CN110242671A - A kind of cone foil dynamical pressure air bearing - Google Patents
A kind of cone foil dynamical pressure air bearing Download PDFInfo
- Publication number
- CN110242671A CN110242671A CN201910412731.XA CN201910412731A CN110242671A CN 110242671 A CN110242671 A CN 110242671A CN 201910412731 A CN201910412731 A CN 201910412731A CN 110242671 A CN110242671 A CN 110242671A
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- Prior art keywords
- support members
- paillon
- resilient support
- foil
- cone
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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
- F16C32/00—Bearings not otherwise provided for
- F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
- F16C32/0603—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion
- F16C32/0614—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion the gas being supplied under pressure, e.g. aerostatic bearings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Support Of The Bearing (AREA)
Abstract
The present invention provides a kind of conical foil dynamical pressure air bearing, belongs to hydrodynamic gas-lubricated bearing technical field.The bearing includes bearing block, resilient support members peace paillon, bearing block inner wall is in cone and offers card slot and threaded hole, corrugated foil can be used in elastic supporting element, bubbling type paillon and high desnity metal silk screen etc., it is all made of fan ring structure with flat paillon, and it is consistent with the developed surface structure size of bearing block inner wall circular cone, according to sequence from outside to inside in bearing block, successively installation resilient support members and flat paillon, resilient support members and flat paillon one end are fixed in card slot by screw overlapping, the other end is in free state, the cone angle for changing conical foil bearing can get different axial force and radial force ratio.The present invention can bear radial force and axial force simultaneously, have the characteristics that bearing capacity is high, it is strong to mitigate impact vibration ability, can be widely applied to field of bearings.
Description
Technical field
The present invention relates to hydrodynamic gas-lubricated bearing technical fields, particularly relate to a kind of conical foil dynamical pressure air bearing.
Background technique
Foil gas bearing is a kind of hydrodynamic gas-lubricated bearing with self-applying flexible surface, and flexible surface generally uses
Metal foil is made.Foil gas bearing has certain rigidity and damping because of its flexible surface, can be according to load condition certainly
Adaptively change the air-film thickness in bearing, so that bearing be allow to adapt to the angular deviation of axis in a certain range, improves axis
The ability of the bearing capacity and mitigation impact vibration held.Have a structure which that simple, revolving speed is high, friction power loss is low, stability is good
The advantages that, in aerospaces such as following high-speed rotating machines such as turbocharger, aircraft gas turbine, space turbo-expander
Field and fuel cell are had broad application prospects with air compressor field.
But in practical applications, the radial dynamic pressure gas bearing of carrying generally cooperates thrust foil bearing to use, and works as fortune
The angular deviation that will appear axis when row causes its bearing capacity to reduce, wears and generate heat seriously, and the service life substantially reduces.Traditional foil
Piece bearing combining form also result in shafting complexity, cannot well by foil deformation cope with operation process in shock loading with
Whirling motion easily causes the friction damage between axis and paillon.
It can be seen that in the prior art, traditional paillon transverse bearing and foil thrust bearing all presence have a single function,
Be used in conjunction with each other ineffective of the two and complete machine structure, cost and service life is caused not to reach requirement.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of conical foil dynamical pressure air bearing, have mixing paillon diameter
To with thrust bearing function, radial force and axial force can be born simultaneously, loading force is higher, and the ability for mitigating impact vibration is stronger.
The bearing includes bearing block, resilient support members peace paillon, and bearing block inner wall is axially arranged with card in cone, edge
Slot and threaded hole successively install resilient support members and flat paillon, resilient support according to sequence from outside to inside in bearing block
Element and the expansion of flat paillon are fan annular, and dimensional parameters are consistent with the expansion of bearing block circular conical surface of inner wall, resilient support member
One end is fixed in bearing block card slot as fixing end by fixing screws overlapping after part peace paillon is rolled, other end conduct
Free end can circumferentially extend in free state, and the circumferential lengths of flat paillon are slightly larger than resilient support members, resilient support member
Part side is bonded with bearing block inner wall, and the other side is contacted with flat paillon.
The fixing means of bearing block inner wall and resilient support members peace paillon, can be that screw is fixed, skewed slot is fixed, hole
Pin such as is fixedly clamped at the modes.
The type of resilient support members can be corrugated foil, bubbling type paillon, high desnity metal silk screen, high-damping viscoelastic
Property material etc., different-thickness, density etc. can be chosen and tie special structural parameters to obtain different support stiffness.
From the fixing end of resilient support members to free end, the height of resilient support members is equal or different, to obtain edge
Axial identical or gradual change cone angle；When resilient support members are corrugated foil, foil encircles direction along conical surface bearing generatrix direction, and its
Width is along generatrix direction gradual change or constant.
