Unmanned aerial vehicle hydraulic universal adapter and method

Abstract

The invention discloses an unmanned aerial vehicle hydraulic universal adapter and a method, and belongs to the technical field of hydraulic adapters. Comprising a pressure / flow control unit, a control unit and a power supply unit, the pressure / flow control unit is connected between an external hydraulic source and an unmanned aerial vehicle hydraulic system, the output pressure / flow of the external hydraulic source is controlled and adjusted through the control unit, then hydraulic energy meeting the requirement of the aircraft hydraulic system is output, and pressure supply or refueling of the aircraft hydraulic system can be completed. The control unit is used for controlling working parameters of the pressure / flow control unit based on pressure / flow parameter requirements of an aircraft hydraulic system; and the power supply unit is used for supplying power to the pressure / flow control unit and the control unit. According to the invention, the generalization guarantee of various airplane hydraulic systems is realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydraulic adapters, and in particular relates to a hydraulic universal adapter and method for unmanned aerial vehicles. Background Art

[0002] The hydraulic systems of large and medium-sized manned aircraft and unmanned aerial vehicle equipment need to obtain protection from the hydraulic equipment at the station. However, since the hydraulic system parameter indicators of different models are also different, the relationship between pressure and flow varies. At present, when staff perform maintenance on large and medium-sized manned aircraft and unmanned aerial vehicle equipment, they need to manually adjust the equipment to output to the appropriate flow and pressure values. Errors or mistakes are prone to occur during manual adjustment, which affects the maintenance efficiency of large and medium-sized manned aircraft and unmanned aerial vehicle equipment. Summary of the invention

[0003] Technical issues to be solved:

[0004] In order to avoid the shortcomings of the prior art, the present invention provides a hydraulic universal adapter for unmanned aerial vehicles. The adapter is connected to the hydraulic interfaces of existing station hydraulic equipment, large and medium-sized manned aircraft, and unmanned aerial vehicle equipment, and controls the pressure and flow output by the hydraulic equipment to be converted into corresponding working parameter values ​​of the hydraulic systems of various types of aircraft. Combined with the configured hydraulic connectors of corresponding aircraft models, universal protection of the hydraulic systems of various types of aircraft can be achieved.

[0005] The technical solution of the present invention is: a hydraulic universal adapter for unmanned aerial vehicles, comprising a pressure / flow control unit and a control unit and a power supply unit connected thereto; the pressure / flow control unit is connected between an external hydraulic source and a hydraulic system of the unmanned aerial vehicle, and the output pressure / flow of the external hydraulic source is controlled and adjusted by the control unit, and then a hydraulic energy that meets the requirements of the hydraulic system of the aircraft is output, so as to complete the pressure supply or refueling of the hydraulic system of the aircraft;

[0006] The control unit controls the working parameters of the pressure / flow control unit based on the pressure / flow parameter requirements of the aircraft hydraulic system;

[0007] The power supply unit is used to supply power to the pressure / flow control unit and the control unit.

[0008] A further technical solution of the present invention is: the pressure / flow control unit includes a pressure supply pipeline, an oil return pipeline and a refueling pipeline; the oil from the external hydraulic source is input into the aircraft hydraulic system through the pressure supply pipeline, the oil in the aircraft hydraulic system tank is sucked back to the external hydraulic source through the oil return pipeline, and the oil input from the external hydraulic source enters the aircraft hydraulic oil tank through the aircraft refueling port through the refueling pipeline.

[0009] A further technical solution of the present invention is: the pressure supply pipeline is connected with a pressure supply transfer valve, a quick connector, a proportional pressure reducing valve, a proportional flow valve, a buffer valve, a pressure transmitter, an oil filter, a stop valve, a pressure supply hose, a quick connector, and a pressure supply valve in sequence along the pipeline; the oil enters the pressure supply pipeline from an external hydraulic source through the pressure supply transfer valve, is output from the pressure supply valve to the aircraft pressure supply valve and enters the aircraft hydraulic system, and a safety valve and a pressure regulating / pressure relief valve are provided on the oil supply pipeline.

[0010] A further technical solution of the present invention is: the return oil pipeline is connected to the oil suction valve, quick connector, adapter return oil hose, one-way valve, water removal multi-way module, temperature sensor, quick connector, and return oil transfer valve in sequence along the pipeline; the oil enters the return oil pipeline from the aircraft hydraulic system through the oil suction valve, is output from the return oil pipeline to the return oil transfer valve and enters the external hydraulic source; a sampling valve and a safety valve are provided on the return oil pipeline.

[0011] A further technical solution of the present invention is: the refueling pipeline is connected with a pressure supply transfer valve, a quick connector, a proportional pressure reducing valve, a proportional flow valve, a buffer valve, a pressure transmitter, an oil filter, a solenoid valve, a refueling hose, a quick connector, and a refueling valve / connector in sequence along the pipeline; the oil enters the refueling pipeline from an external hydraulic source through the pressure supply transfer valve, is output from the refueling pipeline to the refueling valve / connector, and enters the aircraft hydraulic oil tank through the aircraft refueling port, and a safety valve and a pressure regulating / relieving valve are provided on the refueling pipeline; wherein the pressure supply transfer valve, the quick connector, the proportional pressure reducing valve, the proportional flow valve, the buffer valve, the pressure transmitter, and the oil filter are shared with the pressure supply pipeline.

[0012] A further technical solution of the present invention is that the pressure / flow control unit also includes an oil dehydration device, which includes a refueling hose, a refueling filter, a refueling stop valve, a manual reversing valve, a gear pump, a motor, a check valve, an oil supply filter, a pressure transmitter, a temperature transmitter, a pressure regulating stop valve, a sampling valve, a safety valve, an oil supply hose, a first quick connector, a second quick connector, an oil return hose, a flow regulating valve, a coarse air filter, a fine air filter, a purification tank, a differential pressure sensor, an absolute pressure sensor, a transparent hose, an oil-water separator, a vacuum pump, and a back pressure valve; the first quick connector and the second quick connector are respectively connected to the hydraulic After the water removal multi-channel module of the universal adapter is connected, the reversing valve is switched to the circulation position, the motor and the vacuum pump are started, and the oil in the hydraulic universal adapter passes through the first quick connector, the oil return hose, and the back pressure valve, and enters the purification tank. From the purification tank, the oil flows through the reversing valve, is pumped out by the gear pump, and passes through the check valve, oil filter, pressure transmitter, temperature transmitter, pressure regulating stop valve, sampling valve, safety valve, oil supply hose, and the second quick connector, and returns to the hydraulic system of the hydraulic universal adapter; at the same time, the vacuum pump is started, and the gas enters the purification tank through the flow control valve, the coarse air filter, and the fine air filter, and then is discharged through the oil-water separator and the vacuum pump;

[0013] When refueling the purification tank, after the refueling hose is extended into the oil barrel, the reversing valve is switched to the refueling position, the refueling stop valve and the pressure regulating stop valve are opened, and the motor is started to drive the oil pump to run. The oil enters the purification tank through the refueling hose, the refueling oil filter, the refueling stop valve, the reversing valve, the gear pump, the one-way valve, the oil filter, the pressure transmitter, the temperature transmitter, and the pressure regulating stop valve. When the oil level in the purification tank reaches the set value, the device automatically stops running and prompts that the refueling is completed.

[0014] A further technical solution of the present invention is: the control unit includes a control panel and a display operation interface, the control panel monitors the pressure parameters of the adapter in real time through the integrated AD analog input channel, monitors the oil filter status through the DI switch input channel, and displays the data on the operation interface after system data information processing; the user realizes human-computer interaction through the operation interface on the display screen, the system performs data analysis through interface operation instruction feedback, and then realizes pressure / flow control through the DA analog output channel, and realizes pressure regulation automatic / manual mode conversion by controlling the intermediate relay through the DO switch output channel, thereby realizing the conversion and regulation of the adapter output oil pressure and flow.

