WO2024027289A1

WO2024027289A1 - Axial bearing, compressor, and heating and ventilation equipment

Info

Publication number: WO2024027289A1
Application number: PCT/CN2023/095784
Authority: WO
Inventors: 刘鹏辉; 刘树清; 贺伟衡; 刘胜; 李镇杉; 吴昕; 张超; 阳媛
Original assignee: 广东美的暖通设备有限公司; 重庆美的通用制冷设备有限公司; 美的集团股份有限公司
Priority date: 2022-07-30
Filing date: 2023-05-23
Publication date: 2024-02-08
Also published as: CN115263912A

Abstract

An axial bearing, comprising a mounting base (3), a bump foil assembly (1) and a top foil assembly (2). The bump foil assembly (1) comprises a first positioning part (11) and bump foils (12); the plurality of bump foils (12) are connected to the first positioning part (11) and are arranged circumferentially around the first positioning part (11); each bump foil (12) is provided with a corrugated section (122); the top foil assembly (2) comprises a second positioning part (21) and top foils (22); the plurality of top foils (22) are connected to the second positioning part (21) and are arranged circumferentially around the second positioning part (21); the plurality of top foils (22) are opposite to the plurality of bump foils (12); the mounting base (3), the bump foils (12) and the top foils (22) are stacked. Also provided are a compressor and heating and ventilation equipment.

Description

Axial bearings, compressors and HVAC equipment

Cross-references to related applications

This application claims priority to the Chinese patent application submitted to the China Patent Office on July 30, 2022, with the application number CN202210912655.0 and the application name "Axial Bearings, Compressors and HVAC Equipment", the entire content of which is cited by form incorporated herein.

Technical field

The present disclosure relates to the technical field of bearings, and in particular to an axial bearing, a compressor having the axial bearing, and HVAC equipment having the axial bearing or the compressor.

Background technique

The core component of the refrigeration system is the refrigeration compressor. In the past, the lubricating medium of the sliding bearings in the refrigeration compressor was lubricating oil, but its viscosity is large, which will produce large friction power consumption at high speeds. In addition, there are lubricating oil If it exists, long-term use will affect the heat exchange effect of the heat exchanger and reduce the performance of the refrigeration system. Magnetic bearings have the advantages of low friction loss and good stability, but their costs are high and their advantages are not obvious in small and medium-sized compressor applications. Dynamic pressure gas bearings have the advantages of high speed, high efficiency and low friction loss, and are very suitable for small and medium-sized compressors. However, in related technologies, the manufacturing process of gas bearings is cumbersome, which is not conducive to its application.

Application content

The present disclosure aims to solve one of the technical problems in the related art, at least to a certain extent. To this end, one purpose of the present disclosure is to provide an axial bearing with a corrugated foil assembly, which can be manufactured and assembled separately, which facilitates production and processing.

Another object of the present disclosure is to provide a compressor including the aforementioned axial bearing.

Another object of the present disclosure is to provide an HVAC equipment, including the aforementioned axial bearing or the aforementioned compressor.

In order to achieve the above object, the present disclosure discloses an axial bearing. The axial bearing includes a mounting seat, a corrugated foil assembly, and a top foil assembly. The corrugated foil assembly includes a first positioning part and a corrugated foil, and a plurality of The corrugated foil is connected to the first positioning part and arranged along the circumferential direction of the first positioning part. The corrugated foil has corrugated sections; the top foil assembly includes a second positioning part and a top foil, a plurality of The top foil is connected to the second positioning part and is arranged along the circumferential direction of the second positioning part. A plurality of top foils are opposite to a plurality of corrugated foils. The mounting base and the corrugated foil and the top foil stack.

According to the axial bearing according to the embodiment of the present disclosure, the corrugated foil assembly and the top foil assembly can be separately manufactured and assembled by providing, Conducive to production and processing.

In addition, the axial bearing according to the above embodiments of the present disclosure may also have the following additional technical features:

In some examples of the present disclosure, the first positioning part is provided with a plurality of first escape holes, and the plurality of first escape holes are arranged along the circumferential direction of the first positioning part and penetrate the first In the positioning part, the plurality of corrugated foils are opposite to the plurality of first escape holes.

In some examples of the present disclosure, one side of the corrugated foil along the circumferential direction of the first positioning part is connected to one side of the corresponding first escape hole, and one side along the axial direction In the projection, the remaining sides of the corrugated foil are located inside the corresponding first escape holes.

In some examples of the present disclosure, there is a first gap between another side of the corrugated foil along the circumferential direction of the first positioning portion and the corresponding side of the first escape hole.

In some examples of the present disclosure, a positioning boss is provided on the mounting base, and the positioning boss passes through the first gap and is welded to the top foil assembly.

In some examples of the present disclosure, the first positioning part includes: a first outer ring, a first inner ring, and a plurality of first fixed edges, and the first inner ring is provided inside the first outer ring; The first fixed edges are respectively connected to the first inner ring and the first outer ring and are arranged at intervals along the circumferential direction of the first positioning portion. The corrugated foil is connected to the corresponding first fixed edge. connected.

In some examples of the present disclosure, a plurality of corrugated segments on the corrugated foil are arranged at intervals along the circumferential direction of the first positioning portion.

In some examples of the present disclosure, the corrugated segments on the corrugated foil extend along a predetermined direction, and the predetermined direction has an included angle of less than 90° with the radial direction of the first positioning portion.

In some examples of the present disclosure, an included angle between the predetermined direction and a radial direction of the first positioning portion is in a range of 0 to 45°.

In some examples of the present disclosure, a plurality of the corrugated foils are fixedly connected to the first positioning portion and then formed at once.

In some examples of the present disclosure, a plurality of the corrugated foils are integrally formed with the first positioning portion.

In some examples of the present disclosure, the corrugated foil is provided with a notch, the notch penetrates the corrugated foil along the thickness direction of the corrugated foil, and the notch cuts at least one part of the corrugated foil. A corrugated segment.

In some examples of the present disclosure, a plurality of corrugated segments on the corrugated foil are arranged at intervals along the circumference of the axial bearing, and the notches extend along the arrangement direction of the corrugated segments.

