Dual system hydraulic universal adapter and method

Abstract

The invention discloses a dual-system hydraulic universal adapter and a method, and belongs to the technical field of hydraulic adapters. Comprising two pressure / flow control units, a control unit and a power supply unit, the first pressure / flow control unit and the second pressure / flow control unit are both connected between the external hydraulic source and the unmanned aerial vehicle hydraulic system, the output pressure / flow of the external hydraulic source is controlled and adjusted through the control unit, and then hydraulic energy meeting the requirement of the unmanned aerial vehicle hydraulic system is output. Pressure supply or refueling of a double-hydraulic system of an airplane can be completed; the control unit controls the working parameters of the two groups of pressure / flow control units based on the pressure / flow parameter requirements of the aircraft hydraulic system; and the power supply unit is used for supplying power to the two groups of pressure / flow control units and the control unit. The adapter is provided with two pressure / flow control units, and on-board hydraulic single-system or double-system guarantee work can be carried out under the condition of double-system pressure supply of hydraulic station equipment.

Description

Technical Field

[0001] The invention belongs to the technical field of hydraulic adapters, and in particular relates to a dual-system hydraulic universal adapter and a method. Background Art

[0002] The dual hydraulic systems of large and medium-sized manned aircraft and unmanned aerial vehicle equipment need to obtain protection from the station hydraulic equipment. 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, affecting 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 dual-system hydraulic universal adapter, which, after being connected in series with an external hydraulic source, controls and adjusts the output pressure / flow of the external hydraulic source through a control unit, and then outputs hydraulic energy that meets the requirements of the hydraulic systems of multiple aircraft, replacing the on-board hydraulic pump to supply pressure to the aircraft hydraulic system, and realizes ground testing of the aircraft hydraulic system, air tightness inspection, cleaning, and refueling of the aircraft hydraulic oil tank. The adapter has two pressure / flow control units, and can perform on-board hydraulic single-system or dual-system support work when the hydraulic station equipment supplies pressure with dual systems.

[0005] The technical solution of the present invention is: a dual-system hydraulic universal adapter, comprising two sets of pressure / flow control units and control units and power supply units connected thereto; the first pressure / flow control unit and the second pressure / flow control unit are both connected between an external hydraulic source and a hydraulic system of a drone, 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 dual hydraulic systems of the aircraft;

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

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

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

[0010] 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 the external hydraulic source first hydraulic system / second hydraulic system through the pressure supply transfer valve, is output from the pressure supply valve to the aircraft pressure supply valve and enters the aircraft first hydraulic system / second hydraulic system, and a safety valve and a pressure regulating / pressure relief valve are provided on the oil supply pipeline.

[0011] A further technical solution of the present invention is: the return oil pipeline is connected to the oil suction valve, quick connector, adapter oil return 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 first hydraulic system / second hydraulic system through the oil suction valve, and is output from the return oil pipeline to the return oil transfer valve to enter the external hydraulic source first hydraulic system / second hydraulic system; a sampling valve and a safety valve are provided on the return oil pipeline.

[0012] 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 of the first pressure / flow control unit.

[0013] 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;

[0014] 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.

[0015] 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.

[0016] A method for testing / cleaning a drone using a dual-system hydraulic universal adapter, the specific steps are as follows:

[0017] The input ends of the first pressure / flow control unit pressure supply pipeline and the second pressure / flow control unit pressure supply pipeline are connected to the first hydraulic system and the second hydraulic system of the external hydraulic source respectively, and the output ends are connected to the first hydraulic system and the second hydraulic system of the aircraft respectively;

[0018] The input ends of the first pressure / flow control unit oil return pipeline and the second pressure / flow control unit oil return pipeline are connected to the first hydraulic system and the second hydraulic system of the aircraft respectively, and the output ends are connected to the first hydraulic system and the second hydraulic system of the external hydraulic source respectively;

