Comprehensive test equipment for accessory oil seal of helicopter hydraulic system

Abstract

The invention relates to the technical field of oil seal testing, in particular to comprehensive testing equipment for an accessory oil seal of a helicopter hydraulic system, and solves the problems that when an existing oil seal table is used for testing the accessory oil seal of the helicopter, simulation testing cannot be conducted according to the using environment of the oil seal, the testing result is limited, and testing operation is tedious. Comprising a testing liquid supply mechanism and two oil seal testing mechanisms, the two oil seal testing mechanisms are installed on the inner side of the testing liquid supply mechanism, the two oil seal testing mechanisms are symmetrically installed relative to the middle of the testing liquid supply mechanism, and each oil seal testing mechanism is composed of a supporting driving unit and a dynamic and static testing unit. And the dynamic and static test unit is coaxial with the support driving unit and is located at the upper end of the support driving unit. By simulating the application environment of the accessory oil seal of the helicopter system, the dynamic and static pressurization test of different types of accessory oil seals in different hydraulic oil can be met, the test range is wider, the operation is simple, and the test accuracy is higher.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil seal testing, in particular to a comprehensive test equipment for oil seals of helicopter hydraulic system accessories. BACKGROUND

[0002] The helicopter hydraulic system is a working medium with hydraulic oil, which drives the flight control mechanism through the principle of hydraulic transmission, drives the key components such as elevators, rudders and ailerons through hydraulic power, and its core functions include adjusting the flight attitude, providing sufficient pressure for the hydraulic system to smoothly retract and deploy the landing gear during flight and landing, driving the brake pad through hydraulic pressure to achieve safe deceleration, and the hand pump can drive the public system in emergency to ensure that the landing gear retraction and other key actions can be completed when the main system fails. There are various internal oil seals in the accessories of the helicopter hydraulic system, which need to be comprehensively tested before being applied.

[0003] The existing oil seal platform cannot simulate the test according to the use environment of the oil seal when testing the oil seal of the helicopter accessory, the test result is limited, and the test operation is cumbersome; therefore, it does not meet the existing needs, and for this purpose, the present application provides a comprehensive test equipment for oil seals of helicopter hydraulic system accessories. SUMMARY

[0004] The present application aims to provide a comprehensive test equipment for oil seals of helicopter hydraulic system accessories to solve the problem that the existing oil seal platform cannot simulate the test according to the use environment of the oil seal when testing the oil seal of the helicopter accessory, the test result is limited, and the test operation is cumbersome.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a comprehensive test equipment for oil seals of helicopter hydraulic system accessories, comprising a test liquid supply mechanism and two oil seal test mechanisms, the inner side of the test liquid supply mechanism is provided with two oil seal test mechanisms, the two oil seal test mechanisms are symmetrically installed relative to the middle part of the test liquid supply mechanism, the oil seal test mechanism is composed of a support driving unit and a dynamic and static test unit, the dynamic and static test unit is coaxial with the support driving unit and located at the upper end of the support driving unit, the dynamic and static test unit comprises a lifting seat, both ends of the lifting seat are rotatably connected with locking knobs, the middle part of the lifting seat is fixedly provided with a transparent observation cylinder, four corner angles of the lower end surface of the lifting seat are fixedly provided with guide columns, the inner side of the bottom end of the lifting seat is provided with a sealing connection cover, the sealing connection cover is provided with a hydraulic oil booster shell below, a connecting ring is installed between the sealing connection cover and the hydraulic oil booster shell, the inner side of the bottom end of the sealing connection cover is provided with an oil seal pressing seat, the inner side of the upper end of the hydraulic oil booster shell is fixedly provided with an oil seal stepped ring, the inner side of the oil seal stepped ring is rotatably connected with a second transmission shaft, and the bottom end of the second transmission shaft is provided with a spline sleeve.

[0006] Preferably, the test liquid supply mechanism comprises a test installation box, the front end surface of the test installation box is rotatably connected with two box doors, the bottom end of the test installation box is slidably connected with a liquid collecting base, the rear end surface of the test installation box is fixedly installed with a breathable rear plate, the upper end of the test installation box is fixedly installed with an upper sealing plate, two partition plates are fixedly installed between the test installation box and the upper sealing plate, a first liquid storage tank and a second liquid storage tank are respectively fixedly installed between the two ends of the two partition plates, the first liquid storage tank is located directly above the second liquid storage tank, two booster pumps are installed between the first liquid storage tank and the second liquid storage tank, and a liquid delivery hose is fixedly installed at the bottom end of the booster pump.

