CN113606246A - Radial gas foil bearing, air compressor, automobile and aircraft - Google Patents
Radial gas foil bearing, air compressor, automobile and aircraft Download PDFInfo
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- CN113606246A CN113606246A CN202110986562.8A CN202110986562A CN113606246A CN 113606246 A CN113606246 A CN 113606246A CN 202110986562 A CN202110986562 A CN 202110986562A CN 113606246 A CN113606246 A CN 113606246A
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- 239000011888 foil Substances 0.000 title claims abstract description 116
- 239000002184 metal Substances 0.000 claims abstract description 11
- 230000002829 reductive effect Effects 0.000 claims description 9
- 230000003247 decreasing effect Effects 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 74
- 230000000694 effects Effects 0.000 description 7
- 238000005461 lubrication Methods 0.000 description 7
- 230000005484 gravity Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000001133 acceleration Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
- F16C17/024—Sliding-contact bearings for exclusively rotary movement for radial load only with flexible leaves to create hydrodynamic wedge, e.g. radial foil bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
- F16C33/1005—Construction relative to lubrication with gas, e.g. air, as lubricant
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Support Of The Bearing (AREA)
Abstract
The invention discloses a radial gas foil bearing, an air compressor, an automobile and an airplane, relates to the technical field of gas foil bearings, and solves the problem that the radial gas foil bearing is insufficient in local rigidity under the operation condition with large impact in the prior art. The radial gas foil bearing comprises a bearing shell, an elastic supporting metal wire mesh and a supporting top foil, wherein the supporting top foil is positioned on the inner side of the bearing shell, the elastic supporting metal wire mesh is positioned between the bearing shell and the supporting top foil, the elastic supporting metal wire mesh is provided with a plurality of groups of elastic supporting units along the circumferential direction and the axial direction of the bearing, and the elastic supporting units comprise a plurality of supporting beams with different lengths. The radial gas foil bearing has the advantages of high operation precision, high stability and reliability and wide operation working condition.
Description
Technical Field
The invention relates to the technical field of gas foil bearings, in particular to a radial gas foil bearing, an air compressor comprising the radial gas foil bearing, and an automobile and an airplane using the air compressor.
Background
The gas lubrication bearing is a bearing using gas as a lubrication medium, and the principle of the gas lubrication bearing is that fluid forms a film under the action of external pressure to support external loads. At present, gas lubricated bearings can be classified into dynamic pressure gas bearings, static pressure gas bearings and squeeze type gas bearings according to the difference in the generation process of a lubricating gas film. The gas lubrication technology has been developed rapidly in the last 50 century, the appearance of the gas lubrication technology greatly enriches the types of lubricated bearings, particularly under the working conditions of simple structure, less required transmission parts and high rotating speed, the traditional oil-lubricated sliding bearing is easy to expose the problems of overhigh energy consumption, low linear speed, insufficient stability and the like, and the gas-lubricated bearing is often selected as an ideal substitute of the traditional oil-lubricated bearing by virtue of the characteristics of high rotating speed, high precision, high reliability, oil-free lubrication, low friction loss and capability of working in a high-temperature environment, particularly in the technical field of ultra-high-speed rotating machinery, and has a very wide application prospect.
However, the current dynamic pressure gas bearing or static pressure gas bearing has certain limitations in the use process, and can not meet the requirements of some complex and severe working conditions under most conditions. For example, in a conventional dynamic pressure gas bearing, a wedge effect is generated by a wedge-shaped space formed between a rotor and a bearing surface, and the speed of the rotor is continuously increased, and ambient gas is continuously dragged into the wedge-shaped space due to the viscosity of the gas, so that the pressure in the wedge-shaped space is continuously increased, a dynamic pressure gas film can be formed when the rotational speed of the bearing reaches a certain value, and a stable gas lubrication state is entered, and the higher the rotational speed is, the higher the bearing capacity of the bearing is. However, under some severe operating conditions with large impact, such as a dynamic pressure bearing used in an aircraft air cycle machine and a gas foil bearing used in a vehicle fuel cell air compressor used in a hydrogen energy fuel vehicle, due to the impact of the super-large gravity acceleration in the acceleration process of the aircraft and the instantaneous large acceleration caused by the change along with road conditions in the operation process of the vehicle, the positions of a top foil and a wave foil at the contact part of the traditional dynamic pressure foil bearing and a rotor are subjected to the large impact force which is several times or even tens of times of the gravity of the rotor instantly, so that the wave foil of the dynamic pressure gas foil bearing is subjected to severe plastic deformation, the fit clearance between the rotor and the bearing is further influenced, and the operation precision and the reliability of the gas bearing are directly and rapidly reduced.