[0015] A further technical solution of the present invention is: the power supply unit is AC220V / 50Hz, including a leakage protector, a relay, a switching power supply, and a power cable, and the power supply has overcurrent, leakage, over-voltage, under-voltage, and short-circuit protection prompts;

[0016] The leakage protector is used for overcurrent and leakage protection of the main power supply circuit and as a switch to cut off the power supply during maintenance. It is selected as 2-pole 2A and leakage current 30mA;

[0017] The relay is used for system power switch and automatic / manual conversion of pressure regulation;

[0018] The switching power supply is used to power the control panel, sensor, solenoid valve, and relay, with an output power of 200W, an input voltage range of 175V to 264V, 50Hz / 60Hz, and shielding measures to prevent electromagnetic radiation from interfering with the control system;

[0019] The power cable is used for external power supply and adopts three-core cable, 3×1.0mm 2 , length is 20m.

[0020] A method for testing / cleaning a drone using a drone hydraulic universal adapter, the specific steps are as follows:

[0021] Connecting the input end of the pressure supply pipeline to an external hydraulic source, and connecting the output end to an aircraft hydraulic system;

[0022] The input end of the oil return pipeline is connected to the aircraft hydraulic system, and the output end is connected to an external hydraulic source;

[0023] The oil is output from the external hydraulic source, passes through the pressure supply transfer valve, quick connector, proportional pressure reducing valve, proportional flow valve, buffer valve, pressure transmitter, oil filter, stop valve, pressure supply hose, quick connector, pressure supply valve to the aircraft pressure supply valve, and enters the aircraft hydraulic system;

[0024] The oil flows from the oil tank suction interface of the aircraft hydraulic system through the oil suction valve, quick connector, and enters the adapter oil return hose, check valve, water removal multi-way module, temperature sensor, quick connector, oil return transfer valve, and then the oil returns to the external hydraulic source through the oil suction hose;

[0025] The oil converts and controls the hydraulic energy provided by the external hydraulic source through the oil supply pipeline and the oil return pipeline, completes the pressure supply test of the flight control actuator and the landing gear retraction and extension load, and cleans the on-board hydraulic system or local pipelines to remove solid particle contaminants in the hydraulic system.

[0026] A method for refueling a drone using a universal hydraulic adapter for drones, the specific steps are as follows:

[0027] Connecting the input end of the refueling pipeline to an external hydraulic source, and connecting the output end to the aircraft hydraulic system;

[0028] The oil is output from the external hydraulic source, through the pressure supply transfer valve, quick connector, proportional pressure reducing valve, proportional flow valve, buffer valve, pressure transmitter, oil filter, solenoid valve, refueling hose, quick connector, refueling valve / connector to the aircraft refueling port and enters the aircraft hydraulic oil tank;

[0029] The working medium is converted and controlled through the refueling pipeline to pressure-refuel the hydraulic system tank on the machine.

[0030] Beneficial Effects

[0031] The beneficial effect of the present invention is that after the adapter of the present invention is connected in series with the external hydraulic source, the output pressure / flow of the external hydraulic source is controlled and adjusted by the control unit, and then the hydraulic energy that meets the requirements of the hydraulic systems of various types of aircraft is output, replacing the on-board hydraulic pump to supply pressure to the on-board hydraulic system, thereby realizing ground testing, air tightness inspection, cleaning, and refueling of the hydraulic oil tank of the on-board hydraulic system.

[0032] The present invention has intelligent control capability, and its control unit and power supply unit have power indication, working pressure, oil temperature, oil filter status and other parameter displays and oil filter blockage alarm, system overpressure protection, oil overtemperature protection, power overcurrent, over- and undervoltage protection, and fault alarm functions.

[0033] The adapter of the present invention is respectively provided with an oil supply / return pipeline and an oil filling pipeline, so as to realize universal protection for hydraulic systems of different models. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A block diagram of the working principle of the hydraulic universal adapter for unmanned aerial vehicles in an embodiment of the present invention;

[0035] Figure 2 A schematic diagram of the system composition of the hydraulic universal adapter for unmanned aerial vehicles in an embodiment of the present invention;

[0036] Figure 3 A schematic diagram of the body structure of the hydraulic universal adapter for unmanned aerial vehicles in an embodiment of the present invention;

[0037] Figure 4 Hydraulic principle diagram of the on-line test / on-line cleaning of the hydraulic universal adapter for unmanned aerial vehicles in the embodiment of the present invention;

[0038] Figure 5 Schematic diagram of the pressure transfer valve of the hydraulic universal adapter for unmanned aerial vehicles in an embodiment of the present invention;

[0039] Figure 6 Schematic diagram of the oil return transfer valve of the hydraulic universal adapter of the UAV in the embodiment of the present invention;

[0040] Figure 7 A working principle diagram of the hydraulic universal adapter for unmanned aerial vehicles in an embodiment of the present invention for refueling the aircraft hydraulic oil tank;

[0041] Figure 8 Schematic diagram of the hydraulic universal adapter of the unmanned aerial vehicle in the embodiment of the present invention in conjunction with the oil dehydration device for vacuum dehydration;

[0042] Fig. 9 A schematic diagram of the electrical principle of the hydraulic universal adapter for unmanned aerial vehicles in an embodiment of the present invention;

[0043] Fig.10 Schematic diagram of the main operation interface of the hydraulic universal adapter for unmanned aerial vehicles in an embodiment of the present invention.

[0044] Explanation of reference numerals: 1. Quick connector, 2. Supply pressure transfer valve, 2-1. Quick connector, 2-2. YXF-183 valve; 3. Proportional pressure reducing valve, 4. Proportional flow valve, 5. Pressure transmitter, 6. Buffer valve, 7. Stop valve, 8. Oil filter, 9. Solenoid valve, 10. Refueling hose, 11. Supply pressure hose, 12. Quick connector, 13. Supply pressure valve, 14. Suction valve, 15. Quick connector, 16. Oil return hose into adapter, 17. Safety valve, 18. Check valve, 19. Sampling valve, 20. Temperature sensor, 21. Quick connector, 22. Return oil transfer valve, 22-1. Quick connector, 22-2. YXF-184 valve; 23. Safety valve, 24. Pressure regulating / pressure relief valve, 25. Safety valve, 26. Quick connector, 27. Refueling valve / connector, 28. Self-circulation interface, 29. Removal Water multi-channel module, 30. Quick connector, 31. Quick connector; 32. Pressure / flow control unit, 33. Power supply unit, 34. Control unit, 35. Vehicle structure; 41. Refueling hose, 42. Refueling oil filter, 43. Refueling stop valve, 44. Manual reversing valve, 45. Gear pump, 46. Motor, 47. Check valve, 48. Fuel supply oil filter, 49. Pressure transmitter, 50. Temperature transmitter, 51. Pressure regulating stop valve, 52. Sampling valve, 53. Safety valve, 54. Fuel supply hose, 55. First quick connector, 56. Second quick connector, 57. Oil return hose, 58. Flow control valve, 59. Air filter coarse, 60. Air filter fine, 61. Purification tank, 62. Differential pressure sensor, 63. Absolute pressure sensor, 64. Transparent hose, 65. Oil-water separator, 66. Vacuum pump, 67. Back pressure valve. DETAILED DESCRIPTION

[0045] The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0047] Based on the fact that currently when staff perform maintenance on large and medium-sized manned aircraft and unmanned aircraft equipment, they need to manually adjust the equipment to output to appropriate flow and pressure values. Errors or mistakes are prone to occur during manual adjustment, affecting the maintenance efficiency of large and medium-sized manned aircraft and unmanned aircraft equipment. The present invention provides a hydraulic universal adapter for unmanned aircraft, including a pressure / flow control unit and a control unit and a power supply unit connected thereto; the pressure / flow control unit is connected between an external hydraulic source and a hydraulic system of the unmanned aircraft, and the output pressure / flow of the external hydraulic source is controlled and adjusted by the control unit, and then hydraulic energy that meets the requirements of the aircraft hydraulic system is output, thereby completing the pressure supply or refueling of the aircraft hydraulic system; the control unit controls the working parameters of the pressure / flow control unit based on the pressure / flow parameter requirements of the aircraft hydraulic system; the power supply unit is used to supply power to the pressure / flow control unit and the control unit.

