CN202360588U - Elastic supporting device for foil dynamic pressure bearing - Google Patents
Elastic supporting device for foil dynamic pressure bearing Download PDFInfo
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- CN202360588U CN202360588U CN2011204317667U CN201120431766U CN202360588U CN 202360588 U CN202360588 U CN 202360588U CN 2011204317667 U CN2011204317667 U CN 2011204317667U CN 201120431766 U CN201120431766 U CN 201120431766U CN 202360588 U CN202360588 U CN 202360588U
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- support body
- pressure bearing
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Abstract
The utility model discloses an elastic supporting device for a foil dynamic pressure bearing, comprising an elastic bearing support composed of an elastic bearing support body and a first key, wherein the first key is arranged at one end of the elastic bearing support body and forms an angle of 70 to 100 degrees with the elastic bearing support body; and a plurality of projections are arranged on the inner and outer surfaces of the elastic bearing support body. The elastic supporting device for the foil dynamic pressure bearing is convenient to manufacture, simple in structure, adjustable in rigidity and high in bearing force, and can be widely applied to the foil dynamic pressure bearing of a high-speed turbomachine.
Description
Technical field
The utility model relates to the foil dynamical pressure bearing of high rate turbine machinery, particularly relates to a kind of foil dynamical pressure bearing resilient supporting unit.
Background technique
Foil bearing is to make oiling agent and adopt a kind of hydraulic bearing of paillon foil as elastic supporting element with fluid.The U.S. is since late 1960s; Successfully be applied on the core coolant parts air cycle machine (ACM) of DC-10 plane environmental control system; Because advantages such as it has and does not have oil, high efficiency, non-maintaining, anti shock and vibration, contamination resistance is strong, reliability is high, the life-span is long; On nearly all aircarrier aircraft afterwards, the air cycle machine that all adopts foil bearing to support.
Foil bearing is divided into blade profile foil bearing and wave mode foil bearing two big classes, generally is made up of top foil and foil dynamical pressure bearing elastic support.Top foil is curled by tinsel and forms, and generally compacting forms foil dynamical pressure bearing elastic support through mould by tinsel.Top foil fits tightly with axle during stationary rotor, produces the dynamic pressure air film during rotor high-speed rotation and pushes top foil open, and axle suspension is floated on the air film.It is to optimize air film to distribute that foil dynamical pressure bearing elastic support mainly acts on, and strengthens bearing load carrying capacity; Simultaneously, foil dynamical pressure bearing elastic support can strengthen the structural damping of bearing, effectively strengthens the product shock resistance.
The raising of foil bearing bearing capacity mainly is the improvement to foil dynamical pressure bearing elastic support.Structural feature and bearing capacity according to foil dynamical pressure bearing elastic support are divided into the three generations to foil bearing.First generation foil bearing is an early production, no foil dynamical pressure bearing elastic support or foil dynamical pressure bearing elastic support rigidity homogeneous, and the foil bearing bearing capacity is very low; The characteristics of second generation foil bearing are that elastic support rigidity changes in a direction (axially perhaps circumferentially), effectively improve the air film structure, have reduced the air leakage of this direction end, and the foil bearing bearing capacity improves a lot; Third generation foil bearing comprises the paillon foil through meticulous cutting of a greater number; Foil dynamical pressure bearing elastic support rigidity changes at both direction (axial and circumferential); The air film structure all is optimized at both direction; Farthest reduce the air leakage of end, further increased the foil bearing bearing capacity.
Though foil bearing has numerous advantages,, cause preparation process very complicated because theoretical research seriously lags behind; Especially foil dynamical pressure bearing elastic support design and produce more complicated; Its design criterion, size are confirmed, material selection, heat treatment and surface treatment etc. all need labor work, and it is very big not only to develop difficulty, and the exploitation input is huge; Technological level requires high; Have only a few company to grasp its designing and manufacturing method at present, its design criterion and preparation process also are in strict restricted area, use minority fields such as also mainly being confined to Aero-Space.
In recent years, some countries begin to develop and have the foil bearing of characteristic separately, the domestic foil bearing elastic support structure that much has independent intellectual property right of also occurring.
Publication number is that CN1563732A, denomination of invention are that CN2363119Y, denomination of invention disclose a kind of elastic support structure that adopts sheet rubber to replace tinsel for the utility model patent of " yielding support foil dynamical pressure radial bearing " for the application for a patent for invention and the publication number of " high rate turbine machinery yielding support flat foil type thrust gas bearing "; This bearing structure is simple; Fabrication and processing is convenient; But the elastic sheet rubber temperature tolerance as supporting is poor, and the bearing elastic support lost efficacy because of overheated causing easily, can't regulate because of rigidity simultaneously; Bearing load carrying capacity is lower, can't realize industrial applications.
