CN114198390A - Radial foil air bearing - Google Patents
Radial foil air bearing Download PDFInfo
- Publication number
- CN114198390A CN114198390A CN202111545415.3A CN202111545415A CN114198390A CN 114198390 A CN114198390 A CN 114198390A CN 202111545415 A CN202111545415 A CN 202111545415A CN 114198390 A CN114198390 A CN 114198390A
- Authority
- CN
- China
- Prior art keywords
- wire mesh
- bearing
- foil
- radial foil
- metal wire
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
Abstract
The invention discloses a radial foil air bearing, which comprises a bearing sleeve and a thick top layer foil coaxially arranged in the bearing sleeve, wherein a metal wire mesh is filled in an annular gap between the bearing sleeve and the thick top layer foil, the metal wire mesh extends along the circumferential direction, the head end of the metal wire mesh in the circumferential direction is fixedly connected with the bearing sleeve, and the tail end of the metal wire mesh in the circumferential direction is in a free state. The damping of the bearing is improved through the wire mesh, the bearing is not prone to plastic deformation when heavy load and impact load are received, the bearing capacity, impact resistance and reliability are guaranteed, the damping of the bearing can be adjusted quickly through adjusting the multilayer axial and circumferential distribution of the wire mesh, redesign is avoided, the wire mesh can be used directly after being cut, complex processing is not needed, and the processing cost is reduced.
Description
Technical Field
The invention relates to the field of air bearings, in particular to a radial foil air bearing.
Background
The foil air-floating bearing is a widely used gas dynamic pressure bearing, adopts gas as a lubricating medium, is mainly applied to the high-speed rotating machinery industry, and consists of a bearing sleeve, an elastic supporting structure, a top foil and other parts. Compared with the traditional rolling bearing and sliding bearing, the foil air-floating bearing adopts gas as a lubricating medium, has the advantages of high rotating speed, low friction, oil-free lubrication, wide applicable temperature range and the like, and has wide application prospect in high-speed rotating machinery, such as an air compressor for a fuel cell, an air blower for a sewage treatment plant, a micro gas turbine, a waste heat recovery generator and the like.
However, the conventional foil air bearing mainly adopts a bump foil as an elastic supporting structure, and mainly has the following problems: the bearing capacity and the impact resistance are poor, the damping of the bearing is small, and the bearing is easy to generate plastic deformation under heavy load and impact load, so that the service life of the bearing is shortened. The design cost of the damping is high, the damping of the bearing is determined by the size of the corrugated foil, and in order to obtain bearings with different damping, only the corrugated size can be redesigned, and a plurality of sets of stamping dies can be processed. The bearing processing cost is high, the processing technology is complex, and the wave foil is generally subjected to processes such as wire cutting, punch forming, heat treatment and the like.
Therefore, how to provide a radial foil air bearing which overcomes the above problems is a technical problem which needs to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a radial foil air bearing, which improves the damping of the bearing and ensures the bearing capacity, impact resistance and reliability by filling a metal wire mesh as an elastic supporting structure.
In order to solve the technical problem, the invention provides a radial foil air bearing which comprises a bearing sleeve and a thick top layer foil coaxially arranged in the bearing sleeve, wherein a metal wire mesh is filled in an annular gap between the bearing sleeve and the thick top layer foil, the metal wire mesh extends along the circumferential direction, the head end of the metal wire mesh in the circumferential direction is fixedly connected with the bearing sleeve, and the tail end of the metal wire mesh in the circumferential direction is in a free state.
Preferably, the inner side and the outer side of the metal wire mesh are both attached with protective foils.
Preferably, an axially extending mounting groove is formed in the inner side of the bearing bush, a radially extending flange is outwardly turned at the head end of the metal wire mesh in the circumferential direction, and the flange is inserted into the mounting groove.
Preferably, the bearing bush inside is provided with a plurality of along the circumferencial direction a plurality of the mounting groove arranges in proper order, the multistage wire mesh along the circumferencial direction install in the mounting groove in proper order, be curved multistage wire mesh splices end to end in proper order and is complete ring structure, and each wire mesh syntropy extends.
Preferably, a plurality of the metal wire nets are sequentially arranged and spliced along the axial direction.
Preferably, three mounting grooves are uniformly distributed on the inner side of the bearing sleeve, and four wire meshes are arranged in parallel in the same mounting groove along the axial direction.
Preferably, the thickness of the thick top foil is 1mm to 4mm, and the thickness of the protective foil is 0.05mm to 0.2 mm.
Preferably, the metal wire mesh is of a multilayer mesh surface fitting structure.
Preferably, the meshes of the wire mesh are square holes, rhombic holes or hexagonal holes.
Preferably, the metal wires of the metal wire mesh are steel wires or copper wires, the diameter of each metal wire is 0.03mm to 1mm, and the side length of each mesh hole of the metal wire mesh is 0.03mm to 5 mm.
