CN109305340B - Air cylinder seat damper for aircraft brake wheel - Google Patents
Air cylinder seat damper for aircraft brake wheel Download PDFInfo
- Publication number
- CN109305340B CN109305340B CN201811228682.6A CN201811228682A CN109305340B CN 109305340 B CN109305340 B CN 109305340B CN 201811228682 A CN201811228682 A CN 201811228682A CN 109305340 B CN109305340 B CN 109305340B
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- CN
- China
- Prior art keywords
- mounting hole
- valve core
- damper mounting
- cylinder seat
- damper
- Prior art date
- 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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Links
- 238000013016 damping Methods 0.000 claims abstract description 41
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 5
- 230000007704 transition Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 238000004904 shortening Methods 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C25/00—Alighting gear
- B64C25/32—Alighting gear characterised by elements which contact the ground or similar surface
- B64C25/42—Arrangement or adaptation of brakes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
- B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transportation (AREA)
- Fluid-Damping Devices (AREA)
Abstract
A cylinder seat damper for an aircraft brake wheel is provided, and a spring is arranged on the bottom surface of a damper mounting hole of the cylinder seat. The lower end of the valve core is arranged in the damper mounting hole, and the valve core is in sliding fit with the damper mounting hole. The valve core is provided with 3 damping holes with different diameters, and the valve core moves up and down in the cylinder seat by adjusting the screwing depth of the screw threads of the nut, so that the corresponding damping holes are communicated with the pipeline holes of the cylinder seat, and the aim of damping adjustment is fulfilled. The eccentric cam body of the valve core is in clearance fit with the cylinder seat mounting hole, so that the damper mounting hole is communicated with a cylinder seat pipeline, and the fluid in the valve core is prevented from being sealed. The invention overcomes the defect that the prior non-detachable cylinder seat damper structure widely used at home and abroad needs to process dampers and cylinder seats with different apertures to screen out proper dampers through experiments. Thereby realizing the purposes of shortening the development period and prolonging the development cost.
Description
Technical Field
The invention relates to the technical field of aviation machinery, in particular to a cylinder seat damper for an aircraft brake wheel.
Background
As shown in fig. 1-2, an aircraft brake wheel is generally comprised of a wheel assembly and a brake device. The brake device consists of a cylinder seat assembly, a brake disc assembly, a brake shell and other assemblies; the brake disc assembly is generally composed of a pressing disc, a movable disc, a static disc and a pressure-bearing disc. When the aircraft lands, the brake system acquires an output pressure signal through an aircraft brake command sensor (pedal). The pressure signal is converted into output pressure of the brake system and is input into a cylinder seat assembly, and the cylinder seat pushes a piston assembly arranged in the cylinder seat assembly to move so as to generate piston thrust; the thrust of the piston is applied to the steel pressure disc assembly and the aircraft is braked by the frictional resistance generated on the disc by the axial force acting on the disc. In the landing process of the aircraft, the brake system has an anti-skid function, so that the aircraft can be continuously pressurized and decompressed. Aircraft landing gear systems are complex, multiple degree of freedom dynamic systems that may produce vibration or dynamic response problems due to braking. According to the development experience of the brake devices of various models, the damping size of the damper is found to be matched with the brake device so as to effectively absorb the brake vibration energy.
The damper shown in fig. 1 is a non-detachable cylinder block damper structure widely used at home and abroad. The damper is mounted in the cylinder block 5 by an interference fit. When the cylinder seat damper is developed, dampers and cylinder seats with different apertures are required to be processed, and then the proper damper is screened out through a test, so that the development period is prolonged and the waste of cylinder seat components is large.
Disclosure of Invention
The invention provides an aircraft brake wheel cylinder seat damper, which aims to overcome the defects of long development period and large waste of cylinder seat components of the cylinder seat damper in the prior art.
The invention comprises a valve core, an adjusting nut, a spring and a sealing ring. The spring is arranged in the damper mounting hole of the cylinder seat, so that the bottom end surface of the spring is attached to the bottom surface of the damper mounting hole. The lower end of the valve core is arranged in the damper mounting hole, and the valve core is in sliding fit with the damper mounting hole. An adjusting nut is sleeved at the orifice of the damper mounting hole, and a compression bar in the adjusting nut is propped against the center of the upper end face of the valve core. When the adjusting nut is rotated, the valve core moves up and down under the action of the adjusting nut, so that each damping hole on the valve core corresponds to and penetrates through an oil circuit hole on the cylinder seat.
