feet is l, the minimum distance between the positioning card slots on one side of the support body and the positioning card slots on the other side of the support body is l1, the width of the free end of the support foot is a, the maximum width of the support foot is b1, the width of the support body is b2, the positioning card slots on one side of the support body are two relatively arranged, and the minimum distance between two opposite positioning card slots on the same side is b3, and the following relationships are satisfied: ① a ≤ b1; ② b1 > b3 + 1; ③ b2 > b3 + 1.

[0018] In some embodiments,

[0019] The dimension of the elastic support sheet positioning hole along the circumferential direction of the positioning foil is L1, the dimension along the axial direction of the positioning foil is b, the interval distance between two adjacent elastic support sheet positioning holes along the circumferential direction of the positioning foil is L, and the included angle θ between two opposite faces on both sides of the support foot is the opening angle of the support foot, and the following relationships are satisfied: ④ b2 = b; ⑤ L > l - l1; ⑥ l > l1; ⑦ l1 > L1; ⑧ 0° < θ < 180°.

[0020] In some embodiments,

[0021] The elastic support sheet positioning holes are multiple, and the multiple elastic support sheet positioning holes are spaced apart on the positioning foil. Also, the elastic support sheets are multiple, and the elastic support sheets are respectively and correspondingly clamped with the elastic support sheet positioning holes.

[0022] In some embodiments,

[0023] The positioning foil includes a long side and a wide side, the length of the long side is greater than the length of the wide side, and the multiple elastic support sheet positioning holes are arranged in a multi-row and multi-column structure on the positioning foil. The extending direction of the rows is along the long side direction of the positioning foil, and the extending direction of the columns is along the wide side direction of the positioning foil.

[0024] Among the multi-row and multi-column elastic support sheet positioning holes, two adjacent columns of elastic support sheet positioning holes are oppositely arranged along the long side direction of the positioning foil; or among the multi-row and multi-column elastic support sheet positioning holes, two adjacent columns of elastic support sheet positioning holes are not oppositely arranged along the long side direction of the positioning foil, and multiple columns of elastic support sheet positioning holes are alternately arranged in sequence along the long side direction.

[0025] The circumferential direction of the positioning foil is its long side direction, and the axial direction of the positioning foil is its wide side direction.

[0026] The present invention further provides an air bearing, which includes the aforementioned elastic embedded support structure foil, and further includes a top foil and a bearing housing. The top foil is located on the inner circumference of the elastic embedded support structure foil, the bearing housing is located on the outer circumference of the elastic embedded support structure foil, the part of the elastic support sheet facing radially inward can contact the top foil, and the part of the elastic support sheet facing radially outward can contact the bearing housing.

[0027] The present invention further provides a motor, which includes the aforementioned air bearing.

[0028] The elastic embedded support structure foil, air bearing and motor provided by the present invention have the following beneficial effects:

[0029] 1. The present invention is provided with a positioning foil and an elastic support sheet. An elastic support sheet positioning hole is provided on the positioning foil. The elastic support sheet is bent and clamped in the elastic support sheet positioning hole. The part of the elastic support sheet protruding from one end face of the positioning foil can contact the top foil, and the part of the elastic support sheet protruding from the other end face of the positioning foil can contact the bearing housing. It can accommodate gas to enter and form a support through the elastic deformation + bending clearance of the elastic support sheet, and can form an air dynamic bearing. The elastic embedded support structure can replace the support arch structure to form an independent support foil structure. It can perform targeted variable stiffness design and adjustment according to the load distribution of the bearing accurate to the support unit (each elastic support sheet is processed separately, and preferably the cutting process is used to process each elastic support sheet separately). At the same time, the detachable support unit also brings great convenience to the after-sales maintenance of the bearing, improves the degree of freedom of self-design, and can effectively solve the problems existing in the existing air bearings, such as the bearing stiffness cannot be finely and targeted adjusted at different positions.