[0007] Preferably, the support driving unit comprises a support base, four end corners of the upper end surface of the support base are fixedly installed with guide sleeves, two anti-deviation positioning tooth plates are fixedly installed outside the upper ends of the four guide sleeves, the surfaces of the two ends of the support base are each provided with a plurality of drainage holes, the inner side of the middle part of the support base is fixedly installed with a transmission motor, the output end of the transmission motor is fixedly installed with a first transmission shaft, the outer side of the upper end of the first transmission shaft is rotatably connected with a support partition plate, and the middle part of the upper end surface of the support partition plate is fixedly installed with a rotary support bearing.

[0008] Preferably, the bottom ends of the test installation box and the two support bases are fixedly connected, the inner side of the test installation box is through-connection connected with the liquid collecting base through the plurality of drainage holes, the four end corners of the support partition plate are all fixedly sleeved outside the four guide sleeves, the two anti-deviation positioning tooth plates are located directly above the support partition plate, the two anti-deviation positioning tooth plates are symmetrically installed relative to the connecting ring, and the connecting ring and the adjacent two anti-deviation positioning tooth plates are connected through intermeshing.

[0009] Preferably, the spline sleeve is rotatably connected with the support partition plate through the rotary support bearing, the upper end of the first transmission shaft penetrates through the support partition plate and the rotary support bearing and is plug-in installed with the spline sleeve, the bottom end of the second transmission shaft penetrates through the hydraulic oil booster shell and is fixedly connected with the spline sleeve, and the spline sleeve is rotatably connected with the bottom end of the hydraulic oil booster shell.

[0010] Preferably, the bottom end of the hydraulic oil booster shell is provided with a booster cavity between the oil seal stepped ring, the upper end surface of the oil seal stepped ring is provided with a plurality of oil seal installation grooves, the diameter sizes of the plurality of oil seal installation grooves gradually decrease from top to bottom, an accessory oil seal is arranged between the oil seal stepped ring and the oil seal pressing seat, and the upper end of the second transmission shaft penetrates through the booster cavity and the oil seal stepped ring and is rotatably connected with the oil seal pressing seat through the roller bearing.

[0011] Preferably, the booster pump is fixedly connected with the partition stand, the upper ends of the two booster pumps are respectively in through connection with the first liquid storage tank and the second liquid storage tank, and the first liquid storage tank and the second liquid storage tank are respectively filled with MIL-PRF-83282D standard hydraulic oil and YH-15 aviation hydraulic oil.

[0012] Preferably, one side of the partition stand is provided with a waist-shaped hole, the infusion hose penetrates through the waist-shaped hole and is fixedly connected with the hydraulic oil booster shell, and the booster cavity is in through connection with the booster pump through the infusion hose.

[0013] Preferably, the upper end of the oil seal pressing seat is in threaded connection with the connecting ring, the connecting ring is fixedly connected with the hydraulic oil booster shell through screws, a sealing gasket is arranged between the connecting ring and the hydraulic oil booster shell, the two ends of the sealing connecting cover are in threaded connection with the connecting ring and the lifting seat, and the lifting seat is fixedly connected with the connecting ring through the sealing connecting cover.

[0014] Preferably, the sealing connecting cover and the oil seal pressing seat form an observation cavity, the bottom end of the transparent observation cylinder penetrates through the lifting seat and the sealing connecting cover and is inserted into the inner side of the observation cavity, and the two ends of the upper sealing plate are locked and installed through the locking knobs.