Publication number is patent CN101280801A, denomination of invention disclose a kind of tape drum bubble for the application for a patent for invention of a " a kind of kinetic pressure gas bearing structure with radial support foil slice " elastic support structure; This structure has overcome the shortcoming of elastic sheet rubber temperature tolerance difference; But its bubble structure need adopt specialized mould to be stamped to form; And the rigidity homogeneous, bearing capacity is lower.
The model utility content
The purpose of the utility model is in order to overcome the deficiency of above-mentioned background technology, a kind of foil dynamical pressure bearing resilient supporting unit and preparation method thereof to be provided, and makes it have easy to make, simple in structure, economical rationality, rigidity is adjustable, bearing capacity is higher characteristics.
A kind of foil dynamical pressure bearing resilient supporting unit that the utility model provides; Comprise the bearing elastic support of forming by the bearing elastic support body and first key; Said first key is arranged at an end of bearing elastic support body; First key and bearing elastic support body are 70 °～100 °, and inner and outer surface is provided with many convexities on the said bearing elastic support body.
In technique scheme, said bearing elastic support body is provided with many bearing grooves, said bearing groove and protruding intercross arrangement.
In technique scheme, the bulge clearance of said bearing elastic support body inner and outer surface is arranged.
In technique scheme, the unfolded drawing of said bearing elastic support is rectangular or eccentric circular ring.
In technique scheme, said bearing groove has many rows, and the spacing of arranging between the bearing groove is reduced by bearing groove center gradually.
In technique scheme, the spacing between said many convexities is identical.
In technique scheme, the spacing between said many convexities is reduced to the other end by first key gradually.
In technique scheme, the projection thickness of these both sides, inside and outside of said bearing elastic support is inequality.
The foil dynamical pressure bearing resilient supporting unit of the utility model; Has following beneficial effect: because the bearing elastic support adopts on-mechanical processing methods such as chemical corrosion or electrochemical corrosion to make; So need not mould, both easy to make, reduced required cycle and the expense of a large amount of mould development processing again; And the convexity that is processed into not only makes the bearing elastic support keep elasticity preferably; And make the tinsel material that is used as foil dynamical pressure bearing resilient supporting unit also not receive the restriction of metal material mechanics performance, and widened timber range, improved work efficiency.
Selection through material, corrosion depth and groove width; And cut out through the method for stamping-out or line cutting, make and be processed into the bearing elastic support that tape spool holds groove that this bearing elastic support is not only simple in structure; And realized the variation of bearing elastic support rigidity on all directions; And the reasonable distribution through rigidity, make the optimization of bearing air film, improved bearing capacity greatly.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment 1 wave mode bearing;
Fig. 2 is the unfolded drawing of radial bearing elastic support among the utility model embodiment 1;
Fig. 3 is the structural representation of the utility model embodiment 2 blade profile bearings;
Fig. 4 is the expansion plan view of radial bearing elastic support among the utility model embodiment 2;
Fig. 5 is the expansion plan view of radial bearing elastic support among the utility model embodiment 2;
Fig. 6 is the structural representation of the utility model thrust bearing elastic support;
Fig. 7 is the utility model foil bearing gas film pressure distribution schematic diagram vertically.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done further to describe in detail, but this embodiment should not be construed as the restriction to the utility model.
Shown in Figure 1 is wave mode bearing structure schematic representation, and said wave mode bearing comprises bearing housing 1, bearing elastic support 2, top foil 3 and the axle 4 that is provided with from outside to inside successively.Axle 4 is suspended in high speed rotating on the air film, top foil 3 when axle 4 is static since the effect of bearing elastic support 2 fit tightly with axle 4; After axle 4 reaches certain rotating speed; The air film dynamic pressure that produces overcomes the elastic force of bearing elastic support 2, pushes top foil 3 open, and axle 4 is suspended on the air film.In order to strengthen the damping of wave mode bearing, top foil 3 can adopt multilayer, is generally 1 layer to 3 layers; Winding direction can be in the same way, also can be reverse, and the number of plies is many more; Damping and amortization is strong more, but bearing capacity can reduce, and reverse damping and amortization is superior in the same way; But the fabrication and installation required precision is higher, needs trade-off.