The invention provides a radial foil air bearing which comprises a bearing sleeve and a thick top layer foil coaxially arranged in the bearing sleeve, wherein a metal wire mesh is filled in an annular gap between the bearing sleeve and the thick top layer foil, the metal wire mesh extends along the circumferential direction, the head end of the metal wire mesh in the circumferential direction is fixedly connected with the bearing sleeve, and the tail end of the metal wire mesh in the circumferential direction is in a free state.
The damping of the bearing is improved through the wire mesh, the bearing is not prone to plastic deformation when heavy load and impact load are received, the bearing capacity, impact resistance and reliability are guaranteed, the damping of the bearing can be adjusted quickly through adjusting the multilayer axial and circumferential distribution of the wire mesh, redesign is avoided, the wire mesh can be used directly after being cut, complex processing is not needed, and the processing cost is reduced.
Drawings
FIG. 1 is a schematic cross-sectional view of one embodiment of a radial foil air bearing provided by the present invention;
FIG. 2 is a schematic diagram of a bearing sleeve of an embodiment of the radial foil air bearing provided by the present invention;
FIG. 3 is a schematic diagram of a thick top foil in an embodiment of the radial foil air bearing provided by the present invention;
FIG. 4 is an expanded view of a wire mesh in an embodiment of the radial foil air bearing provided by the present invention;
FIG. 5 is a schematic view of the circumferential distribution of wire mesh in one embodiment of the radial foil air bearing provided by the present invention;
FIG. 6 is a schematic view of the axial distribution of the wire mesh in one embodiment of the radial foil air bearing provided by the present invention.
Detailed Description
The core of the invention is to provide a radial foil air bearing, and the radial foil air bearing improves the damping of the bearing and ensures the bearing capacity, the impact resistance and the reliability by filling a metal wire mesh as an elastic supporting structure.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 4, fig. 1 is a schematic cross-sectional view of a radial foil air bearing according to an embodiment of the present invention; FIG. 2 is a schematic diagram of a bearing sleeve of an embodiment of the radial foil air bearing provided by the present invention; FIG. 3 is a schematic diagram of a thick top foil in an embodiment of the radial foil air bearing provided by the present invention; fig. 4 is an expanded view of a metal mesh in an embodiment of the radial foil air bearing provided by the present invention.
The invention provides a radial foil air bearing, which comprises a bearing sleeve 1 and a thick top foil 2 coaxially arranged in the bearing sleeve 1, wherein the bearing sleeve 1 and the thick top foil 2 are both of hollow sleeve structures, the position of the bearing sleeve 1 is fixed, the thick top foil 2 extends into a central hole of the bearing sleeve 1, a rotating shaft extends into the central hole of the thick top foil 2, an annular gap is formed between the bearing sleeve 1 and the thick top foil 2, a metal wire mesh 3 is filled in the annular gap, the metal wire mesh 3 extends along the circumferential direction, the integral structure is annular and is matched with the structural size of the annular gap, a long metal wire mesh is bent into an arc shape during processing, the head end and the tail end of the metal wire mesh 3 are connected with the bearing sleeve 1, and the tail end of the metal wire mesh 3 in the circumferential direction is in a free state. The wire mesh 3 is a wire with a certain diameter processed by metal materials, and is woven into a mesh with a specific shape, density and specification according to different requirements, so that good damping characteristics and certain rigidity are provided for the bearing. Wherein the thickness of the thick top layer foil 2 directly influences the bending resistance, and the thickened thick top layer foil can effectively solve the deformation under the action of the impact load.
Through wire mesh 3 as elastic support structure, improved the damping of bearing, receive the heavy load and the difficult plastic deformation that takes place of impact load, guarantee bearing capacity, shock resistance and reliability, can avoid redesign through the multilayer axial of adjustment wire mesh 3 and the damping of quick adjustment bearing of circumference distribution and then, and wire mesh 3 can directly use after tailorring, need not complicated processing, reduces the processing cost.
Specifically, the inner side and the outer side of the wire net 3 are both attached with the protective foil 4. The upper protective foil 4 and the bottom protective foil 4 separate the wire mesh 3 from the bearing sleeve 1 and the thick top foil 2, so that the surfaces of the bearing sleeve 1 and the thick top foil 2 are prevented from generating stripe-shaped marks due to the acting force of the wire mesh 1.
In order to facilitate the installation of the metal wire mesh 3, an axially extending installation groove 11 is arranged on the inner side of the bearing sleeve 1, the head end of the metal wire mesh 3 in the circumferential direction is turned outwards to form a radially extending flange 31, and the flange 31 is inserted into the installation groove 11, so that the head end of the metal wire mesh 3 is fixedly connected with the bearing sleeve 1.
