CN103291750B - The elastic foil gas bearing that a kind of pretension is adjustable - Google Patents
The elastic foil gas bearing that a kind of pretension is adjustable Download PDFInfo
- Publication number
- CN103291750B CN103291750B CN201310173425.8A CN201310173425A CN103291750B CN 103291750 B CN103291750 B CN 103291750B CN 201310173425 A CN201310173425 A CN 201310173425A CN 103291750 B CN103291750 B CN 103291750B
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- China
- Prior art keywords
- cylindrical surface
- elastic foil
- inner cylindrical
- foil gas
- bearing
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Classifications
-
- 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
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
- F16C17/024—Sliding-contact bearings for exclusively rotary movement for radial load only with flexible leaves to create hydrodynamic wedge, e.g. radial foil bearings
-
- 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
- F16C25/00—Bearings for exclusively rotary movement adjustable for wear or play
- F16C25/02—Sliding-contact bearings
- F16C25/04—Sliding-contact bearings self-adjusting
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Support Of The Bearing (AREA)
Abstract
The elastic foil gas bearing that a kind of pretension is adjustable, bearing support is the segmental cylindrical tile structure of circumference distribution, and screw connection by bolt, axle is arranged on bearing support and is in turn connected to form in an overall inner cylindrical surface, the axle journal of axle and bearing support are formed between an overall inner cylindrical surface and are provided with elastic foil gas bearing, after the raising of rotating speed, axle journal departs from the 3rd inner cylindrical surface surface of elastic foil gas bearing, after gas lubrication film is formed, elastic foil gas bearing provides certain support stiffness and damping for axle, make the arch paper tinsel of elastic foil gas bearing be out of shape simultaneously, slide at the first inner cylindrical surface of bearing support, and the tension force of spring can hold elastic foil gas bearing, 3rd inner cylindrical surface of elastic foil gas bearing is straightened, axle journal place toward axle is close, thus have adjusted the pretightening force of elastic foil gas bearing and the load of self adaption axle, there is structure simple, adaptive feature.
Description
Technical field
The invention belongs to elastic foil bearing technical field, the elastic foil gas bearing that particularly a kind of pretension is adjustable.
Background technique
Elastic foil bearing has good adaptivity, can long-time running under high temperature, high speed and high pollution condition, and do not need the auxiliary device such as fuel feeding or control system, therefore structure is simple.Existing elastic foil bearing is lower due to the rigidity of its bearing ripple paper tinsel, can not bear larger load.Increasing bearing pre-tightened is one of current comparatively popular method, but is usually difficult to accomplish that in use pretension is adjustable, cannot meet the requirement of self adaption various working in reality.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the object of the present invention is to provide the elastic foil gas bearing that a kind of pretension is adjustable, pretension is adjustable, has simple, the adaptive feature of structure.
To achieve these goals, the technical solution used in the present invention is:
The elastic foil gas bearing that a kind of pretension is adjustable, include plural bearing support 1, bearing support 1 is the segmental cylindrical tile structure of circumference distribution, its internal diameter is 20 ~ 80mm, there are two boss 9 end at the position, two diagonal angles of bearing support 1, the first through hole 6 is had in boss 9, there are two grooves 10 end at two other position, diagonal angle of bearing support 1, tapped hole 7 is had in groove 10, two the first external cylindrical surfaces 8 are arranged with between first inner cylindrical surface 11 of bearing support 1 and the second external cylindrical surface 12, first through hole 6 overlaps the groove upper screwed hole 7 of next bearing support 1 successively, and screw connection by bolt 5, the first inner cylindrical surface 11 that axle 2 is arranged on bearing support 1 is in turn connected to form in an overall inner cylindrical surface, the axle journal 13 of axle 2 and the first inner cylindrical surface 11 of bearing support 1 are formed successively between an overall inner cylindrical surface and are provided with elastic foil gas bearing 3, elastic foil gas bearing 3 is a kind of paillon foil, its bending two ends are arranged with two and ranked second through hole 14, the second inner cylindrical surface 15 is provided with between second through hole 14, second inner cylindrical surface 15 is nested on two the first external cylindrical surfaces 8 of bearing support 1, strain with the spring 4 be fitted on the second external cylindrical surface 12 of bearing support 1 outside two the second through holes 14, be provided with the 3rd oppositely tangent inner cylindrical surface 19 of two the second inner cylindrical surfaces 15 between two the second inner cylindrical surfaces 15 of elastic foil gas bearing 3, the diameter of the 3rd inner cylindrical surface 19 is greater than the first inner cylindrical surface 11 of bearing support 1, the axle journal 13 of axle 2 is nested on the arc inner chamber that is made up of the 3rd inner cylindrical surface 19 of plural elastic foil gas bearing 3, at least three row's arch paper tinsels are provided with in 3rd inner cylindrical surface 19 of elastic foil gas bearing 3, be followed successively by the first arch paper tinsel 16, second arch paper tinsel 17 and the 3rd arch paper tinsel 18, first arch paper tinsel 16, the end of the second arch paper tinsel 17 and the 3rd arch paper tinsel 18 is all fitted on the first inner cylindrical surface 11 of bearing support 1.
