CN102808848B - Air bearing structure - Google Patents
Air bearing structure Download PDFInfo
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- CN102808848B CN102808848B CN201210301495.2A CN201210301495A CN102808848B CN 102808848 B CN102808848 B CN 102808848B CN 201210301495 A CN201210301495 A CN 201210301495A CN 102808848 B CN102808848 B CN 102808848B
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Abstract
The invention discloses an air bearing structure, which is different from a structural form of the conventional bump foil type air bearing, and is capable of replacing a bump foil support structure in the conventional structure by utilizing a metal rubber layer. The metal rubber layer is woven by common metal wires or memory alloy wires or is processed by a method of mixing and weaving the common metal wires and the memory alloy wires; the sectional form of the metal rubber can be a rectangular section or a trapezoidal section. The air bearing structure, provided by the invention, keeps the advantages of long service, low cost, simple structure and free maintenance of the conventional air bearing, and is combined with characteristics of low cost, strong adaptability, large bearing capacity, outstanding vibration damping effect and the like of the metal rubber, so that requirements of high-speed rotary machines, such as aeration engines and the like, on a rotor support are satisfied, thus the application field and the application range of the air bearing are further improved.
Description
Technical field
The invention belongs to design bearing or the support of rotary power machinery and antivibration area, relate to a kind of pneumatic bearing.Specifically, be to be used in aeroengine, gas turbine, or other rotary machine, the pneumatic bearing during rotor-support-foundation system supports.
Background technique
Bearing and support system, be key technology in rotary machine design, is related to stability, reliability and the life-span of complete machine operation.In numerous bearing types, pneumatic bearing is with the long lifetime, and low cost is simple in structure, and the non-maintaining technical characterstic that waits, becomes rotating machinery, especially the first-selection of high-speed rotating machine support system.But its key designing technique still rests in the advanced technology countries such as the U.S., Russia, Japan.China does not have designed capacity and the successful precedent of pneumatic bearing system at present.But the domestic market demand is extremely huge, containing huge economic benefit.
As shown in Fig. 8-10, pneumatic bearing structurally comprises flat paper tinsel layer (1), ripple paper tinsel layer (2) and external supporting structure layer (3) from inside to outside successively, be usually used in supporting rotor structure (4), gone through three generation products in the development of advanced country, its design, the marketization have been tending towards ripe.In addition, modern pneumatic bearing also has certain technical bottleneck: bearing capacity has much room for improvement, to meet the support demand of large rotor; Ripple paper tinsel layer shear stiffness skewness, Coulomb damping effect cannot be brought into play to greatest extent; Under gas film pressure effect, axially effective rigidity skewness, Coulomb damping is used limited, and bearing capacity is restricted.These circumscribed existence, are the sheet type structures due to ripple paper tinsel layer, and the feature of aerodynamic loading non-uniform Distribution on supporting surface achievements.Therefore, if can propose a kind of supporting structure, solve above-mentioned bottleneck point, just can make application and the Applicable scope of pneumatic bearing, further promoted.Especially for China, not only grasp independent intellectual property right, more broken through the blockade on new techniques of association area, there is great construction value and economic implications.
Summary of the invention
Object of the present invention, to propose a kind of novel air bearing structure, air bearing structure to prior art improves, use metal-rubber layer to replace the ripple paper tinsel supporting structure in conventional air bearing structure, keeping the conventional air bearing length life-span, low cost, simple in structure, on the basis of non-maintaining advantage, low in conjunction with metal-rubber cost, strong adaptability, bearing capacity is large, the features such as effectiveness in vibration suppression is outstanding, thereby meet the requirement to rotor supports such as such as aeroengine high-speed rotating machine, application and the Applicable scope of pneumatic bearing are further promoted.
For achieving the above object, the invention provides a kind of novel air bearing structure, be arranged in the rotor support system of high-speed rotating machine, it is characterized in that, described air bearing structure ecto-entad comprises external supporting structure layer, metal-rubber layer peace paper tinsel layer successively, described metal-rubber layer adopts metal-rubber to make, and described metal-rubber forms by wire wrapping wire, braiding, compacting.
Preferably, all or part of wire of wire in described metal-rubber is memory alloy metal wire.
Preferably, the winding of the wire in described metal-rubber cross section is rectangular cross-section or trapezoid cross section or other analogous shape.
