CN102808848A - Air bearing structure - Google Patents

Air bearing structure Download PDF

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Publication number
CN102808848A
CN102808848A CN2012103014952A CN201210301495A CN102808848A CN 102808848 A CN102808848 A CN 102808848A CN 2012103014952 A CN2012103014952 A CN 2012103014952A CN 201210301495 A CN201210301495 A CN 201210301495A CN 102808848 A CN102808848 A CN 102808848A
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CN
China
Prior art keywords
wire
metal
rubber
air bearing
taking
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CN2012103014952A
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Chinese (zh)
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CN102808848B (en
Inventor
陈巍
郭宝亭
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中国科学院工程热物理研究所
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Priority to CN201210301495.2A priority Critical patent/CN102808848B/en
Publication of CN102808848A publication Critical patent/CN102808848A/en
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Publication of CN102808848B publication Critical patent/CN102808848B/en

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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

A kind of air bearing structure

Technical field

The invention belongs to design bearing or rotary power machinery and support 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 are key technologies in the rotary machine design, concern 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.Yet its key designing technique is still grasped in advanced technology such as the U.S., Russia, Japan country.China does not have the designed capacity and the successful precedent of pneumatic bearing system at present.But the domestic market demand is extremely huge, is containing huge economic benefit.

Shown in Fig. 8-10; Pneumatic bearing structurally comprises flat paper tinsel layer (1), ripple paper tinsel layer (2) and based on 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, it is ripe that its design, the marketization have been tending towards.In addition, modern pneumatic bearing also has certain technical bottleneck: bearing capacity has much room for improvement, to satisfy the support demand of large rotor; Ripple paper tinsel layer tangential Stiffness Distribution is uneven, and the Coulomb damping effect can't be brought into play to greatest extent; Under the gas film pressure effect, axial effective rigidity skewness, Coulomb damping is used limited, and bearing capacity is restricted.These circumscribed existence are the sheet type structures owing to ripple paper tinsel layer, and the characteristics of aerodynamic loading non-uniform Distribution on supporting surface achievements.Therefore,, solve above-mentioned bottleneck point, just can make the application and the Applicable scope of pneumatic bearing, further promoted if can propose a kind of supporting structure.Especially for China, not only grasp independent intellectual property right, more broken through the blockade on new techniques of association area, had great construction value and economic implications.

Summary of the invention

The object of the invention; Be to propose a kind of novel air bearing structure; Air bearing structure to existing technology improves; Use the metal-rubber layer to replace the ripple paper tinsel supporting structure in the conventional air bearing structure, on the basis that keeps conventional air bearing length life-span, low cost, simple in structure, non-maintaining advantage, characteristics such as low in conjunction with the metal-rubber cost, that adaptability is strong, bearing capacity is big, effectiveness in vibration suppression is outstanding; Thereby satisfy such as of the requirement of high-speed rotating machines such as aeroengine, further promoted the application and the Applicable scope of pneumatic bearing rotor supports.

For achieving the above object; The present 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, said air bearing structure ecto-entad comprises based on external supporting structure layer, metal-rubber layer peace paper tinsel layer successively; Said metal-rubber layer adopts metal-rubber to process, and said metal-rubber forms through wire wrapping wire, braiding, compacting.

Preferably, all or part of wire of wire in the said metal-rubber is the memory alloy wire.

Preferably, the winding of the wire in said metal-rubber cross section is rectangular cross-section or trapezoid cross section or other analogous shape.

Preferably; In the said metal-rubber; Wire through combination, at least two kinds of different-diameters of collocation mixes and takes wrapping wire, and in the wire of said at least two kinds of different-diameters, the maximum wire of diameter is main; Between the adjacent main silk is tangent, is filled with the less wire of diameter in the gap between the said main silk.

Preferably, in the said metal-rubber, mixing the wire winding cross section of taking wrapping wire is rectangle, and between the adjacent two layers master silk, two tangent arbitrarily main silk lines of centres are vertical line.

Preferably, in the said metal-rubber, it is trapezoidal mixing the wire winding cross section of taking wrapping wire, and between the adjacent two layers master silk, two tangent arbitrarily main silk lines of centres are non-perpendicular line.

Preferably, in the said metal-rubber, the metal wire mixed of said 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 the said metal-rubber, mixing the wire winding cross section of taking wrapping wire can be the mixed cross sections of taking of rectangular arranged three diameter metal silks.

Preferably, in the said metal-rubber, mixing the wire winding cross section of taking wrapping wire can be the mixed cross sections of taking of trapezoidal arrangement two diameter metal silks.

Preferably, in the said metal-rubber, mixing the wire winding cross section of taking wrapping wire can be the mixed cross sections of taking of trapezoidal arrangement three diameter metal silks.

