CN217682815U - Air bearing, rotor assembly, compressor and heating and ventilation equipment - Google Patents

Abstract

The application discloses air bearing, rotor assembly, compressor and warm equipment of leading to, air bearing is including the mount pad, ripples paper tinsel and the top paper tinsel that stack gradually, and is same first wave band and second wave band have on the ripples paper tinsel, first wave band with the second wave band has different thickness. As can be seen from the above, the air bearing in the application improves the structure of the wave foil, adopts the structure with different thicknesses, and ensures the elastic performance of the wave foil. And the shock resistance of the wave foil is ensured, so that the rotor runs more stably.

Description

Air bearing, rotor assembly, compressor and heating and ventilation equipment

Technical Field

The utility model relates to a bearing technical field, in particular to air bearing, including this air bearing's rotor assembly, including this air bearing's compressor and including this air bearing's warm equipment of leading to.

Background

The core component of the refrigeration system is a compressor, in the prior compressor, the lubricating medium of a sliding bearing is lubricating oil, but the lubricating oil has high viscosity, generates high friction power consumption at high rotating speed, and influences the heat exchange effect of a heat exchanger due to the existence of the lubricating oil after long-term use, so that the performance of the refrigeration system is reduced. Therefore, magnetic suspension bearings are adopted to replace the prior art, have the advantages of low friction loss and good stability, but have higher cost and unobvious advantages when being applied to small and medium-sized compressors.

SUMMERY OF THE UTILITY MODEL

The present application is directed to solving, at least in part, one of the technical problems in the related art. To this end, the present application proposes an air bearing. The air bearing in this application adopts the not thickness structure of equalling through improving the structure to the ripples paper tinsel, has both guaranteed the elasticity performance of ripples paper tinsel. And the shock resistance of the wave foil is ensured, so that the rotor runs more stably.

The air bearing comprises a mounting seat, a wave foil and a top foil which are sequentially stacked, wherein the same wave foil is provided with a first wave band and a second wave band, and the first wave band and the second wave band have different thicknesses.

According to the air bearing provided by the embodiment of the invention, the structure of the wave foil is improved, and the structure with different thicknesses is adopted, so that the elastic property of the wave foil is ensured. And the shock resistance of the bump foil is ensured, so that the rotor runs more stably.

In some embodiments of the present application, the first wave band and the second wave band are arranged along a circumferential direction of the air bearing.

In some embodiments of the present application, at least one of the first wavelength band and the second wavelength band includes a plurality, and the first wavelength band and the second wavelength band are alternately arranged in a circumferential direction of the air bearing.

In some embodiments of the present application, the thickness of the bump foil varies uniformly along the circumference of the air bearing.

In some embodiments of the present application, the bump foil has a bump segment and a land segment, the first band includes at least one of the bump segment and/or land segment, and the second band includes at least one of the bump segment and/or land segment.

In some embodiments of the present application, at least one corrugated segment of the corrugated foil has a greater thickness than an adjacent connecting segment; and/or at least one corrugated section of the corrugated foil has a smaller thickness than an adjacent connecting section.

In some embodiments of the present application, a plurality of bump foils are disposed along an axial direction of the mount, and the first wavelength band and the second wavelength band are alternately or alternately arranged in the axial direction.

In some embodiments of the present application, a plurality of the bump foils are arranged in a stacked manner between the top foil and the mounting base, and at least one of the plurality of bump foils is provided with the first wavelength band and the second wavelength band.

In some embodiments of the present application, the plurality of wave foils comprises a first wave foil and a second wave foil, the first wave foil having a region of different thickness than a corresponding location on the second wave foil.

In some embodiments of the present application, the first and second foils each have a corrugated section, the corrugated sections of the first and second foils are stacked, and at least one corrugated section thickness of the first foil is different from a thickness of a corresponding corrugated section of the second foil.

In some embodiments of the present application, the first and second bump foils each have a connecting section, the connecting section of the first bump foil is laminated with the connecting section of the second bump foil, and at least one connecting section thickness of the first bump foil is different from a thickness of a corresponding connecting section of the second bump foil.

In some embodiments of the present application, the first and second bump foils each have bump segments and connecting segments, the bump segments of the first bump foil are stacked with the connecting segments of the second bump foil, and at least one bump segment thickness of the first bump foil is different from a corresponding connecting segment thickness of the second bump foil.

In some embodiments of the present application, the air bearing is a radial air bearing or an axial air bearing.

The present application further provides a rotor assembly, the rotor assembly further comprising: the radial air bearing is sleeved on the periphery of the rotor, the radial air bearing is formed according to the air bearing, and the mounting seat, the wave foil and the top foil of the radial air bearing are sequentially laminated from outside to inside along the radial direction of the rotor; and/or the axial air bearing is matched with the rotor, the axial air bearing is based on the air bearing, and the mounting seat, the wave foil and the top foil of the axial air bearing are sequentially stacked along the axial direction of the rotor.