In some examples of the present disclosure, the corrugated foil is provided with a notch on one side in the circumferential direction of the axial bearing, and the notch is connected with the notch.

In some examples of the present disclosure, the notch divides at least one of the corrugated segments into a plurality of segments spaced along an extension direction of the corrugated segment.

In some examples of the present disclosure, the overall width dimension of the notch in the corrugated foil is the same as the axial axis of the corrugated foil. The ratio of the bearing's radial dimensions is in the range of 5% to 25%.

In some examples of the present disclosure, the ratio of the area of the notched portion of the corrugated foil to the total area of the corrugated foil is in the range of 30% to 40%.

In some examples of the present disclosure, the notch penetrates the fixed end of the corrugated foil along the circumferential direction of the first positioning portion and has a predetermined distance from the movable end of the corrugated foil.

In some examples of the present disclosure, the fixed end of the corrugated foil is connected to the first positioning part along both radial sides of the first positioning part, and the fixed end of the corrugated foil is connected to the first positioning part along the radial sides of the first positioning part. A radially central region of the positioning portion is spaced apart from the first positioning portion.

In some examples of the present disclosure, the notch divides the fixed end of the corrugated foil into a plurality of sections spaced apart along the radial direction.

In some examples of the present disclosure, the top foil assembly includes: a second positioning part, and a plurality of top foils. The plurality of top foils are connected to the second positioning part and are arranged along the circumference of the second positioning part. Arranged in a direction, a plurality of top foils correspond to a plurality of corrugated foils and are stacked.

In some examples of the present disclosure, the second positioning part is provided with a plurality of second escape holes, and the plurality of second escape holes are arranged along the circumferential direction of the second positioning part and penetrate the second positioning part. In a positioning portion, the plurality of top foils are opposite to the plurality of second escape holes.

In some examples of the present disclosure, one side of the top foil along the circumferential direction of the second positioning part is connected to one side of the corresponding second escape hole, and one side along the axial direction The remaining sides of the top foil in the projection are located inside the corresponding second escape holes.

In some examples of the present disclosure, there is a second gap between another side of the top foil along the circumferential direction of the second positioning portion and the corresponding side of the second escape hole.

In some examples of the present disclosure, the second gap is opposite a corresponding portion of the corrugated foil.

In some examples of the present disclosure, the second gap is opposite the fixed end of the corresponding corrugated foil.

In some examples of the present disclosure, the corrugated foil is provided with a notch, and the second gap is opposite to the notch.

In some examples of the present disclosure, the second positioning part includes: a second outer ring, a second inner ring, and a second fixed edge, and the second inner ring is provided inside the second outer ring; The second fixed edges are respectively connected to the second inner ring and the second outer ring, and the top foil is connected to the corresponding second fixed edges.

In some examples of the present disclosure, a plurality of the top foils are integrally formed with the second positioning portion.

In some examples of the present disclosure, a first positioning hole is provided on the periphery of the mounting base, a second positioning hole is provided on the periphery of the corrugated foil component, and a third positioning hole is provided on the periphery of the top foil component, The first positioning hole, the second positioning hole and the third positioning hole are opposite to each other.

In some examples of the present disclosure, the axial bearing further includes a thrust plate that is stacked on opposite sides of the thrust plate. There is the top foil assembly, the corrugated foil assembly, and the mounting base.

In some examples of the present disclosure, a plurality of the corrugated foils and the first positioning portion are made of the same foil.

According to the compressor according to the embodiment of the present disclosure, by applying the aforementioned axial bearing, the manufacturing cost of the compressor can be reduced.

The HVAC equipment according to the embodiment of the present disclosure includes the aforementioned axial bearing; or includes the aforementioned compressor.

Additional aspects and advantages of the disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the disclosure.

Description of the drawings

In order to explain the embodiments of the present disclosure or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only These are some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without exerting creative efforts.

Figure 1 is a partial structural schematic diagram of an axial bearing in some embodiments of the present disclosure (showing the mounting seat, corrugated foil assembly and top foil assembly).

Figure 2 is a schematic structural diagram of a corrugated foil assembly in some embodiments of the present disclosure.

Figure 3 is a schematic structural diagram of a top foil assembly in some embodiments of the present disclosure.

Reference signs:

1. Corrugated foil assembly; 106. Second positioning hole; 11. First positioning part; 101. First escape hole; 103. First gap; 111. First outer ring; 112. First inner ring; 113. A fixed edge; 12, corrugated foil; 122, corrugated section; 201, notch; 202, notch; 12a, fixed end; 12b, movable end; 2, top foil assembly; 21, second positioning part; 22, top foil ; 102. Second escape hole; 104. Second gap; 211. Second outer ring; 212. Second inner ring; 213. Second fixed edge; 107. Third positioning hole; 3. Mounting seat; 105. No. A certain positioning hole; 31. Positioning boss.

The realization of the purpose, functional features and advantages of the present disclosure will be further described with reference to the embodiments and the accompanying drawings.

Detailed ways

my country is the world's largest producer, consumer and exporter of refrigeration products, and refrigeration energy consumption accounts for 15% of total social energy consumption. During peak summer periods, the increase in cooling loads such as air conditioning not only places a heavy burden on the power grid, but also generates large amounts of greenhouse gas emissions. For this reason, promoting green and efficient refrigeration has become an important and urgent need for countries to promote energy conservation and emission reduction and cope with climate change.

The core component of the refrigeration system is the refrigeration compressor. In the past, the lubricating medium of the sliding bearings in the refrigeration compressor was lubricating oil, but its viscosity is large, which will produce large friction power consumption at high speeds. In addition, there are lubricating oil exist, use for a long time Using it will affect the heat exchange effect of the heat exchanger and reduce the performance of the refrigeration system. Magnetic bearings have the advantages of low friction loss and good stability, but their costs are high and their advantages are not obvious in small and medium-sized compressor applications. The dynamic pressure gas bearing has the advantages of high speed, high efficiency and low friction loss, and is very suitable for small and medium-sized compressors.

Therefore, the present disclosure proposes an axial bearing, which can improve the production and processing efficiency of the bearing and facilitate the application of dynamic pressure gas bearings.

