CN207261472U - A kind of gas bearing - Google Patents
A kind of gas bearing Download PDFInfo
- Publication number
- CN207261472U CN207261472U CN201720921655.1U CN201720921655U CN207261472U CN 207261472 U CN207261472 U CN 207261472U CN 201720921655 U CN201720921655 U CN 201720921655U CN 207261472 U CN207261472 U CN 207261472U
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- CN
- China
- Prior art keywords
- paillon foil
- bearing
- bearing body
- foil
- notch
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Abstract
The utility model discloses a kind of gas bearing, including bearing body, the bearing body inner surface is provided with elastic supporting mechanism, and described elastic supporting mechanism one end is connected by the fixing groove being arranged on the bearing body port with the bearing body；Its other end is freely placed；The elastic supporting mechanism is made of the first paillon foil with negative poisson's ratio structure and the second paillon foil with chevron-notch, the utility model improves damping and the rigidity of bearing support structure, reduce the vibratory impulse occurred in operational process, improve the overall bearing capacity and operation stability of bearing.
Description
Technical field
It the utility model is related to technical field of bearings, and in particular to a kind of gas bearing.
Background technology
Paillon foil radial dynamic pressure gas bearing is a kind of self-adapting flexible supporting aero dynamic bearing.The flat paper tinsel of top layer in the bearing
All it is connected to bottom ripple paper tinsel by end face beam on bearing block structure, and contact condition is kept by the tension force of itself.With it is common
Rotor bearing is compared, it has without oil lubrication, and pollution-free, frictional resistance is small, high rotating speed, can operate in the temperature of extreme variation
The advantages that lower.Compared with conventional rigid gas bearing, its stability and adaptivity are greatly improved.At the same time with tradition
Gas bearing is compared, and the presence of its foil configuration enhances the bearing capacity of gas bearing, alleviates the rigidity abrasion of bearing,
And the installation error of gas bearing is eliminated, easy to the installation of bearing.Paillon foil radial dynamic pressure gas bearing in air compressor,
The machinery fields such as indoor air circulation system, the aircraft air circulatory system, gas turbine, turbocharger have wide application
Prospect.But existing paillon foil radial dynamic pressure gas bearing limits its bearing capacity and stability because of the limitation of its structure.
In Foil gas bearing, the paillon foil of elastic bearing is main load bearing component, and is a kind of sinking support
Structure, has certain rigidity and damping, gas bearing is had certain bearing capacity and absorbs rotor-bearing system vibration
Ability.But presence of the foil gas bearing due to intersecting rigidity and damping so that rotor-bearing system stability reduces.
Negative poisson's ratio structure is that the material structure of given shape is pressed into by cold punching technology.By LIGA techniques, i.e., by based on X
The high-accuracy processing technology of X-ray lithography X technology, the support foil piece that negative poisson's ratio structural material is manufactured, is being subject to turn
During sub- vibration effect, damping can be increased by the axial and circumferential energy that synchronously deformation consumption vibration produces.Meanwhile
Top foil increases herringbone slot structure, the rule flowing of air-flow, improves the stability of rotor-bearing system.
Utility model content
The purpose of the utility model is to overcome the deficiency of current above-mentioned technology, and a kind of gas bearing is provided, the reality
Damping and rigidity with new raising bearing support structure, reduce the vibratory impulse occurred in operational process, improve the total of bearing
Body bearing capacity and operation stability.
In order to solve that technical problem exists in the prior art, the utility model adopts the following technical solution：
A kind of gas bearing, including bearing body, the bearing body inner surface are provided with elastic supporting mechanism, the elasticity
Supporting mechanism one end is connected by the fixing groove being arranged on the bearing body port with the bearing body；Its other end is free
Place；The elastic supporting mechanism is made of the first paillon foil with negative poisson's ratio structure and the second paillon foil with chevron-notch.
Further, the bearing body inner surface is connected by the first paillon foil with second paillon foil；In first paillon foil
Outer surface is both provided with the negative poisson's ratio structure that grid is crossed to form by transverse and longitudinal swash, and the swash is using sine curve as bone line
It is process.
Further, the chevron-notch of second paillon foil is to form circle in the second paillon foil inner surface after forcing press is compressing
Rod structure, its one end leave rectangular strip region.
Further, the depth of the chevron-notch is 4.5 microns~5.5 microns, and helical angle is 40~50, slot number for 10~
15。
Further, first paillon foil and second paillon foil are nickel base superalloy (InconelX-750) or compound
Nylon material
(PA6T) expect.