[0030] 2. The present invention adopts an independent elastic embedded support structure to cancel the stamping process, which can effectively avoid the uncontrollability of the stamping process and solve the problems such as insufficient forming or being extruded and deformed by the extrusion plate during the stamping forming of the arched foil. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a front cross-sectional structural schematic diagram of an air bearing including an elastic embedded support structure foil in the first embodiment of the present invention;

[0032] Figure 2 is a front cross-sectional structural schematic diagram of the bearing housing of the air bearing of the present invention;

[0033] Figure 3 is a top view structural diagram of the elastic support sheet in the elastic embedded support structure foil of the present invention;

[0034] Figure 4 is an unfolded top view when the positioning foil in the elastic embedded support structure foil of the present invention is arranged according to the first rule;

[0035] Figure 5 is an unfolded top view when the positioning foil in the elastic embedded support structure foil of the present invention is arranged according to the second rule;

[0036] Figure 6 is an unfolded three-dimensional structural diagram when the positioning foil in the elastic embedded support structure foil of the present invention is arranged according to the first rule;

[0037] Figure 7 is an unfolded three-dimensional structural diagram when the positioning foil in the elastic embedded support structure foil of the present invention is arranged according to the second rule;

[0038] Figure 8 It is a three-dimensional structure diagram of the elastic support sheet in the elastic embedded support structure foil of the present invention;

[0039] Figure 9 It is a front sectional structure schematic diagram of an air bearing including an elastic embedded support structure foil according to the second embodiment of the present invention.

[0040] The reference numerals are indicated as:

[0041] 1. Top foil; 2. Bearing seat; 201. Foil fixing groove; 202. Inner peripheral surface of the bearing seat; 3. Positioning foil; 301. Elastic support sheet positioning hole; 302. Clamping end face; 4. Elastic support sheet; 401. Support body; 402. Support leg; 403. Positioning card slot. Specific embodiments

[0042] 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 only illustrative and in no way limits the present invention and its application or use. Based on the embodiments of 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.

[0043] 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.

[0044] 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 relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific values 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, it does not need to be further discussed in subsequent drawings.

[0045] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by orientation terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" are generally based on the orientation or positional relationships shown in the drawings. These terms are only for the convenience of describing the present invention and simplifying the description. Without contrary statements, these orientation terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the protection scope of the present invention; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0046] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above" can be used here to describe the spatial positional relationship between a device or feature shown in the drawings and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the drawings of the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" 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 corresponding interpretations should be made for the spatial relative descriptions used here.

[0047] In addition, it should be noted that the use of words such as "first", "second" to limit components is only for the convenience of differentiating the corresponding components. Without otherwise stating, the above words have no special meanings. Therefore, they should not be construed as limiting the protection scope of the present invention.

[0048] As Figures 1-8As shown in the figure, the present invention provides an elastic embedded support structure foil, which includes:

[0049] A positioning foil 3 and an elastic support sheet 4. An elastic support sheet positioning hole 301 is provided on the positioning foil 3. The elastic support sheet positioning hole 301 penetrates through the opposite two end faces of the positioning foil 3. The elastic support sheet 4 can be bent and clamped in the elastic support sheet positioning hole 301. The part of the elastic support sheet 4 protruding from one end face of the positioning foil 3 can contact the top foil 1, and the part of the elastic support sheet 4 protruding from the other end face of the positioning foil 3 can contact the bearing seat 2. The elastic support sheet 4 can undergo elastic deformation and bend to form a gap into which air can enter to provide gas support.

[0050] By setting the positioning foil and the elastic support sheet in the present invention, an elastic support sheet positioning hole is provided on the positioning foil. The elastic support sheet is bent and clamped in the elastic support sheet positioning hole. The part of the elastic support sheet protruding from one end face of the positioning foil can contact the top foil, and the part of the elastic support sheet protruding from the other end face of the positioning foil can contact the bearing seat. It can accommodate gas to enter and form support through the elastic deformation + bending gap of the elastic support sheet, and can form an air dynamic bearing. The elastic embedded support structure can replace the support arch structure to form an independent support foil structure. It can perform targeted variable stiffness design and adjustment according to the load distribution of the bearing accurate to the support unit (each elastic support sheet is processed separately, and preferably each elastic support sheet is processed separately by cutting). At the same time, the detachable support unit also brings great convenience to the after-sales maintenance of the bearing, improves the freedom of self-design, and can effectively solve the problems existing in the existing air bearings, such as the bearing stiffness cannot be finely and targeted adjusted at different positions.

