CN107314033A - A kind of gas bearing and its manufacture method - Google Patents
A kind of gas bearing and its manufacture method Download PDFInfo
- Publication number
- CN107314033A CN107314033A CN201710623414.3A CN201710623414A CN107314033A CN 107314033 A CN107314033 A CN 107314033A CN 201710623414 A CN201710623414 A CN 201710623414A CN 107314033 A CN107314033 A CN 107314033A
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- China
- Prior art keywords
- paillon foil
- bearing
- bearing body
- notch
- chevron
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- F16C32/00—Bearings not otherwise provided for
- F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
Abstract
The invention discloses a kind of gas bearing and its manufacture method, including bearing body, the flexible supporting mechanism of bearing body inner surface setting, 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 up of the first paillon foil with negative poisson's ratio structure and the second paillon foil with chevron-notch, the invention improves damping and the rigidity of bearing support structure, reduce the vibratory impulse occurred in running, improve the overall bearing capacity and operation stability of bearing.
Description
Technical field
The present invention relates to technical field of bearings, and in particular to a kind of gas bearing and its manufacture method.
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, and 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 of lower.Compared with conventional rigid gas bearing, its stability and adaptivity are greatly improved.Simultaneously 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 alignment error of gas bearing is eliminated, is easy to the installation of bearing.Paillon foil radial dynamic pressure gas bearing in air compressor,
Indoor air circulation system, the aircraft air circulatory system, gas turbine, the mechanical field such as turbocharger has 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, with certain rigidity and damping, makes gas bearing have 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 is reduced.
Negative poisson's ratio structure is the material structure that given shape is pressed into by cold punching technology.By LIGA techniques, i.e., by based on X
The high-accuracy process technology of X-ray lithography X technology, the support foil piece that negative poisson's ratio structural material is manufactured, by turn
During sub- vibration effect, damping can be increased by the axial and circumferential energy that synchronously deformation consumption vibration is produced.Meanwhile,
Top foil increases herringbone slot structure, and the rule flowing of air-flow improves the stability of rotor-bearing system.
The content of the invention
It is an object of the invention to overcome the shortcomings of current above-mentioned technology, and there is provided a kind of gas bearing and its manufacturer
Method, the invention improves damping and the rigidity of bearing support structure, reduces the vibratory impulse occurred in running, improves bearing
Overall bearing capacity and operation stability.
In order to solve to exist in the prior art technical problem, the present invention is adopted the following technical scheme that：
A kind of gas bearing, including bearing body, the flexible supporting mechanism of bearing body inner surface setting, 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 up 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 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
Process.
Further, the chevron-notch of second paillon foil be through forcing press it is compressing after in the second paillon foil inner surface form circle
Rod structure, its one end leaves rectangular strip region.
Further, the depth of the chevron-notch is 4.5 microns~5.5 microns, and helical angle is 40~50, and slot number is 10~15
Bar.
A kind of gas bearing fabrication method, comprises the following steps：
Step 1, the first paillon foil of negative poisson's ratio structure is made up of LIGA techniques, the negative paper tinsel pine is than structure with sinusoidal bent
Line is that bone line formation transverse and longitudinal swash intersects grid；And by changing the wall thickness and sinusoidal action of the negative poisson's ratio structure
First paillon foil of the different rigidity of size acquisition and damping characteristic；
Step 2, herringbone slot structure is scribed on the second paillon foil by LIGA techniques, and through forcing press to chevron-notch inner surface
It has been pressed into cylindrical shape；The other end of the second compressing paillon foil leaves rectangular strip region；Disappear finally by heat treatment
Except local stress in chevron-notch in the second paillon foil；
Step 3, the first paillon foil described in step 1 is put into bearing body inner surface, while again by the second paper tinsel described in step 2
Piece is placed on the first paillon foil inner surface, and the two ends of first paillon foil and second paillon foil are concordant with bearing body end face respectively,
The fixing groove that the reserved rectangular strip paillon foil of both circumferential one ends is opened by bearing body is assembled up, and spot welding turns into whole
Body structure, the other end is freely placed.
Further, first paillon foil and second paillon foil are nickel base superalloy or composite nylon material.
Beneficial effect
1st, radial gas bearing structure proposed by the present invention, by introducing by negative poisson's ratio structure support paillon foil, is improved
The radial gas bearing provided bearing capacity of paillon foil, meanwhile, improve the damping of bearing by the use of negative poisson's ratio structure as elastic bearing.
2nd, the first paillon foil carries the negative poisson's ratio structure of corrugated form using itself in the present invention, adds the resistance of bearing
Buddhist nun acts on.
