CN104454992A - Elastic radial air bearing - Google Patents
Elastic radial air bearing Download PDFInfo
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- CN104454992A CN104454992A CN201410515830.8A CN201410515830A CN104454992A CN 104454992 A CN104454992 A CN 104454992A CN 201410515830 A CN201410515830 A CN 201410515830A CN 104454992 A CN104454992 A CN 104454992A
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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, be specifically related to a kind of radial elastic pneumatic bearing.
Background technique
Pneumatic bearing is a kind of self-applying yielding support pneumatic bearing using the air in surrounding environment as oiling agent.Pneumatic bearing, by forming one deck air film between transmission shaft and bearing, makes the frictional force between transmission shaft and bearing greatly reduce.Compared with common rotor bearing, it is high that it has rotating speed, and precision is good, and reliability is high, oil-free lubrication, and frictional loss is little, and the series of advantages such as can work in high temperature environments.
At air bearing field, elastic support structure plays supporting and vibration damping, have employed and has flexible supporting structure, can set up the work gas intermembrane space of different-thickness according to the difference of suffered load at any time.In pneumatic bearing, elastic support structure should have good rigidity and damping simultaneously, and the bearing made obtains good bearing capacity accordingly and eases up and close the ability of impact shock.The elastic support structure of excellent performance can utilize its damping characteristic well to suppress the vibration of rotor, greatly increases reliability and the operation stability of bearing.
Pneumatic bearing is through the development of decades, its carrying and damping capacity are greatly improved, but new pneumatic bearing has just made simple change to ripple paillon foil parameter on the basis of forefathers, and fail to do from bearing structure aspect the improvement of internal, and the damping characteristic of bearing needs to be improved further.Therefore the performance how improving elastic support structure becomes a very important problem with the performance improving pneumatic bearing.
Summary of the invention
The object of the invention is to overcome above-mentioned the deficiencies in the prior art, and a kind of elastic support structure by improving pneumatic bearing is provided, improve damping and the rigidity of supporting structure, reduce to vibrate the impact caused, improve the entire load-carrying capacity of bearing and the radial elastic pneumatic bearing of operation stability.
In order to achieve the above object, the present invention is by the following technical solutions: a kind of radial elastic pneumatic bearing, comprise: bearing support, wire loop and flexible tilting bush structure, described bearing support and wire loop adopt coaxial setting, be arranged in the annular groove at bearing support two ends by the wire loop symmetry of two same sizes, described flexible tilting bush structure is primarily of bearing shell and flexible supporting structure composition, described bearing shell is arranged at inside bearing support, described bearing shell is connected with bearing support by flexible supporting structure, described inner surface of bearing bush forms the fitting surface of bearing and rotating shaft.
Further, described flexible tilting bush structure and bearing support adopt monolithic construction.
Further, described bearing shell is uniformly distributed in a circumferential direction, and the surface of described bearing shell and shaft contacts is provided with coating.
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 the ring-type adopting cold punching technology to make to suit the requirements.
Further, described wire loop is set to hollow cylinder structure.
Further, in described flexible supporting structure, be provided with air supply channel and throttle orifice, described bearing shell is provided with air cavity.
Further, described air cavity is dissymmetrical structure.
The technical solution adopted in the present invention has following beneficial effect:
The form that the present invention adopts flexible tilting bush structure and wire loop to be arranged in parallel, makes bearing have the characteristic of high rigidity and high damping simultaneously, improves the bearing capacity of bearing, reduces the vibratory impulse of bearing, improve the reliability of bearing simultaneously.When bearing normally works, wedge shape air film can be formed at the fitting surface of each bearing shell and axle, substantially increase the operation stability of bearing.Meanwhile, the bearing shell on bearing support can rotate and move radially under the effect of gas film pressure, and flexible tilting bush structure can produce distortion, and now bearing shell can be oppressed wire loop and made it produce distortion, thus jointly for bearing provides yielding support.Flexible tilting bush structure has the characteristic that rigidity is large, damping is little, and wire loop has damping is large, rigidity is little attribute, under the acting in conjunction of flexible tilting bush structure and wire loop, both stiffness characteristics and damping characteristic superpose mutually, and pneumatic bearing just has the characteristic of high rigidity and high damping simultaneously.
