Portable airplane hydraulic test bed and use method thereof

Abstract

The invention belongs to the technical field of aviation hydraulic system test equipment, and discloses a portable airplane hydraulic test bed and a use method thereof, and the portable airplane hydraulic test bed comprises a vehicle body, a hydraulic pump station, a hydraulic control valve group, an air pressure control valve group, a pressure sensor and a control panel. The hydraulic test bed solves the problem that a traditional hydraulic test bed is difficult to meet the requirements of external field operation and emergency guarantee, and can meet the requirements of external field operation and emergency guarantee such as adjustment of reinstallation of a front landing gear and a main landing gear, exhaust of a brake system, air tightness inspection of a hydraulic guide pipe and pressurization test work of an oil tank.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of aviation hydraulic system test equipment, and particularly relates to a portable aircraft hydraulic test bench and a use method thereof. BACKGROUND

[0002] The aircraft hydraulic system is an important part of the aircraft, and its performance directly affects the safety and reliability of the aircraft. In the adjustment of the reinstallation of the front and main landing gears, the exhaust of the brake system, the air tightness check of the hydraulic conduit, and the oil tank pressure increasing test, the hydraulic system needs to be tested and adjusted. The traditional hydraulic test bench has the following limitations, which is difficult to meet the needs of field operation and emergency support: (1) Volume and weight problems The traditional hydraulic test bench integrates large hydraulic pumps, oil tanks, control cabinets and other components, and the overall structure is complex, resulting in a large volume and a weight of hundreds of kilograms or even several tons. For example, the size of a certain type of hydraulic test bench is 1.1m x 0.6m x 1.2m, and the weight is more than 300kg. When long-distance movement is required, a forklift or other large handling equipment is often needed.

[0003] (2) Single function and insufficient flexibility The traditional equipment has relatively fixed functions and can only meet the detection needs of part of the hydraulic and landing gear system.

[0004] To solve the above problems, the present application is proposed. SUMMARY

[0005] The present application aims to provide a portable aircraft hydraulic test bench and a use method thereof, which can solve the problem that the traditional hydraulic test bench is difficult to meet the needs of field operation and emergency support, and can meet the needs of the adjustment of the reinstallation of the front and main landing gears, the exhaust of the brake system, the air tightness check of the hydraulic conduit, and the oil tank pressure increasing test. The test bench is simple to operate, has high testing precision, is safe and reliable, has a small size, and can meet the needs of field operation and emergency support.

[0006] The technical solution of the present application is as follows: In a first aspect, the present application provides a portable aircraft hydraulic test bench, which comprises: a power unit providing hydraulic power through a hydraulic pump; a control unit composed of a hydraulic control valve group and an air pressure control valve group, for controlling the pressure and flow of the hydraulic system / air pressure system; a detection unit for measuring the pressure of the hydraulic system and the air pressure system; an execution unit composed of a plurality of test interfaces at the end of the hydraulic system / air pressure system, connected to the aircraft hydraulic system or the aircraft oil tank pressure increasing system through a hose. Auxiliary unit, which is composed of oil tank, filter, connecting pipeline, for oil conduction.

[0007] Further, the hydraulic control valve group includes a first pressure relief valve and a first shut-off valve, the first shut-off valve is arranged on the oil delivery pipeline, and the first pressure relief valve is arranged between the oil delivery pipeline and the oil return pipeline.

[0008] Further, the gas pressure control valve group includes a pressure regulating valve, a second pressure relief valve and a second shut-off valve, the pressure regulating valve and the second shut-off valve are connected in series on the gas delivery pipeline, and the second pressure relief valve is arranged on the pressure relief pipeline.

[0009] Further, comprising: A hydraulic system composed of an oil tank, a filter, a manual pump, a first pressure relief valve, a first pressure gauge, a first shut-off valve, an oil delivery pipeline and an oil return pipeline, one end of the oil delivery pipeline and the oil return pipeline is connected to the oil tank, the other end is connected with a test interface, the filter, the manual pump, the first shut-off valve and the first pressure gauge are arranged in sequence on the oil delivery pipeline; A gas pressure system composed of a second pressure gauge, a pressure regulating valve, a second pressure relief valve, a third pressure gauge, a second shut-off valve, a silencer, a gas delivery pipeline and a pressure relief pipeline, the second pressure gauge, the pressure regulating valve, the second shut-off valve and the third pressure gauge are arranged in sequence on the gas delivery pipeline, both ends of the gas delivery pipeline are provided with test interfaces, a pressure relief pipeline is arranged between the third pressure gauge and the test interface, and the second pressure relief valve and the silencer are arranged on the pressure relief pipeline.

