Universal hydraulic adapter for unmanned aerial vehicle

Abstract

The utility model discloses a hydraulic universal adapter for an unmanned aerial vehicle, and belongs to the technical field of hydraulic adapters. Comprising a pressure / flow control unit, a control unit connected with the pressure / flow control unit and a power supply unit, and all the units are carried on a vehicle body structure; the pressure / flow control unit is connected between an external hydraulic source and an unmanned aerial vehicle hydraulic system and comprises a pressure supply pipeline, an oil return pipeline and an oil filling pipeline. The pressure supply pipeline is used for inputting oil of an external hydraulic source into the aircraft hydraulic system, the oil return pipeline is used for sucking oil in an oil tank of the aircraft hydraulic system back to the external hydraulic source, and the oil filling pipeline is used for enabling the oil input by the external hydraulic source to enter the aircraft hydraulic oil tank through an aircraft oil filling port; the control unit comprises a control panel and a display operation interface; and the power supply unit is used for supplying power to the pressure / flow control unit and the control unit. According to the utility model, the generalization guarantee of various airplane hydraulic systems is realized.

Description

TECHNICAL FIELD

[0001] The utility model belongs to hydraulic adapter technical field, concretely relates to a general adapter of unmanned aerial vehicle hydraulic pressure. BACKGROUND

[0002] The hydraulic system of large and medium manned aircraft and unmanned aerial vehicle equipment needs to obtain support from the field station hydraulic equipment, but the hydraulic system parameters of different aircraft models are different, resulting in various relationships between pressure and flow. Currently, when maintaining large and medium manned aircraft and unmanned aerial vehicle equipment, workers need to manually adjust the equipment to output appropriate flow and pressure values. Errors or mistakes are likely to occur during manual adjustment, affecting the maintenance efficiency of large and medium manned aircraft and unmanned aerial vehicle equipment. SUMMARY

[0003] The technical problem to be solved is:

[0004] To avoid the shortcomings of the prior art, the utility model provides a general adapter of unmanned aerial vehicle hydraulic pressure. The adapter is connected with existing field station hydraulic equipment and the hydraulic interface of large and medium manned aircraft and unmanned aerial vehicle equipment. It controls and converts the pressure and flow output by the hydraulic equipment into corresponding working parameter values of the hydraulic system of multiple aircraft models. Combined with the corresponding aircraft model hydraulic connector, it realizes the generalization of the hydraulic system of multiple aircraft models.

[0005] The technical scheme of the utility model is: a general adapter of unmanned aerial vehicle hydraulic pressure, which comprises a pressure / flow control unit, a control unit connected with the pressure / flow control unit, and a power supply unit. Each unit is mounted on a vehicle body structure.

[0006] The pressure / flow control unit is connected between an external hydraulic source and the hydraulic system of the unmanned aerial vehicle. It comprises a pressure supply pipeline, an oil return pipeline, and an oil filling pipeline. The pressure supply pipeline is used to input oil from the external hydraulic source to the aircraft hydraulic system. The oil return pipeline is used to suck oil from the aircraft hydraulic system tank back to the external hydraulic source. The oil filling pipeline is used to input oil from the external hydraulic source into the aircraft hydraulic tank through the aircraft oil filling port.

[0007] The control unit comprises a control panel and a display operation interface.

[0008] The power supply unit is used to supply power to the pressure / flow control unit and the control unit.

[0009] The further technical scheme of the utility model is: the pressure supply pipeline is connected in sequence along the pipeline with a pressure supply switching 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. Oil from the external hydraulic source enters the pressure supply pipeline through the pressure supply switching valve and is output from the pressure supply valve to the aircraft pressure supply valve to enter the aircraft hydraulic system. A safety valve and a pressure regulating / relief valve are provided on the oil supply pipeline.

[0010] The further technical scheme of the utility model is: the oil return pipeline is connected with oil suction valve, quick coupling, entering adapter oil return hose, check valve, water removal multi-pass module, temperature sensor, quick coupling, oil return switching valve in turn along the pipeline, oil liquid enters oil return pipeline from aircraft hydraulic system through oil suction valve, and is output from oil return pipeline to oil return switching valve to enter external hydraulic source, sampling valve and safety valve are arranged on oil return pipeline.

[0011] The further technical scheme of the utility model is: the oil return pipeline is connected with oil suction valve, quick coupling, entering adapter oil return hose, check valve, water removal multi-pass module, temperature sensor, quick coupling, oil return switching valve in turn along the pipeline, oil liquid enters oil return pipeline from aircraft hydraulic system through oil suction valve, and is output from oil return pipeline to oil return switching valve to enter external hydraulic source, sampling valve and safety valve are arranged on oil return pipeline.

[0012] The further technical scheme of the utility model is: the pressure / flow control unit still includes oil liquid water removal device, the oil liquid water removal device includes oil filling hose, oil filling oil filter, oil filling stop valve, hand-operated reversing valve, gear pump, motor, check valve, oil supply oil filter, pressure transmitter, temperature transmitter, pressure regulating stop valve, sampling valve, safety valve, oil supply hose, first quick coupling, second quick coupling, oil return hose, flow regulating valve, air filter coarse, air filter fine, purification tank, differential pressure sensor, absolute pressure sensor, transparent hose, oil-water separator, vacuum pump, back pressure valve;After connecting first quick coupling and second quick coupling with water removal multi-pass module of hydraulic universal adapter respectively, then switching reversing valve to circulation position, starting motor and vacuum pump, oil liquid in hydraulic universal adapter passes first quick coupling, oil return hose, back pressure valve, enters purification tank, flows from purification tank through reversing valve, is extracted by gear pump, passes check valve, oil filter, pressure transmitter, temperature transmitter, pressure regulating stop valve, sampling valve, safety valve, oil supply hose, second quick coupling, and returns to hydraulic system in hydraulic universal adapter;

[0013] When the purification tank is refueled, the refueling hose is inserted into the oil drum, then the reversing valve is switched to the refueling position, the refueling stop valve and the pressure regulating stop valve are opened, the motor is started to drive the oil pump to operate, and the oil liquid 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.

[0014] The further technical scheme of the utility model is: the control board in the control unit is composed of 8 AD analog input channels, 4 DA analog output channels, 8 DI switch quantity input channels and 8 DO switch quantity output channels.

[0015] The further technical scheme of the utility model is: the power supply unit is AC220V / 50Hz, including the leakage protector, the relay, the switching power supply and the power cable, the power supply has overcurrent, leakage, over / 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 is used as a switch to cut off the power supply during maintenance, is selected as 2-pole 2A and has a leakage current of 30mA;

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

[0018] The switching power supply is used for power supply of the control board, the sensor, the electromagnetic valve and the relay, has an output power of 200W, an input voltage range of 175V-264V and a frequency of 50Hz / 60Hz;

[0019] The power cable is used for external power supply, adopts a three-core cable, is 3x1.0mm 2 in length and is 20m long.