[0051] The elastic support unit of the elastic embedded radial foil bearing provided by the present invention is composed of a positioning foil 3 ( Figures 4-5 as shown), an elastic support sheet 4 ( Figure 3 as shown). Among them, the positioning foil 3 is responsible for determining the distribution position of each elastic support structure and firmly fixing each elastic support structure. The elastic support sheet 4 becomes independent elastic support units by bending and embedding into the positioning foil 3 itself ( Figures 6-7 as shown).

[0052] The present invention adopts an independent elastic embedded support structure to cancel the stamping process, which can effectively avoid the uncontrollability existing in the stamping process and solve problems such as insufficient forming during the stamping of the arched foil or being extruded and deformed by the extrusion plate during stamping.

[0053] In some embodiments,

[0054] The elastic support sheet 4 includes a support body 401 and support feet 402. One end of the support body 401 is connected to one of the support feet 402, and the other end of the support body 401 is connected to the other support foot 402. When the elastic support sheet 4 is clamped into the elastic support sheet positioning hole 301, at least part of the support body 401 is located on the side of the positioning foil 3 facing the top foil 1, and at least part of the support foot 402 is located on the side of the positioning foil 3 facing the bearing seat 2. The support body 401 has a support arch that bends and protrudes in a direction away from the support feet 402.

[0055] This is a preferred structural form of the elastic support sheet of the present invention. It preferably includes a support body and support feet. The support body has a support arch that bends and protrudes in a direction away from the support feet, which can contact the top foil on the radially inner circumference to form elastic support for the top foil. The bending space formed by the support arch can be filled with gas to form gas support, thus forming a gas bearing support form of elastic + gas support. The support feet are used to connect with the elastic support sheet positioning hole and extend to the other side, and can firmly fix each support body to the elastic support sheet positioning hole.

[0056] The improvement of the present invention lies in:

[0057] 1. The spindle-shaped independent and detachable elastic support sheet of the present invention can achieve different support effects by adjusting the structural parameters of the elastic support sheet;

[0058] 2. The elastic support sheet of the present invention can be arbitrarily arranged on the positioning foil according to design requirements (meeting the design requirements), making the design of the bearing have great flexibility.

[0059] The present invention can solve the following technical problems:

[0060] 1. The elastic embedded support structure can be used to replace the support arch structure, improving the degree of freedom of self-design and solving the problem of inability to carry out targeted design and adjustment according to different positions;

[0061] 2. The elastic embedded support structure cancels the stamping process, effectively avoiding the uncontrollability existing in the stamping process and solving the problem of deformation caused by stamping.

[0062] In some embodiments,

[0063] A positioning card slot 403 is formed at the position where the support foot 402 is connected to the support body 401. Two opposite side faces on the elastic support sheet positioning hole 301 are formed as clamping end faces 302. The positioning card slot 403 on one side of the support body 401 is clamped on one of the clamping end faces 302, and the positioning card slot 403 on the other side of the support body 401 is clamped on the other clamping end face 302.

[0064] Through the positioning card slots formed at the connection positions between the supporting feet and the supporting body, the present invention can effectively snap the supporting feet and the supporting body onto the positioning holes of the elastic supporting sheet, ensuring that the elastic supporting sheet is not easily detached. Positioning card slots are provided at both sides of the supporting body where it is connected to the supporting feet, which can cooperate with two opposite clamping end faces on the positioning holes for clamping, ensuring that both sides of the elastic supporting sheet can be effectively clamped, enabling the elastic supporting sheet to be movably snapped onto the positioning holes, capable of undergoing appropriate elastic deformation and movement, improving the elastic + gas support effect, and ensuring the stable supporting performance of the air bearing.