The valve core is cylindrical, and a radially protruding sliding block is arranged at the upper end of the valve core. The outer diameter of the sliding block is the same as the maximum aperture of a damper mounting hole on the cylinder seat, and the sliding block and the damper mounting hole are in clearance fit; the circumference surface of the round table is provided with a sealing groove for placing a sealing ring. The center of the upper end face of the round table is provided with a groove matched with a compression bar in the adjusting nut.
The lower end of the valve core is provided with a cam rod; the cam is formed by a radial arc-shaped protruding block on one side of the outer circumferential surface of the cam body, and two side edges of the protruding block are in smooth transition connection with the outer circumferential surface of the cam rod. The maximum radius r of the protruding part of the cam body is 1mm. The circle center o' of the valve core is not coaxial with the circle center o of the damper mounting hole, and the eccentricity between the two is 3.3mm.
Three radial damping holes are sequentially distributed on the cam rod of the valve core from top to bottom, namely a first damping hole with the aperture of 1.2mm, a second damping hole with the aperture of 1.6mm and a third damping hole with the aperture of 2mm, wherein the linear distance between the central line of the first damping hole and the lower end surface of the circular table is 3.6mm, and the linear distance between the central line of the third damping hole and the lower end surface of the circular table is 8mm; the center distance between every two adjacent damping holes is 4mm. The center line of each damping hole perpendicularly intersects with the center line of the valve core.
The diameter of the sliding block is 9.5mm, and the height of the sliding block is 2mm; the length of the cam rod is 19.6mm, and the diameter of the cam rod is 7.0mm.
The adjusting nut is a hollow revolving body, one end of the adjusting nut is closed, and the other end of the adjusting nut is open. The inner surface of the adjusting nut is a threaded surface matched with the outer surface of the damper mounting hole; the adjusting nut has an outer diameter smaller than an inner diameter of a damper mounting hole groove on the cylinder block. The center of the inner end surface of the closed end of the adjusting nut is provided with an axially extending compression bar. The length of the pressing rod is 8.3mm. The pitch of the screw thread of the adjusting nut is 1mm, and the diameter of the screw thread is 14mm.
A damper mounting hole which is communicated with a cylinder seat pipeline hole on the cylinder seat is processed on the cylinder seat, and the central line of the damper mounting hole is vertically intersected with the central line of the cylinder seat pipeline hole; and two ends of the cylinder seat pipeline hole are respectively communicated with a piston cavity. The inner surface of the damper mounting hole is provided with a limiting surface of the valve core; the vertical distance between the limiting surface and the orifice plane of the damper mounting hole is 10mm, and the vertical distance between the limiting surface and the central line of the pipeline hole of the cylinder seat is 8mm. The orifice plane of the damper mounting hole is lower than the upper surface of the cylinder seat, and the height difference is 1.3mm. An annular groove for installing an adjusting nut is formed in the upper surface of the cylinder seat. The annular groove has an axial depth of 13.3mm and surrounds the orifice of the damper mounting hole, so that the upper part of the damper mounting hole forms a shell shape; the orifice plane of the damper mounting hole is 12mm away from the bottom surface of the annular groove. The outer circumferential surface of the upper shell of the damper mounting hole is a threaded surface matched with the adjusting nut. The diameter of the cylinder seat pipeline hole is 4mm.
The valve core used in the invention is designed with 3 damping holes with different diameters, and the valve core moves up and down in the cylinder seat by adjusting the screwing depth of the screw threads of the nut, so that the corresponding damping holes are communicated with the pipeline holes of the cylinder seat, and the aim of adjusting the damping size is fulfilled. The eccentric cam body of the valve core is in clearance fit with the cylinder seat mounting hole, and the fit clearance is 0.05-0.1 mm, so that the damper mounting hole is communicated with a cylinder seat pipeline, and the fluid in the valve core is prevented from being sealed.
The invention can realize simple and convenient adjustment of the damping size by adjusting the damping hole communicated with the cylinder seat pipeline. The defect that the damper and the cylinder seat with different apertures need to be processed to screen out the proper damper through the test is avoided in the non-detachable cylinder seat damper structure widely used at home and abroad at present. Thereby realizing the purposes of shortening the development period and prolonging the development cost.
