CN111237291B - Performance test stand for phosphate oil hydraulic oil tank - Google Patents
Performance test stand for phosphate oil hydraulic oil tank Download PDFInfo
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- CN111237291B CN111237291B CN201911405540.7A CN201911405540A CN111237291B CN 111237291 B CN111237291 B CN 111237291B CN 201911405540 A CN201911405540 A CN 201911405540A CN 111237291 B CN111237291 B CN 111237291B
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- 239000003921 oil Substances 0.000 title claims abstract description 155
- 239000010720 hydraulic oil Substances 0.000 title claims abstract description 24
- 238000011056 performance test Methods 0.000 title claims abstract description 18
- 229910019142 PO4 Inorganic materials 0.000 title claims abstract description 11
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 title claims abstract description 11
- 239000010452 phosphate Substances 0.000 title claims abstract description 11
- 238000004140 cleaning Methods 0.000 claims abstract description 21
- 238000005259 measurement Methods 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 238000003860 storage Methods 0.000 claims abstract description 14
- 239000010696 ester oil Substances 0.000 claims abstract description 8
- 238000009826 distribution Methods 0.000 claims abstract description 7
- 238000012545 processing Methods 0.000 claims abstract description 7
- 230000001105 regulatory effect Effects 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 230000001276 controlling effect Effects 0.000 claims description 8
- 230000010349 pulsation Effects 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 2
- 239000000498 cooling water Substances 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 34
- 238000007689 inspection Methods 0.000 abstract description 4
- 230000003750 conditioning effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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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
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/855—Testing of fluid pressure systems
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a performance test bed for a phosphate ester oil hydraulic oil tank, which comprises a high-pressure system, a low-pressure system, an oil temperature control and self-cleaning system, a measurement and control system and a bed body, wherein the high-pressure system is connected with the low-pressure system through a pipeline; the high-pressure system is used for adjusting the pressure and the flow of the pressurizing cavity; the low-pressure system is used for adjusting the pressure and the flow of the oil storage cavity; the oil temperature control and self-cleaning system is used for realizing the hydraulic oil temperature control of the hydraulic system and the self-cleaning capability of the oil liquid; the measurement and control system is mainly used for realizing parameter adjustment, data acquisition and processing and power distribution protection of the hydraulic system; the table body is used for mounting a tested piece. The invention can complete the test determination of the performance parameters of the supercharged oil tank, such as flexibility, running-in, functional inspection, pressure and pressure resistance of the oil storage cavity, flow impact and the like, which are specified by the standard.
Description
Technical Field
The invention relates to the technical field of pressurized oil tanks, in particular to a performance test bed for a phosphate oil hydraulic oil tank.
Background
Whether the working performance of the pressurized oil tank meets the technical requirements or not directly influences whether the aircraft hydraulic system can work normally or not, and even causes major flight accidents, so that the pressurized oil tank is one of key accessories for regular maintenance of a using unit.
Yangtao et al propose a pressurized oil tank test bed of a hydraulic system in the design of a pressurized oil tank test bed of a certain airplane, wherein the pressurized oil tank test bed consists of a hydraulic pump station, a performance test part and an electrical control part and is used for testing and measuring performance parameters such as the flexibility, running-in, function check, pressure and pressure resistance of an oil storage cavity, flow impact and the like of the pressurized oil tank specified by the standard. The scheme designed in the paper has relatively few types of experiments, and the self-cleaning capability of the oil is relatively weak.
Disclosure of Invention
The invention aims to provide a performance test bed for a phosphate ester oil hydraulic oil tank.
The technical scheme for realizing the purpose of the invention is as follows: a performance test bed for a phosphate ester oil hydraulic oil tank comprises a high-pressure system, a low-pressure system, an oil temperature control and self-cleaning system, a measurement and control system and a bed body;
the high-pressure system is used for adjusting the pressure and the flow of the pressurizing cavity; the low-pressure system is used for adjusting the pressure and the flow of the oil storage cavity; the oil temperature control and self-cleaning system is used for realizing the hydraulic oil temperature control and the self-cleaning of oil liquid of the hydraulic system; the measurement and control system is mainly used for realizing parameter adjustment, data acquisition and processing and power distribution protection of the hydraulic system; the table body is used for mounting a tested piece.