[0065] The elastic supporting sheet of the present invention is composed of three parts: a supporting curved surface (supporting body 401), supporting feet 402, and positioning card slots 403. The supporting curved surface is in direct contact with the top foil. In its independent state, it is a flat small metal sheet, and after being bent and embedded, it becomes an independent supporting unit. The supporting curved surface is responsible for supporting the top foil. After it is bent itself, it is limited by the positioning holes 301 of the elastic supporting sheet, and the deformation it can generate is already very small. More elastic support is provided by the supporting feet 402. The supporting feet 402 approximate a cantilever beam structure after the elastic supporting sheet 4 is inserted into the positioning foil 3, extending from the positioning card slots 403 to the end.

[0066] For the assembly of the elastic supporting sheet 4 of the present invention, it is necessary to bend the two supporting feet 402 to one side, insert the side with the middle force - induced bending bulge into the positioning holes 301 of the elastic supporting sheet. When the positioning card slots 403 on both sides are aligned with the clamping end faces 302 of the positioning foil 3, release the supporting feet, and let the elastic supporting sheet 4 freely rebound and firmly lock in place.

[0067] In some embodiments,

[0068] The clamping end faces 302 are two opposite end faces of the positioning foil 3 along the circumferential direction; the part from the positioning card slots 403 to the free ends of the supporting feet 402 is formed into a cantilever beam structure.

[0069] This is the preferred structural form of the clamping end faces of the present invention, that is, the clamping end faces are two opposite end faces of the positioning foil along the circumferential direction, which can enable the two supporting feet to be clamped in the positioning holes along the circumferential direction of the positioning foil. When the top foil on the inner circumference is subjected to pressure extrusion, the supporting arch of the supporting body forms a downward pressure deformation in two circumferential directions, and the gas cavity below the supporting arch provides support, thereby effectively providing support for the top foil on the inner circumference of the top foil and even for the inner - rotating rotor; the part between the positioning card slots and the free ends of the supporting feet of the present invention is formed into a cantilever beam structure, which can generate elastic deformation by connecting with the outer - circumference bearing seat through this cantilever beam, and further enhance the elastic + gas support effect on the top foil and the rotor on the inner circumference of the supporting foil, improving the supporting stability of the air bearing.

[0070] In some embodiments,

[0071] The maximum distance between the free ends of two opposite feet 402 is l, the minimum distance between the positioning card slots 403 on one side of the support body 401 and the positioning card slots 403 on the other side of the support body 401 is l1, the width of the free end of the foot 402 is a, the maximum width of the foot 402 is b1, the width of the support body 401 is b2, there are two relatively arranged positioning card slots 403 on one side of the support body 401, and the minimum distance between two opposite positioning card slots 403 on the same side is b3, and the following relationships are satisfied: ① a ≤ b1; ② b1 > b3 + 1; ③ b2 > b3 + 1.

[0072] The elastic support sheet of the present invention has many structural parameters. The flexible layout of the changes and combinations of these structural parameters enables an elastic embedded radial foil bearing to have extremely high design freedom and adjustability. Among the parameters of the elastic support structure and the positioning foil of the present invention, the difference between l and l1 determines the lengths of the support surface (support body 401) and the feet 402, the length difference between L1 and l1 determines the curvature and height of the support surface, θ determines the opening angle of the feet 402 and the value range of a, b1 determines the initial width of the feet 402, where l, l1, θ, and b1 determine the dynamic support stiffness that the feet 402 can provide, a determines the contact damping that a single foot 402 can provide, and the design values of the above parameters also need to meet the following requirements: ① a ≤ b1; ② b1 > b3 + 1; ③ b2 > b3 + 1; ④ b2 = b; ⑤ L > l - l1; ⑥ l > l1; ⑦ l1 > L1; ⑧ 0° < θ < 180°; On the premise of meeting the above value requirements, the value of each parameter is flexibly variable, and the designer can flexibly change according to the actual design requirements. However, it is necessary to ensure that when the width d of the positioning card slot 301 of the elastic support sheet is embedded in the positioning foil 3, while the positioning card slot of the support surface is in contact with the positioning foil, the upper and lower sides of the positioning card slot on the side of the feet are not in contact with the positioning foil at the same time, so as to effectively ensure that the elastic support sheet has space for up and down movement, providing conditions for the elastic support sheet to undergo elastic deformation and improving the multi-freedom of the support performance.