[0019] The oil is output from the first hydraulic system and the second hydraulic system of the external hydraulic source, and the two oils are respectively in the first pressure / flow control unit and the second pressure / flow control unit through the pressure supply transfer valve, the quick connector, the proportional pressure reducing valve, the proportional flow valve, the buffer valve, the pressure transmitter, the oil filter, the stop valve, the pressure supply hose, the quick connector, the pressure supply valve to the aircraft pressure supply valve, and enter the first hydraulic system and the second hydraulic system of the aircraft respectively;

[0020] The oil is output from the first hydraulic system and the second hydraulic system of the aircraft. The two oils are respectively in the first pressure / flow control unit and the second pressure / flow control unit through the oil suction valve, the quick connector, the adapter oil return hose, the one-way valve, the water removal multi-pass module, the temperature sensor, the quick connector, and the oil return transfer valve. Then, the oil returns to the first hydraulic system and the second hydraulic system connected to the external hydraulic source through the oil suction hose;

[0021] The oil converts and controls the hydraulic energy provided by the first hydraulic system and the second hydraulic system of the external hydraulic source through two sets of oil supply pipelines and two sets of oil return pipelines, completes the pressure supply test of the flight control actuator and the landing gear retraction and extension load, and cleans the single hydraulic system, dual hydraulic system or local pipelines on the aircraft to remove solid particle contaminants in the hydraulic system.

[0022] A method for refueling a UAV using a dual-system hydraulic universal adapter, the specific steps are as follows:

[0023] Connecting the input end of the refueling pipeline to an external hydraulic source, and connecting the output end to the aircraft hydraulic system;

[0024] 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;

[0025] The working medium is converted and controlled through the refueling pipeline to pressure-refuel the hydraulic system tank on the machine.

[0026] Beneficial Effects

[0027] The beneficial effects of the present invention are as follows: 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 tank of the on-board hydraulic system; the dual pressure / flow control units in the adapter can work simultaneously or separately without affecting each other.

[0028] 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.

[0029] 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 dual hydraulic systems of different models. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The principle block diagram of the dual-system hydraulic universal adapter of the present invention;

[0031] Figure 2 A schematic diagram of the composition of the dual-system hydraulic universal adapter system of the present invention;

[0032] Figure 3 A schematic diagram of the dual-system hydraulic universal adapter body structure of the present invention;

[0033] Figure 4 The hydraulic principle diagram of the dual-system hydraulic universal adapter of the present invention;

[0034] Figure 5 Schematic diagram of the pressure transfer valve of the dual-system hydraulic universal adapter of the present invention;

[0035] Figure 6 Schematic diagram of the oil return transfer valve of the dual-system hydraulic universal adapter of the present invention;

[0036] Figure 7 The dual-system hydraulic universal adapter of the present invention works in conjunction with the machine - single system principle diagram;

[0037] Figure 8 The dual-system hydraulic universal adapter of the present invention works in conjunction with the machine - dual-system principle diagram;

[0038] Fig. 9 The working principle diagram of the dual-system hydraulic universal adapter of the present invention for refueling the aircraft hydraulic oil tank;

[0039] Fig.10 Schematic diagram of the dual-system hydraulic universal adapter and the oil dehydration device being linked to perform vacuum dehydration in the present invention;

[0040] Fig.11 The electrical principle diagram of the dual-system hydraulic universal adapter of the present invention;

[0041] Fig.12 Schematic diagram of the main operating interface of the dual-system hydraulic universal adapter of the present invention.