The application also discloses a compressor, which comprises the air bearing of any one of the embodiments; or a rotor assembly including any of the embodiments described above.

The application also provides heating and ventilation equipment which comprises the air bearing; or a rotor assembly according to the foregoing; or include the aforementioned compressor.

The air bearing in this application adopts the not thickness structure of equalling in the same ripples paper tinsel through improving the structure of ripples paper tinsel, has both guaranteed the elasticity performance of ripples paper tinsel, has still guaranteed the shock resistance of ripples paper tinsel for the operation of rotor is more steady.

Drawings

FIG. 1 is a schematic cross-sectional view of an air bearing according to an embodiment of the present disclosure;

FIG. 2 is a schematic representation of a first waveband and a second waveband of a bump foil in an embodiment of the present application;

FIG. 3 is a schematic representation of a first band and a second band of a wave foil in an embodiment of the present application;

FIG. 4 is a schematic representation of a first waveband and a second waveband of a bump foil in an embodiment of the present application;

FIG. 5 is an enlarged view of the structure shown in phantom lines labeled A in FIG. 1;

FIG. 6 is an enlarged view of the dotted line labeled B in FIG. 1;

FIG. 7 is a schematic cross-sectional view of an embodiment of an air bearing.

FIG. 8 is a schematic view of a rotor assembly according to an embodiment of the present application.

Reference numerals are as follows:

the structure comprises a rotor assembly 10, a rotor 11, an axial air bearing 12a and a radial air bearing 12b;

the mounting seat 100, the mounting groove 110 and the pin hole 111;

bump foil 200, first band 201, second band 202, corrugated segment 203, connecting segment 204;

a first wave foil 210, a corrugated section 211 of the first wave foil, a connecting section 212 of the first wave foil;

a second wave foil 220, a corrugated section 221 of the second wave foil, a connecting section 222 of the second wave foil;

a top foil 300.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.

China is the biggest world producing, consuming and exporting country of refrigeration products, and the refrigeration energy consumption accounts for 15 percent of the total social energy consumption. During the peak time in summer, the increase of the refrigeration load of an air conditioner and the like not only brings heavy burden to a power grid, but also generates a large amount of warm and humid gas emission. Therefore, promoting green high-efficiency refrigeration becomes important and urgent needs for promoting energy conservation and emission reduction and coping with climate change in various countries.

Under the background of current 'carbon neutralization and carbon peak reaching', low-carbon refrigeration equipment must be developed, the core component of the refrigeration equipment is a refrigeration compressor, the refrigeration compressor is a fluid machine for lifting low-pressure gas into high-pressure gas, and is the heart of a refrigeration system, low-temperature low-pressure refrigerant gas is sucked from a gas suction pipe, a piston is driven by the operation of a motor to compress the refrigerant gas, and high-temperature high-pressure refrigerant gas is discharged to an exhaust pipe to provide power for refrigeration cycle. There are various kinds of refrigeration compressors, such as a reciprocating piston compressor, a rotary compressor, a scroll compressor, etc., but no matter which compressor is used, the work of the refrigerant gas is realized without the action of a mechanical part, and a bearing is an important part.

The bearing is an important part in the modern mechanical equipment, and the main function of the bearing is to support a mechanical rotating body, reduce the friction coefficient in the movement process of the mechanical rotating body and ensure the rotation precision of the mechanical rotating body. In the conventional refrigeration compressor, a sliding bearing is adopted, but the sliding bearing needs to use a lubricating medium, generally speaking, the lubricating medium is lubricating oil, but the lubricating oil has high viscosity, so that high friction power consumption is generated under high rotating speed, and in addition, the heat exchange effect of a heat exchanger in a refrigeration system is influenced due to the existence of the lubricating oil after long-term use, so that the performance of the refrigeration system is reduced. Therefore, a scheme adopting a magnetic suspension bearing is provided at present, the magnetic suspension bearing has the advantages of low friction loss and good stability, but the cost is higher, and the advantage of the magnetic suspension bearing applied to small and medium-sized compressors is not obvious. Therefore, the air bearing has the advantages of high rotating speed, high efficiency, low friction loss and the like, and is very suitable for small and medium-sized compressors.

In some embodiments of the present application, referring to fig. 1, an air bearing, also known as an air bearing, a gas bearing, includes a mount 100, a bump foil 200, and a top foil 300. The same wave foil has a first wave band and a second wave band, and the first wave band and the second wave band have different thicknesses.

