CN104454992B - Elastic radial air bearing - Google Patents
Elastic radial air bearing Download PDFInfo
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- CN104454992B CN104454992B CN201410515830.8A CN201410515830A CN104454992B CN 104454992 B CN104454992 B CN 104454992B CN 201410515830 A CN201410515830 A CN 201410515830A CN 104454992 B CN104454992 B CN 104454992B
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- bearing
- radial elastic
- wire loop
- elastic air
- bearing shell
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Abstract
The invention discloses an elastic radial air bearing, which comprises a bearing body, metal wire mesh rings and a flexible tilting bush structure, wherein the bearing body and the metal wire mesh rings are coaxially arranged, the two metal wire mesh rings with the same specification are symmetrically arranged in circular grooves in two ends of the bearing body, the flexible tilting bush structure mainly comprises a bearing bush and a flexible supporting structure, the bearing bush is arranged on the inner side of the bearing body and is connected with the bearing body through the flexible supporting structure, and a mating surface of the bearing and a rotating shaft is formed in the inner surface of the bearing bush. By adopting the parallel distribution of the flexible tilting bush structure and the metal wire mesh rings, the bearing has the characteristics of high rigidity and high damping, the bearing capability of the bearing is enhanced, the vibration impact of the bearing is reduced, and the reliability and running stability of the bearing can be improved.
Description
Technical field
The present invention relates to air bearing technology field is and in particular to a kind of radial elastic air bearing.
Background technology
Air bearing is a kind of self-applying elastic bearing air bearing using the air in surrounding environment as lubricant.Empty
Gas bearing pass through form a layer of air film between power transmission shaft and bearing so that the frictional force between power transmission shaft and bearing significantly
Reduce.Compared with common rotor bearing, it has, and rotating speed is high, and precision is good, and reliability is high, oil-free lubrication, and frictional dissipation is little, can be
The series of advantages such as work under hot environment.
In air bearing field, elastic support structure plays supporting and the effect of vibration damping, employs tool resilient supporting knot
Structure, can set up the work gas intermembrane space of different-thickness at any time according to difference loaded.In air bearing, elastic bearing
Structure should have good rigidity and damping simultaneously, and the gentle syzygies of the good bearing capacity of the corresponding acquisition of the bearing making is hit and shaken
Dynamic ability.The elastic support structure of excellent performance can suppress the vibration of rotor well using its damping characteristic, greatly increases
The reliability of bearing and operation stability.
Through the development of decades, it carries air bearing and damping capacity has been greatly improved, but new sky
Gas bearing has simply made simple change to ripple paillon foil parameter on the basis of forefathers, fails to do in terms of bearing arrangement essential
Improvement, and the damping characteristic of bearing needs to be improved further.Therefore how to improve the performance of elastic support structure to improve sky
The performance of gas bearing becomes a highly important problem.
Content of the invention
It is an object of the invention to overcoming above-mentioned the deficiencies in the prior art, and provide a kind of bullet by improving air bearing
Property supporting structure, improve the damping of supporting structure and rigidity, reduce the impact that vibration causes, improve the entire load-carrying capacity of bearing
Radial elastic air bearing with operation stability.
In order to achieve the above object, the present invention employs the following technical solutions：A kind of radial elastic air bearing, including：Axle
Hold body, wire loop and flexible tilting bush structure, described bearing body and wire loop are using being coaxially disposed, identical by two
The wire loop of specification is symmetrically mounted in the annular groove at bearing body two ends, and described flexibility tilting bush structure is mainly by bearing shell
With flexible supporting structure composition, described bearing shell is arranged inside bearing body, and described bearing shell passes through flexible supporting structure and bearing body
It is connected, described inner surface of bearing bush forms the mating surface of bearing and rotating shaft.
Further, described flexibility tilting bush structure and bearing body adopt monolithic construction.
Further, described bearing shell is uniformly distributed in a circumferential direction, and described bearing shell is provided with plating with the surface of shaft contacts
Layer.
Further, described bearing shell can carry out low-angle rotation.
Further, described wire loop is first reticulated by the metal wire knitted of definite quality, then adopts cold punching technology
Make the ring-type suiting the requirements.
Further, described wire loop is set to hollow cylinder structure.
Further, it is provided with air supply channel and throttle orifice in described flexible supporting structure, described bearing shell is provided with air cavity.
Further, described air cavity is dissymmetrical structure.