The material of flat paillon and resilient support members (only limiting resilient support members is paillon) be beryllium-bronze, nickel-base alloy or
Stainless steel etc..
The side that flat paillon is contacted with cone axis is provided with wear-resistant coating, the material of wear-resistant coating be layer of molybdenum-disulfide or
Polytetrafluorethylecoatings coatings, coating layer thickness 0.002mm-0.2mm.
Flat paillon can open helicla flute, chevron-notch etc. to increase bearing capacity.
The advantageous effects of the above technical solutions of the present invention are as follows:
In above scheme, when conical foil bearing bears load, radial compression deformation, bullet occur for resilient support members
Property support component peace paillon plays a supportive role jointly, while resilient support members and circular cone paillon extend.In air film pressure
Friction common offer is provided between the structural damping of support component, resilient support members and bearing block, flat paillon under the action of power
Damping.With the increase of load, the rigidity of circular cone foil bearing and structural damping, resilient support members bring frictional damping
It is gradually increased.The bearing can bear radial force and axial force simultaneously, have the spies such as bearing capacity is high, mitigation impact vibration ability is strong
Point, can be widely applied to field of bearings.
Detailed description of the invention
Fig. 1 is the main assembly structural schematic diagram of conical foil dynamical pressure air bearing of the invention；
Fig. 2 is the bearing block schematic diagram of conical foil dynamical pressure air bearing of the invention；
Fig. 3 is the resilient support members structural schematic diagram of conical foil dynamical pressure air bearing of the invention, wherein (a)
(b) it is separate type corrugated foil structure for monoblock type corrugated foil structure, (c) is bubbling type foil configuration；
Fig. 4 is the structural schematic diagram of the conical flat paillon of foil dynamical pressure air bearing of the invention；
Fig. 5 is the resilient support members peace paillon fixed form structure of conical foil dynamical pressure air bearing of the invention
Schematic diagram；
Fig. 6 be conical foil dynamical pressure air bearing of the invention in the case where axial displacement resilient support members from solid
Play the process schematic that sliding deformation gradually occurs in fixed end.
Wherein: 1- bearing block；2- resilient support members；The flat paillon of 3-；4- fixing screws；11- bearing block ontology；12- spiral shell
Pit；13- card slot.
Specific embodiment
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
The present invention has a single function for existing traditional paillon transverse bearing and foil thrust bearing, the two mutual cooperation makes
The problem of causing complete machine structure, cost and service life not to reach requirement with ineffective, it is empty to provide a kind of conical foil dynamical pressure
Gas bearing.
As shown in Figure 1, the cone radial foil bearing include: bearing block 1, resilient support members 2, flat paillon 3 and
Fixing screws 4；Its bottom bracket 1 includes bearing block ontology 11, threaded hole 12 and card slot 13, and 1 inner wall of bearing block offers one
Axial card slot 13；According to sequence from outside to inside in bearing block 1, corresponding resilient support members 2 and flat foil are successively installed
Piece 3,2 one end of resilient support members and flat 3 one end of paillon are used as fixing end, folded by the fixing screws 4 for being inserted into threaded hole 12
Conjunction is fixed in corresponding card slot 13, and the other end of resilient support members 2 and flat paillon 3 is as free end in free state；
2 circumferential lengths of resilient support members are slightly less than the length of flat paillon 3, resilient support members 2 and 1 inner wall of bearing block and flat paillon 3
Fitting generates contact friction.
In practical application, the specific material of resilient support members 2, type can be determined specifically according to actual needs, commonly
There are corrugated foil, bubbling type paillon, high desnity metal silk screen and other viscoelastic materials.When using paillon, material can be beryllium
Bronze, stainless steel, nickel-base alloy etc..
As shown in Fig. 2, taper is adjustable to obtain different bearings axially and radially bearing capacity.
As shown in Fig. 3 (a), (b), along conical bearing generatrix direction gradual change, the foil of separate type encircles the foil arch span degree of monoblock type
Width is consistent along generatrix direction；When the parameter configuration that the conical radial foil bearing carries are as follows: elastic supporting element 2 uses
Bubbling type paillon (such as Fig. 3 (c)), bubbling can have the arrangements such as circumferential insert row, axial in-line arrangement.
As shown in figure 4, the side contacted on flat paillon with axis is provided with wear-resistant coating, the material of the wear-resistant coating is
Layer of molybdenum-disulfide or polytetrafluorethylecoatings coatings, coating layer thickness 0.002mm-0.2mm.
In practical application, the fixed form of resilient support members 2 is not limited to screw in compression fixation side exemplified by Fig. 5
Formula, the modes such as common also straight pin fastens, circular trough is fixed.
