Brake system pollutant recoil verification test bed
By designing a test bench for verifying the backlash of contaminants in the braking system, the problem of simulating backlash of contaminants in existing technologies has been solved, enabling effective simulation and fault prevention of the braking system and ensuring flight safety.
Patent Information
- Application Number
- CN202422972227.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-03
AI Technical Summary
Existing technologies cannot effectively simulate the backlash of contaminants in braking devices, making the braking control system susceptible to contamination and affecting flight safety.
Design a test bench for verifying contaminant backflow in a braking system, including a local hydraulic energy source, an energy control component, a braking component, and a power component. Simulate contaminant backflow in the braking device through an oil sampling port and a servo valve control component to perform effective contaminant analysis.
It can accurately simulate the backlash of contaminants in the braking system, providing a basis for improving aircraft design, avoiding faults such as mechanical noise, temperature drift, residual pressure, and brake lock-up, and ensuring flight safety.
Smart Images
Figure CN223637111U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of brake system test, and particularly relates to a brake system pollutant backflush verification test bench. BACKGROUND
[0002] The aircraft brake control system is an important component of the aircraft airborne system, and its function is to fully utilize the frictional resistance provided by the ground to the wheel, to safely, reliably and quickly realize the braking and control of the aircraft during take-off, landing, taxiing and turning, and its performance directly affects the rapid response, safe return and sustained combat capability of the aircraft, and further affects the overall performance of the aircraft. In order to improve the anti-skid performance of the system, the brake control system adopts electro-hydraulic control, digital anti-skid control and hydraulic servo actuation. The brake control system uses hydraulic servo actuation, and in the use process, due to the foreign matter, hydraulic system pollution and the like, the brake control system is easily polluted, and after being polluted, the brake response of the system is abnormal, which easily leads to tire burst of the wheel and affects the flight safety. A possible source of the pollution is that the brake device backflushes into the servo valve. The main servo valve design units are now researching jet pipe valves or jet deflection plate valves, and the main advantage of these valves is strong anti-pollution capability, but whether the anti-pollution capability of these valves in the system really reaches the design assumption needs to be evaluated. The brake servo valve is a core executive component of the system, and belongs to a high-precision hydraulic accessory. Whether the protection of the brake servo valve is good or not has a great influence on the reliability of the system and the safety of the take-off and landing of the aircraft.
[0003] In recent years, the brake systems of various types of aircraft often appear mechanical brittle response, temperature drift, excess pressure, brake lock, tire dragging and the like due to foreign matter, hydraulic system pollution and the like, which seriously affects the flight safety. Therefore, it is necessary to study the brake pollution backflush. According to the on-board pipeline design scheme of the brake system of the previous aircraft model, the brake pollution backflush test is performed. In order to ensure the reliability of the test results, the test bench needs to be specially designed to be consistent with the actual use on board. SUMMARY
[0004] The application aims to provide a brake system pollutant backflush verification test bench, so as to solve the problem that the brake device pollution backflush condition is difficult to be effectively simulated in the prior art.
[0005] The technical scheme of the present application is: a brake system pollutant backflush verification test bench, comprising a local hydraulic power source, an energy control component, a brake component and a power component; an oil sampling port is arranged on the local hydraulic power source and the hydraulic pipeline connected thereto; the energy control component is connected to the local hydraulic power source through a cable and is used for controlling the start and stop of the local hydraulic power source; the brake component comprises a brake servo valve and a servo valve control component; the oil inlet of the brake servo valve is connected to the oil supply port of the local hydraulic power source, the oil return port is connected to the oil return port of the local hydraulic power source, and the working port is connected to the brake device on the brake wheel; the servo valve control component is connected to the brake servo valve through a cable and is used for outputting a control current to the brake servo valve; the power component comprises a swing mechanism and a cylinder; the lower end of the swing mechanism is connected to the brake wheel, and the upper end is connected to a movable bench; a connecting rod is integrally arranged in the middle part of the swing mechanism; the lower end of the cylinder is hinged to the connecting rod of the swing mechanism, and the upper end is hinged to the movable bench, and is used for outputting a driving force for the up-down movement of the brake mechanism.
[0006] Preferably, the brake servo valve and the brake wheel are connected through a brake pipeline, the upper end and the lower end of the brake pipeline are provided with a first working oil sampling port, and a manual shut-off valve is arranged on the first working oil sampling port, so as to realize the opening and closing control of the working oil sampling port.
[0007] Preferably, the brake servo valve and the oil return port of the local hydraulic power source are connected through a return oil pipeline, a return oil sampling port is arranged on the return oil pipeline and the return oil port outlet of the brake servo valve, and a manual shut-off valve is arranged on the return oil sampling port.