The prior art discloses a gas foil radial bearing, which has two layers of elastic support foils, wherein the two layers of elastic support foils comprise a plurality of elastic small pieces with gradually changed sizes, and specifically, the sizes of the elastic small pieces are gradually increased from two ends of the elastic support foils to the middle of the elastic support foils. The gas foil radial bearing has the advantages that the elastic small pieces with gradually changed sizes enable the middle of the elastic supporting foil piece to have higher rigidity, and accordingly the deformation degree of the elastic small pieces in the middle and at two ends is consistent. Although the overall deformation degree of the elastic support foil is consistent, the defect of insufficient rigidity exists in local parts of the elastic support foil, such as two ends of the elastic support foil, under the operation working condition with large impact, and the operation precision and reliability of the radial bearing of the gas foil are extremely easily reduced sharply.
Disclosure of Invention
One of the objectives of the present invention is to provide a radial gas foil bearing, which solves the technical problem of the prior art that the radial gas foil bearing has insufficient local rigidity under the operation condition with large impact. The various technical effects that can be produced by the preferred technical solution of the present invention are described in detail below.
In order to achieve the purpose, the invention provides the following technical scheme:
the radial gas foil bearing comprises a bearing shell, an elastic supporting metal wire mesh and a supporting top foil, wherein the supporting top foil is positioned on the inner side of the bearing shell, the elastic supporting metal wire mesh is positioned between the bearing shell and the supporting top foil, a plurality of groups of elastic supporting units are arranged on the elastic supporting metal wire mesh along the circumferential direction and the axial direction of the bearing, and each elastic supporting unit comprises a plurality of supporting beams with different lengths.
According to a preferred embodiment, in the circumferential direction of the bearing, the gradual trend of the lengths of the support beams of two adjacent groups of the elastic support units is opposite, and in the axial direction of the bearing, the gradual trend of the lengths of the support beams of two adjacent groups of the elastic support units is the same and/or opposite.
According to a preferred embodiment, in the circumferential direction of the bearing, the length changes of the supporting beams of two adjacent groups of elastic supporting units are respectively increased and decreased in sequence, and in the axial direction of the bearing, the length changes of the supporting beams of two adjacent groups of elastic supporting units are both increased or decreased in sequence; or in the circumferential direction of the bearing, the length changes of the supporting beams of the two adjacent groups of elastic supporting units are respectively reduced and increased in sequence, and in the axial direction of the bearing, the length changes of the supporting beams of the two adjacent groups of elastic supporting units are reduced or increased in sequence.
According to a preferred embodiment, the elastic support unit includes a first support beam, a second support beam, and a third support beam, and the first support beam, the second support beam, and the third support beam are spaced apart and sequentially increased in length.
According to a preferred embodiment, the length difference between the first support beam, the second support beam and the third support beam is 1-3 mm.
According to a preferred embodiment, the widths of the first, second and third support beams are the same, and the widths of the first, second and third support beams are 0.8 to 1.5 mm.
According to a preferred embodiment, at least ten groups of the elastic supporting units are uniformly distributed on the elastic supporting wire mesh along the circumferential direction of the bearing, and at least four groups of the elastic supporting units are uniformly distributed on the elastic supporting wire mesh along the axial direction of the bearing.
According to a preferred embodiment, the resilient supporting wire mesh is of one-piece construction and the supporting top foil is of one-piece construction.
According to a preferred embodiment, a wire groove is provided inside the bearing housing, the elastic support wire mesh and the support top foil are located within the wire groove, and a width of the wire groove in a bearing radial direction is larger than a sum of thicknesses of the elastic support wire mesh and the support top foil.