[0042] Explanation of reference numerals: 1. Quick connector, 2. Supply pressure transfer valve, 3. Proportional pressure reducing valve, 4. Proportional flow control valve, 5. Pressure transmitter, 6. Buffer valve, 7. Stop valve, 8. Hydraulic oil filter, 9. Solenoid valve, 10. Refueling hose, 11. Supply pressure hose, 12. Quick connector, 13. Supply pressure valve, 14. Return oil valve, 15. Quick connector, 16. Return oil hose, 17. Safety valve, 18. Check valve, 19. Sampling valve, 20. Temperature sensor, 21. Quick connector, 22. Return oil transfer valve, 23. Pressure regulating / pressure relief valve, hydraulic spiral valve, 24. Overflow valve, 25. Safety valve, 26. Quick connector, 27. Refueling valve / interface, 28. Self-circulation interface, 29. Water removal multi-pass block, 30. Quick connector, 31. Quick connector; 32. Quick connector, 33. Supply pressure transfer valve, 34. Proportional pressure reducing valve, 35. Proportional flow control valve, 36. Pressure transmitter, 37. Buffer valve, 38. Stop valve, 39. Hydraulic oil filter, 40. Supply pressure hose, 41. Quick connector, 42. Supply pressure valve, 43. Return oil valve, 44. Quick connector, 45. Return oil hose, 46. Safety valve, 47. Check valve , 48. Sampling valve, 49. Temperature sensor, 50. Quick connector, 51. Return oil transfer valve, 52. Hydraulic spiral switch, 53. Overflow valve, 54. Self-circulation interface, 55. Quick connector, 56. YXF-183 valve, 57. Quick connector, 58. YXF-184 valve; 61. Refueling hose, 62. Refueling oil filter, 63. Refueling stop valve, 64. Manual reversing valve, 65. Gear pump, 66. Motor, 67. Check valve, 68. Oil supply filter, 69. Pressure transmitter, 70. Temperature transmitter, 71. Pressure regulating stop valve, 72. Sampling valve, 73. safety valve, 74. oil supply hose, 75. first quick connector, 76. second quick connector, 77. oil return hose, 78. flow control valve, 79. air filter coarse, 80. air filter fine, 81. purification tank, 82. differential pressure sensor, 83. absolute pressure sensor, 84. transparent hose, 85. oil-water separator, 86. vacuum pump, 87. back pressure valve; 91. first system oil supply filter, 92. second system oil supply filter, 93. first system oil supply pressure, 94. second system oil supply pressure, 95. first system oil temperature, 96. second system oil temperature;

[0043] 100. First pressure / flow control unit, 200. Second pressure / flow control unit, 300. Control unit, 400. Vehicle body structure, 500. Power supply unit. DETAILED DESCRIPTION

[0044] 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.

[0045] 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.

[0046] 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 dual-system hydraulic universal adapter, including two groups of pressure / flow control units and control units and a power supply unit connected thereto; the first pressure / flow control unit and the second pressure / flow control unit are both connected between an external hydraulic source and the unmanned aircraft hydraulic system, and 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 aircraft hydraulic system is output, thereby completing the pressure supply or refueling of the aircraft dual hydraulic system; the control unit controls the working parameters of the two groups of pressure / flow control units based on the pressure / flow parameter requirements of the aircraft hydraulic system; the power supply unit is used to supply power to the two groups of pressure / flow control units and the control unit.

[0047] Specifically, the first pressure / flow control unit includes a first pressure supply pipeline, a first oil return pipeline and a refueling pipeline; the oil in the first hydraulic system of the external hydraulic source is input into the first hydraulic system of the aircraft through the first pressure supply pipeline, the oil in the first hydraulic system of the aircraft is sucked back to the first hydraulic system of the external hydraulic source through the first oil return pipeline, and the oil input from the external hydraulic source enters the hydraulic oil tank of the aircraft through the aircraft refueling port through the refueling pipeline.

