CN106402146B - The gas radial foil bearing of flat paillon axial width variation - Google Patents
The gas radial foil bearing of flat paillon axial width variation Download PDFInfo
- Publication number
- CN106402146B CN106402146B CN201610891450.3A CN201610891450A CN106402146B CN 106402146 B CN106402146 B CN 106402146B CN 201610891450 A CN201610891450 A CN 201610891450A CN 106402146 B CN106402146 B CN 106402146B
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- Prior art keywords
- paillon
- cylinder
- waveform
- wall
- bear box
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Classifications
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- 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
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- 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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
- F16C33/1005—Construction relative to lubrication with gas, e.g. air, as lubricant
- F16C33/101—Details of the bearing surface, e.g. means to generate pressure such as lobes or wedges
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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 gas radial foil bearing of flat paillon axial width variation, belongs to foil bearing field.Existing flat foil bearing has that bearing capacity is small.The gas radial foil bearing of flat paillon axial width variation, waveform paillon cylinder (2) posts on bear box (1) inner wall, and waveform paillon cylinder (2) sidewall opening is corresponding with groove (4) on bear box (1) inner wall；Planar sheets cylinder (3) posts on waveform paillon cylinder (2) inner wall, the convex edge (6) that planar sheets cylinder (3) sidewall opening turns up passes through waveform paillon cylinder (2) opening to be plugged in bear box (1) groove (4), and planar sheets cylinder (3) is welded and fixed at the pit (5) of bear box (1) with bear box (1).By the present invention in that flat foil thickness is axially varying, so that bearing intermediate region air-film thickness is increased both ends air-film thickness and reduce, the end that gas is lubricated to reduce bearing both ends is let out, and is improved lubrication gas pressure, is improved bearing capacity.
Description
Technical field
The present invention relates to a kind of gas radial foil bearings of flat paillon axial width variation.
Background technology
Since gas foil bearing is born, wave foil-type foil bearing is obtained with the advantages that its high capacity, simple installation
Extensive concern.In subsequent research, wave foil-type foil bearing develops to the third generation from the first generation, the bearing capacity of bearing obtain into
One step improves.It is worth noting that, above-mentioned improvement is by changing wave paillon shape, unified wave paillon rigidity being made to become along axis
To realizing with circumferential direction variation.While bearing power increase, significantly increasing for bearing machining installation difficulty is brought,
Cause ripe application of the current foil bearing on product still based on first generation foil bearing.In recent years, have benefited from surface to add
The development of work technology so that the micro Process of flat foil surfaces is achieved.Compared with wave paillon, flat foil configuration is simple, peace
Dress is convenient.By improving flat foil surfaces shape, optimization air-film thickness distribution can also reach the mesh for improving bearing capacity
's.At the same time, the installation difficulty of bearing is there is no increasing, to which the processing installation accuracy of bearing be effectively ensured.
But the structure feature that existing flat foil surfaces are plane, air film are evenly distributed in the axial direction so that bearing operation mistake
Occur the gas film pressure that middle section generates in journey and the gas film pressure gap that both ends generate is small, causes bearing capacity is small to ask
Topic.
Invention content
The purpose of the present invention is to solve the structure feature that existing flat foil surfaces are plane, air film divides in the axial direction
Cloth is uniform so that occurs the gas film pressure gap that the gas film pressure of middle section generation is generated with both ends during bearing operation
It is small, the small problem of bearing capacity, and propose a kind of gas radial foil bearing of flat paillon axial width variation.
A kind of gas radial foil bearing of flat paillon axial width variation, composition include：Its composition includes：Cartridge housing
Body, waveform paillon cylinder and planar sheets cylinder；Wherein,
On the inner wall of bear box setting axially through groove, and the width of groove adds in bear box both ends section part
Width forms the pit being connected to groove；The side wall of waveform paillon cylinder have axially through opening；The side wall of planar sheets cylinder has
Have axially through opening, and be open there is the convex edge turned up on one side；And
Waveform paillon cylinder posts on the inner wall of bear box, the opening of waveform paillon cylinder with it is recessed on bear box inner wall
Slot corresponds to, and is welded and fixed between waveform paillon cylinder and waveform paillon cylinder；
Planar sheets cylinder posts on the inner wall of waveform paillon cylinder, and convex edge passes through the opening of waveform paillon cylinder to be plugged on bearing
In the groove of shell, planar sheets cylinder is welded and fixed in the pit of bear box with bear box.