Beneficial effect
1st, the utility model proposes radial gas bearing structure, by introduce by negative poisson's ratio structure support paillon foil, carry
The high radial gas bearing provided bearing capacity of paillon foil, meanwhile, improve bearing by the use of negative poisson's ratio structure as elastic bearing
Damping.
2nd, the first paillon foil using itself Poisson's ratio structure with corrugated form, adds bearing in the utility model
Damping action.
3rd, the second paillon foil and the first paillon foil of negative poisson's ratio structure are subject to from rotor the utility model during the motion
Load and be deformed, the two provides certain rigidity for bearing jointly.Since the first paillon foil has certain supporting space, so
With larger rigidity, and the second paillon foil has certain herringbone slot structure, and relative rigidity is smaller, is born during rotor operation
Poisson's ratio structure is by the deformation adjustment rigidity of self structure, while the chevron-notch rule flow regime of gas so that bearing
Gas film pressure is homogenized, so as to change the overall stiffness of elastic support structure.
4th, the utility model has a high capacity by the first paillon foil radial dynamic pressure gas bearing, high rigidity, high-damping
Characteristic, while the second paillon foil of herringbone slot structure is added again, so as to improve the stability of foil bearing, market prospects are optimistic.
Brief description of the drawings
Fig. 1 is the utility model overall structure diagram；
Fig. 2 is the utility model bearing block structure schematic diagram；
Fig. 3 is the first foil configuration schematic diagram in the utility model；
Fig. 4 is the second foil configuration schematic diagram in the utility model；
Fig. 5 assembles partial schematic diagram for the utility model bearing；
Fig. 6 is the first paillon foil of the utility model and the second paillon foil assembling schematic diagram；
Fig. 7 is the utility model the first paillon foil partial structural diagram；
Embodiment
The utility model is explained in detail below in conjunction with the accompanying drawings.
Such as Fig. 1, shown in Fig. 2, the utility model provides a kind of gas bearing, including：Table in bearing body 1, the bearing body 1
Face is provided with elastic supporting mechanism 2, and described 2 one end of elastic supporting mechanism passes through the fixing groove that is arranged on the bearing body port
11 are connected with the bearing body 1；Its other end 2 is freely placed；The elastic supporting mechanism 2 is by with negative poisson's ratio structure
First paillon foil 21 and the second paillon foil 22 with chevron-notch are formed.Negative poisson's ratio structure support paillon foil 21, i.e. the first paillon foil, top layer people
Word groove paillon foil 22, i.e. the second paillon foil；The elastic bearing paillon foil 21 is process using negative poisson's ratio structure, the top foil
22 are provided with chevron-notch above, and the negative poisson's ratio structure support paillon foil 21 is arranged on the inner surface of bearing body 1, the top layer people
Word groove paillon foil 22 is covered on the paillon foil 21 of negative poisson's ratio structure support, the foil configuration of the negative poisson's ratio structure support and top
Layer chevron-notch paillon foil together form the elastic supporting mechanism 2 of bearing.First paillon foil 21 and second paillon foil 22 are
Nickel base superalloy (InconelX-750) or composite nylon material (PA6T) material.
As shown in figure 3, negative poisson's ratio structure support paillon foil 21 is fabricated using high-accuracy processing technology LIGA, it is used
Integral structure, inside and outside two contact surfaces employ wavy texture so that the abrasion of contact and the rigging error of bearing are able to
Eliminate.As shown in figure 4, scribe herringbone slot structure in 22 structure of top foil, the rule flow regime of gas, improves steady
It is qualitative.As shown in figure 5, the rigidity of elastic support structure 2 is decided by the thickness of paillon foil and the contact area of contact surface, wavy texture
Rigidity and the damping of structure can be changed by varying contact area when being squeezed.