[0010] Further, the hydraulic system and the gas pressure system are packaged in a vehicle body with a standardized structure, the vehicle body is composed of two portable boxes of the same size, one is a test bench box and the other is a hose accessory box.

[0011] Further, the vehicle body is made of high-strength lightweight alloy material, and the bottom is provided with a pull rod device and universal wheels.

[0012] Further, a control panel is integrated on the test bench box, the control panel is provided with a first pressure relief valve, a first pressure gauge, a first shut-off valve, a second pressure gauge, a pressure regulating valve, a second pressure relief valve, a third pressure gauge and a second shut-off valve, and an oil filling hole of the oil tank is also provided, which is sealed by an oil filling plug.

[0013] Further, the first pressure gauge monitors the oil delivery pressure of the hydraulic system after pressure boosting in real time, the second pressure gauge measures the inlet pressure of the gas pressure system, and the third pressure gauge measures the gas source regulating pressure of the gas pressure system.

[0014] Further, the first pressure gauge and the third pressure gauge are digital pressure gauges.

[0015] In a second aspect, the present application provides a portable aircraft hydraulic test bench using method, which comprises: Hydraulic landing gear system adjustment test, specifically comprising the following steps: The test bench is pushed to the vicinity of the aircraft hydraulic system, one end of the hose is connected to the test bench through the quick connector, the other end is connected to the aircraft hydraulic pipeline, and the oil injection plug is loosened in the counterclockwise direction; The digital pressure gauge switch is pressed, the pressure gauge starts self-checking, and normal work starts; According to the test requirements, the first pressure relief valve and the first shut-off valve are set; The hand pump is shaken to the target pressure, and the first shut-off valve is closed for pressure maintenance; After the test is completed, the first pressure relief valve and the first shut-off valve are opened in turn; After the test is completed, the power of the pressure gauge is turned off; The connection between the test bench and the aircraft hydraulic pipeline is disconnected, the connection between the hose and the test bench is disconnected through the quick connector, and the side door is closed; The oil tank pressurization system test, specifically comprising the following steps: The test bench is pushed to the vicinity of the aircraft oil tank pressurization system, one end of the hose is connected to the test bench through the quick connector, and the other end is connected to the aircraft oil tank pressurization system pipeline; The digital pressure gauge switch is pressed, the pressure gauge starts self-checking, and normal work starts; According to the test requirements, the pressure regulating valve, the second pressure relief valve and the second shut-off valve are set; The gas supply cylinder switch is turned on to the target pressure, and the second shut-off valve is closed for pressure maintenance; After the test is completed, the second pressure relief valve and the second shut-off valve are opened in turn; After the test is completed, the power of the pressure gauge is turned off; The connection between the test bench and the aircraft oil tank pressurization system pipeline is disconnected, the connection between the hose and the test bench is disconnected through the quick connector, and the side door is closed.

[0016] Compared with the prior art, the present application has the following advantages: 1、The present application realizes the aggregation of device functions and the compactness of space by optimizing the combination of hardware components, pipeline systems and control units through integrated layout design.

[0017] 2、The portable hydraulic test bench of the application has a volume reduced by more than 70% and a weight reduced by about 70% than traditional equipment through integrated layout design. The successfully developed portable hydraulic test bench has a test bench box size of 0.62m*0.45m*0.37m and a weight of about 20kg, and a hose accessory storage box size of 0.62m*0.45m*0.37m and a weight of about 15kg, which can be easily carried by technicians, greatly improving the mobility of the equipment. The equipment box can meet the requirements of air transportation, and has shown good application effect in the execution of aircraft field repair in a certain country in Africa in 2022. Preliminary estimates show that the use of the equipment instead of the original equipment of the company to perform the field repair task saves equipment transportation costs of 100,000 yuan (including round-trip costs) and saves equipment transportation cycle of 3 months (including round-trip and customs clearance time).

