CN213981639U - Concave-pit type dynamic pressure gas thrust foil bearing - Google Patents

Abstract

The utility model discloses gaseous thrust foil bearing of pit type dynamic pressure relates to air bearing technical field, especially relates to the gaseous thrust foil bearing of dynamic pressure that can bear certain axial load. The utility model discloses a: the elastic supporting element, the bearing seat and the pin; the elastic supporting element is of a fan-shaped structure and comprises a bubbling foil with a pit structure uniformly distributed on the surface and a plugboard which is processed on one side of the bulge of the bubbling foil and used for installation; the bearing block is of an annular structure, and a bearing block groove and a bearing block pin hole are processed on the bearing block; the number of the elastic supporting elements is N; the N elastic supporting elements are combined to form an annular structure with the same inner diameter and the same outer diameter as the bearing seat; the elastic supporting element is fixedly assembled with the bearing seat in a mode that a groove structure is matched with the pin. The technical scheme of the utility model friction themogenesis among the prior art is serious, and lubricated gas flow resistance is high, the serious scheduling problem of wearing and tearing.

Description

Concave-pit type dynamic pressure gas thrust foil bearing

Technical Field

The utility model discloses gaseous thrust foil bearing of pit type dynamic pressure relates to air bearing technical field, especially relates to the gaseous thrust foil bearing of dynamic pressure that can bear certain axial load.

Background

The rotary machine has wide application in the fields of aerospace, low-temperature refrigeration, petrochemical industry, traffic and the like. At present, rotary machines are developing towards high rotating speed, high efficiency, low maintenance cost, strong environmental adaptability and the like. The bearing is a basic part which is not necessary to be lacked in the modern mechanical equipment, plays a role in supporting and reducing the load friction coefficient in the mechanical transmission process, and the performance, the service life and the reliability of the bearing play a decisive role in the performance and the reliability of a main machine. The elastic foil dynamic pressure gas bearing is a self-acting dynamic pressure flexible bearing taking a flexible surface as a support, and generates a lubricating gas film through two solid surfaces with wedge-shaped gaps moving mutually and lubricating gas between the wedge-shaped gaps so as to support load and avoid the two solid surfaces from contacting with each other. Compared with a traditional rolling bearing or an oil-lubricated sliding bearing, the elastic foil dynamic pressure gas bearing has the advantages of small mass, high reliability, no contact, low noise, low vibration, great design freedom and the like.

Gas bearings can be broadly classified into three categories according to the load bearing principle: aerostatic bearings, aerodynamic bearings, which can be further divided into rigid bearings and elastic foil bearings, and gas squeeze film bearings. The machining precision of the rigid bearing is relatively high, and meanwhile, a rotor system supported by the rigid bearing is difficult to meet the requirements of reliability and stability. The elastic foil dynamic pressure gas bearing mainly has two forms: an elastic foil hydrodynamic gas radial bearing and an elastic foil hydrodynamic gas thrust bearing. The most widely used dynamic pressure gas bearing at present is a flexible surface dynamic pressure gas bearing, the flexible surface is mostly made of metal foils and is divided into a top flat foil and a corrugated foil positioned between the flat foil and a bearing seat, the foils can generate certain deformation under the action of air film pressure, the bearing can generate different air film thicknesses to meet the requirements of different running conditions in the running process, compared with the elastic foil dynamic pressure gas bearing, the friction force between the flat foil and the corrugated foil of the rigid surface bearing and between the corrugated foil and the bearing shell can absorb certain vortex energy, and the bearing has higher stability at high rotating speed.

The theory and technical research of the foil dynamic pressure gas bearing relates to the fields of materials science, structural mechanics, heat transfer science, manufacturing technology science, tribology and the like, and is a complex multi-disciplinary comprehensive problem. In a foil bearing mainly using gas lubrication, the problems of foil material requirements, foil processing and manufacturing processes and foil surface plating are solved, and the precondition for the application of the foil bearing to practical engineering is that the foil bearing is used for the actual engineering. In recent years, thrust foil bearings have evolved largely around the development of improvements to existing support structures and the development of new support structure designs. Similar to a rigid surface dynamic pressure bearing, a wedge-shaped gap exists between the surface of a thrust plate of a dynamic pressure gas thrust bearing and the surface of a flat foil, and after the thrust plate rotates at a high speed, gas between the thrust plate and an inclined surface is driven to move to form a fluid dynamic pressure film, so that the thrust plate is separated from the flat foil, and the formed fluid dynamic pressure film can provide a certain axial force. The dynamic pressure gas thrust foil bearing is modified, the structural parameters of the bearing are optimized, the problem that the friction and heat generation among gas molecules are serious due to the micron-sized gas film thickness in the high-speed operation process of the bearing is solved, the flow resistance of lubricating gas is reduced, and the problem that the abrasion is serious in the operation process of the bearing is solved, so that the integral performance of the bearing is improved and the bearing is necessary to be further applied in the industrial field.