Embodiments of the present disclosure are described in detail below, examples of which are illustrated 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 drawings are exemplary and intended to explain the present disclosure, but are not to be construed as limitations of the present disclosure.

1 to 3 , according to an axial bearing according to an embodiment of the present disclosure, the axial bearing includes a mounting seat 3, a corrugated foil assembly 1 and a top foil assembly 2. Specifically, the corrugated foil assembly 1 includes a first positioning portion 11 and a top foil assembly 2. The corrugated foil 12 is connected to the first positioning part 11. The corrugated foil 12 has a corrugated section 122. A plurality of corrugated foils 12 are connected to the first positioning part. The plurality of corrugated foils 12 are arranged along the circumferential direction of the first positioning part 11. In this way, the corrugated foil 12 is disposed on the first positioning portion to form the corrugated foil assembly 1, which can improve the structural stability of the installation of the corrugated foil 12. The corrugated foil assembly 1 is constructed as an independent component, which facilitates manufacturing and assembly. The top foil assembly 2 includes a second positioning part 21 and a top foil 22. A plurality of top foils 22 are connected to the second positioning part 21 and arranged along the circumferential direction of the second positioning part 21. The plurality of top foils 22 are connected with a plurality of corrugated foils. 12, the mounting base 3, the corrugated foil 12 and the top foil 22 are stacked. Therefore, the mounting base 3, the corrugated foil assembly 1 and the top foil assembly 2 can be manufactured separately and arranged in a stack to facilitate assembly.

According to the axial bearing of the embodiment of the present disclosure, the corrugated foil assembly 1 and the top foil assembly 2 can be manufactured and assembled separately by setting, which facilitates production and processing.

2 , in some embodiments of the present disclosure, the first positioning part 11 is provided with a plurality of first escape holes 101 , and the plurality of first escape holes 101 are arranged along the circumferential direction of the first positioning part 11 and penetrate the first positioning part 11 . A positioning portion 11 and a plurality of corrugated foils 12 face a plurality of first escape holes 101 . That is to say, the plurality of first escape holes 101 can be used to install a plurality of corrugated foils 12 so that the corrugated foils 12 can be disposed on the first positioning portion 11 to form the corrugated foil assembly 1 . The first escape hole 101 can be directly constructed on the first positioning portion 11 , which is beneficial to simplifying the structure of the corrugated foil assembly 1 .

In some embodiments of the present disclosure, one side of the corrugated foil 12 along the circumferential direction of the first positioning portion 11 is connected to one side of the corresponding first escape hole 101 , and in the projection along the axial direction, the corrugated foil 12 is connected to one side of the corresponding first escape hole 101 . The remaining sides of 12 are located inside the corresponding first escape holes 101 . Specifically, one side of the corrugated foil 12 is connected to one side of the first escape hole 101, and the other sides of the corrugated foil 12 are located in the first escape hole 101. In this way, the corrugated foil 12 can be movably connected to the first escape hole 101. On a certain positioning portion 11, it is helpful to improve the functionality of the corrugated foil 12. For example, when the corrugated foil 12 is stressed, it can extend along the remaining sides of the axially upward projection of the corrugated foil 12 .

Specifically, with reference to Figures 1 and 2, there is a first gap 103 between the other side of the corrugated foil 12 along the circumferential direction of the first positioning portion 11 and the corresponding side of the first escape hole 101. The first gap 103 can provide deformation space for the corrugated foil 12 to deform under force. In addition, the first gap 103 can also facilitate the connection of the corrugated foil assembly 1 with the mounting base 3 and the top foil assembly 2 .

1 , in some embodiments of the present disclosure, a positioning boss 31 is provided on the mounting base 3. The positioning boss 31 passes through the first gap 103 and is welded to the top foil assembly 2, which is beneficial to reducing the volume of the axial bearing. And it is helpful to improve the connection stability. Specifically, when the positioning boss 31 passes through the first gap 103, the mounting base 3 and the corrugated foil assembly 1 can be connected. The positioning boss 31 is welded to the top foil assembly 2, thereby realizing the mounting base 3, the corrugated foil assembly 1 and the top foil assembly 2. The stacked connection of the top foil components 2 is conducive to improving connection stability and has a simple structure. In actual use, the corrugated foil 12 is axially limited by the positioning boss 31 and pressed and positioned axially by the top foil 22. Therefore, welding is not required and the welding process of the corrugated foil 12 can be reduced.

Specifically, the mounting base 3 can be provided with multiple positioning bosses 31 (the number of positioning bosses 31 is consistent with the number of axial bearing lobes). As shown in Figure 1, the positioning bosses 31 are used for welding the axial top foil. Component 2 is designed to avoid space with the corrugated foil 12. The positioning boss 31 can also be used to position the axial corrugated foil 12 and the top foil 22. The corrugated foil component 1 is directly fixed through the boss limiter without welding. The top foil component 2 is welded on the boss, and the consistency of the axial foil welding position is ensured through positioning to ensure the welding quality. At the same time, the welding process of the corrugated foil 12 is reduced. Compared with related technologies, the welding process is reduced by 50%.

In some embodiments of the present disclosure, the first positioning portion 11 is configured in a hollow annular shape, which is beneficial to improving the rotation effect of the bearing and facilitating manufacturing.

More specifically, with reference to FIG. 2 , in some embodiments of the present disclosure, the first positioning part 11 includes: a first outer ring 111 , a first inner ring 112 and a plurality of first fixed edges 113 . The first inner ring 112 Located inside the first outer ring 111, a ring-shaped structure is constructed. The first fixed edges 113 are respectively connected to the first inner ring 112 and the first outer ring 111 and are arranged at intervals along the circumferential direction of the first positioning portion 11 . That is, the first fixed edges 113 separate a plurality of first escapes on the annular structure. The hole 101, and further, the corrugated foil 12 is connected to the corresponding first fixed edge 113 to be fixedly connected to the first positioning part 11. Among them, the first positioning part 11 may be an integral structure to facilitate manufacturing. During assembly, multiple corrugated foils 12 can be installed on the first positioning portion 11 .