[0020] The further technical scheme of the utility model is: the vehicle body structure includes a vehicle frame and wheels installed at the bottom of the vehicle frame, the vehicle frame is a hollow box body, and the pressure / flow control unit, the control unit and the power supply unit are installed in the vehicle frame.

[0021] The further technical scheme of the utility model is: the vehicle frame side wall is provided with heat dissipation fins, and the display operation interface is installed on the top surface.

[0022] The further technical scheme of the utility model is: the wheels include three steering wheels distributed in a triangular shape, one of which is used as a front wheel and has a 360° steering function with a brake function, and the other two are used as rear wheels.

[0023] Advantages

[0024] The beneficial effects of this utility model are as follows: After the adapter of this utility model is connected in series with the external hydraulic source, the external hydraulic source is connected to the hydraulic system of the UAV through the pressure / flow control unit, which replaces the onboard hydraulic pump to supply pressure to the onboard hydraulic system, so as to realize the ground test, airtightness inspection, cleaning and hydraulic oil tank filling of the onboard hydraulic system.

[0025] This invention integrates a pressure / flow control unit, a control unit, and a power supply unit onto the vehicle body structure, enabling pressure supply to the onboard hydraulic system in outdoor environments.

[0026] This utility model adapter is equipped with oil supply / return lines and a refueling line, achieving universal protection for hydraulic systems of different models. It has a simple structure, facilitating transportation, maintenance, and disassembly. Attached Figure Description

[0027] Figure 1 Block diagram of the working principle of the universal hydraulic adapter for unmanned aerial vehicles in this embodiment of the utility model;

[0028] Figure 2 A schematic diagram of the system composition of the universal hydraulic adapter for unmanned aerial vehicles in this embodiment of the present invention;

[0029] Figure 3 A schematic diagram of the vehicle body structure of the universal hydraulic adapter for unmanned aerial vehicles in this embodiment of the present invention;

[0030] Figure 4 Hydraulic schematic diagram of the UAV hydraulic universal adapter for online testing / online cleaning in this embodiment of the utility model;

[0031] Figure 5 A schematic diagram of the pressure transfer valve of the universal hydraulic adapter for unmanned aerial vehicles in this embodiment of the present invention;

[0032] Figure 6 A schematic diagram of the return oil transfer valve of the universal hydraulic adapter for unmanned aerial vehicles in this embodiment of the present invention;

[0033] Figure 7 This utility model embodiment shows the working principle diagram of the universal hydraulic adapter for drones refueling aircraft hydraulic oil tanks.

[0034] Figure 8 This utility model embodiment shows the principle diagram of vacuum dehydration in conjunction with the oil dehydration device of the universal hydraulic adapter for unmanned aerial vehicles.

[0035] Figure 9 Electrical schematic diagram of the universal hydraulic adapter for unmanned aerial vehicles in this embodiment of the present invention;

[0036] Figure 10 This utility model embodiment shows the main interface of the universal hydraulic adapter for unmanned aerial vehicles.

[0037] BRIEF DESCRIPTION OF DRAWINGS 1. Quick coupling, 2. Pressure supply switching valve, 2-1. Quick coupling, 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. Oil filling hose, 11. Pressure supply hose, 12. Quick coupling, 13. Pressure supply valve, 14. Oil suction valve, 15. Quick coupling, 16. Inlet adapter return oil hose, 17. Safety valve, 18. Check valve, 19. Sampling valve, 20. Temperature sensor, 21. Quick coupling, 22. Return oil switching valve, 22-1. Quick coupling, 22-2. YXF-184 valve; 23. Safety valve, 24. Pressure regulating / relief valve, 25. Safety valve, 26. Quick coupling, 27. Oil filling valve / joint, 28. Self-circulation interface, 29. Water removal multi-channel module, 30. Quick coupling, 31. Quick coupling; 32. Pressure / flow control unit, 33. Power supply unit, 34. Control unit, 35. Vehicle body structure; 41. Oil filling hose, 42. Oil filling filter, 43. Oil filling stop valve, 44. Manual diverter valve, 45. Gear pump, 46. Motor, 47. Check valve, 48. Oil supply filter, 49. Pressure transmitter, 50. Temperature transmitter, 51. Pressure regulating stop valve, 52. Sampling valve, 53. Safety valve, 54. Oil supply hose, 55. First quick coupling, 56. Second quick coupling, 57. Return oil hose, 58. Flow regulating 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

[0038] The embodiments described below are exemplary and are intended to explain the present application, and are not to be understood as limiting the present application.

[0039] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0040] Based on the current staff in the maintenance of large and medium-sized manned aircraft, unmanned aircraft equipment, all need manual adjustment equipment, output to the appropriate flow and pressure value, in the manual adjustment error or mistake, affect the maintenance efficiency of large and medium-sized manned aircraft, unmanned aircraft equipment and other problems, the utility model provides including pressure / flow control unit and with its connection control unit, power supply unit, each unit is carried on the vehicle body structure;The pressure / flow control unit is connected between the external hydraulic source and the unmanned aerial vehicle hydraulic system, including pressure supply pipeline, oil return pipeline and oil filling pipeline;The pressure supply pipeline is used for inputting the oil of the external hydraulic source to the aircraft hydraulic system, the oil return pipeline is used for sucking the oil in the aircraft hydraulic system oil tank back to the external hydraulic source, and the oil filling pipeline is used for inputting the oil of the external hydraulic source into the aircraft hydraulic oil tank through the aircraft oil filling port;The control unit comprises a control panel and a display operation interface;The power supply unit is used for power supply to the pressure / flow control unit and the control unit.

[0041] The above technical solutions are further described in combination with the drawings and examples:

[0042] In the embodiment, the adapter is connected with the existing field station hydraulic equipment, the hydraulic interface of large and medium-sized manned aircraft and unmanned aircraft equipment, controls the pressure and flow output by the hydraulic equipment, and converts them into corresponding working parameter values of the four aircraft hydraulic system, in combination with the corresponding aircraft type hydraulic connector, realizes the generalization of the four aircraft hydraulic system. The adapter is matched with the AC-B / YLC-1 traction type hydraulic oil pump vehicle four and is matched with the CB-B / YLC-3A traction type hydraulic oil pump vehicle four, which has been used in the field for 8 years and 7 years respectively, and is a mature technology. The machine, electrical and hydraulic integrated technology controlled by the single-chip microcomputer automatically configures the working mode of the corresponding working parameters under the support of the special software, realizes the generalization, miniaturization and intelligentization of the equipment.