As can be seen from the above, the wave foil and the top foil 300 form an elastic system, so that the rotor is in a dynamic balance during rotation, the wave foil and the top foil 300 can adjust the gap between the top foil 300 and the rotor by changing their shapes at any time, and then the rotor is stably rotated, that is, the elastic system formed by the wave foil and the top foil 300 needs to support the rotor and also needs to realize a certain deformation, but this is a contradiction point, so that if the wave foil and the top foil 300 realize a certain elasticity, the thicknesses of the wave foil and the top foil 300 cannot be too large, and if the thicknesses of the wave foil and the top foil 300 are too small, the supporting performance of the wave foil and the top foil 300 will be reduced, so that the rotor does not run smoothly, and the impact resistance is weak. In order to overcome such a problem, the present application is therefore designed by making improvements to the wave foil by dividing the wave foil into at least two bands, namely a first band 201 and a second band 202, with different thicknesses between the two bands.

The present application mainly uses a radial air bearing as an example, but this is not a limitation to the scope of the present application.

The mounting seat 100, also called a bearing housing, is made of a metal material, is a finished component, can bear a comprehensive load, and is used for fixing the bump foil and the top foil 300. The mounting seat 100 has a hollow cylindrical shape as a whole, and the bump foil and the top foil 300 are located in the mounting seat 100 and fixed to the mounting seat 100. Two mounting grooves 110 are formed on the inner side of the mounting seat 100, and referring to the orientation shown in fig. 5, the two mounting grooves 110 are located above the mounting seat 100, each mounting groove 110 is provided with a pin hole 111, one mounting groove 110 is used for fixing the bump foil, and the other mounting groove 110 is used for fixing the top foil 300.

The bump foil and the top foil 300 are sequentially arranged from the outside of the mounting seat 100 to the inside of the mounting seat 100, the bump foil and the top foil 300 can be made of beryllium bronze, nickel-based alloy, high-strength stainless steel and the like, the bump foil is of an elastically deformable structure and provides support for the top foil 300, generally, the bump foil is corrugated/wavy, elastic deformation can occur when the bump foil is subjected to load, the bump foil can restore to the original state when the load disappears, and the bump foil provides a foundation for deformation of the air bearing. The bump foil is extended along the inner surface of the mounting seat 100, and one end of the bump foil, i.e., the right end as shown, is inserted into the mounting groove 110 on the right side and then locked with a pin, and the left end of the bump foil is in a free state.

The top foil 300 is a foil having a smooth surface, which extends along the inner surface of the mounting seat 100 to provide a smooth flexible surface for hydrodynamic pressure formation, and one end, i.e., the illustrated left end, of the top foil 300 is inserted into the mounting groove 110 at the left side and then locked with a pin, and the right end of the top foil 300 is in a free state. The bump foil is positioned between the mounting base 100 and the top foil 300, the free end (left end in the figure) of the bump foil and the fixed end (left end in the figure) of the top foil 300 are positioned on the same side, and the fixed end (right end in the figure) of the bump foil and the free end (right end in the figure) of the top foil 300 are positioned on the same side.

When the air bearing is applied to a product, the air bearing needs to be matched with a rotor (such as a rotating shaft) for use, the rotor is installed in the installation seat 100, the bump foil, the top foil 300 and the rotor are sequentially arranged from the outside of the installation seat 100 to the inside of the installation seat 100, and the rotor is rotatably arranged in the installation seat 100, so that a basic structure of the air bearing in the application is formed. The wave foils and the top foil 300 are of various structural forms, different structures of the wave foils will provide different properties for the wave foils, and the same is true for the top foil 300, and different structures of the top foil 300 will provide different properties, again without limitation. The bump foil and the top foil 300 jointly form a flexible system, when the rotor rotates and the rotating speed is high enough, due to the action of force, the rotor can generate certain eccentricity relative to the mounting seat 100, so that a narrow gap is generated between the rotor and the top foil 300, the gap forms a wedge-shaped space, along with the rotation of the rotor, the surrounding gas of the air-floating bearing is sucked into the gap formed between the rotor and the top foil 300, so that a dynamic pressure gas film with certain pressure is formed, the dynamic pressure gas film enables the flexible bump foil and the top foil 300 to deform, the gap between the rotor and the top foil 300 is changed, the dynamic pressure gas film is changed, and the rotor is equivalent to a suspension state until the pressure of the dynamic pressure gas film is high enough to support the rotor and stably operate, and therefore, the air-floating bearing is equivalent to a sliding bearing using gas as a lubricating medium, and the friction force can be greatly reduced.

As shown in fig. 1, in some embodiments of the present application, the mount 100, the bump foil 200, and the top foil 300 are sequentially stacked, and the second wavelength band 202 and the first wavelength band 201 are divided in the same bump foil 200. The wave bands, i.e. the portions having a certain length along the circumferential direction of the mounting base 100, are, as shown in the orientation of fig. 2, a first wave band 201 at the lower half of the circumference, and a second wave band 202 at the upper half of the circumference, and the first wave band 201 has a larger thickness than the second wave band 202. Such a configuration is particularly advantageous for use when the air bearing is disposed axially horizontally. Specifically, the first wave band 201 has a greater thickness and therefore a greater structural strength, and the first wave band 201 can carry more of the fluctuating load of the rotor when the rotor is started and at a low rotation speed, and this is more favorable for the formation of the dynamic pressure gas film, which is favorable for the formation of the dynamic pressure gas film, so that the wear occurring between the rotor and the top foil 300 can be prevented.