[0048] Specifically, the pressure / flow control unit includes a pressure supply pipeline, an oil return pipeline and a refueling pipeline; the oil from the external hydraulic source is input into the aircraft hydraulic system through the pressure supply pipeline, the oil in the aircraft hydraulic system tank is sucked back to the external hydraulic source through the oil return pipeline, and the oil input from the external hydraulic source enters the aircraft hydraulic oil tank through the aircraft refueling port through the refueling pipeline.

[0049] The above technical solution is further described below with reference to the accompanying drawings and examples:

[0050] In this embodiment, the adapter is connected to the hydraulic interfaces of existing station hydraulic equipment, large and medium-sized manned aircraft, and unmanned aircraft equipment, and the pressure and flow output by the hydraulic equipment are controlled and converted into the corresponding working parameter values ​​of the hydraulic system of the four types of aircraft. Combined with the configured hydraulic connectors of the corresponding aircraft models, the universal protection of the hydraulic system of the four types of aircraft is realized. The adapter follows the AC-B / YLC-1 traction hydraulic oil pump truck four-combination, and has been used in the field for 8 years. The CB-B / YLC-3A traction hydraulic oil pump truck four-combination, and has been used in the field for 7 years. With mature technology, the mechanical, electrical, and hydraulic integration technology controlled by a single-chip microcomputer is applied, and with the support of special software, the working mode of the corresponding working parameters is automatically configured to realize the universalization, miniaturization, and intelligence of the equipment.

[0051] Main technical indicators: Working medium: Applicable to aviation hydraulic oils such as No. 15 (GJB1177A-2013) and YH-10 (SY1181-1976). Working pressure: (0~22)MPa, manually adjustable, the following are preset pressures according to the model: 21+0.7-0.3MPa; (21.3±0.5)MPa; 16+0.7 -0.3MPa; Working flow rate: (0~50)L / min. Refueling pressure: (0~0.5)MPa, manually adjustable. Oil contamination index: The solid particle contamination of the hydraulic system is not inferior to GJB420B-6 level when leaving the factory. The adapter is equipped with safety valves on the oil supply and return lines to ensure the safety of the aircraft's oil supply and return systems. The adapter is equipped with pressure supply lines, oil return lines, and refueling lines. Each connection interface is marked with a sign for user convenience. The adapter is powered by a 220V, 50Hz single-phase AC power supply. Weight: not more than 90kg. Reliability: Mean time between failures MTBF ≥ 1000 hours. Maintainability: Mean time to repair MTTR at the grassroots level ≯ 1 hour.

[0052] Reference Figure 1 As shown, after the adapter of this embodiment is connected in series with the external hydraulic source, the output pressure / flow of the external hydraulic source is controlled and adjusted by the control unit, and then the hydraulic energy that meets the requirements of the hydraulic system of the four types of aircraft is output, replacing the on-board hydraulic pump to supply pressure to the on-board hydraulic system, thereby realizing the on-board hydraulic system ground test, air tightness inspection, cleaning, and hydraulic oil tank refueling.

[0053] Reference Figure 2 and Figure 3 As shown, the adapter of this embodiment mainly consists of four parts: a vehicle body structure 35, a pressure / flow control unit 32, a power supply unit 33, and a control unit 34. The vehicle body structure 35 adopts a three-wheel load-bearing form, and the wheels adopt oil-resistant rubber wheels. The front wheel is 360° turned into a cart chassis with brakes, which can be easily moved by one person. The ergonomic design is carried out with reference to GJB2873-1997 "Ergonomic Design Guidelines for Military Equipment and Facilities". An electrical control cabinet is arranged on the upper part of the vehicle body, and a control display screen is installed on the upper part of the electrical control cabinet. The height is designed according to human operating habits, which is convenient for operation and observation, and operation buttons are set. The vehicle body display screen is provided with a dust cover, and the lower end is convenient for opening and maintenance. The oil supply hose, oil return hose, refueling hose and cable are placed around the vehicle body. A push handle is arranged at the front end of the vehicle body. A water blocking line is arranged at the joint of each door cover of the vehicle body, and a sealing strip is installed, and the whole vehicle is waterproofed. The surface is painted with baking varnish and is resistant to acid, alkali, salt and fog corrosion, as well as wear and impact. It is also screen printed for identification.

[0054] Reference Figure 4As shown, the pressure / flow control unit 32 of the adapter of this embodiment includes a quick connector 1, a pressure supply transfer valve 2, a proportional pressure reducing valve 3, a proportional flow valve 4, a pressure transmitter 5, a buffer valve 6, a stop valve 7, an oil filter 8, a solenoid valve 9, a refueling hose 10, a pressure supply hose 11, a quick connector 12, a pressure supply valve 13, an oil suction valve 14, a quick connector 15, an oil return hose 16 entering the adapter, a safety valve 17, a one-way valve 18, a sampling valve 19, a temperature sensor 20, a quick connector 21, an oil return transfer valve 22, a safety valve 23, a pressure regulating / pressure relief valve 24, a safety valve 25, a quick connector 26, a refueling valve / connector 27, a self-circulation interface 28, a water removal multi-channel module 29, a quick connector 30, and a quick connector 31;

[0055] Reference Figure 5 As shown, the pressure supply transfer valve 2 is used to connect the adapter to the external hydraulic source pressure supply interface. It can be connected to other types of external hydraulic source pressure supply interfaces by simply replacing the pressure supply transfer valve model.

[0056] Reference Figure 6 As shown, the oil return transfer valve 22 is used to connect the adapter to the oil return interface of the external hydraulic source. It can be connected to other types of external hydraulic source oil return interfaces by simply replacing the oil return transfer valve model.

[0057] The proportional pressure reducing valve 3 is used for pressure control, and the output pressure setting range is 0 to 22 MPa. The working characteristics are shown in Table 1.

[0058] Table 1: Operating characteristics of proportional pressure reducing valve

[0059]

[0060] The proportional flow valve 4 is used for flow control, and the flow adjustment range is 1 to 160 L / min. The working characteristics are shown in Table 2.

[0061] Table 2: Operating characteristics of proportional flow valve

[0062]

[0063]

[0064] The pressure transmitter is used for monitoring the system supply pressure, with a measuring range of 0-25MPa, a power supply of DC24V, an output of 0-5V, and an accuracy of 0.5%FS.

[0065] The hydraulic oil filter pressure supply part has no bypass valve and is equipped with a differential pressure sensor. The working characteristics are shown in Table 3.

[0066] Table 3: Working characteristics of hydraulic oil filter

[0067] Maximum working pressure 22MPa Maximum flow 80L / min Filtration accuracy <![CDATA[3μm,β3≥200]]> Bypass valve none Pressure difference alarm value 6.9±1bar

[0068] The sampling valve is used for system oil sampling and testing, adopts a needle valve, has a flow rate of 5L / min, and a pressure resistance of ≥1.5Mpa.

[0069] The buffer valve is used to suppress hydraulic shock and protect the pressure transmitter.

[0070] The safety valves are 3 in total, which provide safety protection for the system pressure supply passage, the system oil return passage and the refueling passage respectively.

[0071] The stop valves are two in total, used to close the pressure supply circuit and provide a pressure relief passage for the system when the equipment is shut down.

[0072] The solenoid valve is used to close / open the refueling circuit.