[0018] 3、The application integrates multiple detection functions, which not only meet the adjustment of the reinstallation of the front and main landing gear, but also expand the functions of brake system exhaust, hydraulic pipe gas tightness inspection, etc. through the configuration of different types of adapter connectors, and further expand the hydraulic oil tank pressure test function through the configuration of a gas pressure control system. With the help of mobile portability design and quick plug-in integrated interface design, the test bench can complete the on-site deployment and system connection of the test bench within 5 minutes, which is much better than the on-site deployment and system connection time of more than 30 minutes of traditional test benches.

[0019] The application will be further described in detail below in combination with the accompanying drawings of the embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 is a structural schematic diagram of a portable aircraft hydraulic test bench of the application; Fig. 2 is a system principle schematic diagram of a portable aircraft hydraulic test bench of the application; Fig. 3 is an operation panel function schematic diagram of a portable aircraft hydraulic test bench of the application. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the application clearer, the technical scheme of the embodiments of the application will be described in more detail below in combination with the accompanying drawings of the embodiments of the application.

[0022] In the drawings, the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The described embodiments are part of the embodiments of the application, not all of the embodiments.

[0023] The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, and should not be construed as limiting the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor fall within the scope of the present application.

[0024] The embodiments of the present application will be described below with reference to the drawings. Figs. 1-3 The embodiments of the present application will be described below with reference to the drawings.

[0025] Embodiment 1 The present application provides a portable aircraft hydraulic test bench, which comprises: a power unit for providing hydraulic power through a hydraulic pump; a control unit composed of a hydraulic control valve group and an air pressure control valve group for controlling the pressure and flow of the hydraulic system / air pressure system; a detection unit for measuring the pressure of the hydraulic system and the air pressure system; an execution unit composed of several test interfaces at the end of the hydraulic system / air pressure system, connected to the aircraft hydraulic system or aircraft tank pressurization system through a hose; an auxiliary unit composed of a tank, a filter, and a connecting pipeline for oil conduction.

[0026] Further, the hydraulic control valve group comprises a first pressure relief valve and a first shut-off valve, the first shut-off valve is arranged on the oil delivery pipeline, and the first pressure relief valve is arranged between the oil delivery pipeline and the oil return pipeline.

[0027] Further, the air pressure control valve group comprises a pressure regulating valve, a second pressure relief valve, and a second shut-off valve, the pressure regulating valve and the second shut-off valve are connected in series on the gas delivery pipeline, and the second pressure relief valve is arranged on the pressure relief pipeline.

[0028] Further, comprising: a hydraulic system composed of a tank, a filter, a manual pump, a first pressure relief valve, a first pressure gauge, a first shut-off valve, an oil delivery pipeline, and an oil return pipeline, one end of the oil delivery pipeline and the oil return pipeline is connected to the tank, and the other end is connected with a test interface, the filter, the manual pump, the first shut-off valve, and the first pressure gauge are arranged in sequence on the oil delivery pipeline; an air pressure system composed of a second pressure gauge, a pressure regulating valve, a second pressure relief valve, a third pressure gauge, a second shut-off valve, a silencer, a gas delivery pipeline, and a pressure relief pipeline, the second pressure gauge, the pressure regulating valve, the second shut-off valve, and the third pressure gauge are arranged in sequence on the gas delivery pipeline, both ends of the gas delivery pipeline are provided with test interfaces, the pressure relief pipeline is arranged between the third pressure gauge and the test interface, and the second pressure relief valve and the silencer are arranged on the pressure relief pipeline.

[0029] Further, the hydraulic system and the pneumatic system are packaged in the vehicle body in a standardized structure, the vehicle body is composed of two portable boxes of the same size, one is a test bench box, and the other is a hose accessory box. The test bench and the hose accessory storage box are designed in a draw-bar box type, the vehicle body is made of high-strength lightweight alloy material, the bottom is provided with a draw-bar device and a universal wheel. The connection between the hose and the test bench adopts a quick plug type integrated interface design.

