A kind of machine wheel brake device running-in and test equipment

Abstract

The present application belongs to the airborne wheel brake device debugging before installation, and particularly relates to a kind of wheel brake device running-in and testing equipment. Including: chassis, adjustable speed motor, transmission motor case, transmission wheel, belt, process wheel, switching support, cooling device, control cabinet, hydraulic oil tank, static torque measuring arm, wherein, adjustable speed motor is installed on the chassis, adjustable speed motor output end is connected with transmission motor case, transmission motor case transmits power to both sides transmission wheel, and process wheel is driven to rotate by belt;Switching support is fixed on the chassis by bolt, switching support top is fixed with the wheel brake device to be run-in by bolt, and brake disc is run-in by process wheel, switching support internal horizontal fixed axle, and process wheel is fixed on axle by bolt.

Description

Technical Field

[0001] This invention pertains to the pre-installation debugging of airborne wheel brake devices, specifically involving a break-in and testing device for wheel brake devices. Background Technology

[0002] All aircraft wheeled main landing gears are equipped with wheel brakes. An auxiliary hydraulic system pressurizes the wheel brakes via brake distribution valves to achieve wheel braking, enabling functions such as taxiing, turning, and braking during stops. According to the technical requirements of each aircraft model, the wheel brakes must achieve a certain braking static torque under rated input pressure to ensure braking performance. However, the brake pads and discs on new wheel brakes have not undergone proper break-in, resulting in low friction and an inability to achieve the required braking static torque under rated input pressure. To ensure the brakes perform as required after installation, the brake discs and brake pads must undergo appropriate break-in and testing. Summary of the Invention

[0003] Purpose of the invention: To provide a break-in and testing device for a wheel brake device, used for breaking in the brake pads and brake discs in the wheel brake device, and to test whether the wheel brake device achieves the required braking static torque under the input rated hydraulic pressure.

[0004] The technical solution of the present invention:

[0005] A break-in and testing device for a wheel brake system includes: a base frame 10, an adjustable speed motor 6, a transmission housing 5, a transmission wheel 9, a belt 4, a process wheel 3, a transition support 11, a cooling device 2, a control cabinet 7, a hydraulic oil tank 8, and a static torque measuring arm 204.

[0006] Among them, the adjustable speed motor 6 is mounted on the base frame 10, and the output end of the adjustable speed motor 6 is connected to the transmission housing 5. The transmission housing 5 transmits power to the transmission wheels 9 on both sides, and drives the process wheel 3 to rotate through the belt 4.

[0007] The adapter support 11 is fixed to the base frame 10 by bolts 301. The machine wheel brake device 303 to be run-in is fixed to the top of the adapter support 11 by bolts 304. The brake disc 305 is run-in by the process wheel 3. The wheel axle 302 is fixed laterally inside the adapter support 11. The process wheel 3 is fixed to the wheel axle by bolts 309.

[0008] Furthermore, it also includes: the process wheel 3 includes a wheel body 307, a bearing 308, a transmission cover 306 and a bushing 310. The wheel body 307 has bolt holes for mounting the static torque measuring arm 204. The transmission cover 306 can engage the brake disc 305 in the machine wheel brake device and drive it to rotate around the wheel axle 302. The outer ring of the bearing 308 is connected to the wheel body 307, and the inner ring of the bearing 308 is connected to the bushing 310.

[0009] Furthermore, the cooling device 2 consists of a fan 101, an air duct 102, and a temperature sensor 103. The temperature sensor 103 is placed inside the adapter support 11. A semiconductor cooling chip is installed on the inner wall of the air duct 102, and the end opening faces the brake device. The control switch of the cooling device 2 is installed on the control cabinet 7. The fan 101 is located at one end of the air duct 102.

[0010] Furthermore, the static torque measuring arm 204 is mounted on the process wheel 3 by bolts 205, extending radially outward from the center of the wheel axle to form a lever arm with a length of 1 meter.

[0011] Furthermore, the outer end of the static torque measuring arm 204 is connected to a steel cable 203, and a force gauge 202 is installed on the steel cable 203 to measure the tension of the steel cable 203. The other end of the steel cable 203 is connected to the anti-reverse ratchet 12.

[0012] Furthermore, the anti-reverse ratchet 12 is fixed to the edge of the base frame 10, and the steel cable 203 is tightened by unidirectional rotation of the detachable crank handle 201. The protective frame 1 is fixed to the base frame 1 at the lower end of the static torque measuring arm 204.