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

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

[0050] The dual-system hydraulic universal adapter of this embodiment is connected to the hydraulic interfaces of existing station hydraulic equipment, large and medium-sized manned aircraft, and unmanned aircraft equipment, and controls the pressure and flow output by the hydraulic equipment to be 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 mature technology of the AC-B / YLC-1 traction hydraulic oil pump truck and has been used in the field for many years. The CB-B / YLC-3A traction hydraulic oil pump truck has been equipped with four accessories and has been used in the field for many years. It uses the mechanical, electrical, and hydraulic integration technology controlled by a single-chip microcomputer, and with the support of special software, it automatically configures the working mode of the corresponding working parameters 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, YH-10 (SY1181-1976). Working pressure: 0-22MPa system I, manually adjustable; 0-22MPa system II, manually adjustable; preset pressure according to the model: 21.3±0.5MPaSystem I, System II; System I, System II. Working flow: 0~50L / min System I, 0~50L / min System II. Refueling pressure: 0~0.5MPa, 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 oil supply and return systems. The adapter is equipped with pressure supply pipelines, oil return pipelines, and refueling pipelines. Each connection interface is marked with a label for user convenience. The adapter is powered by a 220V, 50Hz single-phase AC power supply. Weight: not more than 260kg. Reliability: Mean time between failures MTBF ≥ 1000 hours. Maintainability: Mean time to repair MTTR at the grassroots level ≯ 1 hour.

[0052] Reference Figure 1As shown, after the adapter of this embodiment is connected in series with the external hydraulic source, 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 four types of aircraft, replacing the on-board hydraulic pump to supply pressure to the aircraft hydraulic system, and realizes the ground test of the aircraft hydraulic system, air tightness inspection, cleaning, and refueling of the aircraft hydraulic oil tank. The adapter has two pressure / flow control units, and when the hydraulic station equipment has dual system pressure supply, the dual system support work of the on-board hydraulic system can be carried out simultaneously.

[0053] Reference Figure 2 and Figure 3 As shown, the adapter of this embodiment mainly consists of five parts: a vehicle body structure, a first pressure / flow control unit, a second pressure / flow control unit, a power supply unit, and a control and display unit; the vehicle body structure adopts a four-wheel load-bearing, oil-resistant rubber wheel, and 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 in front 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, the vehicle body cover is designed with a gas spring, and a movable door cover is provided at the lower end for easy opening and maintenance. The vehicle body is provided with a fuel supply hose, a return hose, a refueling hose and a bracket for storing cables. A push handle is provided at the front end of the vehicle body. A water blocking line is provided at the joint of each door cover of the vehicle body, and a sealing strip is installed, and the whole vehicle is waterproofed. The four corners of the vehicle body chassis are provided with fixing devices for lifting and mooring. The surface is painted with baking varnish, and is resistant to acid, alkali, salt, fog corrosion, wear and impact, and is screen-printed for logos.

[0054] The adapter 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 retaining lines and sealing strips. At the same time, a protective cover for use in non-working periods is configured to enhance the equipment's ability to resist rain, moisture, dust and wind. The surface of the vehicle body adopts electrostatic spraying and wear-resistant baking paint technology to improve the equipment's corrosion resistance.

[0055] Reference Figure 4As shown, the first pressure / flow control unit 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 2 7. Self-circulation interface 28, water removal multi-channel module 29, quick connector 30, quick connector 31; the second pressure / flow control unit includes a pressure supply transfer valve 33, a proportional pressure reducing valve 34, a proportional flow regulating valve 35, a pressure transmitter 36, a buffer valve 37, a stop valve 38, a hydraulic oil filter 39, a pressure supply hose 40, a quick connector 41, a pressure supply valve 42, an oil return valve 43, a quick connector 44, an oil return hose 45, a safety valve 46, a one-way valve 47, a sampling valve 48, a temperature sensor 49, a quick connector 50, an oil return transfer valve 51, a hydraulic spiral switch 52, a relief valve 53, and a self-circulation interface 54.

[0056] Reference Figure 5 As shown, the pressure supply transfer valves 2 and 33 are 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.

[0057] Reference Figure 6 As shown, the oil return transfer valves 22 and 51 are 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.

[0058] The proportional pressure reducing valve is used for pressure control, and the output pressure setting range is 0 to 22 MPa. The working characteristics of each of the pressure / flow control units I and II are shown in Table 1.

[0059] Table 1: Operating characteristics of proportional pressure reducing valve

[0060] Maximum input pressure 35MPa Output pressure setting range 0~22MPa Maximum flow 160L / min power supply <![CDATA[24V DC ]]> Input signal <![CDATA[0~10V DC ]]> Maximum power consumption 30W weight 5kg

[0061] The proportional flow valve is used for flow control, and the flow adjustment range is 1 to 160 L / min. The working characteristics of each of the pressure / flow control units I and II are shown in Table 2.

[0062] Table 2: Operating characteristics of proportional flow valve

[0063] Maximum working pressure 31.5MPa Flow adjustment range 1~160L / min power supply <![CDATA[24V DC ]]> Input signal <![CDATA[0~10V DC ]]> Maximum power consumption 40W weight 8.5kg

[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, an accuracy of 0.5%FS, and one pressure / flow control unit I and one II.

[0065] The hydraulic oil filter: one pressure supply part without bypass valve, with differential pressure sensor, working characteristics see Table 3, one pressure / flow control unit I and one pressure / flow control unit II.

[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 oil sampling and testing in the system, adopts a needle valve, has a flow rate of 5L / min, a pressure resistance of ≥1.5Mpa, and has one pressure / flow control unit I and one II.

[0069] The buffer valve is used to suppress hydraulic shock and protect the pressure transmitter, and there is one pressure / flow control unit I and one pressure / flow control unit II.

[0070] The safety valve: There are 3 pressure / flow control units I, which provide safety protection for the system pressure supply passage, the system oil return passage and the refueling passage respectively; there are 2 pressure / flow control units II, which provide safety protection for the system pressure supply passage and the system oil return passage respectively.

[0071] The stop valves are used to close the pressure supply circuit and provide a pressure relief passage for the system when the equipment is shut down. There are two pressure / flow control units I and II.

[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 measuring range is -50℃~200℃, the power supply is DC24V, the output is 0~5V, the accuracy is 0.5%, and there is one pressure / flow control unit I and II.

[0074] The hydraulic pipeline: the oil return part adopts a Ф18 diameter aviation stainless steel pipe; the high-pressure part adopts a Ф13 diameter aviation stainless steel pipe; the refueling part adopts a Ф8 diameter 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: a total of 6 pieces, matched with the interface of the four-type machine, 1 piece for the single-system model and 2 pieces for the dual-system model.

[0077] The oil return valve: a total of 6 pieces, matched with the interface of the four-type machine, 1 piece for the single-system model and 2 pieces for the dual-system model.

[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 25MPa. The oil return hose (22I-4000C) has a length of 4 meters, a diameter of Ф22 and a working pressure of 5MPa. The refueling hose (06I-4000C) has a length of 4 meters, a diameter of Ф6 and a working pressure of 5MPa. The hoses are marked, and there are 2 sets of pressure supply and oil return hoses and 1 set of refueling hoses.

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

[0080] Reference Figure 7 As shown, the working principle of the adapter in this embodiment for single system online test / 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 the aircraft pressure supply valve. Safety valve 24 and pressure regulating / pressure relief valve 23 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 block 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 8 As shown, the working principle of the adapter in this embodiment for dual-system online test / online cleaning is as follows:

[0084] Oil supply part: The oil is output from the external hydraulic source I, II, and enters the aircraft hydraulic system through the pressure supply transfer valve 2, 33, quick connector 1, 32, proportional pressure reducing valve 3, 34, proportional flow valve 4, 35, buffer valve 6, 37, pressure transmitter 5, 36 [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, 39, stop valve 7, 38, pressure supply hose 11, 40, quick connector 12, 41, pressure supply valve 13, 42, and the aircraft pressure supply valve. Safety valve 24, 53, pressure regulating / pressure relief valve 23, 52 are provided on the oil supply pipeline.

