A gas foil radial bearing with energy absorption and buffering function

Abstract

This application proposes a gas foil radial bearing with energy-absorbing and buffering functions, comprising a bearing sleeve, a buffer structure, and an inner foil ring. The buffer structure is annular in structure, with the inner foil ring, buffer structure, and bearing sleeve arranged sequentially from the outside in. The buffer structure includes an energy-absorbing foil ring, each of which includes energy-absorbing units. Multiple energy-absorbing units are sequentially connected to form a circular ring structure, each of which is provided with a rubber strip. The technical solution of the present invention utilizes a buffer structure composed of an energy-absorbing foil ring and a filled rubber strip. This structure has sufficient stiffness and damping properties. While retaining the good stiffness and strength of the metal foil, it also incorporates high-temperature-resistant rubber, significantly improving the vibration damping and load-bearing capacity of the hydrodynamic gas bearing.

Description

Technical Field

[0001] The present application relates to the field of bearing technology, and in particular to a gas foil radial bearing with energy absorption and buffering functions. Background Art

[0002] Gas bearings utilize a gas film to support the bearing. They offer advantages such as zero friction, excellent stability, and low friction losses. Therefore, they hold broad application prospects in aerospace, high-speed turbines, cryogenics, air circulation, cryogenic refrigeration, and micro-gas turbines. Gas bearings are generally categorized as static and dynamic gas bearings. Static gas bearings require a complex external gas supply system to provide pressure, placing high demands on gas flow and pressure, and resulting in high costs. Dynamic gas bearings, on the other hand, support the load through a pressure film created by gas in the wedge-shaped space between the shaft and the inner surface of the bearing. When the film pressure balances the external load, the shaft and bearing are completely separated, and friction virtually disappears. This speed is known as the takeoff speed of the dynamic bearing. Under high-speed operating conditions, dynamic gas bearings achieve frictionless support, ensuring bearing stability. However, at low or zero speeds, dynamic bearings experience dry friction. Furthermore, at high speeds, friction-induced energy losses are significant, reducing the bearing's service life. When using gas bearings, attention must be paid to the stability of the rotor system, especially after reaching takeoff speed. The rotational heat of the air film generated by ultra-high-speed rotation can easily cause vibration, so vibration analysis and control are required.

[0003] Conventional air bearings use metal foil as an elastic support, but this foil is too rigid to achieve sufficient deformation. Consequently, conventional foil air bearings have poor damping properties and cannot provide sufficient damping to suppress bearing vibrations. Summary of the Invention

[0004] The present application aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, the purpose of this application is to propose an air foil radial bearing with energy-absorbing and buffering functions. By optimizing the elastic buffer structure of the aerodynamic bearing and adopting a structure that mixes buffering structural members with energy-absorbing and buffering functions with high-temperature resistant rubber strips, the bearing has a higher elastic buffering capacity. The advantages of the energy-absorbing structure's strong impact resistance and good seismic resistance, as well as the energy absorption properties provided by the rubber's material damping, are utilized to reduce the resonant amplitude of the mechanical structure, allowing the machine to quickly return to a stable state after a transient impact. This improves the stability and damping characteristics of the bearing, reduces vibration during the bearing's start-up and shutdown, and optimizes the bearing's dynamic performance. The rubber also helps reduce vibration noise.

[0006] To achieve the above objectives, the present application proposes a gas foil radial bearing with energy absorption and buffering functions, comprising a bearing sleeve, a buffer structure, and an inner foil ring. The buffer structure is annular in structure, and the inner foil ring, the buffer structure, and the bearing sleeve are sequentially arranged from the outside to the inside.

[0007] The buffer structure comprises an energy-absorbing foil ring, the energy-absorbing foil ring comprises an energy-absorbing unit, a plurality of the energy-absorbing units are sequentially connected to form a circular ring structure, and a rubber strip is provided in each of the energy-absorbing units;

[0008] The energy absorbing unit includes two oppositely arranged side foils and two oppositely arranged transverse foils, the two ends of the two transverse foils are respectively connected by the two side foils, so that an accommodation space is formed between the two side foils and the two transverse foils after being connected, and the rubber strip is inserted into the accommodation space, the side foils are in a V-shaped structure, and the bottom of the V-shaped structure is an arc, the arc bending directions of the two side foils are in opposite directions, and the arc bottoms of the side foils are pressed and connected with the rubber strip;

[0009] The middle parts of the two transverse foils are in an arc-shaped structure, and the bottoms of the arc-shaped structures of the two transverse foils are bent in two opposite directions. The bottoms of the arc-shaped structures in the middle parts of the transverse foils are tightly connected to the rubber body.