[0073] The integrated temperature sensor: monitors the system working oil temperature, and the control system issues an over-temperature parking alarm according to the set temperature control point. The measurement range is -50℃~200℃, the power supply is DC24V, the output is 0~5V, and the accuracy is 0.5%.

[0074] Hydraulic pipeline: The oil return part adopts Ф18 aviation stainless steel pipe; the high-pressure part adopts Ф13 aviation stainless steel pipe; the refueling part adopts Ф8 aviation stainless steel pipe.

[0075] The quick connector is used for quick connection / replacement of the pressure supply, oil return and refueling hoses with the pressure supply, oil return and refueling valves on the machine and for conversion connection of the equipment self-circulation connector.

[0076] The pressure supply valve: 4 pieces, matched and connected with the interface of the type 4 machine.

[0077] The oil return valve: 4 pieces, matched and connected with the interface of the type 4 machine.

[0078] The pressure supply, oil return and refueling hoses provide external connection pipelines for the equipment. The pressure supply hose 13II-4000C has a length of 4 meters, a diameter of Ф13 and a working pressure of 25 MPa. The oil return hose (22I-4000C) has a length of 4 meters, a diameter of Ф22 and a working pressure of 5 MPa. The refueling hose (06I-4000C) has a length of 4 meters, a diameter of Ф6 and a working pressure of 5 MPa. The hoses are marked.

[0079] The water removal multi-pass module provides a parallel interface for the oil water removal device.

[0080] Reference Figure 4 As shown, the working principle of the adapter in this embodiment for online testing / online cleaning is as follows:

[0081] Oil supply part: The oil is output from the external hydraulic source, and enters the aircraft hydraulic system through the pressure supply transfer valve 2, quick connector 1, proportional pressure reducing valve 3, proportional flow valve 4, buffer valve 6, pressure transmitter 5 [to monitor the oil supply pressure of the equipment. After the output signal of the pressure transmitter is processed by the control system, the oil pressure is displayed on the operation screen. When the oil supply pressure is greater than or equal to the set value, the equipment automatically stops supplying pressure and prompts "System overpressure, please check the corresponding components." ], oil filter 8, stop valve 7, pressure supply hose 11, quick connector 12, pressure supply valve 13, and aircraft pressure supply valve. Safety valve 23 and pressure regulating / pressure relief valve 24 are provided on the oil supply pipeline.

[0082] Oil return part: The oil flows from the aircraft hydraulic oil tank suction port through the oil suction valve 14, quick connector 15, and enters the adapter oil return hose 16, check valve 18, water removal multi-pass module 29, and temperature sensor 20. After the temperature sensor output signal is processed by the control system, the return oil temperature is displayed on the operation screen. When the oil temperature exceeds the set value, the equipment stops supplying pressure and prompts "System overtemperature, wait until the oil temperature drops to 50℃, then start the equipment.", quick connector 21, return oil transfer valve 22, and then the oil returns to the external hydraulic source through the oil suction hose. A sampling valve 19 and a safety valve 17 are provided on the return oil pipeline.

[0083] Reference Figure 7 As shown, the working principle of the adapter in this embodiment for refueling the aircraft hydraulic oil tank is:

[0084] The oil is output from the external hydraulic source, and enters the aircraft hydraulic oil tank through the pressure transfer valve 2, quick connector 1, proportional pressure reducing valve 3, proportional flow valve 4, buffer valve 6, pressure transmitter 5 [to monitor the equipment's refueling oil pressure. The output signal of the pressure transmitter is processed by the control system and the oil pressure is displayed on the operation screen. When the oil supply pressure is greater than or equal to the set value, the equipment automatically stops supplying pressure and prompts "System overpressure, please check the corresponding components." ], oil filter 8, solenoid valve 9, refueling hose 10, quick connector 26, refueling valve / connector 27 through the aircraft refueling port. Safety valve 25 and pressure regulating / pressure relief valve 24 are provided on the refueling pipeline.

[0085] Reference Figure 8 As shown, the working principle of the adapter and the oil dehydration device in this embodiment to perform vacuum dehydration is as follows:

[0086] The vacuum dewatering function needs to be used in parallel with the hydraulic universal adapter. The external hydraulic source needs to use the closed pressure supply mode. The device pressure / flow control unit selects the online test / cleaning function to dewater the onboard hydraulic system. The oil enters the adapter return oil circuit from the aircraft return oil port, enters the oil dewatering device through the dewatering multi-way module, and after dewatering, returns to the dewatering multi-way module and then to the external hydraulic source. The dewatered oil finally enters the aircraft hydraulic system through the oil supply circuit to achieve aircraft oil dewatering. The oil dewatering device uses vacuum dewatering.

[0087] After the first quick connector 55 and the second quick connector 56 are connected to the hydraulic universal adapter respectively, the reversing valve 44 is switched to the circulation position, and the motor 46 and the vacuum pump 66 are started. The oil in the hydraulic universal adapter passes through the quick connector 56, the oil return hose 57, and the back pressure valve 57, and enters the purification tank 51 (the purification tank is provided with a differential pressure transmitter 62 to monitor the liquid level in the tank. When the liquid level exceeds the set value, the system will stop and prompt the user), flows from the purification tank 61 through the reversing valve 44, is pumped out by the gear pump 45, and passes through the one-way valve 47, the oil filter 48, the pressure transmitter 49, the temperature transmitter 50, the pressure regulating stop valve 51, the sampling valve 52 (the oil sample can be sampled for offline contamination detection), the safety valve 53 (used to protect the hydraulic system and prevent the system oil pressure from being too high), the oil supply hose 54, and the quick connector 55, and returns to the hydraulic system of the hydraulic universal adapter.

[0088] At the same time, the vacuum pump 66 is started, and the gas enters the purification tank 61 through the flow regulating valve 58, the air filter (coarse) 59, and the air filter (fine) 60 (the purification tank is provided with an absolute pressure transmitter 63 to monitor the vacuum degree in the tank. When the vacuum degree exceeds the set value, the system will stop and prompt the user), and then is discharged through the oil-water separator 65 and the vacuum pump 66.

[0089] Reference Fig. 9 As shown, the power supply mode of the adapter in this embodiment is: AC220V / 50Hz, consisting of a leakage protector, a relay, and a switching power supply. The power supply has overcurrent, leakage, over-voltage, and short-circuit protection prompts. The leakage protector: used for overcurrent and leakage protection of the main power supply circuit and as a switch to cut off the power supply during maintenance. It is selected as 2-pole 2A, and the leakage current is 30mA. The relay: a total of 2 pieces, used for system power switch and automatic / manual pressure adjustment. The switching power supply: used to power the control panel, sensor, solenoid valve, and relay, with an output power of 200W and an input voltage range of 175V~264V 50Hz / 60Hz. It has shielding measures to prevent electromagnetic radiation from interfering with the control system. The power cable: used for external power supply, using a three-core cable, 3×1mm 2 , length is 20m.

[0090] Reference Fig.10As shown, the adapter of this embodiment adopts the control board of the embedded single-chip control system independently developed to realize the automatic control of the mechanical, electrical and hydraulic integration, the high-brightness LCD display with built-in touch function, and the operation interface developed by professional software for human-computer interaction. The control board consists of 8-bit AD analog input channel (input 0~5V), 4-bit DA analog output channel (output 0~10V), 8-bit DI switch input channel, and 8-bit DO switch output channel. The power supply is 24VDC, one RS485 communication interface, and one RS232 communication interface, which can communicate and control with the lower computer.