According to a preferred embodiment, the width of the wire groove in the radial direction of the bearing is 0.3 to 0.5mm greater than the sum of the thicknesses of the elastic supporting wire mesh and the supporting top foil.
Another object of the invention is to propose an air compressor, a car and an aircraft, which improve the performance of existing air compressors, cars and aircraft.
The air compressor comprises the radial gas foil bearing according to any one of the technical schemes of the invention.
The automobile comprises the air compressor in any technical scheme of the invention.
The aircraft comprises the air compressor according to any one of the technical schemes.
The radial gas foil bearing, the air compressor, the automobile and the airplane provided by the invention at least have the following beneficial technical effects:
the radial gas foil bearing of the invention replaces the traditional supporting wave foil by the elastic supporting wire mesh, the elastic supporting wire mesh is composed of a plurality of groups of elastic supporting units, each elastic supporting unit comprises a plurality of supporting beams with different lengths, when in work, one group of supporting beams with the longest length preferentially deform, when the pressure given by a rotor continuously increases, the supporting beams with the shortest length sequentially deform, and the supporting beams with the shortest length finally deform, because the length of each group of beams is shorter, each group of beams has high bending strength, the elastic supporting units can be ensured to still only elastically deform under larger load, thereby when the radial gas foil bearing works in huge impact and strong gravity field, the elastic supporting wire mesh still only elastically deforms, when strong impact disappears or the gravity field returns to normal, the elastic supporting wire mesh is restored to the original position, the size of the bearing is still kept normal, and the gas foil bearing is not abnormal in operation due to the fact that the permanent plastic deformation of the metal bump foil can happen. Secondly, because the load is different, the action order of each supporting beam in the elastic supporting unit is different, so that the radial gas foil bearing keeps variable rigidity in the axial direction and the radial direction, the overall rigidity of the elastic supporting wire mesh is uniformly distributed, a wedge-shaped gas film is easily formed, and the stability and the reliability of the working operation of the radial gas foil bearing and the width of the operation working condition are greatly guaranteed. Thirdly, because the elastic support wire mesh is provided with a plurality of groups of elastic support units along the circumferential direction and the axial direction of the bearing, the rigidity of each group of elastic support units is consistent, thereby further enabling the integral rigidity of the elastic support wire mesh to be uniformly distributed, and the radial gas foil bearing can keep enough rigidity everywhere under the operating condition with larger impact, thereby further ensuring the stable reliability of the working operation of the radial gas foil bearing and the width of the operating condition. The radial gas foil bearing solves the technical problem that the radial gas foil bearing has insufficient local rigidity under the operation condition with larger impact in the prior art.
The air compressor comprises the radial gas foil bearing in any technical scheme, and the radial gas foil bearing has the advantages of high operation precision, high stability and reliability and wide operation working condition, so that the performance of the air compressor can be improved, and the application field of the air compressor is expanded.
The automobile comprises the air compressor in any technical scheme, and the performance of the air compressor is improved, so that the performance of the automobile can be improved.
The aircraft comprises the air compressor in any technical scheme, and the performance of the air compressor is improved, so that the performance of the aircraft can be improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is an exploded view of a preferred embodiment of the radial gas foil bearing of the present invention;
FIG. 2 is a schematic view of the overall structure of a preferred embodiment of the radial gas foil bearing of the present invention;
FIG. 3 is a partial schematic structural view of a preferred embodiment of the radial gas foil bearing of the present invention;
FIG. 4 is an expanded view of a preferred embodiment of the resiliently supported wire mesh of the present invention;
FIG. 5 is a schematic view of a third support beam of the present invention deformed by a force;
FIG. 6 is a schematic view of the second support beam and the third support beam of the present invention deformed by force.
In the figure: 10. a bearing housing; 101. a wire slot; 20. elastically supporting the wire net; 201. an elastic support unit; 2011. a first support beam; 2012. a second support beam; 2013. a third support beam; 30. supporting the top foil.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The radial gas foil bearing, the air compressor, the automobile and the airplane according to the present invention will be described in detail with reference to the accompanying drawings 1 to 6 and examples 1 to 4 of the specification.
Example 1
This example describes the radial gas foil bearing of the present invention in detail.