[0010] Furthermore, the rubber strip is an elliptical cylinder.

[0011] Furthermore, the two side foils have the same structure, and the two arc side foils are symmetrically arranged with respect to the rubber strip;

[0012] The two transverse foils have the same structure and are symmetrically arranged with respect to the rubber strip;

[0013] The side foils are connected to the short arc surface of the ellipse of the rubber strip, and the transverse foils are connected to the long arc surface of the ellipse of the rubber body.

[0014] Furthermore, the distance between the two ends of the V-shaped structure of the side foil is h, and the distance between the two ends of the transverse foil is w, where h=4.5 mm-6 mm and w=9.0 mm-11.5 mm.

[0015] Furthermore, the width b of the transverse foil is 0.8 mm-1.0 mm.

[0016] Furthermore, the inner angle α between the transverse foil and the side foil is 45°-60°.

[0017] Furthermore, two adjacent energy absorbing units are connected via the side foils, so that the connection of the two energy absorbing units is achieved by connecting the two ends of the adjacent side wall pieces of the two energy absorbing units, and the two adjacent energy absorbing units are integrally formed.

[0018] Furthermore, the rubber strip is bonded to the side foil and the transverse foil by a high temperature resistant adhesive.

[0019] Furthermore, a positioning groove is provided on the inner wall of the annular ring of the bearing sleeve, the energy absorbing unit is located in the positioning groove, the annular structure of the energy absorbing unit is provided with a notch, and the inner foil ring is also provided with a notch.

[0020] Furthermore, the energy absorbing unit is connected to the inner foil ring, and the contact surface between the energy absorbing unit and the inner foil ring is sprayed with a polytetrachloroethylene anti-wear coating, and the rubber strip is silicone rubber.

[0021] Additional aspects and advantages of the present application will be set forth in part in, and in part will be apparent from, the description which follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0023] Figure 1 This is a schematic diagram of the structure of a gas foil radial bearing with energy absorption and buffering functions;

[0024] Figure 2 yes Figure 1 A magnified view of the local structure;

[0025] Figure 3 It is a schematic diagram of the structure of the energy absorption unit of this application;

[0026] Figure 4 Schematic diagram of the structure of the energy absorbing unit and the force-bearing process of the rubber strip in this application;

[0027] In the figure: 1. Bearing sleeve; 2. Buffer structure; 3. Inner foil ring; 4. Energy-absorbing foil ring; 5. Energy-absorbing unit; 6. Rubber strip; 7. Side foil; 8. Horizontal foil; 9. Accommodation space. DETAILED DESCRIPTION

[0028] The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present application and are not to be construed as limiting the present application. On the contrary, the embodiments of the present application include all variations, modifications, and equivalents that fall within the spirit and scope of the appended claims.

[0029] Figure 1 This is a schematic structural diagram of a gas foil radial bearing with energy absorption and buffering functions proposed in one embodiment of the present application.

[0030] like Figure 1-4 As shown, a gas foil radial bearing with energy absorption and buffering function includes a bearing sleeve 1, a buffering structure 2 and an inner foil ring 3. The buffering structure 2 is an annular structure, and the inner foil ring 3, the buffering structure 2 and the bearing sleeve 1 are sequentially arranged from the outside to the inside.

[0031] It can be understood that since the bearing sleeve 1, the buffer structure 2 and the inner foil ring 3 are all circular structures, the three are nested in layers, and the inner foil ring 3, the buffer structure 2 and the bearing sleeve 1 are arranged in sequence from the outside to the inside.

[0032] Furthermore, the annular structures of the bearing sleeve 1 , the buffer structure 2 and the inner foil ring 3 are coaxially arranged.

[0033] In addition, the buffer structure 2 includes an energy-absorbing foil ring 4 , which includes energy-absorbing units 5 . A plurality of energy-absorbing units 5 are sequentially connected to form a circular ring structure, and a rubber strip 6 is provided in each energy-absorbing unit 5 .

