CN102889324A - Stationary disc of aircraft carbon brake disc brake - Google Patents
Stationary disc of aircraft carbon brake disc brake Download PDFInfo
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- CN102889324A CN102889324A CN201210402971XA CN201210402971A CN102889324A CN 102889324 A CN102889324 A CN 102889324A CN 201210402971X A CN201210402971X A CN 201210402971XA CN 201210402971 A CN201210402971 A CN 201210402971A CN 102889324 A CN102889324 A CN 102889324A
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Abstract
The invention relates to a stationary disc of an aircraft carbon brake disc brake. The stationary disc consists of a first friction layer, a second friction layer and a buffer layer, wherein the buffer layer is positioned between the first friction layer and the second friction layer; the surfaces of the first friction layer and the second friction layer adjacent to the buffer layer are non-friction surfaces; and inner holes of the first friction layer and the second friction layer are step holes, and the length of the large-aperture end of each inner hole is 1/3 to 1/4 of the thickness of the corresponding friction layer. When the stationary disc is mounted, a key groove of the buffer layer is aligned to key grooves of the first friction layer and the second friction layer to form the stationary disc. A required number of stationary discs and movable discs are arranged at intervals. With the adoption of the stationary disc, moment heads during the braking of an aircraft can be eliminated, a moment curve of stably increasing moment is acquired, locking, skidding and tire bust phenomena during the brake are eliminated, and smoothness, comfort and safety of the braking process are increased.
Description
Technical field
The present invention relates to airplane carbon brake disc, specifically a kind of quiet dish that can reduce aircraft brake moment leading peak.
Technical background
In the process of airplane landing and taking-off, airplane wheel except cross support and the two large functions of rolling, also have the third-largest function: brake function.This function is the aircraft of high speed slide to be stopped according to certain deceleration rate to stop to specified position on airfield runway.
Airplane wheel is comprised of wheel hub, tire, braking device; Braking device is comprised of brake housing, cylinder seat, brake disc again; Brake disc divides two kinds on Moving plate and quiet dish, and wherein the cylindrical of Moving plate has keyway, and this groove cooperates with guide rail on the wheel, so Moving plate rotates with wheel; And the inner circle of quiet dish has keyway, and this groove cooperates with the prominent key of brake on the housing, because the housing that brakes do not rotate, so quiet dish does not rotate yet; Moving plate and quiet dish are interlaced placements at the brake housing.When needs braked, the piston of cylinder seat was along the axial pressure of brake housing, and brake disc compresses mutually under pressure, and the quiet dish that does not rotate and the Moving plate of the rotation generation brake torque that rubs mutually is heat energy with the kinetic transformation of aircraft, thereby stops grounding machine.
The material of brake disc is along with aircraft can carry the level rise, develop into carbon back from initial resin base, be carbon/carbon compound material, this material is low because of density, specific strength is high, specific heat capacity is large, the brake advantage such as non-caked obtains extensive use, is the main braking material of modern army civil aircraft.The brake disc that adopts carbon/carbon compound material to make is called for short carbon brake disc.Although carbon brake disc has plurality of advantages, some shortcomings are arranged also.A major defect is exactly can occur moment in the brake process to rush the peak, and the moment at the initial stage of especially braking is rushed the peak, and namely the moment leading peak can cause wheel locking or tyre slip, causes tire heavy wear, even blows out, and affects Flight Safety.Rush the peak for existing moment, solve by adjusting brake pressure.
Summary of the invention
Rush the peak phenomenon for overcoming the brake torque that exists in the prior art, especially the moment forward the present invention proposes the quiet dish that a kind of airplane carbon brake disc brakes.
Quiet dish of the present invention is comprised of first friction layer, a buffer layer and second friction layer, and described buffer layer is between the first friction layer and second friction layer; The surface that described the first friction layer and the second friction layer are adjacent with buffer layer is non-rubbing surface; The endoporus of the first friction layer and the second friction layer is step hole, and the length of described endoporus large aperture end is 1/3～1/4 of friction layer thickness of living in.
The thickness of described the first friction layer and the second friction layer is 12～18mm.The thickness of described buffer layer is 1mm-2mm.
