CN202946545U - Aerodynamic bearing - Google Patents
Aerodynamic bearing Download PDFInfo
- Publication number
- CN202946545U CN202946545U CN 201120523023 CN201120523023U CN202946545U CN 202946545 U CN202946545 U CN 202946545U CN 201120523023 CN201120523023 CN 201120523023 CN 201120523023 U CN201120523023 U CN 201120523023U CN 202946545 U CN202946545 U CN 202946545U
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- China
- Prior art keywords
- foil
- layer
- rotor
- foil sheet
- dynamic bearing
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Abstract
The utility model relates to an aerodynamic bearing comprising an outer bearing ring, a foil sheet layer and a rotor, wherein the foil sheet layer is annularly and flatly spread in the outer bearing ring and is fixed with the outer bearing ring, the rotor is arranged in the foil sheet layer, and a tiny space exists between the rotor and the foil sheet layer; the foil sheet layer orderly consists a single-layer bottom foil sheet and a single-layer top foil sheet covering the single-layer bottom foil sheet from exterior to interior, and the bottom foil sheet is uniformly distributed in the axial direction of the rotor in a corrugated shape, and the rigidity degrees of two axial sides of the bottom foil sheet are larger than the rigidity degree of the middle part of the bottom foil sheet; and a lubricating layer is coated on the inner side of the top foil sheet. The aerodynamic bearing disclosed by the utility model has the characteristics of high bearing capacity, good stability, easiness in manufacturing and the like.
Description
Technical field
The utility model relates to a kind of aero dynamic bearing.
Background technique
The compliant foil gas hydraulic bearing is a kind of of gas bearing, it is gas bearing later development in recent years, it is to rely on the axle of rotation constantly the gas with certain viscosity to be brought into the wedge gap of convergence, because gas is compressed in the process in the wedge gap that is sucked convergence by axle rotation, and generation air film power, when air film power on loading direction is enough to energy balance external load, just formed a complete pressure air film between axle and bearing, the surface of bearing and axle is disengaged, form the scrubbed gas friction.Due to this mechanism, elastic foil bearing has the advantages such as operating temperature range is wide, speed is high, frictional loss is little, is specially adapted to high-speed rotating machine.
In the unrivaled advantage in high-speed rotating machine field, it has obtained the great attention of the developed countries such as American and Britain in view of the foil gas hydraulic bearing, and wherein this technology of the U.S. is the most advanced, has entered commercial stage in a plurality of fields.Domestic also have some universities, scientific research institutions and enterprise in the development work of carrying out this respect.
Present foil gas hydraulic bearing is polylith paillon foil bridging arrangement, consisted of by the stack of top foil and multilayer bottom paillon foil, the technological difficulties that run into be mainly foil gas bearing low bearing capacity, the low speed start-stop stage is large to the frictional force of paillon foil, the life-span is short, poor stability and be not easy to make etc.
Summary of the invention
The utility model is poor and be not easy to the shortcoming such as manufacturing for the low bearing capacity, the property stablized that solve existing foil gas bearing, and then a kind of novel aero dynamic bearing is provided.
Technical solution of the present utility model is: pneumatic bearing comprises outer race, foil layer and rotor, described foil layer annular flat is layered in outer race and fixes with outer race, rotor at foil layer inner and and foil layer between have small gap; Described foil layer ecto-entad is respectively the bottom paillon foil of individual layer, the top foil of individual layer, and described bottom paillon foil is greater than the rigidity of centre along the uniform rigidity of corrugated and axial both sides that is of rotor axial; Described top foil inboard scribbles lubricating layer; Means of fixation between described foil layer and outer race can be for being provided with axial groove on outer race, an end that is subjected to pulling force when rotor of described paillon foil is fixed on groove by the pretension pin, the minimum air void point that the position of described groove forms when bearing working is between 70～110 degree along the opposite direction of rotor, is preferably 90 degree.The ripple gap ratio of the both sides of described bottom paillon foil is broad in the middle; The lubricating layer that described top foil is coated with is molybdenum disulfide, Teflon or bronze.
During work, due to small gap being arranged between rotor and paillon foil, constantly the gas with certain viscosity is brought into the wedge gap of convergence during rotor, because gas is compressed the air film power that produces in the wedge gap, when air film power on loading direction is enough to energy balance external load, the surface of bearing and axle disengages, and forms the scrubbed gas friction.
The ripple gap ratio of the both sides of two end regions of bottom paillon foil of the present utility model is broad in the middle, make the rigidity of both sides greater than the rigidity of centre, can effectively resist the infringement that rotor causes due to bending, shake, decentraction at the volley, the depression of bearing force of avoiding the reduction of two ends gas film pressure to cause; The design of employing monolithic bottom paillon foil and monolithic top foil greatly reduces the difficulty of manufacturing; Adopt corrugated bottom paillon foil and certain elasticity arranged, in the time of can avoiding the rotor high-speed rotation to impact and the infringement of structure; Adopt fixedly paillon foil of groove and pretension pin mechanism, can prevent paillon foil movement at work, thereby improve the stability of foil bearing work, simple in structure, reliable performance, when selecting the optimum position of groove effectively to resist rotor to the infringement of paillon foil; Top foil with lubricant coating can significantly reduce the starting and stopping stage to the frictional loss of bearing, thereby improves the life-span.