[0034] That is to say, multiple energy absorbing units 5 are connected to form an energy absorbing foil ring 4. Since a rubber strip 6 is provided in each energy absorbing unit 5, multiple rubber bodies 6 are spaced apart to achieve the interval arrangement. A buffer support is formed between the multiple evenly spaced rubber strips 6 and the energy absorbing unit 5, and the buffer structure 2 is annular and connected to the inside of the bearing sleeve 1. Fixation and protection are achieved through the buffering and pressing effects of the buffer functional structure 2.

[0035] It should also be noted that the energy absorption unit 5 includes two oppositely arranged side foils 7 and two oppositely arranged transverse foils 8. The two ends of the two transverse foils 8 are respectively connected by two side foils 7 to form a receiving space 9 after the two side foils 7 and the two transverse foils 8 are connected. The rubber strip 6 is inserted into the receiving space 9. The side foils 7 have a V-shaped structure, and the bottom of the V-shaped structure is arc-shaped. The arc-shaped bending directions of the two side foils 7 face in opposite directions. The arc-shaped bottom of the side foil 7 is pressed tightly against the rubber strip 6, and the middle part of the two transverse foils 8 has an arc-shaped structure. The arc-shaped bottom of the two transverse foils 8 has a bending direction in opposite directions. The arc-shaped bottom of the middle part of the transverse foil 8 is pressed tightly against the rubber body 6.

[0036] It can be understood that each energy absorbing unit 5 is connected by two side foils 7 and two transverse foils 8 to form a receiving space 9. Since the side foils 7 are set to a V-shaped structure, and the bottom of the V-shaped structure is arc-shaped and the middle parts of the two transverse foils 8 are also set to an arc-shaped structure, the surrounding side walls of the enclosed receiving space 9 are arc-shaped structures. The arc-shaped structure is pressed tightly with the rubber strip 6, so that at the initial stage of contact pressure, the initial main deformation of the buffer structure 2 is generated by the energy absorbing unit 5. The energy absorbing unit 5 is squeezed so that the space between the two side foils 7 of the energy absorbing unit 5 is The gap between the two horizontal foils 8 becomes smaller and smaller, causing the pressure to be transmitted to the rubber strip 6 until the rubber strip 6 completely absorbs the pressure and vibration. Compared with the traditional pure metal dynamic pressure gas bearing, this structure adds the flexible material of rubber to enhance the buffering capacity. At the same time, the energy-absorbing foil 4 makes this elastic support structure have sufficient rigidity and damping, and has good sound insulation and heat dissipation performance, and has excellent energy absorption characteristics. The elastic support structure 2 made of the above materials can significantly improve the reliability, load-bearing capacity and impact resistance of the air bearing.

[0037] It should also be noted that, since the side foils 7 are arranged in a V-shaped structure with the arc facing inward, the transverse foils 8 are also arranged in an arc-shaped structure in the middle, and the arcs of the side foils 7 and the transverse foils 8 are all facing inward, the following performance can be achieved: ① Dispersion of impact energy: The side foils 7 and the transverse foils 8 can bend and deform when subjected to external impact or vibration. During this deformation process, the material of the foil can absorb and disperse the impact energy, thereby reducing the impact force borne by the bearing. This energy-absorbing and buffering design helps to protect the bearings and related mechanical components from damage caused by excessive force and vibration. ② Shock and vibration reduction: The arc-shaped side foils 7 and transverse foils 8 can also play a role in shock and vibration reduction during the operation of the bearing. When the bearing is vibrated or impacted, the deformation and movement of the foils can absorb and reduce these vibration forces, thereby reducing the vibration and noise levels of the mechanical system, which helps to improve the stability and work efficiency of the system. ③ Increase the contact area: The arc-shaped design of the side foil 7 and the transverse foil 8 can also increase the contact area of ​​the gas foil radial bearing. When the bearing is under load, the contact area between the foil and the bearing housing will increase, thereby dispersing the load and reducing single-point pressure, improving the bearing's load-bearing capacity and service life. In summary, the arc-shaped design of the side foil 7 and the transverse foil 8 facing inward can provide energy absorption and buffering, shock absorption and vibration reduction, and increase the contact area, thereby improving the performance and reliability of the gas foil radial bearing.