The radial gas foil bearing of the present embodiment includes a bearing housing 10, an elastic supporting wire mesh 20 and a supporting top foil 30, wherein the supporting top foil 30 is located inside the bearing housing 10, and the elastic supporting wire mesh 20 is located between the bearing housing 10 and the supporting top foil 30, as shown in fig. 1 to 3. Preferably, the elastic supporting wire net 20 is provided with a plurality of sets of elastic supporting units 201 in both circumferential and axial directions of the bearing, and the elastic supporting units 201 include a plurality of supporting beams having different lengths. The circumferential direction of the bearing in this embodiment is the length direction of the expanded elastic supporting wire mesh 20, or the transverse direction of the expanded elastic supporting wire mesh 20, as shown in fig. 4; the axial direction of the bearing in this embodiment is the width direction of the expanded elastic supporting wire mesh 20, or the vertical direction of the expanded elastic supporting wire mesh 20, as shown in fig. 4.
The radial gas foil bearing of the embodiment replaces the traditional supporting wave foil by the elastic supporting wire mesh 20, the elastic supporting wire mesh 20 is composed of a plurality of groups of elastic supporting units 201, each elastic supporting unit 201 comprises a plurality of supporting beams with different lengths, when the radial gas foil bearing works, a group of supporting beams with the longest length preferentially deform, when the pressure given by a rotor continuously increases, the supporting beams with the successively reduced lengths deform, and the supporting beam with the shortest length finally deforms, because the length of each group of beams is shorter, each group of beams has high bending strength, the elastic supporting unit 201 can be ensured to still only elastically deform under a larger load, thereby when the radial gas foil bearing works in a huge impact and strong gravity field, the elastic supporting wire mesh 20 still only elastically deforms, when the strong impact disappears or the gravity field returns to normal, the resiliently supported wire mesh 20 is restored to its original position and the bearing size is maintained normal, rather than the gas foil bearing operating abnormally as permanent plastic deformation of the metal bump foil may occur. Secondly, because the load is different, the action sequence of each supporting beam in the elastic supporting unit 201 is different, so that the radial gas foil bearing keeps variable rigidity in the axial direction and the radial direction, the overall rigidity of the elastic supporting wire mesh 20 is uniformly distributed, a wedge-shaped gas film is easily formed, and the stability and the reliability of the working operation of the radial gas foil bearing and the breadth of the operation working condition are greatly guaranteed. Thirdly, as the elastic supporting wire mesh 20 is provided with a plurality of groups of elastic supporting units 201 along the circumferential direction and the axial direction of the bearing, the rigidity of each group of elastic supporting units 201 is consistent, thereby further enabling the integral rigidity of the elastic supporting wire mesh 20 to be uniformly distributed, and under the operating condition of the radial gas foil bearing with large impact, all parts of the elastic supporting wire mesh 20 can keep enough rigidity, thereby further ensuring the stable reliability of the working operation and the breadth of the operating condition of the radial gas foil bearing. The radial gas foil bearing of the embodiment solves the technical problem that the radial gas foil bearing has insufficient local rigidity under the operation condition with large impact in the prior art.
According to a preferred embodiment, the support beam length gradient trends of the two adjacent groups of elastic support units 201 are opposite in the circumferential direction of the bearing, and the support beam length gradient trends of the two adjacent groups of elastic support units 201 are the same and/or opposite in the axial direction of the bearing. Preferably, in the circumferential direction of the bearing, the gradual change trends of the lengths of the support beams of the two adjacent groups of elastic support units 201 are opposite, and in the axial direction of the bearing, the gradual change trends of the lengths of the support beams of the two adjacent groups of elastic support units 201 are the same. More preferably, in the circumferential direction of the bearing, the supporting beam length changes of the two adjacent groups of elastic supporting units 201 are respectively increased and decreased sequentially, and in the axial direction of the bearing, the supporting beam length changes of the two adjacent groups of elastic supporting units 201 are both increased sequentially or both decreased sequentially. Or in the circumferential direction of the bearing, the length changes of the supporting beams of the two adjacent groups of elastic supporting units 201 are respectively reduced and increased in sequence, and in the axial direction of the bearing, the length changes of the supporting beams of the two adjacent groups of elastic supporting units 201 are reduced or increased in sequence.