[0015] Compared with the prior art, the present application has the following advantages: 1、The oil seal installation groove is arranged on the upper end face of the oil seal stepped ring, and the diameters of the oil seal installation grooves gradually decrease from top to bottom, so that different types of accessory oil seals can be positioned and installed through the oil seal installation grooves, the accessory oil seals are pressed by the oil seal pressing seat, the accessory oil seals are kept sealed and isolated between the oil seal stepped ring and the oil seal pressing seat, the two booster pumps draw the two types of hydraulic oil in the first liquid storage tank and the second liquid storage tank into the inner side of the booster cavity through the infusion hose, the pressure in the booster cavity is increased to realize static pressure boosting test on the two accessory oil seals of the same type in the two dynamic and static test units, the transmission motor drives the second transmission shaft to rotate in the inner side of the accessory oil seal through the first transmission shaft and the spline sleeve in turn, so that the dynamic pressure boosting test on the accessory oil seal is realized under the condition that the hydraulic oil pressure is kept unchanged, and the results of the dynamic and static pressure boosting test on the accessory oil seal in the two types of hydraulic oil can be obtained by observing whether the hydraulic oil seeps out from the inner wall of the bottom end of the oil seal pressing seat through the transparent observation cylinder. 2、The present application can limit the connection ring in the axial direction through the anti-deflection positioning tooth plate, avoid the deflection of the connection ring with the second transmission shaft, support the spline sleeve through the rotary support bearing to rotate and support the spline sleeve, keep the transmission stability of the spline sleeve, lift the lifting seat to drive the sealing connection cover, the connection ring, the hydraulic oil booster shell and the spline sleeve upward and separate the spline sleeve from the first transmission shaft, guide the column through the guide sleeve to keep the lifting seat stable, rotate the sealing connection cover to accommodate the sealing connection cover to the inside of the lifting seat and separate from the connection ring, which is convenient for replacing and installing the accessory oil seal on the oil seal stepped ring. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the whole application; Figure 2 It is a schematic diagram of the structure of the whole application; Figure 3 It is a schematic diagram of the installation structure of the oil seal test mechanism of the application; Figure 4 It is an exploded view of the test liquid supply mechanism of the application; Figure 5 It is a schematic diagram of the structure of the support driving unit of the application; Figure 6 It is a schematic diagram of the installation structure of the dynamic and static test unit of the application; Figure 7 It is a schematic diagram of the cross-sectional structure of the oil seal test mechanism of the application.

[0017] In the figure: 1, test liquid supply mechanism; 101, test installation box; 102, box door; 103, liquid collecting base; 104, upper sealing plate; 105, partition stand; 106, first liquid storage tank; 107, second liquid storage tank; 108, booster pump; 109, liquid delivery hose; 110, air permeable back plate; 2, oil seal test mechanism; 3, support driving unit; 301, support base; 302, drainage hole; 303, guide sleeve; 304, transmission motor; 305, first transmission shaft; 306, rotary support bearing; 307, support partition plate; 308, anti-deflection positioning tooth plate; 4, dynamic and static test unit; 401, lifting seat; 402, locking knob; 403, transparent observation cylinder; 404, sealing connection cover; 405, connection ring; 406, hydraulic oil booster shell; 407, guide column; 408, spline sleeve; 409, second transmission shaft; 410, oil seal stepped ring; 411, oil seal pressing seat. DETAILED DESCRIPTION

[0018] Clearly, the embodiments described are only a part of the embodiments of the present application, rather than all the embodiments.

[0019] The booster pump 108 (model 80CYZ-22) and the transmission motor 304 (model GV50-3.7KW-60-S) mentioned in the present application can be purchased from the market or customized privately.

[0020] Please refer to Figures 1 to 4 The present application provides an embodiment: a comprehensive test device for helicopter hydraulic system accessory oil seals, comprising a test liquid supply mechanism 1 and two oil seal test mechanisms 2, the test liquid supply mechanism 1 comprising a test installation box 101, the front end face of the test installation box 101 being rotatably connected with two box doors 102, the bottom end of the test installation box 101 being slidably connected with a liquid collecting base 103, the rear end face of the test installation box 101 being fixedly installed with a breathable rear plate 110, the upper end of the test installation box 101 being fixedly installed with an upper sealing plate 104, two partition plates 105 being fixedly installed between the test installation box 101 and the upper sealing plate 104, a first liquid storage tank 106 and a second liquid storage tank 107 being fixedly installed between the two ends of the two partition plates 105, the first liquid storage tank 106 being located directly above the second liquid storage tank 107, two booster pumps 108 being installed between the first liquid storage tank 106 and the second liquid storage tank 107, the bottom end of the booster pump 108 being fixedly installed with a liquid delivery hose 109, the booster pump 108 being fixedly connected with the partition plate 105, the upper end of each of the two booster pumps 108 being throughly connected with the first liquid storage tank 106 and the second liquid storage tank 107, the interiors of the first liquid storage tank 106 and the second liquid storage tank 107 being respectively filled with MIL-PRF-83282D standard hydraulic oil and YH-15 aviation hydraulic oil, the booster cavity being throughly connected with the booster pump 108 through the liquid delivery hose 109, so that the two booster pumps 108 respectively extract the two kinds of hydraulic oil in the first liquid storage tank 106 and the second liquid storage tank 107 under the support of the partition plate 105.