[0038] Furthermore, in the above embodiment, the side foils 7 are arranged in a V-shaped structure, with the bottom of the V-shaped structure curved inward. This provides the following benefits: 1. Dispersing impact energy: The V-shaped side foils 7 have a unique geometric shape, with a wide top that gradually narrows downward. When the gas-foil bearing is subjected to impact or vibration, the V-shaped side foils disperse the impact energy, distributing it over a wider area, thereby reducing the impact of a single-point impact on the bearing. 2. Providing elastic support: The V-shaped side foils 7 have a certain degree of elasticity, allowing them to bend and deform to adapt to external impact or vibration. When the bearing is subjected to external forces, the side foils elastically deform, protecting the main gas-foil bearing assembly by absorbing and dispersing the impact energy. 3. Enhancing the cushioning effect: The V-shaped side foils 7 produce a certain degree of compression when an impact occurs, thereby enhancing the cushioning effect of the gas-foil radial bearing. When an impact or vibration acts on the bearing, the compression deformation of the side foils slows the transmission of the impact force, prolonging the impact duration, thereby reducing the impact intensity on the bearing. ④ Improved bearing impact resistance: Due to the larger surface area of ​​the V-shaped side foils 7, they increase the impact absorption capacity of the entire gas-foil radial bearing. This increased energy absorption allows the bearing to better withstand external shock and vibration, improving its impact resistance and lifespan. In summary, the V-shaped side foils 7 effectively enhance the energy absorption and buffering function of the gas-foil radial bearing. By dispersing impact energy, providing elastic support, increasing the buffering effect, and improving impact resistance, the V-shaped side foils protect the bearing from excessive impact forces and extend its service life.

[0039] In some embodiments, the rubber strip 6 is an elliptical cylinder. When the rubber strip 6 contacts the inner walls of the side foil 7 and the transverse foil 8, it forms a compressed arc-to-arc connection, thereby achieving the following benefits: 1. Energy absorption and buffering: The rubber strip 6 acts as an energy buffer during bearing operation. When the bearing is subjected to impact or vibration, the rubber strip 6 absorbs some of the energy, reducing the extent of the impact force transmitted to the bearing structure. This helps reduce the risk of damage to the bearing and related components, extending their service life. 2. Noise and vibration reduction: The rubber strip 6 effectively reduces the noise and vibration generated by the bearing during operation. Rubber materials have excellent shock absorption and sound insulation properties, absorbing and reducing vibration and noise during operation. This ensures smoother and quieter operation of the bearing, improving the overall performance of the system. 3. Improved fatigue life: By achieving a compressed arc-to-arc connection, the rubber strip 6 provides more uniform force distribution when the bearing is subjected to radial loads. This helps reduce the risk of localized stress concentration in the bearing, reducing fatigue damage and crack formation in the material. As a result, the fatigue life of the bearing is improved, enhancing the reliability and durability of the system. ④ Adjustment capability: The design of the rubber strip 6 provides a certain degree of adjustment capability, allowing the bearing to adapt to the load and vibration conditions under different working conditions. The flexibility and plasticity of rubber enable it to deform and adapt within a certain range, thereby maintaining the stability and good working condition of the bearing. Overall, this gas foil radial bearing with energy absorption and buffering function achieves energy absorption and buffering, noise and vibration reduction, fatigue life improvement, and adjustment capability through the design and position of the rubber strip, thereby improving the performance and reliability of the bearing.

[0040] In some embodiments, the two side foils 7 have the same structure, and the two arc-shaped side foils 7 are symmetrically arranged about the rubber strip 6. The two transverse foils 8 have the same structure, and the two transverse foils 8 are symmetrically arranged about the rubber strip 6. The side foils 7 are connected to the short elliptical arc surface of the rubber strip 6, and the transverse foils 8 are connected to the long elliptical arc surface of the rubber body 6.

[0041] It can be understood that by setting the structures of the two side foils 7 and the two transverse foils 8 in each energy-absorbing unit 5 to symmetrical structures, the structure of the formed accommodating space 9 is uniform, and then when the contact pressure is applied, the force exerted by each side foil 7 and each transverse foil 8 on the rubber strip 5 is uniform, so that the two side foils 7 and the two transverse foils 8 in each energy-absorbing unit 5 are uniformly stressed and deformed, preventing uneven stress from causing one of the side foils 7 or one of the transverse foils 8 to receive a larger pressure and deform, thereby extending the service life of the energy-absorbing unit 5, and making the entire energy-absorbing foil ring 4 stressed and deformed, effectively preventing uneven stress on the energy-absorbing foil ring 4 from causing inconsistency in the axis between the circular structures of the bearing sleeve 1, the buffer structure 2 and the inner foil ring 3, thereby affecting the uniform impact resistance of the air bearing.