3rd, the second paillon foil and the paillon foil of negative poisson's ratio structure first of the invention in motion process are by the load from rotor
And be deformed, the two provides certain rigidity for bearing jointly.Because the first paillon foil has certain supporting space, so having
Larger rigidity, and the second paillon foil has certain herringbone slot structure, relative rigidity is smaller, and Poisson is born during rotor operation
Than deformation adjustment rigidity of the structure by self structure, while the chevron-notch rule flow regime of gas so that bearing air film
Pressure is homogenized, so as to change the integral rigidity of elastic support structure.
4th, the present invention has a high capacity by the first paillon foil radial dynamic pressure gas bearing, high rigidity, the characteristic of high-damping,
The paillon foil of herringbone slot structure second is added again simultaneously, so as to improve the stability of foil bearing, market prospects are optimistic.
Brief description of the drawings
Fig. 1 is overall structure diagram of the present invention；
Fig. 2 is bearing block structure schematic diagram of the present invention；
Fig. 3 is the first foil configuration schematic diagram in the present invention；
Fig. 4 is the second foil configuration schematic diagram in the present invention；
Fig. 5 is that bearing of the present invention assembles partial schematic diagram；
Fig. 6 is the first paillon foil of the invention and the second paillon foil assembling schematic diagram；
Fig. 7 is the first paillon foil partial structural diagram of the invention；
Embodiment
The present invention is explained in detail below in conjunction with the accompanying drawings.
Such as Fig. 1, shown in Fig. 2, the present invention provides a kind of gas bearing, including：Bearing body 1, the inner surface of the bearing body 1 are set
Be equipped with elastic supporting mechanism 2, described one end of elastic supporting mechanism 2 by the fixing groove 11 that is arranged on the bearing body port with
The bearing body 1 is connected；Its other end 2 is freely placed；The elastic supporting mechanism 2 is by first with negative poisson's ratio structure
Paillon foil 21 and the second paillon foil composition 22 with chevron-notch.Negative poisson's ratio structure support paillon foil 21, i.e. the first paillon foil, top layer chevron-notch
Paillon foil 22, i.e. the second paillon foil；The elastic bearing paillon foil 21 is processed using negative poisson's ratio structure, on the top foil 22
Face is provided with chevron-notch, and the negative poisson's ratio structure support paillon foil 21 is arranged on the inner surface of bearing body 1, the top layer chevron-notch
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 people
Word groove paillon foil together form the elastic supporting mechanism 2 of bearing.First paillon foil 21 and second paillon foil 22 are Ni-based
High temperature alloy (InconelX-750) or composite nylon material (PA6T).
As shown in figure 3, negative poisson's ratio structure support paillon foil 21 is fabricated by 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 the structure of top foil 22, the rule flow regime of gas is improved 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 changing contact area when being squeezed.
As shown in figure 3, negative poisson's ratio paillon foil 21 is fabricated by 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 by bone line of sine curve and compares structure.By changing 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, positioned at top
The structure of top foil 22 accurately cut by laser cutting technique by tinsel, 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.Shaped heat treatment eliminates what is turned into after interior local stress to compressing top layer chevron-notch paillon foil 22 again
Cylindricality, is ready for assembling.The form parameter of top layer chevron-notch paillon foil 22 is main by foil thickness, chevron-notch helical angle, groove depth,
Slot number, the parameter such as groove width ratio is determined, the compliant foil 22 of different-stiffness and damping is 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 depth of chevron-notch in the present invention
Spend for 5 microns, it is consistent with air-film thickness；Helical angle is 45, its slot number be 12,
Negative poisson's ratio structure support paillon foil and top layer chevron-notch paillon foil compliant foil are put into bearing body 1, two ends and bearing body
End face is concordant, and the fixing groove 11 that the reserved rectangular strip paillon foil of both circumferential ends is opened by bearing body is assembled up, and
Spot welding is integrally formed structure, and the other end is freely placed.Negative poisson's ratio structure support paillon foil 21 and top layer chevron-notch paillon foil 22 are constituted
Elastic bearing mechanism 2, the supporting structure 2 is that bearing 1 provides main rigidity and damping.Due to the presence of chevron-notch, make
Obtain bearing gas film pressure and be able to regularization.Top layer chevron-notch paillon foil 22 is covered in the supporting structure of negative poisson's ratio structure support paillon foil 21
On it is as shown in Figure 6 to form continuous bearing area.
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 installation 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 hair
Bright preferred embodiment, as long as the simple equivalence changes made according to the claims in the present invention and present specification are with repairing
Decorations, should all belong to the scope of patent covering of the present invention.
Claims (6)
1. a kind of gas bearing, including bearing body, it is characterised in that：The flexible support machine of bearing body inner surface setting
Structure, 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 by the first paillon foil with negative poisson's ratio structure and second with chevron-notch
Paillon foil is constituted.