Drawings
FIG. 1 is a schematic installation view of a cylinder block damper for an aircraft brake wheel widely used at home and abroad at present;
FIG. 2 is a schematic diagram of the structure of the present invention;
FIG. 3 is a left side view of FIG. 2;
FIG. 4 is a schematic illustration of the mating of a valve cartridge with a cylinder block;
fig. 5 is a schematic cross-sectional view of the valve cartridge.
Wherein: 1. a valve core; 2. an adjusting nut; 3. a spring; 4. a seal ring; 5. a cylinder block; 6. a first damping hole; 7. a second damping hole; 8. a third damping hole; 9 limit surfaces; 10. cylinder block pipeline hole.
Detailed Description
The embodiment is a cylinder seat damper, which comprises a valve core 1, an adjusting nut 2, a spring 3 and a sealing ring 4. Wherein the spring 3 is installed in the damper mounting hole of the cylinder block 5 so that the bottom end surface of the spring is fitted to the bottom surface of the damper mounting hole. The lower end of the valve core 1 is arranged in the damper mounting hole, and the valve core is in sliding fit with the damper mounting hole. An adjusting nut 2 is sleeved at the orifice of the damper mounting hole, and a compression bar in the adjusting nut is propped against the center of the upper end face of the valve core. When the adjusting nut is rotated, the valve core moves up and down under the action of the adjusting nut, so that each damping hole on the valve core corresponds to and penetrates through an oil circuit hole on the cylinder seat 5.
The valve core 1 is cylindrical, the upper end of the valve core is provided with a radially protruding sliding block, the diameter of the sliding block is 9.5mm, and the height of the sliding block is 2mm. The outer diameter of the sliding block is the same as the maximum aperture of a damper mounting hole on the cylinder seat 5, and the sliding block and the damper mounting hole are in clearance fit; an annular sealing groove is formed on the circumferential surface of the slider for accommodating the sealing ring 4. The center of the upper end face of the round table is provided with a groove matched with a compression bar in the adjusting nut.
The lower end of the valve core 1 is provided with a cam rod; the length of the cam rod is 19.6mm, and the diameter is 7.0mm; the cam rod is characterized in that one side of the outer circumferential surface of the cam rod is provided with a radial arc-shaped protruding block, and two side edges of the protruding block are in smooth transition connection with the outer circumferential surface of the cam rod to form a cam. The maximum radius r of the cam lever projection is 0.7mm. The circle center o' of the valve core is not coaxial with the circle center o of the damper mounting hole, and the eccentricity between the two is 3.3mm.
Three radial damping holes are sequentially distributed on a cam rod of the valve core from top to bottom, namely a first damping hole 6 with the aperture of 1.2mm, a second damping hole 7 with the aperture of 1.6mm and a third damping hole 8 with the aperture of 2mm, wherein the linear distance between the central line of the first damping hole and the lower end surface of the circular table is 3.6mm, and the linear distance between the central line of the third damping hole and the lower end surface of the circular table is 8mm; the center distance between adjacent damping holes is 4mm. The center line of each damping hole perpendicularly intersects with the center line of the valve core.
The adjusting nut is a hollow revolving body, one end of the adjusting nut is closed, and the other end of the adjusting nut is open. The inner surface of the adjusting nut is a threaded surface matched with the outer surface of the damper mounting hole; the adjusting nut has an outer diameter smaller than an inner diameter of a damper mounting hole groove on the cylinder block. The center of the inner end surface of the closed end of the adjusting nut is provided with an axially extending compression bar. The length of the pressing rod is 8.3mm. The pitch of the threads of the adjusting nut 2 is 1mm, and the diameter of the threads is 14mm.
The cylinder block 5 is an improvement over the prior art. The improvement is that a damper mounting hole which is communicated with a cylinder seat pipeline hole 10 on the cylinder seat is processed on the cylinder seat, and the central line of the damper mounting hole is vertically intersected with the central line of the cylinder seat pipeline hole 10; the two ends of the cylinder seat pipeline hole 10 are respectively communicated with a piston cavity.