[0013] Furthermore, it also includes: a hydraulic system, which includes a hydraulic oil tank 8, a suction filter 401, an electric pump 402, an electric pump check valve 403, an accumulator 404, an electric pump control pressure relay 405, a supply filter 406, a booster check valve 407, an adjustable pressure reducing valve 408, a hydraulic solenoid valve 409, an output pressure relay 410, a pressure gauge 411, a wheel brake device booster pipe 412, a flow limiting valve 413, a safety valve 414, a return filter 415, and a return safety valve 416. All components are connected by pipelines.

[0014] The inlet of the electric pump 402 is connected to the hydraulic oil tank 8 through the suction filter 401; the outlet of the electric pump 402 is connected to the accumulator 404 through the electric pump check valve 403; the outlet of the accumulator 404 is connected to one pressure input port of the hydraulic solenoid valve 409 after passing through the electric pump control pressure relay 405, the supply filter 406, the booster check valve 407, and the adjustable pressure reducing valve 408; one pressure output port of the hydraulic solenoid valve 409 is connected to the booster pipe 412 of the wheel brake device after passing through the output pressure relay 410, the pressure gauge 411, and the flow limiting valve 413; the return port of the hydraulic solenoid valve 409 is connected to the hydraulic oil tank 8 through the return filter 415 and the return safety valve 416, one end of the safety valve 414 is connected to the accumulator 404, and the other end of the safety valve 414 is connected to the return filter 415.

[0015] Furthermore, the hydraulic oil tank 8 is fixed on the base frame 10, the wheel brake device pressurization pipe 412 is laid on the base frame 10 and connected to the wheel brake device 303 to pressurize the wheel brake device 303, and the remaining hydraulic system components and related pipelines are installed in the control cabinet 7 fixed on the base frame 10.

[0016] Furthermore, to accommodate different models of wheel brake devices, the wheel axle 302 and the adapter support 11 are available in various specifications and can be replaced.

[0017] Furthermore, to cope with emergencies, an emergency stop button is installed in control cabinet 10.

[0018] The beneficial effects of this application are as follows:

[0019] This equipment can be used to break in brake pads and brake discs for various types of aircraft wheel brake devices, and can also test the static torque of the brakes. The heavy on-board testing work can be carried out on this equipment in advance. The break-in work can be automatically controlled by the equipment, without the need for personnel to be on duty or to lift the aircraft, which effectively simplifies the operation and improves work efficiency. Attached Figure Description

[0020] Figure 1 This is an overall view of a wheel brake device break-in and testing equipment according to an embodiment of the present invention;

[0021] Figure 2 This is a front view of the break-in state of a wheel brake device and a testing device according to an embodiment of the present invention.

[0022] Figure 3 This is a front view of the test state of a wheel brake device break-in and testing equipment according to an embodiment of the present invention.

[0023] Figure 4 This is a sectional view along line AA in the main view of a running-in and testing device for a wheel brake device according to an embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of the hydraulic system of a wheel brake device break-in and testing equipment according to an embodiment of the present invention.

[0025] The components include: 1. Protective frame; 2. Cooling device; 3. Process wheel; 4. Belt; 5. Transmission housing; 6. Adjustable speed motor; 7. Control cabinet; 8. Hydraulic oil tank; 9. Transmission wheel; 10. Base frame; 11. Adapter support; 12. Anti-reverse ratchet; 101. Fan; 102. Air duct; 103. Temperature sensor; 201. Detachable crank handle; 202. Force gauge; 203. Steel cable; 204. Static torque measuring arm; 205. Bolt; 301. Axle; 302. Braking device; 303. Bolt; 304. Brake disc; 305. Transmission wheel. 306. Shielding shroud 307. Wheel body 307. Bearing 308. Bolt 309. Bushing 310. Suction filter 401. Electric pump 402. Electric pump check valve 403. Accumulator 404. Electric pump control pressure relay 405. Supply filter 406. Pressure boosting check valve 407. Adjustable pressure reducing valve 408. Hydraulic solenoid valve 409. Output pressure relay 410. Pressure gauge 411. Wheel brake device pressure boosting pipe 412. Flow limiting valve 413. Safety valve 414. Return filter 415. Return safety valve 416. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0027] In the description of this invention, it should be understood that the terms "center", "axial", "vertical", "upper", "lower", "upper end", "bottom end", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0028] The present application will be further described in detail below with reference to the accompanying drawings of the embodiments.