[0043] Main technical indicators: working medium: suitable for aviation hydraulic oil No. 15 (GJB1177A-2013), YH-10 (SY1181-1976) and the like. Working pressure: (0-22) MPa, manually adjustable, the following is the preset pressure according to the aircraft type: 21+0.7-0.3MPa;(21.3±0.5)MPa;16+0.7-0.3MPa;21 +-1 0.5MPa. Working flow rate: (0~50) L / min. Oil filling pressure: (0~0.5) MPa, manually adjustable. Oil contamination index: the solid particle contamination of the hydraulic system at the factory shall not be worse than GJB420B-6 level. The safety valve is arranged on the adapter of the oil supply and return pipeline to ensure the safety of the aircraft oil supply and return system. The adapter is matched with the oil supply pipeline, oil return pipeline and oil filling pipeline, and each connection interface is provided with an identification label for the convenience of users. The adapter is powered by 220V, 50Hz single-phase alternating current power supply. Weight: not more than 90 kg. Reliability: mean time between failures (MTBF) ≥1000 hours. Maintainability: basic level mean time to repair (MTTR) ≤1 hour.

[0044] Referring to Figure 1 As shown in the figure, the adapter of the embodiment is connected in series with the external hydraulic source, the output pressure / flow rate of the external hydraulic source is controlled and adjusted by the control unit, and then the hydraulic energy source meeting the requirements of the hydraulic system of the fourth aircraft is output, replacing the on-board hydraulic pump to supply pressure to the on-board hydraulic system, so as to realize the ground test, air tightness check, cleaning and hydraulic oil tank filling of the on-board hydraulic system.

[0045] Referring to Figure 2 and Figure 3 As shown in the figure, the adapter of the embodiment mainly consists of four parts of a vehicle body structure 35, a pressure / flow rate 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, the wheels adopt oil-resistant rubber wheels, the front wheels adopt a 360° steering trolley chassis form with brakes, and one person can conveniently move it. The man-machine engineering design is carried out according to GJB2873-1997 Military Equipment and Facilities Man-Machine Engineering Design Guidelines. An electrical control cabinet is arranged on the upper part of the vehicle body, a control display screen is installed on the upper part of the electrical control cabinet, the height is designed according to the human operation habit, and the operation and observation are convenient, and operation buttons are arranged. The display screen of the vehicle body is provided with a dustproof cover, and the lower end is provided with a movable door cover which is convenient to open and maintain. The oil supply hose, oil return hose, oil filling hose and cable are wound around the periphery of the vehicle body. A pushing handle is arranged at the front end of the vehicle body. A water stop line is arranged at the joint part of each door cover of the vehicle body, and a sealing rubber strip is arranged, and the whole vehicle is waterproof treated. The surface adopts a baking finish process, has acid, alkali, salt and fog corrosion resistance, wear resistance and impact resistance, and adopts silk screen printing identification.

[0046] Referring to Figure 4As shown, the pressure / flow control unit 32 of the adapter in this embodiment includes a quick connector 1, a pressure supply switching 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 adapter return oil hose 16, a safety valve 17, a check valve 18, a sampling valve 19, a temperature sensor 20, a quick connector 21, a return oil switching valve 22, a safety valve 23, a pressure regulating / relief valve 24, a safety valve 25, a quick connector 26, a refueling valve / joint 27, a self-circulation interface 28, a water removal multi-channel module 29, a quick connector 30, and a quick connector 31.

[0047] Referring to Figure 5 As shown, the pressure supply switching valve 2 is used for connecting the adapter with the pressure supply interface of an external hydraulic source, and only the pressure supply switching valve needs to be replaced to connect with the pressure supply interface of another type of external hydraulic source.

[0048] Referring to Figure 6 As shown, the return oil switching valve 22 is used for connecting the adapter with the return oil interface of an external hydraulic source, and only the return oil switching valve needs to be replaced to connect with the return oil interface of another type of external hydraulic source.

[0049] The proportional pressure reducing valve 3 is used for pressure control, and the output pressure setting range is 0-22 MPa, and the working characteristics are shown in Table 1.

[0050] Table 1: Working characteristics of the proportional pressure reducing valve

[0051]

[0052] The proportional flow valve 4 is used for flow control, and the flow adjustment range is 1-160 L / min, and the working characteristics are shown in Table 2.

[0053] Table 2: Working characteristics of the proportional flow valve

[0054] Maximum working pressure 31.5 MPa Flow regulation range 1-160 L / min Power supply 24V DC ]]> Input signal 0~10V DC ]] Maximum power consumption 40W Weight 8.5 kg

[0055] The pressure transmitter is used for monitoring the system pressure, the measurement range is 0-25 MPa, the power supply is DC 24V, the output is 0-5V, and the accuracy is 0.5% FS.

[0056] The hydraulic oil filter pressure supply part 1 is only without a bypass valve, and the differential pressure sensor working characteristics are shown in Table 3.

[0057] Table 3: Working characteristics of the hydraulic oil filter

[0058] Maximum working pressure 22 MPa Maximum flow 80 L / min Filtering accuracy 3 μm, β3≥ 200 By-pass valve No Pressure differential alarm value 6.9 ± 1 bar

[0059] The sampling valve is used for sampling and detecting system oil, adopts needle valve, flow is 5L / min, pressure resistance is greater than or equal to 1.5Mpa.

[0060] The buffer valve is used for inhibiting hydraulic impact and protecting pressure transmitter.

[0061] The safety valve is used for providing safety protection for system pressure supply path, system oil return path and oil supply path.

[0062] The stop valve is used for closing pressure supply path and providing pressure relief path for the system when the equipment is stopped.

[0063] The electromagnetic valve is used for closing / opening oil supply path.

[0064] The integrated temperature sensor is used for monitoring system oil temperature, and the system controls over-temperature shutdown alarm according to the set temperature control point, measurement range is -50 DEG C to 200 DEG C, power supply is DC 24V, output is 0-5V, and precision is 0.5%.

[0065] The hydraulic pipeline adopts aviation stainless steel pipe with a pass Φ18 for oil return part, a pass Φ13 for high pressure part and a pass Φ8 for oil supply part.

[0066] The quick connector is used for quick connection / replacement of pressure supply, oil return and oil supply hoses and on-machine pressure supply, oil return and oil supply valves and conversion connection of equipment self-circulation connector.

[0067] The pressure supply valve is matched with four type machine interface.

[0068] The oil return valve is matched with four type machine interface.

[0069] The pressure supply, oil return and oil supply hoses provide external connection pipeline for the equipment, the pressure supply hose (13II-4000C) has a length of 4m, a pipe diameter of Φ13 and a working pressure of 25MPa, the oil return hose (22I-4000C) has a length of 4m, a pipe diameter of Φ22 and a working pressure of 5MPa, and the oil supply hose (06I-4000C) has a length of 4m, a pipe diameter of Φ6 and a working pressure of 5MPa, and the hoses are provided with marks.