Compared with the prior art, the invention has the following remarkable advantages: (1) the oil tank performance test bed provides hydraulic oil with stable pressure, flow and temperature meeting the test requirements for a hydraulic oil tank test, and is used for debugging, acceptance inspection, normal-temperature service life performance test and other work of a civil aircraft hydraulic system self-pressurization oil tank product; (2) the invention has the advantages of high automation degree, complete testing parameters, accuracy, reliability and convenient maintenance.
Drawings
FIG. 1 is a hydraulic subsystem schematic diagram of a performance test bed of a phosphate ester oil hydraulic oil tank.
In the figure: 1 oil tank, 2 low-pressure switch, 3 liquid level meter, 4 thermometer, 5 liquid level switch, 6 first plunger pump, 7 first alternating current motor, 8 first oil filter, 9 first overflow valve, 10 first proportional overflow valve, 11 throttle valve, 12 first pressure/temperature sensor, 13, first quick-change connector, 14 tested oil tank, 15 first butterfly valve, 16 low-pressure gear pump, 17 variable frequency motor, 18 second oil filter, 19 second overflow valve, 20 proportional speed control valve, 21 second proportional overflow valve, 22 electromagnetic ball valve, 23 second pressure/temperature sensor, 24 first flowmeter, 25 second quick-change connector, 26 second butterfly valve, 27 circulating pump, 28 second alternating current motor, 29 pressure gauge, 30 third oil filter, 31 fourth oil filter, 32 radiator, 33 proportional water valve, 34 third quick-change connector, 35 fourth quick-change connector, 36 third pressure sensor, 37 first electric ball valve, 9 second electric motor, 9 first oil filter, 9 second overflow valve, 30 second oil filter, 31 fourth oil filter, 32 radiator, 33 proportional water valve, 34 third, 38 second electric ball valve, 39 second flow meter, 40 third flow meter, 41 second manual ball valve, 42 measuring cup, 43 water filter, 44 first manual ball valve, 45 third manual ball valve, 46 second plunger pump, 47 third alternating current motor, 48 high pressure filter, 49 safety valve, 50 third proportional overflow valve, 51 manual throttle valve, 52 air cleaner, 53 oil tank, 54 pulsation attenuator
Detailed Description
A performance test bed for a phosphate ester oil hydraulic oil tank comprises a 35Mpa high-pressure system, a 3Mpa low-pressure system, an oil temperature control and self-cleaning system, a measurement and control system and a bed body;
the high-pressure system is used for adjusting the pressure and the flow of the pressurizing cavity; the low-pressure system is used for adjusting the pressure and the flow of the oil storage cavity; the oil temperature control and self-cleaning system is used for realizing the hydraulic oil temperature control and the self-cleaning of oil liquid of the hydraulic system; the measurement and control system is mainly used for realizing parameter adjustment, data acquisition and processing and power distribution protection of the hydraulic system; the table body is used for mounting a tested piece.
As shown in fig. 1, the high-pressure system includes an oil tank 1, a switch 2, a first plunger pump 6, a first ac motor 7, a first oil filter 8, a first overflow valve 9, a first proportional overflow valve 10, a throttle valve 11, a first pressure/temperature sensor 12, a first quick-change coupler 13, and a pulsation attenuator 54; the liquid level switch 5 is used for measuring the liquid level of the mailbox 1.
The first alternating current motor 7 drives the first plunger pump 6 to rotate, hydraulic oil in the oil tank 1 is sucked into the plunger pump 6 through the switch 2, the outlet end of the first plunger pump 6 is connected with the first oil filter 8, the outlet of the first oil filter 8 is connected with the pulsation attenuator 54, the hydraulic oil flows into the first overflow valve 9, the first proportional overflow valve 10 and the first pressure/temperature sensor 12 under the action of the first oil filter 8 and the pulsation attenuator 54, the pressure of the pressurizing cavity is set through the first proportional overflow valve 10, and meanwhile the flow rate of the pressurizing cavity is set through the throttle valve 11. The high-pressure system is connected with other interfaces of the oil cylinder through a first quick-change connector 13.
The low-pressure system comprises an oil tank 1, a first butterfly valve 15, a gear pump 16, a variable frequency motor 17, a second oil filter 18, a second overflow valve 19, a proportional speed regulating valve 20, a second proportional overflow valve 21, an electromagnetic ball valve 22, a second pressure/temperature pressure sensor 23, a first flow meter 24 and a second quick-change connector 25;
the variable frequency motor 17 drives the gear pump 16 to rotate, hydraulic oil in the oil tank 1 is sucked into the gear pump 16 through the first butterfly valve 15, the outlet end of the gear pump 16 is connected with the second oil filter 18, the oil flows into the second overflow valve 19, the proportional speed control valve 20, the second proportional overflow valve 21, the second pressure/temperature sensor 23 and the first flowmeter 24 through the second oil filter 18, and the pressure flow of the oil storage cavity is regulated through the proportional speed control valve 20 and the second proportional overflow valve 21. The low-pressure system is connected with other interfaces of the oil cylinder through a second quick-change connector 25.
The oil temperature control and self-cleaning system comprises a second butterfly valve 26, a circulating pump 27, a second alternating current motor 28, a pressure gauge 29, a third oil filter 30, a fourth oil filter 31, a radiator 32, a proportional water valve 33, a water filter 43 and a first manual ball valve 44;
the second alternating current motor 28 drives the circulating pump 27 to suck oil in the oil tank 1, the oil passes through the second butterfly valve 26 and is connected in series with the third oil filter 30, the fourth oil filter 31 and the radiator 32 to realize the control of the oil temperature in the system and the self-cleaning of the oil, and the cooling water circulation of the radiator 32 is carried out by the proportional water valve 33, the water filter 43 and the first manual ball valve 44; the pressure of the oil at the outlet of the circulation pump 27 is detected by a pressure gauge 29.
The measurement and control system comprises a liquid level meter 3, a thermometer 4, a first pressure sensor 36, a second flowmeter 39, a third flowmeter 40, a first electric ball valve 37, a second electric ball valve 38, a data acquisition card, a switching value board card and an industrial control computer;
the liquid level meter 3 and the thermometer 4 are arranged at the inlet of the oil tank of the high-pressure oil circuit and are used for measuring the liquid level and the temperature of the oil tank 1;
the first pressure/temperature sensor 12 is arranged on a throttle valve 11 of the high-pressure oil path and used for measuring the outlet pressure and temperature of the throttle valve 11;
a second pressure/temperature sensor 23 and a first flow meter 24 are installed at the outlet of the low-pressure system and used for measuring low-pressure oil pressure, oil temperature and flow;
the pressure gauge 29 is arranged at the outlet of the circulating pump 27 of the oil temperature control and self-cleaning system and is used for measuring pressure;
the first proportional overflow valve 10 is arranged in the high-pressure system, is connected with the overflow valve 9 in parallel and is used for controlling the outlet pressure of the high-pressure main oil way;
the proportional speed regulating valve 20 and the second proportional overflow valve 21 are arranged on the low-pressure oil way and are connected with the overflow valve 19 in parallel for controlling the outlet flow and the pressure of the low-pressure oil way;
the electromagnetic ball valve 22, the first electric ball valve 37 and the second electric ball valve 38 are used for controlling the on-off of an oil path; one end of the first electric ball valve 37 is connected with the oil tank 1 through a second flowmeter 39, the other end of the first electric ball valve is connected with the third quick-change connector 34, the third pressure sensor 36 and the second manual ball valve 41, and the second manual ball valve 41 is connected with the measuring cup 42; one end of the second electric ball valve 38 is connected with the oil tank 1 through a third flow meter 40, and the other end is connected with the fourth quick-change connector 35 and the fourth pressure sensor; the data acquisition card and the switching value board card acquire pressure, flow and temperature signals of each path and upload the signals to the industrial control computer for analysis and display.
The present invention will be described in detail with reference to examples.
Examples
The oil tank hydraulic performance test bed consists of a hydraulic system, a measurement and control system and a bed body 3.
The hydraulic system can be suitable for a low-pressure system, a high-pressure system, a momentum cylinder system and a pressure-resistant system, and can independently perform test work. The hydraulic system of the oil tank performance test bed is an open system, and the hydraulic system can realize internal leakage test, pressure resistance test, static friction test, no-load full-load working test, volume test, endurance life test, relief valve working test and low-pressure relief valve performance test. The hydraulic system has a self-cleaning function. The oil inlet and the oil outlet of the oil tank adopt universal adapters, and the oil inlet and the oil return port of the test bed can be directly connected, so that the self-cleaning of the longest pipeline can be completed. And a plurality of exhaust valves are arranged in the hydraulic system, so that air in a system pipeline can be conveniently exhausted.
The working principle of the hydraulic system is as follows:
the first plunger pump 6 simulates a high-pressure oil source of an airplane and provides high pressure for a pressurizing cavity of a tested pressurizing oil tank. The first alternating current motor 7 drives the first plunger pump 6 to rotate, hydraulic oil in the oil tank 1 is sucked into the first plunger pump 6, the outlet end of the first plunger pump 6 is connected with a first proportional overflow valve 10 and a first pressure sensor 12, and the pressure of the pressurization cavity can be adjusted to a target value by controlling the first proportional overflow valve 10. Meanwhile, the setting throttle valve 11 can realize the setting of the flow speed of the pressurizing cavity.
The low-pressure gear pump 16 supplies the low pressure of the oil storage cavity of the tested booster oil tank and supplies hydraulic oil to the oil storage cavity. The variable frequency motor 17 drives the gear pump 16 to rotate, hydraulic oil in the oil tank 1 is sucked into the gear pump 16, a second proportional overflow valve 21, a proportional speed control valve 20, a second pressure sensor 23 and a first flow meter 24 are arranged at the outlet end of the gear pump 16, and the pressure flow of the oil storage cavity can be regulated by controlling the proportional speed control valve 20 and the second proportional overflow valve 21.
The circulating pump 27 is connected in series with the low-pressure oil filters 30 and 31 and the cooler 32, so that the oil temperature in the system can be controlled and the oil can be automatically cleaned.
The second plunger pump 46 provides the high pressure in the high pressure chamber of the pressurized tank being tested and delivers hydraulic oil to the high pressure chamber. The third alternating current motor 47 drives the second plunger pump 46 to rotate, oil in the oil tank 53 is sucked into the second plunger pump 46, the outlet end of the second plunger pump 46 is connected with a third proportional overflow valve 50 and the pressure sensor 12, and the pressure of the pressurization cavity can be adjusted to a target value by adjusting the third proportional overflow valve 50. One end of the third manual ball valve 45 is connected with the oil tank 53, and the other end is connected with the second plunger pump 46; the outlet end of the second plunger pump 46 is connected with a high-pressure filter 48, a pulsation attenuator 54, a manual throttle valve 51 and a quick-change connector, the safety valve is connected with a third proportional overflow valve in parallel, and an air filter 52 is further arranged on an oil tank 53.
The pressure increasing cavity of the measured pressure increasing oil tank 14 receives high pressure from the plunger pump 6, the pressure increasing cavity interacts with the low pressure supplied by the low pressure gear pump 16 to the oil storage cavity to reach balance, the piston of the pressure increasing oil tank keeps static, and the response pressure is kept for a specified time under the balance state, namely the pressure and pressure resistance test of the oil storage cavity is realized. If the pressure in the low pressure chamber is reduced by the second proportional relief valve 21, the balance is broken, and the booster tank piston moves toward the low pressure chamber, and vice versa. The pressure of the low-pressure cavity is changed in an alternating mode, the piston moves back and forth, and the alternating time and times are judged and controlled by controlling the limit switch, the flow meter reading and the PLC program, so that the flexibility, running-in and functional inspection tests of the measured pressurizing oil tank are realized.