[0030] Further, the control panel is integrated on the test bench box, the first pressure relief valve, the first pressure gauge, the first shut-off valve, the second pressure gauge, the pressure regulating valve, the second pressure relief valve, the third pressure gauge and the second shut-off valve are arranged on the control panel, and the oil tank is also provided with an oil filling hole which is sealed by an oil filling plug.

[0031] Further, the first pressure gauge monitors the oil delivery pressure after the hydraulic system is pressurized in real time, the second pressure gauge measures the air inlet pressure of the pneumatic system, and the third pressure gauge measures the air source regulating pressure of the pneumatic system.

[0032] Further, the first pressure gauge and the third pressure gauge adopt a digital pressure gauge.

[0033] The application also provides a use method of the portable aircraft hydraulic test bench, which comprises the following steps: The hydraulic system and the landing gear system adjustment test specifically comprises the following steps: The test bench is pushed to the vicinity of the aircraft hydraulic system, one end of the hose is connected to the test bench through a quick connector, the other end is connected to the aircraft hydraulic pipeline, and the oil filling plug is loosened in the counterclockwise direction; The digital pressure gauge switch is pressed, the pressure gauge starts self-checking, and normal work starts; According to the test requirements, the first pressure relief valve and the first shut-off valve are set; The hand pump is shaken to the target pressure, the first shut-off valve is closed, and pressure maintenance is performed; After the test is completed, the first pressure relief valve and the first shut-off valve are opened in sequence; After the test is completed, the power of the pressure gauge is turned off; The connection between the test bench and the aircraft hydraulic pipeline is disconnected, the connection between the hose and the test bench is disconnected through a quick connector, and the side door is closed; The oil tank pressurization system test specifically comprises the following steps: The test bench is pushed to the vicinity of the aircraft oil tank pressurization system, one end of the hose is connected to the test bench through a quick connector, and the other end is connected to the aircraft oil tank pressurization system pipeline; The digital pressure gauge switch is pressed, the pressure gauge starts self-checking, and normal work starts; According to the test requirements, the pressure regulating valve, the second pressure relief valve and the second shut-off valve are set; The gas supply cylinder switch is turned on to the target pressure, the second shut-off valve is closed, and pressure maintenance is performed; After the test is completed, open the second pressure relief valve and the second shut-off valve in turn; After the test is completed, turn off the power supply of the pressure gauge; Disconnect the test bench from the aircraft fuel tank pressurization system pipeline, disconnect the hose from the test bench through the quick connector, and close the side door.

[0034] The present application realizes equipment function aggregation and space compactness through the optimized combination of hardware components, pipeline systems and control units by integrated layout design. The present application adopts the following technical solutions: 1. Functional modularization partition The test bench is divided into a power unit (manual hydraulic pump), a control unit (various valve groups), a detection unit (pressure gauge), an execution unit (test interface) and an auxiliary unit (fuel tank, filter, connecting pipeline) according to functions. Each module is packaged with a standardized structure for easy independent maintenance and combined installation.

[0035] 2. Space three-dimensional utilization and lightweight structure A multi-layer stacking and vertical layout is adopted, the fuel tank is designed as a bottom base, the upper layer is installed with valve groups and control boards, and the side is integrated with quick interfaces to reduce horizontal floor area. At the same time, an integrated frame is made of lightweight materials such as aluminum alloy to reduce horizontal floor area, taking into account structural strength and weight optimization.

[0036] 3. Minimum capacity design of hydraulic oil tank based on system working condition The hydraulic oil tank is greatly reduced after theoretical calculation, and the balance between "volume optimization" and "function guarantee" is achieved from multiple dimensions such as oil capacity calculation and structural innovation to break through the system design framework. A high-precision filter element (3μ return oil filter element) is used to filter particulate pollutants in real time, so that the oil tank only serves as an "oil storage container" rather than a "purification container", thereby reducing the volume.

[0037] 4. Mobile portability design The test bench and the hose accessory storage box are designed in a drawstring box type, which deeply combines the functionality of the test bench with the mobility of a portable luggage box. The independent hose accessory storage box not only realizes centralized storage of hoses and adapters, but also avoids the bulkiness of the test bench.