In view of the problems in the prior art, it is necessary to develop a novel dimple type hydrodynamic thrust foil bearing to overcome the problems in the prior art.

Disclosure of Invention

According to the technical problems of serious frictional heat generation, high flow resistance of lubricating gas, serious abrasion and the like in the prior art, the pit type dynamic pressure gas thrust foil bearing is provided. The utility model discloses the bubbling foil piece that mainly adopts to have the pit structure replaces flat foil piece and ripple foil piece to play save material, alleviate bearing weight, the gaseous heat transfer level between reinforcing bearing surface and the thrust dish reduces the effect of flowing gas pressure differential resistance).

The utility model discloses a technical means as follows:

a dimple-type dynamic gas thrust foil bearing comprising: the elastic supporting element, the bearing seat and the pin;

furthermore, the elastic supporting element is of a fan-shaped structure and comprises a bubbling foil with a pit structure uniformly distributed on the surface and a plug board which is processed on one side of the bulge of the bubbling foil and used for installation;

furthermore, the bearing seat is of an annular structure, and a bearing seat groove and a bearing seat pin hole are processed on the bearing seat;

further, the number of the elastic supporting elements is N; the N elastic supporting elements are combined to form an annular structure with the same inner diameter and the same outer diameter as the bearing seat;

furthermore, the elastic supporting element is fixedly assembled with the bearing seat in a mode that a groove structure is matched with the pin.

Furthermore, the bearing seat grooves are radially processed on the upper surface of the bearing seat, the number of the bearing seat grooves is N, and the cross section of each bearing seat groove is of an L-shaped structure;

further, the bearing seat pin hole is processed on the lower surface of the bearing seat, is positioned below the bearing seat groove and penetrates through the bearing seat groove from bottom to top;

further, the number of the pin holes is at least twice as many as the number of the grooves, and the pin holes are uniformly distributed.

Furthermore, pin holes with the same number and the same diameter as the pin holes are machined in the inserting plate.

Furthermore, the inserting plate of the elastic supporting element is inserted into the groove of the bearing seat from the outer side of the bearing seat, and after the pin hole is aligned with the pin hole, the pin is inserted to fixedly connect the elastic supporting element and the bearing seat. The elastic supporting element is inserted into one side of the groove to form an inclined surface, a wedge-shaped gap is formed between the inclined surface of the bearing elastic supporting element and the thrust disc, lubricating gas with certain viscosity is arranged in the wedge-shaped gap, and when the lubricating gas is driven by the movement between the solid surfaces to move from the large end of the gap to the small end of the gap, gas film pressure is generated to bear certain external load, so that certain axial supporting force is provided.

Further, a chromium coating with small temperature rise and small thermal deformation is processed on one convex side of the concave structure of the elastic supporting element; the chromium coating has excellent performance, high hardness, high heat resistance, small friction coefficient, especially dry friction coefficient, and high wear resistance. The surface of the elastic element of the bearing is well protected, and the service life of the bearing is prolonged.

Furthermore, after the elastic supporting element is installed, one side of the bulge is tightly attached to the upper surface of the bearing seat; the bubbling structure can generate certain deformation under the action of air film pressure when the bearing operates at high speed, certain rigidity and damping are provided, and the bearing generates different air film thicknesses in the operation process to meet the requirements of different operation conditions.

Furthermore, one side of a concave pit of the concave pit structure of the elastic supporting element is sprayed with a polytetrafluoroethylene wear-resistant coating, and the polytetrafluoroethylene wear-resistant coating has the characteristics of high temperature resistance and friction resistance, so that the surface of the bearing is effectively protected, the requirement of the complex working environment of the bearing is met, and the service life of the bearing is prolonged.

Further, a layer of a wear resistant coating of polytetraethylene is used to fill the pits and form a resilient support surface. One side of the pit can be selected to be filled with a polytetrafluoroethylene coating or leave a certain pit according to the requirements of the actual bearing conditions of the bearing, and when a certain pit is left, the heat exchange level of gas between the bearing surface and the thrust disk can be enhanced, so that the temperature rise of the bearing is slower, and the pressure difference resistance of the flowing gas between the bearing surface and the thrust disk is reduced.

Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model provides a pit type dynamic pressure gas thrust foil bearing compares with traditional dynamic pressure gas thrust foil bearing and uses the bubbling foil piece that the surface chromium plating was handled to replace traditional flat foil piece and ripple foil piece, has alleviateed the weight of bearing, has saved the material, makes the manufacturing of bearing simpler. Meanwhile, a polytetrafluoroethylene anti-wear coating is sprayed on the surface of the bearing to form an elastic supporting plane, the temperature of the bearing rises slowly after the chromium plating treatment, the thermal deformation is smaller, and the service life of the bearing is longer;

2. the utility model provides a pit type dynamic pressure gas thrust foil bearing, elastic support component are tympanic bulla foil structure, and tympanic bulla foil is all changeable along radial direction and circumferencial direction rigidity, and the rigidity characteristic of tympanic bulla foil can homogenization pressure, and the foil of coordination warp, improve the rigidity distribution and the assembly characteristic of bearing, enlarge the variation range of bearing rigidity, improve bearing capacity. When one side of the elastic supporting element pit is sprayed with a polytetrafluoroethylene coating, the elastic supporting element pit is selectively filled or a certain pit is reserved according to the actual bearing requirement of the bearing, a normal supporting plane is formed when the bubbling pit is filled, when a certain pit is reserved, the convective heat transfer coefficient between the gas between the bearing surface and the thrust disk can be enhanced, the heat transfer thermal resistance is reduced, the heat transfer is enhanced, the heat transfer effect of the flat plate with the pit can be enhanced by 19%, and the problem that the friction heat generation among gas molecules is serious due to the micron-sized gas film thickness in the high-speed running process of the bearing can be better solved

3. The utility model provides a pit type dynamic pressure gas thrust foil bearing, pit are as a vortex generator, and after the fluid got into the pit in the boundary layer, can take place the separation and form certain vortex structure inside the pit, the mixing between the fluid of boundary layer can be promoted in the formation of these flow structure, plays acceleration effect to the fluid, promotes the fluid emergence in the boundary layer and from the laminar flow state to the transition of torrent flow state and twisted. The transition can delay the separation of the boundary layer, the pressure difference resistance of the flowing gas between the bearing surface and the thrust plate can be effectively reduced, the surface with the pit array arrangement can reduce the gas flow resistance coefficient by 20 percent, and the running performance of the bearing is improved;

4. the utility model provides a pit type dynamic pressure gas thrust foil bearing opens on the bearing frame and has slot and cotter hole, inserts oblique slot after the elastic support component lateral buckling, inserts the pin in the cotter hole and is used for pushing up tight elastic support component, plays the fixed action, and the fixed mode that the slot adds the cotter hole makes the bearing assembly simpler, and fixed effect is better

5. The utility model provides a pit type dynamic pressure gas thrust foil bearing, different with traditional oil lubrication thrust bearing, utilize the air as emollient, the air plays lubricated and radiating effect, and the air film force that the gaseous dynamic pressure effect produced can provide certain axial force, compares in traditional oil lubrication thrust bearing, does not need oil supply unit, has alleviateed thrust bearing's whole weight, and the reliability is higher.

To sum up, use the technical scheme of the utility model friction themogenesis among the prior art is serious, and lubricated gas flow resistance is high, the serious scheduling problem of wearing and tearing.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is an exploded view of the present invention;

FIG. 2 is a schematic structural view of the bubbling foil polytetrafluoroethylene wear-resistant layer of the present invention with a certain recess left when filling the pit;

FIG. 3 is a schematic structural view of the pits filled with the anti-wear layer of the bubbling foil polytetrafluoroethylene according to the present invention;

FIG. 4 is a top isometric view of the bearing block;

FIG. 5 is a bottom view of the bearing seat;

FIG. 6 is a top isometric view of the resilient support member;

FIG. 7 is a bottom isometric view of the resilient support member;

fig. 8 is a schematic view of a pin structure.