[0029] like Figure 1-5 A break-in and testing device for a wheel brake system includes: a base frame 10, an adjustable speed motor 6, a transmission housing 5, a transmission wheel 9, a belt 4, a process wheel 3, a transition support 11, a cooling device 2, a control cabinet 7, a hydraulic oil tank 8, and a static torque measuring arm 204.

[0030] Among them, the adjustable speed motor 6 is mounted on the base frame 10, and the output end of the adjustable speed motor 6 is connected to the transmission housing 5. The transmission housing 5 transmits power to the transmission wheels 9 on both sides, and drives the process wheel 3 to rotate through the belt 4.

[0031] The adapter support 11 is fixed to the base frame 10 by bolts 301. The machine wheel brake device 303 to be run-in is fixed to the top of the adapter support 11 by bolts 304. The brake disc 305 is run-in by the process wheel 3. The wheel axle 302 is fixed laterally inside the adapter support 11. The process wheel 3 is fixed to the wheel axle by bolts 309.

[0032] Furthermore, it also includes: the process wheel 3 includes a wheel body 307, a bearing 308, a transmission cover 306 and a bushing 310. The wheel body 307 has bolt holes for mounting the static torque measuring arm 204. The transmission cover 306 can engage the brake disc 305 in the machine wheel brake device and drive it to rotate around the wheel axle 302. The outer ring of the bearing 308 is connected to the wheel body 307, and the inner ring of the bearing 308 is connected to the bushing 310.

[0033] Furthermore, the cooling device 2 consists of a fan 101, an air duct 102, and a temperature sensor 103. The temperature sensor 103 is placed inside the adapter support 11. A semiconductor cooling chip is installed on the inner wall of the air duct 102, and the end opening faces the brake device. The control switch of the cooling device 2 is installed on the control cabinet 7. The fan 101 is located at one end of the air duct 102.

[0034] Furthermore, the static torque measuring arm 204 is mounted on the process wheel 3 by bolts 205, extending radially outward from the center of the wheel axle to form a lever arm with a length of 1 meter.

[0035] Furthermore, the outer end of the static torque measuring arm 204 is connected to a steel cable 203, and a force gauge 202 is installed on the steel cable 203 to measure the tension of the steel cable 203. The other end of the steel cable 203 is connected to the anti-reverse ratchet 12.

[0036] Furthermore, the anti-reverse ratchet 12 is fixed to the edge of the base frame 10, and the steel cable 203 is tightened by unidirectional rotation of the detachable crank handle 201. The protective frame 1 is fixed to the base frame 1 at the lower end of the static torque measuring arm 204.

[0037] Furthermore, it also includes: a hydraulic system, which includes a hydraulic oil tank 8, a suction filter 401, an electric pump 402, an electric pump check valve 403, an accumulator 404, an electric pump control pressure relay 405, a supply filter 406, a booster check valve 407, an adjustable pressure reducing valve 408, a hydraulic solenoid valve 409, an output pressure relay 410, a pressure gauge 411, a wheel brake device booster pipe 412, a flow limiting valve 413, a safety valve 414, a return filter 415, and a return safety valve 416. All components are connected by pipelines.

[0038] The inlet of the electric pump 402 is connected to the hydraulic oil tank 8 through the suction filter 401; the outlet of the electric pump 402 is connected to the accumulator 404 through the electric pump check valve 403; the outlet of the accumulator 404 is connected to one pressure input port of the hydraulic solenoid valve 409 after passing through the electric pump control pressure relay 405, the supply filter 406, the booster check valve 407, and the adjustable pressure reducing valve 408; one pressure output port of the hydraulic solenoid valve 409 is connected to the booster pipe 412 of the wheel brake device after passing through the output pressure relay 410, the pressure gauge 411, and the flow limiting valve 413; the return port of the hydraulic solenoid valve 409 is connected to the hydraulic oil tank 8 through the return filter 415 and the return safety valve 416, one end of the safety valve 414 is connected to the accumulator 404, and the other end of the safety valve 414 is connected to the return filter 415.