Referring to fig. 5 and 6, fig. 5 is a schematic diagram illustrating a circumferential distribution of metal meshes in an embodiment of the radial foil air bearing according to the present invention; FIG. 6 is a schematic view of the axial distribution of the wire mesh in one embodiment of the radial foil air bearing provided by the present invention.
Also can arrange the concatenation in proper order along the axial with a plurality of wire mesh 3, divide into circular a plurality of with annular wire mesh promptly, cutting direction is along circumference. And axial and circumferential cutting can be simultaneously carried out, and finally a plurality of wire meshes 3 are spliced into a complete annular structure, and the size of the annular structure is matched with that of the annular gap.
Specifically, three mounting grooves 11 are uniformly distributed on the inner side of the bearing sleeve 1, four wire meshes 3 are arranged in parallel in the same mounting groove 11 along the axial direction, or the number and the mode of the division are adjusted according to the situation, the size of each wire mesh 3 is adjusted, and different damping is provided for the bearing.
Preferably, thick top layer foil 2 is the opening metal ring of 1mm to 4mm thickness, provides the flexible surface with the pivot contact, has good shock resistance, and thick top layer foil 2 provides certain pretightning force for wire mesh 3, prevents that the gas film pressure is little and causes contact inadequately between the wire mesh 3 when low-speed, and thick top layer foil 2 of thickening is difficult to warp when receiving impact load simultaneously. The protective foil 4 is a metal foil with a thickness of 0.05mm to 0.2mm, and prevents the wire mesh 3 from damaging the surface quality of the thick top foil 2 and the bearing sleeve 1.
In the radial foil air bearing provided by each of the above embodiments, the metal wire mesh 3 is a multi-layer mesh surface bonding structure, and a large coulomb friction force exists between the multi-layer metal wire mesh 3, so that the damping of the bearing is increased, and the reliability is improved. Preferably, the meshes of the wire net 3 are square holes, rhombic holes or hexagonal holes. The metal wire of the metal wire mesh 3 is a steel wire or a copper wire, the diameter of the metal wire is 0.03mm to 1mm, and the side length of the meshes of the metal wire mesh 3 is 0.03mm to 5 mm.
The radial foil air bearing provided by the present invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a radial foil air supporting bearing, includes bearing housing (1) and coaxial arrangement in inside thick top layer foil (2) of bearing housing (1), its characterized in that, bearing housing (1) with annular gap intussuseption between thick top layer foil (2) is filled with wire mesh (3), wire mesh (3) extend along the circumferencial direction, the head end fixed connection of wire mesh (3) circumferencial direction bearing housing (1), wire mesh (3) circumferencial direction's end is free state.
2. Radial foil air bearing according to claim 1, wherein a protective foil (4) is applied to both the inner and outer sides of the wire mesh (3).
3. The radial foil air bearing according to claim 2, wherein the bearing housing (1) is provided with an axially extending mounting groove (11) on the inner side, the circumferential head end of the wire mesh (3) is folded outwardly to form a radially extending flange (31), and the flange (31) is inserted into the mounting groove (11).
4. The radial foil air bearing according to claim 3, wherein a plurality of installation grooves (11) are sequentially arranged along a circumferential direction at the inner side of the bearing sleeve (1), a plurality of sections of the metal wire meshes (3) are sequentially installed in the installation grooves (11) along the circumferential direction, a plurality of curved sections of the metal wire meshes (3) are sequentially spliced end to form a complete circular ring structure, and the metal wire meshes (3) extend in the same direction.
5. Radial foil air bearing according to claim 4, wherein a plurality of said wire meshes (3) are axially arranged and spliced in succession.
6. The radial foil air bearing according to claim 5, wherein three mounting slots (11) are uniformly distributed on the inner side of the bearing housing (1), and four wire meshes (3) are axially arranged in parallel in the same mounting slot (11).
7. Radial foil airfoil bearing according to claim 2, wherein the thick top foil (2) has a thickness of 1mm to 4mm and the protective foil (4) has a thickness of 0.05mm to 0.2 mm.
8. Radial foil airfoil bearing according to any of claims 1 to 7, wherein the wire mesh (3) is of a multi-layer mesh-faced conformable structure.
9. Radial foil air bearing according to claim 8, wherein the meshes of the wire mesh (3) are square, diamond or hexagonal.