Described bearing support 1 thickness 10 ~ 20mm, width 20 ~ 100mm; The number m of bearing support 1 is 2,3,4,5 or 6, its circumferential angle n, n=360/m-10 °; The material of bearing support 1 is 40Cr, hardness 45HRC.
The diameter of the first described through hole 6 is 5 ~ 8mm.
The nominal diameter of described tapped hole 7 is M3 ~ 8mm.
The diameter of the first described external cylindrical surface 8 is 5 ~ 10mm.
The material of described axle 2 is GH4169, and there is high-temperature coating PS304 on surface, hardness 50HRC.
The thickness of described elastic foil gas bearing 3 is 0.1 ~ 0.4mm, and material is GH4145 or stainless steel, hardness 30HRC.
The quantity of the second described through hole 14 is 4,6 or 8.
The first described arch paper tinsel 16, second encircles paper tinsel 17, the quantity of the 3rd arch paper tinsel 18 is 4,6,8,10,12 or 14.
Because the present invention is by the groove upper screwed hole 7 having the first through hole 6 on the boss 9 of plural bearing support 1 to overlap next bearing support 1 successively, and screw connection by bolt 5, the first inner cylindrical surface 11 that axle 2 is arranged on bearing support 1 is formed in an overall inner cylindrical surface successively, the axle journal 13 of axle 2 and the first inner cylindrical surface 11 of bearing support 1 are formed successively between an overall inner cylindrical surface and are provided with elastic foil gas bearing 3, have the following advantages:
The first, pretension is adjustable: the bearing capacity of traditional elastic foil gas bearing is generally on the low side, and the present invention is by the pretension effect of spring, and elastic foil bearing can be made to have certain pretension effect, and this can improve the bearing capacity of bearing significantly.
The second, structure is simple: compared with traditional elastic foil gas bearing, and the present invention adopts tensioned structure, and bearing support adopts and overlaps bolt connection successively, and structure is very simple, thus avoids traditional elastic gas foil bearing for installing and fixing requirement.
3rd, self adaption: in the process of axle running, due to the change of residing working state, needs the performance of corresponding elastic foil gas bearing also to have respective change to adapt to it, and arch paper tinsel can recover voluntarily after resiliently deformable, thus improve the stability of elastic foil gas bearing.
Accompanying drawing explanation
Fig. 1 is overall structure figure of the present invention.
Fig. 2 is left view of the present invention.
Fig. 3 is sectional view of the present invention.
Fig. 4 is the schematic diagram of bearing support 1 of the present invention, and wherein Fig. 4 (a) is the plan view of bearing support 1; Fig. 4 (b) is the left view of bearing support 1; Fig. 4 (c) is the sectional view of bearing support 1; Fig. 4 (d) is the normal axomometric drawing of bearing support 1.