[0008] Preferably, the brake servo valve and the brake wheel are connected through a brake pipeline, a second working oil sampling port is arranged at the working port outlet of the brake servo valve, the middle section of the brake pipeline and the inlet of the brake device hydraulic nozzle.
[0009] Preferably, a vertical bearing with seat is arranged above the swing mechanism, and when the piston rod of the cylinder is elongated or shortened, the cylinder can push the swing mechanism to rotate around the vertical bearing with seat above.
[0010] The brake system pollutant backflush verification test bench of the application comprises a local hydraulic power source, a power source control component, a brake component and a power component; the local hydraulic power source and the hydraulic pipeline connected therewith are provided with an oil sampling port; the power source control component is connected to the local hydraulic power source through a cable, the oil inlet of a brake servo valve is connected to the oil supply port of the local hydraulic power source, the oil return port is connected to the oil return port of the local hydraulic power source, and the working port is connected to the brake device on the brake wheel; the servo valve control component is connected to the brake servo valve through a cable, and the power component comprises a swing mechanism and a cylinder; when the brake test is performed, the servo valve control component controls the brake servo valve to output a specified hydraulic pressure, the brake device works and brakes the brake wheel, the oil in the oil backflush test is sampled and analyzed, the pollution of the hydraulic oil is determined, and the brake device pollutant backflush condition is effectively simulated. BRIEF DESCRIPTION OF DRAWINGS
[0011] In order to more clearly illustrate the technical solutions provided by the application, the following will briefly introduce the drawings. Obviously, the drawings described below are only some embodiments of the application.
[0012] Figure 1 It is a schematic diagram of the overall structure of the application.
[0013] 1, local hydraulic power source; 2, power source control component; 3, brake servo valve; 4, servo valve control component; 5, brake wheel; 6, swing mechanism; 7, movable rack; 8, cylinder; 9, first working oil sampling port; 10, return oil sampling port; 11, second working oil sampling port. DETAILED DESCRIPTION
[0014] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only some of the embodiments of the application, not all. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.
[0015] A brake system pollutant backflush verification test bench, as shown in Figure 1 , comprises a local hydraulic power source 1, a power source control component 2, a brake component and a power component. The local hydraulic power source 1 is a closed-loop hydraulic flow path for providing hydraulic pressure oil to the brake component and the power component, and the local hydraulic power source 1 and the hydraulic pipeline connected therewith are provided with an oil sampling port. The power source control component 2 is connected to the local hydraulic power source 1 through a cable for controlling the start and stop of the local hydraulic source.
[0016] The brake component includes a brake servo valve 3 and a servo valve control component 4. The oil inlet of the brake servo valve 3 is connected with the oil supply port of the local hydraulic power source 1, the oil return port is connected with the oil return port of the local hydraulic power source 1, and the working port is connected with the brake device on the brake wheel 5. The servo valve control component 4 is connected with the brake servo valve 3 through a cable, and is used for outputting a control current to the brake servo valve 3, so that the brake servo valve 3 outputs a corresponding hydraulic pressure to drive the brake device to act. The servo valve control component 4 can continuously output a current signal in the range of 0-50 mA, and the signal form includes a triangular wave and a square wave, so that stable control of the brake servo valve 3 can be realized.
[0017] The power component includes a swing mechanism 6 and a cylinder 8. The lower end of the swing mechanism 6 is connected with the brake wheel 5, and the upper end is connected with a movable rack 7. The movable rack 7 is a support, which provides support for the swing mechanism 6 and the cylinder 8. The swing mechanism 6 works to drive the brake wheel 5 to move up and down. The middle part of the swing mechanism 6 is integrally provided with a connecting rod. The lower end of the cylinder 8 is hinged with the connecting rod of the swing mechanism 6, and the upper end is hinged with the movable rack 7, which is used to output the driving force of the brake mechanism to move up and down. A vertical bearing with seat is arranged above the swing mechanism 6. When the piston rod of the cylinder 8 is elongated or shortened, the cylinder 8 can push the swing mechanism 6 to rotate around the vertical bearing with seat above, so as to raise or lower the brake device.
[0018] The local hydraulic power source 1, the power control component 2, the brake servo valve 3, the servo valve control component 4, the swing mechanism 6 and the cylinder 8 are arranged according to the actual assembly of the brake system, and the pipelines between the components form a brake pipeline. When the oil backflushing test is performed, the local hydraulic power source 1 is started by the power control component 2. The hydraulic oil in the local hydraulic power source 1 outputs hydraulic oil into the cylinder 8. The cylinder 8 works and drives the brake wheel 5 to move up and down through the swing mechanism 6. When the brake mechanism is lowered to the lowest point, the brake test can be performed. In this process, the movable rack 7 provides support for the movement of the cylinder 8 and the swing mechanism 6. When the brake test is performed, the servo valve control component 4 controls the brake servo valve 3 to output a specified hydraulic pressure. The brake device works and brakes the brake wheel 5. By sampling and analyzing the oil in the oil backflushing test, the pollution of the hydraulic oil can be determined, so that the backflushing of the brake device can be effectively simulated.