The reading of the flowmeter and the reading of the pressure sensor are the flow and the pressure passing through the measured workpiece, the measurement result is fed back to the measurement and control system, and then the measurement and control system carries out data processing and storage on the measurement result. An oil level detecting instrument and an alarm device are arranged on an oil tank of the device, so that the oil in the oil tank cannot overflow or cannot meet the use requirement.
The measurement and control system is mainly used for realizing parameter adjustment, data acquisition and processing and power distribution protection of the hydraulic system, and an operation control panel is arranged on the oil tank performance test bed and used for realizing adjustment of working pressure and flow parameters and detection control of the hydraulic system. The acquisition element of the measurement and control system is arranged at the near end of a tested product to ensure the authenticity of the test, the acquisition frequency and the working mode can be adjusted according to the test requirement, and the whole process of image, text and video recording can be carried out for later-stage inspection of the test.
The measurement and control system mainly comprises a power distribution unit, a control unit, a data acquisition and processing unit and a motor dragging unit, wherein all devices of the test and test system are connected together through a signal conditioning box by a control and measurement module, and sensors for monitoring voltage, pressure, flow, oil quantity, temperature and the like, a signal conditioning device and a proportional pressure flow control valve are connected. In addition, the electric system has the functions of power distribution protection, manual operation switching, fault interlocking protection and emergency stop.
The stage body is used for installing by the test piece, sets up special fixture between the stage body and by the test piece, makes things convenient for the dismouting of product. The test piece is arranged in the test room, 2 high-definition cameras are arranged in the test room, and the observation window is arranged between the test room and the operation room, so that the oil tank can be monitored in real time and the subsequent test links can be regulated and controlled conveniently when an operator tester tests the oil tank. And ventilation devices are arranged between the hydraulic systems and the test room, so that the harm of the test to operators can be reduced. The bottom frame of the platform body is formed by welding I-shaped steel pieces and can be inserted and transported by a forklift.
Claims (3)
1. A performance test bed for a phosphate ester oil hydraulic oil tank is characterized by comprising a high-pressure system, a low-pressure system, an oil temperature control and self-cleaning system, a measurement and control system and a bed body;
the high-pressure system is used for adjusting the pressure and the flow of the pressurizing cavity; the low-pressure system is used for adjusting the pressure and the flow of the oil storage cavity; the oil temperature control and self-cleaning system is used for realizing the hydraulic oil temperature control and the self-cleaning of oil liquid of the hydraulic system; the measurement and control system is mainly used for realizing parameter adjustment, data acquisition and processing and power distribution protection of the hydraulic system; the table body is used for mounting a tested piece;
the high-pressure system comprises an oil tank (1), a switch (2), a first plunger pump (6), a first alternating current motor (7), a first oil filter (8), a first overflow valve (9), a first proportional overflow valve (10), a throttle valve (11), a first pressure/temperature sensor (12) and a pulsation attenuator (54);
the first alternating current motor (7) drives the first plunger pump (6) to rotate, hydraulic oil in the oil tank (1) is sucked into the first plunger pump (6) through the switch (2), the outlet end of the first plunger pump (6) is connected with the first oil filter (8), the outlet of the first oil filter (8) is connected with the pulsation attenuator (54), the oil flows into the first overflow valve (9), the first proportional overflow valve (10) and the first pressure/temperature sensor (12) under the action of the first oil filter (8) and the pulsation attenuator (54), the pressure of a booster cavity is regulated through the first proportional overflow valve (10), and meanwhile, the flow rate of the booster cavity is regulated through the throttle valve (11);
the low-pressure system comprises an oil tank (1), a first butterfly valve (15), a gear pump (16), a variable frequency motor (17), a second oil filter (18), a second overflow valve (19), a proportional speed regulating valve (20), a second proportional overflow valve (21), an electromagnetic ball valve (22), a second pressure/temperature sensor (23) and a first flowmeter (24);
the variable frequency motor (17) drives the gear pump (16) to rotate, hydraulic oil in the oil tank (1) is sucked into the gear pump (16) through the first butterfly valve (15), the outlet end of the gear pump (16) is connected with the second oil filter (18), the oil flows into the second overflow valve (19), the proportional speed regulating valve (20), the second proportional overflow valve (21), the second pressure/temperature sensor (23) and the first flowmeter (24) through the second oil filter (18), and the pressure flow of the oil storage cavity is regulated through the proportional speed regulating valve (20) and the second proportional overflow valve (21);
the oil temperature control and self-cleaning system comprises a second butterfly valve (26), a circulating pump (27), a second alternating current motor (28), a pressure gauge (29), a third oil filter (30), a fourth oil filter (31), a radiator (32), a proportional water valve (33), a water filter (43) and a first manual ball valve (44);
a second alternating current motor (28) drives a circulating pump (27) to suck oil liquid in an oil tank (1) and serially connects a third oil filter (30), a fourth oil filter (31) and a radiator (32) through a second butterfly valve (26) to realize the control of the oil temperature in the system and the self-cleaning of the oil liquid, and cooling water circulation of the radiator (32) is carried out by a proportional water valve (33), a water filter (43) and a first manual ball valve (44); the pressure of the oil at the outlet of the circulating pump (27) is detected by a pressure gauge (29);
the measurement and control system comprises a liquid level meter (3), a thermometer (4), a first pressure sensor (36), a second flowmeter (39), a third flowmeter (40), a first electric ball valve (37), a second electric ball valve (38), a data acquisition card, a switching value board card and an industrial control computer;
the liquid level meter (3) and the thermometer (4) are arranged at an oil tank inlet of the high-pressure oil way and are used for measuring the liquid level and the temperature of the oil tank (1); the first pressure/temperature sensor (12) is arranged on a throttle valve (11) of the high-pressure oil path and used for measuring the outlet pressure and temperature of the throttle valve (11); the second pressure/temperature sensor (23) and the first flow meter (24) are arranged at the outlet of the low-pressure system and used for measuring low-pressure oil pressure, oil temperature and flow; the pressure gauge (29) is arranged at the outlet of a circulating pump (27) of the oil temperature control and self-cleaning system and is used for measuring pressure; the first proportional overflow valve (10) is arranged in the high-pressure system, is connected with the first overflow valve (9) in parallel and is used for controlling the outlet pressure of the high-pressure main oil way; the proportional speed regulating valve (20) and the second proportional overflow valve (21) are arranged on the low-pressure oil way and are connected with the second overflow valve (19) in parallel to control the outlet flow and pressure of the low-pressure oil way; the electromagnetic ball valve (22), the first electric ball valve (37) and the second electric ball valve (38) are used for controlling the on-off of an oil path; one end of the first electric ball valve (37) is connected with the oil tank (1) through a second flowmeter (39), the other end of the first electric ball valve is connected with a third quick-change connector (34), a first pressure sensor (36) and a second manual ball valve (41), and the second manual ball valve (41) is connected with a measuring cup (42); one end of a second electric ball valve (38) is connected with the oil tank (1) through a third flow meter (40), and the other end of the second electric ball valve is connected with a fourth quick-change connector (35) and a fourth pressure sensor;
the data acquisition card and the switching value board card acquire pressure, flow and temperature signals of each path and upload the signals to the industrial control computer for analysis and display.
2. The phosphate ester oil hydraulic tank performance test bench of claim 1, characterized in that the high-pressure system is connected with the oil cylinder through a first quick-change connector (13).
3. The phosphate ester oil hydraulic tank performance test bench of claim 1, characterized in that the low-pressure system is connected to the oil cylinder by a second quick-change connector (25).
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| CN201911405540.7A CN111237291B (en) | 2019-12-30 | 2019-12-30 | Performance test stand for phosphate oil hydraulic oil tank |
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| CN201911405540.7A CN111237291B (en) | 2019-12-30 | 2019-12-30 | Performance test stand for phosphate oil hydraulic oil tank |
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| CN111237291B true CN111237291B (en) | 2021-07-13 |
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| CN113155241B (en) * | 2020-12-31 | 2024-06-21 | 成立航空技术(贵阳)有限公司 | Oil flow metering test bed based on high-precision piston cylinder and test method thereof |
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