Referring to Fig. 2 and Fig. 6, the foil dynamical pressure bearing resilient supporting unit in the utility model wave mode bearing comprises bearing elastic support 2.Said bearing elastic support 2 is made up of the bearing elastic support body 2.4 and first key 2.3; One end of bearing elastic support body 2.4 is provided with first key 2.3; First key 2.3 is 70 °～100 ° with bearing elastic support body 2.4; In the present embodiment, first key 2.3 is 90 ° with bearing elastic support body 2.4.Bearing elastic support body 2.4 inner and outer surface are provided with many convexities 2.1, and the spacing between said many convexities 2.1 is identical, convexity 2.1 separation of said bearing elastic support body 2.4 inner and outer surface.Bearing elastic support body 2.4 is provided with many bearing grooves 2.2, said bearing groove 2.2 and protruding 2.1 intercross arrangement.Said bearing groove 2.2 has many rows, and the spacing of arranging between the bearing groove 2.2 is reduced by bearing groove 2.2 centers gradually, and this arrangement mode can make rigidity reduced gradually by middle mind-set two ends vertically; So just reduce the foil bearing possibility of two ends air leakage vertically, through the choosing and protruding 2.1 highly be the definite of corrosion depth of material, determined the axial distribution of bearing elastic support 2 rigidity jointly simultaneously; In the present embodiment, 2.2 numbers of bearing groove are even number, are generally 2 to 6; Determine the quantity of bearing groove 2.2 cuttings according to the size of bearing elastic support 2 sizes; In most preferred embodiment, bearing groove 2.2 has four, and radial bearing elastic support 2 is divided into 5 parts in the cross section vertically; Spacing width between the said bearing groove 2.2 comprises 3 quantity laterally altogether by the center; Be b1, b2, b3, can determine the axial distribution of bearing elastic support body 2.4 rigidity, wherein b1＞b2＞b3 through choosing of b1, b2 and b3.Fig. 7 has shown that fully the arrangement mode of this spacing makes distribution situation and the effect of pressure on bearing elastic support 2; Curve I is the pressure distribution that bearing elastic support 2 is not passed through cutting; Curve II is that bearing elastic support 2 is through the pressure distribution after the cutting; Curve II shows that bearing elastic support 2 obviously increases through bearing capacity after the cutting.Bearing elastic support 2 comprises radial bearing elastic support and thrust bearing elastic support.Shown in Figure 2 is the unfolded drawing of radial bearing elastic support, and shown in Figure 6 is the unfolded drawing of thrust bearing elastic support, and the unfolded drawing of radial bearing elastic support is a rectangular, and the unfolded drawing of thrust bearing elastic support is an eccentric circular ring.
The making method of said foil dynamical pressure bearing resilient supporting unit is following:
A, on bearing elastic support body 2.4, cut out out bearing groove 2.2 through the method for stamping-out or line cutting.
B, give need reserve on the radial bearing elastic support body 2.4 that protruding 2.1 place coats can etch-proof coating (not shown);
C, the bearing elastic support body 2.4 that will coat coating are put into chemical corrosion liquid (not shown) or electrochemical corrosive liquid (not shown);
The thickness of the convexity 2.1 that D, the time set that corrodes through control need form corrodes the back and takes out bearing elastic support body 2.4;
E, the part that will be corroded are removed from bearing elastic support body 2.4;
F, with coating removal.
Present embodiment is with basic identical with embodiment 1; Difference is: shown in Figure 3 is blade profile bearing structure schematic representation, and the radial bearing elastic support in the said blade profile bearing is joined by multi-disc blade profile radial bearing Flexible element 5 both sides and formed, according to the size of blade profile bearing; Generally choose 4 to 12; The benefit of doing like this is with respect to monolithic, to be easier to assembling, and in the present embodiment, the radial bearing elastic support is made up of 5 blade profile radial bearing Flexible elements 5.