In the radial gas foil bearing of the preferred technical scheme of this embodiment, in the circumferential direction of the bearing, the support beam length gradual change trends of the two adjacent groups of elastic support units 201 are opposite, in the axial direction of the bearing, the support beam length gradual change trends of the two adjacent groups of elastic support units 201 are the same, that is, the support beams with different lengths are arranged in a cross manner, so that the overall rigidity of the elastic support wire mesh 20 is uniformly distributed, and under the operating condition with large impact, all parts of the elastic support wire mesh 20 can keep enough rigidity, thereby further ensuring the stable reliability of the working operation of the radial gas foil bearing and the width of the operating condition.
According to a preferred embodiment, the elastic support unit 201 comprises a first support beam 2011, a second support beam 2012 and a third support beam 2013, wherein the first support beam 2011, the second support beam 2012 and the third support beam 2013 are arranged at intervals and have successively increasing lengths, as shown in fig. 4. Preferably, the length difference between the adjacent first supporting beam 2011, the second supporting beam 2012 and the third supporting beam 2013 is 1-3 mm. Preferably, the widths of the first support beam 2011, the second support beam 2012 and the third support beam 2013 are the same, and the widths of the first support beam 2011, the second support beam 2012 and the third support beam 2013 are 0.8-1.5 mm. Preferably, the widths of the first support beam 2011, the second support beam 2012 and the third support beam 2013 may be different, and the support beams with different widths may have different rigidities. Specifically, when the support beam works, the smaller the width and the longer the length of the support beam are, the deformation is preferentially generated; the wider the width and shorter the length of the support beam, the later the deformation occurs.
The elastic support unit 201 in the preferred technical scheme of this embodiment includes a first support beam 2011, a second support beam 2012 and a third support beam 2013, the first support beam 2011, the second support beam 2012 and the third support beam 2013 are arranged at intervals and sequentially increased in length, when the radial gas foil bearing works, the third support beam 2013 with the longest length preferentially deforms, and at this time, the first support beam 2011 and the second support beam 2012 do not deform and do not contact with the bearing housing 10, so that a support effect can be achieved, and a wedge-shaped gas film is easily formed, so that the stability and reliability of the radial gas foil bearing in working operation are greatly guaranteed, specifically as shown in fig. 5; when the pressure given by the rotor continues to increase or the rotor is subjected to a large impact force, the second support beam 2012 deforms successively, the first support beam 2011 does not deform and is not in contact with the bearing shell 10, so that the support effect can be achieved, a wedge-shaped gas film is easy to form, and the stability and reliability of the operation of the radial gas foil bearing can be greatly guaranteed, as shown in fig. 6 specifically; when the load or the impact force continues to be enhanced, the first support beam 2011, the second support beam 2012 and the third support beam 2013 are elastically deformed, at the moment, the first support beam 2011, the second support beam 2012 and the third support beam 2013 are tightly attached to the inner surface of the bearing shell 10, and when the load or the impact force disappears, the first support beam 2011, the second support beam 2012 and the third support beam 2013 are elastically deformed, so that the elastic support wire mesh 20 can be quickly rebounded to restore the original structure, the elastic support wire mesh 20 is restored to the original position, and the size of the bearing is still kept normal.
Without being limited thereto, the elastic support unit 201 of the preferred embodiment may only include two support beams with different lengths, or may include at least four support beams with different lengths.
According to a preferred embodiment, at least ten sets of elastic supporting units 201 are uniformly arranged along the circumferential direction of the bearing on the elastic supporting wire net 20, and at least four sets of elastic supporting units 201 are uniformly arranged along the axial direction of the bearing on the elastic supporting wire net 20. Without being limited thereto, the elastic support wire mesh 20 may be uniformly distributed with the rest number of the elastic support units 201 along the circumferential direction of the bearing, and the elastic support wire mesh 20 may be uniformly distributed with the rest number of the elastic support units 201 along the axial direction of the bearing, depending on the application environment of the radial gas foil bearing. It can be known that the greater the number of the elastic supporting units 201 provided on the elastic supporting wire net 20, the higher the degree of uniformity of the rigidity distribution of the elastic supporting wire net 20.