[0038] 5. Quick plug-in integrated interface design The connection between the hose and the test bench adopts a quick plug-in integrated interface design to avoid time waste caused by complex installation procedures.

[0039] Embodiment 2 The composition of the present application includes a vehicle body, a hydraulic pump station, a hydraulic control valve group, an air pressure control valve group, a pressure sensor and a control panel.

[0040] Vehicle body: The vehicle body is composed of two portable boxes of the same size, one is a test bench box and the other is a hose accessory box. The vehicle body is made of high-strength lightweight alloy material, and a pull rod device and universal wheels are installed at the bottom for easy movement and fixation.

[0041] Hydraulic pump station: including hydraulic oil tank, hand pump and filter, used for providing hydraulic power. A switch valve is also provided on the hydraulic oil tank.

[0042] Hydraulic control valve group: including pressure relief valve and shut-off valve, used for controlling the pressure and flow of the hydraulic system.

[0043] Pneumatic control valve group: including pressure regulating valve, pressure relief valve and shut-off valve, used for controlling the pressure and flow of the pneumatic system.

[0044] Pressure sensor: used for measuring the pressure of the hydraulic system and the pneumatic system.

[0045] Control panel: provided with pressure regulating valve, pressure relief valve and shut-off valve, oil pressure display table, gas pressure display table and oil filling hole, used for controlling the hydraulic system and displaying test data.

[0046] The test bench as a whole includes two systems, one is a hydraulic pressure control system, including a hydraulic oil tank, a hand pump, two hydraulic switch ball valves (shut-off valve and pressure relief valve), and a digital pressure gauge; the other is a gas pressure control system, including a pressure regulating valve, two pneumatic switch ball valves (shut-off valve and pressure relief valve), a pressure regulating valve (pressure reducing valve), and two pressure gauges. There are two digital pressure gauges on the control panel, which display the gas source regulating pressure and the oil pressure respectively; the middle pointer pressure gauge is used to display the gas source supply (before pressure reduction) pressure.

[0047] (1) Hydraulic pressure control system: The hydraulic oil of the test bench oil tank reaches the oil filter (filter), and the filtered hydraulic oil passes through the hand pump and the ball valve, enters the aircraft hydraulic system, provides pressure for the system, and can perform front and main landing gear reinstallation adjustment, brake system exhaust, hydraulic conduit airtightness check. The pressure gauge monitors the system pressure during this process. The hand pump provides pressure, which can reach a maximum output pressure of 22Mpa and a flow of 9.4ml / cycle. The maximum working pressure of the hand pump and the oil pipeline is 15.2Mpa, and the overload pressure is 22Mpa.

[0048] (2) Gas pressure control system: The nitrogen pressure reaches the gas source pressure gauge through the gas source hose, then reaches the pressure regulating valve (pressure reducing valve) and is adjusted, and then the gas passes through the ball valve and the pressure gauge into the aircraft hydraulic system, which can perform tank pressure test inspection.

[0049] Thus, the purpose of the present application is achieved.

[0050] The above merely preferred embodiments of the present application are 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 portable aircraft hydraulic test stand characterized by, It comprises: a power unit which provides hydraulic power through a hydraulic pump; a control unit which is composed of a hydraulic control valve group and a pneumatic control valve group, for controlling the pressure and flow of the hydraulic system / pneumatic system; a detection unit which is used to measure the pressure of the hydraulic system and the pneumatic system; an execution unit which is composed of several test interfaces at the end of the hydraulic system / pneumatic system, connected with the aircraft hydraulic system or the aircraft tank pressurization system through a hose; an auxiliary unit which is composed of a tank, a filter, and a connecting pipeline, for oil conduction.

2. The portable aircraft hydraulic test stand of claim 1, wherein, The hydraulic control valve group comprises a first pressure relief valve and a first shut-off valve, the first shut-off valve is arranged on the oil delivery pipeline, and the first pressure relief valve is arranged between the oil delivery pipeline and the oil return pipeline.

3. The portable aircraft hydraulic test stand of claim 1, wherein, The pneumatic control valve group comprises a pressure regulating valve, a second pressure relief valve, and a second shut-off valve, the pressure regulating valve and the second shut-off valve are connected in series on the gas delivery pipeline, and the second pressure relief valve is arranged on the pressure relief pipeline.