In addition to the second wave band 202 and the first wave band 201 shown in fig. 1, in some embodiments of the present application, the first wave band 201 may occupy 2/3 of the entire circumference, and the second wave band 202 may occupy 1/3 of the entire circumference, as shown in fig. 3, in this case, the first wave band 201 and the second wave band 202 occupy 1/2 of the circumference, respectively, similarly, and further, the first wave band 201 with a larger thickness occupies a larger length, so as to further enhance the shock resistance of the entire wave foil, and due to the existence of the second wave band 202 with a smaller thickness, when the wave foil is deformed by a force, the deformation amount in the circumferential direction can be ensured, so as to ensure a certain damping, and reduce the energy caused by the rotor vibration.

The second wave band 202 and the first wave band 201 may also be arranged in such a way that, in some embodiments of the present application, as shown in fig. 4, the second wave band 202 and the first wave band 201 can be arranged alternately along the circumferential direction of the air bearing, that is, one of the second wave band 202 and the first wave band 201 includes a plurality of wave bands, or two of the second wave band 202 and the first wave band 201 include a plurality of wave bands, so as to form an alternate arrangement. For example, the first wavelength band 201 has two, the second wavelength band 202 has two, or the first wavelength band 201 has three, the second wavelength band 202 has three, or the first wavelength band 201 has one, and the second wavelength band 202 has two, by the alternating arrangement of the first wavelength band 201 and the second wavelength band 202, the supporting and elastic deformation effects of the wave foils in the circumferential direction of the mounting seat 100 are symmetrically distributed, and the rotor can run more smoothly.

In some embodiments of the present application, as shown in fig. 3, the wave foil 200 is divided into a second wave band 202 and a first wave band 201, the second wave band 202 is connected with the first wave band 201 end to end, and the thickness varies uniformly from the first wave band 201 to the second wave band 202. For example, the first wave band 201 occupies 2/3 of the circumference, the second wave band 202 occupies 1/3 of the circumference, the second wave band 202 has a gradually increasing thickness from the end far away from the first wave band 201 to the end adjacent to the first wave band 201, and the first wave band 201 has a gradually increasing thickness from the end adjacent to the second wave band 202 to the end far away from the second wave band 202, that is, the thickness of the whole wave foil is gradually changed, that is, uniformly changed, in the circumferential direction of the mounting base 100, so as to reduce the thickness discontinuity, when the top foil 300 is impacted by the rotor, the wave foil 200 can provide a more linear deformation, and prevent the top foil 300 from being deformed due to the thickness discontinuity losing support on the top foil 300, thereby avoiding gas leakage.

Further, with continued reference to fig. 1 and 2, the bump foil 200 has corrugated sections 203 and connecting sections 204, and the corrugated sections 203 and the connecting sections 204 are alternately arranged along the circumferential direction of the inner surface of the mounting seat 100, so as to form an elastic foil element structure having wavy protrusions. Corrugated segment 203 is arch-shaped protrusion, arch-shaped protrusion's corrugated segment 203 is favorable to improving its self supporting strength, simultaneously when corrugated segment 203 is compressed, corrugated segment 203 can be to both sides deformation, and corrugated segment 203's both sides are linkage segment 204, linkage segment 204 is the level and smooth form roughly, and roughly laminate the internal surface of mount pad 100, when corrugated segment 203 is compressed and appears warping, linkage segment 204 appears sliding for the internal surface of mount pad 100, and produce the slip damping between the internal surface of mount pad 100, be favorable to reducing the vibrations range of rotor. Specifically, the first waveband 201 may be a single corrugated segment 203 and/or a connection segment 204, may be a plurality of unconnected corrugated segments 203 and/or connection segments 204, and may be a corrugated segment 203 and a connection segment 204 connected together, as well as the second waveband 202.

Specifically, for example, a single corrugated section 203 constitutes the first wave section 201, and thus the connecting sections 204 on both sides of the corrugated section 203 constitute the second wave section 202, and the thickness of the first wave section 201 is larger than that of the second wave section 202. For another example, a single connecting segment 204 forms the first waveband 201, a corrugated segment 203 located at one side of the connecting segment 204 forms the second waveband 202, and the thickness of the first waveband 201 is greater than that of the second waveband 202.