In some embodiments of the present disclosure, the plurality of corrugated segments 122 on the corrugated foil 12 are arranged at intervals along the circumferential direction of the first positioning portion 11 . When used, the corrugated section 122 can deform in the circumferential direction when it is subjected to pressure, which is beneficial to supporting axial suspension and avoiding axial movement.

In some embodiments of the present disclosure, the corrugated section 122 on the corrugated foil 12 extends along a predetermined direction, and the predetermined direction has an included angle of less than 90° with the radial direction of the first positioning portion 11 , which is beneficial to improving the pressure bearing capacity of the corrugated foil 12 Effect. Specifically, the angle between the predetermined direction and the radial direction of the first positioning part 11 can be adjusted according to the extension space of the corrugated section 122 or actual usage. For example, the angle between the predetermined direction and the first positioning part 11 is 60°.

In some embodiments of the present disclosure, the angle between the predetermined direction and the radial direction of the first positioning portion 11 is in the range of 0 to 45°, so as to facilitate improving the axial support effect of the corrugated foil 12 .

In some embodiments of the present disclosure, multiple corrugated foils 12 are fixedly connected to the first positioning portion 11 and then formed at once, which is beneficial to improving the quality of the multiple corrugated foils 12 and improving the load-bearing capacity and durability of the corrugated foils 12 . Specifically, the plurality of corrugated foils 12 are installed on the first positioning part 11 and then integrally constructed, which can ensure that the heights of the plurality of corrugated foils 12 are consistent. The plurality of corrugated sections 122 The height of the protrusions is consistent, and the gaps between the plurality of corrugated foils 12 and the first positioning portion 11 are consistent, thereby ensuring that the loads of the multiple corrugated foils 12 are consistent, which is beneficial to improving the overall bearing capacity of the bearing. Therefore, when multiple axial bearings are used, they are consistent, which is beneficial to improving bearing performance.

Alternatively, in some embodiments of the present disclosure, the plurality of corrugated foils 12 and the first positioning portion 11 are integrally formed, that is, the corrugated foil assembly 1 has an integrated structure, which facilitates manufacturing.

In some embodiments of the application, the plurality of corrugated foils 12 and the first positioning portion 11 can be made of the same foil, which facilitates manufacturing and ensures the consistency of the plurality of corrugated foils 12 . For example, multiple corrugated foils 12 may be directly produced on the same foil; or multiple foils may be cut from the same foil and connected to the first positioning part 11. The sheet is integrally formed to form a plurality of corrugated foils 12 and the like.

Optionally, the top foil assembly 2 or the mounting base 3 can also be an integral structure and be integrally formed during manufacturing.

With reference to Figure 2, the corrugated foil assembly 1 according to some embodiments of the present disclosure includes: a first outer ring 111, a corrugated foil 12, a first escape hole 101, a first fixed edge 113, a first inner ring 112 and a second positioning hole. 106. Among them, the first outer ring 111, the first inner ring 112 and the first fixed edge 113 construct an integrated first positioning part 11. The corrugated foil 12 can have eight pieces, and each of the eight corrugated foils 12 has a fixed end 12a and a movable end. 12b, the fixed end 12a is connected to the first positioning part 11 to form a whole. During manufacturing, multiple corrugated foils 12 can be integrally formed to achieve consistent heights of the corrugated foils 12 .

2 , in some embodiments of the present disclosure, the corrugated foil 12 is provided with a notch 201 , the notch 201 penetrates the corrugated foil 12 along the thickness direction of the corrugated foil 12 , and the notch 201 cuts at least one part of the corrugated foil 12 A corrugated section 122 can increase the air intake volume of the axial bearing, improve the stability of the air film, and thereby improve the load-bearing capacity of the axial bearing. Specifically, the notch 201 cuts the corrugated section 122 on the corrugated foil 12. When the axial bearing load is large, the corrugated section 122 of the corrugated foil 12 at the notch 201 is prone to deformation and the deformation amount is large, which can increase air intake. When the load in the area of the corrugated foil 12 away from the notch 201 is large, the deformation of the corrugated section 122 is relatively small, which can reduce the amount of leakage after gas enters and improve the bearing capacity of the axial bearing. Specifically, the size of the notch 201 can be adjusted according to the actual situation, or the number of corrugated sections 122 cut by the notch 201 can be increased to increase the air intake amount.

When the bearing is working, the gas is brought from the wedge-shaped area by the thrust plate between the top foil 22 and the thrust plate, forming a high-pressure air film. The notch 201 cuts at least one corrugated section 122 on the corrugated foil 12, which can effectively reduce the corrugated foil. 12 The stiffness of the corrugated foil 12 in the area where the notch 201 is located. When the bearing load is large, the deformation of the corrugated section 122 of the corrugated foil 12 increases, which is beneficial to increasing the air intake in the wedge-shaped area between the top foil assembly 2 and the thrust plate, and the deformation of other areas of the corrugated foil 12 is smaller than that of the notch 201. It can reduce air leakage and help form a stable air film.

In some embodiments of the present disclosure, the plurality of corrugated sections 122 on the corrugated foil 12 are arranged at intervals along the circumference of the axial bearing, so that there is a deformation space between the plurality of corrugated sections 122. When the corrugated sections 122 are under pressure, It can be deformed in the circumferential direction, which is beneficial to support axial suspension and avoid axial movement. The slot 201 extends along the arrangement direction of the corrugated segments 122, so that the slot 201 can cut multiple corrugated segments 122 to increase the air intake.

In some embodiments of the present disclosure, the extending direction of the notch 201 and the extending direction of the corrugated section 122 have an angle greater than 0°. angle. That is to say, the extension direction of the notch 201 is different from the extension direction of the corrugated section 122. In this way, when the bearing moves, the deformation of the corrugated section 122 can enlarge the opening of the notch 201, which facilitates the suction of gas and increases the air intake.

In some embodiments of the present disclosure, the notches 201 include a plurality of them spaced apart along the extension direction of the corrugated section 122, thereby further increasing the amount of air intake and improving the bearing load-bearing capacity.