The technical solution adopted in the present invention has the advantages that：
The present invention, in the form of flexible tilting bush structure and wire loop are arranged in parallel, makes bearing have Gao Gang simultaneously
Degree and the characteristic of high-damping, the vibratory impulse reducing bearing, improve bearing can simultaneously for the bearing capacity that improve bearing
By property.During bearing normal work, wedge shape air film can be formed in the mating surface of each bearing shell and axle, substantially increase the operation of bearing
Stability.Meanwhile, the bearing shell on bearing body can rotate in the presence of gas film pressure and move radially, flexible tilting bush knot
Structure can be deformed, and now bearing shell can oppress wire loop makes it be deformed, thus common provide elastic bearing for bearing.
Flexible tilting bush structure has a characteristic that rigidity is big, damping is little, and wire loop has damping is big, rigidity is little attribute,
Under the collective effect of flexible tilting bush structure and wire loop, both stiffness characteristics and damping characteristic are overlapped mutually, air
Bearing just has the characteristic of high rigidity and high-damping simultaneously.
Compared with existing air bearing, elastic composite supporting structure proposed by the present invention improves bearing damp and rigidity
Characteristic, significantly improves the bearing capacity of bearing and the ability relaxing impact shock, also improves gas bearing to a certain extent
The problem of poor reliability.
Brief description
Fig. 1 is the overall structure diagram of radial elastic air bearing of the present invention；
A kind of structural representation of bearing body for providing in first embodiment of the invention for the Fig. 2；
Fig. 3 is a kind of bearing body partial structural diagram providing in first embodiment of the invention；
Fig. 4 is the structural representation of the wire loop of radial elastic air bearing of the present invention；
The structural representation of another kind of bearing body for providing in second embodiment of the invention for the Fig. 5；
The partial structural diagram of another kind of bearing body for providing in second embodiment of the invention for the Fig. 6；
Fig. 7 is matched with wire loop schematic diagram for bearing body of the present invention；
In figure：1. wire loop, 2. bearing body, 3. bearing shell, 4. flexible supporting structure, 5. air supply channel, 6. throttle orifice,
7. air cavity.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention is described in further detail.However it will be appreciated that
It is that following specific embodiments are only the preferred technical solution of the present invention, and should not be construed limitation of the present invention.
Embodiment one
As shown in figure 1, a kind of radial elastic air bearing, including：Bearing body 2, wire loop 1 and flexible tilting bush knot
Structure, described bearing body 2 and wire loop 1, using being coaxially disposed, are symmetrically mounted on by the wire loop 1 of two same sizes
In the annular groove at bearing body 2 two ends, described flexibility tilting bush structure is mainly made up of bearing shell 3 and flexible supporting structure 4, described
Bearing shell 3 is arranged inside bearing body 2, and described bearing shell 3 is connected with bearing body 2 by flexible supporting structure 4, when bearing shell 3 is subject to
During radial load, bearing shell 3 meeting presses flexible supporting structure 4, so that bearing shell 3 moves radially, described bearing shell 3 inner surface forms bearing
Mating surface with rotating shaft.In the inside of bearing, elastic support structure is collectively constituted by flexible tilting bush structure and wire loop.
As shown in Fig. 2 described bearing body 2 is the agent structure of bearing, play the effect of installation, protection and supporting, described axle
Holding body 2 two ends has an annular groove, and the inner surface of described bearing body 2 is machined with n bearing shell 3, the surface of described bearing shell 3 be bearing with
The mating surface of rotating shaft, preferably carries out coating process.The partial schematic diagram for bearing body 2 shown in Fig. 3, described bearing shell 3 can root
Carry out Small-angle Rotation according to the rotation of bearing and come adjustment position and angle, improve the operation stability of bearing.Described bearing body 2
On n bearing shell be uniformly distributed in a circumferential direction, the central angle corresponding to the adjacent bearing bush center of each two be θ, then θ=
360 °/n, flexible supporting structure 4 is β with the RADIAL corresponding to bearing shell 3 junction and the angle corresponding to horizontal direction, this angle
Degree can change according to the difference of bearing shell stressing conditions, due to the mal-distribution of wedge shape gas film pressure on described bearing shell 3, should
The center of bearing shell is often deviateed in junction, and flexible tilting bush structure and bearing body 2 employ overall construction design, so
The structure that not only simplify air bearing also avoid the impact accumulating to bearing of rigging error, after improve bearing machining
Precision.Flexible supporting structure 4 also reduces the requirement to machining accuracy, eliminates traditional tilting-pad bearing intermediate bushing 3 and bearing
The problem of abrasion occurs during connecting portion rotation, and avoids traditional tilting-pad bearing leading to bearing shell 3 because of axle thermal expansion and turning
Abrasion between axle, improves antiwhip and reliability.