Further, in some embodiments of the present application, which are not temporarily shown in the drawings, a plurality of bump foils 200 are disposed along the axial direction of the mounting seat 100, and the second bands 202 are alternately disposed or staggered with the first bands 201 in the axial direction. Specifically, when the air bearing has a certain length in the axial direction thereof, the first wave band 201 and the second wave band 202 are alternately or alternately arranged, so that the vibration of the rotor can be more suppressed in the axial direction, and the gas leakage can be prevented.

Therefore, the air-floating bearing in the application adopts gas as a lubricating medium, and the air film generated based on the dynamic pressure effect enables the rotor to suspend, the lubricating oil used by the traditional oil bearing serves as the lubricating oil medium, the air-floating bearing in the application can not generate the problem that the oil lubricating film of the oil bearing is damaged at a high rotating speed, the air-floating bearing is suitable for more application occasions, and the air film in the air-floating bearing does not need an additional air supply device, so that the running complexity and the running cost of a refrigeration system can be obviously reduced. Moreover, by improving the structure of the bump foil 200, on the premise of more effectively bearing the fluctuating load, the formation of a dynamic pressure gas film is more facilitated, and the abrasion between the rotor and the top foil 300 is effectively prevented.

As shown in fig. 6, in order to further improve the deformation performance and the impact resistance of the rotor, in some embodiments, at least two layers of bump foils, i.e., a second bump foil 220 and a first bump foil 210, at least one of which has the first wave band 201 and the second wave band 202 mentioned in the previous embodiments, are disposed between the mounting seat 100 and the top foil 300.

As shown in fig. 5, the second bump foil 220 and the first bump foil 210 are stacked, and the first bump foil 210 and the second bump foil 220 are connected to the mounting groove 110 at their right ends and are in a free state at their left ends, thereby forming a dual-layer bump foil structure. Under same thickness, for the single-layer wave foil, the rigidity has been increased to the wave foil structure that two-layer coincide set up, can effectively improve the support performance to the rotor to under the condition that external shock produced vibration or rotor misalignment, relevant adverse effect can be overcome to two-layer wave foil, in addition, under the prerequisite of guaranteeing to support rigidity, because can relative deformation/displacement between two-layer wave foil, consequently can effectively improve the flexibility, can guarantee the clearance between top foil 300 and the rotor and can self-adaptation's regulation, make the operation of rotor more steady.

Further, as shown in fig. 1 and fig. 6, the corrugated sections 211 of the first corrugated foil 210 and the corrugated sections 221 of the second corrugated foil 220 are stacked, and at least one of the corrugated sections 211 of the first corrugated foil 210 and the corrugated sections 221 of the second corrugated foil 220 stacked are different in thickness. For example, the first corrugated foil 210 is formed by alternately arranging the corrugated sections 211 and the connecting sections 212, the second corrugated foil 220 is also formed by alternately arranging the corrugated sections 221 and the connecting sections 222, the corrugated sections 211 of the first corrugated foil 210 and the corrugated sections 221 of the second corrugated foil 220 are stacked, and the connecting sections 212 of the first corrugated foil 210 and the connecting sections 222 of the second corrugated foil 220 are stacked. The corrugated section 221 of the second bump foil 220 is in contact with the top foil 300, that is, the mount 100, the first bump foil 210, the second bump foil 220, and the top foil 300 are arranged in this order from the outside of the mount 100 to the inside of the mount 100, and the thickness of the corrugated section 211 of the first bump foil 210 is larger than that of the corrugated section 221 of the second bump foil 220. When the rotor rotates, the rotor generates force on the top foil 300, so that the top foil 300 generates force on the second wave foil 220, the corrugated section 221 of the second wave foil 220 deforms, and when the rotor is in light load, only the second wave foil 220 can complete supporting work, at the moment, the second wave foil 220 is easy to deform due to the fact that the thickness of the second wave foil 220 is small, so that structural damping provided by the whole second wave foil 220 and the top foil 300 is high, energy caused by rotor vibration can be well dissipated, and the running stability of the rotor is guaranteed; when heavy load or impact is applied, the corrugated section 221 of the second bump foil 220 contacts the first bump foil 210, and the first bump foil 210 and the second bump foil 220 jointly provide a supporting force, so that a large supporting rigidity can be realized, the critical speed of the rotor is increased, and the high-speed operation stability and the impact resistance of the rotor are ensured. In other embodiments, the thickness of the corrugated section 211 of the first bump foil 210 may be smaller than the thickness of the corrugated section 221 of the second bump foil 220. Thus, when the rotor rotates, especially when the rotor is at a low rotation speed, the dynamic pressure gas film is unstable due to the temporary inconspicuous dynamic pressure effect, and the corrugated section 221 of the second wave foil 220 with a larger thickness can bear the fluctuating load of the rotor, so that the formation of the dynamic pressure gas film is ensured more quickly, and the abrasion between the rotor and the top foil 300 is prevented. When the corrugated section 221 of the second bump foil 220 is deformed to contact the corrugated section 211 of the first bump foil 210, the structural strength of the entire bump foil can be improved, which is advantageous for improving the impact resistance.