In some embodiments of the present disclosure, the corrugated foil 12 is provided with a notch 202 on one side in the circumferential direction of the axial bearing, and the notch 201 is connected with the notch 202, which is beneficial to increasing the air intake amount. Specifically, the notch 202 can separate the corrugated foil 12 from the first positioning part 11, and the notch 201 is connected with the notch 202. On the one hand, the opening of the notch 201 can be increased; on the other hand, the extension of the corrugated section 122 in the circumferential direction can be increased. The space is conducive to the deformation of the corrugated section 122 and increases the amount of air intake in the wedge-shaped area of the top foil assembly 2.

Of course, the notch 202 may not be provided, and the plurality of notches 201 may be directly connected to one side of the first positioning part 11 , or the plurality of notches 201 may be provided on the corrugated foil 12 and spaced apart from the first positioning part 11 , etc. , the present disclosure is not limited thereto.

In some embodiments of the present disclosure, the notch 201 divides at least one corrugated section 122 into multiple sections spaced along the extension direction of the corrugated section 122 .

In some embodiments of the present disclosure, the ratio of the total width dimension of the notch 201 in the corrugated foil 12 to the dimension of the corrugated foil 12 in the radial direction of the axial bearing is in the range of 5% to 25%. In this way, the notch 201 can effectively reduce the stiffness of the middle part of the notch 201 area of the corrugated foil 12. When the bearing load is large, the deformation increases from the radial notch 201 area of the corrugated foil 12, which is beneficial to increasing the wedge-shaped area of the top foil 22. The amount of air intake, and the deformation around the corrugated foil 12 (except for the radial groove area and the middle circumferential groove area) is smaller than the middle deformation, which can reduce the deformation in the outer circumferential direction of the top foil 22 at the corresponding position, thereby reducing the amount of gas leakage at the outer peripheral position. , increase the average gas pressure of the bearing, thereby improving the overall bearing capacity of the bearing.

In practical applications, the ratio of the total width of the notch 201 in the corrugated foil 12 to the size of the corrugated foil 12 in the radial direction of the axial bearing can be set to 10% or 20%, etc. Of course, according to actual application conditions, the ratio of the total width of the notches 201 in the corrugated foil 12 to the size of the corrugated foil 12 in the radial direction of the axial bearing can also be set to 5% or 30%, etc., and the present disclosure is not limited thereto. .

In some embodiments of the present disclosure, the ratio of the area of the portion with the notches 201 on the corrugated foil 12 to the total area of the corrugated foil 12 is in the range of 30% to 40%, which is beneficial to ensuring the bearing capacity of the corrugated foil 12, and The structural stability of the corrugated foil 12 can be ensured. For example, the ratio of the area of the portion of the corrugated foil 12 with the notch 201 to the total area of the corrugated foil 12 is 35%, etc. Of course, the ratio of the area of the portion of the corrugated foil 12 with the notches 201 to the total area of the corrugated foil 12 can also be set to less than 30% or greater than 40% according to the actual situation.

2 , in some embodiments of the present disclosure, the notch 201 penetrates the fixed end 12 a of the corrugated foil 12 along the circumferential direction of the first positioning portion 11 and has a predetermined distance from the movable end 12 b of the corrugated foil 12 . Specifically, the fixed end 12a of the corrugated foil 12 has high stability, and the deformation of the corrugated section 122 of the corrugated foil 12 close to the movable end 12b can be greater than the deformation of the fixed end 12a. Therefore, the notch 201 connects the axial penetration of the first positioning part. The fixed end 12a of the corrugated foil 12 is kept at a certain distance from the movable end 12b of the corrugated foil 12, which can increase the deformation of the fixed end 12a of the corrugated foil 12, thereby helping to maintain the dynamic balance of the corrugated foil assembly 1. In addition, when the bearing is in use, the deformation of the fixed end 12a of the corrugated foil 12 increases, and the air intake volume increases. The deformation of the movable end 12b of the corrugated foil 12 is small, and the gas flow is small, which can reduce air leakage and help form a stable air supply. membrane.

In some embodiments of the present disclosure, the fixed end 12 a of the corrugated foil 12 is connected to the first positioning part 11 along both radial sides thereof, so as to connect the corrugated foil 12 to the first positioning part 11 . Furthermore, the fixed end 12a of the corrugated foil 12 is spaced apart from the first positioning portion along the radial middle area of the first positioning portion 11, which can increase the deformation amount of the corrugated section 122 of the corrugated foil 12 in the middle area of the fixed end 12a, which is beneficial to improving the Air intake volume in the central area.

Referring to Figure 2, in some embodiments of the present disclosure, the notch 201 divides the fixed end 12a of the corrugated foil 12 into multiple sections spaced apart in the radial direction, which is beneficial to increasing the amount of air intake, and can disperse the air intake position, which is beneficial to maintaining the wave. Dynamic equilibrium of foil 12 deformation.

Referring to Figure 2, according to the corrugated foil assembly 1 according to some embodiments of the present disclosure, each corrugated foil 12 has a radial notch 201 and an axial notch 202 starting from the connection part between the fixed end 12a and the corrugated foil 12. The number of notches 201 in the direction can be greater than or equal to 4, and the area of the notches 201 on the corrugated foil 12 accounts for 30%-40% of the entire area of the corrugated foil 12 . Specifically, in practical applications, the notch 201 can effectively reduce the stiffness of the middle part of the notch 201 area of the corrugated foil 12. When the bearing load is large, the deformation increases from the radial slotted part, increasing the wedge shape of the top foil 22. The air intake volume of the area, and the deformation of the three circumferential directions of the corrugated foil 12 (except for the radial grooved part and the middle circumferential grooved part) is smaller than the middle deformation, which can reduce the deformation of the top foil 22 in the corresponding three circumferential directions, thereby reducing the three-dimensional deformation. The amount of gas leakage at the circumferential position increases the average gas pressure of each bearing, thereby improving the overall bearing capacity of each bearing; among them, the first gap 103 can avoid the positioning boss 31 on the mounting base 3, and the corrugated foil 12 passes through the positioning The boss 31 is axially limited and is pressed and positioned axially by the top foil 22, so welding is not required and the welding process of the corrugated foil 12 can be reduced. By having a radial notch 201 and an axial notch 202 in the corrugated foil 12 corresponding to the wedge-shaped area, the stiffness of the bearing air inlet position (wedge-shaped area) is small, and the stiffness of the other three weeks is large. Under large loads, This technical solution increases the air intake in the wedge-shaped area of each bearing, reduces gas leakage in the other three weeks, thereby increasing the air film pressure between each bearing and the thrust plate, and increasing the load-bearing capacity of each bearing by more than 30%.