The inner surface of the damper mounting hole is a stepped surface with a large upper part and a small lower part, and the end surface of the stepped part forms a limit surface 9 of the valve core; the vertical distance between the limiting surface and the orifice plane of the damper mounting hole is 10mm, and the vertical distance between the limiting surface and the central line of the cylinder seat pipeline hole 10 is 8mm. The orifice plane of the damper mounting hole is lower than the upper surface of the cylinder seat, and the height difference is 1.3mm. An annular groove for installing an adjusting nut is formed in the upper surface of the cylinder seat. The annular groove has an axial depth of 13.3mm and surrounds the orifice of the damper mounting hole, so that the upper part of the damper mounting hole forms a shell shape; the orifice plane of the damper mounting hole is 12mm away from the bottom surface of the annular groove. The outer circumferential surface of the upper shell of the damper mounting hole is a threaded surface matched with the adjusting nut.
In this embodiment, the diameter of the cylinder block pipe hole is 4mm. The valve core is sealed with the inner surface of the damper mounting hole through a sealing ring 4. The lower end of a compression bar in the middle of the adjusting nut 2 is contacted with a groove at the top of the valve core 1, when the adjusting nut 2 is rotated to press the valve core to move downwards until the lower surface of a boss at the upper end of the valve core is attached to the upper surface of a limit table of the valve core, a third damping hole is communicated with a cylinder seat pipeline hole of the cylinder seat 5; when the rotary adjusting nut moves upwards by 4mm, the valve core also moves upwards by 4mm under the action of the spring, so that the second damping hole is communicated with the oil circuit hole of the cylinder seat 5; when the adjusting nut is continuously rotated to move upwards by 4mm, the valve core also moves upwards by 4mm under the action of the spring, so that the first damping hole is communicated with the oil circuit hole of the cylinder seat 5.
Claims (6)
1. The air cylinder seat damper for the aircraft brake wheel is characterized by comprising a valve core, an adjusting nut, a spring and a sealing ring; the spring is arranged in the damper mounting hole of the cylinder seat, so that the bottom end surface of the spring is attached to the bottom surface of the damper mounting hole; the lower end of the valve core is arranged in the damper mounting hole, and the valve core is in sliding fit with the damper mounting hole; an adjusting nut is sleeved at the orifice of the damper mounting hole, and a compression bar in the adjusting nut is propped against the center of the upper end face of the valve core; when the adjusting nut is rotated, the valve core moves up and down under the action of the adjusting nut, so that each damping hole on the valve core corresponds to and is communicated with an oil circuit hole on the cylinder seat;
the valve core is cylindrical, and a sliding block protruding radially is arranged at the upper end of the valve core; the outer diameter of the sliding block is the same as the maximum aperture of a damper mounting hole on the cylinder seat, and the sliding block and the damper mounting hole are in clearance fit; the circumference surface of the sliding block is provided with a sealing groove for placing a sealing ring; a groove matched with a compression bar in the adjusting nut is arranged in the center of the upper end face of the sliding block;
the lower end of the valve core is provided with a cam rod; a radial arc-shaped protruding block is arranged on one side of the outer circumferential surface of the cam rod, and two side edges of the protruding block are in smooth transition connection with the outer circumferential surface of the cam rod to form a cam; the maximum radius r of the cam lever convex part is 1mm; the center o' of the cross section of the lower end of the valve core is different from the center o of the cross section of the upper end of the damper mounting hole, and the eccentricity between the center o and the center o is 3.3mm.
2. The aircraft brake wheel cylinder block damper according to claim 1, wherein three radial damping holes are sequentially distributed on the cam rod of the valve core from top to bottom, namely a first damping hole with the aperture of 1.2mm, a second damping hole with the aperture of 1.6mm and a third damping hole with the aperture of 2mm, wherein the linear distance between the central line of the first damping hole and the lower end surface of the sliding block is 3.6mm, and the linear distance between the central line of the third damping hole and the lower end surface of the sliding block is 8mm; the center line of each damping hole perpendicularly intersects with the center line of the valve core.
3. The aircraft brake wheel cylinder block damper of claim 1, wherein the slider has a diameter of 9.5mm and a height of 2mm; the length of the cam rod is 19.6mm, and the diameter of the cam rod is 7.0mm.
4. The aircraft brake wheel cylinder block damper of claim 1, wherein the adjusting nut is a hollow revolution body, and one end of the adjusting nut is closed and the other end is open; the inner surface of the adjusting nut is a threaded surface matched with the outer surface of the damper mounting hole; a compression bar extending axially is arranged in the center of the inner end surface of the closed end of the adjusting nut; the length of the pressing rod is 8.3mm; the pitch of the threads of the adjusting nut is 1mm, and the diameter of the threads is 14mm.