Wire loop 1, is first to be reticulated the metal wire knitted preparing by quality with certain method as shown in Figure 4,
Then make the ring-type suiting the requirements with cold punching technology, by changing material, relative density, wall thickness and the axle of woven wire 1
Its rigidity and damping characteristic can be changed to parameters such as length, wire loop 1 is arranged on the groove of bearing body 2, by two
Wire loop 1 is symmetrically embedded in the two ends of bearing body 2.
During bearing working, the composite support structure of flexible tilting bush structure and wire loop 1 composition, jointly carry for bearing
For elastic bearing, bearing shell 3 can rotate in the presence of gas film pressure and move radially, and thus change bearing shell 3 and axle
Between gap, be conducive to the formation of wedge shape air film.Bearing shell 3 on bearing body 2 rotates in the presence of gas film pressure
While with moving radially, bearing shell also can oppress wire loop makes it be deformed simultaneously, jointly provides elasticity for bearing
Hold.Flexible tilting bush structure has a characteristic that rigidity is big, damping is little, and wire loop 1 has damping is big, rigidity is little genus
Property, under the collective effect of flexible tilting bush structure and wire loop 1, both stiffness characteristics and damping characteristic are mutually folded
Plus, air bearing just has the characteristic of high rigidity and high-damping simultaneously.Simultaneously can also be by changing the axial direction of wire loop 1
In length and flexible tilting bush structure, the length of flexible supporting structure 4, obtains the similar sky with different damping and stiffness characteristics
Gas bearing.
Embodiment two
Fig. 5 show the structural representation of another kind of bearing body provide in second embodiment of the invention.
The operation principle of the present embodiment middle (center) bearing is substantially identical with embodiment one, and difference is that the present embodiment is gas
Hybrid bearing.Aero dynamic bearing in embodiment one, in startup and docking process, can not form foot because speed is low
Enough separate the air film of two friction surfaces, abrasion easily occurs.Gas hybrid bearing is used, not only in embodiment two
Avoid aero dynamic bearing and abrasion occurs in startup and docking process, and there is under any rotating speed high rotation essence
Degree and high bearing capacity.
Fig. 6 show the partial sectional view of gas dynamic and hydrostatic bearing middle (center) bearing body, is with embodiment one difference, this
It is provided with air supply channel 5 and throttle orifice 6 in flexible supporting structure in embodiment, bearing shell 3 is provided with air cavity 7, described air cavity 7
Using dissymmetrical structure, this structure is conducive to the deflection of bearing shell 3, thus being more readily formed wedge shape air film, is conducive to changing simultaneously
The distribution of pressure on kind bearing shell 3.During bearing working, hydrostatic bearing provides gas pressure to form pressure air film by outside pump, with
Bear load.Ensure that bearing does not have directly contact in startup and shutdown phase friction pair two surface yet by such, it is to avoid occur
Abrasion.
Described bearing body structure, while retaining air bearing high-damping and high rigidity characteristic, solves bearing low in axle
Speed occurs the problem of abrasion when rotating, extend the working life of bearing, simultaneously because the pressure ratio on surface of friction pair is relatively
Uniformly, improve the reliability and stability of bearing.
To sum up, the present invention adopts wire loop structure structure to provide damping for bearing, and wire loop 1 is retaining metal spy
Property while be provided with certain elasticity and damping characteristic, employ simultaneously flexible tilting bush structure for bearing provide rigidity.This
Invention is passed through to improve the elastic support structure of air bearing, using rigidity and the resistance of flexible tilting bush structure and wire loop 1
The Overlay of Buddhist nun come to improve air bearing bearing capacity and relax impact shock ability so that air bearing has well
Rigidity and damping, improve bearing capacity and the operation stability of bearing.
Except example set forth above, bearing body and wire loop can have different installations and fixing means, bearing
The concrete shape parameter of the flexible tilting bush structure on body and wire loop can be designed according to different situations, on bearing body
The number of bearing shell and distribution situation design also dependent on different situations.Example provided above is only the preferred embodiment of the present invention, greatly
All simple equivalence changes made according to the claims in the present invention and invention book content and modification, all should belong to patent of the present invention and cover
Scope.
Claims (9)
1. a kind of radial elastic air bearing, including：Bearing body (2), wire loop (1) and flexible tilting bush structure, described
Bearing body (2) and wire loop (1) are using being coaxially disposed the wire loop (1) it is characterised in that by two same sizes
It is symmetrically mounted in the annular groove at bearing body (2) two ends, described flexibility tilting bush structure is mainly by bearing shell (3) and sinking support
Structure (4) forms, and described bearing shell (3) is arranged inside bearing body (2), and described bearing shell (3) passes through flexible supporting structure (4) and axle
Hold body (2) to be connected, described bearing shell (3) inner surface forms the mating surface of bearing and rotating shaft.