Beneficial effects of the present invention are：
The gas foil bearing of the present invention is made of bear box, waveform paillon cylinder and planar sheets cylinder, waveform paillon cylinder
It is installed on bear box inner wall with planar sheets cylinder, and the mode that welding is respectively adopted is fixed on bear box, there is structure
Simply, it is easily installed the advantages of processing, and has the advantages that improve installation accuracy.The side wall of the planar sheets cylinder of the present invention is in axis
To direction in intermediate thin, the feature of both ends thickness, the space that both ends are formed is less than the space that middle section is formed, in this way, bearing is transported
During row, both ends air-film thickness is small so that air-film thickness generates bust effect from centre to both ends, is conducive to lubrication gas and exists
Intermediate region is assembled, and the end for reducing bearing both ends lubrication gas is let out, and lubrication gas pressure is effectively improved, so that loading ability of bearing
Power improves 15~25%.
Description of the drawings
Fig. 1 is the overall structure diagram of the present invention；
Fig. 2 is the front view of the present invention；In figure, B indicates solder joint；
Fig. 3 is the A-A sectional views of Fig. 2,
Fig. 4 is the structural schematic diagram of waveform paillon cylinder of the present invention；
Fig. 5 is the structural schematic diagram of planar sheets cylinder of the present invention；
Fig. 6 is the structural schematic diagram of bear box of the present invention；
When Fig. 7 a, which are the flat foil surfaces that the present invention provides, does not have micro Process, gas foil bearing lubricates gas under working condition
The characteristic distributions of film in an axial direction；
When Fig. 7 b are that the flat foil surfaces that the present invention provides carry out micro Process, gas foil bearing lubricates gas under working condition
The characteristic distributions of film in an axial direction.
Specific implementation mode
Specific implementation mode one：
The gas radial foil bearing of the flat paillon axial width variation of present embodiment, composition include：Bear box
1, waveform paillon cylinder 2 and planar sheets cylinder 3；Wherein,
As shown in fig. 6, on the inner wall of bear box 1 setting axially through groove 4, and the width of groove 4 is in cartridge housing
1 both ends section part of body widens the pit 5 to be formed and be connected to groove 4；As shown in figure 5, the side wall of waveform paillon cylinder 2 has axial pass through
Logical opening；As shown in figure 4, the side wall of planar sheets cylinder 3 have axially through opening, and be open on one side have turn up it is convex
Along 6；And：
Waveform paillon cylinder 2 posts on the inner wall of bear box 1, in the opening and 1 inner wall of bear box of waveform paillon cylinder 2
Groove 4 correspond to, and be welded and fixed between waveform paillon cylinder 2 and waveform paillon cylinder 2, in solder joint pit 5 shown in Fig. 3；
Planar sheets cylinder 3 posts on the inner wall of waveform paillon cylinder 2, and convex edge 6 passes through the opening of waveform paillon cylinder 2 to be plugged on
In the groove 4 of bear box 1, planar sheets cylinder 3 is welded and fixed at the pit 5 of bear box 1 with bear box 1, and solder joint exists
In pit 5 shown in Fig. 3；
After being welded and fixed, ensure that planar sheets cylinder 3 can not axial and circumferential movement.Design sketch after installation is complete is referring to figure
Shown in 1.
Specific implementation mode two：
Unlike specific implementation mode one, the gas radial foil of the flat paillon axial width variation of present embodiment
Bearing,
The width of the pit 5 is 4~6 times of the width of groove 4, and length of the pit 5 in 1 axial direction of bear box is
1/6~1/5 times of the length of groove 4.