Fig. 6 in the conical load bearing situation of foil bearing of the present invention resilient support members 2 (with corrugated foil
For) process schematic of deformation is gradually in contact from fixing end with flat paillon 3, specifically:
The cone radial foil bearing, according to sequence from outside to inside, successively installs corresponding elasticity in bearing block
Support component 2 and flat paillon 3, compressed resilient support members 2 when loaded, with corresponding flat paillon 3 at fixing end
Line circumferentially slides to free end.Cone foil bearing rigidity of structure size of the present invention only by resilient support members 2 and
Flat 3 design parameter of paillon determines.
When the conical foil bearing bears load, between bearing block 1 and resilient support members 2, member is flexibly supported
There are frictional dampings when the peaceful paillon 3 of part 2 extends, so that cone foil bearing bearing capacity of the present invention and operation are steady
It is qualitative to be greatly improved.
In the present invention, the axis of the extension direction of circular cone paillon and resilient support members and the conical foil bearing rotates
It is contrary.
In practical application, heretofore described cone foil bearing can also pass through the structure of change resilient support members 2
Characteristic is bubbled paillon for example, by using multilayer corrugated paillon or multilayer, by multilayer foil encircle or be bubbled between height official post bearing
The different rigidities of structure is obtained, under different loads to improve the bearing capacity of bearing, guarantee that bearing has under heavy shock loads
Better stability and impact resistance.
In practical application, also circumferentially settable multiple card slots install the peaceful paillon of sequentially connected elastic supporting element 2
3, circumferential multiple wedge shapes are obtained, wedge gap in bearing is advanced optimized and increases bearing area, further increase bearing
Bearing capacity.
In practical application, helicla flute and chevron-notch also are opened on flat paillon 3, to obtain the excellent load-carrying properties of spiral grooved bearing
With the elastic damping overall merit of foil bearing.
In the application, when changing bearing block taper and flat paillon corresponding angle, different loading ability of bearing can be obtained
Can, increase cone angle, the maximum axial force that pyramid type foil bearing is born increases and radial force reduces；Reduce cone angle, pyramid type
The limit radial force that bump foil bearing can bear increases, and axial limit bearing capacity reduces.Change circular cone paillon of the present invention
The cone angle of bearing can obtain different axial force and radial force ratio.
When by axial load axial displacement is occurred for shafting, between the circular conical surface and pyramid type foil bearing of shaft part
Gap reduces, and also corresponds to the nominal clearance for reducing bearing, and the axially and radially bearing capacity that will lead to bearing increases, and is conducive to
It improves load-carrying properties and prevents axle-system axial play.Pyramid type foil bearing i.e. of the present invention is a kind of with function of self-tightening
Bearing.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, several improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of cone foil dynamical pressure air bearing, it is characterised in that: including bearing block (1), resilient support members (2) peace
Paillon (3), bearing block (1) inner wall are pressed in bearing block (1) in cone along card slot (13) and threaded hole (12) is axially arranged with
According to sequence from outside to inside, resilient support members (2) and flat paillon (3), resilient support members (2) and flat paillon are successively installed
(3) expansion be fan annular, dimensional parameters are consistent with the expansion of bearing block (1) circular conical surface of inner wall, resilient support members (2) and
One end is fixed on the card slot (13) of bearing block (1) as fixing end by fixing screws (4) overlapping after flat paillon (3) is rolled
Interior, the other end is as free end in free state, and the circumferential lengths of flat paillon (3) are greater than resilient support members (2), elasticity branch
Support element (2) side is bonded with bearing block (1) inner wall, and resilient support members (2) other side is contacted with flat paillon (3).
2. cone foil dynamical pressure air bearing according to claim 1, it is characterised in that: bearing block (1) inner wall
Fixing means with the peaceful paillon (3) of resilient support members (2) is one during screw is fixed, skewed slot is fixed, hole pin is fixedly clamped
Kind.
3. cone foil dynamical pressure air bearing according to claim 1, it is characterised in that: the resilient support members
It (2) is one of corrugated foil, bubbling type paillon, high desnity metal silk screen, high damping visco-elastic material.
4. cone foil dynamical pressure air bearing according to claim 3, it is characterised in that: the resilient support members
(2) when being corrugated foil, foil encircles direction along conical surface bearing generatrix direction, and width is along generatrix direction gradual change or constant.
5. cone foil dynamical pressure air bearing according to claim 1, it is characterised in that: flat paillon (3) material
For one of beryllium-bronze, nickel-base alloy or stainless steel.