2. radial elastic air bearing according to claim 1 is it is characterised in that described flexibility tilting bush structure and bearing
Body (2) adopts monolithic construction.
3. radial elastic air bearing according to claim 1 is it is characterised in that described bearing shell (3) and shaft contacts table
Face is provided with coating.
4. the radial elastic air bearing according to claim 1 or 3 is it is characterised in that described bearing shell (3) is in circumferencial direction
On be uniformly distributed.
5. radial elastic air bearing according to claim 1 is it is characterised in that described bearing shell (3) can carry out low-angle
Rotation.
6. radial elastic air bearing according to claim 1 is it is characterised in that described wire loop (1) is by metal
Silk braiding reticulates, then is made using cold punching technology.
7. radial elastic air bearing according to claim 1 is it is characterised in that described wire loop (1) is set to
Hollow cylinder structure.
8. radial elastic air bearing according to claim 1 is it is characterised in that set in described flexible supporting structure (4)
It is equipped with air supply channel (5) and throttle orifice (6), described bearing shell (3) is provided with air cavity (7).
9. radial elastic air bearing according to claim 8 it is characterised in that described air cavity (7) be set to asymmetric
Structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410515830.8A CN104454992B (en) | 2014-09-30 | 2014-09-30 | Elastic radial air bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410515830.8A CN104454992B (en) | 2014-09-30 | 2014-09-30 | Elastic radial air bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104454992A CN104454992A (en) | 2015-03-25 |
| CN104454992B true CN104454992B (en) | 2017-02-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410515830.8A Active CN104454992B (en) | 2014-09-30 | 2014-09-30 | Elastic radial air bearing |
Country Status (1)
| Country | Link |
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| CN (1) | CN104454992B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106286595A (en) * | 2015-05-26 | 2017-01-04 | 大银微系统股份有限公司 | Air bearing improvement structure |
| WO2018022015A1 (en) * | 2016-07-26 | 2018-02-01 | Florida Turbine Technologies, Inc. | Turbocharger with oil-free hydrostatic bearing |
| US10385915B2 (en) * | 2016-08-16 | 2019-08-20 | Hamilton Sundstrand Corporation | High load capacity hybrid foil bearing |
| CN106678233A (en) * | 2016-12-05 | 2017-05-17 | 湖南大学 | Novel active absorber based on PZT (piezoelectric ceramic) |
| CN108397885B (en) * | 2017-07-18 | 2023-07-18 | 奥克斯空调股份有限公司 | Damping shaft, air outlet structure and air conditioner |
| CN108180224B (en) * | 2017-12-21 | 2019-07-19 | 南京航空航天大学 | Resilient bearing based on double retainers |
| CN109163016B (en) * | 2018-08-02 | 2020-09-15 | 广东威灵电机制造有限公司 | Tilting-pad oil-retaining bearing and motor |
| CN111637149A (en) * | 2020-05-27 | 2020-09-08 | 西安交通大学 | Foil gas bearing with elastic damping structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438091A (en) * | 2013-08-02 | 2013-12-11 | 湖南大学 | Aero dynamic bearing with metal rubber and elastic chaff composite support structure |
| CN103671544A (en) * | 2013-12-19 | 2014-03-26 | 湖南大学 | Radial elastic air bearing |
| CN103671545A (en) * | 2013-12-19 | 2014-03-26 | 湖南大学 | Radial elastic air bearing |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6848828B2 (en) * | 2002-03-08 | 2005-02-01 | Ntn Corporation | Foil bearing and spindle device using the same |
| JP4961485B2 (en) * | 2010-03-30 | 2012-06-27 | 本田技研工業株式会社 | Dynamic pressure type foil type gas bearing |
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2014
- 2014-09-30 CN CN201410515830.8A patent/CN104454992B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438091A (en) * | 2013-08-02 | 2013-12-11 | 湖南大学 | Aero dynamic bearing with metal rubber and elastic chaff composite support structure |
| CN103671544A (en) * | 2013-12-19 | 2014-03-26 | 湖南大学 | Radial elastic air bearing |
| CN103671545A (en) * | 2013-12-19 | 2014-03-26 | 湖南大学 | Radial elastic air bearing |
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| Publication number | Publication date |
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| CN104454992A (en) | 2015-03-25 |
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