Described the first friction layer and the second friction layer endoporus large pore end are positioned at rubbing surface one side of friction layer of living in, and the diameter of described the first friction layer and the second friction layer endoporus large pore is than the large 12mm-20mm of diameter of small aperture.
The quiet dish of each of carbon brake disc of the present invention forms by the first friction layer, the second friction layer and an elastic cord breaker, and wherein buffer layer is clipped between the first friction layer and the second friction layer.Rubbing surface in described the first friction layer and the second friction layer end face with Moving plate on the brake housing is adjacent, and mutually friction in brake process and between the end face of Moving plate, produces brake torque.
During installation, the keyway of buffer layer aligns with the keyway of the first friction layer and the second friction layer, is combined into a quiet dish.Should quiet dish and the Moving plate interval be installed to desired quantity.
Described the first friction layer, the second friction layer be all take the carbon fiber Nomex as precast body, and the carbon/carbon compound material that forms through chemical vapor deposition is made, and the density of carbon/carbon compound material should be greater than 1.7g/cm
3, the percentage by volume of carbon fiber is 30%-40%; Described buffer layer is to adopt satin weave carbon cloth take the establishment of 12k carbon filament as precast body, and the carbon/carbon compound material that forms through chemical vapor deposition is made, and the density of carbon/carbon compound material is 1.1g/cm
3-1.4g/cm
3
The plotted curve that Fig. 5 and Fig. 6 adopt BM757-HX type airplane wheel to carry out stand test at the state aviation wheel dynamic test center of Britain CAA and Chinese CAAC authentication.Curve among the figure is M curve.The A curve is the brake torque curve that buffer layer is arranged among Fig. 5, and the moment forward of its M curve is 20.1KNM; The B curve is the brake torque curve without buffer layer among Fig. 6, and the moment forward of its M curve is 24.5KNM.Can find out by curve comparison: the quiet dish with buffer layer can effectively be eliminated the moment forward in the aircraft brake process.This is owing to having certain flexible buffer layer so that be applied to the time lengthening that brake pressure on the carbon brake disc reaches rating value, and eliminated the instantaneous impact between the carbon brake disc, thereby eliminated forward on the brake torque curve, obtained the stable M curve that increases of moment, eliminate the phenomenon of skidding and blow out of the locking in the brake process, increased stationarity, travelling comfort, the Security of brake process.
Description of drawings
Fig. 1 is the mounting point schematic diagram of quiet dish on device.
Fig. 2 is the structural representation of quiet dish; Wherein, Fig. 2 a is plan view, and Fig. 2 b is side view.
Fig. 3 is plan view and the side view of the first friction layer; Wherein, Fig. 3 a is plan view, and Fig. 3 b is side view.
Fig. 4 is plan view and the side view of buffer layer; Wherein, Fig. 4 a is plan view, and Fig. 4 b is side view.
Fig. 5 is the brake torque curve without buffer layer.
Fig. 6 is the brake torque curve that buffer layer is arranged.Among the figure:
1. compression plate 2. Moving plates 3. first friction layers 4. buffer layers 5. second friction layers
6. bearing disc 7. brake housings
Embodiment
Embodiment one
The present embodiment is a kind of quiet dish that can improve the airplane carbon brake disc braking quality.Described quiet dish is used for the brake disc of BM757-HX type airplane wheel.
Described quiet dish is comprised of first friction layer 3, a buffer layer 4 and second friction layer 5, and described buffer layer 4 is between the first friction layer 3 and second friction layer 5.The thickness of the first friction layer 3 equates with the thickness of the second friction layer 5.According to different types, the thickness of the thickness of the first friction layer 3 and the second friction layer 5 is 12～18mm.In the present embodiment, the thickness of the thickness of the first friction layer 3 and the second friction layer 5 is 12mm.
Described the first friction layer 3 is all identical with structure and the boundary dimension of the second friction layer 4, in the present embodiment, only take the first friction layer 3 as example, the technical characteristics of the first friction layer 3 and the second friction layer 4 is described.