In some embodiments of the present application, as shown in fig. 6, the first bump foil 210 and the second bump foil 220 are stacked at different thickness positions and spaced apart from each other. The corrugated sections 211 of the first corrugated foil 210 and the corrugated sections 221 of the second corrugated foil 220 are stacked and arranged at intervals, and it is explained that the corrugated sections 221 of the second corrugated foil 220 contact the top foil 300, that is, the mounting base 100, the first corrugated foil 210, the second corrugated foil 220, and the top foil 300 are arranged in this order from the outside of the mounting base 100 to the inside of the mounting base 100, and when a force is generated on the top foil 300 by the rotor, the top foil 300 transmits the force to the second corrugated foil 220, and the corrugated sections 221 of the second corrugated foil 220 are deformed, and since the corrugated sections 211 of the first corrugated foil 210 and the corrugated sections 221 of the second corrugated foil 220 are arranged at intervals, a space is provided in which the corrugated sections 221 of the second corrugated foil 220 are deformed, so that the second corrugated foil 220 can be supported at the time of light load, and when an impact is heavy or applied, the corrugated sections 221 of the second corrugated foil 220 are deformed to contact the corrugated sections 211 of the first corrugated foil 210, and in this case, the corrugated sections 211 of the first corrugated foil 210 and the second corrugated foil 220 are deformed irreversibly, and the corrugated sections are not deformed.

In some embodiments of the present application, as shown in fig. 6, the connecting segments 222 of the second bump foil 220 and the connecting segments 212 of the first bump foil 210 are arranged correspondingly, and the thickness of the connecting segment 212 of at least one of the first bump foils 210 and the corresponding connecting segment 222 of the second bump foil 220 are not uniform. As mentioned above, the corrugated sections of the first corrugated foil 210 or the second corrugated foil 220 are connected to each other by connecting sections, which can provide good support when the corrugated sections are deformed, and especially when the rotor rotates at a low speed, the connecting sections can effectively support the corrugated sections to prevent the corrugated sections from being deformed to a plane, so that the corrugated sections can effectively bear the wavy load. Further, the connection section 212 of the first bump foil 210 and the connection section 222 of the second bump foil 220 are bonded to each other, and it is described that the second bump foil 220 is in contact with the top foil 300, that is, the mount 100, the first bump foil 210, the second bump foil 220, and the top foil 300 are arranged in this order from the outside of the mount 100 to the inside of the mount 100, and the thickness of the connection section 212 of the first bump foil 210 is larger than that of the connection section 222 of the second bump foil 220. In addition to resisting impact under heavy load, the corrugated section 221 of the second bump foil 220 deforms under light load to push the connecting section 222 of the second bump foil 220 to move, the connecting section 222 of the second bump foil 220 is pressed by the deformation of the corrugated sections on the two sides, and the contact with the connecting section 212 of the first bump foil 210 can occur, so that the damping between the connecting section and the first bump foil 210 is enhanced, the energy of the vibration of the rotor is reduced more effectively, and the rotor reaches the rotational balance more quickly. In other embodiments, the thickness of the connecting section 212 of the first bump foil 210 may be smaller than that of the connecting section 222 of the second bump foil 220, so that, in addition to ensuring that the energy caused by the vibration of the rotor can be well dissipated when the load is light, the connecting section 212 of the first bump foil 210 can support the corrugated section 221 of the second bump foil 220 when the load is heavy, and further, the impact resistance can be improved.

In some embodiments of the present application, as shown in fig. 7, the connecting section 222 of the second bump foil 220 and the corrugated section 211 of the first bump foil 210 are arranged one on top of the other, and the thickness of at least one corrugated section 211 of the first bump foil 210 is different from the thickness of the corresponding connecting section 222 of the second bump foil 220. For example, the mount 100, the first bump foil 210, the second bump foil 220, and the top foil 300 are arranged in order from the outside of the mount 100 to the inside of the mount 100, the corrugated section 211 of the first bump foil 210 and the corrugated section 221 of the second bump foil 220 are arranged in a staggered manner, that is, the connecting section 222 of the second bump foil 220 and the corrugated section 211 of the first bump foil 210 are arranged in a stacked manner, and the corrugated section 221 of the second bump foil 220 and the connecting section 212 of the first bump foil 210 are arranged in a stacked manner. Taking the example that the thickness of the corrugated section 211 of the first wave foil 210 is greater than the thickness of the connecting section corresponding to the second wave foil 220, when the top foil 300 is impacted, the top foil 300 acts on the second wave foil 220, and the connecting section 222 of the second wave foil 220 has a smaller thickness and presses the corrugated section 211 of the first wave foil 210, at this time, the connecting section 222 of the second wave foil 220 provides a certain elastic deformation, and the corrugated section 211 of the first wave foil 210 provides an arched support, so that the damping effect of the two is enhanced, and the vibration caused by the operation of the rotor is favorably dissipated. In other embodiments, the thickness of the corrugated section 211 of the first bump foil 210 may be smaller than the thickness of the corresponding connecting section of the second bump foil 220. Thus, under the same load, due to the greater thickness of the connecting section 222 of the second wave foil 220, when the corrugated section 221 of the second wave foil 220 deforms, the connecting section 222 of the second wave foil 220 can press the corrugated section 211 of the first wave foil 210, and the corrugated section 211 of the first wave foil 210 deforms accordingly, so that the mechanism formed by the first wave foil 210 and the second wave foil 220 can more effectively adjust the shape thereof, thereby maintaining the rigidity and stability of the dynamic pressure gas film.