Specific implementation mode three：
Unlike specific implementation mode one or two, the gas of the flat paillon axial width variation of present embodiment is radial
Foil bearing, the elongated surfaces of the 6 place plane of convex edge pass through the axle center of planar sheets cylinder 3.
Specific implementation mode four：
Unlike specific implementation mode three, the gas radial foil of the flat paillon axial width variation of present embodiment
Bearing, the annular groove 7 that setting circumferencial direction penetrates through on the waist inner wall of the planar sheets cylinder 3.
Specific implementation mode five：
Unlike specific implementation mode four, the gas radial foil of the flat paillon axial width variation of present embodiment
Bearing, the width of the annular groove 7 account for the 1/3-3/4 of 3 tube length of planar sheets cylinder.
Specific implementation mode six：
Unlike specific implementation mode four or five, the gas of the flat paillon axial width variation of present embodiment is radial
Foil bearing, 7 depth of the annular groove are 5-20 μm.
Specific implementation mode seven：
Unlike specific implementation mode six, the gas radial foil of the flat paillon axial width variation of present embodiment
The trend of bearing, each vallate 8 on the inner wall and outer wall of the waveform paillon cylinder 2 is in the axial direction of waveform paillon cylinder 2.
Specific implementation mode eight：
Unlike specific implementation mode seven, the gas radial foil of the flat paillon axial width variation of present embodiment
Bearing, the distance between two adjacent vallates 8 are 3-5mm on the inner wall or outer wall of the waveform paillon cylinder 2.
Specific implementation mode nine：
Unlike specific implementation mode eight, the gas radial foil of the flat paillon axial width variation of present embodiment
Bearing, the distance between two adjacent vallates 8 are 4.2mm on the inner wall or outer wall of the waveform paillon cylinder 2.
Operation principle：
Waveform paillon cylinder 2 is placed in bearing inner surface first, keeps 2 one end of waveform paillon cylinder and the groove 4 of bear box 1 flat
Together, 2 one end of waveform paillon cylinder is welded on bearing inner surface.It is that advance progress bending processing is curled into planar sheets cylinder 3
Tubular, make the groove 4 of the 6 alignment bearings shell 1 of convex edge of 3 bending end of planar sheets cylinder, be attached to the interior of bear box 1.In axis
5 region of both ends pit for holding shell 1, the convex edge 6 of planar sheets cylinder 3 is welded in the groove 4 of bear box 1, to protect
Demonstrate,proving planar sheets cylinder 3 can not axial and circumferential movement.Design sketch after installation is complete is shown in Figure 1.
When Fig. 7 a and 7b are set forth flat foil surfaces and do not have micro Process and carry out micro Process, gas foil under working condition
The characteristic distributions of piece bearing lubrication air film in an axial direction.
There is no micro-machined foil bearing, lubrication air film to be axially distributed such as Fig. 7 a states in figure flat foil surfaces.
Since bearing both ends are contacted with environment, gas film pressure will present broad in the middle, narrowing toward each end characteristic distributions in an axial direction, cause in paillon
Between part deflection be slightly larger than both ends, air-film thickness at intermediate cross-section be slightly larger than both ends.
For the gas foil bearing of flat foil surfaces micro Process processing, air-film thickness such as Fig. 7 b states, foil deformation is still
Above-mentioned feature is so presented, but since flat paillon intermediate region is thinning so that there are one busts from centre to both ends for air-film thickness
Effect, this be beneficial to lubrication gas intermediate region assemble, the end for reducing bearing both ends is let out, so that gas film pressure
It significantly increases, improves bearing capacity.
The present invention can also have other various embodiments, without deviating from the spirit and substance of the present invention, this field
Technical staff makes various corresponding change and deformations in accordance with the present invention, but these corresponding change and deformations should all belong to
The protection domain of appended claims of the invention.