Referring to Fig. 4 to Fig. 5, the spacing between the convexity 2.1 on the blade profile radial bearing Flexible element 5 is reduced to deviating from the other end by first key 2.3 gradually; In the present embodiment, the convexity 2.1 on the blade profile radial bearing Flexible element 5 has 5, and the spacing between protruding 2.1 comprises a1, a2, a3 and a4; Wherein a1 is near a side of first key 2.3; A4 is positioned at a side that deviates from first key 2.3, and a2 and a3 are positioned between the two successively, a1＞a2＞a3＞a4.Under the same thickness situation; Spacing is big more; Rigidity is more little, and the layout of the circumferential variation of spacing makes that the circumferential Stiffness Distribution of blade profile radial bearing Flexible element 5 is more reasonable between this protruding 2.1, has obviously improved the bearing capacity of blade profile radial bearing Flexible element 5.In the present embodiment; Blade profile radial bearing Flexible element 5 is provided with two bearing grooves 2.2; Bearing groove 2.2 is divided into 3 parts in the cross section vertically with blade profile radial bearing Flexible element 5, and the spacing width between the said radial bearing groove 2.2 comprises 2 quantity, i.e. b1, b2 laterally altogether by the center; Can determine the axial distribution of blade profile radial bearing Flexible element 5 rigidity, wherein b1＞b2 through choosing of b1 and b2.Fig. 7 has shown that fully the arrangement mode of this spacing makes distribution situation and the effect of pressure on bearing elastic support 2; Curve I is the pressure distribution that bearing elastic support 2 is not passed through cutting; Curve II is that bearing elastic support 2 is through the pressure distribution after the cutting; Curve II shows that bearing elastic support 2 obviously increases through bearing capacity after the cutting.The internal projection 2.1.1 and the outer lug 2.1.2 of blade profile radial bearing Flexible element 5 highly are respectively h1 and h2, the inside and outside degree of depth of promptly corroding, and h1 and h2 can be the same or different; During h1=h2, only need to reach requirement, when h1 ≠ h2 through once corroding inner and outer surface; Corrosion need be carried out at twice, and promptly earlier will one side coat fully can etch-proof coating, with another side corrosion earlier; Control the time well, treat that the another side corrosion depth reaches requirement after, the coating removal of the part that the one side of complete coated need be corroded; Put into chemical corrosion liquid or electrochemical corrosive liquid corrodes, control the time well according to required corrosion depth and get final product.
Obviously, those skilled in the art can carry out various changes and modification to the utility model and not break away from the spirit and the scope of the utility model.Like this, belong within the scope of the utility model claim and equivalent technologies thereof if these of the utility model are revised with modification, then the utility model also is intended to comprise these changes and modification interior.
The content of not doing in this specification to describe in detail belongs to related domain professional and technical personnel's known prior art.
Claims (8)
1. foil dynamical pressure bearing resilient supporting unit; It is characterized in that: it comprises the bearing elastic support of being made up of bearing elastic support body (2.4) and first key (2.3) (2); Said first key (2.3) is arranged at an end of bearing elastic support body (2.4); First key (2.3) is 70 °～100 ° with bearing elastic support body (2.4), and said bearing elastic support body (2.4) is gone up inner and outer surface and is provided with many convexities (2.1).
2. foil dynamical pressure bearing resilient supporting unit according to claim 1 is characterized in that: said bearing elastic support body (2.4) is provided with many bearing grooves (2.2), said bearing groove (2.2) and protruding (2.1) intercross arrangement.
3. foil dynamical pressure bearing resilient supporting unit according to claim 2 is characterized in that: convexity (2.1) separation of said bearing elastic support body (2.4) inner and outer surface.
4. foil dynamical pressure bearing resilient supporting unit according to claim 3 is characterized in that: the unfolded drawing of said bearing elastic support (2) is rectangular or eccentric circular ring.
5. foil dynamical pressure bearing resilient supporting unit according to claim 4 is characterized in that: said bearing groove (2.2) has many rows, and the spacing of arranging between the bearing groove (2.2) is reduced by bearing groove (2.2) center gradually.
6. foil dynamical pressure bearing resilient supporting unit according to claim 5 is characterized in that: the spacing between said many convexities (2.1) is identical.
7. foil dynamical pressure bearing resilient supporting unit according to claim 5 is characterized in that: the spacing between said many convexities (2.1) is reduced to the other end by first key (2.3) gradually.
8. foil dynamical pressure bearing resilient supporting unit according to claim 7 is characterized in that: convexity (2.1) thickness of the inside and outside both sides of said bearing elastic support body (2.4) is inequality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204317667U CN202360588U (en) | 2011-11-04 | 2011-11-04 | Elastic supporting device for foil dynamic pressure bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204317667U CN202360588U (en) | 2011-11-04 | 2011-11-04 | Elastic supporting device for foil dynamic pressure bearing |
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| Publication Number | Publication Date |
|---|---|
| CN202360588U true CN202360588U (en) | 2012-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204317667U Expired - Fee Related CN202360588U (en) | 2011-11-04 | 2011-11-04 | Elastic supporting device for foil dynamic pressure bearing |
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| Country | Link |
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| CN (1) | CN202360588U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434580A (en) * | 2011-11-04 | 2012-05-02 | 武汉航达航空科技发展有限公司 | Elastic support device for foil dynamic bearing and manufacturing method thereof |
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2011
- 2011-11-04 CN CN2011204317667U patent/CN202360588U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434580A (en) * | 2011-11-04 | 2012-05-02 | 武汉航达航空科技发展有限公司 | Elastic support device for foil dynamic bearing and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120801 Termination date: 20141104 |
|
| EXPY | Termination of patent right or utility model |