5. The aircraft brake wheel cylinder block damper according to claim 1, wherein a damper mounting hole penetrating a cylinder block pipe hole on the cylinder block is formed in the cylinder block, and a center line of the damper mounting hole perpendicularly intersects a center line of the cylinder block pipe hole; two ends of the cylinder seat pipeline hole are respectively communicated with a piston cavity; the inner surface of the damper mounting hole is provided with a limiting surface of the valve core; the vertical distance between the limiting surface and the orifice plane of the damper mounting hole is 10mm, and the vertical distance between the limiting surface and the central line of the pipeline hole of the cylinder seat is 8mm; the orifice plane of the damper mounting hole is lower than the upper surface of the cylinder seat, and the formed height difference is 1.3mm; an annular groove for installing an adjusting nut is processed on the upper surface of the cylinder seat; the annular groove has an axial depth of 13.3mm and surrounds the orifice of the damper mounting hole, so that the upper part of the damper mounting hole forms a shell shape; the orifice plane of the damper mounting hole is 12mm away from the bottom surface of the annular groove; the outer circumferential surface of the upper shell of the damper mounting hole is a threaded surface matched with the adjusting nut.
6. The aircraft brake wheel cylinder block damper of claim 5, wherein the cylinder block tube opening has a diameter of 4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811228682.6A CN109305340B (en) | 2018-10-22 | 2018-10-22 | Air cylinder seat damper for aircraft brake wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811228682.6A CN109305340B (en) | 2018-10-22 | 2018-10-22 | Air cylinder seat damper for aircraft brake wheel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109305340A CN109305340A (en) | 2019-02-05 |
| CN109305340B true CN109305340B (en) | 2023-12-29 |
Family
ID=65225374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811228682.6A Active CN109305340B (en) | 2018-10-22 | 2018-10-22 | Air cylinder seat damper for aircraft brake wheel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109305340B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4993781A (en) * | 1989-09-21 | 1991-02-19 | The Boeing Company | Antijam brake-metering valve and method for its use |
| CN201723635U (en) * | 2010-06-30 | 2011-01-26 | 芜湖天佑汽车技术有限公司 | Damping adjustable shock absorber |
| CN201723756U (en) * | 2010-06-30 | 2011-01-26 | 芜湖天佑汽车技术有限公司 | Flow control electromagnetic valve |
| KR20130053595A (en) * | 2011-11-15 | 2013-05-24 | 주식회사 만도 | Valve structure for damper |
| CN206036261U (en) * | 2016-08-23 | 2017-03-22 | 龙圆环保科技（上海）有限公司 | Controllable valve of flow |
| CN108457921A (en) * | 2017-02-21 | 2018-08-28 | 波音公司 | Shuttle valve with damping |
| KR20180098726A (en) * | 2017-02-27 | 2018-09-05 | 에스앤티모티브 주식회사 | Electronically controlled damping force variable damper |
| CN209192210U (en) * | 2018-10-22 | 2019-08-02 | 西安航空制动科技有限公司 | Aircraft braking wheel cylinder seat damper |
-
2018
- 2018-10-22 CN CN201811228682.6A patent/CN109305340B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4993781A (en) * | 1989-09-21 | 1991-02-19 | The Boeing Company | Antijam brake-metering valve and method for its use |
| CN201723635U (en) * | 2010-06-30 | 2011-01-26 | 芜湖天佑汽车技术有限公司 | Damping adjustable shock absorber |
| CN201723756U (en) * | 2010-06-30 | 2011-01-26 | 芜湖天佑汽车技术有限公司 | Flow control electromagnetic valve |
| KR20130053595A (en) * | 2011-11-15 | 2013-05-24 | 주식회사 만도 | Valve structure for damper |
| CN206036261U (en) * | 2016-08-23 | 2017-03-22 | 龙圆环保科技（上海）有限公司 | Controllable valve of flow |
| CN108457921A (en) * | 2017-02-21 | 2018-08-28 | 波音公司 | Shuttle valve with damping |
| KR20180098726A (en) * | 2017-02-27 | 2018-09-05 | 에스앤티모티브 주식회사 | Electronically controlled damping force variable damper |
| CN209192210U (en) * | 2018-10-22 | 2019-08-02 | 西安航空制动科技有限公司 | Aircraft braking wheel cylinder seat damper |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109305340A (en) | 2019-02-05 |
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