[0070] The water removal multi-path module provides oil liquid water removal device parallel interface.

[0071] Referring to Figure 4 The working principle of the adapter in the embodiment for machine connection test / machine cleaning is shown in the drawing.

[0072] Oil supply section: Oil is output from an external hydraulic power source, passing through pressure supply adapter valve 2, quick coupling 1, proportional pressure reducing valve 3, proportional flow valve 4, buffer valve 6, pressure transmitter 5 [monitoring the oil supply pressure of the equipment. The pressure transmitter output signal is processed by the control system and displayed on the operation panel. 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, shut-off valve 7, pressure supply hose 11, quick coupling 12, pressure supply valve 13, and enters the aircraft hydraulic system via the aircraft pressure supply valve. A safety valve 23 and a pressure regulating / relief valve 24 are installed on the oil supply line.

[0073] Oil return section: Oil flows from the aircraft hydraulic oil tank suction port through suction valve 14, quick connector 15, adapter return hose 16, check valve 18, water removal multi-port module 29, temperature sensor 20, quick connector 21, and return adapter valve 22. The oil then returns to the external hydraulic power source via the suction hose. A sampling valve 19 and a safety valve 17 are installed on the return line.

[0074] Reference Figure 7 As shown, the working principle of the adapter for refueling the aircraft hydraulic oil tank in this embodiment is as follows:

[0075] The hydraulic fluid is supplied from an external hydraulic power source, passing through a pressure supply adapter valve 2, quick connector 1, proportional pressure reducing valve 3, proportional flow valve 4, buffer valve 6, pressure transmitter 5 [monitoring the equipment's refueling pressure. The pressure transmitter output signal is processed by the control system and displayed on the operation panel. When the 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, and refueling valve / connector 27, before entering the aircraft hydraulic oil tank through the aircraft refueling port. A safety valve 25 and a pressure regulating / relief valve 24 are installed on the refueling pipeline.

[0076] Reference Figure 8 As shown, the working principle of vacuum dehydration in this embodiment, where the adapter and the oil dehydration device work together, is as follows:

[0077] The vacuum dehydration function needs to be used in parallel with a universal hydraulic adapter. The external hydraulic power source must use a closed-loop pressure supply mode. The device's pressure / flow control unit should be selected with the online test / cleaning function to dehydrate the aircraft's hydraulic system. Oil enters the adapter's return line from the aircraft's return port, passes through the dehydration multi-channel module, and then enters the oil dehydration device. After dehydration, it returns to the dehydration multi-channel module and then to the external hydraulic power source. The dehydrated oil then enters the aircraft's hydraulic system through the supply circuit, thus achieving the dehydration of aircraft oil. The oil dehydration device uses vacuum dehydration.

[0078] After connecting the first quick connector 55 and the second quick connector 56 with the hydraulic universal adapter respectively, the reversing valve 44 is switched to the circulating position, and the motor 46 and the vacuum pump 66 are started. The oil liquid in the hydraulic universal adapter enters the purification tank 61 through the quick connector 56, the oil return hose 57, the back pressure valve 57, and is monitored by the differential pressure transmitter 62 on the purification tank. When the liquid level exceeds the set value, the system will stop and prompt the user. The oil liquid flows through the reversing valve 44 from the purification tank 61, is extracted by the gear pump 45, and returns to the hydraulic system of the hydraulic universal adapter 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 (which can sample the oil liquid for offline contamination detection), the safety valve 53 (which is used to protect the hydraulic system and avoid the system oil pressure being too high), the oil supply hose 54, and the quick connector 55.

[0079] 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 for monitoring the vacuum degree in the tank. When the vacuum degree exceeds the set value, the system will stop and prompt the user. The gas is then discharged through the oil-water separator 65 and the vacuum pump 66.

[0080] Referring to Figure 9 The adapter power supply mode of the embodiment is AC220V / 50Hz, which is provided with an electric leakage protector, a relay, and a switching power supply. The power supply has overcurrent, electric leakage, over / under voltage, and short circuit protection prompts. The electric leakage protector is used for overcurrent and electric 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 poles and 2A, and the electric leakage current is 30mA. The relay is used for system power supply switching and pressure regulation automatic / manual conversion. The switching power supply is used for power supply of the control panel, sensors, electromagnetic valves, and relays. The output power is 200W, the input voltage range is 175V-264V 50Hz / 60Hz, and it has shielding measures to prevent electromagnetic radiation from interfering with the control system. The power cable is used for external power supply, adopts a three-core cable, 3x1mm 2 , and the length is 20m.

[0081] Referring to Figure 10As shown, the adapter of the embodiment adopts an embedded single-chip microcomputer control system control board to realize automatic control of mechatronics, a high-brightness liquid crystal display screen with touch function, and an operation interface developed by professional software for man-machine interaction. The control board is composed of 8-bit AD analog input channels (input 0-5V), 4-bit DA analog output channels (output 0-10V), 8-bit DI switching value input channels, and 8-bit DO switching value output channels. The power supply is 24VDC, one RS485 communication interface, and one RS232 communication interface, which can communicate and control with the lower computer.

[0082] The working principle is as follows: the adapter control system adopts a single-chip microcomputer control board, a high-brightness liquid crystal display screen (with touch function) displays the operation interface, and the control board realizes real-time monitoring of the pressure parameters of the adapter through integrated AD analog input channels, monitors the oil filter state through DI switching value input channels, processes system data information, and displays data to the operation interface. The user realizes man-machine interaction through the operation interface on the display screen, the system feeds back through the interface operation instructions, analyzes data, realizes pressure / flow control through DA analog output channels, realizes pressure regulation automatic / manual mode conversion through DO switching value output channels to control the intermediate relay, so as to realize the conversion and regulation of the output oil pressure and flow of the adapter. During the operation of the equipment, the control system monitors the outlet pressure and the working state of the oil filter; when the oil filter element is blocked, the display shows "replace the filter element" and flashes, at which time the user should replace the filter element in time; when the pressure reaches the specified upper limit value, the equipment gives an alarm and stops supplying pressure.

[0083] Based on the above embodiment, the advantages of the oil liquid water removal device of the utility model are analyzed as follows:

[0084] 1. Reliability design

[0085] 1.1 The mechatronics technology of the adapter controlled by the single-chip microcomputer is the mature technology of the company; the selected devices are all the brands adopted by the company's batch production products, more than 95% of which are mature devices used in the company's batch production products, and the reliability of the main components used in the adapter can meet the requirements of reliability design.