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 provided with the negative Poisson that grid is crossed to form by transverse and longitudinal swash
Than structure, the swash is processed 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
In the second paillon foil inner surface formation cylindrical structure after machine is compressing, its one end leaves rectangular strip region.
4. a kind of gas bearing according to claim 1, it is characterised in that the depth of the chevron-notch is 4.5 microns~
5.5 microns, helical angle is 40~50, and slot number is 10~15.
5. a kind of gas bearing fabrication method, it is characterised in that comprise the following steps：
Step 1, be made up the first paillon foil of negative poisson's ratio structure of LIGA techniques, the negative paper tinsel pine than structure using sine curve as
Bone line formation transverse and longitudinal swash intersects grid；And by changing the wall thickness and sinusoidal action size of the negative poisson's ratio structure
First paillon foil of the different rigidity of acquisition and damping characteristic；
Step 2, herringbone slot structure is scribed on the second paillon foil by LIGA techniques and chevron-notch inner surface suppressed through forcing press
Into there is cylindrical shape；The other end of the second compressing paillon foil leaves rectangular strip region；The is eliminated finally by heat treatment
Local stress in chevron-notch in two paillon foils；
Step 3, the first paillon foil described in step 1 is put into bearing body inner surface, while again putting the second paillon foil described in step 2
Put in the first paillon foil inner surface, the two ends of first paillon foil and second paillon foil are concordant with bearing body end face respectively, both
The fixing groove opened by bearing body of the reserved rectangular strip paillon foil of circumferential one end assemble up, and spot welding is integrally formed knot
Structure, the other end is freely placed.
6. a kind of gas bearing fabrication method according to claim 4, it is characterised in that first paillon foil and described
Two paillon foils are nickel base superalloy or composite nylon material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710623414.3A CN107314033A (en) | 2017-07-27 | 2017-07-27 | A kind of gas bearing and its manufacture method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710623414.3A CN107314033A (en) | 2017-07-27 | 2017-07-27 | A kind of gas bearing and its manufacture method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107314033A true CN107314033A (en) | 2017-11-03 |
Family
ID=60169986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710623414.3A Pending CN107314033A (en) | 2017-07-27 | 2017-07-27 | A kind of gas bearing and its manufacture method |
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| CN (1) | CN107314033A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116658516A (en) * | 2023-06-01 | 2023-08-29 | 南华大学 | Leaf vein type double-rotation foil pneumatic dynamic pressure bearing |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030169951A1 (en) * | 2002-03-08 | 2003-09-11 | Ntt Corporation | Foil bearing and spindle device using the same |
| CN103438091A (en) * | 2013-08-02 | 2013-12-11 | 湖南大学 | Aero dynamic bearing with metal rubber and elastic chaff composite support structure |
| CN104632871A (en) * | 2015-03-17 | 2015-05-20 | 湖南大学 | Minitype foil aerodynamic pressure bearing |
| CN105526249A (en) * | 2016-01-18 | 2016-04-27 | 湖南大学 | Combined mini-type foil gas dynamic pressure bearing |
| CN106763190A (en) * | 2017-02-16 | 2017-05-31 | 西安建筑科技大学 | A kind of intelligent dynamic and hydrostatic bearing based on negative poisson's ratio structure |
-
2017
- 2017-07-27 CN CN201710623414.3A patent/CN107314033A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030169951A1 (en) * | 2002-03-08 | 2003-09-11 | Ntt Corporation | Foil bearing and spindle device using the same |
| CN103438091A (en) * | 2013-08-02 | 2013-12-11 | 湖南大学 | Aero dynamic bearing with metal rubber and elastic chaff composite support structure |
| CN104632871A (en) * | 2015-03-17 | 2015-05-20 | 湖南大学 | Minitype foil aerodynamic pressure bearing |
| CN105526249A (en) * | 2016-01-18 | 2016-04-27 | 湖南大学 | Combined mini-type foil gas dynamic pressure bearing |
| CN106763190A (en) * | 2017-02-16 | 2017-05-31 | 西安建筑科技大学 | A kind of intelligent dynamic and hydrostatic bearing based on negative poisson's ratio structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116658516A (en) * | 2023-06-01 | 2023-08-29 | 南华大学 | Leaf vein type double-rotation foil pneumatic dynamic pressure bearing |
| CN116658516B (en) * | 2023-06-01 | 2024-02-23 | 南华大学 | Leaf vein type double-rotation foil pneumatic dynamic pressure bearing |
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| CB02 | Change of applicant information |
Address after: 300350 District, Jinnan District, Tianjin Haihe Education Park, 135 beautiful road, Beiyang campus of Tianjin University Applicant after: Tianjin University Address before: 300072 Tianjin City, Nankai District Wei Jin Road No. 92 Applicant before: Tianjin University |
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| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20230929 |
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| AD01 | Patent right deemed abandoned |