Preferably, in described metal-rubber, mix and take wrapping wire by the wire of combination, at least two kinds of different-diameters of collocation, in the wire of described at least two kinds of different-diameters, the wire of diameter maximum is main silk, between adjacent main silk, be tangent, in the gap between described main silk, be filled with the wire that diameter is less.
Preferably, in described metal-rubber, it is rectangle that the mixed wire of taking wrapping wire is wound around cross section, and between the main silk of adjacent two layers, two tangent main silk lines of centres are vertical line arbitrarily.
Preferably, in described metal-rubber, it is trapezoidal that the mixed wire of taking wrapping wire is wound around cross section, and between the main silk of adjacent two layers, two tangent main silk lines of centres are non-perpendicular line arbitrarily.
Preferably, in described metal-rubber, the metal wire mixed of described at least two kinds of different-diameters is taken wrapping wire, can be that the metal wire mixed of three kinds of diameters is taken.
Preferably, in described metal-rubber, it can be the mixed cross sections of taking of rectangular arranged three diameter metal silks that the mixed wire of taking wrapping wire is wound around cross section.
Preferably, in described metal-rubber, it can be the mixed cross sections of taking of trapezoidal arrangement two diameter metal silks that the mixed wire of taking wrapping wire is wound around cross section.
Preferably, in described metal-rubber, it can be the mixed cross sections of taking of trapezoidal arrangement three diameter metal silks that the mixed wire of taking wrapping wire is wound around cross section.
The deficiency of conventional air bearing is: bearing capacity is not high enough, is difficult to meet the support demand of large rotor; Ripple paper tinsel layer shear stiffness skewness wherein, Coulomb damping effect cannot be brought into play to greatest extent; Under gas film pressure effect, axially effective rigidity skewness, Coulomb damping is used limited, and bearing capacity is restricted.These circumscribed existence, are the sheet type structures due to ripple paper tinsel layer, and the feature of aerodynamic loading non-uniform Distribution on supporting surface achievements.
In novel air bearing structure of the present invention, use metal-rubber layer to substitute the ripple paper tinsel layer in conventional air bearing, both conventional air bearing length life-span, low cost, simple in structure, non-maintaining advantage had been kept, combine again the features such as metal-rubber cost is low, strong adaptability, bearing capacity is large, effectiveness in vibration suppression is outstanding, thereby make air bearing structure of the present invention can meet high-speed rotating machines such as aeroengine the requirement to rotor supports, further promoted application and the Applicable scope of pneumatic bearing.
Air bearing structure of the present invention, compares with the pneumatic bearing of prior art, and its advantage is:
1, conventional air bearing length life-span, low cost, simple in structure, non-maintaining advantage have been kept, combine again the features such as metal-rubber cost is low, strong adaptability, bearing capacity is large, effectiveness in vibration suppression is outstanding, thereby make air bearing structure of the present invention can meet high-speed rotating machines such as aeroengine the requirement to rotor supports, further promoted application and the Applicable scope of pneumatic bearing.
2, the pneumatic bearing of making for the metal-rubber of all or part of use memory alloy metal wire, also utilize the variation of memory alloy metal wire along with Environmental Conditions and operating temperature, the characteristic that memory alloy can deform, thereby change the stiffness characteristics of self and metal-rubber entirety, realize pneumatic bearing for supporting object with servo characteristic.Be conducive to reduce to support the excursion of object dynamic performance, strengthen stability, and then can increase the service life.
Brief description of the drawings
Fig. 1 pneumatic bearing unfolded drawing with metal-rubber layer of the present invention;
Fig. 2 metal-rubber structural upright schematic diagram;
Fig. 3 metal-rubber sectional view;
The mixed cross section of taking of Fig. 4 rectangular arranged two diameter metal silks;
The mixed cross section of taking of Fig. 5 rectangular arranged three diameter metal silks;
The mixed cross section of taking of the trapezoidal arrangement two diameter metal silks of Fig. 6;
The mixed cross section of taking of the trapezoidal arrangement three diameter metal silks of Fig. 7;
Fig. 8 conventional wave paper tinsel formula pneumatic bearing unfolded drawing;
Fig. 9 conventional wave paper tinsel formula pneumatic bearing engineering structure figure;
Figure 10 successive dynasties conventional foil chip air bearing structure figure.