The deficiency of conventional air bearing is: bearing capacity is not high enough, is difficult to satisfy the support demand of large rotor; Ripple paper tinsel layer tangential Stiffness Distribution wherein is uneven, and the Coulomb damping effect can't be brought into play to greatest extent; Under the gas film pressure effect, axial effective rigidity skewness, Coulomb damping is used limited, and bearing capacity is restricted.These circumscribed existence are the sheet type structures owing to ripple paper tinsel layer, and the characteristics of aerodynamic loading non-uniform Distribution on supporting surface achievements.

In the novel air bearing structure of the present invention; Use the metal-rubber layer to substitute the ripple paper tinsel layer in the conventional air bearing; Conventional air bearing length life-span, low cost, simple in structure, non-maintaining advantage had both been kept; Characteristics such as the metal-rubber cost is low, adaptability is strong, bearing capacity is big, effectiveness in vibration suppression is outstanding have been combined again; Thereby make air bearing structure of the present invention can satisfy, further promoted the application and the Applicable scope of pneumatic bearing such as of the requirement of high-speed rotating machines such as aeroengine to rotor supports.

Air bearing structure of the present invention is compared with the pneumatic bearing of existing technology, and its advantage is:

1, conventional air bearing length life-span, low cost, simple in structure, non-maintaining advantage have been kept; Characteristics such as the metal-rubber cost is low, adaptability is strong, bearing capacity is big, effectiveness in vibration suppression is outstanding have been combined again; Thereby make air bearing structure of the present invention can satisfy, further promoted the application and the Applicable scope of pneumatic bearing such as of the requirement of high-speed rotating machines such as aeroengine to rotor supports.

2, the pneumatic bearing of processing for all or part of use memory alloy metal-rubber wiry; Also utilized of the variation of memory alloy wire along with Environmental Conditions and operating temperature; The characteristic that memory alloy can deform; Thereby change the whole stiffness characteristics of self and metal-rubber, realize pneumatic bearing for the supporting object with servo characteristic.Help reducing to support the excursion of object dynamic performance, enhanced stability, and then can increase the service life.

Description of drawings

Fig. 1 pneumatic bearing unfolded drawing that has the metal-rubber layer of the present invention;

Fig. 2 metal-rubber structural upright schematic representation;

Fig. 3 metal-rubber sectional view;

Fig. 4 rectangular arranged two diameter metal silks mix takes the cross section;

Fig. 5 rectangular arranged three diameter metal silks mix takes the cross section;

The trapezoidal arrangement two diameter metal silks of Fig. 6 mix takes the cross section;

The trapezoidal arrangement three diameter metal silks of Fig. 7 mix takes the cross section;

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 the object of the invention, technological scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, to further explain of the present invention.

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; Said air bearing structure ecto-entad comprises based on external supporting structure layer 1, metal-rubber layer 2 peaceful paper tinsel layer 3 successively; Said metal-rubber layer 2 adopts metal-rubber to process, and the structure of common metal-rubber is as shown in Figure 2, and said metal-rubber forms through wire wrapping wire, braiding, compacting.The all or part of wire of wire in the said metal-rubber is the memory alloy wire.

Fig. 3-7 shows the metal-rubber form that the air bearing structure among some embodiments possibly use.As shown in Figure 3, in the metal-rubber, all diameters wiry are identical, and metal-rubber uses the wire of single diameter to twine compacting and forms.

As shown in Figure 4, in the metal-rubber, comprise the wire 1,2 of two kinds of different-diameters.Section form is a rectangle, and wire 1 is main silk, and wire 2 is filled in the space of wire 1.At this moment, wire 1 contacts with 8 one metal wires simultaneously, that is 8 rubbing surfaces are arranged, and damping characteristic is enhanced; Simultaneously, the whole structural dynamic characteristic of metal-rubber is improved, and has also improved the reliability under the abominable service condition.In the wire 1,2, can have a kind of wire to use the memory alloy wire, wire that also can two kinds of diameters all adopts the memory alloy wire.Through using the memory alloy wire; Utilize of the variation of memory alloy wire along with Environmental Conditions and operating temperature; The characteristic that memory alloy can deform, thus change the whole stiffness characteristics of self and metal-rubber, realize supporting structure for the supporting object with servo characteristic.Help reducing to support the excursion of object dynamic performance, enhanced stability, and then can increase the service life.Simultaneously, the loss that metal-rubber itself receives also can reduce, and improves the serviceability of itself.

As shown in Figure 5, in the metal-rubber, comprise the wire 1,2 and 3 of three kinds of different-diameters.Section form is a rectangle, and wire 1 is main silk, and wire 2 is filled in the space of wire 1, and wire 3 is filled in space and the space between wire 1 and the wire 2 between the wire 2.At this moment, wire 1 has more rubbing surface number, and damping characteristic and reliability are better than embodiment one.In the wire 1,2,3, can have one or both wires to use the memory alloy wire, wire that also can three kinds of diameters all adopts the memory alloy wire.