[0091] The working principle is as follows: the adapter control system uses a single-chip control panel, equipped with a high-brightness LCD screen (with touch function) to display the operation interface, which is realized through special software. The control panel monitors the pressure parameters of the adapter in real time through the integrated AD analog input channel, monitors the oil filter status through the DI switch input channel, and displays the data on the operation interface after system data information processing. The user realizes human-computer interaction through the operation interface on the display screen, and the system performs data analysis through the interface operation instruction feedback, and then realizes the pressure / flow control through the DA analog output channel, and realizes the pressure regulation automatic / manual mode conversion through the DO switch output channel to control the intermediate relay, thereby realizing the conversion and regulation of the adapter output oil pressure and flow. During the operation of the equipment, the control system monitors the outlet pressure and the working status of the oil filter; when the oil filter element is blocked, it displays "Replace filter element" and flashes, and the user should replace the filter element in time; when the pressure reaches the specified upper limit, the equipment alarm prompts and stops supplying pressure.

[0092] Based on the above embodiments, the advantages of the oil dewatering device of the present invention are analyzed as follows:

[0093] 1. Reliability design

[0094] 1.1 The adapter uses the electromechanical and hydraulic integration technology controlled by a single-chip microcomputer, which is the company's mature technology; the selected devices are all brands used in the company's batch production products, of which more than 95% are mature devices used in the company's batch production products. The reliability of the main components used in the adapter can meet the requirements of reliability design.

[0095] 1.2 In the design, attention should be paid to the reliability design of the adapter, and reliability analysis and design should be carried out strictly, including reliability allocation, prediction, use of high-reliability components, redundancy design, derating design and mature technology design measures, and mature technology should be used for key components to ensure the reliability of the product.

[0096] 1.3 The adapter analyzes the common failure modes, weak links and factors affecting reliability of similar mature equipment of the company, and formulates corresponding measures for the weak links during the development of the adapter to improve product reliability.

[0097] 1.4 The adapter has a redundant design for key systems that affect product safety. A pressure transmitter is installed on the oil supply pipeline to monitor the system oil supply pressure. When the pressure exceeds the set value, the pressure supply is automatically stopped and the user is prompted.

[0098] The technologies of the 1.5 adapter are all mature product technologies and patents that the company has used in the field for many years.

[0099] 1.6 The adapter has intelligent control capabilities and is equipped with pressure transmitters, temperature transmitters, oil filter element alarm sensors, temperature, and oil filter status. When oil filter element blockage, system overpressure, overtemperature and other faults occur, the equipment will automatically stop supplying pressure and warn the user through the display screen.

[0100] 1.7 The structural design of the adapter adopts the structural design of the company's similar mature equipment. It has been used in the field for many years and has good reliability.

[0101] The 1.8 adapter body structure adopts the process of surface baking paint, the hydraulic conduit adopts aviation stainless steel conduit, and the pipe joints are processed with high-quality steel materials. The selected components can avoid damage and strength reduction caused by climate, corrosion, wear and other reasons.

[0102] 1.9 There is enough space for all the moving parts and relatively movable parts of the adapter, and the deformation of the structure will not affect its movement. Measures such as keeping at least 5mm gap between the conduits can effectively avoid wear and jamming between components.

[0103] 1.10 All detachable parts and interconnected non-moving structures of the adapter are connected by bolts, and anti-loosening measures are taken to ensure that the connection is firm and reliable.

[0104] 1.11 The adapter design avoids problems such as sudden stiffness changes, sharp corners, sharp edges, and low surface finish, reducing factors that may cause stress concentration.

[0105] 1.12 The adapter structure has sufficient clearance under static, thermal and dynamic conditions to prevent mechanical jamming, abrasion or other accidents.

[0106] 1.13 The door covers of the adapter bodies are equipped with water retaining lines and drainage points, and sealing strips are installed to prevent water accumulation and ice from hindering the operation of the mechanism.

[0107] 1.14 All seals of the adapter hydraulic system are made of nitrile rubber and fluororubber materials with good environmental adaptability to avoid leakage caused by reduced mechanical properties of the seals.

[0108] 1.15 The electrical system of the adapter has leakage protectors and circuit breakers for leakage, overcurrent and short circuit, and the selected power supply has overcurrent and over-voltage and under-voltage protection.

[0109] 1.16 The adapter instrument sensors are all installed inside the vehicle body.

[0110] 1.17 The adapter signal and power circuit grounding are independent loops, and provide effective shielding for the signal to avoid the influence of electromagnetic interference, or reduce its influence to an acceptable level, and protect personnel from electrical damage.

[0111] 2. Maintainability design

[0112] 2.1 Carry out maintainability design in accordance with the requirements of GJB 368B "General Requirements for Equipment Maintainability" and GJB Z91 "Maintenance Design Technical Manual", simplify and merge functions, eliminate unnecessary or even minor functions, combine the same or similar functions together, make products and maintenance operations, parts and components of the same model interchangeable, reduce devices as much as possible, and ensure the space required for maintenance in the device layout, facilitate the installation, disassembly and maintenance of the adapter, thereby reducing the maintenance content and difficulty; mechanical and electrical interfaces adopt error-proof measures, and the machine interface is marked to meet the ergonomic design for field use.

[0113] 2.2 The adapter has intelligent control capabilities and is equipped with fault alarm prompts such as oil filter element blockage, system overpressure, and overtemperature, which improves the accuracy and efficiency of fault detection and diagnosis.

[0114] 2.3 A leakage protector is installed in the electrical system to protect the circuit from short circuit, overcurrent, leakage and to cut off the power supply during maintenance, thus improving the safety of maintenance.

[0115] 2.4 The instruments and meters used during maintenance are all general instruments and tools are general tools.

[0116] 2.5 The parts used in the adapter require no or very little preventive maintenance to reduce the content and frequency of maintenance.

[0117] 2.6 Under the specified conditions of use, the adapter only needs to be repaired and repaired, and the performance parameters of the proportional pressure reducing valve and the like need to be adjusted. No major repair is required.

[0118] 2.7 The adapter identification plate is set in a position that is easy for maintenance personnel to observe. The identification is screen-printed and the plate is hung to ensure that it will not fall off or fade during the product renovation period.

[0119] The 2.8 adapter consists of four functional modules: body structure, pressure / flow control unit, power supply unit, and control and display unit.

[0120] 2.9 The adapter's regular parts are located on the operation panel or at the corresponding position with a movable door cover, which can be opened easily. The inspection points, test points, inspection windows, etc. are arranged in easily accessible positions.

[0121] 2.10 The switch of the adapter is arranged near the door cover and a movable door cover is provided at the corresponding position for good accessibility.

[0122] 2.11 Adapters are placed at different accessible locations based on the frequency of component failures, the difficulty of adjustment, and the weight of the components, to ensure that components with high failure frequencies and frequent preventive maintenance have good accessibility and provide necessary maintenance space.

[0123] 2.12 The vulnerable and irreparable parts of the adapter are all detachable assemblies, and use connectors that are easy to disassemble quickly (such as threaded installation and pipe joint installation) to facilitate quick replacement and repair.

[0124] 2.13 Parts and components of the same model and function of the adapter are interchangeable.

[0125] 2.14 The adapter adopts standardized design and uses standardized equipment, accessories and parts. Standard components and parts are used. If there are no suitable standard parts for the time being, non-standard parts can be designed according to the standard parts interface to provide conditions for the use of standard parts in the future.

[0126] 2.15 Adapters For operating adapters with fixed operating procedures, there are markings on the operating sequence number and the direction of movement (such as the direction of the switch, the direction of the voltage regulating knob, etc.).

[0127] 2.16 The adapter adopts error-proof design to ensure the correct installation of directional accessories and to ensure that accessories with similar appearance but different functions cannot be installed in series.

[0128] 2.17 The adapter should indicate the flow direction on the fluid accessories (such as one-way valves, safety valves, etc.) to prevent reverse installation.

[0129] 2.18 The adapter adopts error-proof design to ensure that important equipment or parts cannot be installed in the wrong place.

[0130] 2.19 The adapter adopts error-proof design to prevent errors during connection and assembly. Even if an operational error occurs, it can be discovered immediately to avoid consequences such as damage to the device and accidents.