4. The portable aircraft hydraulic test stand of claim 1, wherein, It comprises: a hydraulic system which is composed of a tank, a filter, a manual pump, a first pressure relief valve, a first pressure gauge, a first shut-off valve, an oil delivery pipeline, and an oil return pipeline, one end of the oil delivery pipeline and the oil return pipeline is connected to the tank, and the other end is connected with a test interface, the filter, the manual pump, the first shut-off valve, and the first pressure gauge are arranged in sequence on the oil delivery pipeline; a pneumatic system which is composed of a second pressure gauge, a pressure regulating valve, a second pressure relief valve, a third pressure gauge, a second shut-off valve, a silencer, a gas delivery pipeline, and a pressure relief pipeline, the second pressure gauge, the pressure regulating valve, the second shut-off valve, and the third pressure gauge are arranged in sequence on the gas delivery pipeline, both ends of the gas delivery pipeline are provided with test interfaces, the pressure relief pipeline is arranged between the third pressure gauge and the test interface, and the second pressure relief valve and the silencer are arranged on the pressure relief pipeline.

5. The portable aircraft hydraulic test stand of claim 4, wherein, The hydraulic system and the pneumatic system are packaged in a standardized structure in a vehicle body, and the vehicle body is composed of two portable boxes of the same size, one is a test bench box, and the other is a hose accessory box.

6. The portable aircraft hydraulic test stand of claim 5, wherein, The vehicle body is made of high-strength lightweight alloy material, and a pull rod device and a universal wheel are installed at the bottom.

7. The portable aircraft hydraulic test stand of claim 5, wherein, A control panel is integrated on the test bench box, and a first pressure relief valve, a first pressure gauge, a first shut-off valve, a second pressure gauge, a pressure regulating valve, a second pressure relief valve, a third pressure gauge, and a second shut-off valve are arranged on the control panel, and an oil filling hole of the tank is also arranged, which is sealed by an oil filling plug.

8. The portable aircraft hydraulic test stand of claim 7, wherein, The first pressure gauge monitors the oil delivery pressure after the hydraulic system is pressurized in real time, the second pressure gauge measures the inlet pressure of the pneumatic system, and the third pressure gauge measures the gas source regulating pressure of the pneumatic system.

9. The portable aircraft hydraulic test stand of claim 8, wherein, The first pressure gauge and the third pressure gauge are digital pressure gauges.

10. The method of using a portable aircraft hydraulic test stand characterized by, It comprises: Hydraulic and landing gear system adjustment test, specifically comprising the following steps: Push the test bench to the vicinity of the aircraft hydraulic system, connect one end of the hose to the test bench through a quick connector, and connect the other end to the aircraft hydraulic pipeline, loosen the oil filling plug in the counterclockwise direction; Press the digital pressure gauge switch, the pressure gauge starts self-checking, and starts working normally; According to the test requirements, set the first pressure relief valve and the first shut-off valve; Rock the manual pump to the target pressure, and close the first shut-off valve for pressure maintenance; After the test is completed, open the first pressure relief valve and the first shut-off valve in sequence; After the test is completed, turn off the power of the pressure gauge; Disconnect the test bench from the aircraft hydraulic line, disconnect the hose from the test bench through the quick connector, and close the side door. The oil tank pressurization system test, specifically including the following steps: Push the test bench to the vicinity of the aircraft oil tank pressurization system, connect one end of the hose to the test bench through the quick connector, and connect the other end to the aircraft oil tank pressurization system pipeline; Press the digital pressure gauge switch, the pressure gauge starts self-checking, and starts working normally; According to the test requirements, set the pressure regulating valve, second pressure relief valve and second shut-off valve; Open the gas cylinder switch to the target pressure, close the second shut-off valve, and perform pressure maintenance; After the test is completed, open the second pressure relief valve and the second shut-off valve in turn; After the test is completed, turn off the pressure gauge power; Disconnect the test bench from the aircraft oil tank pressurization system pipeline, disconnect the hose from the test bench through the quick connector, and close the side door.

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