[0086] 1.2 In the design, attention should be paid to the reliability design of the adapter, and strict reliability analysis and design should be carried out, including reliability distribution, prediction, use of high-reliability components, redundancy design, derating design and mature technology, and mature technology is adopted for the key components to ensure the reliability of the product.

[0087] 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 in the development process of the adapter to improve the reliability of the product.

[0088] 1.4 The adapter is redundantly designed for the key system affecting product safety. A pressure transmitter monitoring system is installed on the oil supply pipeline to monitor the oil supply pressure. When the pressure exceeds the set value, the pressure supply is automatically stopped and the user is prompted.

[0089] 1.5 The technology of the adapter is mature and patented by the company after years of use in the field.

[0090] 1.6 The adapter has intelligent control capability, with pressure transmitter, temperature transmitter, oil filter cartridge alarm sensor, temperature, and oil filter status. When the oil filter cartridge is blocked, the system pressure is too high, the temperature is too high, and other faults occur, the device will automatically stop supplying pressure and alert the user through the display screen.

[0091] 1.7 The adapter structure design adopts the structure design of similar mature equipment of the company, which has been used in the field for many years and has good reliability.

[0092] 1.8 The adapter vehicle structure adopts surface baking paint process, hydraulic conduit uses aviation stainless steel conduit, pipe joint uses high-quality steel material processing, and the selected components can avoid damage and strength reduction caused by climate, corrosion, wear and tear, etc.

[0093] 1.9 All movable parts and components with relative movement of the adapter have sufficient space, and the deformation of the structure will not affect its movement. Measures such as leaving at least a 5mm gap between conduits can effectively prevent wear and tear between components.

[0094] 1.10 All detachable parts and non-moving structures connected to each other of the adapter are connected by bolts and take anti-loosening measures to ensure firm and reliable connection.

[0095] 1.11 The adapter design avoids sudden stiffness changes, sharp corners, sharp edges, and low surface finish, reducing factors that may cause stress concentration.

[0096] 1.12 The adapter structure has sufficient clearance under static, thermal and dynamic conditions to prevent mechanical jamming, scratches or other accidents.

[0097] 1.13 The adapter vehicle door cover is equipped with a water barrier, drainage, and a sealing strip to avoid water accumulation, icing, and hinder the mechanism from working.

[0098] 1.14 The adapter hydraulic system uses nitrile rubber and fluorine rubber materials for all seals, which have good environmental adaptability and avoid leakage caused by reduced mechanical properties of the seals.

[0099] 1.15 The adapter electrical system has a leakage protector, circuit breaker for leakage, overcurrent, short circuit, and the selected power supply has overcurrent, over / under voltage protection.

[0100] 1.16 The adapter instrument sensor is arranged in the vehicle body.

[0101] 1.17 The adapter signal and power circuit ground are independent circuits, and effective shielding is provided for the signal to avoid the influence of electromagnetic interference, or to reduce it to an acceptable level, and to protect personnel from electrical injury.

[0102] 2. Maintenance design

[0103] 2.1 According to the requirements of GJB 368B "General Requirements for Equipment Maintainability" and GJB Z91 "Maintenance Design Technical Manual", the maintainability design is carried out, the functions are simplified and combined, unnecessary and even secondary functions are eliminated, the same and similar functions are combined together, the product and maintenance operation, the same type of parts and components have interchangeability, the devices are reduced as much as possible, and the maintenance space is ensured on the device layout, which is convenient for the installation, disassembly and maintenance of the adapter, thereby reducing the maintenance content and difficulty; error-proof measures are adopted for mechanical and electrical interfaces, and the connection interface is provided with a mark, which meets the human-machine engineering design for field use.

[0104] 2.2 The adapter has intelligent control capability, and sets up fault alarm prompts such as oil filter element blockage, system overpressure and overtemperature, which improves the accuracy and efficiency of fault detection and diagnosis.

[0105] 2.3 The leakage protector is arranged in the electrical system, which protects the circuit from short circuit, overcurrent and leakage, and turns off the power supply during maintenance, thereby improving the safety of maintenance.

[0106] 2.4 The instruments and tools used during maintenance are general instruments and tools.

[0107] 2.5 The adapter uses parts that do not need or rarely need preventive maintenance, thereby reducing the content and frequency of maintenance.

[0108] 2.6 The adapter only needs to repair faults, measure and adjust performance parameters such as proportional pressure reducing valve under specified conditions, and does not need to be overhauled.

[0109] 2.7 The adapter identification label is arranged at a position convenient for maintenance personnel to observe, the identification is printed by silk screen process and the label is hung, which can ensure that it does not fall off or fade during the product repair period.

[0110] 2.8 The adapter is composed of four functional modules, i.e. vehicle body structure, pressure / flow control unit, power supply unit, control and display unit.

[0111] 2.9 The adapter often parts are arranged on the operation panel or corresponding position with movable door cover, the door cover can be easily opened, and the check point, test point, check window and other parts are arranged in the position convenient to access.

[0112] 2.10 The switch of the adapter is arranged near the door cover and corresponding position with movable door cover, and the accessibility is good.

[0113] 2.11 The adapter is configured in different accessibility positions according to the size of the failure frequency of the parts, the difficulty of adjustment work, the size of the weight and other factors, to ensure that the parts with high failure frequency and frequent preventive maintenance have good accessibility and provide necessary maintenance space.

[0114] 2.12 The adapter parts which are easily damaged and not repairable are all detachable assemblies, and the quick detachable connecting parts (such as threaded mounting and pipe joint mounting) are used to facilitate quick replacement and repair.

[0115] 2.13 The adapter has interchangeability of the same type, same function parts and assemblies.

[0116] 2.14 The adapter adopts standardized design and selects standardized equipment, accessories and parts. Standard components and parts are used, and if there is no suitable standard part temporarily, non-standard part is designed according to the interface of standard part, which can provide conditions for using standard part in the future.

[0117] 2.15 The adapter has operation sequence number and movement direction mark (such as switch direction, pressure regulating knob direction, etc.) for the operation adapter with fixed operation procedure.

[0118] 2.16 The adapter adopts error prevention design to ensure the correct installation of the accessory with directionality and to ensure that the accessories with similar appearance but different functions cannot be installed together.

[0119] 2.17 The adapter marks the flow direction on the fluid accessory (such as check valve, safety valve, etc.) to prevent reverse installation.

[0120] 2.18 The adapter adopts error prevention design to ensure that the important equipment or parts cannot be installed incorrectly.

[0121] 2.19 The adapter adopts error prevention design to prevent errors during connection and assembly, and even if an operation error occurs, it can be immediately discovered to avoid damage to the device and accidents.

[0122] 2.20 The adapter has physical error prevention measures at the electrical, hydraulic and mechanical connections of adjacent products to prevent interchanging or incorrect installation.

