CN114458661A - Dragging type oil pump vehicle system and control method - Google Patents
Dragging type oil pump vehicle system and control method Download PDFInfo
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- CN114458661A CN114458661A CN202110236243.5A CN202110236243A CN114458661A CN 114458661 A CN114458661 A CN 114458661A CN 202110236243 A CN202110236243 A CN 202110236243A CN 114458661 A CN114458661 A CN 114458661A
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- 239000003921 oil Substances 0.000 claims abstract description 586
- 238000000746 purification Methods 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 238000011049 filling Methods 0.000 claims description 44
- 238000010521 absorption reaction Methods 0.000 claims description 32
- 238000004140 cleaning Methods 0.000 claims description 28
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/26—Supply reservoir or sump assemblies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/027—Check valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
- F15B21/0423—Cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
- F15B21/0427—Heating
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
Abstract
The invention provides a system and a control method of a drag-type oil pump vehicle, which comprises a first oil supply system, a second oil supply system and a third oil supply system, wherein the first oil supply system, the second oil supply system and the third oil supply system are used for respectively supplying oil to No. 1, No. 2 and No. 3 hydraulic systems of an airplane; the system comprises a purification system for purifying oil of hydraulic systems of No. 1, No. 2 and No. 3 airplanes; the system comprises a water removal system for removing water from oil of hydraulic systems of airplanes 1, 2 and 3; including fueling systems for fueling aircraft No. 1, 2, and 3 hydraulic systems. The system can be used for providing hydraulic energy meeting requirements for No. 1, 2 and 3 hydraulic systems during daily maintenance, detection and troubleshooting of the airplane, purifying the hydraulic system of the airplane, supplementing hydraulic oil for the hydraulic system, and detecting the pollution degree and the water content of the hydraulic oil. In addition, the hydraulic power can be provided for the aircraft support equipment RAT detection equipment and the engine thrust reverser inspection adapter equipment as a hydraulic source.
Description
Technical Field
The invention belongs to the field of aircraft maintenance devices, and particularly relates to a towing type oil pump vehicle system and a control method.
Background
When daily maintenance, detection and troubleshooting are carried out on an aircraft hydraulic system, the hydraulic system of the aircraft needs to be dewatered, oil of the aircraft hydraulic system needs to be cleaned and purified, and in addition, when the oil of the aircraft hydraulic system is insufficient, oil needs to be supplemented.
In the maintenance process, a corresponding hydraulic system is needed to realize the functions.
Disclosure of Invention
The invention mainly aims to provide a dragging type oil pump vehicle system which can be used for providing hydraulic energy meeting requirements for No. 1, No. 2 and No. 3 hydraulic systems during daily maintenance, detection and troubleshooting of an airplane, purifying the hydraulic system of the airplane, supplementing hydraulic oil for the hydraulic system, and detecting the pollution degree and the water content of the hydraulic oil. In addition, the hydraulic power can be provided for the aircraft support equipment RAT detection equipment and the engine thrust reverser inspection adapter equipment as a hydraulic source.
In order to achieve the technical features, the invention is realized as follows: the system comprises a first oil supply system, a second oil supply system and a third oil supply system, wherein the first oil supply system, the second oil supply system and the third oil supply system are used for respectively supplying oil to No. 1, No. 2 and No. 3 hydraulic systems of an airplane;
the system comprises a purification system for purifying oil of hydraulic systems of No. 1, No. 2 and No. 3 airplanes;
the system comprises a water removal system for removing water from oil of hydraulic systems of airplanes 1, 2 and 3;
including fueling systems for fueling aircraft No. 1, 2, and 3 hydraulic systems.
The first oil supply system, the second oil supply system and the third oil supply system adopt the same system structure;
the first oil supply system comprises an oil suction filter arranged in an oil tank, the oil suction filter is connected with a first duplex electric ball valve through a main system oil suction ball valve, the first duplex electric ball valve is connected with a first motor pump set, the first motor pump set is connected with a first one-way valve, a second one-way valve, a first primary filter and a second secondary filter are connected, the second secondary filter is connected with a second oil supply hose through a second flowmeter, and the second oil supply hose is connected with a first oil supply connector;
the first oil return joint is connected with a first oil return hose, and a first oil return pressure sensor, a first sampling port, a first oil return filter and a first oil return safety valve are sequentially arranged on the first oil return hose; a first air-cooled radiator is arranged between the first oil return filter and the first duplex electric ball valve; and the oil return pipes of the first duplex electric ball valve and the first oil return safety valve are connected with an oil tank.
A first oil supply temperature sensor, a first oil supply pressure sensor and a first lateral pressure/sampling valve are sequentially arranged between the second secondary filter and the second flowmeter, and a first system safety valve is arranged between the second oil supply hose and the first oil return hose.
The purification system comprises an oil tank, the oil tank is connected with a second oil absorption ball valve through an oil absorption filter, the second oil absorption ball valve is connected with a first oil absorption electromagnetic ball valve, the first oil absorption electromagnetic ball valve is connected with an oil filling motor pump set, and a pipeline behind the oil filling motor pump set is sequentially connected with a first primary filter, a first secondary filter, a first oil filling pressure sensor, a first flowmeter, a first oil supply hose and an oil filling connector; an oil filling safety valve is arranged between the first secondary filter and the first flowmeter; the first oil suction electromagnetic ball valve is connected with the oil filling electromagnetic ball valve in parallel.
The water removal system comprises an oil tank, the oil tank is connected with a heating tank through a first oil absorption ball valve, the heating tank is connected with a vacuum tank through a second two-position two-way electromagnetic valve, and the vacuum tank is connected with an oil filling motor pump set of the purification system through a second oil absorption electromagnetic ball valve;
the vacuum tank is connected with the condensing box through a cooler, and the condensing box is provided with a vacuum pump.
A temperature sensor is arranged on the heating tank; a vacuum pressure gauge is arranged on the vacuum tank; and a vacuum filter is arranged on the vacuum tank through a throttle valve.
The refueling system and the purification system share one set of system.
The first oil supply system, the second oil supply system, the third oil supply system and the purification system are respectively connected with a pollution degree monitoring system for detecting the pollution degree grade of oil in an oil tank of the oil pump truck on line, and the pollution degree monitoring system comprises a first two-position two-way electromagnetic valve and a third two-position two-way electromagnetic valve which are respectively connected with the first oil supply system and the purification system correspondingly; the first two-position two-way electromagnetic valve and the third two-position two-way electromagnetic valve are both connected with a granularity detector, and the granularity detector is connected and communicated with an oil tank; the granularity detector is used for monitoring the oil particle pollution degree of various hydraulic and lubricating systems in real time, has a printing function and can print a detection report in real time.
The electric control elements of the first oil supply system, the second oil supply system, the third oil supply system, the purification system, the water removal system and the oil adding system are respectively connected with the electric control system and control the systems to realize corresponding system functions;
the electric control system comprises a PLC control module, a touch screen, a power supply module, a transformer, a phase sequence protector, a servo motor, a driver, a filter, a temperature sensor, a pressure sensor, a flow sensor, a liquid level sensor and a valve controller.
The control method of the dragging type oil pump vehicle system comprises the following steps:
hydraulic sources are provided for hydraulic systems No. 1, 2 and 3 of the airplane:
when a hydraulic source is provided for No. 1, 2 and 3 hydraulic systems of the airplane, hydraulic oil of the hydraulic systems on the airplane is required to be used, and at the moment, the oil pump truck works in a closed state; when the closed state is selected for working, the corresponding duplex electric ball valve is automatically reversed, the connection with an oil pump vehicle oil tank is cut off, the oil pump vehicle is connected with a ground pump oil suction joint of an airplane through an oil return joint, and due to the back pressure effect of an overflow valve, oil returned from the airplane hydraulic oil tank directly returns to an oil suction end of a ground system motor pump set through an oil return pipeline of the oil pump vehicle, so that the oil pump vehicle oil tank does not participate in working and is in a completely 'closed' state, the liquid level of the airplane oil tank is kept balanced, the airplane oil tank and the oil pump vehicle oil tank do not blow-by oil under the state, and the working flow is as follows:
airplane oil return → oil return joint → oil return hose → oil return filter → air cooling radiator → double electric ball valve → motor pump group → one-way valve → first oil filter → second oil filter → flowmeter → oil supply switch → oil supply hose → oil supply joint → airplane;
oil purification, water removal and refueling to the aircraft:
when the oil quantity of the airplane hydraulic system is insufficient, the oil pump vehicle can add hydraulic oil with the pollution degree meeting the requirements into oil tanks of No. 1, No. 2 and No. 3 hydraulic systems of the airplane, remove solid particle pollutants and water in the oil liquid through self-circulation purification, and enable the grade of the pollution degree of the solid particles and the water content of the oil liquid to meet the use requirements through continuous circulation;
the oil liquid purification process comprises the following steps:
the oil tank → the oil suction filter → the second oil suction ball valve → the first oil suction electromagnetic ball valve → the oil filling motor pump group → the first-stage filter → the first second-stage filter → the first oil filling pressure sensor → the oil filling safety valve → the oil tank;
the oil liquid dewatering process comprises the following steps:
the oil tank → the first oil suction ball valve → the heating tank → the second two-position two-way electromagnetic valve → the vacuum tank → the second oil suction electromagnetic ball valve → the oil filling motor pump group → the first-stage filter → the first second-stage filter → the first oil filling pressure sensor → the oil filling safety valve → the oil tank;
the procedure for refueling the aircraft is as follows:
the fuel tank → the oil suction filter → the second oil suction ball valve → the first oil suction electromagnetic ball valve → the refueling motor pump group → the first-stage filter → the first second-stage filter → the first refueling pressure sensor → the first flowmeter → the first fuel supply hose → the refueling joint → the aircraft;
the oiling motor-pump set and the motor-pump set cannot work simultaneously, and are interlocked through electrical control;
the three electromagnetic ball valves of the oil filling electromagnetic ball valve, the first oil absorption electromagnetic ball valve and the second oil absorption electromagnetic ball valve can be opened only one at a time, and the three are electrically controlled and interlocked;
self-cleaning of the oil pump truck and cleaning of the aircraft hydraulic system:
the self-cleaning of the oil pump truck and the cleaning of an airplane hydraulic system both use an oil pump truck oil tank and are in an open working mode, the main purpose of the self-cleaning is to remove solid particle pollutants in an oil pump truck pipeline, and the solid particle pollution degree grade of oil liquid reaches the use requirement through continuous circulating cleaning; when the oil pump truck carries out self-loopa and washs, connect the oil supply with the oil return and connect the short circuit through the circulation, its work flow as follows:
the oil tank → the oil suction filter → the main system oil suction ball valve → the first double electric ball valve → the first motor pump group → the first check valve → the second first filter → the second filter → the second flow meter → the second oil supply hose → the first oil supply joint → the circulation joint → the first oil return hose → the first oil return filter → the first air-cooled radiator → the first double electric ball valve → the oil tank;
the main purpose of cleaning the aircraft hydraulic system is to remove solid particle pollutants in the aircraft hydraulic pipeline, when the oil pump vehicle cleans the aircraft hydraulic system, the pressure supply joint and the oil return joint are respectively butted with the aircraft through the aircraft-connecting joint, and the working flow is as follows:
the method comprises the steps of (1) oil tank → oil suction filter → main system oil suction ball valve → first double-connection electric ball valve → first motor pump group → first one-way valve → second first stage filter → second flow meter → second oil supply hose → first oil supply connector → machine-connected connector → aircraft hydraulic system → machine-connected connector → first oil return hose → first oil return filter → first air-cooled radiator → first double-connection electric ball valve → oil tank;
oil drainage work for the airplane:
when the aircraft hydraulic tank needs the oil drain, open "switching mode conversion" valve, with oil return path and oil pump car oil tank UNICOM, in the ground equipment oil tank is got back to the hydraulic tank on the aircraft to fluid under the effect of gravity, its work flow as follows:
the hydraulic oil tank → the joint → the first oil return hose → the first oil return filter → the first air-cooled radiator → the first double-acting electric ball valve → the oil tank.
The invention has the following beneficial effects:
1. by the system, hydraulic oil of the hydraulic system on the airplane can be used for providing hydraulic power with certain pressure, flow and temperature for No. 1, No. 2 and No. 3 hydraulic systems of the airplane, and corresponding maintenance or overhaul operation is further completed.
2. The system can provide hydraulic energy for the RAT detection equipment guarantee equipment by utilizing the self-contained oil tank.
3. The system can provide hydraulic energy for the equipment for ensuring the inspection equipment of the thrust reverser by utilizing the self-contained oil tank.
4. By the system, the cleanliness of the hydraulic oil can be ensured to meet the requirement of the pollution degree of an airplane hydraulic system during pressure supply.
5. The system has the functions of self-cleaning and cleaning the hydraulic system of the airplane.
6. By the system, the water can be removed from the hydraulic system of the airplane;
7. by the system, when the oil quantity of the hydraulic system of the airplane is insufficient, the towing oil pump vehicle can add hydraulic oil with the pollution degree meeting the requirement to oil tanks of No. 1, No. 2 and No. 3 hydraulic systems of the airplane.
8. The system of the invention can move under the traction of the motor vehicle.
9. The system can provide a 24-32 VDC direct current output power supply socket for other equipment.
10. The system has the function of stopping pressure supply in emergency.
Drawings
The invention is further illustrated by the following figures and examples.
FIG. 1 is a hydraulic system diagram of the present invention.
In the figure: an oil filling electromagnetic ball valve 1, a first oil suction electromagnetic ball valve 2, a second oil suction electromagnetic ball valve 2.1, an oil filling motor pump group 3, a first-stage filter 4, a second first-stage filter 4.1, a third first-stage filter 4.2, a fourth first-stage filter 4.3, a first second-stage filter 5, a second-stage filter 5.1, a third second-stage filter 5.2, a fourth second-stage filter 5.3, a first oil filling pressure sensor 6, a first flowmeter 7, a second flowmeter 7.1, a third flowmeter 7.3, a first oil supply hose 8, a second oil supply hose 8.1, a third oil supply hose 8.2, a fourth oil supply hose 8.2, an oil filling joint 9, a first two-position two-way electromagnetic valve 10, a second two-position two-way electromagnetic valve 10.1, a third two-position two-way electromagnetic valve 10.2, a fourth two-position two-way electromagnetic valve 10.3, a fifth two-position two-way electromagnetic valve 10.4, an oil filling safety valve 11, a vacuum pump 12, a condenser 13, a drain valve 14, a cooler 15, a vacuum filter 16.2, a vacuum filter, A throttle valve 17, a vacuum pressure gauge 18, a vacuum tank 19, a heating tank 20, a first oil drain ball valve 21, a second oil drain ball valve 21.1, a temperature sensor 22, a first oil suction ball valve 23, a main system oil suction ball valve 24, an oil suction filter 25, an oil tank 26, a liquid level meter 27, a granularity detector 28, a first oil supply temperature sensor 29, a second oil supply temperature sensor 29.1, a third oil supply temperature sensor 29.2, a first oil supply pressure sensor 30, a second oil supply pressure sensor 30.1, a third oil supply pressure sensor 30.2, a first side pressure/sampling valve 31, a second side pressure/sampling valve 31.1, a third side pressure/sampling valve 31.2, a first check valve 32, a first motor pump group 33, a first duplex electric ball valve 34, a second duplex electric ball valve 34.1, a third duplex electric ball valve 34.2, a first air-cooled radiator 35, a second air-cooled radiator 35.1, a third air-cooled radiator 35.2, The oil-return device comprises a first system safety valve 36, a first oil-return joint 37, a second oil-return joint 37.1, a third oil-return joint 37.2, a first oil-return hose 38, a second oil-return hose 38.1, a third oil-return hose 38.2, a first oil-return pressure sensor 39, a second oil-return pressure sensor 39.1, a third oil-return pressure sensor 39.2, a first sampling port 40, a second sampling port 40.1, a third sampling port 40.2, a first oil-return filter 41, a second oil-return filter 41.1, a third oil-return filter 41.2, a first oil-return safety valve 42, a second oil-return safety valve 42.1, a third oil-return safety valve 42.2, a second motor pump set 43, a third motor pump set 44, a first oil supply joint 45, a second oil supply joint 45.1 and a third oil supply joint 45.2.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
Example 1:
referring to fig. 1, the towed oil pump vehicle system includes a first oil supply system, a second oil supply system, and a third oil supply system for supplying oil to hydraulic systems No. 1, 2, and 3 of an aircraft, respectively; the system comprises a purification system for purifying oil of hydraulic systems of airplanes 1, 2 and 3; the system comprises a water removal system for removing water from oil of hydraulic systems of airplanes 1, 2 and 3; including fueling systems for fueling aircraft No. 1, 2, and 3 hydraulic systems. The hydraulic oil pump truck system can provide hydraulic power with certain pressure, flow and temperature for No. 1, No. 2 and No. 3 hydraulic systems of the airplane by utilizing the hydraulic oil of the hydraulic system on the airplane, and then corresponding maintenance or overhaul operation is completed.
Further, the first oil supply system, the second oil supply system and the third oil supply system adopt the same system structure; the first oil supply system comprises an oil absorption filter 25 arranged inside an oil tank 26, the oil absorption filter 25 is connected with a first duplex electric ball valve 34 through a main system oil absorption ball valve 24, the first duplex electric ball valve 34 is connected with a first motor pump set 33, the first motor pump set 33 is connected with a first one-way valve 32, the first one-way valve 32 is connected with a second-stage filter 4.1 and a second-stage filter 5.1, the second-stage filter 5.1 is connected with a second oil supply hose 8.1 through a second flowmeter 7.1, and the second oil supply hose 8.1 is connected with a first oil supply connector 45. The first oil supply system can provide pressure oil with different pressures for three groups of hydraulic systems of the airplane according to requirements. During operation, oil can be pumped by the first motor-pump group 33. Can generate three hydraulic systems with the pressure of 21.5Mpa and the flow rates of 150L/min, 150L/min and 80L/min respectively for scheme design.
Further, the device also comprises a first oil return joint 37, the first oil return joint 37 is connected with a first oil return hose 38, and a first oil return pressure sensor 39, a first sampling port 40, a first oil return filter 41 and a first oil return safety valve 42 are sequentially installed on the first oil return hose 38; a first air-cooled radiator 35 is arranged between the first oil return filter 41 and the first duplex electric ball valve 34; the first electric double ball valve 34 and the first oil return relief valve 42 are connected to the oil tank 26. Through foretell oil return system structure, can be used for the oil return, in the oil return process, realize the heat dissipation to fluid moreover through first air-cooled radiator 35. The radiator adopts an air cooling mode to radiate the oil liquid. The upstream pipeline of the radiator is provided with a temperature sensor, and the temperature of oil returning to the ground oil pump truck from the aircraft hydraulic system is displayed through a human-computer interface. The starting and stopping of the cooling fan can be controlled, and the alarm indication and the stopping treatment during the overtemperature can be controlled, so that the safety of an airplane hydraulic system and the safety of equipment can be guaranteed.
In addition, the system is provided with a pressure transmitter for monitoring the oil supply pressure, so that the output pressure of the oil pump truck is monitored, the alarm is given when the output pressure is higher than the lower limit of the pressure set value, and the vehicle is stopped when the output pressure is higher than the upper limit of the pressure set value. The pressure value is displayed on the human-computer interface. And the oil return pressure is monitored by a pressure transmitter, alarm is carried out when the oil return pressure is higher than the lower limit of the pressure set value, and the vehicle is stopped when the oil return pressure is higher than the upper limit of the pressure set value.
Furthermore, the components of the hydraulic system adopt a high-degree integrated design, internal channels and component plate type installation through integrated modules effectively reduce pipelines, reduce oil leakage links, improve reliability and service life, simplify internal structure and facilitate installation, maintenance and repair.
Further, a first oil supply temperature sensor 29, a first oil supply pressure sensor 30 and a first side pressure/sampling valve 31 are sequentially installed between the second secondary filter 5.1 and the second flow meter 7.1, and a first system safety valve 36 is installed between the second oil supply hose 8.1 and the first oil return hose 38. The first system pressure relief valve 36 can be used to regulate the pressure of the control system.
Further, the purification system comprises an oil tank 26, the oil tank 26 is connected with a second oil suction ball valve 23.1 through an oil suction filter 25, the second oil suction ball valve 23.1 is connected with a first oil suction electromagnetic ball valve 2, the first oil suction electromagnetic ball valve 2 is connected with an oil filling motor pump set 3, and a pipeline behind the oil filling motor pump set 3 is sequentially connected with a first primary filter 4, a first secondary filter 5, a first oil filling pressure sensor 6, a first flowmeter 7, a first oil supply hose 8 and an oil filling joint 9; an oil filling safety valve 11 is arranged between the first secondary filter 5 and the first flow meter 7; the first oil suction electromagnetic ball valve 2 is connected with the oil filling electromagnetic ball valve 1 in parallel. The purification system can be used for effectively filtering and purifying hydraulic oil of an oil pump truck system or an airplane.
Further, the water removal system comprises an oil tank 26, the oil tank 26 is connected with a heating tank 20 through a first oil absorption ball valve 23, the heating tank 20 is connected with a vacuum tank 19 through a second two-position two-way electromagnetic valve 10.1, and the vacuum tank 19 is connected with an oil filling motor pump set 3 of the purification system through a second oil absorption electromagnetic ball valve 2.1; the vacuum tank 19 is connected with the condenser tank 13 through the cooler 15, and the condenser tank 13 is provided with the vacuum pump 12. The water removal system can be used for effectively removing water from hydraulic oil of an airplane.
In the specific working process, a vacuum pump set is started, the opening of the air filter throttle valve is gradually adjusted, and the vacuum degree in the oil tank reaches 50 KPa-80 KPa. Set up pressure dispersion and filler and disperse the two-stage and diverge the device in the oil tank, make fluid carry out the contact of maximum surface area with vacuum environment more evenly densely, the steam in the fluid expands 4 ~ 5 times rapidly and escapes from fluid to being taken away by the vacuum pump, reaching the dewatering effect, fluid can reach the requirement that the water content is less than 100ug/g and 100PPm gradually after the vacuum dewatering that relapses is handled through the fuel delivery pump promotion.
Further, a temperature sensor 22 is mounted on the heating tank 20; a vacuum pressure gauge 18 is arranged on the vacuum tank 19; the vacuum tank 19 is provided with a vacuum filter 16 through a throttle valve 17.
Before the oil enters the vacuum oil tank, a heating tank 20 is arranged, and the heating tank 20 is controlled by a temperature control instrument to be constant temperature. The oil liquid can improve the dehydration effect after being heated to a proper temperature, and is suitable for being used under the condition of lower atmospheric temperature.
Furthermore, the refueling system and the purification system share one set of system.
Furthermore, the first oil supply system, the second oil supply system, the third oil supply system and the purification system are respectively connected with a pollution degree monitoring system for detecting the pollution degree grade of oil in an oil tank of the oil pump truck on line, and the pollution degree monitoring system comprises a first two-position two-way electromagnetic valve 10 and a third two-position two-way electromagnetic valve 10.2 which are respectively connected with the first oil supply system and the purification system correspondingly; the first two-position two-way electromagnetic valve 10 and the third two-position two-way electromagnetic valve 10.2 are both connected with a granularity detector 28, and the granularity detector 28 is connected and communicated with the oil tank 26; the granularity detector 28 is used for monitoring the oil particle pollution degree of various hydraulic and lubricating systems in real time, has a printing function and can print a detection report in real time.
The electric control elements of the first oil supply system, the second oil supply system, the third oil supply system, the purification system, the water removal system and the oil adding system are respectively connected with the electric control system and control the systems to realize corresponding system functions;
furthermore, the electrical control system comprises a PLC control module, a touch screen, a power module, a transformer, a phase sequence protector, a servo motor, a servo driver, a filter, a temperature sensor, a pressure sensor, a flow sensor, a liquid level sensor and a valve controller.
Example 2:
the control method of the dragging type oil pump vehicle system comprises the following steps:
hydraulic sources are provided for hydraulic systems No. 1, 2 and 3 of the aircraft:
when a hydraulic source is provided for No. 1, 2 and 3 hydraulic systems of the airplane, hydraulic oil of the hydraulic systems on the airplane is required to be used, and at the moment, the oil pump truck works in a closed state; when the closed state is selected for working, the corresponding duplex electric ball valve is automatically reversed, the connection with the oil pump vehicle oil tank 26 is cut off, the oil pump vehicle is connected with the ground pump oil suction connector of the airplane through the oil return connector, and due to the back pressure effect of the overflow valve, the oil returned from the airplane hydraulic oil tank directly returns to the oil suction end of the ground system motor pump set through the oil return pipeline of the oil pump vehicle, so that the oil pump vehicle oil tank does not participate in the working, is in a completely 'closed' state, is favorable for keeping the liquid level of the airplane oil tank balanced, and does not blow by the airplane oil tank and the oil pump vehicle oil tank under the state, and the working flow is as follows:
airplane oil return → oil return joint → oil return hose → oil return filter → air cooling radiator → double electric ball valve → motor pump group → one-way valve → first oil filter → second oil filter → flowmeter → oil supply switch → oil supply hose → oil supply joint → airplane;
oil purification, water removal and refueling to the aircraft:
when the oil quantity of the airplane hydraulic system is insufficient, the oil pump vehicle can add hydraulic oil with the pollution degree meeting the requirements into oil tanks of No. 1, No. 2 and No. 3 hydraulic systems of the airplane, remove solid particle pollutants and water in the oil liquid through self-circulation purification, and enable the grade of the pollution degree of the solid particles and the water content of the oil liquid to meet the use requirements through continuous circulation;
the oil liquid purification process comprises the following steps:
the oil tank 26 → the oil suction filter 25 → the second oil suction ball valve 23.1 → the first oil suction electromagnetic ball valve 2 → the oil filling motor pump group 3 → the first stage filter 4 → the first stage filter 5 → the first oil filling pressure sensor 6 → the oil filling safety valve 11 → the oil tank 26;
the oil liquid dewatering process comprises the following steps:
the oil tank 26 → the first oil suction ball valve 23 → the heating tank 20 → the second two-position two-way solenoid valve 10.1 → the vacuum tank 19 → the second oil suction ball valve 2.1 → the refueling motor-pump unit 3 → the first-stage filter 4 → the first second-stage filter 5 → the first refueling pressure sensor 6 → the refueling safety valve 11 → the oil tank 26;
the procedure for refuelling the aircraft is as follows:
the fuel tank 26 → the fuel suction filter 25 → the second fuel suction ball valve 23.1 → the first fuel suction electromagnetic ball valve 2 → the fuel filling motor pump group 3 → the first stage filter 4 → the first stage filter 5 → the first fuel filling pressure sensor 6 → the first flow meter 7 → the first fuel supply hose 8 → the fuel filling joint 9 → the aircraft;
the oiling motor-pump set 3 and the motor-pump set 33 can not work simultaneously, and the oiling motor-pump set and the motor-pump set are interlocked through electrical control;
the three electromagnetic ball valves, namely the oil filling electromagnetic ball valve 1, the first oil absorption electromagnetic ball valve 2 and the second oil absorption electromagnetic ball valve 2.1, can be opened only one at a time, and the three are electrically controlled and interlocked;
self-cleaning of the oil pump truck and cleaning of the aircraft hydraulic system:
the self-cleaning of the oil pump truck and the cleaning of an airplane hydraulic system both use an oil pump truck oil tank and are in an open working mode, the main purpose of the self-cleaning is to remove solid particle pollutants in an oil pump truck pipeline, and the solid particle pollution degree grade of oil liquid reaches the use requirement through continuous circulating cleaning; when the oil pump truck carries out self-loopa and washs, connect the oil supply with the oil return and connect the short circuit through the circulation, its work flow as follows:
the oil tank 26 → the oil suction filter 25 → the main system oil suction ball valve 24 → the first two-way electric ball valve 34 → the first motor pump group 33 → the first check valve 32 → the second first-stage filter 4.1 → the second-stage filter 5.1 → the second flow meter 7.1 → the second oil supply hose 8.1 → the first oil supply joint 45 → the circulation joint → the first oil return joint 37 → the first oil return hose 38 → the first oil return filter 41 → the first air-cooled radiator 35 → the first two-way electric ball valve 34 → the oil tank 26;
the main purpose of cleaning the aircraft hydraulic system is to remove solid particle pollutants in the aircraft hydraulic pipeline, when the oil pump vehicle cleans the aircraft hydraulic system, the pressure supply joint and the oil return joint are respectively butted with the aircraft through the aircraft-connecting joint, and the working flow is as follows:
the oil tank 26 → the oil suction filter 25 → the main system oil suction ball valve 24 → the first dual electric ball valve 34 → the first motor pump set 33 → the first check valve 32 → the second first stage filter 4.1 → the second stage filter 5.1 → the second flow meter 7.1 → the second oil supply hose 8.1 → the first oil supply joint 45 → the aircraft joining joint → the aircraft hydraulic system → the aircraft joining joint → the first oil return joint 37 → the first oil return hose 38 → the first oil return filter 41 → the first air-cooled radiator 35 → the first dual electric ball valve 34 → the oil tank 26;
when an airplane hydraulic system is cleaned, a variable cleaning program is selected, so that the main oil pump generates flow pulsation in a period of 240s, wherein the first 60s of each period is small flow, and the last 180s of each period is large flow, so that the oil flow speed of a hydraulic pipeline correspondingly changes along with the change of the flow, particularly instantaneous impact from the small flow to the large flow can achieve an effective cleaning effect.
Oil drainage work for the airplane:
when the aircraft hydraulic tank needs the oil drain, open "switching mode conversion" valve, with oil return path and oil pump car oil tank UNICOM, in the ground equipment oil tank is got back to the hydraulic tank on the aircraft to fluid under the effect of gravity, its work flow as follows:
the hydraulic oil tank of the airplane → the joint-making connector → the first oil return connector 37 → the first oil return hose 38 → the first oil return filter 41 → the first air-cooled radiator 35 → the first double-acting electric ball valve 34 → the oil tank 26.
The oil pump vehicle has the greatest characteristic that the opening and closing type switching can be completely and automatically carried out aiming at the test of a certain type of airplane and the self circulation cleaning. This function is inventive. When the closed system works, the overflow valve is completely closed, and the liquid level of the aircraft fuel tank can be effectively kept unchanged. The overflow valve has the function of a safety valve when the oil pump works for circulating cleaning and oiling. The back pressure valve is also beneficial to the preparation work of the airplane before debugging, so that all pipelines and hydraulic components in the system are filled with oil, and gas is exhausted.
Furthermore, the system is provided with an oil supply pressure detection interface and an oil return pressure detection interface, and real-time monitoring of the oil pressure through the control system ensures that oil cannot be sucked empty, so that the pump is damaged.
Furthermore, the oil pump vehicle adopts a proportional control technology to realize proportional adjustment of pressure and flow of the hydraulic system.
Furthermore, the oil pump car driver and the oil pump car driver are designed to be a man-machine interface in a man-machine interaction mode, and good controllability is achieved.
Example 3:
setting a system safety valve: a safety valve is arranged between the pressure supply system and the oil return system of the oil pump truck. An overflow valve of an original inlet is selected, the maximum working pressure is 25MPa, the nominal flow is 220L/min, and the maximum working pressure can be manually adjusted. When the system pressure is greater than the highest mechanical set pressure value by 23.5MPa, the safety valve is opened to protect the safety and stability of the hydraulic system of the airplane and the hydraulic system of the oil pump truck.
The oil pump truck refueling system is provided with a safety valve for limiting the highest output pressure of the refueling pump, and the delivery pressure is set to be 0.7 MPa.
Example 4:
system pressure and flow regulation: the pressure of the oil pump truck is regulated by a pilot pressure valve at the oil pump to regulate the output pressure of the system. This scheme adopts long-range electric proportional mode to adjust oil pump guide's pressure valve, carries out the guide control, and guide's pressure valve direct action makes the oil pump carry out output pressure according to long-range air-vent valve setting value in the oil pump. Compared with the traditional system pressure regulating mode, the mode has the advantages that the generated heat is greatly reduced, the consumed power is reduced, and the pressure control precision is improved in multiples. The oil pump truck is beneficial to long-time work, the temperature of oil liquid is not over-temperature, and the pressure regulation of the oil pump truck is more stable and reliable.
The flow regulation can be regulated and controlled by a proportional displacement controller at the oil pump, and the oil pump outputs the displacement given by the electronic command signal through the remote electronic command signal.
Example 5:
a filtering system: the cleanliness of the hydraulic system is improved, and the oil filter with high performance is correctly selected. The technical indexes of the oil filter are analyzed and determined from the experience of the past application and the market research condition, and the oil filter system is required to have high filtering precision, strong filtering capacity and pollutant carrying capacity so as to meet the solid particle pollution degree index, shorten the cleaning time of the oil pump truck and prolong the replacement period of the filter element.
In order to achieve the design index, the filtering precision of the pressure supply system is selected to be 3um, the filtering capacity beta x is more than or equal to 200, the flow is more than 1.5 times of the flow of the system, and the oil filter has strong dirt holding capacity.
The oil filter of Hedek company is arranged in the oil return system pipeline, and can effectively filter solid particles above 25um, so that higher solid particle pollution degree index is achieved. All the oil filters in the system are equipped with an electrified transmitter to prevent the normal operation of the system from being affected by the blockage of the oil filters. And when the pollution degree of the hydraulic system of the oil pump truck exceeds the standard, the self-circulation cleaning of the oil pump truck is realized by a sampling self-circulation cleaning program.
This scheme is provided with the two-stage filter in filtration system, 10um and 3um precision, in the dewatering, filters the solid particle in the fluid in the lump, has improved oil pump car operating efficiency.
When the solid pollution degree of oil liquid of the oil pump vehicle needs to be detected off line, an oil sample can be collected at a sampling valve arranged in the system for testing, and the GJB420B 6 level requirement is met.
Example 6:
online detection: the oil pump truck is provided with an online solid pollution degree detector, can detect the pollution degree grade of oil in an oil tank of the oil pump truck in real time on line and display the pollution degree grade on a touch screen in real time. The pollution degree monitoring system is an intelligent system which takes a particle counter as a core and adopts a human-computer interface to display, alarm and operate human-computer interaction on line. The granularity counter adopts a KZ-1 online granularity counter, is suitable for on-site online measurement, is used for monitoring the oil particle pollution degree of various hydraulic and lubricating systems in real time, has a printing function, and can print a detection report in real time. The device is simple and convenient to install and operate, and can be widely applied to the fields of aviation, aerospace, electric power, petroleum, chemical engineering, traffic, ports, metallurgy, research institutes, hydraulic machinery and the like. The particle counter has the following main performance characteristics:
is developed by adopting a light shading principle of a light resistance method.
The standard such AS NAS1638, GJB420B, ISO4406, AS4059 and the like is built in, and the instrument can be calibrated according to ISO4402 or ISO 11171.
The abrasion trend of the hydraulic system can be mastered and analyzed in real time on line, in real time and continuously sampled.
The large screen Chinese liquid crystal display screen displays and the thin film touch key operation.
The device is provided with a standard serial RS232 port, can be externally connected with a computer to store detection results, and is convenient for data classification and retrieval.
The method has the advantages of high detection speed, high precision, good repeatability and the like.
Economical and practical, small-sized and light-weight, and easy to install.
Strong anti-interference performance, high temperature and high pressure resistance, firm shell and capability of being used in severe environment.
Example 7:
a PLC control module: the PLC control module adopts Siemens S7-1200 series PLC, and combines with the input/output module, the power supply module and the communication module to read data transmitted by each sensor in the equipment and carry out various function control such as logic control, sequential control, analog control, multi-machine communication and the like, thereby realizing various function requirements of the oil pump truck.
The PLC control module has the following characteristics:
1. the reliability is high. Because most of the PLCs adopt single-chip microcomputers, the integration level is high, and the reliability of the system is improved by adding corresponding protection circuits and self-diagnosis functions.
2. Programming is easy. The PLC programming mostly adopts relay control ladder diagrams and command sentences, the number of the PLC programming is much less than that of microcomputer instructions, and the general small-sized PLC except for medium-grade and high-grade PLCs has about 16. Because the ladder diagram is vivid and simple, the ladder diagram is easy to master and convenient to use, and can be programmed even without computer professional knowledge.
3. The configuration is flexible. Because the PLC adopts a building block type structure, a user can flexibly change the function and the scale of the control system only by simply combining, and therefore, the PLC is suitable for any control system.
4. The input/output function module is complete. One of the biggest advantages of the PLC is that corresponding templates can be directly connected with devices (such as buttons, switches, current transducer, motor starter or control valve) in the industrial field according to different field signals (such as direct current or alternating current, switching value, digital value or analog value, voltage or current, and the like), and are connected with a CPU mainboard through a bus.
5. The installation is convenient. In contrast to computer systems, neither a dedicated machine room nor strict shielding measures are required for the installation of the PLC. When the device is used, the device can normally work only by correctly connecting the detection device with the execution mechanism and the I/O interface terminal of the PLC.
6. The running speed is high. Since the control of the PLC is performed by program control, the reliability and the operation speed of the PLC are not comparable to those of the relay logic control.
A touch screen: the touch screen adopts a Siemens 9-inch screen, and all states of equipment operation including pressure, flow, temperature, motor operation state, valve opening state and the like can be checked on the screen. And can realize the control of all executive components on the screen, such as the opening and closing of an electric valve, the running and the stopping of a motor, and all operations of circulating filtration, pressure supply and flow supply, vacuum water removal and the like. The touch screen has the following characteristics:
1. the touch screen operation and the keys capable of being configured randomly support various combination operations;
2. carrying out project transmission, data archiving and keyboard and mouse connection through USB connection;
3. supporting PROFIBUS or PROFINET communication;
4. corrosion resistance to corrosive gases, chemicals, biological, mechanically active substances, and salt spray erosion;
5. can be operated in condensation and icing environment;
6. the expansion temperature range is-40 to +70 ℃;
7. can be installed at the altitude of-1000 to 5000 meters;
a servo motor: the driving motor is different from the prior oil pump vehicle and selects a servo motor. 1. A66 kW servo motor is selected for the system 2, a 33kW servo motor is selected for the system 3, and the rated rotating speeds of the motors are 2000r/min and can reach 2500r/min at most. If the asynchronous motor is selected, only 75kW power can be selected, so that the servo motor can be selected to have relatively small power, waste is avoided, and meanwhile, the motor volume is smaller than that of a three-phase asynchronous motor, and the space is saved.
A temperature sensor: the temperature sensor adopts a Coulomb force temperature sensor, the measurement range is-20-100 ℃, and the temperature sensor is mainly used for monitoring the oil temperature of the heating tank and the oil supply port in real time. The temperature monitoring of the heating tank is mainly used for feeding back the temperature to the temperature controller to control the heating temperature of the oil liquid. The temperature monitoring of the oil supply port displays the temperature of the oil supplied to the aircraft through the touch screen. And the start and stop of the cooling fan can be controlled, and the alarm indication and stop processing during overtemperature can be controlled, so that the safety of the hydraulic system and the equipment of the airplane can be guaranteed.
A pressure sensor: the system is provided with a pressure sensor for monitoring the oil supply pressure, so that the output pressure of the test vehicle is monitored, the alarm is given when the output pressure is higher than the lower limit of the pressure set value, and the vehicle is stopped when the output pressure is higher than the upper limit of the pressure set value. The pressure value is displayed on the touch screen. And the oil return pressure is monitored by a pressure transmitter, alarm is carried out when the oil return pressure is higher than the lower limit of the pressure set value, and the vehicle is stopped when the oil return pressure is higher than the upper limit of the pressure set value. The oil filler hole sets for pressure sensor, and when pressure was higher than the set pressure value, the system was shut down, avoided damaging aircraft pipeline and oil tank.
Claims (10)
1. Towed oil pump car system, its characterized in that: the system comprises a first oil supply system, a second oil supply system and a third oil supply system which are used for respectively supplying oil to No. 1, No. 2 and No. 3 hydraulic systems of the airplane;
the system comprises a purification system for purifying oil of hydraulic systems of No. 1, No. 2 and No. 3 airplanes;
the system comprises a water removal system for removing water from oil of hydraulic systems of airplanes 1, 2 and 3;
including fueling systems for fueling aircraft No. 1, 2, and 3 hydraulic systems.
2. The towed pump vehicle system of claim 1, wherein: the first oil supply system, the second oil supply system and the third oil supply system adopt the same system structure;
the first oil supply system comprises an oil absorption filter (25) arranged in an oil tank (26), the oil absorption filter (25) is connected with a first duplex electric ball valve (34) through a main system oil absorption ball valve (24), the first duplex electric ball valve (34) is connected with a first motor pump set (33), the first motor pump set (33) is connected with a first one-way valve (32), the first one-way valve (32) is connected with a second one-stage filter (4.1) and a second two-stage filter (5.1), the second two-stage filter (5.1) is connected with a second oil supply hose (8.1) through a second flowmeter (7.1), and the second oil supply hose (8.1) is connected with a first oil supply connector (45);
the device also comprises a first oil return joint (37), the first oil return joint (37) is connected with a first oil return hose (38), and a first oil return pressure sensor (39), a first sampling port (40), a first oil return filter (41) and a first oil return safety valve (42) are sequentially arranged on the first oil return hose (38); a first air-cooled radiator (35) is arranged between the first oil return filter (41) and the first duplex electric ball valve (34); and the oil return pipes of the first duplex electric ball valve (34) and the first oil return safety valve (42) are connected with an oil tank (26).
3. The towed pump vehicle system of claim 2, wherein: a first oil supply temperature sensor (29), a first oil supply pressure sensor (30) and a first side pressure/sampling valve (31) are sequentially arranged between the second secondary filter (5.1) and the second flowmeter (7.1), and a first system safety valve (36) is arranged between the second oil supply hose (8.1) and the first oil return hose (38).
4. The towed pump vehicle system of claim 1, wherein: the purification system comprises an oil tank (26), the oil tank (26) is connected with a second oil absorption ball valve (23.1) through an oil absorption filter (25), the second oil absorption ball valve (23.1) is connected with a first oil absorption electromagnetic ball valve (2), the first oil absorption electromagnetic ball valve (2) is connected with an oil filling motor pump set (3), and a pipeline behind the oil filling motor pump set (3) is sequentially connected with a first primary filter (4), a first secondary filter (5), a first oil filling pressure sensor (6), a first flowmeter (7), a first oil supply hose (8) and an oil filling connector (9); an oil filling safety valve (11) is arranged between the first secondary filter (5) and the first flowmeter (7); the first oil suction electromagnetic ball valve (2) is connected with the oil filling electromagnetic ball valve (1) in parallel.
5. The towed pump vehicle system of claim 1, wherein: the water removal system comprises an oil tank (26), the oil tank (26) is connected with a heating tank (20) through a first oil absorption ball valve (23), the heating tank (20) is connected with a vacuum tank (19) through a second two-position two-way electromagnetic valve (10.1), and the vacuum tank (19) is connected with an oil filling motor pump set (3) of the purification system through a second oil absorption electromagnetic ball valve (2.1);
the vacuum tank (19) is connected with the condensing box (13) through the cooler (15), and the condensing box (13) is provided with the vacuum pump (12).
6. The towed pump vehicle system of claim 5, wherein: a temperature sensor (22) is arranged on the heating tank (20); a vacuum pressure gauge (18) is arranged on the vacuum tank (19); and a vacuum filter (16) is arranged on the vacuum tank (19) through a throttle valve (17).
7. The towed pump vehicle system of claim 1, wherein: the refueling system and the purification system share one set of system.
8. The towed pump vehicle system of claim 1, wherein: the first oil supply system, the second oil supply system, the third oil supply system and the purification system are respectively connected with a pollution degree monitoring system for detecting the pollution degree grade of oil in an oil tank of the oil pump truck on line, and the pollution degree monitoring system comprises a first two-position two-way electromagnetic valve (10) and a third two-position two-way electromagnetic valve (10.2) which are respectively connected with the first oil supply system and the purification system correspondingly; the first two-position two-way electromagnetic valve (10) and the third two-position two-way electromagnetic valve (10.2) are both connected with a granularity detector (28), and the granularity detector (28) is connected and communicated with an oil tank (26); the granularity detector (28) is used for monitoring the oil particle pollution degree of various hydraulic and lubricating systems in real time, has a printing function and can print a detection report in real time.
9. The towed pump vehicle system of claim 1, wherein: the electric control elements of the first oil supply system, the second oil supply system, the third oil supply system, the purification system, the water removal system and the oil adding system are respectively connected with the electric control system and control the systems to realize corresponding system functions;
the electric control system comprises a PLC control module, a touch screen, a power supply module, a transformer, a phase sequence protector, a servo motor, a driver, a filter, a temperature sensor, a pressure sensor, a flow sensor, a liquid level sensor and a valve controller.
10. The control method of the towed pump vehicle system, as set forth in any one of claims 1 to 9, wherein:
hydraulic sources are provided for hydraulic systems No. 1, 2 and 3 of the aircraft:
when a hydraulic source is provided for No. 1, 2 and 3 hydraulic systems of the airplane, hydraulic oil of the hydraulic systems on the airplane is required to be used, and at the moment, the oil pump truck works in a closed state; when selecting closed state work, corresponding pair electric ball valve automatic reversing cuts off the contact with oil pump car oil tank (26), the oil pump car links to each other through oil return joint and the ground pump oil absorption of aircraft connects, because overflow valve backpressure effect, the fluid that returns from aircraft hydraulic tank directly gets back to ground system motor pump group oil absorption end through the oil return pipeline of oil pump car, like this oil pump car oil tank does not participate in work, be in complete "closed" state, be favorable to aircraft oil tank's liquid level to keep balance, aircraft oil tank and oil pump car oil tank are not scurrying oil under this state, its working procedure is as follows:
airplane oil return → oil return joint → oil return hose → oil return filter → air cooling radiator → double electric ball valve → motor pump group → one-way valve → first oil filter → second oil filter → flowmeter → oil supply switch → oil supply hose → oil supply joint → airplane;
oil purification, water removal and refueling to the aircraft:
when the oil quantity of the airplane hydraulic system is insufficient, the oil pump vehicle can add hydraulic oil with the pollution degree meeting the requirements into oil tanks of No. 1, No. 2 and No. 3 hydraulic systems of the airplane, remove solid particle pollutants and water in the oil liquid through self-circulation purification, and enable the grade of the pollution degree of the solid particles and the water content of the oil liquid to meet the use requirements through continuous circulation;
the oil liquid purification process comprises the following steps:
the oil tank (26) → oil suction filter (25) → second oil suction ball valve (23.1) → first oil suction electromagnetic ball valve (2) → oil filling motor pump set (3) → first stage filter (4) → first stage filter (5) → first oil filling pressure sensor (6) → oil filling safety valve (11) → oil tank (26);
the oil liquid dewatering process comprises the following steps:
the oil tank (26) → the first oil suction ball valve (23) → the heating tank (20) → the second two-position two-way electromagnetic valve (10.1) → the vacuum tank (19) → the second oil suction electromagnetic ball valve (2.1) → the oiling motor pump set (3) → the first stage filter (4) → the first stage filter (5) → the first oiling pressure sensor (6) → the oiling safety valve (11) → the oil tank (26);
the procedure for refueling the aircraft is as follows:
the method comprises the following steps that (1) a fuel tank (26) → an oil suction filter (25) → a second oil suction ball valve (23.1) → a first oil suction electromagnetic ball valve (2) → a refueling motor pump set (3) → a first stage filter (4) → a first stage filter (5) → a first refueling pressure sensor (6) → a first flow meter (7) → a first oil supply hose (8) → a refueling joint (9) → the aircraft;
the oiling motor-pump set (3) and the motor-pump set (33) cannot work simultaneously, and the oiling motor-pump set and the motor-pump set are interlocked through electrical control;
the oil filling electromagnetic ball valve (1), the first oil absorption electromagnetic ball valve (2) and the second oil absorption electromagnetic ball valve (2.1) can be opened only one at a time, and the three are electrically controlled and interlocked;
self-cleaning of the oil pump truck and cleaning of the aircraft hydraulic system:
the self-cleaning of the oil pump truck and the cleaning of an airplane hydraulic system both use an oil pump truck oil tank and are in an open working mode, the main purpose of the self-cleaning is to remove solid particle pollutants in an oil pump truck pipeline, and the solid particle pollution degree grade of oil liquid reaches the use requirement through continuous circulating cleaning; when the oil pump truck carries out self-loopa and washs, connect the oil supply with the oil return and connect the short circuit through the circulation, its work flow as follows:
the method comprises the following steps that (1) the oil tank (26) → the oil absorption filter (25) → the main system oil absorption ball valve (24) → the first double-linkage electric ball valve (34) → the first motor pump set (33) → the first one-way valve (32) → the second one-stage filter (4.1) → the second two-stage filter (5.1) → the second flow meter (7.1) → the second oil supply hose (8.1) → the first oil supply joint (45) → the circulation joint → the first oil return joint (37) → the first oil return hose (38) → the first oil return filter (41) → the first air-cooling radiator (35) → the first double-linkage electric ball valve (34) → the oil tank (26);
the main purpose of cleaning the aircraft hydraulic system is to remove solid particle pollutants in the aircraft hydraulic pipeline, when the oil pump vehicle cleans the aircraft hydraulic system, the pressure supply joint and the oil return joint are respectively butted with the aircraft through the aircraft-connecting joint, and the working flow is as follows:
the method comprises the following steps that (1) an oil tank (26) → an oil suction filter (25) → a main system oil suction ball valve (24) → a first double-linkage electric ball valve (34) → a first motor pump set (33) → a first one-way valve (32) → a second one-stage filter (4.1) → a second two-stage filter (5.1) → a second flow meter (7.1) → a second oil supply hose (8.1) → a first oil supply joint (45) → an aircraft hydraulic system → an aircraft joint → a first oil return joint (37) → a first oil return hose (38) → a first oil return filter (41) → a first air-cooled radiator (35) → a first double-linkage electric ball valve (34) → an oil tank (26);
oil drainage work for the airplane:
when the aircraft hydraulic tank needs the oil drain, open "switching mode conversion" valve, with oil return path and oil pump car oil tank UNICOM, in ground equipment oil tank is got back to hydraulic tank from the aircraft to fluid under the effect of gravity, its work flow as follows:
the airplane hydraulic oil tank → the aircraft-on joint → the first oil return joint (37) → the first oil return hose (38) → the first oil return filter (41) → the first air-cooled radiator (35) → the first dual-coupling electric ball valve (34) → the oil tank (26).
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| CN114922883A (en) * | 2022-05-27 | 2022-08-19 | 中国人民解放军92228部队 | Hydraulic system and method for measuring wear characteristics of hydraulic fluid |
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| CN114458661B (en) | 2024-03-29 |
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