As shown in Figure 6, in the metal-rubber, comprise the wire 1 and 2 of 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 the adjacent two layers, its line of centres 1-5 is non-perpendicular line.At this moment, only consider the surface of contact between the main silk, single main silk has 6 surface of contact; Add the influence 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 the trapezoid cross section, the collocation mode between the main silk makes its structure stability also be superior to the rectangular cross-section.In the wire 1,2, can have a kind of wire to use the memory alloy wire, wire that also can two kinds of diameters all adopts the memory alloy wire.When contrast, the wire diameter of similar number, the trapezoid cross section is more excellent than rectangular cross-section performance.

As shown in Figure 7, in the metal-rubber, comprise the wire 1,2 and 3 of 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 space and the space between wire 1 and the wire 2 between the wire 2.Principle is the same, and the metal-rubber characteristic of this kind structure is all good than embodiment one, embodiment two, embodiment three.In the wire 1,2,3, can have one or both wires to use the memory alloy wire, wire that also can three kinds of diameters all adopts the memory alloy wire.

The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope of the present invention.

Claims (10)

1. air bearing structure; Be arranged in the rotor support system of high-speed rotating machine; It is characterized in that; Said air bearing structure ecto-entad comprises based on external supporting structure layer, metal-rubber layer peace paper tinsel layer successively, and said metal-rubber layer adopts metal-rubber to process, and said metal-rubber forms through wire wrapping wire, braiding, compacting.
2. air bearing structure according to claim 1 is characterized in that, all or part of wire of the wire in the said metal-rubber is the memory alloy wire.
3. air bearing structure according to claim 2 is characterized in that, it is rectangular cross-section or trapezoid cross section or other analogous shape that the wire in the said metal-rubber twines the cross section.
4. according to each described air bearing structure of claim 1 to 3; It is characterized in that in the said metal-rubber, the wire through combination, at least two kinds of different-diameters of collocation mixes and takes wrapping wire; In the wire of said at least two kinds of different-diameters; The maximum wire of diameter is main silk, is tangent between the adjacent main silk, is filled with the less wire of diameter in the gap between the said main silk.
5. air bearing structure according to claim 4 is characterized in that, in the said metal-rubber, mixing the wire winding cross section of taking wrapping wire is rectangle, and between the adjacent two layers master silk, two tangent arbitrarily main silk lines of centres are vertical line.
6. air bearing structure according to claim 4 is characterized in that: in the said metal-rubber, it is trapezoidal mixing the wire winding cross section of taking wrapping wire, and between the adjacent two layers master silk, two tangent arbitrarily main silk lines of centres are non-perpendicular line.
7. air bearing structure according to claim 4 is characterized in that: in the said metal-rubber, the metal wire mixed of said 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.
8. air bearing structure according to claim 7 is characterized in that: in the said metal-rubber, mixing the wire winding cross section of taking wrapping wire can be the mixed cross sections of taking of rectangular arranged three diameter metal silks.
9. air bearing structure according to claim 4 is characterized in that: mixing the wire winding cross section of taking wrapping wire can be the mixed cross sections of taking of trapezoidal arrangement two diameter metal silks.
10. metal-rubber according to claim 4 is characterized in that: mixing the wire winding cross section of taking wrapping wire can be the mixed cross sections of taking of trapezoidal arrangement three diameter metal silks.
CN201210301495.2A 2012-08-22 2012-08-22 Air bearing structure CN102808848B (en)

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CN102808848B CN102808848B (en) 2014-10-29

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104653598A (en) * 2015-03-17 2015-05-27 湖南大学 Novel tilting pad radial gas bearing

Citations (6)

* Cited by examiner, † Cited by third party
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
JP2001295836A (en) * 2000-04-10 2001-10-26 Honda Motor Co Ltd Foil type fluid bearing
US20030169951A1 (en) * 2002-03-08 2003-09-11 Ntt Corporation Foil bearing and spindle device using the same
US20070211970A1 (en) * 2006-03-10 2007-09-13 Daido Metal Co., Ltd. Multi-lobe foil gas bearing
CN101044332A (en) * 2004-10-18 2007-09-26 韩国科学技术研究院 Air foil bearing having a porous foil

Patent Citations (6)

* Cited by examiner, † Cited by third party
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
JP2001295836A (en) * 2000-04-10 2001-10-26 Honda Motor Co Ltd Foil type fluid bearing
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
US20030169951A1 (en) * 2002-03-08 2003-09-11 Ntt Corporation Foil bearing and spindle device using the same
CN101044332A (en) * 2004-10-18 2007-09-26 韩国科学技术研究院 Air foil bearing having a porous foil
US20070211970A1 (en) * 2006-03-10 2007-09-13 Daido Metal Co., Ltd. Multi-lobe foil gas bearing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104653598A (en) * 2015-03-17 2015-05-27 湖南大学 Novel tilting pad radial gas bearing

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