[0123] 2.21 The oil filter and filter element of the adapter can be easily disassembled without discharging the oil in the system and oil tank.

[0124] 2.22 The operation interface is provided with a help button, which contains built-in operation rules, precautions, and troubleshooting methods, etc. The operator can obtain help at any time. The operator is prompted by prompt information at each step of operation, and important instructions are required to be confirmed before input. According to the human-machine engineering design, the operation design is simplified, the workload of the operator is minimized, the operation of the user is facilitated, and sufficient clear and explicit prompts are given in the operation to minimize the requirement for the operator's skills.

[0125] 3. Testability design

[0126] 3.1 The product testability design and analysis are carried out according to GJB 2547-2012 “General Requirements for Equipment Testability Faults”, GJB 5188-2003 “General Technical Requirements for Aircraft Ground Automatic Test Equipment”.

[0127] 3.2 The adapter has a relatively perfect in-flight test technology, has a start self-detection function, and completes self-confidence test, fault isolation and verification test.

[0128] 3.3 The adapter adopts a single-chip microcomputer control system, and sets up monitoring and display of pressure, temperature and oil filter state in the system. When the oil filter is blocked and the working pressure and temperature of the system exceed the set value, the equipment stops and gives an alarm to the user.

[0129] 3.4 The adapter has power over / under voltage, overcurrent, open-phase and leakage protection prompt functions.

[0130] 3.5 The types and quantities of detection points can meet the needs of repair agencies at all levels, and their layout is conducive to testing, as far as possible concentrated or zoned concentrated, and good accessibility.

[0131] 3.6 The selection of detection points adapts to the principle of in-situ testing, and their arrangement should be conducive to logical sequential testing.

[0132] 3.7 The marking of detection points should be eye-catching, and nameplates and silk-screen marks are used as markers.

[0133] 3.8 The adapter has software and hardware interfaces, which is convenient for equipment inspection and on-site verification. The transmitters used are located at positions convenient for disassembly, so as to facilitate disassembly, inspection or calibration.

[0134] 4. Safety design

[0135] 4.1 The adapter design provides maximum safety and convenience during the use of the equipment, such as installation, disassembly, transportation, maintenance, operation, storage and preservation, etc., in accordance with the relevant provisions of GJB 900A "General Requirements for Equipment Safety" and in combination with the provisions of Section 5.13 of GJB 2873-1997 "Guidelines for the Ergonomic Design of Military Equipment and Facilities".

[0136] 4.2 Safety design

[0137] In order to achieve the goal of safety design of the equipment, in combination with the specific circumstances of the equipment and in reference to the relevant provisions of GJB 900A, the equipment adopts safety design, including mechanical system safety design, electrical control system safety design, power protection, error prevention, software safety design, etc., to avoid unacceptable risks of accidents.

[0138] 4.2.1 Mechanical system safety design The mechanical system safety design reduces the potential safety hazards to the equipment operators, maintenance personnel and support objects caused by mechanical failures through material selection, structure design, joint connection design and operation control design, and the measures include:

[0139] a) Selecting high-quality processing materials to ensure the strength, stability and safety of the equipment structure;

[0140] b) Error prevention and insurance design for mechanical joint connections;

[0141] c) Control operation design for easy use, with operation step prompts and anti-misoperation design;

[0142] d) Round the sharp edges of the adapter edges to prevent scratches and injuries;

[0143] e) Protective measures are provided for all movable parts to prevent injuries caused by misoperation.

[0144] 4.2.2 Electrical control system safety design The electrical control system safety design reduces the potential safety hazards to the equipment operators, maintenance personnel and support objects caused by electrical failures through grounding and automatic protection in combination with the electrical characteristics of the equipment, and the measures include:

[0145] a) All metal parts, panels, control boxes and shielding layers of the equipment are reliably grounded under normal working conditions, and a grounding line is provided at the tail of the vehicle body with a grounding mark;

[0146] b) The equipment uses standard 220V single-phase power supply, and a three-wire electrical connection is used in the power supply circuit, i.e., in addition to the working zero, a protective zero line is also provided, and the vehicle shell is grounded to prevent safety problems such as electric shock, and the leakage protector used in the electrical system has automatic trip protection functions such as short circuit, overcurrent and leakage to prevent chain reaction failures of components.

[0147] 4.2.3 Measures of power protection design include:

[0148] a) Selecting industrial-grade switching power supply with overvoltage and overcurrent protection functions, and shielding measures to prevent electromagnetic radiation, to ensure that the device itself is safe when external power supply is abnormal;

[0149] b) Selecting electrical plug (seat) with anti-misplug design, which is not electrified when separated.

[0150] 4.2.4 Error prevention design Through unique interface design, obvious signs are marked to reduce safety hazards caused by human error, measures include:

[0151] a) Fully consider the selection and installation position of the connector to avoid installation errors;

[0152] b) Each module of the device has obvious signs to prevent incorrect installation.

[0153] 4.2.5 Measures of software safety design include:

[0154] a) Use safe and reliable data backup to prevent user data loss.

[0155] 4.2.6 Set pressure transmitters and temperature sensors in the hydraulic system of the device to monitor system working pressure and oil temperature, and stop the car when the pressure and oil temperature are greater than the set value to prevent damage to aircraft hydraulic system components.

[0156] 4.2.7 Set safety valves in the oil supply, return oil, and oil filling pipelines of the hydraulic system of the device to protect the system pressure and prevent damage to aircraft hydraulic system components.

[0157] 4.2.8 Serious safety-endangering devices and components have automatic fault protection measures, and will not cause consequences such as injury to personnel and damage to other devices and components when a component or device fails or is damaged. Systems and components that are prone to serious consequences when damaged, such as proportional valves and other critical devices and systems, are placed in locations that are not easily damaged.

[0158] 4.2.9 The adapter hydraulic system is equipped with high-precision oil filters and self-cleaning measures to ensure that the aircraft hydraulic system is not contaminated.

[0159] 4.2.10 Oil filter clogging alarm is provided, and when the oil filter element is clogged, the device stops and the display screen prompts the user to "replace XX oil filter element." The oil filter status bar displays "replace filter element XX" and flashes red.

[0160] 4.2.11 The device adopts single-chip microcomputer controlled configuration Chinese interface, real-time monitoring device running state (pressure, temperature, oil tank level, oil filter filter core state), design in line with human characteristics, set the operation button, function selection, digital display, alarm indication, each step operation has the corresponding operation prompt, pressure, temperature reaches the alarm value, the device automatically protects parking alarm prompt.

[0161] 4.2.12 The operation panel is provided with an emergency stop button. When the device has a sudden failure, press the emergency button and the device will stop running immediately to prevent damage to the device and the aircraft hydraulic system.