Compared with existing pneumatic bearing, the elastic composite supporting structure that the present invention proposes improves bearing damp and stiffness characteristics, significantly improve the bearing capacity of bearing and relax the ability of impact shock, also improving the problem of gas bearing poor reliability to a certain extent.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of radial elastic pneumatic bearing of the present invention;
A kind of structural representation of bearing support of Fig. 2 for providing in first embodiment of the invention;
A kind of bearing support partial structurtes schematic diagram of Fig. 3 for providing in first embodiment of the invention;
Fig. 4 is the structural representation of the wire loop of radial elastic pneumatic bearing of the present invention;
The structural representation of another kind of bearing support of Fig. 5 for providing in second embodiment of the invention;
The partial structurtes schematic diagram of another kind of bearing support of Fig. 6 for providing in second embodiment of the invention;
Fig. 7 is that bearing support of the present invention matches with wire loop schematic diagram;
In figure: 1. wire loop, 2. bearing support, 3. bearing shell, 4. flexible supporting structure, 5. air supply channel, 6. throttle orifice, 7. air cavity.
Embodiment
Below in conjunction with the drawings and the specific embodiments, the present invention is described in further detail.But be understandable that, following embodiment is 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 pneumatic bearing, comprise: bearing support 2, wire loop 1 and flexible tilting bush structure, described bearing support 2 and wire loop 1 adopt coaxial setting, be arranged in the annular groove at bearing support 2 two ends by wire loop 1 symmetry of two same sizes, described flexible tilting bush structure forms primarily of bearing shell 3 and flexible supporting structure 4, described bearing shell 3 is arranged at inside bearing support 2, described bearing shell 3 is connected with bearing support 2 by flexible supporting structure 4, when bearing shell 3 is subject to radial force, bearing shell 3 meeting presses flexible supporting structure 4, thus bearing shell 3 is moved radially, described bearing shell 3 internal surface forms the fitting surface of bearing and rotating shaft.In the inside of bearing, jointly form elastic support structure by flexible tilting bush structure and wire loop.
As shown in Figure 2, described bearing support 2 is the agent structure of bearing, plays a part to install, protect and supporting; there is annular groove at described bearing support 2 two ends; the internal surface of described bearing support 2 is processed with n bearing shell 3, and the surface of described bearing shell 3 is fitting surfaces of bearing and rotating shaft, preferably carries out coating process.Shown in Fig. 3 is the partial schematic diagram of bearing support 2, and described bearing shell 3 can carry out Small-angle Rotation according to the rotation of bearing and adjust position and angle, improves the operation stability of bearing.N bearing shell on described bearing support 2 is uniformly distributed in a circumferential direction, every two adjacent central angles corresponding to bearing bush center are θ, then θ=360 °/n, flexible supporting structure 4 is β with the radial line corresponding to bearing shell 3 joint and the angle corresponding to substantially horizontal, this angle 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, the central position of bearing shell is often departed from this joint, flexible tilting bush structure and bearing support 2 have employed overall construction design, the structure which not only simplifies pneumatic bearing also avoid the impact of accumulation on bearing of assembly error, improve the precision after bearing machining.Flexible supporting structure 4 also reduces the requirement to machining accuracy, eliminate the problem occurring when traditional tilting-pad bearing intermediate bushing 3 rotates with bearing attachment position wearing and tearing, and avoid traditional tilting-pad bearing and cause the wearing and tearing between bearing shell 3 and rotating shaft because of axle thermal expansion, improve antiwhip and reliability.
Wire loop 1 as shown in Figure 4, first the metal wire knitted prepared by quality is reticulated by certain method, then the ring-type suited the requirements is made with cold punching technology, its rigidity and damping characteristic can be changed by changing the parameters such as the material of wire gaze 1, relative density, wall thickness and axial length, wire loop 1 is arranged on the groove of bearing support 2, is embedded in the two ends of bearing support 2 by two wire loop 1 symmetries.
During bearing working, the composite support structure that flexible tilting bush structure and wire loop 1 are formed, jointly for bearing provides yielding support, bearing shell 3 can rotate and move radially under the effect of gas film pressure, so just change the gap between bearing shell 3 and axle, be conducive to the formation of wedge shape air film.While bearing shell 3 on bearing support 2 rotates and moves radially under the effect of gas film pressure, bearing shell also can oppress wire loop makes it produce distortion, jointly for bearing provides yielding support simultaneously.Flexible tilting bush structure has the characteristic that rigidity is large, damping is little, and wire loop 1 has damping is large, rigidity is little attribute, under the acting in conjunction of flexible tilting bush structure and wire loop 1, both stiffness characteristics and damping characteristic superpose mutually, and pneumatic bearing just has the characteristic of high rigidity and high damping simultaneously.Also by the length of flexible supporting structure 4 in the axial length of change wire loop 1 and flexible tilting bush structure, the similar pneumatic bearing with different damping and stiffness characteristics can be obtained simultaneously.
Embodiment two
The structural representation of the another kind of bearing support provided in second embodiment of the invention is provided.
The working 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 because speed is low the air film enough separating two friction surfaces, easily occurs wearing and tearing.What adopt in embodiment two is gas hybrid bearing, not only avoid aero dynamic bearing and occur wearing and tearing in startup and docking process, and under any rotating speed, have high running accuracy and high bearing capacity.
Figure 6 shows that the partial sectional view of gas dynamic and hydrostatic bearing middle (center) bearing body, be with embodiment one difference, air supply channel 5 and throttle orifice 6 is provided with in flexible supporting structure in the present embodiment, bearing shell 3 is provided with air cavity 7, described air cavity 7 adopts dissymmetrical structure, this structure is conducive to the deflection of bearing shell 3, thus more easily forms wedge shape air film, is conducive to the distribution improving bearing shell 3 upward pressure simultaneously.During bearing working, hydrostatic bearing provides gas pressure mineralization pressure air film, with bearing load by the pump of outside.By ensureing that bearing does not also directly contact with stopping phase friction pair two surface in startup like this, avoid occurring wearing and tearing.
Described bearing body structure is while reservation pneumatic bearing high damping and high stiffness characteristics, solve bearing there will be wearing and tearing problem when axle slowly runs, extend the operating life of bearing, simultaneously because the pressure ratio on surface of friction pair is comparatively even, 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 provided with certain elasticity and damping characteristic while reservation metallic character, have employed flexible tilting bush structure for bearing simultaneously and provides rigidity.The present invention is by improving the elastic support structure of pneumatic bearing, utilize flexible tilting bush structure and the rigidity of wire loop 1 and the Overlay of damping to improve the bearing capacity of pneumatic bearing and to relax the ability of impact shock, make pneumatic bearing have good rigidity and damping, improve bearing capacity and the operation stability of bearing.
Except example set forth above, bearing support and wire loop can have different installations and fixation method, flexible tilting bush structure on bearing support and the concrete shape parameter of wire loop can design according to different situations, and the number of bearing support top bearing shell and distribution situation also can design according to different situations.Above example is only preferred embodiment of the present invention, and the simple equivalence generally done according to the claims in the present invention and invention book content changes and modifies, and all should belong to the scope that patent of the present invention covers.
Claims (9)
1. a radial elastic pneumatic bearing, it is characterized in that, comprise: bearing support (2), wire loop (1) and flexible tilting bush structure, described bearing support (2) and wire loop (1) adopt and coaxially arrange, be arranged in the annular groove at bearing support (2) two ends by wire loop (1) symmetry of two same sizes, described flexible tilting bush structure is primarily of bearing shell (3) and flexible supporting structure (4) composition, described bearing shell (3) is arranged at bearing support (2) inner side, described bearing shell (3) is connected with bearing support (2) by flexible supporting structure (4), described bearing shell (3) internal surface forms the fitting surface of bearing and rotating shaft.
2. radial elastic pneumatic bearing according to claim 1, is characterized in that, described flexible tilting bush structure and bearing support (2) adopt monolithic construction.
3. radial elastic pneumatic bearing according to claim 1, is characterized in that, described bearing shell (3) and shaft contacts surface are provided with coating.
4. the radial elastic pneumatic bearing according to claim 1 or 3, is characterized in that, described bearing shell (3) is uniformly distributed in a circumferential direction.
5. radial elastic pneumatic bearing according to claim 1, is characterized in that, described bearing shell (3) can carry out low-angle rotation.
6. radial elastic pneumatic bearing according to claim 1, is characterized in that, described wire loop (1) is reticulated by metal wire knitted, then adopts cold punching technology to make.
7. radial elastic pneumatic bearing according to claim 1, is characterized in that, described wire loop (1) is set to hollow cylinder structure.
8. radial elastic pneumatic bearing according to claim 1, it is characterized in that, be provided with air supply channel (5) and throttle orifice (6) in described flexible supporting structure (4), described bearing shell (3) be provided with air cavity (7).
9. radial elastic pneumatic bearing according to claim 8, is characterized in that, described air cavity (7) is set to dissymmetrical 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 |
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| CN104454992A true CN104454992A (en) | 2015-03-25 |
| CN104454992B CN104454992B (en) | 2017-02-15 |
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| CN201410515830.8A Active CN104454992B (en) | 2014-09-30 | 2014-09-30 | Elastic radial air bearing |
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Cited By (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 |
| CN106678233A (en) * | 2016-12-05 | 2017-05-17 | 湖南大学 | Novel active absorber based on PZT (piezoelectric ceramic) |
| JP2018028387A (en) * | 2016-08-16 | 2018-02-22 | ハミルトン・サンドストランド・コーポレイションＨａｍｉｌｔｏｎ Ｓｕｎｄｓｔｒａｎｄ Ｃｏｒｐｏｒａｔｉｏｎ | Bearing and rotary machine |
| CN108180224A (en) * | 2017-12-21 | 2018-06-19 | 南京航空航天大学 | Resilient bearing based on double retainers |
| CN108397885A (en) * | 2017-07-18 | 2018-08-14 | 奥克斯空调股份有限公司 | A kind of damping shaft, air exhausting structure and air conditioner |
| CN109163016A (en) * | 2018-08-02 | 2019-01-08 | 广东威灵电机制造有限公司 | Tilting bush formula oiliness bearing and motor |
| CN109790848A (en) * | 2016-07-26 | 2019-05-21 | 佛罗里达涡轮技术股份有限公司 | Turbocharger with oil-free hydrostatic bearing |
| CN111637149A (en) * | 2020-05-27 | 2020-09-08 | 西安交通大学 | Foil gas bearing with elastic damping structure |
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| US20030169951A1 (en) * | 2002-03-08 | 2003-09-11 | Ntt Corporation | Foil bearing and spindle device using the same |
| US20110243485A1 (en) * | 2010-03-30 | 2011-10-06 | Honda Motor Co., Ltd. | Dynamic foil gas 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 |
| CN103671545A (en) * | 2013-12-19 | 2014-03-26 | 湖南大学 | Radial elastic air bearing |
| CN103671544A (en) * | 2013-12-19 | 2014-03-26 | 湖南大学 | Radial elastic air bearing |
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2014
- 2014-09-30 CN CN201410515830.8A patent/CN104454992B/en active Active
Patent Citations (5)
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| US20030169951A1 (en) * | 2002-03-08 | 2003-09-11 | Ntt Corporation | Foil bearing and spindle device using the same |
| US20110243485A1 (en) * | 2010-03-30 | 2011-10-06 | Honda Motor Co., Ltd. | Dynamic foil gas 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 |
| CN103671545A (en) * | 2013-12-19 | 2014-03-26 | 湖南大学 | Radial elastic air bearing |
| CN103671544A (en) * | 2013-12-19 | 2014-03-26 | 湖南大学 | Radial elastic air bearing |
Cited By (13)
| 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 |
| CN109790848A (en) * | 2016-07-26 | 2019-05-21 | 佛罗里达涡轮技术股份有限公司 | Turbocharger with oil-free hydrostatic bearing |
| JP7000058B2 (en) | 2016-08-16 | 2022-02-10 | ハミルトン・サンドストランド・コーポレイション | Bearings and rotating machines |
| JP2018028387A (en) * | 2016-08-16 | 2018-02-22 | ハミルトン・サンドストランド・コーポレイションＨａｍｉｌｔｏｎ Ｓｕｎｄｓｔｒａｎｄ Ｃｏｒｐｏｒａｔｉｏｎ | Bearing and rotary machine |
| JP2022036127A (en) * | 2016-08-16 | 2022-03-04 | ハミルトン・サンドストランド・コーポレイション | Bearing and rotary machine |
| JP7350833B2 (en) | 2016-08-16 | 2023-09-26 | ハミルトン・サンドストランド・コーポレイション | Bearings and rotating machines |
| CN106678233A (en) * | 2016-12-05 | 2017-05-17 | 湖南大学 | Novel active absorber based on PZT (piezoelectric ceramic) |
| CN108397885A (en) * | 2017-07-18 | 2018-08-14 | 奥克斯空调股份有限公司 | A kind of damping shaft, air exhausting structure and air conditioner |
| 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 |
| CN108180224A (en) * | 2017-12-21 | 2018-06-19 | 南京航空航天大学 | Resilient bearing based on double retainers |
| CN108180224B (en) * | 2017-12-21 | 2019-07-19 | 南京航空航天大学 | Resilient bearing based on double retainers |
| CN109163016A (en) * | 2018-08-02 | 2019-01-08 | 广东威灵电机制造有限公司 | Tilting bush formula oiliness bearing and motor |
| CN111637149A (en) * | 2020-05-27 | 2020-09-08 | 西安交通大学 | Foil gas bearing with elastic damping structure |
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| CN104454992B (en) | 2017-02-15 |
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