6. cone foil dynamical pressure air bearing according to claim 1, it is characterised in that: the flat paillon (3) and circle
The side of axis of cone contact is provided with wear-resistant coating, and wear-resistant coating is layer of molybdenum-disulfide or polytetrafluorethylecoatings coatings, and coating layer thickness is
0.002mm-0.2mm。
7. cone foil dynamical pressure air bearing according to claim 1, it is characterised in that: opened on the flat paillon (3)
Helicla flute or chevron-notch.
8. cone foil dynamical pressure air bearing according to claim 3, it is characterised in that: the resilient support members
(2) be corrugated foil or bubbling type paillon when, resilient support members (2) material be beryllium-bronze, nickel-base alloy or stainless steel in
It is a kind of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910412731.XA CN110242671A (en) | 2019-05-17 | 2019-05-17 | A kind of cone foil dynamical pressure air bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910412731.XA CN110242671A (en) | 2019-05-17 | 2019-05-17 | A kind of cone foil dynamical pressure air bearing |
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| Publication Number | Publication Date |
|---|---|
| CN110242671A true CN110242671A (en) | 2019-09-17 |
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ID=67884063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910412731.XA Pending CN110242671A (en) | 2019-05-17 | 2019-05-17 | A kind of cone foil dynamical pressure air bearing |
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| Country | Link |
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| CN (1) | CN110242671A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111457010A (en) * | 2020-03-24 | 2020-07-28 | 北京科技大学 | Magnetic-gas hybrid bearing |
| CN112648291A (en) * | 2020-12-29 | 2021-04-13 | 上海嵘熵动力科技有限公司 | Dynamic pressure air suspension bearing with good stability |
| CN113857785A (en) * | 2021-09-30 | 2021-12-31 | 西安交通大学 | Manufacturing method of patch type radial dynamic pressure gas bearing |
| CN115076223A (en) * | 2022-06-13 | 2022-09-20 | 西安交通大学 | High-speed dynamic pressure gas bearing and high-speed dynamic pressure gas bearing pair |
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| US4223958A (en) * | 1978-12-29 | 1980-09-23 | Mechanical Technology Incorporated | Modular compliant hydrodynamic bearing with overlapping bearing sheet |
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| US20050163407A1 (en) * | 2004-01-22 | 2005-07-28 | Honeywell International Inc. | Hydrodynamic journal foil bearing system |
| CN101709747A (en) * | 2009-11-17 | 2010-05-19 | 西安交通大学 | Foil dynamical pressure radial air journal bearing with backward wave foil support |
| CN202946545U (en) * | 2011-12-13 | 2013-05-22 | 哈尔滨东安发动机（集团）有限公司 | Aerodynamic bearing |
| CN107725593A (en) * | 2017-11-09 | 2018-02-23 | 西安交通大学 | Elastic bearing Foil gas bearing with the pre- wedge shape space of inherent structure |
| CN207261472U (en) * | 2017-07-27 | 2018-04-20 | 天津大学 | A kind of gas bearing |
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2019
- 2019-05-17 CN CN201910412731.XA patent/CN110242671A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4223958A (en) * | 1978-12-29 | 1980-09-23 | Mechanical Technology Incorporated | Modular compliant hydrodynamic bearing with overlapping bearing sheet |
| JPS59197614A (en) * | 1983-04-23 | 1984-11-09 | Ishikawajima Harima Heavy Ind Co Ltd | Bearing construction |
| US20050163407A1 (en) * | 2004-01-22 | 2005-07-28 | Honeywell International Inc. | Hydrodynamic journal foil bearing system |
| CN101709747A (en) * | 2009-11-17 | 2010-05-19 | 西安交通大学 | Foil dynamical pressure radial air journal bearing with backward wave foil support |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111457010A (en) * | 2020-03-24 | 2020-07-28 | 北京科技大学 | Magnetic-gas hybrid bearing |
| CN112648291A (en) * | 2020-12-29 | 2021-04-13 | 上海嵘熵动力科技有限公司 | Dynamic pressure air suspension bearing with good stability |
| CN112648291B (en) * | 2020-12-29 | 2022-04-29 | 上海嵘熵动力科技有限公司 | Dynamic pressure air suspension bearing with good stability |
| CN113857785A (en) * | 2021-09-30 | 2021-12-31 | 西安交通大学 | Manufacturing method of patch type radial dynamic pressure gas bearing |
| CN113857785B (en) * | 2021-09-30 | 2023-08-15 | 西安交通大学 | Method for manufacturing patch type radial dynamic pressure gas bearing |
| CN115076223A (en) * | 2022-06-13 | 2022-09-20 | 西安交通大学 | High-speed dynamic pressure gas bearing and high-speed dynamic pressure gas bearing pair |
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Application publication date: 20190917 |