[0162] 4.2.13 The adapter separates dangerous goods, components and operations from other operations, areas, personnel and materials.

[0163] 4.2.14 The adapter has a dangerous part marked with prominent signs, symbols and text warnings, such as electrical control part silk printing high voltage danger identification, to prevent accidents and endanger personnel and equipment safety.

[0164] 4.2.15 The device "use and maintenance manual" and "simple operation method and matters needing attention" stipulate the related requirements of the device regular inspection and cleaning oil requirements, while the "use and maintenance manual" stipulates the specific requirements of oil testing and puts forward the safety related matters needing attention.

[0165] 4.2.16 The device "use and maintenance manual" and "simple operation method and matters needing attention" will list the safety related parts as matters needing attention.

[0166] 4.2.17 Safety operation warning signs and operation flow indication nameplates are set in obvious positions to remind operators to operate according to the specified process.

[0167] 5. Guarantee design

[0168] 5.1 According to the requirements of the adapter design guarantee work, the ability of fault-free task execution and rapid repair ability are emphasized. From the beginning of the design of the adapter, the comprehensive support work is emphasized, and the guarantee is considered as important as performance, progress and cost. It is emphasized that the product design must be influenced by the comprehensive support work, and the optimized comprehensive support plan is made through the comprehensive support activities of guarantee analysis to reduce the use and support cost of the adapter.

[0169] 5.2 The adapter detection and maintenance adopts universal tools, instruments, meters and equipment.

[0170] 5.3 The adapter adopts an 8" high-brightness, wide-temperature liquid crystal display screen with touch function to display the operation interface, which can be clearly seen in strong or weak light. The temperature and pressure of the temperature transmitter and pressure transmitter monitoring system can be displayed in real time on the operation interface.

[0171] 5.4 The adapter can be quickly, simply, safely, reliably and accurately connected to the interface of the aircraft hydraulic system.

[0172] 5.5 The equipment can be measured by market standard measuring instruments without the need to develop special measuring equipment. The pressure and temperature sensors used by the equipment are calibrated by a third-party measurement technology institution recognized by the state before leaving the factory, and a calibration certificate is delivered with the equipment. The measurement confirmation mark is also provided to indicate that it meets the use requirements. The use and maintenance manual delivered with the equipment will clearly specify the measurement method and precautions of the sensors.

[0173] 5.6 Guaranteeing information

[0174] Prepare and provide the use and maintenance manual, packing list, certificate of conformity (history book), spare parts list, etc.

[0175] 5.7 Technical training

[0176] After the equipment is delivered to the user, professional technical personnel will be arranged to conduct comprehensive technical training on the operation personnel in terms of equipment installation, integration debugging, working principle, operation method, fault analysis, troubleshooting method, daily maintenance of the equipment, and precautions, etc.

[0177] 5.8 Product accessories

[0178] Prepare the accessory list to establish the tools and accessories that come with the equipment.

[0179] 5.9 Technical service

[0180] The equipment is installed with a label indicating the equipment name, model specification, factory number, manufacturer, and factory time, and the equipment name and model specification are consistent with the contract.

[0181] The company's after-sales service system is perfect, with a warranty period of 3 years after acceptance. Lifelong maintenance services are provided, and spare parts are guaranteed. After the warranty period, spare parts and technical support are provided at the cost price. The company's after-sales service system is perfect, providing 7x24-hour technical support and services to users. Within 2 hours of equipment failure, technical personnel will be arranged to repair the equipment on site within 2 working days.

[0182] 6. Environmental adaptability

[0183] 6.1 Low temperature

[0184] The low temperature environment is considered in the structural design and component selection. The selected components are used in other mature products. The automatic heating control is set for the components with poor low temperature adaptability, such as display screen, to improve the low temperature adaptability. The similar products have been subjected to low temperature storage and working test according to the requirements of GJB150.4A-2009 "Military Equipment Laboratory Environmental Test Methods Part 4: Low Temperature Test", so as to ensure that the equipment can normally work at the specified low temperature storage temperature (-55℃) and the low temperature working temperature (-40℃).

[0185] 6.2 High temperature

[0186] The high temperature environment is considered in the structural design and component selection. The selected components are used in other mature products. The heat dissipation fan is set for the components with high heat to improve the high temperature adaptability. The similar products have been subjected to high temperature storage and working test according to the requirements of GJB150.3A-2009 "Military Equipment Laboratory Environmental Test Methods Part 3: High Temperature Test", so as to ensure that the equipment can normally work at the specified high temperature storage temperature (+70℃) and the high temperature working temperature (+55℃).

[0187] 6.3 Damp heat

[0188] The damp heat environment is considered in the structural design and component selection. The plastic deformation of the components and structural parts is prevented at low temperature. The equipment has a good temperature control system to ensure that the equipment can normally work at high temperature. The similar products have been subjected to damp heat test according to the requirements of GJB150.9A-2009 "Military Equipment Laboratory Environmental Test Methods Part 9: Damp Heat Test", so as to ensure that the adapter can normally work at the relative humidity of not more than 95%.

[0189] 6.4 Mold

[0190] The mold prevention design is considered in the equipment design process. The chamfer process is adopted in the structural design to avoid the generation of dead angle. The wear-resistant baking paint process is adopted for surface treatment to improve the mold resistance. The mold-resistant electrical components are selected and subjected to "three-proofing" treatment. The similar products have been subjected to mold test according to the requirements of GJB150.10A-2009 "Military Equipment Laboratory Environmental Test Methods Part 10: Mold Test", so as to ensure that the adapter can resist the mold level of not worse than 2 levels, will not cause physical damage, and can normally work.

[0191] 6.5 Salt spray

[0192] The surface of the vehicle body is coated with wear-resistant baking paint to enhance corrosion resistance and salt spray resistance. The electrical components are resistant to salt spray corrosion and have been treated with "three-proofing" treatment. The same type of product has been subjected to salt spray testing in accordance with GJB150.11A-2009 "Military Equipment Laboratory Environmental Test Methods Part 11: Salt Spray Test", so it can be ensured that the adapter can be used normally in a salt spray environment.

[0193] 6.6 Transportation vibration

[0194] The vibration environment is considered in the design, and damping mechanisms are provided between the front and rear wheels and the vehicle body. The main components of the equipment are provided with damping measures, the fasteners are provided with lock nuts, and the movable parts are provided with open pin anti-loosening measures. The same type of product has been tested in accordance with GJB150.16A-2009 "Military Equipment Laboratory Environmental Test Methods Part 16: Vibration Test", so it can be ensured that the adapter can withstand the vibration environment induced during transportation by road, rail, waterway, and air.