3 , in some embodiments of the present disclosure, the top foil assembly 2 includes: a second positioning part 21 and a plurality of top foils 22 . The plurality of top foils 22 are connected to the second positioning part 21 and are arranged along the second positioning part. 21 circumferential arrangement. Specifically, the top foil 22 is disposed on the second positioning portion 21 to form the top foil assembly 2, which can improve the structural stability of the installation of the top foil 22. The top foil assembly 2 is constructed as an independent component to facilitate manufacturing and assembly. Further, the plurality of top foils 22 corresponds to and is stacked on the plurality of corrugated foils 12. The plurality of corrugated foils 12 can provide support for the plurality of top foils 22, which is beneficial to improving operational stability and facilitating assembly and maintenance.

In some embodiments of the present disclosure, the second positioning part 21 is provided with a plurality of second escape holes 102 , and the plurality of second escape holes 102 are arranged along the circumferential direction of the second positioning part 21 and penetrate the second positioning part 21 , the plurality of top foils 22 are opposite to the plurality of second escape holes 102 . In other words, the plurality of second escape holes 102 can be used to install a plurality of top foils 22 to facilitate connecting the top foils 22 to the second positioning portion 21 . The second escape hole 102 can be directly constructed on the second positioning portion 21 , which is beneficial to simplifying the structure of the top foil assembly 2 .

In some embodiments of the present disclosure, one side of the top foil 22 along the circumferential direction of the second positioning portion 21 is in contact with the corresponding third positioning portion 21 . One side of the two escape holes 102 is connected, and the other sides of the top foil 22 are located inside the corresponding second escape hole 102 in the axial projection. Specifically, one side of the top foil 22 is connected to one side of the second escape hole 102, and the remaining sides of the top foil 22 are located in the second escape hole 102. In this way, the top foil 22 can be movably connected to the second escape hole 102. The two positioning parts 21 are conducive to improving the functionality of the top foil 22. For example, the top foil 22 may, when stressed, extend along the remaining sides of the axially upward projection of the corrugated foil 12 .

In some embodiments of the present disclosure, there is a second gap 104 between the other side of the top foil 22 along the circumferential direction of the second positioning portion 21 and the corresponding side of the second escape hole 102 . The second gap 104 can provide a deformation space for the top foil 22 to deform under force.

In some embodiments of the present disclosure, the second gap 104 is opposite to a corresponding part of the corrugated foil 12 , whereby the second gap 104 can facilitate the connection of the top foil assembly 2 with the corrugated foil assembly 1 or the mounting base 3 .

Specifically, the second gap 104 is opposite to the fixed end 12a of the corresponding corrugated foil 12, which is conducive to the gas entering from the second gap 104 into the wedge-shaped area in the top foil assembly 2 and the thrust plate, which is conducive to increasing the air intake volume to improve the bearing. Carrying capacity.

In some embodiments of the present disclosure, the corrugated foil 12 is provided with a notch 201, and the second gap 104 is opposite to the notch 201. The notch 201 can increase the deformation of the corrugated foil 12, thereby facilitating air intake. The notch 201 is opposite to the second gap 104, which facilitates the gas entering the corrugated foil assembly 1 to directly enter the top foil assembly 2, thereby avoiding energy loss and improving the axial bearing. operating effect.

3 , in some embodiments of the present disclosure, the second positioning part 21 includes: a second outer ring 211 , a second inner ring 212 , and a second fixed edge 213 , and the second inner ring 212 is provided on the second outer ring 211 inside to create a ring structure. The second fixed edges 213 are respectively connected to the second inner ring 212 and the second outer ring 211. The second fixed edges 213 can be arranged at intervals along the circumferential direction, that is, the second fixed edges 213 separate a plurality of second escape holes on the annular structure. 102. Further, the top foil 22 is connected to the corresponding second fixed edge 213 to be fixedly connected to the second positioning part 21. The second positioning part 21 may be an integral structure to facilitate manufacturing. During assembly, multiple top foils 22 can be installed on the second positioning portion 21 .

In some embodiments of the present disclosure, the plurality of top foils 22 and the second positioning portion 21 are integrally formed to facilitate improving the quality of the plurality of top foils 22 and improving the load-bearing capacity and durability of the top foils 22 . Specifically, the plurality of top foils 22 can be integrally constructed after being installed on the second positioning portion 21 , or the plurality of top foils 22 can be integrally constructed with the second positioning portion 21 , which can ensure that the plurality of top foils 22 and the second positioning portion are integrally constructed. The gaps 21 are consistent, thereby ensuring consistent loads on multiple top foils 22, which is conducive to improving the overall bearing capacity of the bearing. Based on the above, the gaps and loads of the plurality of corrugated foils 12 and the first positioning part 11 are consistent, the plurality of corrugated foils 12 cooperate with the plurality of top foils 22, the corrugated foils 12 and the top foils 22 are arranged oppositely, and the plurality of top foils 22 and the plurality of top foils 22 are arranged oppositely. The consistency of each top foil 22 makes the cooperation between the corrugated foil 12 and the top foil 22 stable, thereby improving the structural stability and improving the load-bearing capacity. Therefore, when multiple axial bearings are used, they have consistency, which is beneficial to improving bearing performance.