It is understood that, in the foregoing embodiment, there may be a plurality of cases where the first bump foil 210 and the second bump foil 220 have different thicknesses, for example, the first bump foil 210 has 22 corrugated sections and 22 connecting sections, the second bump foil 220 also has 22 corrugated sections and 22 connecting sections, the first bump foil 210 has 11 corrugated sections and the second bump foil 220 have different thicknesses, and other portions may be selected according to actual situations; alternatively, the thickness of the 11 connecting segments of the first bump foil 210 is different from the thickness of the corresponding corrugated segments of the second bump foil 220, and the other portions may be selected according to actual situations; alternatively, the first bump foil 210 may have 11 bump segments with different thicknesses from the corresponding connecting segments of the second bump foil 220, and the other portions may be selected according to actual conditions. Of course, in some embodiments, all of the corrugated sections and connecting sections of the first bump foil 210 are different from the corrugated sections and connecting sections of the second bump foil 220 in thickness, in order to reduce the design difficulty.

Referring to fig. 8, the present application further provides a rotor assembly 10, where the rotor assembly 10 according to the embodiment of the present application includes a rotor 11 and an air bearing in the foregoing embodiment. By providing the air bearing, the stability of the rotor assembly 10 during operation can be improved.

The rotor assembly 10 may include a radial air bearing 12b, the radial air bearing 12b is sleeved on the periphery of the rotor 11, the radial air bearing 12b is the air bearing 12 according to the foregoing embodiment, and the mounting seat 100, the bump foil and the top foil 300 of the radial air bearing 12b are sequentially stacked from outside to inside along the radial direction of the rotor 11. During use, during rotation of the rotor assembly 10, the top foil 300 will be pushed towards the mounting seat 100 and a gas film will be formed on the surface of the top foil 300, while the top foil 300 will be forced to expand outwards and press against the bump foil 200, and in addition, the bump foil 200 will provide support for the top foil 300 so that there is a suitable distance between the top foil 300 and the rotor 11 to maintain stability of the gas film between the top foil 300 and the rotor 11. Meanwhile, the stable rotation of the rotor 11 can be maintained, and the radial play of the rotor 11 is reduced.

In addition, the rotor assembly 10 may further include an axial air bearing 12a, the axial air bearing 12a is engaged with the rotor 11, the axial air bearing 12a is the air bearing 12 according to the foregoing embodiment, and the mounting seat 100, the bump foil 200 and the top foil 300 of the axial air bearing 12a are sequentially stacked in the axial direction of the rotor 11. During use, during rotation of the rotor assembly 10, the top foil 300 will be pushed towards the mounting seat 100 and a gas film will be formed on the surface of the top foil 300, the top foil 300 will press against the wave foil 200, and in addition, the wave foil 200 will provide support for the top foil 300 so that the top foil 300 and the rotor 11 have a suitable distance therebetween to maintain the stability of the gas film between the top foil 300 and the rotor 11.

The application also provides a compressor, which comprises the air bearing.

The present application further provides a compressor including the aforementioned rotor assembly 10.

The application also provides heating and ventilation equipment which comprises the air bearing.

The present application further provides an hvac apparatus including the aforementioned rotor assembly 10.

The application also provides heating and ventilation equipment which comprises the compressor.

The application provides an air bearing and a rotor assembly, a compressor and a warm-up device of the air bearing, wherein a wave foil and a top foil 300 form an elastic system, so that a rotor is in a dynamic balance when rotating, the wave foil and the top foil 300 can adjust a gap between the top foil 300 and the rotor by changing the shape of the wave foil and the top foil 300 at any time, and then the rotor stably rotates, namely the elastic system formed by the wave foil and the top foil 300 not only needs to support the rotor but also needs to realize certain deformation, but the contradiction exists, so that if the wave foil and the top foil 300 need to realize certain elasticity, the thickness of the wave foil and the top foil 300 cannot be too large, and if the thickness of the wave foil and the top foil 300 is too small, the supporting performance of the wave foil and the top foil 300 can be reduced, and the operation of the rotor is not stable, and the impact resistance is weak. In order to overcome such a problem, the present application is therefore designed by making improvements to the wave foil by dividing the wave foil into at least two bands, namely a first band 201 and a second band 202, with different thicknesses between the two bands.