[0195] 6.7 Rain

[0196] The whole vehicle adopts a box-type hidden mechanical structure. The vehicle body upper cover, display screen dust cover, and each door cover are provided with a water blocking line and are equipped with a sealing rubber strip. A protective cover is configured for use during non-working period to protect the whole machine in non-working state, so that the whole vehicle has good rainproof ability. The surface of the vehicle body is coated with wear-resistant baking paint, and the adapter can work normally under the ground rainfall intensity of 1.7mm / min.

[0197] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the utility model. The ordinary skilled in the art can change, modify, replace, and transform the above-mentioned embodiments within the scope of the utility model without departing from the principles and purposes of the utility model.

Claims

1. A universal hydraulic adapter for unmanned aerial vehicles, characterized in that: It includes a pressure / flow control unit and a control unit and a power supply unit connected to it, each unit being mounted on the vehicle body structure; The pressure / flow control unit is connected between the external hydraulic power source and the UAV hydraulic system, and includes a pressure supply line, a return line, and a refueling line. The pressure supply line is used to input oil from the external hydraulic power source into the aircraft hydraulic system, the return line is used to draw oil from the aircraft hydraulic system tank back to the external hydraulic power source, and the refueling line is used to input oil from the external hydraulic power source into the aircraft hydraulic tank through the aircraft refueling port. The control unit includes a control panel and a display interface; The power supply unit is used to supply power to the pressure / flow control unit and the control unit.

2. The universal hydraulic adapter for unmanned aerial vehicles according to claim 1, characterized in that: The pressure supply line is connected in sequence to a pressure supply adapter valve, a quick coupling, a proportional pressure reducing valve, a proportional flow valve, a buffer valve, a pressure transmitter, an oil filter, a shut-off valve, a pressure supply hose, a quick coupling, and a pressure supply valve. Oil enters the pressure supply line from an external hydraulic power source through the pressure supply adapter valve, and is output from the pressure supply valve to the aircraft pressure supply valve to enter the aircraft hydraulic system. A safety valve and a pressure regulating / relief valve are installed on the oil supply line.

3. The universal hydraulic adapter for unmanned aerial vehicles according to claim 2, characterized in that: The return oil line is sequentially connected to an oil suction valve, a quick connector, an inlet adapter return oil hose, a check valve, a water removal multi-port module, a temperature sensor, a quick connector, and a return oil transfer valve. Oil enters the return oil line from the aircraft hydraulic system through the oil suction valve, and is output from the return oil line to the return oil transfer valve to enter an external hydraulic power source. A sampling valve and a safety valve are installed on the return oil line.

4. The universal hydraulic adapter for unmanned aerial vehicles according to claim 3, characterized in that: The refueling pipeline is sequentially connected to a pressure supply adapter valve, quick coupling, proportional pressure reducing valve, proportional flow valve, buffer valve, pressure transmitter, oil filter, solenoid valve, refueling hose, quick coupling, and refueling valve / connector. Oil enters the refueling pipeline from an external hydraulic power source via the pressure supply adapter valve, and exits from the refueling pipeline to the refueling valve / connector valve, then enters the aircraft hydraulic oil tank through the aircraft refueling port. A safety valve and a pressure regulating / relief valve are installed on the refueling pipeline. The pressure supply adapter valve, quick coupling, proportional pressure reducing valve, proportional flow valve, buffer valve, pressure transmitter, and oil filter are shared with the pressure supply pipeline.

5. The universal hydraulic adapter for unmanned aerial vehicles according to claim 4, characterized in that: The pressure / flow control unit also includes an oil dehydration device, which comprises a refueling hose, a refueling filter, a refueling shut-off valve, a manual directional valve, a gear pump, a motor, a check valve, an oil supply filter, a pressure transmitter, a temperature transmitter, a pressure regulating shut-off valve, a sampling valve, a safety valve, an oil supply hose, a first quick connector, a second quick connector, a 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 a hydraulic universal adapter. After the water removal multi-channel module is connected, the reversing valve is switched to the circulation position, and the motor and vacuum pump are started. The oil in the hydraulic universal adapter enters the purification tank through the first quick connector, return hose, and back pressure valve. From the purification tank, it flows through the reversing valve, is drawn out by the gear pump, and returns to the hydraulic system of the hydraulic universal adapter through the check valve, oil filter, pressure transmitter, temperature transmitter, pressure regulating shut-off valve, sampling valve, safety valve, oil supply hose, and second quick connector. At the same time, the vacuum pump is started, and the gas enters the purification tank through the flow regulating valve, coarse air filter, fine air filter, and then passes through the oil-water separator and is discharged by the vacuum pump. When refueling the purification tank, insert the refueling hose into the oil drum, then switch the reversing valve to the refueling position, open the refueling shut-off valve and the pressure regulating shut-off valve, start the motor to drive the oil pump, and the oil flows through the refueling hose, oil filter, refueling shut-off valve, reversing valve, gear pump, check valve, oil filter, pressure transmitter, temperature transmitter, and pressure regulating shut-off valve into the purification tank. When the oil level in the purification tank reaches the set value, the device automatically stops operating and prompts that refueling is complete.

6. The universal hydraulic adapter for unmanned aerial vehicles according to claim 1, characterized in that: The control board in the control unit consists of an 8-bit AD analog input channel, a 4-bit DA analog output channel, an 8-bit DI digital input channel, and an 8-bit DO digital output channel.

7. The universal hydraulic adapter for unmanned aerial vehicles according to claim 1, characterized in that: The power supply unit is AC220V / 50Hz and includes a leakage current protector, a relay, a switching power supply, and a power cable. The power supply has overcurrent, leakage current, over / under voltage, and short circuit protection prompts. The leakage current 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 a 2-pole 2A with a leakage current of 30mA. The relay is used for system power switching and automatic / manual pressure regulation switching; The switching power supply is used to power the control board, sensors, solenoid valves, and relays, with an output power of 200W and an input voltage range of 175V~264V, 50Hz / 60Hz. The power cable is used for external power supply and is a three-core cable (3×1.0mm). 2 It is 20m long.

8. The universal hydraulic adapter for unmanned aerial vehicles according to claim 1, characterized in that: The vehicle body structure includes a frame and wheels mounted on its bottom. The frame is a hollow box, inside which a pressure / flow control unit, a control unit, and a power supply unit are installed.

9. The universal hydraulic adapter for unmanned aerial vehicles according to claim 8, characterized in that: The side wall of the frame has heat dissipation fins, and the display and operation interface is mounted on the top surface.

10. The universal hydraulic adapter for unmanned aerial vehicles according to claim 8, characterized in that: The wheel includes three steering wheels arranged in a triangle, one of which serves as the front wheel with 360° steering and braking function, and the other two serve as the rear wheels.

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