According to a preferred embodiment, the resilient supporting wire mesh 20 is a one-piece structure and the supporting top foil 30 is a one-piece structure, as shown in fig. 1. The elastic supporting wire mesh 20 and the supporting top foil 30 of the preferred technical scheme of the embodiment are both of an integrated structure, so that the radial gas foil bearing is simple in overall structure and high in reliability.
According to a preferred embodiment, the bearing housing 10 is provided with a raceway 101 inside, and the elastic supporting wire mesh 20 and the supporting top foil 30 are located inside the raceway 101, as shown in fig. 1 to 3. Preferably, the width of the wire groove 101 in the radial direction of the bearing is larger than the sum of the thicknesses of the elastic support wire net 20 and the support top foil 30. More preferably, the width of the wire groove 101 in the radial direction of the bearing is 0.3 to 0.5mm larger than the sum of the thicknesses of the elastic support wire net 20 and the support top foil 30.
The elastic supporting wire mesh 20 and the supporting top foil 30 of the preferred technical scheme of this embodiment are simultaneously located in the wire groove 101, the width of the wire groove 101 in the radial direction of the bearing is greater than the sum of the thicknesses of the elastic supporting wire mesh 20 and the supporting top foil 30, two end portions of the elastic supporting wire mesh 20 and the supporting top foil 30 are free ends, and self-pretension can be generated through the bending back tension of the elastic supporting wire mesh 20 and the supporting top foil 30, so that a pretensioning effect is generated between the elastic supporting wire mesh 20 and the supporting top foil 30, and the pretensioning effect is tightly attached to the inner wall of the bearing shell 10. The radial gas foil bearing with the structure has excellent rigidity and damping in the high-speed operation process, can effectively prevent self-excited vibration generated by a rotor in the high-speed operation process, and improves the high-speed stability of the bearing.
Example 2
This embodiment will explain the air compressor of the present invention in detail.
The air compressor of this embodiment includes the radial gas foil bearing according to any one of embodiments 1. The rest of the structure of the air compressor of this embodiment can be the same as the prior art, and is not described herein again. The air compressor of this embodiment, including the radial gas foil bearing of any one of technical solutions in embodiment 1, because the radial gas foil bearing has the advantages of high operation precision, high stability and reliability, and wide operating condition, the performance of the air compressor can be improved, and the application field of the air compressor can be expanded.
Example 3
This example will explain the automobile of the present invention in detail.
The automobile of this embodiment includes the air compressor of any one of the technical solutions of embodiment 2. The rest of the structure of the vehicle of this embodiment may be the same as the prior art, and will not be described herein. The vehicle of the present embodiment is, for example, a hydrogen energy vehicle. The automobile of this embodiment, including the air compressor of any one of embodiment 2 technical scheme, because air compressor performance promotes to can improve the performance of automobile.
Example 4
This embodiment describes the aircraft of the present invention in detail.
The aircraft of this embodiment includes the air compressor of any one of embodiment 2. The rest of the structure of the aircraft of this embodiment can be the same as the prior art, and is not described herein again. The aircraft of this embodiment, including the air compressor of any one of embodiment 2 technical scheme, because air compressor performance improves to can improve the performance of aircraft.
In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (13)
1. The radial gas foil bearing is characterized by comprising a bearing shell (10), an elastic supporting metal wire mesh (20) and a supporting top foil (30), wherein the supporting top foil (30) is positioned on the inner side of the bearing shell (10), the elastic supporting metal wire mesh (20) is positioned between the bearing shell (10) and the supporting top foil (30), a plurality of groups of elastic supporting units (201) are arranged on the elastic supporting metal wire mesh (20) along the circumferential direction and the axial direction of the bearing, and the elastic supporting units (201) comprise a plurality of supporting beams with different lengths.
2. Radial gas foil bearing according to claim 1, wherein the support beam length progression tendencies of two adjacent groups of said elastic support units (201) are opposite in the circumferential direction of the bearing, and the support beam length progression tendencies of two adjacent groups of said elastic support units (201) are the same and/or opposite in the axial direction of the bearing.