[0021] Please refer to Figure 1 and Figure 2 The inside of the test liquid supply mechanism 1 is installed with two oil seal test mechanisms 2, the two oil seal test mechanisms 2 being symmetrically installed relative to the middle part of the test liquid supply mechanism 1, the oil seal test mechanism 2 being composed of a support driving unit 3 and a dynamic and static test unit 4, the dynamic and static test unit 4 being coaxial with the support driving unit 3 and being located at the upper end of the support driving unit 3, the two oil seal test mechanisms 2 facilitating the test operation of different types of accessory oil seals under the boosting action of the two kinds of hydraulic oil.

[0022] Please refer to Figures 2 to 7The support driving unit 3 comprises a support base 301, the surfaces of both ends of the support base 301 are provided with a plurality of water draining holes 302, the test installation box 101 is fixedly connected with the bottom ends of the two support bases 301, the inner side of the test installation box 101 is through-connection connected with the liquid collecting base 103 through the plurality of water draining holes 302, the four end corners of the upper end surface of the support base 301 are fixedly installed with guide sleeves 303, the outer sides of the upper ends of the four guide sleeves 303 are fixedly installed with two anti-deviation positioning tooth plates 308, the inner side of the middle part of the support base 301 is fixedly installed with a transmission motor 304, the output end of the transmission motor 304 is fixedly installed with a first transmission shaft 305, the outer side of the upper end of the first transmission shaft 305 is rotationally connected with a support partition plate 307, the four end corners of the support partition plate 307 are all sleeved and fixed on the outer sides of the four guide sleeves 303, the two anti-deviation positioning tooth plates 308 are located directly above the support partition plate 307, the middle part of the upper end surface of the support partition plate 307 is fixedly installed with a slewing bearing 306, so that the transmission motor 304 drives the second transmission shaft 409 to rotate on the inner side of the accessory oil seal in sequence through the first transmission shaft 305 and the spline sleeve 408, and then the dynamic supercharging test of the accessory oil seal is realized under the condition that the hydraulic oil pressure is kept unchanged.