[0073] In some embodiments,

[0074] The dimension of the elastic support sheet positioning hole 301 along the circumferential direction of the positioning foil 3 is L1, the dimension along the axial direction of the positioning foil 3 is b, the interval distance between two adjacent elastic support sheet positioning holes 301 along the circumferential direction of the positioning foil 3 is L, the included angle θ between the two opposite surfaces on both sides of the foot 402 is the opening angle of the foot, and the following relationships are satisfied: ④ b2 = b; ⑤ L > l - l1; ⑥ l > l1; ⑦ l1 > L1; ⑧ 0° < θ < 180°.

[0075] The arrangement of the elastic support sheet positioning holes on the positioning foil of the present invention is divided into two regular arrangement forms, as Figures 6-7 shown. However, regardless of which arrangement, the arrangement pitch of the elastic support sheet positioning holes in the circumferential direction needs to meet the design requirement ⑤ L > l - l1 to ensure that when two adjacent legs are completely flattened, they will not interfere with each other.

[0076] In some embodiments,

[0077] There are multiple elastic support sheet positioning holes 301, and the multiple elastic support sheet positioning holes 301 are distributed at intervals on the positioning foil 3. Moreover, there are also multiple elastic support sheets 4, and the elastic support sheets 4 are correspondingly clamped with the elastic support sheet positioning holes 301 one by one.

[0078] Through the design of correspondingly clamping one by one of multiple elastic support positioning holes and multiple elastic support sheets, the present invention can increase the support area on the positioning foil, improve the support performance for the top foil on the inner circumference and the rotor. Each elastic support sheet is processed separately, which improves the degree of freedom of self - design, can effectively solve problems such as the bearing stiffness of the existing air bearings cannot be finely and specifically adjusted at different positions. At the same time, the detachable support unit also brings great convenience to the after - sales maintenance of the bearing.

[0079] In some embodiments,

[0080] The positioning foil 3 includes a long side and a wide side, and the length of the long side is greater than the length of the wide side. The multiple elastic support sheet positioning holes 301 are arranged in a multi - row and multi - column structure on the positioning foil 3. The extending direction of the row is along the long side direction of the positioning foil 3, and the extending direction of the column is along the wide side direction of the positioning foil 3;

[0081] Among the multi - row and multi - column elastic support sheet positioning holes 301, two adjacent columns of the elastic support sheet positioning holes 301 are relatively arranged along the long side direction of the positioning foil 3; or among the multi - row and multi - column elastic support sheet positioning holes 301, two adjacent columns of the elastic support sheet positioning holes 301 are not relatively arranged along the long side direction of the positioning foil 3, and multiple columns of the elastic support sheet positioning holes 301 are alternately arranged in sequence along the long side direction;

[0082] The circumferential direction of the positioning foil 3 is the direction of its long side, and the axial direction of the positioning foil 3 is the direction of its wide side. That is, among the elastic support sheet positioning holes 301 arranged in multiple rows and multiple columns, two adjacent columns of the elastic support sheet positioning holes 301 are arranged opposite to each other along the circumferential direction of the positioning foil 3; or among the elastic support sheet positioning holes 301 arranged in multiple rows and multiple columns, two adjacent columns of the elastic support sheet positioning holes 301 are not arranged opposite to each other along the circumferential direction of the positioning foil 3, and multiple columns of the elastic support sheet positioning holes 301 are arranged staggered in sequence along the circumferential direction.

[0083] This is a further preferred structural form of the elastic support sheet of the present invention. The arrangement of the elastic support sheet and the positioning holes can be the first regular arrangement form and the second regular arrangement form. As Figures 4-5 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 elastic support structures can be stamped at fixed points, 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 elastic support sheet structure has a circumferential positioning hole matching it, the elastic support structure can provide equivalent support when subjected to loads from the left and right directions, which makes the rotation direction of the bearing no longer restricted.

[0084] The present invention also provides an air bearing, which includes the aforementioned elastic embedded support structure foil, and further includes a top layer foil 1 and a bearing seat 2. The top layer foil 1 is located on the inner circumference of the elastic embedded support structure foil, the bearing seat 2 is located on the outer circumference of the elastic embedded support structure foil, the part of the elastic support sheet 4 facing radially inward can contact the top layer foil 1, and the part of the elastic support sheet 4 facing radially outward can contact the bearing seat 2.

[0085] The elastic embedded radial foil bearing of the present invention includes several major structures such as a top layer foil 1, a bearing seat 2, a positioning foil 3, and an elastic support sheet 4 ( Figure 1 shown). The elastic embedded radial foil bearing of the present invention uses an independent elastic embedded support structure to replace the traditional arched foil to play the role of elastic support. Compared with the traditional stamped arched foil, it has remarkable effects in terms of improving design freedom, adjustability, and process simplification.

[0086] As Figure 1, which is the first implementation mode of the present invention. After all the elastic support sheets 4 are embedded in the positioning foil 3, the assembly of the elastic support layer is completed. At this time, one end of the positioning foil 3 that completely embeds the elastic support sheet 4 is bent towards the support leg side according to the design to form a fixed end, and the other end becomes a free end. Similarly, for the top foil 1, one end is bent towards the side without coating to form a fixed end according to the design requirements, and the other end becomes a free end. When assembling to the bearing housing, wrap the top foil 1 inside the support foil layer, and then embed the two together into the foil fixing groove 201 of the bearing housing 2 to complete the preparation of the complete bearing. When the support foil layer wraps the top foil 1, it can be wrapped in the same direction or in the opposite direction. There are no specific requirements here, and it is subject to the actual design.

[0087] Such as Figure 9 , which is the second implementation mode of the present invention. Both free ends of the positioning foil 3 are bent to form fixed ends, and both free ends of the top foil are also bent to form fixed ends, and then they are inserted together into the foil fixing groove of the bearing housing.

[0088] The present invention also provides a motor, which includes the aforementioned air bearing.

[0089] 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 in the protection scope of the present invention. The above is only the preferred implementation mode of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present invention, several improvements and variations can still be made, and these improvements and variations should also be regarded as within the protection scope of the present invention.

Claims

1. An elastic embedded support structure foil, characterized in that: Including: A positioning foil (3) and an elastic support piece (4), wherein an elastic support piece positioning hole (301) is provided on the positioning foil (3), and the elastic support piece positioning hole (301) penetrates through the opposite two end faces of the positioning foil (3). The elastic support piece (4) can be bent and clamped in the elastic support piece positioning hole (301). The part of the elastic support piece (4) protruding from one end face of the positioning foil (3) can contact the top layer foil (1), and the part of the elastic support piece (4) protruding from the other end face of the positioning foil (3) can contact the bearing seat (2). The elastic support piece (4) can undergo elastic deformation and bend to form a gap into which air can enter to provide gas support.

2. The elastic embedded support structure foil according to claim 1, characterized in that: The elastic support piece (4) includes a support body (401) and support feet (402). One end of the support body (401) is connected to one of the support feet (402), and the other end of the support body (401) is connected to the other support foot (402). When the elastic support piece (4) is clamped into the elastic support piece positioning hole (301), at least part of the support body (401) is located on the side of the positioning foil (3) facing the top layer foil (1), and at least part of the support feet (402) is located on the side of the positioning foil (3) facing the bearing seat (2). The support body (401) has a support arch that bends and protrudes in a direction away from the support feet (402).