10. Radial foil air-bearing according to claim 9, characterized in that the wires of the wire mesh (3) are steel or copper wires, the diameter of the wires is 0.03mm to 1mm, and the mesh side length of the wire mesh (3) is 0.03mm to 5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111545415.3A CN114198390A (en) | 2021-12-16 | 2021-12-16 | Radial foil air bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111545415.3A CN114198390A (en) | 2021-12-16 | 2021-12-16 | Radial foil air bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114198390A true CN114198390A (en) | 2022-03-18 |
Family
ID=80654655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111545415.3A Pending CN114198390A (en) | 2021-12-16 | 2021-12-16 | Radial foil air bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114198390A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003262222A (en) * | 2002-03-08 | 2003-09-19 | Ntn Corp | Foil bearing |
| CN103438091A (en) * | 2013-08-02 | 2013-12-11 | 湖南大学 | Aero dynamic bearing with metal rubber and elastic chaff composite support structure |
| KR20170051721A (en) * | 2015-10-30 | 2017-05-12 | 한국기계연구원 | Gas foil bearing having metal mesh bump |
| CN108180223A (en) * | 2018-03-06 | 2018-06-19 | 石家庄金士顿轴承科技有限公司 | A kind of radial foil self-acting air bearing with thick top foil structure |
| CN110107590A (en) * | 2018-08-15 | 2019-08-09 | 稳力(广东)科技有限公司 | A kind of foil bearing for high speed rotor |
| CN111637149A (en) * | 2020-05-27 | 2020-09-08 | 西安交通大学 | Foil gas bearing with elastic damping structure |
| CN112196890A (en) * | 2020-10-29 | 2021-01-08 | 上海优社动力科技有限公司 | Radial gas foil bearing |
| CN113606246A (en) * | 2021-08-26 | 2021-11-05 | 珠海格力电器股份有限公司 | Radial gas foil bearing, air compressor, automobile and aircraft |
-
2021
- 2021-12-16 CN CN202111545415.3A patent/CN114198390A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003262222A (en) * | 2002-03-08 | 2003-09-19 | Ntn Corp | Foil bearing |
| CN103438091A (en) * | 2013-08-02 | 2013-12-11 | 湖南大学 | Aero dynamic bearing with metal rubber and elastic chaff composite support structure |
| KR20170051721A (en) * | 2015-10-30 | 2017-05-12 | 한국기계연구원 | Gas foil bearing having metal mesh bump |
| CN108180223A (en) * | 2018-03-06 | 2018-06-19 | 石家庄金士顿轴承科技有限公司 | A kind of radial foil self-acting air bearing with thick top foil structure |
| CN110107590A (en) * | 2018-08-15 | 2019-08-09 | 稳力(广东)科技有限公司 | A kind of foil bearing for high speed rotor |
| CN111637149A (en) * | 2020-05-27 | 2020-09-08 | 西安交通大学 | Foil gas bearing with elastic damping structure |
| CN112196890A (en) * | 2020-10-29 | 2021-01-08 | 上海优社动力科技有限公司 | Radial gas foil bearing |
| CN113606246A (en) * | 2021-08-26 | 2021-11-05 | 珠海格力电器股份有限公司 | Radial gas foil bearing, air compressor, automobile and aircraft |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4415280A (en) | Hydrodynamic fluid film bearing | |
| US4415281A (en) | Hydrodynamic fluid film bearing | |
| WO2006014659A1 (en) | Hydrodynamic journal foil bearing | |
| CN111795062B (en) | Radial foil dynamic pressure air bearing | |
| KR20150110808A (en) | Wind power plant gear mechanism | |
| CN103827524A (en) | Foil bearing | |
| CN110594290B (en) | Flat foil assembly, gas dynamic pressure bearing and high-speed motor | |
| CN111637149A (en) | Foil gas bearing with elastic damping structure | |
| CN210003665U (en) | multi-stage elastic support mechanism and dynamic pressure gas thrust bearing | |
| CN111637151A (en) | Thrust air foil bearing | |
| CN210623395U (en) | Foil air bearing | |
| CN111120503A (en) | Thrust dynamic pressure gas bearing with elastic supporting structure | |
| CN114198390A (en) | Radial foil air bearing | |
| CN111306184A (en) | Laminated thrust gas foil bearing | |
| CN209908992U (en) | Elastic supporting mechanism and dynamic pressure gas thrust bearing | |
| KR100528704B1 (en) | Gas Foil Journal Bearing | |
| CN108054852B (en) | Electric spindle | |
| CN213776068U (en) | Super-huge tapered roller turntable bearing with detachable small flange | |
| CN105673318A (en) | Novel wheel hub connection mechanism of wind driven generator | |
| CN213808475U (en) | Super-huge tapered roller bearing without expanding and contracting basket-shaped retainer | |
| CN213808512U (en) | High-precision low-friction super-huge type bearing solid retainer | |
| CN210003664U (en) | multistage elastic support assembly and dynamic pressure gas radial bearing | |
| CN211874935U (en) | Laminated thrust gas foil bearing | |
| CN216554937U (en) | Dynamic pressure gas radial bearing with multiple supporting arms | |
| CN217653079U (en) | Wall-broken convex foil dynamic pressure gas radial bearing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |