CN101625011A - Tilting-pad radial dynamic pressure gas bearing with multiple-rigidity - Google Patents
Tilting-pad radial dynamic pressure gas bearing with multiple-rigidity Download PDFInfo
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- CN101625011A CN101625011A CN200910023491A CN200910023491A CN101625011A CN 101625011 A CN101625011 A CN 101625011A CN 200910023491 A CN200910023491 A CN 200910023491A CN 200910023491 A CN200910023491 A CN 200910023491A CN 101625011 A CN101625011 A CN 101625011A
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- 230000008901 benefit Effects 0.000 abstract description 6
- 238000013016 damping Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 4
- 239000012634 fragment Substances 0.000 description 3
- 230000002706 hydrostatic effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001914 calming effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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Abstract
The invention relates to a tilting-pad radial dynamic pressure gas bearing with multiple-rigidity. An elastic element with a fixed end and a freed end and a limit screw are used as the structure generating multiple-deformation; when bearing initial loading, the elastic element generate primary deformation and first heavy rigidity; when loading is further increased, secondary deformation is taken place and the multi-rigidity is generated. The bearing overcomes the shortcomings of single rigidity and damping of the existing tilting-pad radial gas bearing, strengths the stable performance and application range of the tilting-pad radial gas bearing, has the advantages of easy processing and assembling, capable of being loaded in advance, controllable bearing rigidity, good stability and insensitive to the concentricity of the shaft, and the like, and conveniently exchange with the existing radial gas bearing.
Description
Technical field
The invention belongs to the hydrodynamic gas-lubricated bearing field in the Machine Design, particularly a kind of tilting-pad radial dynamic pressure gas bearing that is applicable to high rate turbine machinery with multiple-rigidity.
Background technique
Gas bearing is a kind of fluid film lubricating bearings that adopts gas as lubricant medium, promptly forms air film between axle and bearing, makes moving surface and stationary face avoid taking place directly to contact.The method that gas bearing adopted is to utilize the viscosity of gas to improve pressure in the bearing play, thereby object is floated.
Gas bearing can be divided into hydrostatic gas-lubricated bearing and hydrodynamic gas-lubricated bearing according to its carrying principle.Hydrostatic bearing is to make the gas of pressurization import the gap from the outside through flow controller, produces static pressure and a kind of form of object being floated come in the gap.When the effect of throttling is that the bearing play changes, change the pressure in the gap.Dynamic pressure type gas bearing pair has two surfaces that relatively move, and is called as the gap of wedge shape in addition.When hydraulic bearing is worked, when the shape in gap when movement direction is tending towards narrowing down gradually or totally because the relatively moving of rubbing surface, gas is driven because of the viscous effect of itself, and is compressed in the wedge gap, has produced pressure field thus.But hydrostatic gas-lubricated bearing needs a cover air supply system, has increased the complexity of device, and needs to consume a certain amount of pressed gas, and this has limited its application.Compare with the static pressure type gas bearing, hydrodynamic gas-lubricated bearing does not need external air source, but has relative movement between two surfaces of requirement formation wedge gap, and its dynamic pressure effect is obvious further with the increase of speed of related movement.This specific character is very favourable for the structure that has relative motion surface.Adopt hydrodynamic gas-lubricated bearing then to need not air supply system, greatly simplification device has obvious energy-saving effect and good economic benefit, and can further expand the application area of gas bearing.
According to the direction of load, gas bearing can be divided into the combination bearing that radial bearing and thrust bearing and both have concurrently.Can incline watt dynamical pressure radial gas bearing provided is a kind of in the radial bearing, also is the comparatively ripe a kind of gas bearing of development at present.Watt each the dynamical pressure radial gas bearing provided sheet bearing shell that can incline is evenly arranged at circumferencial direction.Because pivot one end is processed to sphere, so each bearing shell can be that multi-direction rotation is done at the center with the fulcrum, forms the wedge shape of calming the anger with rotor.When microvariations are born by system, ignore the inertia of bearing shell, each sheet bearing shell can be made corresponding reaction balance with it immediately according to the size of disturbing quantity, from and get back to steady state.Tilting-pad radial gas bearing tile fragment number can change, and commonly used is three.At present external tilting-pad radial dynamic pressure gas bearing has had comparatively ripe application, is mainly used in large high-speed rotating machinery and the turbomachinery.