[0131] 2.20 The electrical, hydraulic, mechanical and other connections of the adjacent products of the adapter are equipped with physical error-proofing measures to prevent the two from being interchanged or installed incorrectly.

[0132] 2.21 The adapter oil filter and filter element can be easily disassembled and assembled without draining the oil in the system and tank.

[0133] 2.22 The operation interface is equipped with a help button with built-in operating procedures, precautions and methods for troubleshooting common faults, so that the operator can get help at any time; when the operator is working, there will be prompts for each step to prompt the user to operate and confirm, and repeated confirmation is required before important instructions are entered; with reference to ergonomic design, the operation design is simplified to minimize the operator's workload, facilitate the operation of the user, and provide sufficiently clear and explicit prompts during the operation, so as to reduce the requirements for operator skills as much as possible.

[0134] 3. Testability Design

[0135] 3.1 Carry out product testability design and analysis in accordance with GJB 2547-2012 "General Requirements for Equipment Testability Failures" and GJB 5188-2003 "General Technical Requirements for Aircraft Ground Automatic Test Equipment".

[0136] 3.2 The adapter has relatively complete in-machine testing technology, with startup self-detection function, completing self-confidence test, fault isolation and verification test.

[0137] 3.3 The adapter adopts a single-chip microcomputer control system, and the pressure, temperature, and oil filter status monitoring display are set in the system. When the oil filter is blocked and the system's working pressure and temperature exceed the set value, the equipment will shut down and warn the user.

[0138] 3.4 The adapter has power over / under voltage, over current, phase loss and leakage protection prompt functions.

[0139] 3.5 The types and number of inspection points should be able to meet the needs of repair organizations at all levels. Their layout should be conducive to testing, as centralized or zoned as possible, and with good accessibility.

[0140] 3.6 The selection of test points should be based on the principle of in-situ testing and their arrangement should be conducive to testing in a logical sequence.

[0141] 3.7 The markings of the inspection points should be eye-catching, and nameplates and silk-screen logos should be used as markings.

[0142] 3.8 The adapter has a software and hardware interface to facilitate regular inspection and on-site calibration of the equipment; all transmitters used are located in convenient locations for disassembly and assembly, making them easy to disassemble for inspection or calibration.

[0143] 4. Security design

[0144] 4.1 The adapter design provides maximum safety and convenience for the installation, disassembly, transportation, maintenance, operation, storage and custody of the equipment, in accordance with the relevant provisions of GJB 900A "General Requirements for Equipment Safety Work" and in combination with Section 5.13 of GJB2873-1997 "Ergonomic Design Guidelines for Military Equipment and Facilities".

[0145] 4.2 Security Design

[0146] In order to achieve the goal of equipment safety design, and combined with the specific conditions of the equipment, referring to the relevant provisions of GJB 900A, the equipment adopts safety design, which is divided into mechanical system safety design, electrical control system safety design, power supply protection, error prevention, software safety design, etc., to avoid unacceptable risks of accidents.

[0147] 4.2.1 Mechanical system safety design reduces the potential safety hazards to equipment operators, maintenance personnel and protected objects caused by mechanical failures through material selection, structural design, joint connection design, and operation control design. Measures include:

[0148] a) Select high-quality processing materials to ensure the strength, stability and safety of the equipment structure;

[0149] b) Error-proof and safety design of mechanical joints;

[0150] c) The control operation design is easy to use, with operation step prompts and a design to prevent misoperation;

[0151] d) The sharp edges of the adapter are rounded to prevent scratches and bumps;

[0152] e) All moving parts are protected to prevent injuries caused by misoperation.

[0153] 4.2.2 Safety design of electrical control system The safety hazards caused by electrical failures to equipment operators, maintenance personnel and protected objects are reduced by combining grounding and automatic protection of the electrical characteristics of the equipment. The measures include:

[0154] a) All metal parts, panels, control boxes and shielding layers of the equipment are reliably grounded under normal working conditions. A grounding wire is set at the rear of the vehicle body and marked with a grounding mark;

[0155] b) The equipment uses standard 220V single-phase AC power and a three-wire electrical connection in the power supply circuit, that is, in addition to the working zero, a protective neutral line is also set, and the vehicle casing is grounded to prevent safety issues such as leakage. The leakage protector used in the electrical system has short-circuit, over-current, and leakage automatic tripping protection functions to prevent chain reaction failures of components.

[0156] 4.2.3 Power supply protection design measures include:

[0157] a) The power supply should be an industrial-grade switching power supply with overvoltage and overcurrent protection functions. At the same time, it has shielding measures to prevent electromagnetic radiation and other functions to ensure that the safety of the equipment itself will not be affected when the external power supply is abnormal;

[0158] b) When an electrical plug (socket) with a design to prevent mis-insertion is separated, the pins are not electrically charged.

[0159] 4.2.4 Error-proofing design reduces potential safety hazards caused by human error through unique interface design with obvious signs. Measures include:

[0160] a) Fully consider the selection and installation position of the connector to avoid installation errors;

[0161] b) Each module of the equipment is clearly marked to prevent incorrect installation.

[0162] 4.2.5 Software security design measures include:

[0163] a) Use safe and reliable data backup to prevent user data loss.

[0164] 4.2.6 Pressure transmitters and temperature sensors are installed in the hydraulic system of the equipment to monitor the system working pressure and oil temperature. When the pressure and oil temperature are greater than the set value, a stop alarm is issued to prevent damage to the aircraft hydraulic system components.

[0165] 4.2.7 Safety valves are installed in the oil supply, oil return and oil filling pipelines of the equipment's hydraulic system to protect the system pressure and prevent damage to the aircraft hydraulic system components.

[0166] 4.2.8 Equipment and machinery that seriously endanger safety are equipped with automatic fault protection measures to prevent a failure or damage to a machine or equipment that may cause harm to personnel or damage to other equipment and machinery. Systems and machinery that are likely to cause serious consequences if damaged, such as proportional valves and certain other critical equipment and systems, are located in locations that are not easily damaged.

[0167] 4.2.9 The adapter hydraulic system is equipped with a high-precision oil filter and self-cleaning measures to ensure that the aircraft hydraulic system is not contaminated.

[0168] 4.2.10 has an oil filter blockage alarm. When the oil filter element is blocked, the equipment stops and an alarm sounds. The display prompts the user, "XX oil filter element is blocked. Please replace XX oil filter element." At the same time, the oil filter status bar displays "Replace filter element XX" and flashes red.

[0169] 4.2.11 The equipment adopts a single-chip microcomputer-controlled configuration Chinese interface to monitor the equipment's operating status (pressure, temperature, oil tank level, oil filter element status) in real time. The design is user-friendly and is equipped with operation buttons, function selections, digital displays, and alarm indications. Each step of the operation has corresponding operation prompts. When the pressure and temperature reach the alarm value, the equipment will automatically protect the stop alarm prompt.

[0170] 4.2.12 The operation panel is equipped with an emergency stop button. When a sudden failure occurs in the equipment, press the emergency button and the equipment will stop running immediately to prevent damage to the equipment and the aircraft hydraulic system.

[0171] 4.2.13 Adapters isolate hazardous items, parts, and operations from other operations, areas, personnel, and materials.

[0172] 4.2.14 Potentially dangerous parts of the adapter are marked with eye-catching marks, symbols and text warnings, such as the silk-screen high voltage danger mark on the electrical control part, to prevent accidents and endanger the safety of personnel and equipment.

[0173] 4.2.15 The equipment's "Operation and Maintenance Manual" and "Simple Operation Methods and Precautions" shall specify the requirements for regular inspection and cleaning of the oil of the equipment. At the same time, the "Operation and Maintenance Manual" shall specify the specific requirements for oil testing and put forward safety-related precautions.

[0174] 4.2.16 All safety-related parts shall be listed as precautions in the equipment's "Operation and Maintenance Manual" and "Simple Operation Methods and Precautions".