[0085] Oil return part: The oil enters the oil return hose 16, 45, one-way valve 18, 47, temperature sensor 20, 49 from the oil suction interface of the aircraft hydraulic oil tank through the oil suction valve 14, 43, quick connector 15, 44, and the adapter. The output signal of the temperature sensor is processed by the control system and 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, 50, return oil transfer valve 22, 51, and then the oil returns to the external hydraulic source through the oil suction hose. Sampling valves 19, 46 and safety valves 17, 48 are provided on the return oil pipeline.

[0086] Reference Fig. 9 As shown, the working principle of the adapter in this embodiment for refueling the aircraft hydraulic oil tank is:

[0087] 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 23 are provided on the refueling pipeline.

[0088] Reference Fig.10 As shown, the working principle of the adapter and the oil dehydration device in this embodiment to perform vacuum dehydration is as follows:

[0089] 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.

[0090] After connecting the first quick connector 75 and the second quick connector 76 to the hydraulic universal adapter respectively, switch the reversing valve 64 to the circulation position, and start the motor 66 and the vacuum pump 86. The oil in the hydraulic universal adapter passes through the quick connector 76, the return oil hose 77, and the back pressure valve 77, and enters the purification tank 71. The purification tank is provided with a differential pressure transmitter 82 to monitor the liquid level in the tank. When the liquid level exceeds the set value, the system will stop and prompt the user. The oil flows from the purification tank 81 through the reversing valve 64, and is pumped out by the gear pump 65. The oil sample can be sampled for offline contamination detection through the check valve 67, the oil filter 68, the pressure transmitter 69, the temperature transmitter 70, the pressure regulating stop valve 71, and the sampling valve 72. The safety valve 73 is used to protect the hydraulic system to avoid excessive oil pressure in the system, and the oil supply hose 74 and the quick connector 75 return to the hydraulic system of the hydraulic universal adapter.

[0091] At the same time, the vacuum pump 86 starts, and the gas enters the purification tank 81 through the flow regulating valve 78, the coarse air filter 79, and the fine air filter 80. The purification tank is equipped with an absolute pressure transmitter 83 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 the gas will be discharged through the oil-water separator 85 and the vacuum pump 86.

[0092] Reference Fig.11 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 is used for system power switch and automatic / manual conversion of pressure regulation. The switching power supply: used to power control panels, sensors, solenoid valves, and relays, with an output power of 300W and an input voltage range of 175V~264V50Hz / 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.

[0093] Reference Fig.12As 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.

[0094] 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.

[0095] Based on the above embodiments, the advantages of an oil dewatering device of the present invention are analyzed as follows:

[0096] 1. Reliability design

[0097] 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.

[0098] 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.

[0099] 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.

[0100] 1.4 The adapter has a redundant design for key systems that affect product safety. A pressure transmitter is set 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.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] 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.

[0108] 1.12 The adapter structure has sufficient clearance under static, thermal and dynamic conditions to prevent mechanical jamming, abrasion or other accidents.

[0109] 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.

[0110] 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.

[0111] 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.

[0112] 1.16 The adapter instrument sensors are all installed inside the vehicle body.

[0113] 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.

[0114] 2. Maintainability design

[0115] 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.

[0116] 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.

[0117] 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.

[0118] 2.4 The instruments and meters used during maintenance are all general instruments and tools are general tools.

[0119] 2.5 The parts used in the adapter require no or very little preventive maintenance to reduce the content and frequency of maintenance.

[0120] 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.

[0121] 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.

[0122] The 2.8 adapter consists of four functional modules: body structure, pressure / flow control unit, power supply unit, and control and display unit.

[0123] 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.

[0124] 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.

[0125] 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.

[0126] 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.

[0127] 2.13 Parts and components of the same model and function of the adapter are interchangeable.