[0042] In some embodiments, the distance between the two ends of the V-shaped structure of the side foil 7 is h, and the distance between the two ends of the transverse foil 8 is w, where h=4.5 mm-6 mm and w=9.0 mm-11.5 mm.

[0043] It is understandable that when the foil thickness is set to the current size, it can not only meet the requirements of processing and forming, but also has better deformation ability, which is reflected in the energy absorption and shock resistance performance.

[0044] In some embodiments, the width b of the transverse foil 8 is 0.8 mm to 1.0 mm. When the thickness of the transverse foil 8 is set to the current size, it can not only meet the processing and forming requirements, but also has better deformation ability, which is reflected in the energy absorption and shock resistance performance.

[0045] In some embodiments, the internal angle α between the transverse foil 8 and the side foil 7 is 45°-60°. Setting the internal angle to 45°-60° improves structural stability and material availability, and also has a better effect on mechanical properties such as energy absorption and shock absorption.

[0046] In some embodiments, two adjacent energy absorbing units 5 are connected via side foils 7 , so that the connection between the two energy absorbing units 5 is achieved by connecting the two ends of the adjacent side wall sheets of the two energy absorbing units 5 , and the two adjacent energy absorbing units 5 are integrally formed.

[0047] It is understood that connecting two energy-absorbing units 5 via two side foils 7, ensuring that two adjacent energy-absorbing units 5 are adjacent to each other through two side foils 7, is intended to increase continuity and synergy between the energy-absorbing units. By placing side foils 7 between adjacent energy-absorbing units 5, the energy absorption and buffering between the two energy-absorbing units can be made more uniform and effective. The side foils 7 may also serve as a guide and balance, allowing the gas-foil radial bearing to better withstand radial loads and reduce the impact of vibration and shock on the system.

[0048] In addition, it should be noted that the side foil 7 and the transverse foil 8 are preferably made of metal. Different metals can be used according to different bearing capacity requirements, such as stainless steel 4169, aluminum-magnesium alloy or titanium alloy. Metals have low density, high strength, high temperature resistance, good creep resistance, and good absorption performance for vibration and shock. In addition, during the production process of the energy-absorbing foil ring 4 and the inner foil ring 3, the alloy material is placed in a circular mold, placed in a high-temperature atmosphere furnace, and sintered at high temperature with nitrogen to form it. The energy-absorbing foil ring 4 is also placed in a special corrugated mold for pressure stamping. The energy-absorbing foil ring 4 can also be 3D printed in one piece.

[0049] In some embodiments, the rubber strip 6 is bonded to the side foil 7 and the transverse foil 8 by a high temperature resistant adhesive.

[0050] It can be understood that the rubber strip 6 is fixed by clamping between the two side foils 7 and the two transverse foils 8 in the energy absorption unit 5. In addition, the high-temperature resistant adhesive is applied to the inner surfaces of the two side foils 7 and the two transverse foils 8, that is, applied to the joint surfaces of the side foils 7 and the transverse foils 8 and the rubber strip 5, so as to achieve clamping and fixing of the rubber strip 6, and further fix it by the high-temperature resistant adhesive, effectively preventing the rubber strip 6 from escaping from the accommodating space 9.

[0051] In some embodiments, a positioning groove is opened on the inner wall of the annular ring of the bearing sleeve 1, and the energy absorbing unit 5 is located in the positioning groove. The annular structure of the energy absorbing unit 5 is provided with a notch, and the inner foil ring 3 is also provided with a notch.

[0052] It can be understood that setting gaps in the energy-absorbing unit 5 and the inner foil ring 3 instead of completely closing them into a closed circular structure can facilitate the installation of the energy-absorbing foil ring 4 and the inner foil ring 3 in the bearing sleeve 1. In addition, during the installation process, the rubber strip 6 can be first fixed inside the accommodating space 9 by means of a high-temperature resistant adhesive, and then the energy-absorbing foil ring 4 with the rubber strip 5 installed can be installed in the bearing sleeve 1.

[0053] In some embodiments, the energy absorbing unit 5 is connected to the inner foil ring 3 , the contact surface of the energy absorbing unit 5 and the inner foil ring 3 is sprayed with a polytetrachloroethylene anti-wear coating, and the rubber strip 6 is silicone rubber.