Fig. 5 is the schematic diagram of elastic foil gas bearing 3 of the present invention, and wherein Fig. 5 (a) is the plan view of elastic foil gas bearing 3; Fig. 5 (b) is the sectional view of elastic foil gas bearing 3; Fig. 5 (c) is the plan view of elastic foil gas bearing 3.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
See Fig. 1, Fig. 2 and Fig. 3, the elastic foil gas bearing that a kind of pretension is adjustable, include plural bearing support 1, bearing support 1 is the segmental cylindrical tile structure of circumference distribution, its internal diameter is 20 ~ 80mm, the first through hole 6 on the boss 9 of bearing support 1 overlaps the groove upper screwed hole 7 of next bearing support 1 successively, and screw connection by bolt 5, the first inner cylindrical surface 11 that axle 2 is arranged on bearing support 1 is formed in an overall inner cylindrical surface successively, the axle journal 13 of axle 2 and the first inner cylindrical surface 11 of bearing support 1 are formed successively between an overall inner cylindrical surface and are provided with elastic foil gas bearing 3.
See Fig. 4, there are two boss 9 end at the position, two diagonal angles of bearing support 1, the first through hole 6 is had in boss 9, there are two grooves 10 end at two other position, diagonal angle of bearing support 1, tapped hole 7 is had in groove 10, for being arranged with two the first external cylindrical surfaces 8 between first inner cylindrical surface 11 of bearing support 1 and the second external cylindrical surface 12, the first through hole 6 on the boss 9 of bearing support 1 overlaps the groove upper screwed hole 7 of next bearing support 1 successively, and screws connection by bolt 5.
See Fig. 1, 2, 3, 4 and 5, elastic foil gas bearing 3 is a kind of paillon foil, its bending two ends are arranged with two and ranked second through hole 14, the second inner cylindrical surface 15 is provided with between second through hole 14, second inner cylindrical surface 15 is nested on two the first external cylindrical surfaces 8 of bearing support 1, strain with the spring 4 be fitted on the second external cylindrical surface 12 of bearing support 1 outside two the second through holes 14, be provided with the 3rd oppositely tangent inner cylindrical surface 19 of two the second inner cylindrical surfaces 15 between two the second inner cylindrical surfaces 15, the diameter of the 3rd inner cylindrical surface 19 is greater than the first inner cylindrical surface 11, axle journal 13 is nested on the arc inner chamber that is made up of the 3rd inner cylindrical surface 19 of plural elastic foil gas bearing 3, at least three row's arch paper tinsels are provided with in 3rd inner cylindrical surface 19 of elastic foil gas bearing 3, be followed successively by the first arch paper tinsel 16, second arch paper tinsel 17 and the 3rd arch paper tinsel 18, first arch paper tinsel 16, the end of the second arch paper tinsel 17 and the 3rd arch paper tinsel 18 is all fitted on the first inner cylindrical surface 11 of bearing support 1.
Described bearing support 1 thickness 10 ~ 20mm, width 20 ~ 100mm; The number m of bearing support 1 is 2,3,4,5 or 6, its circumferential angle n, n=360/m-10 °; The material of bearing support 1 is 40Cr, hardness 45HRC.
The diameter of the first described through hole 6 is 5 ~ 8mm.
The nominal diameter of described tapped hole 7 is M3 ~ 8mm.
The diameter of the first described external cylindrical surface 8 is 5 ~ 10mm.
The material of described axle 2 is GH4169, and there is high-temperature coating PS304 on surface, hardness 50HRC.
The thickness of described elastic foil gas bearing 3 is 0.1 ~ 0.4mm, and material is GH4145 or stainless steel, hardness 30HRC.
The quantity of the second described through hole 14 is 4,6 or 8.
The first described arch paper tinsel 16, second encircles paper tinsel 17, the quantity of the 3rd arch paper tinsel 18 is 4,6,8,10,12 or 14.