[0128] 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.

[0129] 2.15 The adapter has markings on the operating sequence number and movement direction (such as switch direction, voltage regulating knob direction, etc.) for operating devices with fixed operating procedures.

[0130] 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.

[0131] 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.

[0132] 2.18 The adapter adopts error-proof design to ensure that important equipment or parts cannot be installed in the wrong place.

[0133] 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.

[0134] 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.

[0135] 2.21 The adapter oil filter and filter element can be easily disassembled and assembled without draining the oil in the system and tank.

[0136] 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.

[0137] 3. Testability Design

[0138] 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".

[0139] 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.

[0140] 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.

[0141] 3.4 The adapter has power over / under voltage, over current, phase loss and leakage protection prompt functions.

[0142] 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.

[0143] 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.

[0144] 3.7 The markings of the inspection points should be eye-catching, and nameplates and silk-screen logos should be used as markings.

[0145] 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.

[0146] 4. Security design

[0147] 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".

[0148] 4.2 Security Design

[0149] 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 GJB900A, 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.

[0150] 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:

[0151] a) Select high-quality processing materials to ensure the strength, stability and safety of the equipment structure;

[0152] b) Error-proof and safety design of mechanical joints;

[0153] c) The control operation design is easy to use, with operation step prompts and a design to prevent misoperation;

[0154] d) The sharp edges of the adapter are rounded to prevent scratches and bumps;

[0155] e) All moving parts are protected to prevent injuries caused by misoperation.

[0156] 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:

[0157] 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;

[0158] 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.

[0159] 4.2.3 Power supply protection design measures include:

[0160] 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;

[0161] b) When an electrical plug (socket) with a design to prevent mis-insertion is separated, the pins are not electrically charged.

[0162] 4.2.4 Error-proofing design reduces potential safety hazards caused by human error through unique interface design with obvious signs. Measures include:

[0163] a) Fully consider the selection and installation position of the connector to avoid installation errors;

[0164] b) Each module of the equipment is clearly marked to prevent incorrect installation.

[0165] 4.2.5 Software security design measures include:

[0166] a) Use safe and reliable data backup to prevent user data loss.

[0167] 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.

[0168] 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.

[0169] 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.

[0170] 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.

[0171] 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.

[0172] 4.2.11 The equipment adopts a computer-controlled configuration Chinese interface to monitor the equipment 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.

[0173] 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.

[0174] 4.2.13 The adapter isolates dangerous items, components and operations from other operations, areas, personnel and materials. 4.2.14 The 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.

[0175] 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.

[0176] 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".

[0177] 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.

[0178] 5. Security design

[0179] 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, it is emphasized to carry out comprehensive support work, and support is regarded as a design consideration that is equally important as performance, progress 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. 5.2 Common tools, instruments, meters and equipment are used for adapter inspection and maintenance.

[0180] 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.

[0181] 5.4 The docking interface between the adapter and the aircraft hydraulic system can be connected quickly, easily, safely, reliably, and accurately. 5.5 The equipment can be measured using standard measuring instruments commonly used in the market, without the 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] 6.5.6 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 dual-system hydraulic universal adapter, characterized in that: It includes two groups of pressure / flow control units and a control unit and a power supply unit connected thereto; the first pressure / flow control unit and the second pressure / flow control unit are both 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 dual hydraulic systems of the aircraft; The control unit controls the working parameters of the two groups of pressure / flow control units based on the pressure / flow parameter requirements of the aircraft hydraulic system; The power supply unit is used to supply power to two groups of pressure / flow control units and the control unit.

2. According to claim 1, a dual-system hydraulic universal adapter is characterized in that: The first pressure / flow control unit includes a first pressure supply pipeline, a first oil return pipeline and a refueling pipeline; the oil of the first hydraulic system of the external hydraulic source is input into the first hydraulic system of the aircraft through the first pressure supply pipeline, the oil of the first hydraulic system of the aircraft is sucked back to the first hydraulic system of the external hydraulic source through the first oil return pipeline, and the oil input from the external hydraulic source enters the hydraulic oil tank of the aircraft through the aircraft refueling port through the refueling pipeline.