Two end faces of the first friction layer 3 are respectively rubbing surface and non-rubbing surface.There is step-like endoporus at the center of the first friction layer 3, and this step-like endoporus is positioned at the aperture of rubbing surface one end of the first friction layer greater than the aperture of non-rubbing surface one end.The little 12mm-20mm in aperture of aperture ratio the first friction layer rubbing surface one end of non-rubbing surface one end of described the first friction layer, in the present embodiment, the little 18mm in aperture of aperture ratio the first friction layer rubbing surface one end of the first friction layer non-rubbing surface one end.The aperture of the first friction layer 3 center holes is identical with the external diameter of brake housing 7 central shafts.The axial length of the first friction layer 3 step hole large pore sections is 1/3 of these the first friction layer 3 step hole small aperture section axial lengths.Bore area at the non-rubbing surface of the first friction layer is evenly distributed with a plurality of keyways, protruding bond number amount, the width, highly identical of the quantity of this keyway, width, the degree of depth and brake housing 7.The keyway of the first friction layer non-rubbing surface bore area cooperates with the protruding key of brake on the housing.
The excircle of described the first friction layer is isometrical circumference.The endoporus of described the first friction layer is shoulder hole, and in this shoulder hole, the aperture of rubbing surface one side of contiguous this first friction layer is greater than the aperture of contiguous this first friction layer non-rubbing surface one side.In described the first friction layer ladder endoporus, the axial length at place, large aperture is 1/3～1/4 of the first friction layer thickness.The thickness of the first friction layer is 8mm-15mm, and the axial length at the first friction layer ladder endoporus large pore place is 2mm-5mm.The thickness of the first friction layer is 12mm in the present embodiment, and the axial length at the first friction layer ladder endoporus large pore place is 4mm.
Anti-oxidation processing all need be carried out in the surface of described the first friction layer 3 except rubbing surface.
The quantity of the internal diameter of described buffer layer 4, external diameter, inner circle keyway, size, distribution mode all with structure, the profile and measure-alike of the first friction layer 3 or the second friction layer 5.The thickness of described buffer layer 4 is 1mm-2mm, and the thickness of buffer layer 4 is 1.5mm in the present embodiment; The all surface of described buffer layer 4 all need carry out anti-oxidation processing.
Described the first friction layer 3 and the second friction layer 5 are all made with carbon/carbon compound material; Described carbon/carbon compound material is take the carbon fiber Nomex as precast body, forms by the conventional chemical CVD (Chemical Vapor Deposition) method, and the density of this carbon/carbon compound material should be greater than 1.7g/cm
3, the percentage by volume of carbon fiber is 30%-40%.Described buffer layer 4 usefulness carbon/carbon compound materials are made; Described carbon/carbon compound material be satin weave carbon cloth take 12k carbon filament establishment as precast body, form by the conventional chemical CVD (Chemical Vapor Deposition) method, the density of this carbon/carbon compound material is 1.1g/cm
3-1.4g/cm
3
During installation, buffer layer 4 is between the first friction layer 3 and the second friction layer 5, and two end surfaces that make this buffer layer 4 are fitted with the non-rubbing surface of the first friction layer 3 and the second friction layer 5 respectively.The keyway of buffer layer is alignd with the keyway of the first friction layer and the second friction layer, be combined into a quiet dish.Quiet dish and bearing disc 6, each Moving plate 2 and compression plate 1 are installed on the brake housing 7, are combined into brake disc.Need 3 quiet dishes in the brake disc of the present embodiment.The cooperation order of the bearing disc 6 in this brake disc, each Moving plate 2, compression plate 1 and each quiet dish is successively: bearing disc 6 → Moving plate 2 → quiet dish → Moving plate 2 → quiet dish → Moving plate 2 → quiet dish → Moving plate 2 → compression plate 1.
The plotted curve that Fig. 5 and Fig. 6 adopt BM757-HX type airplane wheel to carry out stand test at the state aviation wheel dynamic test center of Britain CAA and Chinese CAAC authentication.Curve among the figure is M curve.The A curve is the brake torque curve that buffer layer is arranged among Fig. 5, and the moment forward of its M curve is 20.1KNM; The B curve is the brake torque curve without buffer layer among Fig. 6, and the moment forward of its M curve is 24.5KNM.Can find out by curve comparison: the quiet dish with buffer layer can be eliminated the moment forward in the aircraft brake process, guarantees to avoid brake locking phenomenon and Flight Safety.
Embodiment two
The present embodiment is the quiet dish of LS148 wheel braking dish.