Working principle of the present invention:
For being arranged with two the first external cylindrical surfaces 8 between first inner cylindrical surface 11 of bearing support 1 and the second external cylindrical surface 12, the first through hole 6 on the boss 9 of bearing support 1 overlaps the groove upper screwed hole 7 of next bearing support 1 successively, and screw connection by bolt 5, the external cylindrical surface 8 of bearing support 1 and the inner cylindrical surface 10 of flexible gas foil bearing 3 are strained by spring 4, be arranged on outside axle 2, when axle 2 rotates, the axle journal 13 of axle 2 from be fitted on the 3rd inner cylindrical surface 19 of elastic foil gas bearing 3, first arch paper tinsel 16 of elastic foil gas bearing 3, second arch paper tinsel 17 and the 3rd arch paper tinsel 18 are pressed on the first inner cylindrical surface 11 of bearing support 1, after the raising of rotating speed, after reaching certain departure rotary speed, the axle journal 13 of axle 2 departs from the 3rd inner cylindrical surface 19 surface of elastic foil gas bearing 3, according to Elastic fluid lubrication theory, after gas lubrication film is formed, elastic foil gas bearing 3 starts normal work, for axle 2 provides certain support stiffness and damping, simultaneously, due to the effect of gas lubrication film, make the first arch paper tinsel 16 of elastic foil gas bearing 3, second arch paper tinsel 17 and the 3rd arch paper tinsel 18 are out of shape, slide at the first inner cylindrical surface 11 of bearing support 1, and the tension force of spring 4 can hold elastic foil gas bearing 3 second through hole 14, 3rd inner cylindrical surface 19 of elastic foil gas bearing 3 is straightened, axle journal 13 place toward axle 2 is close, thus have adjusted the pretightening force of elastic foil gas bearing 3 and the load of self adaption axle 2.
Claims (9)
1. the elastic foil gas bearing that a pretension is adjustable, include plural bearing support (1), it is characterized in that: bearing support (1) is the segmental cylindrical tile structure of circumference distribution, its internal diameter is 20 ~ 80mm, there are two boss (9) end at the position, two diagonal angles of bearing support (1), the first through hole (6) is had in boss (9), there are two grooves (10) end at two other position, diagonal angle of bearing support (1), tapped hole (7) is had in groove (10), two the first external cylindrical surfaces (8) are arranged with between first inner cylindrical surface (11) of bearing support (1) and the second external cylindrical surface (12), first through hole (6) overlaps the groove upper screwed hole (7) of next bearing support (1) successively, and screw connection by bolt (5), the first inner cylindrical surface (11) that axle (2) is arranged on bearing support (1) is in turn connected to form in an overall inner cylindrical surface, the axle journal (13) of axle (2) and first inner cylindrical surface (11) of bearing support (1) are formed successively between an overall inner cylindrical surface and are provided with elastic foil gas bearing (3), elastic foil gas bearing (3) is a kind of paillon foil, its bending two ends are arranged with two and ranked second through hole (14), the second inner cylindrical surface (15) is provided with between second through hole (14), second inner cylindrical surface (15) is nested on two the first external cylindrical surfaces (8) of bearing support (1), two the second through hole (14) outside spring (4) tensions be fitted on second external cylindrical surface (12) of bearing support (1), be provided with the 3rd oppositely tangent inner cylindrical surface (19) of two the second inner cylindrical surfaces (15) between two the second inner cylindrical surfaces (15) of elastic foil gas bearing (3), the diameter of the 3rd inner cylindrical surface (19) is greater than the diameter of first inner cylindrical surface (11) of bearing support (1), the axle journal (13) of axle (2) is nested on the arc inner chamber that is made up of the 3rd inner cylindrical surface (19) of plural elastic foil gas bearing (3), at least three row's arch paper tinsels are provided with in 3rd inner cylindrical surface (19) of elastic foil gas bearing (3), be followed successively by the first arch paper tinsel (16), second arch paper tinsel (17) and the 3rd arch paper tinsel (18), first arch paper tinsel (16), the end of the second arch paper tinsel (17) and the 3rd arch paper tinsel (18) is all fitted on first inner cylindrical surface (11) of bearing support (1).
2. the elastic foil gas bearing that a kind of pretension according to claim 1 is adjustable, is characterized in that: described bearing support (1) thickness 10 ~ 20mm, width 20 ~ 100mm; The number m of bearing support (1) is 2,3,4,5 or 6, its circumferential angle n, n=360/m-10 °; The material of bearing support (1) is 40Cr, hardness 45HRC.
3. the elastic foil gas bearing that a kind of pretension according to claim 1 is adjustable, is characterized in that: the diameter of described the first through hole (6) is 5 ~ 8mm.