The air bearing of the embodiment of the present application may be an axial bearing or a radial bearing, and taking the axial bearing as an example, the mounting seat, the bump foil, and the top foil are stacked in an axial direction. Taking a radial bearing as an example, mount pad, ripples foil and top foil cup joint from outside to inside along radial, in radial bearing's use, the pivot can cup joint in a top foil inboard, and the pivot can force a top foil to take place the displacement towards the mount pad at the rotation in-process, and forms the gas film between pivot and top foil, and utilizes the supporting role of ripples foil, can realize the dynamic balance of gas film between pivot and the top foil to improve the pivot and rotate the stability of in-process. In addition, the first corrugated section and the second corrugated section are staggered, so that the supporting uniformity and stability of the first corrugated foil and the second corrugated foil for the top foil can be improved, and the load capacity of the air bearing is improved.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, a first feature is "on" or "under" a second feature such that the first and second features are in direct contact, or the first and second features are in indirect contact via an intermediary. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are exemplary and should not be construed as limiting the present application and that changes, modifications, substitutions and alterations in the above embodiments may be made by those of ordinary skill in the art within the scope of the present application.

Claims (16)

1. The air bearing is characterized by comprising a mounting seat, a wave foil and a top foil which are sequentially stacked, wherein the same wave foil has a first wave band and a second wave band, and the first wave band and the second wave band have different thicknesses.

2. The air bearing as recited in claim 1, wherein the first and second bands are arranged along a circumferential direction of the air bearing.

3. The air bearing as recited in claim 2, wherein at least one of the first and second wavebands comprises a plurality, and the first and second wavebands alternate circumferentially of the air bearing.

4. The air bearing of claim 1, wherein the thickness of the bump foil varies uniformly along a circumferential direction of the air bearing.

5. The air bearing as recited in claim 1, wherein the bump foil has bump segments and land segments, the first bump segment includes at least one of the bump segments and at least one of the land segments, and the second bump segment includes at least one of the bump segments and at least one of the land segments.

6. The air bearing of claim 5, wherein at least one corrugated section of the corrugated foil has a thickness that is different from a thickness of an adjacent connecting section.

7. The air bearing of claim 1, wherein a plurality of wave foils are disposed along an axial direction of the mounting seat, and the first wave bands and the second wave bands are alternately or alternately arranged in the axial direction.

8. The air bearing of any of claims 1-7, wherein a plurality of the wave foils are stacked between the top foil and the mounting cup, at least one of the plurality of wave foils being provided with the first and second wavebands.

9. The airfoil bearing of claim 8, wherein the plurality of bump foils comprises a first bump foil and a second bump foil, the first bump foil having a region of different thickness than a corresponding location on the second bump foil.

10. The airfoil bearing of claim 9, wherein the first and second foils each have a corrugated segment, the corrugated segments of the first foil are stacked with the corrugated segments of the second foil, and at least one corrugated segment of the first foil has a different thickness than a corresponding corrugated segment of the second foil.

11. The airfoil bearing of claim 9, wherein the first and second bump foils each have a connecting segment, the connecting segment of the first bump foil is laminated to the connecting segment of the second bump foil, and at least one connecting segment of the first bump foil has a thickness that is different than a thickness of a corresponding connecting segment of the second bump foil.

12. The airfoil bearing of claim 9, wherein the first and second foils each have a corrugated section and a connecting section, the corrugated section of the first foil being stacked with the connecting section of the second foil, and at least one corrugated section of the first foil having a different thickness than a corresponding connecting section of the second foil.

13. The air bearing as recited in any one of claims 1 to 7, wherein the air bearing is a radial air bearing or an axial air bearing.

14. A rotor assembly, the rotor assembly comprising a rotor, the rotor assembly further comprising:

the radial air bearing is sleeved on the periphery of the rotor, the radial air bearing is the air bearing according to any one of claims 1 to 12, and the mounting seat, the wave foil and the top foil of the radial air bearing are sequentially laminated from outside to inside along the radial direction of the rotor; and/or

An axial air bearing cooperating with the rotor, the axial air bearing being as claimed in any one of claims 1 to 12, the mount, the bump foil and the top foil of the axial air bearing being stacked in sequence in an axial direction of the rotor.

15. A compressor comprising the air bearing according to any one of claims 1 to 13; or comprising a rotor assembly according to claim 14.

16. Heating and ventilation device, characterized in that it comprises an air bearing according to any one of claims 1 to 13; or comprising a rotor assembly according to claim 14; or comprising a compressor according to claim 15.

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