[0039] Furthermore, the hydraulic oil tank 8 is fixed on the base frame 10, the wheel brake device pressurization pipe 412 is laid on the base frame 10 and connected to the wheel brake device 303 to pressurize the wheel brake device 303, and the remaining hydraulic system components and related pipelines are installed in the control cabinet 7 fixed on the base frame 10.

[0040] Furthermore, to accommodate different models of wheel brake devices, the wheel axle 302 and the adapter support 11 are available in various specifications and can be replaced.

[0041] Furthermore, to cope with emergencies, an emergency stop button is installed in control cabinet 10.

[0042] The break-in process using the aforementioned wheel brake device break-in and testing equipment is as follows:

[0043] This invention is equipped with an adjustable speed motor 6, whose switch and speed controller are installed in the control cabinet 7. The motor 6 needs to rotate during the break-in process of the machine wheel brake device 303. The process wheels 3 on both sides are rotated simultaneously through the transmission housing 5 and the belt 4. The process wheels 3 are fixed to the wheel axle 3 by bolts 309 and rotate through the internal bearing 308, which in turn drives the transmission cover 306 and the brake disc 305 meshing with it to rotate. When the brake device 303 is not pressurized, the brake disc 305 can rotate in the gap in the brake block of the brake device 303. When the brake device 303 is pressurized, the brake block is tightened, the gap disappears, and the brake block contacts and rubs against the brake disc 305, which slows down the rotation of the process wheel 3 until it stops.

[0044] The hydraulic system provides the required pressure to the wheel brake device 303. The electric pump 402 draws oil from the hydraulic oil tank 8 through the suction filter 401 and pressurizes it. It then pressurizes the accumulator 404 through the check valve 403. The electric pump 402 operates intermittently, and its start and stop are controlled by the electric pump control pressure relay 405. Pressure exceeding the system's safety load is released by the safety valve 414. The accumulator 404 pressurizes the adjustable pressure reducing valve 408 through the supply filter 406 and the pressure boosting check valve 407. The adjustable pressure reducing valve 408 reduces the system pressure to the rated working pressure of the wheel brake device 303 before outputting to the hydraulic solenoid valve 409. The hydraulic solenoid valve 409 is normally in the pressure relief position; when energized, the valve core moves to the right into the pressure boosting position. During the break-in process of the wheel brake device 303, the hydraulic solenoid valve 409 is controlled by the output pressure relay 410. During the break-in process, the deceleration is carried out while the wheel is rotating. Therefore, the output pressure relay 410 is adjustable and the maximum pressure trigger value is 0.5 MPa. The set pressure value must ensure that the process wheel 3 only decelerates but does not stop rotating. After reaching the deceleration pressure, the output pressure relay 410 is triggered and controls the hydraulic solenoid valve 409 to move to the left into the pressure relief position. This cycle repeats. The pressure gauge 411 is used to observe the pressure of the wheel brake device 303. The flow limiting valve 413 is used to slow down the hydraulic oil flow rate, thereby prolonging the response time of the output pressure relay 410. The system pressure is connected to the wheel brake device 303 through the wheel brake device pressure boosting pipe 412. The return oil after the system and brake device 303 are depressurized returns to the hydraulic oil tank 8 through the return oil filter 415. If the return oil filter 415 is blocked, it returns to the hydraulic oil tank 8 through the return oil safety valve 416.

[0045] Because a lot of heat is generated during the brake break-in process, which affects the break-in effect, the brake disc 305 and brake device 303 need to be cooled. The cooling device 2 has two modes of operation: manual and automatic. It can be selected by the switch installed in the control cabinet 7. In automatic mode, the cooling device is controlled by the temperature sensor 103 and turns on when the temperature reaches 60°.

[0046] The testing process using the aforementioned wheel brake device break-in and testing equipment is as follows:

[0047] During brake static torque measurement, the function selection switch on control cabinet 7 is switched from the break-in position to the test position. Motor 6 is de-energized, and hydraulic solenoid valve 409 remains in the boost position, continuously supplying rated pressure to the wheel brake device 303, engaging the brake disc 305, thus preventing the process wheel 3 from rotating. A static torque measuring arm 204 is installed on the process wheel 3. For convenient torque value calculation, the arm length of the static torque measuring arm 204 is 1 meter. The end of the static torque measuring arm 204 is connected to a force gauge 202 via a steel cable 203 and tightened by an anti-reverse ratchet 12 until the tension meets the technical requirements. If it can be maintained, a holding test is performed. If the required data is not met, the break-in process is repeated until it can be maintained. The protective frame 1 is used to prevent the static torque measuring arm 204 from falling and damaging the equipment after a loss of force.