The absorbing vibration ability that tilting-pad radial dynamic pressure gas bearing has general elastic structure hydrodynamic gas-lubricated bearing is strong, shock-resistant, compensate machining error automatically, can adapt to certain stress deformation and thermal distortion, stable advantages of higher.But traditional tilting-pad radial gas bearing relies on tile fragment back side elastic steel sheet once to be out of shape yielding support is provided, distortion relies on big to structure, and rigidity, damping are undesirable, assembly performance is poor, show that bearing itself adapts to being limited in scope of load and rotating speed, has limited its deep application in high-speed rotating machine.Therefore development have multiple-rigidity can adapt to the different loads scope and have good assembly performance and stability incline watt dynamical pressure radial gas bearing provided just very necessary.
Summary of the invention
The object of the present invention is to provide a kind of multiple-rigidity that has, can give full play to the advantage of tilting-pad bearing, can adapt to wideer load range again, can produce multiple-rigidity and damping, obtain having the tilting-pad radial dynamic pressure gas bearing with multiple-rigidity of yielding support performance and dynamic characteristic preferably.
For achieving the above object, the technical solution used in the present invention is: comprise bearing support and be arranged on the interior axle of bearing support, be evenly equipped with three groups of radially bearing shells in the outside of axle, bearing support is provided with and the corresponding pivot of bearing shell radially, be set with elastic element on the pivot, be characterized in, said elastic element one end is fixed on the bearing support by attachment screw, the other end fixedly makes elastic element form semi-free state by limit stoper, and limit stoper has certain free height to be made the elastic element of the semi-free state of its lower end have deformation, lift the space with slippage.
Limit stoper employing stop screw of the present invention, position-limitting pin or the structure with identical limit function of attaching on bearing support make elastic element produce multiple-rigidity.
The metal element that the present invention is fixing originally with tilting-pad radial dynamic pressure gas bearing makes an end into fixes, the semi-free elastic element of an other end, make original attachment screw into stop screw, make it under loading, can produce the cross-elasticity distortion, thereby produce multiple-rigidity and adapt to wideer load range with different dampings, and can apply and preload, to improve the bearing capacity of bearing, stability and assembling, the present invention also can be by regulating the structural parameter of elastic element and pivot, its bearing has adjustable multiple-rigidity, and can obtain the predeformation of prestressing force load and elastic element.
Description of drawings
Fig. 1 is an overall structure schematic representation of the present invention;
Fig. 2 is the semi-free elastic element work of a present invention deformation process schematic representation, (a) original state, (b) deformation state, (c) secondary deformation state.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Referring to Fig. 1, the present invention includes bearing support 5 and be arranged on axle 6 in the bearing support 5, be evenly equipped with three groups of radially bearing shells 4 in the outside of axle 6, bearing support 5 is provided with and bearing shell 4 corresponding pivots 2 radially, be set with elastic element 3 on the pivot 2, elastic element 3 one ends are fixed on the bearing support 5 by attachment screw 1, the other end fixedly makes elastic element 3 form semi-free state by stop screw 7, and stop screw 7 has certain free height to be made the elastic element 3 of the semi-free state of its lower end have deformation, lift the space with slippage.
Referring to Fig. 2, the structure of forming by semi-free elastic element 3 and stop screw 7 that produces multiple deformation of the present invention.When turbomachinery turns round, radially bearing shell 4 with the axle 6 gap lengths along with suffered bearing capacity of bearing and the different of rotating speed change, thereby cause that pivot 2 moves up and down, the semi-free elastic element 3 that an end is connected with stop screw 7 by attachment screw 1 a fixing other end produces the resiliently deformable of multiple-rigidity owing to moving up and down of pivot 2.Do not adding under the situation of preloading, when axle rotates, it is initial that what produce is once distortion as Fig. 2 (b), when bearing load continues to increase, semi-free elastic element 3 and stop screw 7 have limited it and once have been out of shape, in order to adapt to the load of change, the secondary deformation that semi-free elastic element 3 produces as Fig. 2 (c), produce multiple-rigidity, the final load that has changed that adapts to.Semi-free elastic element 3 can recover again once to be out of shape or as the original state of Fig. 2 (a) when load reduces.So go round and begin again, final rotor-bearing system can reach one and have the transient equiliblium that multiple-rigidity can adapt to the load range of more widening.This bearing also can apply prestressing force load according to actual conditions, by adjusting pivot length, makes the semi-free elastic element distortion of bearing directly enter the multiple-rigidity scope.The present invention is applicable to watt hydrodynamic gas-lubricated bearing that inclines of different tile fragment numbers.
Advantage of the present invention is mainly reflected in simple in structure, is convenient to realize, can give full play to tradition and can incline watt The advantage of bearing has been improved again damping, rigidity and the dynamic characteristic of bearing greatly. Because flexible member can produce Give birth to multiple-rigidity its deformation range is increased, thereby go for more broad condition range. And namely Rotor and bearing surface are rubbed, and flexible member also can come adaptive system by large-scale adjustment, and is big Reduced greatly the stuck phenomenon that causes axle and bearing shell surface abrasion of Rotor-Bearing System. In addition, change elasticity unit The thickness of part and form, the perhaps length of spacing section of stop screw can change damping and the rigidity model of bearing Enclose, thereby it is watt dynamical pressure radial gas bearing provided to obtain inclining of different bearer power and stability; Simultaneously, by changing Becoming the elastic construction parameter or changing its installment state to provide prestressing force load into bearing, and this is also favourable In the adjusting of bearing rigidity and the raising of stability.
Claims (2)
1, a kind of tilting-pad radial dynamic pressure gas bearing with multiple-rigidity, comprise bearing support (5) and be arranged on the interior axle (6) of bearing support (5), be evenly equipped with three groups of radially bearing shells (4) in the outside of axle (6), bearing support (5) is provided with and the corresponding pivot of bearing shell (4) (2) radially, be set with elastic element (3) on the pivot (2), it is characterized in that: said elastic element (3) one ends are fixed on the bearing support (5) by attachment screw (1), the other end fixedly makes elastic element (3) form semi-free state by limit stoper (7), and limit stoper (7) has certain free height makes the elastic element (3) of the semi-free state of its lower end have deformation, lift space with slippage.
2, the tilting-pad radial dynamic pressure gas bearing with multiple-rigidity according to claim 1 is characterized in that: said limit stoper (7) adopts stop screw, position-limitting pin or goes up the subsidiary structure with identical limit function at bearing support (5) and makes elastic element (3) produce multiple-rigidity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100234910A CN101625011B (en) | 2009-08-04 | 2009-08-04 | Tilting-pad radial dynamic pressure gas bearing with multiple-rigidity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100234910A CN101625011B (en) | 2009-08-04 | 2009-08-04 | Tilting-pad radial dynamic pressure gas bearing with multiple-rigidity |
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| Publication Number | Publication Date |
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| CN101625011A true CN101625011A (en) | 2010-01-13 |
| CN101625011B CN101625011B (en) | 2011-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100234910A Active CN101625011B (en) | 2009-08-04 | 2009-08-04 | Tilting-pad radial dynamic pressure gas bearing with multiple-rigidity |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106369050A (en) * | 2016-09-13 | 2017-02-01 | 安徽工程大学 | Magnetic suspension aerodynamic bearing |
| CN109765002A (en) * | 2018-12-11 | 2019-05-17 | 中国航空工业集团公司北京长城计量测试技术研究所 | A kind of Combined static-pressure air-bearing supporting device |
| CN110809677A (en) * | 2017-06-29 | 2020-02-18 | 罗伯特·博世有限公司 | Method for producing a component of a tilting pad bearing and tilting pad bearing |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5324625Y2 (en) * | 1974-01-24 | 1978-06-23 |
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2009
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106369050A (en) * | 2016-09-13 | 2017-02-01 | 安徽工程大学 | Magnetic suspension aerodynamic bearing |
| CN110809677A (en) * | 2017-06-29 | 2020-02-18 | 罗伯特·博世有限公司 | Method for producing a component of a tilting pad bearing and tilting pad bearing |
| CN110809677B (en) * | 2017-06-29 | 2022-04-01 | 罗伯特·博世有限公司 | Method for producing a component of a tilting pad bearing and tilting pad bearing |
| US11306779B2 (en) | 2017-06-29 | 2022-04-19 | Robert Bosch Gmbh | Method for producing components of a tilting-pad bearing, and tilting-pad bearing |
| CN109765002A (en) * | 2018-12-11 | 2019-05-17 | 中国航空工业集团公司北京长城计量测试技术研究所 | A kind of Combined static-pressure air-bearing supporting device |
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| Publication number | Publication date |
|---|---|
| CN101625011B (en) | 2011-06-01 |
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Inventor after: Hou Yu Inventor after: Chen Shuangtao Inventor after: Zhang Qiaoyu Inventor after: Zhao Hongli Inventor after: Liu Xiufang Inventor after: Liu Changhai Inventor after: Ma Juanli Inventor before: Hou Yu Inventor before: Chen Shuangtao Inventor before: Zhang Qiaoyu Inventor before: Zhao Hongli |
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Effective date of registration: 20190529 Address after: 721499 Changqing Industrial Park, Fengxiang County, Baoji City, Shaanxi Province Patentee after: Shaanxi Baosteel Gases Co., Ltd. Address before: Room 902, Yongda International Building, 2277 Longyang Road, Shanghai, 20104 Patentee before: Shanghai Baosteel Gas Co., Ltd. |
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