[0175] 4.2.17 Safety operation warning signs and operation procedure instruction plates shall be placed in obvious locations to remind operators to follow the prescribed procedures.

[0176] 5. Security design

[0177] 5.1 According to the requirements of the adapter design support work, the ability to perform tasks without failure and the ability to quickly repair are emphasized. From the beginning of the design of this adapter, the emphasis is on carrying out comprehensive support work, and support is taken as a design consideration that is equally important as performance, schedule and cost. It is emphasized that comprehensive support work must be carried out to influence product design, and an optimized comprehensive support plan is formulated through comprehensive support activities of support analysis to reduce the use and support costs of the adapter.

[0178] 5.2 Common tools, instruments, meters and equipment are used for adapter inspection and maintenance.

[0179] 5.3 The adapter uses an 8″ high brightness, wide temperature LCD display with touch function to display the operation interface, which can be clearly seen in strong and weak light. It uses temperature transmitters and pressure transmitters to monitor the temperature and pressure of the system, which can be displayed in real time on the operation interface.

[0180] 5.4 The docking interface between the adapter and the aircraft hydraulic system can be connected quickly, easily, safely, reliably and accurately.

[0181] 5.5 The equipment can be measured using standard measuring instruments commonly used in the market, and there is no need to develop special measuring equipment. The pressure and temperature sensors used in the equipment are sent to a third-party metrology technical organization recognized by the state, defense or military for calibration before leaving the factory, and the calibration certificate issued is delivered with the equipment, and the measurement confirmation mark is made to indicate that it meets the use requirements. The measurement method and precautions of the equipment sensor will be clearly stated in the use and maintenance instructions delivered with the equipment when the equipment is delivered.

[0182] 5.6 Security Information

[0183] Prepare and provide operating and maintenance instructions, packing lists, certificates of conformity (record book), spare parts lists, etc.

[0184] 5.7 Technical Training

[0185] After the equipment is delivered to the user, professional technicians are arranged to go to the site to provide comprehensive technical training to the operators on equipment installation, integrated debugging, working principles, operating methods, troubleshooting analysis, troubleshooting methods, daily equipment maintenance and precautions.

[0186] 5.8 Product accessories

[0187] Prepare a list of accessories and identify the tools and accessories that come with the machine.

[0188] 5.9 Technical Services

[0189] The equipment is installed with a sign indicating the equipment name, model and specifications, factory number, manufacturer, and production time, and the equipment name, model and specifications are consistent with the contract.

[0190] The company has a perfect after-sales service system, and the warranty period is 3 years after acceptance. Lifelong maintenance services are provided to ensure the provision of spare parts. Spare parts and technical support are provided after the warranty period, and the fees are charged at cost price. The company has a perfect after-sales service system, providing users with 7×24 hours technical support and services. After the equipment fails, it will respond within 2 hours and arrange technicians to repair it on site within 2 working days.

[0191] 6. Environmental adaptability

[0192] 6.1 Low temperature

[0193] Low temperature environment is taken into consideration in structural design and component selection. The selected components are currently used in other mature products. Automatic heating control is set for components with poor low temperature adaptability (such as display screens) to improve their low temperature adaptability. Similar products have been subjected to low temperature storage and working tests in accordance with the requirements of GJB150.4A-2009 "Military Equipment Laboratory Environmental Test Methods Part 4: Low Temperature Test", so it can be ensured that the equipment can perform normally under the environmental conditions of the specified low temperature storage temperature (-55°C) and can work normally under the environmental conditions of the low temperature working temperature (-40°C).

[0194] 6.2 High temperature

[0195] High temperature environment has been taken into consideration in structural design and component selection. The selected components are currently used in other mature products. Cooling fans are provided for components with high heat generation to improve their high temperature adaptability. Similar products have been subjected to high temperature storage and working tests in accordance with the requirements of GJB150.3A-2009 "Military Equipment Laboratory Environmental Test Method Part 3: High Temperature Test", so it can be ensured that the equipment can perform normally under the environmental conditions of the specified high temperature storage temperature (+70°C) and can work normally under the environmental conditions of the high temperature working temperature (+55°C).

[0196] 6.3 Damp Heat

[0197] The damp and hot environment is taken into consideration in the structural design and component selection to ensure that the components and structural parts do not produce plastic deformation at low temperatures. The equipment has a good temperature control system to ensure that the equipment can be used normally at high temperatures. Similar products have been subjected to damp and hot tests in accordance with the requirements of GJB150.9A-2009 "Military Equipment Laboratory Environmental Test Method Part 9: Damp and Hot Test", so it can be ensured that the adapter can work normally in an environment with a relative humidity of no more than 95%.

[0198] 6.4 Mold

[0199] During the equipment design process, anti-mildew design was taken into consideration. The chamfering process was used in the structural design to avoid the formation of dead corners. The surface treatment adopted the wear-resistant baking varnish process to improve its mildew resistance. Mildew-resistant electrical components were selected and subjected to "three-proof" treatment. Similar products have been subjected to mildew tests in accordance with the requirements of GJB150.10A-2009 "Military Equipment Laboratory Environmental Test Method Part 10: Mildew Test", so it can be ensured that the adapter can withstand mildew erosion of a level not inferior to level 2, will not cause physical damage, and can work normally.

[0200] 6.5 Salt spray

[0201] The surface of the vehicle body is painted with wear-resistant paint to enhance the ability of corrosion and salt spray resistance. Electrical components resistant to salt spray corrosion are selected and have undergone "three-proof" treatment. Similar products have been subjected to salt spray tests according to the requirements of GJB150.11A-2009 "Military Equipment Laboratory Environmental Test Method Part 11: Salt Spray Test", so it can ensure that the adapter can be used normally in a salt spray environment.

[0202] 6.6 Transport vibration

[0203] The vibration environment is taken into consideration in the design. Shock-absorbing mechanisms are installed between the front and rear wheels and the vehicle body. Shock-absorbing measures are taken for the main components of the equipment. Anti-loosening measures such as anti-loosening nuts are used for fasteners and cotter pins are added to movable parts. Similar products have been tested in accordance with the requirements of GJB150.16A-2009 "Military Equipment Laboratory Environmental Test Method Part 16: Vibration Test", so it can be ensured that the adapter can withstand the vibration environment induced during transportation by road, rail, water, aviation, etc.

[0204] 6.7 Rain

[0205] The whole vehicle adopts a box-type internal mechanical structure. The upper cover of the vehicle body, the dust cover of the display screen and each door cover are equipped with water blocking lines and sealing strips. At the same time, a protective cover used in non-working periods is configured to protect the whole machine when it is not working, so that the whole vehicle has good rainproof ability. The surface of the vehicle body adopts wear-resistant paint, and the adapter can withstand rainfall intensity and work normally under the ground rainfall intensity of 1.7mm / min.

[0206] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and intent of the present invention.

Claims

1. A hydraulic universal adapter for drones, characterized by: It includes a pressure / flow control unit and a control unit and a power supply unit connected thereto; the pressure / flow control unit is connected between an external hydraulic source and a hydraulic system of a UAV, and the control unit controls and adjusts the output pressure / flow of the external hydraulic source, and then outputs hydraulic energy that meets the requirements of the hydraulic system of the aircraft, thereby being able to complete the pressure supply or refueling of the hydraulic system of the aircraft; The control unit controls the working parameters of the pressure / flow control unit based on the pressure / flow parameter requirements of the aircraft hydraulic system; The power supply unit is used to supply power to the pressure / flow control unit and the control unit.

2. The hydraulic universal adapter for unmanned aerial vehicles according to claim 1, characterized in that: The pressure / flow control unit comprises a pressure supply pipeline, an oil return pipeline and a refueling pipeline; the oil from the external hydraulic source is input into the aircraft hydraulic system through the pressure supply pipeline, the oil in the aircraft hydraulic system oil tank is sucked back to the external hydraulic source through the oil return pipeline, and the oil input from the external hydraulic source enters the aircraft hydraulic oil tank through the aircraft refueling port through the refueling pipeline.

3. The hydraulic universal adapter for unmanned aerial vehicles according to claim 2, characterized in that: The pressure supply pipeline is connected with the pressure supply transfer valve, quick connector, proportional pressure reducing valve, proportional flow valve, buffer valve, pressure transmitter, oil filter, stop valve, pressure supply hose, quick connector and pressure supply valve in sequence along the pipeline; the oil enters the pressure supply pipeline from the external hydraulic source through the pressure supply transfer valve, is output from the pressure supply valve to the aircraft pressure supply valve and enters the aircraft hydraulic system, and a safety valve and a pressure regulating / pressure relief valve are arranged on the oil supply pipeline.

4. The hydraulic universal adapter for unmanned aerial vehicles according to claim 3, characterized in that: The return oil pipeline is connected in sequence along the pipeline with an oil suction valve, a quick connector, an adapter return oil hose, a one-way valve, a water removal multi-way module, a temperature sensor, a quick connector, and an oil return transfer valve. The oil enters the return oil pipeline from the aircraft hydraulic system through the oil suction valve, is output from the return oil pipeline to the return oil transfer valve and enters the external hydraulic source. A sampling valve and a safety valve are provided on the return oil pipeline.

5. The hydraulic universal adapter for unmanned aerial vehicles according to claim 4, characterized in that: The refueling pipeline is connected with a pressure supply transfer valve, a quick connector, a proportional pressure reducing valve, a proportional flow valve, a buffer valve, a pressure transmitter, an oil filter, a solenoid valve, a refueling hose, a quick connector, and a refueling valve / connector in sequence along the pipeline; the oil enters the refueling pipeline from an external hydraulic source through the pressure supply transfer valve, is output from the refueling pipeline to the refueling valve / connector, and enters the aircraft hydraulic oil tank through the aircraft refueling port. A safety valve and a pressure regulating / relieving valve are provided on the refueling pipeline; the pressure supply transfer valve, the quick connector, the proportional pressure reducing valve, the proportional flow valve, the buffer valve, the pressure transmitter, and the oil filter are shared with the pressure supply pipeline.

6. The hydraulic universal adapter for unmanned aerial vehicles according to claim 5, characterized in that: The pressure / flow control unit also includes an oil dehydration device, which includes a refueling hose, a refueling filter, a refueling stop valve, a manual reversing valve, a gear pump, a motor, a check valve, an oil supply filter, a pressure transmitter, a temperature transmitter, a pressure regulating stop valve, a sampling valve, a safety valve, an oil supply hose, a first quick connector, a second quick connector, an oil return hose, a flow regulating valve, a coarse air filter, a fine air filter, a purification tank, a differential pressure sensor, an absolute pressure sensor, a transparent hose, an oil-water separator, a vacuum pump, and a back pressure valve; the first quick connector and the second quick connector are respectively connected to the hydraulic universal adapter After the water removal multi-channel module is connected, the reversing valve is switched to the circulation position, the motor and the vacuum pump are started, and the oil in the hydraulic universal adapter passes through the first quick connector, the oil return hose, and the back pressure valve, and enters the purification tank. From the purification tank, the oil flows through the reversing valve, is pumped out by the gear pump, and passes through the one-way valve, oil filter, pressure transmitter, temperature transmitter, pressure regulating stop valve, sampling valve, safety valve, oil supply hose, and the second quick connector, and returns to the hydraulic system of the hydraulic universal adapter; at the same time, the vacuum pump is started, and the gas enters the purification tank through the flow control valve, the coarse air filter, and the fine air filter, and then is discharged through the oil-water separator and the vacuum pump; When refueling the purification tank, after the refueling hose is extended into the oil barrel, the reversing valve is switched to the refueling position, the refueling stop valve and the pressure regulating stop valve are opened, and the motor is started to drive the oil pump to run. The oil enters the purification tank through the refueling hose, the refueling oil filter, the refueling stop valve, the reversing valve, the gear pump, the one-way valve, the oil filter, the pressure transmitter, the temperature transmitter, and the pressure regulating stop valve. When the oil level in the purification tank reaches the set value, the device automatically stops running and prompts that the refueling is completed.

7. The hydraulic universal adapter for unmanned aerial vehicles according to claim 6, characterized in that: The control unit includes a control panel and a display operation interface. The control panel monitors the pressure parameters of the adapter in real time through the integrated AD analog input channel, monitors the oil filter status through the DI switch input channel, and displays the data on the operation interface after system data information processing; The user realizes human-computer interaction through the operation interface on the display screen. The system performs data analysis through the interface operation instruction feedback, and then realizes pressure / flow control through the DA analog output channel. The intermediate relay is controlled through the DO switch output channel to realize the automatic / manual mode conversion of pressure regulation, thereby realizing the conversion and regulation of the adapter output oil pressure and flow.

8. The hydraulic universal adapter for unmanned aerial vehicles according to claim 7, characterized in that: The power supply unit is AC220V / 50Hz, including a leakage protector, a relay, a switching power supply, and a power cable. The power supply has overcurrent, leakage, over-voltage, under-voltage, and short-circuit protection prompts; The leakage protector is used for overcurrent and leakage protection of the main power supply circuit and as a switch to cut off the power supply during maintenance. It is selected as 2-pole 2A and leakage current 30mA; The relay is used for system power switch and automatic / manual conversion of pressure regulation; The switching power supply is used to power the control panel, sensor, solenoid valve, and relay, with an output power of 200W, an input voltage range of 175V to 264V, 50Hz / 60Hz, and shielding measures to prevent electromagnetic radiation from interfering with the control system; The power cable is used for external power supply and adopts three-core cable, 3×1.0mm 2 , length is 20m.

9. A method for testing / cleaning a drone using the drone hydraulic universal adapter according to any one of claims 1 to 8, characterized in that The specific steps are as follows: Connecting the input end of the pressure supply pipeline to an external hydraulic source, and connecting the output end to an aircraft hydraulic system; The input end of the oil return pipeline is connected to the aircraft hydraulic system, and the output end is connected to an external hydraulic source; The oil is output from the external hydraulic source, passes through the pressure supply transfer valve, quick connector, proportional pressure reducing valve, proportional flow valve, buffer valve, pressure transmitter, oil filter, stop valve, pressure supply hose, quick connector, pressure supply valve to the aircraft pressure supply valve, and enters the aircraft hydraulic system; The oil flows from the oil tank suction interface of the aircraft hydraulic system through the oil suction valve, quick connector, and enters the adapter oil return hose, check valve, water removal multi-way module, temperature sensor, quick connector, oil return transfer valve, and then the oil returns to the external hydraulic source through the oil suction hose; The oil converts and controls the hydraulic energy provided by the external hydraulic source through the oil supply pipeline and the oil return pipeline, completes the pressure supply test of the flight control actuator and the landing gear retraction and extension load, and cleans the on-board hydraulic system or local pipelines to remove solid particle contaminants in the hydraulic system.

10. A method for refueling a drone using the drone hydraulic universal adapter according to any one of claims 1 to 8, characterized in that The specific steps are as follows: Connecting the input end of the refueling pipeline to an external hydraulic source, and connecting the output end to the aircraft hydraulic system; The oil is output from the external hydraulic source, through the pressure supply transfer valve, quick connector, proportional pressure reducing valve, proportional flow valve, buffer valve, pressure transmitter, oil filter, solenoid valve, refueling hose, quick connector, refueling valve / connector to the aircraft refueling port and enters the aircraft hydraulic oil tank; The working medium is converted and controlled by the external hydraulic source through the refueling pipeline to pressure-refuel the hydraulic system tank on the machine.

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