[0048] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A device for the break-in and testing of a wheel brake system, characterized in that, include: Base frame, adjustable speed motor, transmission housing, transmission pulley, belt, process wheel, adapter support, cooling device, control cabinet, hydraulic oil tank, static torque measuring arm. The adjustable speed motor is mounted on the base frame. The output end of the adjustable speed motor is connected to the transmission housing. The transmission housing transmits power to the transmission wheels on both sides, which drive the process wheels to rotate via belts. The adapter support is fixed to the base frame with bolts. The brake device of the machine wheel to be run-in is fixed to the top of the adapter support with bolts. The brake disc is run-in by the process wheel. The wheel axle is fixed laterally inside the adapter support. The process wheel is fixed to the wheel axle with bolts.

2. The wheel brake device break-in and testing equipment according to claim 1, characterized in that, Also includes: The process wheel includes a wheel body, bearings, a transmission cover, and a bushing. The wheel body has bolt holes for mounting a static torque measuring arm. The transmission cover can engage the brake disc in the machine wheel brake device and drive it to rotate around the wheel axle. The relative position of the brake disc and the brake device simulates the installation state on the machine. The outer ring of the bearing is connected to the wheel body, and the inner ring of the bearing is connected to the bushing.

3. The wheel brake device break-in and testing equipment according to claim 2, characterized in that, The cooling device consists of a fan, an air duct, and a temperature sensor. The temperature sensor is placed inside the adapter bracket. A semiconductor cooling chip is installed on the inner wall of the air duct, and the end opening faces the braking device. The control switch of the cooling device is installed on the control cabinet. The fan is located at one end of the air duct.

4. The wheel brake device break-in and testing equipment according to claim 3, characterized in that, The static torque measuring arm is bolted to the process wheel, extending radially outward from the center of the wheel axle to form a lever arm with a length of 1 meter.

5. The wheel brake device break-in and testing equipment according to claim 4, characterized in that, The outer end of the static moment measuring arm is connected to a steel cable, on which a force gauge is installed to measure the tension of the steel cable. The other end of the steel cable is connected to an anti-reverse ratchet.

6. The wheel brake device break-in and testing equipment according to claim 5, characterized in that, The anti-reverse ratchet is fixed to the edge of the base frame. The steel cable is tightened by rotating the detachable crank handle in one direction. The protective frame is fixed to the base frame below the outer end of the static torque measuring arm.

7. The wheel brake device break-in and testing equipment according to claim 6, characterized in that, Also includes: The hydraulic system includes a hydraulic oil tank, suction filter, electric pump, electric pump check valve, accumulator, electric pump control pressure relay, supply filter, booster check valve, adjustable pressure reducing valve, hydraulic solenoid valve, output pressure relay, pressure gauge, wheel brake device booster pipe, flow limiting valve, safety valve, return filter and return safety valve. All components are connected by pipelines. The inlet of the electric pump is connected to the hydraulic oil tank via a suction filter; the outlet of the electric pump is connected to the accumulator via a check valve; the outlet of the accumulator is connected to one pressure input port of the hydraulic solenoid valve via an electric pump control pressure relay, a supply filter, a booster check valve, and an adjustable pressure reducing valve; one pressure output port of the hydraulic solenoid valve is connected to the booster pipe of the wheel brake device via an output pressure relay, a pressure gauge, and a flow limiting valve; the return port of the hydraulic solenoid valve is connected to the hydraulic oil tank via a return filter and a return safety valve, with one end of the safety valve connected to the accumulator and the other end connected to the return filter.

8. The wheel brake device break-in and testing equipment according to claim 7, characterized in that, The hydraulic oil tank is fixed on the base frame. The pressurization pipe of the wheel brake device is laid on the base frame and connected to the wheel brake device to pressurize the wheel brake device. The remaining hydraulic system components and related pipelines are installed in the control cabinet fixed on the base frame.

9. The wheel brake device break-in and testing equipment according to claim 8, characterized in that, To accommodate different models of wheel brake devices, the wheel axle and adapter support are available in various specifications and can be interchanged.

10. The wheel brake device break-in and testing equipment according to claim 9, characterized in that, To cope with emergencies, an emergency stop button is installed in the control cabinet.

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