[0023] Please refer to Figures 5 to 7 The dynamic and static test unit 4 comprises a lifting seat 401, the two ends of the lifting seat 401 are rotationally connected with locking knobs 402, the two ends of the upper sealing plate 104 are locked and installed with the two ends of the two lifting seats 401 through the locking knobs 402, the middle part of the lifting seat 401 is fixedly installed with a transparent observation cylinder 403, the four end corners of the lower end surface of the lifting seat 401 are fixedly installed with guide columns 407, the inner side of the bottom end of the lifting seat 401 is installed with a sealed connecting cover 404, a hydraulic oil supercharging shell 406 is installed directly below the sealed connecting cover 404, one side of the partitioning stand 105 is provided with a waist-shaped hole, the infusion hose 109 penetrates through the waist-shaped hole and is fixedly connected with the hydraulic oil supercharging shell 406, and the waist-shaped hole facilitates the follow-up of the infusion hose 109 when the hydraulic oil supercharging shell 406 is moved; A connecting ring 405 is installed between the sealing connecting cover 404 and the hydraulic oil supercharging shell 406, and a sealing gasket is arranged between the connecting ring 405 and the hydraulic oil supercharging shell 406. Both ends of the sealing connecting cover 404 are connected with the connecting ring 405 and the lifting seat 401 through threads. The lifting seat 401 is fixedly connected with the connecting ring 405 through the sealing connecting cover 404. The two anti-deviation positioning tooth plates 308 are symmetrically installed relative to the connecting ring 405. The connecting ring 405 is connected with the adjacent two anti-deviation positioning tooth plates 308 through inter-tooth meshing. An oil seal pressing seat 411 is installed on the inner side of the bottom end of the sealing connecting cover 404. An observation cavity is formed between the sealing connecting cover 404 and the oil seal pressing seat 411. The bottom end of the transparent observation cylinder 403 penetrates the lifting seat 401 and the sealing connecting cover 404 and is inserted into the inner side of the observation cavity. The upper end of the oil seal pressing seat 411 is connected with the connecting ring 405 through threads. The connecting ring 405 is fixedly connected with the hydraulic oil supercharging shell 406 through screws. An oil seal stepped ring 410 is fixedly installed on the inner side of the upper end of the hydraulic oil supercharging shell 406. A supercharging cavity is arranged between the bottom end of the hydraulic oil supercharging shell 406 and the oil seal stepped ring 410. A plurality of oil seal installation grooves are arranged on the upper end face of the oil seal stepped ring 410. The diameters of the plurality of oil seal installation grooves decrease from top to bottom. The plurality of oil seal installation grooves can be used for positioning and installing different types of accessory oil seals. The second transmission shaft 409 is rotatably connected to the inner side of the oil seal stepped ring 410. An accessory oil seal is arranged between the oil seal stepped ring 410 and the oil seal pressing seat 411. The upper end of the second transmission shaft 409 penetrates the supercharging cavity and the oil seal stepped ring 410 and is rotatably connected with the oil seal pressing seat 411 through a roller bearing. The bottom end of the second transmission shaft 409 is provided with a spline sleeve 408. The spline sleeve 408 is rotatably connected with the support partition plate 307 through the swing bearing 306. The upper end of the first transmission shaft 305 penetrates the support partition plate 307 and the swing bearing 306 and is insertedly installed with the spline sleeve 408. The bottom end of the second transmission shaft 409 penetrates the hydraulic oil supercharging shell 406 and is fixedly connected with the spline sleeve 408. The spline sleeve 408 is rotatably connected with the bottom end of the hydraulic oil supercharging shell 406. The support partition plate 307 can rotatably support the spline sleeve 408 through the swing bearing 306, so that the transmission of the spline sleeve 408 is stable.

[0024] In summary, when testing the performance of different types of accessory oil seals in the hydraulic system of a helicopter, a plurality of oil seal installation grooves are arranged on the upper end surface of the oil seal stepped ring 410, and the diameters of the plurality of oil seal installation grooves decrease from top to bottom, so that the positioning and installation of different types of accessory oil seals can be achieved through the plurality of oil seal installation grooves. Then, the accessory oil seals are compressed by the oil seal pressing seat 411 to maintain the sealing and isolation between the oil seal stepped ring 410 and the oil seal pressing seat 411. The power is turned on, and the two ends of the two lifting seats 401 are locked and installed with the upper sealing plate 104 through the locking knobs 402. The power is turned on, and the two booster pumps 108 are started to extract the two types of hydraulic oil in the first and second liquid storage tanks 106 and 107 and inject them into the inside of the booster cavity through the liquid delivery hose 109. At this time, the pressure in the booster cavity increases to realize static pressure boosting test of the two accessory oil seals of the same type in the two dynamic and static test units 4. The transmission motor 304 is started to drive the second transmission shaft 409 to rotate inside the accessory oil seal through the first transmission shaft 305 and the spline sleeve 408 under the support of the support base 301, so that dynamic pressure boosting test of the accessory oil seal can be realized under the condition that the hydraulic oil pressure remains unchanged. The bottom end of the transparent observation cylinder 403 penetrates the lifting seat 401 and the sealing connection cover 404 and is inserted into the inside of the observation cavity, so that whether the hydraulic oil leaks from the inner wall of the bottom end of the oil seal pressing seat 411 can be observed through the transparent observation cylinder 403 to obtain the results of the dynamic and static pressure boosting test of the accessory oil seal in the two types of hydraulic oil. The connecting ring 405 is connected with the adjacent two anti-deviation positioning tooth plates 308 through interlocking, and the connecting ring 405 can be axially limited by the anti-deviation positioning tooth plates 308 to avoid the deflection of the connecting ring 405 with the second transmission shaft 409. Meanwhile, the spline sleeve 408 is rotationally connected with the support partition plate 307 through the rotary bearing 306, so that the support partition plate 307 can rotationally support the spline sleeve 408 through the rotary bearing 306 to maintain the stable transmission of the spline sleeve 408. When the type of the accessory oil seal is replaced, the hydraulic oil is extracted by the booster pump 108 and the pressure in the booster cavity is reduced. Then, the locking knob 402 is separated from the upper sealing plate 104. At this time, the lifting seat 401 is lifted to synchronously drive the sealing connection cover 404, the connecting ring 405, the hydraulic oil booster shell 406, and the spline sleeve 408 to move upwards and separate the spline sleeve 408 from the first transmission shaft 305. The guiding column 407 is guided by the guiding sleeve 303 to facilitate the stable lifting of the lifting seat 401. The sealing connection cover 404 is rotated to be accommodated in the inside of the lifting seat 401 and separated from the connecting ring 405. At this time, the accessory oil seals on the upper end surface of the oil seal stepped ring 410 can be replaced and installed.