3. The elastic embedded support structure foil according to claim 2, characterized in that: A positioning card slot (403) is formed at the position where the support feet (402) are connected to the support body (401). Two opposite side faces on the elastic support piece positioning hole (301) are formed as clamping end faces (302). The positioning card slot (403) on one side of the support body (401) is clamped on one of the clamping end faces (302), and the positioning card slot (403) on the other side of the support body (401) is clamped on the other clamping end face (302).

4. The elastic embedded support structure foil according to claim 3, characterized in that: The clamping end faces (302) are two opposite end faces of the positioning foil (3) in the circumferential direction; the part from the positioning card slot (403) to the free end of the support feet (402) is formed as a structure of a cantilever beam.

5. The elastic embedded support structure foil according to claim 3 or 4, characterized in that: The maximum distance between the free ends of two opposite feet (402) is l, the minimum distance between the positioning slots (403) on one side of the support body (401) and the positioning slots (403) on the other side of the support body (401) is l1, the width of the free end of the foot (402) is a, the maximum width of the foot (402) is b1, the width of the support body (401) is b2, the positioning slots (403) on one side of the support body (401) are two opposite ones, and the minimum distance between two opposite positioning slots (403) on the same side is b3, and the following relationships are satisfied: ① a ≤ b1; ② b1 > b3 + 1; ③ b2 > b3 + 1.

6. The elastic embedded support structure foil according to claim 5, characterized in that: The dimension of the elastic support sheet positioning hole (301) in the circumferential direction of the positioning foil (3) is L1, the dimension in the axial direction of the positioning foil (3) is b, the spacing distance between two adjacent elastic support sheet positioning holes (301) in the circumferential direction of the positioning foil (3) is L, the included angle θ between the opposite faces on both sides of the foot (402) is the opening angle of the foot, and the following relationships are satisfied: ④ b2 = b; ⑤ L > l - l1; ⑥ l > l1; ⑦ l1 > L1; ⑧ 0° < θ < 180°.

7. The elastic embedded support structure foil according to any one of claims 1-6, characterized in that: There are multiple elastic support sheet positioning holes (301), and the multiple elastic support sheet positioning holes (301) are spaced apart and distributed on the positioning foil (3), and there are also multiple elastic support sheets (4), and the elastic support sheets (4) are respectively and correspondingly clamped with the elastic support sheet positioning holes (301).

8. The elastic embedded support structure foil according to claim 7, characterized in that: The positioning foil (3) includes a long side and a wide side, the length of the long side is greater than the length of the wide side, and the multiple elastic support sheet positioning holes (301) are arranged in a multi-row and multi-column structure on the positioning foil (3), the extension direction of the row is along the long side direction of the positioning foil (3), and the extension direction of the column is along the wide side direction of the positioning foil (3); Among the multi-row and multi-column elastic support sheet positioning holes (301), two adjacent columns of elastic support sheet positioning holes (301) are oppositely arranged along the long side direction of the positioning foil (3); or among the multi-row and multi-column elastic support sheet positioning holes (301), two adjacent columns of elastic support sheet positioning holes (301) are not oppositely arranged along the long side direction of the positioning foil (3), and multiple columns of elastic support sheet positioning holes (301) are alternately arranged in sequence along the long side direction; The circumferential direction of the positioning foil (3) is its long side direction, and the axial direction of the positioning foil (3) is its wide side direction.

9. An air bearing, characterized in that: It includes the elastic embedded support structure foil as described in any one of claims 1-8, and further includes a top layer foil (1) and a bearing seat (2). The top layer foil (1) is located on the inner circumference of the elastic embedded support structure foil, and the bearing seat (2) is located on the outer circumference of the elastic embedded support structure foil. The portion of the elastic support sheet (4) facing radially inward can contact the top layer foil (1), and the portion of the elastic support sheet (4) facing radially outward can contact the bearing seat (2).

10. A motor, characterized in that: It includes the air bearing as described in claim 9.

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