As shown in figure 3, negative poisson's ratio paillon foil 21 is fabricated by high-accuracy processing technology LIGA, its cross section such as Fig. 7
Shown, basic structure is fabricated to certain thickness negative paper tinsel pine as bone line using sine curve and compares structure.By varying negative poisson's ratio knot
The wall thickness of structure and sinusoidal action size, can obtain different rigidity and damping characteristic.As shown in figure 4, it is located at top
22 structure of top foil accurately cut by laser cutting technique by metal foil, scribed in top surface by LIGA techniques
Herringbone slot structure, and it is compressing through forcing press, cylindrical structure of the chevron-notch in inner surface is formed, compressing rear its one end is stayed
There is rectangular strip region.What compressing top layer chevron-notch paillon foil 22 became in shaped heat treatment elimination after local stress again
Cylindricality, is ready for assembling.The form parameter of top layer chevron-notch paillon foil 22 is mainly by foil thickness, chevron-notch helical angle, groove depth,
The parameter such as slot number, groove width ratio determines, different-stiffness and the compliant foil 22 of damping are can obtain by adjusting these parameters.It will make
The negative poisson's ratio structure support paillon foil 21 of completion and the top layer chevron-notch paillon foil 22 of shaping are assemblied on bearing body 1.The people
The depth of word groove is 4.5 microns~5.5 microns, and helical angle is 40~50, and slot number is 10~15.The present invention herringbone slot structure be
Depth consistent with air-film thickness is 5 microns, and helical angle is 45 degree, slot number 12.Negative poisson's ratio structure support paillon foil and top layer people
Word groove paillon foil compliant foil is put into bearing body 1, and both ends are concordant with bearing body end face, the rectangular strip that both circumferential ends are reserved
The fixing groove 11 that paillon foil is opened by bearing body assembles up, and spot welding is integrally formed structure, and the other end is freely placed.Negative Poisson
Elastic bearing mechanism 2 is constituted than structure support paillon foil 21 and top layer chevron-notch paillon foil 22, which provides for bearing 1
Main rigidity and damping.Due to the presence of chevron-notch so that bearing gas film pressure is able to regularization.Top layer chevron-notch paillon foil
22 be covered in it is as shown in Figure 6 to form continuous bearing area on 21 supporting structure of negative poisson's ratio structure support paillon foil.
Except example set forth above, negative poisson's ratio structure support paillon foil can have other different forms, bearing negative pool
Pine can have different installations and fixed form, negative poisson's ratio structure support than structure support paillon foil 2 and top layer chevron-notch paillon foil 3
The shape of paillon foil 2 and top layer chevron-notch paillon foil 3 can be designed according to different concrete conditions.Example provided above is only this reality
With new preferred embodiment, as long as being made according to the utility model claims and the utility model description simple etc.
Effect change and modification, should all belong to the scope of the utility model patent covering.
Claims (5)
1. a kind of gas bearing, including bearing body, it is characterised in that：The bearing body inner surface is provided with resilient support machine
Structure, described elastic supporting mechanism one end are connected by the fixing groove being arranged on the bearing body port with the bearing body；
Its other end is freely placed；The elastic supporting mechanism is by the first paillon foil with negative poisson's ratio structure and second with chevron-notch
Paillon foil is formed.
2. a kind of gas bearing according to claim 1, it is characterised in that the bearing body inner surface passes through the first paillon foil
It is connected with second paillon foil；The first paillon foil surfaces externally and internally is both provided with the negative Poisson that grid is crossed to form by transverse and longitudinal swash
Than structure, the swash is process by bone line of sine curve.
3. a kind of gas bearing according to claim 1, it is characterised in that the chevron-notch of second paillon foil is through pressure
Cylindrical structure is formed in the second paillon foil inner surface after machine is compressing, its one end leaves rectangular strip region.
A kind of 4. gas bearing according to claim 1, it is characterised in that the depth of the chevron-notch for 4.5 microns~
5.5 microns, helical angle is 40~50, and slot number is 10~15.
5. a kind of gas bearing according to claim 1, it is characterised in that first paillon foil and second paillon foil are equal
For nickel base superalloy or composite nylon material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720921655.1U CN207261472U (en) | 2017-07-27 | 2017-07-27 | A kind of gas bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720921655.1U CN207261472U (en) | 2017-07-27 | 2017-07-27 | A kind of gas bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207261472U true CN207261472U (en) | 2018-04-20 |
Family
ID=61927175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720921655.1U Expired - Fee Related CN207261472U (en) | 2017-07-27 | 2017-07-27 | A kind of gas bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207261472U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109519477A (en) * | 2019-01-11 | 2019-03-26 | 哈尔滨工程大学 | A kind of dual-cavity bearing shell |
| CN110242671A (en) * | 2019-05-17 | 2019-09-17 | 北京科技大学 | A kind of cone foil dynamical pressure air bearing |
-
2017
- 2017-07-27 CN CN201720921655.1U patent/CN207261472U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109519477A (en) * | 2019-01-11 | 2019-03-26 | 哈尔滨工程大学 | A kind of dual-cavity bearing shell |
| 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 |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180420 Termination date: 20190727 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |