Helicopter pressurization oil tank high-temperature working test device and test method

Abstract

The invention belongs to the field of aircraft design, and discloses a helicopter pressurization oil tank high-temperature working test device and test method. The device comprises a high-temperature hydraulic pump station, a tool table and a control module. The tool table is used for fixing two tested hydraulic pressurizing oil tanks; the high-temperature hydraulic pump station is used for providing a hydraulic oil source with pressure, temperature and flow required by the test, and circulating hydraulic oil in the tested hydraulic pressurizing oil tank to simulate the working state on the machine; the control module is used for controlling the high-temperature hydraulic pump station; the high-temperature hydraulic pump station is connected with the tool table through a control / signal cable. The high-temperature hydraulic pump station is also connected with the power cable; and the high-temperature hydraulic pump station is also connected with a tested hydraulic pressurizing oil tank on the tool table through four hydraulic rubber pipes.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of aircraft design, and discloses a helicopter pressurized tank high-temperature working test device and a test method. BACKGROUND

[0002] The hydraulic pressurized tank high-temperature working test is an important test item of the hydraulic pressurized tank performance test, and is a necessary means for verifying whether the function and performance of the hydraulic pressurized tank meet the requirements of the product technical specification. The hydraulic pressurized tank high-temperature working test in the test item is an important test for checking the adaptability of the hydraulic pressurized tank under high-temperature conditions.

[0003] The hydraulic pressurized tank adopts the hydraulic pressurization principle and is divided into two cavities. One cavity is an oil storage cavity for storing oil, and the other cavity is a pressurization cavity. The two cavities are not connected to each other. The oil storage cavity is supplied with pressure, and the piston rod of the pressurization cavity extends outward when the oil is returned; the pressurization cavity is supplied with pressure, and the piston rod of the oil storage cavity retracts inward when the oil is returned. When the pressure in the pressurization cavity is 10 MPa and the pressure in the oil storage cavity is 0.25 MPa, the piston maintains dynamic balance.

[0004] The high-temperature working test environment temperature is according to the "hot" climate type in Table 1 of GJB150.3A-2009 "Military Equipment Laboratory Environmental Test Methods High Temperature Test" (the conditions specified in the induction condition column), and is shown in Table 1.

[0005] Table 1 High-temperature daily cycle

[0006] Temperature change rate: generally not more than 3℃ / min.

[0007] High-temperature working test duration: 3 cycles (each cycle is 24h).

[0008] Expose the tank to the temperature conditions in Table 1 (the first cycle starts from 1500 corresponding to 71℃), 24 hours for one cycle, a total of 3 cycles for a total of 72 hours.

[0009] Since the hydraulic pressurized tank high-temperature working test needs to simulate the high-temperature working state of the on-machine hydraulic pressurized tank, the working process ensures that the oil tank working liquid temperature is 110℃±5℃, and fully considers that the working efficiency can simultaneously perform 2 tank tests, however, there is no such device in the prior art, and a helicopter hydraulic pressurized tank high-temperature working test device and a test method need to be invented. SUMMARY

[0010] The purpose of the application is to provide a helicopter hydraulic pressurized tank high-temperature working test device and a test method.

[0011] In order to solve the above technical scheme, the application provides a kind of helicopter hydraulic pressure boost tank high temperature work test device, comprising: high temperature hydraulic pump station, tooling table and control module; Tooling table is used to fix two test hydraulic pressure boost tanks; High temperature hydraulic pump station is used to provide the hydraulic oil source required by test pressure, temperature and flow, and circulate the hydraulic oil in the test hydraulic pressure boost tank, simulate the working condition on the machine; Control module is used to control high temperature hydraulic pump station; High temperature hydraulic pump station is connected with tooling table through control / signal cable; High temperature hydraulic pump station is also connected with power cable; High temperature hydraulic pump station is also connected with the test hydraulic pressure boost tank on tooling table through four hydraulic rubber pipes.

[0012] Further, tooling table comprises: Mounting base plate is installed in environmental box as platform support; Four clamp sliding guide rails are fixed on mounting base plate in parallel; A group of test hydraulic pressure boost tank fixing frames are installed on adjacent two clamp sliding guide rails, and a test hydraulic pressure boost tank is fixed by a group of test hydraulic pressure boost tank fixing frames; Sliding guide rail with locking device is used to fix test hydraulic pressure boost tank fixing frame; Microswitch sliding guide rail is provided on the edge of the upper surface of mounting base plate in parallel to clamp sliding guide rail; Two microswitches are installed on microswitch sliding guide rail respectively, and two sliding guide rails with locking device are used to lock two microswitches respectively; The oil storage cavities of two test hydraulic pressure boost tanks are communicated, and the oil storage cavities and boost cavities of two test hydraulic pressure boost tanks are connected with high temperature hydraulic pump station through four hydraulic rubber pipes.

[0013] Further, high temperature hydraulic pump station comprises: Rack is used as support of pump station; Quick connector faceplate is provided with four hydraulic plugs, which are connected with four hydraulic rubber pipes respectively; One oil storage cavity oil outlet hydraulic plug is divided into two passages by electromagnetic valve group, and connected with two high temperature motor pump group inlets respectively, and two high temperature motor pump group outlets are converged after passing through one-way valve respectively, first pressure pressure transmitter is arranged at the convergence position, and the convergence position is connected to another oil storage cavity oil return hydraulic plug after passing through pressure oil filter, radiator and heating assembly in sequence; 10MPa pressure device is connected with two boost cavity hydraulic plugs respectively, and is used to boost or release pressure for boost cavity of test hydraulic pressure boost tank.

[0014] Further, the electromagnetic valve group comprises: a first one-way valve, a second one-way valve, a first electromagnetic valve and a second electromagnetic valve; The first one-way valve and the second one-way valve are connected in series, and a sealing test interface S is arranged between the first one-way valve and the second one-way valve; The first one-way valve inlet is connected with the oil outlet hydraulic plug of the oil storage cavity, and the second one-way valve outlet is connected with the first electromagnetic valve outlet and then connected with the high-temperature motor pump group; The first one-way valve inlet is connected with the first electromagnetic valve inlet, and the second electromagnetic valve is connected in parallel with the first one-way valve.

[0015] Further, an oil injection port is connected between the electromagnetic valve group and the oil outlet hydraulic plug of the oil storage cavity, and the oil injection port is provided with a temperature transmitter; A pressure gauge is further connected between the electromagnetic valve group and the oil outlet hydraulic plug of the oil storage cavity; The first electromagnetic valve outlet is connected with a second pressure transmitter.

[0016] Further, the 10MPa pressure device comprises: A pressure oil tank for providing test pressure oil; A motor pump group for extracting pressure oil from the pressure oil tank; The motor pump group outlet is connected with the pressure oil tank through an overflow valve; The motor pump group outlet is connected with the third one-way valve inlet, and the third one-way valve outlet is connected with two hydraulic plugs of the pressure chambers; The third one-way valve outlet is further connected with the third electromagnetic valve inlet, and the third electromagnetic valve outlet is connected with the pressure oil tank.

[0017] A helicopter hydraulic pressure boosting oil tank high-temperature working test method, the process is as follows: Step one: fixing and connecting two test hydraulic pressure boosting oil tanks; Step two: filling the working liquid into the oil storage cavities of the two test hydraulic pressure boosting oil tanks from the oil injection port; Step three: sealing test at the sealing test interface S, and entering the next step after no leakage; Step four: starting the high-temperature motor pump group for flow circulation; Step five: supplying oil to the pressure chambers of the test hydraulic pressure boosting oil tank through the 10MPa pressure device, so that the pistons of the test hydraulic pressure boosting oil tank maintain dynamic balance at normal oil level, thereby maintaining the pressure of the oil storage cavities of the test hydraulic pressure boosting oil tank at 0.25MPa; Step six: starting the heating assembly to heat the hydraulic oil in the oil storage cavities of the test hydraulic pressure boosting oil tank from 10℃ to 110℃±5℃ target temperature within 1 hour; Step seven: after reaching the target temperature, opening the environmental box, and performing three rounds of circulation test according to the specified temperature.

[0018] Further, during the test, when the pressure difference of the first pressure transmitter and the second pressure transmitter is less than 0.1 Mpa, it is judged that the high-temperature pump set is damaged, and another high-temperature pump set is switched to.

[0019] Further, the overflow valve pressure is set to 10 MPa. Further, the method further comprises: Step eight: the open auxiliary oil tank is connected to the sealing test interface S, and the expansion performance test of the test hydraulic pressure boosting oil tank under high-temperature conditions is carried out; Step nine: during the test, the open auxiliary oil tank is used as the oil storage device of the high-temperature motor pump set, and the microswitch installed on the tooling table is triggered as a reversing or stopping signal when the piston rod of the test hydraulic pressure boosting oil tank is extended and retracted; the high-temperature pump set and the motor pump set are started. Step ten: when the first electromagnetic valve and the second electromagnetic valve lose power, and the third electromagnetic valve obtains power, the test hydraulic pressure boosting oil tank oil storage cavity oil inlet booster cavity returns oil, and the oil tank piston rod is extended; after the piston rod triggers the microswitch, the reversing is controlled by the set program, and step eleven is entered. Step eleven: when the first electromagnetic valve and the second electromagnetic valve obtain power at the same time, and the third electromagnetic valve loses power, the test hydraulic pressure boosting oil tank oil storage cavity returns oil, and the oil inlet booster cavity obtains oil, and the oil tank piston rod is retracted; after the piston rod triggers the microswitch, the reversing is controlled by the set program, and returns to step ten. Step twelve: steps ten and eleven are repeated until the cycle number is reached.

[0020] In summary, the beneficial effects of the present application are as follows: With the increasing use of hydraulic pressure boosting oil tanks for helicopters, the oil tank test task is heavy, and the present application can ensure that the hydraulic pressure boosting oil tank high-temperature working test is true simulation of the high-temperature working state of the working fluid temperature of 110℃±5℃ of the hydraulic pressure boosting oil tank on the machine, which reproduces the approximate on-machine working state, provides a basis for product designers to optimize product design or improve the overall performance of the product, and at the same time, the high-temperature working test of two oil tanks can be carried out, the test efficiency is improved, the test period is shortened, and the test cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 : Test device composition; Figure 2 : High-temperature hydraulic pump station structure diagram; Figure 3 : Control valve group hydraulic principle diagram; Figure 4 : Tooling table structure diagram; Figure 5 : High-temperature working test hydraulic principle diagram; Marked in the figure: 1-high temperature hydraulic pump station, 2-fixture table, 3-hydraulic rubber pipe with quick connector, 4-control / signal cable with aviation plug, 5-power cable with industrial plug, 6-high temperature hydraulic pump station rack, 7-10MPa pressure device, 8-high temperature motor pump group, 9-high temperature control group, 10-pressure oil filter, 11-radiator, 12-heating assembly, 13-hydraulic oil line quick connector panel, 14-aircraft plug panel, 15-industrial plug panel, 16-measurement and control module, 17-fixture table installation bottom plate, 18-subject hydraulic supercharged oil tank fixing frame, 19-hoop sliding guide rail, 20-hoop guide rail locking device, 21-micro switch sliding guide rail, 22-micro switch guide rail locking device, 71-oil tank, 72-motor pump group, 91-check valve, 92-solenoid valve, 93-overflow valve, 94-pressure transmitter, 95-temperature transmitter. DETAILED DESCRIPTION

[0022] A high-temperature working test device for a helicopter hydraulic supercharged oil tank, as shown in Figure 1 , the test device comprises: a high-temperature hydraulic pump station 1, a fixture table 2, a hydraulic rubber pipe 3 with a quick connector, a control / signal cable 4 with an aviation plug, and a power cable 5 with an industrial plug; the high-temperature hydraulic pump station 1 is used to provide the required hydraulic oil source for the subject hydraulic supercharged oil tank; the fixture table 2 is used to provide an installation platform for the subject hydraulic supercharged oil tank; the high-temperature hydraulic pump station 1 is connected with the fixture table 2 through the hydraulic rubber pipe 3 with a quick connector and the control / signal cable 4 with an aviation plug; the hydraulic rubber pipe 3 is wrapped with a rubber heat preservation sleeve; the high-temperature hydraulic pump station 1 is connected with the high-low temperature tank outside pipeline joint through the hydraulic rubber pipe 3, and the connection form is a navigation mark 74° flared connection form (HB4-1-83); the high-low temperature tank inside pipeline joint is connected with the subject hydraulic supercharged oil tank through the hydraulic rubber pipe 3, and the connection form of the high-low temperature tank inside pipeline joint is a navigation mark 74° flared connection form (HB4-1-83), and the connection form of the subject hydraulic supercharged oil tank is a 24° non-flared connection form (HB5970-86); the hydraulic rubber pipe 3 realizes the transportation and discharge of the oil source between the high-temperature hydraulic pump station and the subject hydraulic supercharged oil tank; the control / signal cable 4 with an aviation plug realizes the transmission of the piston rod extension, retraction and reversing signal during the test of the subject hydraulic supercharged oil tank; the power cable 5 is connected with the high-temperature hydraulic pump station 1 through the industrial plug panel; and the power cable 5 is externally connected with a power supply to provide electric energy for the test device.

[0023] As shown in Figure 2, the high-temperature hydraulic pump station 1 comprises a rack 6, a 10 MPa pressure device 7, a high-temperature motor pump group 8, a high-temperature control valve group 9, a pressure oil filter 10, a radiator 11, a heating assembly 12, a hydraulic oil path quick-change connector panel 13, an aviation plug panel 14, an industrial plug panel 15 and a measurement and control module 16; the rack 6 is used for providing an installation platform for all accessories in the high-temperature hydraulic pump station, and rollers and a push handle are arranged to facilitate the movement of the high-temperature hydraulic pump station; the 10 MPa pressure device 7 is connected with the P3 port and the T port of the control valve group 9 through the hydraulic rubber tube 3, and is used for providing a 10 MPa pressure oil source for the pressure boosting cavity of the test hydraulic pressure boosting oil tank; the high-temperature motor pump group 8 comprises two sets of motor pump groups (the motor rotating speed is 0-4000 rpm, the pump displacement is 1.2 ml / r, and the pressure is 20 bar), one of which is used as a redundant backup; the high-temperature motor pump group 8.1 is connected with the P1 port, the A1 port and the A2 port of the control valve group 9 through the hydraulic rubber tube 3; the high-temperature motor pump group 8.2 is connected with the P2 port, the A1 port and the A2 port of the control valve group 9 through the hydraulic rubber tube 3, and is used for providing a 0.25 MPa pressure oil source for the oil storage cavity of the test hydraulic pressure boosting oil tank; as Figure 3 , the high-temperature control valve group 9 comprises a one-way valve 91, an electromagnetic valve 92, an overflow valve 93, a pressure transmitter 94 and a temperature transmitter 95, and is used for controlling the flow, pressure and flow direction of the hydraulic oil source; the oil inlet of the pressure oil filter 10 is connected with the E port of the control valve group 9 through the hydraulic rubber tube 3, the oil outlet of the pressure oil filter 10 is connected with the oil inlet of the radiator 11 through the hydraulic rubber tube 3, and the pressure oil filter 10 is used for controlling the oil pollution degree to meet the test requirements that the oil pollution degree is better than GJB420B 7; the oil outlet of the radiator 11 is connected with the oil inlet of the heating assembly 12 through the hydraulic rubber tube 3, and the radiator 11 is used for maintaining the oil temperature of the oil storage cavity of the test hydraulic pressure boosting oil tank at 110℃±5℃ to obtain dynamic stability during the high-temperature working test; the oil outlet of the heating assembly 12 is connected with the A1 port of the inner pipeline connector of the hydraulic oil path quick-change connector panel 13 through the hydraulic rubber tube 3, the heating assembly 12 comprises two 1 kW heaters, is used for heating the passing oil, and can select one or two heaters to heat the oil according to the program control; the inner pipeline connector of the hydraulic oil path quick-change connector panel 13 is connected with the B1 port, the B2 port and the C port of the control valve group 9 through the hydraulic rubber tube 3; the outer pipeline connector of the hydraulic oil path quick-change connector panel 13 is connected with the outer pipeline connector of the high-low temperature tank through the hydraulic rubber tube 3, and the connection form is the aviation standard 74° flared connection form (HB4-1-83), which is used for providing the oil source conveying and discharging path between the high-temperature hydraulic pump station and the test hydraulic pressure boosting oil tank; the aviation plug panel 14 is connected with the tooling rack microswitch signal line through the control / signal cable 4, and is used for transmitting the piston rod extension and retraction switching signal during the test of the test hydraulic pressure boosting oil tank; the industrial plug panel 15 is connected with the external AC380V power supply through the power cable 5, and is used for providing power for the high-temperature pump station; and the measurement and control module 16 takes the PLC control as the core and takes the 12-inch HMI high-definition touch screen as the operation interface, and is used for monitoring and controlling the test state in real time and recording the test data during the test.

[0024] As Figure 4 , the tooling table 2 includes a mounting base plate 17, a test hydraulic supercharged tank fixing frame 18, a clamp sliding guide rail 19, a clamp guide rail locking device 20, a micro switch sliding guide rail 21, a micro switch guide rail locking device 22, and two test hydraulic supercharged tanks can be installed simultaneously for testing; during testing, the tooling table 2 is installed on the guide rail plate of the high-low temperature test box (environmental box); the mounting base plate 17 is used to provide a mounting platform for tooling table accessories; the test hydraulic supercharged tank fixing frame 18 adopts a pull buckle type clamp, and oil-resistant rubber is adhered inside the clamp to reduce the surface wear of the tank and facilitate the quick fixing of the test hydraulic supercharged tank; two pull buckle type clamps are installed on the clamp sliding guide rail 19, and the clamp sliding guide rail 19 is fixedly installed on the mounting base plate 17; the sliding guide rail with the locking device 20 facilitates quick switching and fixing of large and small tanks; two micro switches are installed on the micro switch sliding guide rail 21, and the micro switch sliding guide rail 21 is fixedly installed on the mounting base plate 17; the sliding guide rail with the locking device 22 facilitates the fixing of the micro switch when switching between large and small tanks; the micro switch is used to provide a reversing signal for the piston rod extension and retraction of the test hydraulic supercharged tank during testing; the test hydraulic supercharged tank A1, A2, B1, B2 oil port is connected to the high-low temperature box inside pipeline connector through the hydraulic hose 3, and the high-low temperature box inside end connector connection form is the navigation mark 74° flared connection form (HB4-1-83), and the hydraulic supercharged tank end connector connection form is the 24° non-flared connection form (HB5970-86).

[0025] A helicopter hydraulic supercharged tank high temperature working test method, as Figure 4 , two test hydraulic supercharged tanks are fixed by the pull buckle type steel ring clamp with oil-resistant rubber pads inside the oil tank fixing frame 18, the steel ring clamp is installed on the sliding guide rail 19, and after locking with the sliding block 20, the tooling table 2 is installed on the guide rail plate inside the high temperature test box; the test hydraulic supercharged tank is connected to the Figure 2 high temperature hydraulic pump station by the hydraulic hose 3.

[0026] The high temperature hydraulic pump station hydraulic principle diagram is as Figure 5As shown, the test hydraulic booster tank is used as the oil storage device of the high-temperature motor pump set 8 during the high-temperature working test. The two test tank oil storage cavities are filled with working fluid (about 16L in total) at the oil inlet. After the hydraulic pipeline system is exhausted at the S port of the control valve set 9, the sealing test is performed. After the hydraulic pipeline system is found to be leak-free, the high-temperature motor pump set 8.1 is started to make the hydraulic system circulate at a flow rate. The high-temperature motor pump set 8.1 and the motor pump set 8.2 are backup to each other. The pressure at the inlet and outlet of the high-temperature motor pump set 8 is detected by the pressure transmitter 94. When the pressure difference between the pressure transmitters 94.1 and 94.2 is less than 0.1 MPa, it is determined that the high-temperature pump set is damaged, and the standby high-temperature pump is started. The pump set 72 in the 10 MPa pressure device 7 is started to supply oil to the booster cavity of the test hydraulic booster tank. The control overflow valve 93 (with a pressure range of 0.4-35 MPa) is set to 10 MPa. The electromagnetic valve 92.3 is powered on, and the main pump of the pump set 72 continuously provides a pressure of 10 MPa to the system, so that the piston of the test hydraulic booster tank maintains dynamic balance at a normal oil level, and the pressure in the test hydraulic booster tank is 0.25 MPa. The speed of the motor of the high-temperature motor pump set 8.1 can be adjusted to assist in maintaining the dynamic balance of the hydraulic tank. The heating assembly 12 is started, and two heaters are used to heat the hydraulic oil in the system. The temperature of the working fluid in the test hydraulic booster tank is raised from 10°C to the target temperature of 110°C±5°C within 1 hour. The temperature of the working fluid in the test hydraulic booster tank is obtained by the temperature transmitter 95. After the target temperature of the working fluid is reached, the high-temperature test tank is started to perform the test for three cycles at the temperatures specified in Table 1. During the test, when the temperature of the working fluid is higher than the target temperature, one of the heaters in the heating assembly 12 is turned off or the heat sink 11 is opened according to the program control. When the temperature of the working fluid is lower than the target temperature, the heat sink 11 is closed and the closed heater is opened, so that the target temperature of the working fluid in the hydraulic tank is 110°C±5°C. The dynamic stability can be obtained at different environmental temperatures according to Table 1, and the high-temperature working state of the hydraulic booster tank on the simulation machine is realized. In addition, in the case of an external open auxiliary tank at S, the extension and retraction performance test (high-temperature durability test) of the test hydraulic booster tank under high-temperature conditions can be realized. During the test, the auxiliary tank is used as the oil storage device of the high-temperature motor pump set 8. The extension and retraction of the piston rod of the test hydraulic booster tank triggers the microswitch installed on the tooling table 2 as a reversing or stopping signal. The high-temperature pump set 8.1 and the motor pump set 72 are started. When the electromagnetic valves 92.1 or 92.2 lose power and the electromagnetic valve 92.3 is powered on, the test hydraulic booster tank oil storage cavity is filled with oil, and the piston rod of the tank is extended. When the piston rod triggers the microswitch, the program control is set to reverse. The electromagnetic valves 92.1 and 92.2 are powered on, and the electromagnetic valve 92.3 loses power. The test hydraulic booster tank oil storage cavity is filled with oil, and the piston rod of the tank is retracted. When the piston rod triggers the microswitch, the program control is set to reverse. The electromagnetic valves 92.1 or 92.2 lose power, and the electromagnetic valve 92.3 is powered on. The test hydraulic booster tank oil storage cavity is filled with oil, and the piston rod of the tank is extended. The above-mentioned processes are repeated to complete the specified number of tests.

Claims

1. A high-temperature operating test device for a helicopter hydraulic booster tank, characterized in that: The device includes: a high-temperature hydraulic pump station, a tooling table, and a control module; The tooling table is used to fix two hydraulic booster tanks for testing. The high-temperature hydraulic pump station is used to provide the hydraulic oil source with the required pressure, temperature and flow rate for the test, and at the same time circulates the hydraulic oil in the hydraulic booster tank under test to simulate the working state on the machine. The control module is used to control the high-temperature hydraulic pump station; The high-temperature hydraulic pump station is connected to the tooling table via a control / signal cable; The high-temperature hydraulic pump station is also connected to a power cable; The high-temperature hydraulic pump station is also connected to the test hydraulic booster tank on the tooling table via four hydraulic hoses.

2. The apparatus according to claim 1, characterized in that: The tooling table includes: The mounting base plate serves as platform support and is installed inside the environmental chamber. Four clamp sliding guide rails are fixed parallel to each other on the mounting base plate; A set of test hydraulic booster tank fixing brackets are installed on two adjacent clamp sliding guide rails, and a test hydraulic booster tank is fixed together by a set of test hydraulic booster tank fixing brackets; The sliding guide rail with locking device is used to fix the test hydraulic booster tank mounting bracket; The mounting base plate has a micro switch sliding rail with its upper surface edge parallel to the clamp sliding rail; Two microswitches are respectively mounted on microswitch sliding rails, and the two sliding rails are equipped with locking devices to lock the two microswitches. The oil storage chambers of the two tested hydraulic booster tanks are connected; the oil storage chambers and booster chambers of the two tested hydraulic booster tanks are respectively connected to a high-temperature hydraulic pump station through four hydraulic hoses.

3. The apparatus according to claim 2, characterized in that: High-temperature hydraulic pump stations include: The platform serves as support for the pumping station; The quick-connect coupling panel has four hydraulic plugs, which connect to four hydraulic hoses respectively; One of the oil storage chamber outlet hydraulic plugs is divided into two passages by a solenoid valve group, which are respectively connected to the inlet of two high-temperature motor pump groups. The outlets of the two high-temperature motor pump groups are merged after passing through a check valve. A first pressure transmitter is installed at the merging point. After merging, the flow passes through a pressure oil filter, a radiator and a heating component in sequence before being connected to the other oil storage chamber return hydraulic plug. The 10MPa pressure device is connected to the hydraulic plugs of the two booster chambers respectively. The 10MPa pressure device is used to boost or depressurize the booster chambers of the hydraulic booster tank under test.

4. The apparatus according to claim 3, characterized in that: The solenoid valve assembly includes: First check valve, second check valve, first solenoid valve and second solenoid valve; The first check valve and the second check valve are connected in series, and a sealing test interface S is provided between the first check valve and the second check valve; The inlet of the first check valve is connected to the hydraulic plug of the oil storage chamber, and the outlet of the second check valve is connected to the outlet of the first solenoid valve and then connected to the high-temperature motor pump unit. The inlet of the first check valve is connected to the inlet of the first solenoid valve, and the second solenoid valve is connected in parallel with the first check valve.

5. The apparatus according to claim 4, characterized in that: An oil inlet is connected between the solenoid valve assembly and the hydraulic plug at the oil outlet of the oil reservoir, and the oil inlet is equipped with a temperature transmitter. A pressure gauge is also connected between the solenoid valve assembly and the hydraulic plug at the oil outlet of the oil reservoir. The outlet of the first solenoid valve is connected to a second pressure transmitter.

6. The apparatus according to claim 3, characterized in that: The 10MPa pressure device includes: Pressure tank, used to supply test pressure oil; The electric pump unit draws pressurized oil from the pressure oil tank; The outlet of the motor pump unit is connected to the pressure oil tank via an overflow valve; The outlet of the motor pump unit is connected to the inlet of the third check valve, and the outlet of the third check valve is connected to the hydraulic plugs of the two booster chambers. The outlet of the third check valve is also connected to the inlet of the third solenoid valve, and the outlet of the third solenoid valve is connected to the pressure oil tank.

7. A method for testing the high-temperature operation of a helicopter hydraulic booster tank, implemented based on the apparatus according to any one of claims 1-6, characterized in that: Step 1: Fixing and connecting the two hydraulic booster tanks under test; Step 2: Fill the reservoirs of the two tested hydraulic booster tanks with working fluid through the oil inlet. Step 3: Perform a sealing test at the sealing test interface S. If there is no leakage, proceed to the next step. Step 4: Start the high-temperature motor pump unit to circulate the flow; Step 5: Supply oil to the pressure chamber of the hydraulic booster tank under test through a 10MPa pressure device, so that the piston of the hydraulic booster tank under test maintains dynamic balance at the normal oil level, thereby maintaining the oil storage chamber pressure of the hydraulic booster tank under test at 0.25MPa. Step Six: Activate the heating component to heat the hydraulic oil in the reservoir of the hydraulic booster tank under test from 10℃ to the target temperature of 110℃±5℃ within 1 hour; Step 7: After reaching the target temperature, turn on the environmental chamber and conduct three rounds of cyclic testing at the specified temperature.

8. The method according to claim 7, characterized in that: During the test, when the pressure difference between the first pressure transmitter and the second pressure transmitter is less than 0.1 MPa, it is determined that the high-temperature pump set is damaged and it is switched to another high-temperature pump set.

9. The method according to claim 7, characterized in that: Set the relief valve pressure to 10 MPa.

10. The method according to claim 7, characterized in that: The method further includes: Step 8: Connect an open auxiliary oil tank to the sealing test interface S and conduct a telescoping performance test on the tested hydraulic booster oil tank under high temperature conditions; Step 9: During the test, the open auxiliary oil tank serves as the oil storage device for the high-temperature motor pump unit. When the piston rod of the hydraulic booster tank under test extends and retracts, it triggers the micro switch installed on the tooling table as a reversing or stopping signal; the high-temperature pump unit and motor pump unit are started. Step 10: When the first or second solenoid valve is energized and the third solenoid valve is de-energized, the oil storage chamber of the hydraulic booster tank under test receives oil and the booster chamber receives oil, and the piston rod of the tank extends; when the piston rod triggers the micro switch, the reversal is controlled by the set program, and the process proceeds to Step 11. Step 11: The first and second solenoid valves are simultaneously de-energized, the third solenoid valve is energized, the oil storage chamber of the tested hydraulic booster tank returns oil to the booster chamber and oil enters the tank, and the piston rod of the tank retracts; when the piston rod triggers the micro switch, the reverse direction is controlled by the set program, and the process returns to step 10. Step 12: Repeat steps 10 and 11 until the required number of cycles is reached.

Images