Specifically, with reference to Figure 3, according to the top foil assembly 2 of some embodiments of the present disclosure, the top foil assembly 2 includes: a second outer ring 211, a second inner ring 212, a second fixed edge 213, a plurality of top foils 22 and The third positioning hole 107. Among them, the second outer ring 211, the second inner ring 212 and the second fixed edge 213 construct a second escape hole 102, and the top foil 22 is connected to the second escape hole 102. Within 102, the top foil assembly 2 is formed. The top foil assembly 2 can be an integrated structure. During manufacturing, the top foil assembly 22 is pressed and formed through an integrated top foil 22 forming mold to achieve the same height of eight top foils 22. With the corrugated foil 12 having the same height, each piece can be made The clearance between the bearing top foil 22 and the thrust plate is consistent, and the load of each bearing is consistent, so that the overall bearing capacity of the bearing is improved. When used, the slope of the top foil 22 and the thrust plate form a wedge-shaped area. When the thrust plate rotates at high speed, the airflow is driven from the wedge-shaped area into the top foil 22. Through the compression of the wedge-shaped area, high-pressure gas is formed, which can realize the rotor suspension. More specifically, the welding position of the top foil assembly 2 and the mounting base 3 are welded and fixed through the positioning boss 31. The third positioning hole 107 realizes the second positioning hole 106 of the top foil assembly 2, the corrugated foil assembly 1 and the mounting base 3. A certain positioning hole 105 jointly realizes the positioning and locking of the axial bearing.

According to the axial bearings of some embodiments of the present disclosure, by constructing an integrated corrugated foil assembly 1 and an integrated top foil assembly 2, the heights between the petal bearings are consistent, thereby achieving consistent heights with the thrust plates, During operation, the load between each bearing is consistent, thereby achieving the maximum overall bearing capacity of the axial bearing. In related technologies, bearings have a large height difference between each petal bearing, and the load between each petal bearing is inconsistent. When the individual bearing capacity has reached the limit, some have a smaller bearing capacity due to larger gaps, so the axis bearings The overall load-bearing capacity is small, and sometimes only one bearing is working at the maximum load. When the load continues to increase, the 22 top foils with small gaps will wear out, leading to rapid bearing failure.

Therefore, the present disclosure can realize the one-time molding of the corrugated foil 12 and the top foil 22 by providing an integrated corrugated foil assembly 1 and an integrated top foil assembly 2. The length and process of the molding process are reduced by about 85% compared with the solution of the related art, and In the present disclosure, the corrugated foil 12 does not need to be welded through axial and axial limiting, and the welding time and process are reduced by about 50% compared with solutions in related technologies.

In some embodiments of the present disclosure, the first positioning hole 105 is provided on the periphery of the mounting base 3 , the second positioning hole 106 is provided on the periphery of the corrugated foil assembly 1 , and the third positioning hole 107 is provided on the periphery of the top foil assembly 2 , the first positioning hole 105, the second positioning hole 106 and the third positioning hole 107 are opposite. Specifically, the first positioning hole 105, the second positioning hole 106 and the third positioning hole 107 are connected, and the positioning member can pass through the positioning holes to connect the mounting base 3, the corrugated foil assembly 1 and the top foil assembly 2, that is, the first The positioning hole 105, the second positioning hole 106 and the third positioning hole 107 cooperate to realize the positioning and locking of the axial bearing. Among them, multiple first positioning holes 105, second positioning holes 106 and third positioning holes 107 are respectively provided at intervals along the periphery of the mounting base 3, the corrugated foil assembly 1 and the top foil assembly 2 to improve the positioning effect.

In some embodiments of the present disclosure, the axial bearing further includes a thrust plate, and the top foil assembly 2, the corrugated foil assembly 1 and the mounting seat 3 are laminated on opposite sides of the thrust plate. Specifically, when the thrust plate rotates at high speed, gas is brought into the wedge-shaped area between the thrust plate and the top foil assembly 2, forming a high-pressure air film that can suspend the thrust plate axially and help maintain the balance of the thrust plate.

In some embodiments of the present disclosure, the top foil assembly 2, the corrugated foil assembly 1 and the mounting seat 3 are symmetrically arranged on opposite sides of the thrust plate, which is beneficial to improving the balance of the thrust plate and improving the stability of the axial bearing during operation. Balanced state.

Specifically, the axial bearing according to some embodiments of the present disclosure has a front mounting seat 3, a front wave foil assembly 1 and a front top foil assembly 2 on the opposite sides of the thrust plate in the front axial direction; and a rear top foil assembly 2 in the rear axial direction. It consists of foil assembly 2, rear wave foil assembly 1 and rear mounting base 3. The front axial bearing and the rear axial bearing are symmetrically distributed on both sides of the thrust plate.

Specifically, the mounting base 3 according to some embodiments of the present disclosure includes a support plate, a first positioning hole 105 and a positioning boss 31, where the support plate is used to support the axial corrugated foil 12, and the first positioning hole 105 is used to support the axial corrugated foil 12. Bearing installation, positioning boss 31 is used for limiting the position of the axial corrugated foil 12 and for welding connection with the axial top foil assembly 2. More specifically, the mounting base 3 also has a bottom plate and a flange. The bottom plate is connected to the flange, and the flange extends in the axial direction. The bottom plate and the flange construct an accommodation space suitable for accommodating the corrugated foil assembly 1 and the top foil assembly 2. Therefore, when the positioning boss 31 passes through the corrugated foil assembly 1 and is welded to the top foil assembly 2, an integrated structure can be constructed.

According to the compressor according to the embodiment of the present disclosure, by applying the aforementioned axial bearing, the manufacturing cost of the compressor can be reduced and the operating stability of the compressor can be improved.

The present disclosure also provides an HVAC equipment, which includes the aforementioned axial bearing.

The present disclosure also provides an HVAC equipment, which includes the aforementioned compressor.

In the description of the present disclosure, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "front", "back", "top", "bottom" and "inner" ", "outer", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description. It is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore is not to be construed as a limitation on the present disclosure.

In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

In this disclosure, unless otherwise explicitly stated and limited, the terms "installation", "connection", "connection", "fixing" and other terms should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. , or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interactive relationship between two elements, unless otherwise specified restrictions. For those of ordinary skill in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "an example," "specific examples," or "some examples" or the like means that specific features are described in connection with the embodiment or example. , structures, materials, or features are included in at least one embodiment or example of the present disclosure. In this specification, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification unless they are inconsistent with each other.

The above are only preferred embodiments of the present disclosure, and are not intended to limit the patent scope of the present disclosure. Under the concept, equivalent structural transformations made using the contents of the disclosure description and drawings, or direct/indirect application in other related technical fields are included in the scope of patent protection of the disclosure.