3. The dual-system hydraulic universal adapter according to claim 2, characterized in that: The second pressure / flow control unit includes a second pressure supply pipeline and a second oil return pipeline; the oil of the second hydraulic system of the external hydraulic source is input into the second hydraulic system of the aircraft through the second pressure supply pipeline, and the oil in the oil tank of the second hydraulic system of the aircraft is sucked back to the second hydraulic system of the external hydraulic source through the second oil return pipeline.

4. The dual-system hydraulic universal adapter according to claim 3, characterized in that: 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 the external hydraulic source first hydraulic system / second hydraulic system through the pressure supply transfer valve, is output from the pressure supply valve to the aircraft pressure supply valve and enters the aircraft first hydraulic system / second hydraulic system, and a safety valve and a pressure regulating / pressure relief valve are provided on the oil supply pipeline.

5. The dual-system hydraulic universal adapter according to claim 4, 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 first hydraulic system / the second hydraulic system through the oil suction valve, and is output from the return oil pipeline to the return oil transfer valve to enter the first hydraulic system / the second hydraulic system connected to the external hydraulic source. A sampling valve and a safety valve are provided on the return oil pipeline.

6. The dual-system hydraulic universal adapter according to claim 5, 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 arranged 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 of the first pressure / flow control unit.

7. The dual-system hydraulic universal adapter according to claim 6, 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.

8. The dual-system hydraulic universal adapter according to claim 7, 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.

9. A method for testing / cleaning a drone using the dual-system hydraulic universal adapter according to any one of claims 1 to 8, characterized in that The specific steps are as follows: The input ends of the first pressure / flow control unit pressure supply pipeline and the second pressure / flow control unit pressure supply pipeline are connected to the first hydraulic system and the second hydraulic system of the external hydraulic source respectively, and the output ends are connected to the first hydraulic system and the second hydraulic system of the aircraft respectively; The input ends of the first pressure / flow control unit oil return pipeline and the second pressure / flow control unit oil return pipeline are connected to the first hydraulic system and the second hydraulic system of the aircraft respectively, and the output ends are connected to the first hydraulic system and the second hydraulic system of the external hydraulic source respectively; The oil is output from the first hydraulic system and the second hydraulic system of the external hydraulic source, and the two oils are respectively in the first pressure / flow control unit and the second pressure / flow control unit through the pressure supply transfer valve, the quick connector, the proportional pressure reducing valve, the proportional flow valve, the buffer valve, the pressure transmitter, the oil filter, the stop valve, the pressure supply hose, the quick connector, the pressure supply valve to the aircraft pressure supply valve, and enter the first hydraulic system and the second hydraulic system of the aircraft respectively; The oil is output from the first hydraulic system and the second hydraulic system of the aircraft. The two oils are respectively in the first pressure / flow control unit and the second pressure / flow control unit through the oil suction valve, the quick connector, the adapter oil return hose, the one-way valve, the water removal multi-pass module, the temperature sensor, the quick connector, and the oil return transfer valve. Then, the oil returns to the first hydraulic system and the second hydraulic system connected to the external hydraulic source through the oil suction hose; The oil converts and controls the hydraulic energy provided by the first hydraulic system and the second hydraulic system of the external hydraulic source through two sets of oil supply pipelines and two sets of oil return pipelines, completes the pressure supply test of the flight control actuator and the landing gear retraction and extension load, and cleans the single hydraulic system, dual hydraulic system or local pipelines on the aircraft to remove solid particle contaminants in the hydraulic system.

10. A method for refueling a drone using the dual-system 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 through the refueling pipeline to pressure-refuel the hydraulic system tank on the machine.

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