3. The radial gas foil bearing of claim 2, wherein the supporting beam length variations of two adjacent sets of said elastic supporting units (201) are sequentially increasing and sequentially decreasing in the circumferential direction of the bearing, respectively, and the supporting beam length variations of two adjacent sets of said elastic supporting units (201) are sequentially increasing or sequentially decreasing in the axial direction of the bearing; or is
In the circumferential direction of the bearing, the lengths of the supporting beams of the elastic supporting units (201) are adjacent to each other and are respectively reduced and increased in sequence, and in the axial direction of the bearing, the lengths of the supporting beams of the elastic supporting units (201) are adjacent to each other and are reduced or increased in sequence.
4. Radial gas foil bearing according to any of claims 1 to 3, wherein the resilient support unit (201) comprises a first support beam (2011), a second support beam (2012) and a third support beam (2013), the first support beam (2011), the second support beam (2012) and the third support beam (2013) being spaced apart and increasing in length in sequence.
5. The radial gas foil bearing of claim 4, wherein the difference in length between adjacent ones of the first support beam (2011), the second support beam (2012), and the third support beam (2013) is 1-3 mm.
6. The radial gas foil bearing according to claim 4, wherein the first support beam (2011), the second support beam (2012) and the third support beam (2013) have the same width, and the first support beam (2011), the second support beam (2012) and the third support beam (2013) have a width of 0.8-1.5 mm.
7. The radial gas foil bearing of claim 1, wherein the resilient supporting wire mesh (20) is provided with at least ten sets of the resilient supporting units (201) evenly distributed along a circumferential direction of the bearing, and wherein the resilient supporting wire mesh (20) is provided with at least four sets of the resilient supporting units (201) evenly distributed along an axial direction of the bearing.
8. The radial gas foil bearing of claim 1, wherein the resilient supporting wire mesh (20) is of one-piece construction and the supporting top foil (30) is of one-piece construction.
9. Radial gas foil bearing according to claim 1, wherein a raceway (101) is provided inside the bearing housing (10), the resilient supporting wire mesh (20) and the supporting top foil (30) being located within the raceway (101), and the raceway (101) having a width in the bearing radial direction which is larger than the sum of the thicknesses of the resilient supporting wire mesh (20) and the supporting top foil (30).
10. The radial gas foil bearing of claim 9, wherein the width of the wire groove (101) in the radial direction of the bearing is 0.3-0.5 mm greater than the sum of the thicknesses of the elastic supporting wire mesh (20) and the supporting top foil (30).
11. An air compressor comprising the radial gas foil bearing of any one of claims 1 to 10.
12. An automobile comprising the air compressor of claim 11.
13. An aircraft comprising the air compressor of claim 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110986562.8A CN113606246A (en) | 2021-08-26 | 2021-08-26 | Radial gas foil bearing, air compressor, automobile and aircraft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110986562.8A CN113606246A (en) | 2021-08-26 | 2021-08-26 | Radial gas foil bearing, air compressor, automobile and aircraft |
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| Publication Number | Publication Date |
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| CN113606246A true CN113606246A (en) | 2021-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110986562.8A Pending CN113606246A (en) | 2021-08-26 | 2021-08-26 | Radial gas foil bearing, air compressor, automobile and aircraft |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114198390A (en) * | 2021-12-16 | 2022-03-18 | 中车株洲电机有限公司 | Radial foil air bearing |
| CN115507121A (en) * | 2022-10-14 | 2022-12-23 | 势加透博(成都)科技有限公司 | Elastic foil, air bearing and air compressor |
-
2021
- 2021-08-26 CN CN202110986562.8A patent/CN113606246A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114198390A (en) * | 2021-12-16 | 2022-03-18 | 中车株洲电机有限公司 | Radial foil air bearing |
| CN115507121A (en) * | 2022-10-14 | 2022-12-23 | 势加透博(成都)科技有限公司 | Elastic foil, air bearing and air compressor |
| CN115507121B (en) * | 2022-10-14 | 2024-02-13 | 势加透博(成都)科技有限公司 | Elastic foil, air bearing and air compressor |
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