Claims

An axial bearing, the axial bearing includes:

mounting base;

Corrugated foil assembly. The corrugated foil assembly includes a first positioning part and a corrugated foil. A plurality of corrugated foils are connected to the first positioning part and arranged along the circumferential direction of the first positioning part. The corrugated foils It has corrugated sections;

A top foil assembly, the top foil assembly includes a second positioning part and a top foil, a plurality of the top foils are connected to the second positioning part and are arranged along the circumferential direction of the second positioning part, a plurality of the top foils The top foil is opposite to a plurality of the corrugated foils, and the mounting base, the corrugated foils and the top foil are stacked.
The axial bearing according to claim 1, wherein the first positioning part is provided with a plurality of first escape holes, and the plurality of first escape holes are arranged along the circumferential direction of the first positioning part. Through the first positioning portion, a plurality of corrugated foils face a plurality of first escape holes.
The axial bearing according to claim 2, wherein one side of the corrugated foil in the circumferential direction of the first positioning part is connected to one side of the corresponding first escape hole, and is connected along the circumferential side of the first positioning part. In the projection along the axis, the remaining sides of the corrugated foil are located inside the corresponding first escape holes.
The axial bearing according to claim 3, wherein there is a first gap between the other side of the corrugated foil along the circumferential direction of the first positioning portion and the corresponding side of the first escape hole. .
The axial bearing according to claim 4, wherein a positioning boss is provided on the mounting seat, and the positioning boss passes through the first gap and is welded to the top foil assembly.
The axial bearing according to claim 1, wherein the first positioning portion includes:

first outer ring;

A first inner ring, the first inner ring is located inside the first outer ring;

A plurality of first fixed edges are respectively connected to the first inner ring and the first outer ring and are arranged at intervals along the circumferential direction of the first positioning portion. The corrugated foils are connected to corresponding The first fixed sides are connected.
The axial bearing according to claim 1, wherein a plurality of corrugated segments on the corrugated foil are arranged at intervals along the circumferential direction of the first positioning portion.
The axial bearing according to claim 7, wherein the corrugated section on the corrugated foil extends along a predetermined direction, and the predetermined direction has an included angle of less than 90° with the radial direction of the first positioning portion.
The axial bearing according to claim 8, wherein an angle between the predetermined direction and the radial direction of the first positioning portion is in the range of 0 to 45°.
The axial bearing according to claim 1, wherein a plurality of the corrugated foils are fixedly connected to the first positioning part and then formed at one time; or a plurality of the corrugated foils and the first positioning part are integrally formed.
The axial bearing according to claim 1, wherein the corrugated foil is provided with notches, and the notches are arranged along the corrugated foil. The thickness direction of the foil runs through the corrugated foil, and the notch cuts at least one corrugated section on the corrugated foil.
The axial bearing according to claim 11, wherein a plurality of corrugated segments on the corrugated foil are arranged at intervals along the circumference of the axial bearing, and the notches extend along the arrangement direction of the corrugated segments. .
The axial bearing according to claim 11 or 12, wherein the corrugated foil is provided with a notch on one side of the circumferential direction of the axial bearing, and the notch is connected with the notch;

And/or, the notch divides at least one of the corrugated segments into multiple segments spaced along the extension direction of the corrugated segment;

And/or, the ratio of the total width dimension of the notch in the corrugated foil to the dimension of the corrugated foil in the radial direction of the axial bearing is in the range of 5% to 25%;

And/or, the ratio of the area of the notched portion of the corrugated foil to the total area of the corrugated foil is in the range of 30% to 40%;

And/or, the notch penetrates the fixed end of the corrugated foil along the circumferential direction of the first positioning portion, and has a predetermined distance from the movable end of the corrugated foil.
The axial bearing according to claim 11, wherein the fixed end of the corrugated foil is connected to the first positioning part along both radial sides of the first positioning part, and the fixed end of the corrugated foil A middle region along the radial direction of the first positioning portion is spaced apart from the first positioning portion.
The axial bearing of claim 14, wherein the notch divides the fixed end of the corrugated foil into a plurality of sections spaced apart along the radial direction.
The axial bearing according to any one of claims 1 to 14, wherein the second positioning part is provided with a plurality of second relief holes, and the plurality of second relief holes are provided along the second positioning part. are arranged circumferentially and penetrate the second positioning portion, and a plurality of the top foils are opposite to a plurality of the second escape holes.
The axial bearing according to claim 16, wherein the top foil is connected to one side of the corresponding second relief hole along one circumferential side of the second positioning portion, and is connected along the circumferential side of the second positioning portion. In the projection upward of the axis, the remaining sides of the top foil are located inside the corresponding second escape holes.
The axial bearing according to claim 16, wherein there is a second gap between the other side of the top foil along the circumferential direction of the second positioning portion and the corresponding side of the second escape hole. .
The axial bearing of claim 18, wherein the second gap is opposite a portion of the corresponding corrugated foil.
The axial bearing according to claim 18, wherein the corrugated foil is provided with a notch, and the second gap is opposite to the notch.
The axial bearing according to claim 1, wherein the second positioning portion includes:

second outer ring;

a second inner ring, the second inner ring is located inside the second outer ring;

The second fixed edge is connected to the second inner ring and the second outer ring respectively, and the top foil is connected to the corresponding second fixed edge.
The axial bearing of claim 21, wherein a plurality of the top foils are integrally formed with the second positioning portion.
The axial bearing according to claim 1, wherein a first positioning hole is provided on the periphery of the mounting seat, a second positioning hole is provided on the periphery of the corrugated foil assembly, and a first positioning hole is provided on the periphery of the top foil assembly. The third positioning hole, the first positioning hole, the second positioning hole and the third positioning hole are opposite to each other.
The axial bearing according to claim 1, wherein the axial bearing further includes a thrust plate, and the top foil assembly, the corrugated foil assembly and the top foil assembly are respectively laminated on opposite sides of the thrust plate. Mount.
The axial bearing according to claim 1, wherein the plurality of corrugated foils and the first positioning portion are made of the same foil.
A compressor including the axial bearing according to any one of claims 1-25.
A heating and ventilation equipment, including the axial bearing according to any one of claims 1-25; or the compressor according to claim 26.