4. the elastic foil gas bearing that a kind of pretension according to claim 1 is adjustable, is characterized in that: the nominal diameter of described tapped hole (7) is M3 ~ 8mm.
5. the elastic foil gas bearing that a kind of pretension according to claim 1 is adjustable, is characterized in that: the diameter of described the first external cylindrical surface (8) is 5 ~ 10mm.
6. the elastic foil gas bearing that a kind of pretension according to claim 1 is adjustable, is characterized in that: the material of described axle (2) is GH4169, and there is high-temperature coating PS304 on surface, hardness 50HRC.
7. the elastic foil gas bearing that a kind of pretension according to claim 1 is adjustable, is characterized in that: the thickness of described elastic foil gas bearing (3) is 0.1 ~ 0.4mm, and material is GH4145 or stainless steel, hardness 30HRC.
8. the elastic foil gas bearing that a kind of pretension according to claim 1 is adjustable, is characterized in that: the quantity of described the second through hole (14) is 4,6 or 8.
9. the elastic foil gas bearing that a kind of pretension according to claim 1 is adjustable, is characterized in that: the quantity of the first described arch paper tinsel (16), the second arch paper tinsel (17), the 3rd arch paper tinsel (18) is 4,6,8,10,12 or 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310173425.8A CN103291750B (en) | 2013-05-10 | 2013-05-10 | The elastic foil gas bearing that a kind of pretension is adjustable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310173425.8A CN103291750B (en) | 2013-05-10 | 2013-05-10 | The elastic foil gas bearing that a kind of pretension is adjustable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103291750A CN103291750A (en) | 2013-09-11 |
| CN103291750B true CN103291750B (en) | 2015-08-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310173425.8A Expired - Fee Related CN103291750B (en) | 2013-05-10 | 2013-05-10 | The elastic foil gas bearing that a kind of pretension is adjustable |
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| Country | Link |
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| CN (1) | CN103291750B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388013B (en) * | 2015-12-04 | 2017-10-10 | 中国航空工业集团公司金城南京机电液压工程研究中心 | A kind of elastic characteristic test device for simulating thrust foil bearing operating mode |
| CN109707737A (en) * | 2018-12-28 | 2019-05-03 | 西安交通大学 | A kind of more watts of lap belts that bottom can incline preload elastic foil gas bearing |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101000071A (en) * | 2007-01-08 | 2007-07-18 | 哈尔滨工业大学 | Self-regulating type hydrodynamic gas elastic foil bearing |
| CN101539479A (en) * | 2009-04-21 | 2009-09-23 | 西安交通大学 | Testing closed centrifugal clutch of elastic foil bearing with preload effect |
| EP1740839B1 (en) * | 2004-02-14 | 2012-10-31 | Kturbo, Inc | Radial foil bearing |
| CN102797746A (en) * | 2012-08-29 | 2012-11-28 | 哈尔滨工业大学 | Lubricating-oil leafy foil bearing with changeable pitch supported by bump foil |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4445792A (en) * | 1982-11-22 | 1984-05-01 | General Motors Corporation | Variable preload foil bearing |
| US6698930B2 (en) * | 2000-12-01 | 2004-03-02 | Mitsubishi Heavy Industries, Ltd. | Foil gas bearing |
-
2013
- 2013-05-10 CN CN201310173425.8A patent/CN103291750B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1740839B1 (en) * | 2004-02-14 | 2012-10-31 | Kturbo, Inc | Radial foil bearing |
| CN101000071A (en) * | 2007-01-08 | 2007-07-18 | 哈尔滨工业大学 | Self-regulating type hydrodynamic gas elastic foil bearing |
| CN101539479A (en) * | 2009-04-21 | 2009-09-23 | 西安交通大学 | Testing closed centrifugal clutch of elastic foil bearing with preload effect |
| CN102797746A (en) * | 2012-08-29 | 2012-11-28 | 哈尔滨工业大学 | Lubricating-oil leafy foil bearing with changeable pitch supported by bump foil |
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| Publication number | Publication date |
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| CN103291750A (en) | 2013-09-11 |
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Granted publication date: 20150805 |