Claims (7)
1. a kind of gas radial foil bearing of flat paillon axial width variation, it is characterised in that：Its composition includes：Bear box
(1), waveform paillon cylinder (2) and planar sheets cylinder (3)；Wherein,
On the inner wall of bear box (1) setting axially through groove (4), and the width of groove (4) is at bear box (1) both ends
Section part widens the pit (5) to be formed and be connected to groove (4)；The side wall of waveform paillon cylinder (2) have axially through opening；It is flat
The side wall of face paillon cylinder (3) have axially through opening, and be open there is the convex edge (6) turned up on one side；And
Waveform paillon cylinder (2) posts on the inner wall of bear box (1), and the opening and bear box (1) of waveform paillon cylinder (2) are interior
Groove (4) on wall is corresponding, and is welded and fixed between waveform paillon cylinder (2) and waveform paillon cylinder (2)；
Planar sheets cylinder (3) posts on the inner wall of waveform paillon cylinder (2), and convex edge (6) pass through the opening of waveform paillon cylinder (2) to insert
Set in the groove (4) in bear box (1), planar sheets cylinder (3) at the pit (5) of bear box (1) with bear box (1)
It is welded and fixed；
The elongated surfaces of plane pass through the axle center of planar sheets cylinder (3) where the convex edge (6)；
The annular groove (7) that circumferencial direction penetrates through is set on the waist inner wall of planar sheets cylinder (3).
2. the gas radial foil bearing of flat paillon axial width variation according to claim 1, it is characterised in that：Described
The width of pit (5) is 4~6 times of the width of groove (4), and length of the pit (5) in bear box (1) axial direction is groove
(4) 1/6~1/5 times of length.
3. the gas radial foil bearing of flat paillon axial width variation according to claim 2, it is characterised in that：The ring
The width of slot (7) accounts for the 1/3-3/4 of planar sheets cylinder (3) tube length.
4. the gas radial foil bearing of flat paillon axial width variation according to claim 3, it is characterised in that：The ring
Slot (7) depth is 5-20 μm.
5. the gas radial foil bearing of flat paillon axial width variation according to claim 4, it is characterised in that：Described
The trend of the inner wall of waveform paillon cylinder (2) and each vallate (8) on outer wall is in the axial direction of waveform paillon cylinder (2).
6. the gas radial foil bearing of flat paillon axial width variation according to claim 5, it is characterised in that：Described
The distance between adjacent two vallates (8) are 3-5mm on the inner wall or outer wall of waveform paillon cylinder (2).
7. the gas radial foil bearing of flat paillon axial width variation according to claim 6, it is characterised in that：Described
The distance between adjacent two vallates (8) are 4.2mm on the inner wall or outer wall of waveform paillon cylinder (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610891450.3A CN106402146B (en) | 2016-10-12 | 2016-10-12 | The gas radial foil bearing of flat paillon axial width variation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610891450.3A CN106402146B (en) | 2016-10-12 | 2016-10-12 | The gas radial foil bearing of flat paillon axial width variation |
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| Publication Number | Publication Date |
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| CN106402146A CN106402146A (en) | 2017-02-15 |
| CN106402146B true CN106402146B (en) | 2018-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610891450.3A Active CN106402146B (en) | 2016-10-12 | 2016-10-12 | The gas radial foil bearing of flat paillon axial width variation |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107289136A (en) * | 2017-07-06 | 2017-10-24 | 南阳神鹰装备制造有限公司 | A kind of air levitation sealing structure for rotating machinery |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5902049A (en) * | 1997-03-28 | 1999-05-11 | Mohawk Innovative Technology, Inc. | High load capacity compliant foil hydrodynamic journal bearing |
| US7648280B2 (en) * | 2007-04-12 | 2010-01-19 | Hamilton Sundstrand Corporation | Weight reduction for journal air bearing |
| CN101821519A (en) * | 2007-06-12 | 2010-09-01 | 科特博公司 | Radial foil bearing with sealing function |
| CN103867571B (en) * | 2014-01-21 | 2017-07-25 | 中南林业科技大学 | Kinetic pressure gas journal bearing with axially variable rigidity and viscoelastic structure |
| KR101558490B1 (en) * | 2015-03-20 | 2015-10-07 | ㈜티앤이코리아 | Journal Foil Air Bearing |
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