Described quiet dish is comprised of first friction layer 3, a buffer layer 4 and second friction layer 5.The thickness of the first friction layer 3 equates with the thickness of the second friction layer 5.According to different types, the thickness of the thickness of the first friction layer 3 and the second friction layer 5 is 18mm.
Described the first friction layer 3 is all identical with structure and the boundary dimension of the second friction layer 4, in the present embodiment, only take the first friction layer 3 as example, the technical characteristics of the first friction layer 3 and the second friction layer 4 is described.
Two end faces of the first friction layer 3 are respectively rubbing surface and non-rubbing surface.There is step-like endoporus at the center of the first friction layer 3, and this step-like endoporus is positioned at the aperture of rubbing surface one end of the first friction layer greater than the aperture of non-rubbing surface one end.The little 12mm-20mm in aperture of aperture ratio the first friction layer rubbing surface one end of non-rubbing surface one end of described the first friction layer, in the present embodiment, the little 16mm in aperture of aperture ratio the first friction layer rubbing surface one end of the first friction layer non-rubbing surface one end.The aperture of the first friction layer 3 center holes is identical with the external diameter of brake housing 7 central shafts.The axial length of the first friction layer 3 step hole large pore sections is 1/3 of these the first friction layer 3 step hole small aperture section axial lengths.Bore area at the non-rubbing surface of the first friction layer is evenly distributed with a plurality of keyways, protruding bond number amount, the width, highly identical of the quantity of this keyway, width, the degree of depth and brake housing 7.The keyway of the first friction layer non-rubbing surface bore area cooperates with the protruding key of brake on the housing.
The structure of the second friction layer 5, profile and size all with structure, the profile and measure-alike of the first friction layer 3.
The external diameter of buffer layer 4 is identical with the external diameter of the first friction layer 3.The internal diameter of buffer layer 4 is identical with the aperture of the first friction layer 3 step-like endoporus small aperture sections.The thickness of buffer layer 4 is 1mm-2mm, and buffer layer 4 thickness are 1.2mm in the present embodiment; Be distributed with a plurality of keyways at described buffer layer 4 internal circular surfaces; The position of the quantity of this keyway, width, the degree of depth and distribution is all identical with the position of quantity, width, the degree of depth and distribution of keyway on the first friction layer 3.
Described the first friction layer 3 and the second friction layer 5 are all made with carbon/carbon compound material; Described carbon/carbon compound material is take the carbon fiber Nomex as precast body, forms by the conventional chemical CVD (Chemical Vapor Deposition) method, and the density of this carbon/carbon compound material should be greater than 1.7g/cm
3, the percentage by volume of carbon fiber is 30%-40%.Described buffer layer 4 usefulness carbon/carbon compound materials are made; Described carbon/carbon compound material be satin weave carbon cloth take 12k carbon filament establishment as precast body, form by the conventional chemical CVD (Chemical Vapor Deposition) method, the density of this carbon/carbon compound material is 1.1g/cm
3-1.4g/cm
3
During installation, during installation, buffer layer 4 is between the first friction layer 3 and the second friction layer 5, and two end surfaces that make this buffer layer 4 are fitted with the non-rubbing surface of the first friction layer 3 and the second friction layer 5 respectively.The keyway of buffer layer is alignd with the keyway of the first friction layer and the second friction layer, be combined into a quiet dish.Quiet dish and bearing disc 6, each Moving plate 2 and compression plate 1 are installed on the brake housing 7, are combined into brake disc.Need a quiet dish in the brake disc of the present embodiment.The cooperation order of the bearing disc 6 in this brake disc, each Moving plate 2, compression plate 1 and quiet dish is successively: bearing disc 6 → Moving plate 2 → quiet dish → Moving plate 2 → compression plate 1.
The LS148 wheel that employing contains buffer layer has carried out stand test at state aviation wheel dynamic test center, the M curve that obtains is similar to Fig. 5 M curve shape, proved that also the quiet dish structure with buffer layer can make airplane wheel can eliminate the brake torque forward in brake process, avoid the brake locking phenomenon, ensure flight safety.