Embodiment
For making object of the present invention, technological scheme and advantage clearer, referring to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
Fig. 1 shows the plane outspread drawing of air bearing structure of the present invention, be arranged in the rotor support system of high-speed rotating machine, described air bearing structure ecto-entad comprises external supporting structure layer 1, the peaceful paper tinsel layer 3 of metal-rubber layer 2 successively, described metal-rubber layer 2 adopts metal-rubber to make, as shown in Figure 2, described metal-rubber forms by wire wrapping wire, braiding, compacting the structure of common metal-rubber.The all or part of wire of wire in described metal-rubber is memory alloy metal wire.
Fig. 3-7 show the metal-rubber form that the air bearing structure in some embodiments may use.As shown in Figure 3, in metal-rubber, all diameters wiry are identical, and metal-rubber uses the wire of single diameter to be wound around compacting and forms.
As shown in Figure 4, in metal-rubber, the wire 1,2 that comprises two kinds of different-diameters.Section form is rectangle, and wire 1 is main silk, and wire 2 is filled in the space of wire 1.Now, wire 1 contacts with 8 one metal wires simultaneously, that is has 8 rubbing surfaces, and damping characteristic is enhanced; Meanwhile, the structural dynamic characteristic of metal-rubber entirety is improved, and has also improved the reliability under severe service condition.In wire 1,2, can have a kind of wire to use memory alloy metal wire, wire that also can two kinds of diameters all adopts memory alloy metal wire.By using memory alloy metal wire, utilize the variation of memory alloy metal wire along with Environmental Conditions and operating temperature, the characteristic that memory alloy can deform, thus change the stiffness characteristics of self and metal-rubber entirety, realize supporting structure for supporting object with servo characteristic.Be conducive to reduce to support the excursion of object dynamic performance, strengthen stability, and then can increase the service life.Meanwhile, the loss that metal-rubber itself is subject to also can reduce, and improves the serviceability of itself.
As shown in Figure 5, in metal-rubber, the wire 1,2 and 3 that comprises three kinds of different-diameters.Section form is rectangle, and wire 1 is main silk, and wire 2 is filled in the space of wire 1, and wire 3 is filled in the space between space and wire 1 and the wire 2 between wire 2.Now, wire 1 has more rubbing surface number, and damping characteristic and reliability are better compared with embodiment one.In wire 1,2,3, can have one or both wires to use memory alloy metal wire, wire that also can three kinds of diameters all adopts memory alloy metal wire.
As shown in Figure 6, in metal-rubber, the wire 1 and 2 that comprises two kinds of different-diameters.Section form is trapezoidal, and wire 1 is main silk, and wire 2 is filled in the space of wire 1.Appoint and get wire 1-1 and 1-4 tangent in adjacent two layers, its line of centres 1-5 is non-perpendicular line.Now, only consider the surface of contact between main silk, single main silk has 6 surface of contact; Add the impact of wire 2, single main silk has 12 surface of contact.In embodiment one, surface of contact is more, thereby its reliability, damping characteristic are better.In addition, in trapezoid cross section, the collocation mode between main silk, makes its structure stability also be better than rectangular cross-section.In wire 1,2, can have a kind of wire to use memory alloy metal wire, wire that also can two kinds of diameters all adopts memory alloy metal wire.Contrast, when the wire diameter of similar number, trapezoid cross section is more excellent than rectangular cross-section performance.
As shown in Figure 7, in metal-rubber, the wire 1,2 and 3 that comprises three kinds of different-diameters.Section form is trapezoidal, and wire 1 is main silk, and wire 2 is filled in the space of wire 1, and wire 3 is filled in the space between space and wire 1 and the wire 2 between wire 2.Principle is the same, and the metal-rubber characteristic of this kind of structure is all good compared with embodiment one, embodiment two, embodiment three.In wire 1,2,3, can have one or both wires to use memory alloy metal wire, wire that also can three kinds of diameters all adopts memory alloy metal wire.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of making, be equal to replacement, improvement etc., all should be included within the scope of the present invention.