Description of drawings
Fig. 1 is compliant foil gas hydraulic bearing schematic diagram;
Fig. 2 is bottom paillon foil schematic diagram;
Fig. 3 is the partial enlarged drawing of Fig. 1.
Embodiment
As shown in the figure, aero dynamic bearing comprises outer race 2, foil layer and rotor 1, and described foil layer annular flat is layered in outer race 2 and is fixing with outer race 2, rotor 1 at foil layer inner and and foil layer between have small gap; Described foil layer ecto-entad is respectively the bottom paillon foil 3 of individual layer, the top foil 4 of individual layer, and described bottom paillon foil 3 is greater than the rigidity of centre along the uniform rigidity of corrugated and axial both sides that is of rotor axial; Described top foil 4 inboards scribble lubricating layer; Means of fixation between described foil layer and outer race 2 can be for being provided with axial groove on outer race, an end that is subjected to pulling force when rotor of described paillon foil is fixed on groove by pretension pin 5, the minimum air void point that the position of described groove forms when bearing working is between 70～110 degree along the opposite direction of rotor, is preferably 90 degree.The ripple gap ratio of the both sides of described bottom paillon foil 3 is broad in the middle; The lubricating layer that described top foil 4 is coated with is molybdenum disulfide, Teflon or bronze.
Embodiment one
A kind of miniature gas turbine generator set vane rotor bearing, comprise outer race, foil layer and rotor, described foil layer annular flat is layered in outer race and fixes with outer race, rotor at foil layer inner and and foil layer between have small gap; Described foil layer ecto-entad is respectively the top foil of the individual layer that the bottom paillon foil of individual layer covers on it; The ripple gap ratio of the both sides of described bottom paillon foil is broad in the middle.Described top foil inboard scribbles one deck Teflon; Means of fixation between described foil layer and outer race can be for being provided with axial groove on outer race, an end that is subjected to pulling force when rotor of described paillon foil is fixed on groove by the pretension pin, and the minimum air void point that the position of described groove forms when being positioned at bearing working is 90 degree along the opposite direction of rotor.
Claims (8)
1. aero dynamic bearing, it is characterized in that, aero dynamic bearing comprises outer race (2), foil layer and rotor (1), described foil layer is tiled in outer race (2) and is fixing with outer race (2), rotor (1) at foil layer inner and and foil layer between have small gap; Described foil layer ecto-entad is respectively the bottom paillon foil (3) of individual layer, the top foil (4) of individual layer, and described bottom paillon foil (3) is greater than the rigidity of centre along the uniform rigidity of corrugated and axial both sides that is of rotor axial; Described top foil (4) inboard scribbles lubricating layer.
2. aero dynamic bearing as claimed in claim 1, it is characterized in that, means of fixation between described foil layer and outer race (2) is to be provided with axial groove on outer race, and an end that is subjected to pulling force when rotor of described paillon foil is fixed on groove by pretension pin (5).
3. aero dynamic bearing as claimed in claim 2, is characterized in that, the minimum air void point that the position of described groove forms when bearing working is between 70～110 degree along the opposite direction of rotor.
4. aero dynamic bearing as claimed in claim 3, is characterized in that, the minimum air void point that the position of described groove forms when being positioned at bearing working is 90 degree along the opposite direction of rotor.
5. aero dynamic bearing as claimed in claim 1, is characterized in that, the ripple gap ratio of the both sides of described bottom paillon foil (3) is broad in the middle.
6. aero dynamic bearing as claimed in claim 1, is characterized in that, the lubricating layer that described top foil (4) is coated with is molybdenum disulfide.
7. aero dynamic bearing as claimed in claim 1, is characterized in that, the lubricating layer that described top foil (4) is coated with is Teflon.
8. aero dynamic bearing as claimed in claim 1, is characterized in that, the lubricating layer that described top foil (4) is coated with is bronze.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120523023 CN202946545U (en) | 2011-12-13 | 2011-12-13 | Aerodynamic bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120523023 CN202946545U (en) | 2011-12-13 | 2011-12-13 | Aerodynamic bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202946545U true CN202946545U (en) | 2013-05-22 |
Family
ID=48422250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120523023 Expired - Fee Related CN202946545U (en) | 2011-12-13 | 2011-12-13 | Aerodynamic bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202946545U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102562801A (en) * | 2011-12-13 | 2012-07-11 | 哈尔滨东安发动机（集团）有限公司 | Aerodynamic bearing |
| CN106015315A (en) * | 2016-08-04 | 2016-10-12 | 江苏亚星波纹管有限公司 | Corrugated tube bearing device |
| CN110242671A (en) * | 2019-05-17 | 2019-09-17 | 北京科技大学 | A kind of cone foil dynamical pressure air bearing |
-
2011
- 2011-12-13 CN CN 201120523023 patent/CN202946545U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102562801A (en) * | 2011-12-13 | 2012-07-11 | 哈尔滨东安发动机（集团）有限公司 | Aerodynamic bearing |
| CN102562801B (en) * | 2011-12-13 | 2017-02-08 | 哈尔滨东安发动机（集团）有限公司 | Aerodynamic bearing |
| CN106015315A (en) * | 2016-08-04 | 2016-10-12 | 江苏亚星波纹管有限公司 | Corrugated tube bearing device |
| CN110242671A (en) * | 2019-05-17 | 2019-09-17 | 北京科技大学 | A kind of cone foil dynamical pressure air bearing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130522 Termination date: 20161213 |