In the figure: 1. the bearing comprises an elastic supporting element 2, a bearing seat 3, a pin 4, a polytetrafluoroethylene wear-resistant coating 5, a bubbling foil 6, a chromium coating 7, a bearing seat groove 8, a bearing seat pin hole 9, a pin hole 10, a protrusion 11, a pit 12 and an inserting plate.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element in question must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

As shown in fig. 1-8, the utility model provides a pit type dynamic pressure gas thrust foil bearing includes: the device comprises an elastic supporting element 1, a bearing seat 2 and a pin 3; the elastic supporting element 1 is of a fan-shaped structure and comprises a bubbling foil 5 with a pit structure uniformly distributed on the surface and an inserting plate 12 which is processed on one side of the bulge of the bubbling foil 5 and used for installation; the bearing seat 2 is of an annular structure, and is provided with a bearing seat groove 7 and a bearing seat pin hole 8; the number of the elastic supporting elements 1 is N; the N elastic supporting elements are combined to form an annular structure with the same inner diameter and the same outer diameter as the bearing seat 2; the elastic supporting element 1 is fixedly assembled with the bearing seat 2 in a mode that a groove structure is matched with the pin 3.

The bearing seat grooves 7 are radially processed on the upper surface of the bearing seat 2, the number of the grooves is N, and the cross section of each groove is of an L-shaped structure; the bearing seat pin hole 8 is processed at the lower part of the bearing seat 2, is positioned below the bearing seat groove 7 and penetrates through the bearing seat groove 7 from bottom to top; the number of pin holes 8 is at least twice the number of grooves and is evenly distributed.

The inserting plate 12 is provided with pin holes 9 with the same number and the same aperture as the pin holes 8.

An inserting plate 12 of the elastic supporting element 1 is inserted into the bearing seat groove 7 from the outer side of the bearing seat 2, and after the pin hole 9 is aligned with the pin hole 8, the pin 3 is inserted to fixedly connect the elastic supporting element 1 and the bearing seat 2.

A chromium coating 6 is processed on one side of the bulge 10 of the pit structure of the elastic supporting element 1; after the elastic supporting element 1 is installed, one side of the bulge 10 is tightly attached to the upper surface of the bearing seat 2.

One side of a pit 11 of the pit structure of the elastic supporting element 1 is sprayed with a polytetrafluoroethylene wear-resistant coating 4, and the polytetrafluoroethylene wear-resistant coating 4 is used for filling the pit 11 and forming an elastic supporting surface.

Example 1

Referring to fig. 1, a dimple type hydrodynamic thrust foil bearing includes: an elastic support element 1; a bearing seat 2; a pin 3; the bearing seat 2 is provided with a bearing seat groove 7 and a bearing seat pin hole 8, the elastic supporting element 1 is inserted into the bearing seat groove 7 at the outer side of the circumference of the bearing seat 2, and a pin 3 is inserted into the bearing seat pin hole 8 to fix the elastic supporting element 1 and form an assembly body.

As shown in fig. 1-3, 6 and 7, the elastic support element 1 is a blister foil structure. The bubbling structure can generate certain deformation under the action of air film pressure when the bearing runs at high speed, and provides certain rigidity and damping. One side of the bulge 10 of the bubbling foil 5 is subjected to chromium plating treatment and is arranged close to the surface of the bearing seat 2, the chromium plating layer 6 has excellent performance, the chromium plating layer 6 has high hardness and high heat resistance, and meanwhile, the chromium plating layer 6 has small friction coefficient, especially dry friction coefficient, and high wear resistance. Has good protection effect on the surface of the bearing elastic supporting element 1. The surface of the elastic supporting element 1 is sprayed with a polytetrafluoroethylene wear-resistant coating 4, one side of the pit 11 can be selected to be filled with the wear-resistant coating or leave a certain pit 11 according to the requirements of the actual bearing conditions of the bearing, when a certain pit 11 is left, the convective heat transfer coefficient between the gas between the bearing surface and the thrust plate can be enhanced, the heat transfer thermal resistance is reduced, the heat transfer is enhanced, the temperature rise of the bearing is more slowly increased, the thermal deformation of the bearing surface is reduced, the pressure difference resistance of the flowing gas between the bearing surface and the thrust plate can be effectively reduced due to the existence of the pit 11, the running performance of the bearing is improved, and the wear to the bearing is reduced.

As shown in fig. 4 and 5, the number of the bearing seat grooves 7 is the same as that of the elastic support members 1, the number of the pin holes 3 is twice as many as that of the grooves 7, and the arrangement of the elastic support members 1 on the bearing seat 2 is consistent. The elastic supporting element 1 is a nickel 718 alloy with a thickness of between 0.1mm and 0.2 mm. The nickel 718 alloy has the advantages of easy processing, good mechanical property, high-temperature oxidation resistance and better welding property compared with other alloys. The blister foil 5 is heat treated before press forming, and the heat treatment is divided into solution heat treatment for sufficiently dissolving various phases in the alloy and double aging heat treatment. Improve the plasticity and toughness of the alloy, and the softened material is prepared for punching the corrugated foil. After the foil is subjected to solution treatment, the foil can be well punched and formed, and the rebound quantity of the bump foil is almost zero. The wave foil after stamping has poor elasticity, and the aging treatment and strengthening treatment are required to recover the elastic property and fatigue strength of the wave foil. Experiments prove that the nickel 718 alloy shows good working performance after heat treatment, and can effectively improve the mechanical processing performance of the foil.