Claims (9)
1. an air bearing structure, be arranged in the rotor support system of high-speed rotating machine, it is characterized in that, described air bearing structure ecto-entad comprises external supporting structure layer, metal-rubber layer peace paper tinsel layer successively, described metal-rubber layer adopts metal-rubber to make, and described metal-rubber forms by wire wrapping wire, braiding, compacting;
In described metal-rubber, mix and take wrapping wire by the wire of combination, at least two kinds of different-diameters of collocation, in the wire of described at least two kinds of different-diameters, the wire of diameter maximum is main silk, between adjacent main silk, be tangent, in the gap between described main silk, be filled with the wire that diameter is less.
2. air bearing structure according to claim 1, is characterized in that, all or part of wire of wire in described metal-rubber is memory alloy metal wire.
3. air bearing structure according to claim 2, is characterized in that, it is rectangular cross-section or trapezoid cross section that the wire in described metal-rubber is wound around cross section.
4. air bearing structure according to claim 1, is characterized in that, in described metal-rubber, it is rectangle that the mixed wire of taking wrapping wire is wound around cross section, and between the main silk of adjacent two layers, two tangent main silk lines of centres are vertical line arbitrarily.
5. air bearing structure according to claim 1, is characterized in that: in described metal-rubber, it is trapezoidal that the mixed wire of taking wrapping wire is wound around cross section, and between the main silk of adjacent two layers, two tangent main silk lines of centres are non-perpendicular line arbitrarily.
6. air bearing structure according to claim 1, is characterized in that: in described metal-rubber, the metal wire mixed of described at least two kinds of different-diameters is taken wrapping wire, is that the metal wire mixed of three kinds of diameters is taken.
7. air bearing structure according to claim 6, is characterized in that: in described metal-rubber, it is the mixed cross sections of taking of rectangular arranged three diameter metal silks that the mixed wire of taking wrapping wire is wound around cross section.
8. air bearing structure according to claim 1, is characterized in that: it is the mixed cross sections of taking of trapezoidal arrangement two diameter metal silks that the mixed wire of taking wrapping wire is wound around cross section.
9. air bearing structure according to claim 1, is characterized in that: it is the mixed cross sections of taking of trapezoidal arrangement three diameter metal silks that the mixed wire of taking wrapping wire is wound around cross section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210301495.2A CN102808848B (en) | 2012-08-22 | 2012-08-22 | Air bearing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210301495.2A CN102808848B (en) | 2012-08-22 | 2012-08-22 | Air bearing structure |
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| CN102808848A CN102808848A (en) | 2012-12-05 |
| CN102808848B true CN102808848B (en) | 2014-10-29 |
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| CN201210301495.2A Active CN102808848B (en) | 2012-08-22 | 2012-08-22 | Air bearing structure |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104653598B (en) * | 2015-03-17 | 2017-09-29 | 湖南大学 | A kind of tilting-pad radial gas bearing |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2363119Y (en) * | 1998-12-29 | 2000-02-09 | 西安交通大学 | Dynamic pressure radial bearing for elastic support foil piece |
| CN2450433Y (en) * | 2000-11-30 | 2001-09-26 | 广汉川江机械制造有限公司 | Metal and non-metal ring pairing radial air bearing shafting |
| CN101044332A (en) * | 2004-10-18 | 2007-09-26 | 韩国科学技术研究院 | Air foil bearing having a porous foil |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4287021B2 (en) * | 2000-04-10 | 2009-07-01 | 本田技研工業株式会社 | Foil type hydrodynamic bearing |
| US6848828B2 (en) * | 2002-03-08 | 2005-02-01 | Ntn Corporation | Foil bearing and spindle device using the same |
| JP2007239962A (en) * | 2006-03-10 | 2007-09-20 | Daido Metal Co Ltd | Multilobe foil gas bearing |
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2012
- 2012-08-22 CN CN201210301495.2A patent/CN102808848B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2363119Y (en) * | 1998-12-29 | 2000-02-09 | 西安交通大学 | Dynamic pressure radial bearing for elastic support foil piece |
| CN2450433Y (en) * | 2000-11-30 | 2001-09-26 | 广汉川江机械制造有限公司 | Metal and non-metal ring pairing radial air bearing shafting |
| CN101044332A (en) * | 2004-10-18 | 2007-09-26 | 韩国科学技术研究院 | Air foil bearing having a porous foil |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2001-295836A 2001.10.26 |
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