[0054] It is understandable that the rubber strip 6 is set to silicone rubber. The rubber is easy to process into a desired shape, has high temperature resistance and stronger oxidation resistance than ordinary rubber, and significantly improves the service life of the bearing.

[0055] In summary, the present invention utilizes a buffer structure 2 comprised of an energy-absorbing foil ring 5 and a filler rubber strip 6. This structure provides sufficient stiffness and damping properties. Furthermore, while retaining the favorable stiffness and strength of the metal corrugated foil, the present invention incorporates high-temperature-resistant rubber, significantly enhancing the vibration damping and load-bearing capacity of the hydrodynamic gas bearing. By modifying the foil bearing's buffer structure 2 and employing a hybrid arrangement of the energy-absorbing foil ring 5 and the high-temperature-resistant rubber strip 6, the present invention improves the bearing's load-bearing capacity and its ability to mitigate impact vibrations.

[0056] It should be noted that, in the description of this application, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" is two or more.

[0057] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present application belong.

[0058] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer 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.

[0059] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A gas foil radial bearing with energy absorption and buffering function, characterized in that: It includes a bearing sleeve, a buffer structure and an inner foil ring, wherein the buffer structure is annular, and the inner foil ring, the buffer structure and the bearing sleeve are sequentially arranged from the outside to the inside; The buffer structure comprises an energy-absorbing foil ring, the energy-absorbing foil ring comprises an energy-absorbing unit, a plurality of the energy-absorbing units are sequentially connected to form a circular ring structure, and a rubber strip is provided in each of the energy-absorbing units; The energy absorbing unit includes two oppositely arranged side foils and two oppositely arranged transverse foils, the two ends of the two transverse foils are respectively connected by the two side foils, so that an accommodation space is formed between the two side foils and the two transverse foils after being connected, and the rubber strip is inserted into the accommodation space, the side foils are in a V-shaped structure, and the bottom of the V-shaped structure is an arc, the arc bending directions of the two side foils are in opposite directions, and the arc bottoms of the side foils are pressed and connected with the rubber strip; The middle parts of the two transverse foils are in an arc-shaped structure, the bottoms of the arc-shaped structures of the two transverse foils are bent in two opposite directions, and the bottoms of the arc-shaped structures in the middle parts of the transverse foils are tightly connected to the rubber strip; The rubber strip is an elliptical cylinder; The two side foils have the same structure and are symmetrically arranged with respect to the rubber strip; The two transverse foils have the same structure and are symmetrically arranged with respect to the rubber strip; The side foils are connected to the short arc surface of the ellipse of the rubber strip, and the transverse foils are connected to the long arc surface of the ellipse of the rubber strip.

2. A gas foil radial bearing with energy absorption and buffering function as claimed in claim 1, characterized in that: The distance between the two ends of the V-shaped structure of the side foil is h, and the distance between the two ends of the transverse foil is w, where h=4.5mm-6mm and w=9.0mm-11.5mm.

3. The gas foil radial bearing with energy absorption and buffering function according to claim 1, characterized in that: The width b of the transverse foil is 0.8 mm to 1.0 mm.

4. The gas foil radial bearing with energy absorption and buffering function according to claim 1, characterized in that: The internal angle α between the transverse foil and the side foil is 45°-60°.

5. The gas foil radial bearing with energy absorption and buffering function according to claim 1, characterized in that: Two adjacent energy absorbing units are connected via the side foils, so that the connection of the two energy absorbing units is achieved by connecting the two ends of the adjacent side wall pieces of the two energy absorbing units, and the two adjacent energy absorbing units are integrally formed.

6. The gas foil radial bearing with energy absorption and buffering function according to claim 1, characterized in that: The rubber strip is bonded to the side foils and the transverse foils by a high-temperature resistant adhesive.

7. The gas foil radial bearing with energy absorption and buffering function according to claim 1, characterized in that: A positioning groove is provided on the inner wall of the annular ring of the bearing sleeve, and the energy absorbing unit is located in the positioning groove. The annular structure of the energy absorbing unit is provided with a notch, and the inner foil ring is also provided with a notch.

8. The gas foil radial bearing with energy absorption and buffering function according to claim 1, characterized in that: The energy absorbing unit is connected to the inner foil ring, and the contact surfaces of the energy absorbing unit and the inner foil ring are sprayed with a polytetrachloroethylene anti-wear coating, and the rubber strip is silicone rubber.

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