[0019] The design of the oil sampling port is as follows: preferably, the brake servo valve 3 and the brake wheel 5 are connected through a brake pipeline. The upper end and the lower end of the brake pipeline are provided with a first working oil sampling port 9. A manual shut-off valve is arranged on the first working oil sampling port 9. The opening and closing of the working oil sampling port is realized through the manual shut-off valve. When the working oil sampling port is opened, the brake oil sampling is simple and convenient.
[0020] Preferably, the brake servo valve 3 is connected with the oil return port of the local hydraulic power source 1 through an oil return pipeline, an oil return oil sampling port 10 is arranged on the oil return pipeline and at the outlet of the oil return port of the brake servo valve 3, a manual stop valve is arranged on the oil return oil sampling port 10, and the oil return oil sampling is realized.
[0021] Preferably, a second working oil sampling port 11 is arranged at the outlet of the working port of the brake servo valve 3, at the middle section of the brake pipeline and at the inlet of the hydraulic pipe nozzle of the brake device, and the working oil sampling is realized.
[0022] Through the design of the present application, the relationship between the factors such as the length of the brake system pipeline, the vertical drop between the accessories and the brake device and the backflushing of the pollutants can be investigated and verified, the basis for the existing model field use and maintenance requirements can be provided, and the design of the new model brake system, the accessory and pipeline layout, the selection of the servo valve and the pollution protection can be supported. Further, the mechanical brittle response, temperature drift, excess pressure, brake lock, dragging tire and other faults caused by the excess material of the brake system and the pollution of the hydraulic system can be avoided, and the flight safety can be ensured.
[0023] Finally, it should be noted that: in the drawings of the disclosed embodiments, only the structures related to the disclosed embodiments are involved, other structures can be referred to the general design, and the same embodiments and different embodiments of the present application can be combined with each other under the condition of no conflict;
[0024] Finally: the above only describes the preferred embodiments of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims
1. A brake system contamination backwash verification test bench, characterized in that: The application relates to a hydraulic brake device, which comprises a local hydraulic power source (1), a power source control component (2), a brake component and a power component; an oil sampling port is arranged on the local hydraulic power source (1) and the hydraulic pipeline connected with the local hydraulic power source (1); the power source control component (2) is connected with the local hydraulic power source (1) through a cable and is used for controlling the start and stop of the local hydraulic power source; the brake component comprises a brake servo valve (3) and a servo valve control component (4); the oil inlet of the brake servo valve (3) is connected with the oil supply port of the local hydraulic power source (1), the oil return port is connected with the oil return port of the local hydraulic power source (1), and the working port is connected with a brake device on a brake wheel (5); the servo valve control component (4) is connected with the brake servo valve (3) through a cable and is used for outputting a control current to the brake servo valve (3); the power component comprises a swing mechanism (6) and a cylinder (8); the lower end of the swing mechanism (6) is connected with the brake wheel (5), and the upper end is connected with a movable rack (7); a connecting rod is arranged at the middle part of the swing mechanism (6) in an integrated mode; the lower end of the cylinder (8) is hinged with the connecting rod of the swing mechanism (6), and the upper end is hinged with the movable rack (7) and is used for outputting a driving force for the up-down movement of the brake mechanism.
2. The brake system contamination backflush verification test bench of claim 1, wherein, The brake servo valve (3) and the brake wheel (5) are connected through a brake pipeline, the upper end and the lower end of the brake pipeline are provided with a first working oil sampling port (9), a hand-operated stop valve is arranged on the first working oil sampling port (9), and the hand-operated stop valve is used for realizing the opening and closing control of the working oil sampling port.
3. The brake system contamination backflush verification test bench of claim 1, wherein, The brake servo valve (3) and the oil return port of the local hydraulic power source (1) are connected through an oil return pipeline, an oil return oil sampling port (10) is arranged on the oil return pipeline and the oil return port outlet of the brake servo valve (3), and a hand-operated stop valve is arranged on the oil return oil sampling port (10).
4. The brake system contamination backflush verification test bench of claim 2, wherein, A second working oil sampling port (11) is arranged at the working port outlet of the brake servo valve (3), the middle section of the brake pipeline and the hydraulic pipeline nozzle inlet of the brake device.
5. The brake system contamination backflush verification test bench of claim 1, wherein, A vertical bearing with a seat is arranged above the swing mechanism (6), and when the piston rod of the cylinder (8) is elongated or shortened, the cylinder (8) can push the swing mechanism (6) to rotate around the vertical bearing with a seat.