Claims (4)
1. the quiet dish of airplane carbon brake disc brake is characterized in that, described quiet dish is comprised of first friction layer, a buffer disc and second friction layer, and described buffer disc is between the first friction layer and second friction layer; The surface that described the first friction layer and the second friction layer are adjacent with buffer disc is non-rubbing surface; The endoporus of the first friction layer and the second friction layer is step hole, and the length of described endoporus large aperture end is 1/3～1/4 of friction layer thickness of living in.
2. the quiet dish of a kind of airplane carbon brake disc brake as claimed in claim 1 is characterized in that, the thickness of described the first friction layer and the second friction layer is 12～18mm.
3. the quiet dish of a kind of airplane carbon brake disc brake as claimed in claim 1, it is characterized in that, described the first friction layer and the second friction layer endoporus large pore end are positioned at rubbing surface one side of friction layer of living in, and the diameter of described the first friction layer and the second friction layer endoporus large pore is than the large 12mm-20mm of diameter of small aperture.
4. improve as claimed in claim 1 the quiet dish of airplane carbon brake disc braking quality, it is characterized in that, the thickness of described buffer disc is 1mm-2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210402971.XA CN102889324B (en) | 2012-10-18 | 2012-10-18 | Stationary disc of aircraft carbon brake disc brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210402971.XA CN102889324B (en) | 2012-10-18 | 2012-10-18 | Stationary disc of aircraft carbon brake disc brake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102889324A true CN102889324A (en) | 2013-01-23 |
| CN102889324B CN102889324B (en) | 2014-11-19 |
Family
ID=47532946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210402971.XA Expired - Fee Related CN102889324B (en) | 2012-10-18 | 2012-10-18 | Stationary disc of aircraft carbon brake disc brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102889324B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615479A (en) * | 2013-11-22 | 2014-03-05 | 西安航空制动科技有限公司 | Carbon brake disc assembly provided with isolation pads |
| CN103982578A (en) * | 2014-05-23 | 2014-08-13 | 西安航空制动科技有限公司 | Manufacturing method of carbon/carbon composite material brake disk friction pair for planes |
| CN111656041A (en) * | 2017-12-29 | 2020-09-11 | 福乐尼·乐姆宝公开有限公司 | Brake disc for disc brake and method |
| CN113218858A (en) * | 2021-05-12 | 2021-08-06 | 西安航空制动科技有限公司 | Method for evaluating friction coefficient of brake material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4585096A (en) * | 1984-08-03 | 1986-04-29 | The B. F. Goodrich Company | Brake apparatus |
| CN201003558Y (en) * | 2006-01-25 | 2008-01-09 | 王淑敏 | Undercarriage brake disc pair |
| CN102042356A (en) * | 2010-12-16 | 2011-05-04 | 西安航空制动科技有限公司 | Steel brake disc with stress release holes |
-
2012
- 2012-10-18 CN CN201210402971.XA patent/CN102889324B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4585096A (en) * | 1984-08-03 | 1986-04-29 | The B. F. Goodrich Company | Brake apparatus |
| CN201003558Y (en) * | 2006-01-25 | 2008-01-09 | 王淑敏 | Undercarriage brake disc pair |
| CN102042356A (en) * | 2010-12-16 | 2011-05-04 | 西安航空制动科技有限公司 | Steel brake disc with stress release holes |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615479A (en) * | 2013-11-22 | 2014-03-05 | 西安航空制动科技有限公司 | Carbon brake disc assembly provided with isolation pads |
| CN103982578A (en) * | 2014-05-23 | 2014-08-13 | 西安航空制动科技有限公司 | Manufacturing method of carbon/carbon composite material brake disk friction pair for planes |
| CN103982578B (en) * | 2014-05-23 | 2016-02-03 | 西安航空制动科技有限公司 | The preparation method of a kind of airplane carbon/carbon/carbon composite material brake disc friction pair |
| CN111656041A (en) * | 2017-12-29 | 2020-09-11 | 福乐尼·乐姆宝公开有限公司 | Brake disc for disc brake and method |
| CN113218858A (en) * | 2021-05-12 | 2021-08-06 | 西安航空制动科技有限公司 | Method for evaluating friction coefficient of brake material |
| CN113218858B (en) * | 2021-05-12 | 2023-02-10 | 西安航空制动科技有限公司 | Method for evaluating friction coefficient of brake material |
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| Publication number | Publication date |
|---|---|
| CN102889324B (en) | 2014-11-19 |
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