As shown in fig. 6 and 7, the elastic supporting element 1 is subjected to press forming under the action of a stamping die before the chromium plating treatment, and the bubbling foil 5 with the bubbling supporting structure is obtained after the press forming, and an inserting plate 12 is processed at the same time, so that the elastic supporting element 1 can be conveniently inserted into the bearing seat groove 7 for fixing and assembling. The punched elastic supporting element 1 is uniformly provided with bubbling bulges in 6 structures along the circumferential direction and the radial direction on the sector surface, the bubbling bulges in 6 structures along the circumferential direction are uniformly provided, the bubbling bulges in 7 structures along the radial direction are uniformly provided, and the number of the bubbling bulges 10 can be adjusted according to the angle of the sector surface of the elastic supporting element 1. The rigidity of the bubbling protrusions 10 in the circumferential direction and the radial direction can be changed, the rigidity characteristic of the bubbling foils is helpful for the bearing to adapt to uneven pressure distribution caused by linear velocity difference in the radial direction, two circular holes 9 are formed in the elastic supporting element, the positions and the sizes of the circular holes 9 are consistent with those of the pin holes 8 in the bearing seat, and the number of the elastic supporting elements 1 can be changed according to the actual working requirements of the bearing.

As shown in fig. 1 and 8, the pin 3 engages with the groove 7 of the bearing seat to fix the elastic support element 1.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (6)

1. A pit type dynamic pressure gas thrust foil bearing is characterized in that:

the dimple type hydrodynamic thrust foil bearing includes: the device comprises an elastic supporting element (1), a bearing seat (2) and a pin (3);

the elastic supporting element (1) is of a fan-shaped structure and comprises bubbling foils (5) with pit structures uniformly distributed on the surface and inserting plates (12) which are processed on one sides of bulges of the bubbling foils (5) and used for installation;

the bearing seat (2) is of an annular structure, and a bearing seat groove (7) and a bearing seat pin hole (8) are processed on the bearing seat;

the number of the elastic supporting elements (1) is N; the N elastic supporting elements are combined to form an annular structure with the same inner diameter and outer diameter as those of the bearing seat (2);

the elastic supporting element (1) is fixedly assembled with the bearing seat (2) in a mode that a groove structure is matched with the pin (3).

2. A dimple-type hydrodynamic gas thrust foil bearing in accordance with claim 1, wherein:

the bearing seat grooves (7) are radially processed on the upper surface of the bearing seat (2), the number of the bearing seat grooves is N, and the cross section of each bearing seat groove is of an L-shaped structure;

the bearing seat pin hole (8) is processed on the lower surface of the bearing seat (2), is positioned below the bearing seat groove (7), and penetrates through the bearing seat groove (7) from bottom to top;

the number of the pin holes (8) is at least twice of the number of the grooves, and the pin holes are uniformly distributed along the circumferential direction of the bearing seat.

3. A dimple-type hydrodynamic gas thrust foil bearing according to claim 1 or 2, wherein:

the inserting plate (12) is provided with pin holes (9) which have the same number and the same aperture as the pin holes (8).

4. A dimple-type hydrodynamic gas thrust foil bearing in accordance with claim 1, wherein:

the inserting plate (12) of the elastic supporting element (1) is inserted into the bearing seat groove (7) from the outer side of the bearing seat (2), and after the pin hole (9) is aligned with the pin hole (8), the pin (3) is inserted to fixedly connect the elastic supporting element (1) and the bearing seat (2).

5. A dimple-type hydrodynamic gas thrust foil bearing in accordance with claim 4, wherein:

a chromium coating (6) is processed on one side of the bulge (10) of the pit structure of the elastic supporting element (1); after the elastic supporting element (1) is installed, one side of the bulge (10) is tightly attached to the upper surface of the bearing seat (2).

6. A dimple-type hydrodynamic gas thrust foil bearing in accordance with claim 5, wherein:

one side of a pit (11) of the pit structure of the elastic supporting element (1) is sprayed with a polytetrafluoroethylene anti-wear coating (4), and the polytetrafluoroethylene anti-wear coating (4) is used for filling the pit (11) and forming an elastic supporting surface.

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