[0025] It will be apparent to those skilled in the art that the application is not limited to the details of the above-exemplified embodiments and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics of the present application. The presently disclosed embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference herein to any prior art is to be taken as an admission that the present application is not entitled to antedate such prior art by virtue of prior application. No reference to an item of prior art in any claim is to be construed as an admission that the present application is not entitled to priority to such prior art by virtue of prior application. No reference in the specification to an item of prior art is to be construed as an admission that the present application is not entitled to priority to such prior art by virtue of prior application. No reference in the specification to an item of prior art is to be construed as an admission that the present application is not entitled to priority to such prior art by virtue of prior application. No reference in the specification to an item of prior art is to be construed as an admission that the present application is not entitled to priority to such prior art by virtue of prior application. No reference in the specification to an item of prior art is to be construed as an admission

Claims

1. A comprehensive test device for the oil seals of the accessories of a helicopter hydraulic system, comprising a test oil feed mechanism (1) and two oil seal test mechanisms (2), characterized in that: The inner side of the test liquid supply mechanism (1) is provided with two oil seal test mechanisms (2), which are symmetrically installed relative to the middle part of the test liquid supply mechanism (1), and the oil seal test mechanism (2) is composed of a supporting driving unit (3) and a dynamic and static test unit (4), the dynamic and static test unit (4) is coaxial with the supporting driving unit (3) and located at the upper end of the supporting driving unit (3), the dynamic and static test unit (4) includes a lifting seat (401), both ends of the lifting seat (401) are rotatably connected with locking knobs (402), the middle part of the lifting seat (401) is fixedly installed with a transparent observation cylinder (403), the lower end surface of the lifting seat (401) is fixedly installed with four guide columns (407), the inner side of the bottom end of the lifting seat (401) is installed with a sealing connection cover (404), the sealing connection cover (404) is installed below the hydraulic oil booster shell (406), the sealing connection cover (404) and the hydraulic oil booster shell (406) are installed with a connecting ring (405), the inner side of the bottom end of the sealing connection cover (404) is installed with an oil seal pressing seat (411), the inner side of the upper end of the hydraulic oil booster shell (406) is fixedly installed with an oil seal stepped ring (410), the inner side of the oil seal stepped ring (410) is rotatably connected with a second transmission shaft (409), the bottom end of the second transmission shaft (409) is installed with a spline sleeve (408).

2. A comprehensive test device for a seal of an accessory oil of a hydraulic system of a helicopter according to claim 1, characterized in that: The test liquid supply mechanism (1) includes a test installation box (101), the front end surface of the test installation box (101) is rotatably connected with two box doors (102), the bottom end of the test installation box (101) is slidably connected with a liquid collecting base (103), the rear end surface of the test installation box (101) is fixedly installed with a breathable back plate (110), the upper end of the test installation box (101) is fixedly installed with an upper sealing plate (104), two partition plates (105) are fixedly installed between the test installation box (101) and the upper sealing plate (104), a first liquid storage tank (106) and a second liquid storage tank (107) are fixedly installed between the two ends of the two partition plates (105), respectively, the first liquid storage tank (106) is located above the second liquid storage tank (107), two booster pumps (108) are installed between the first liquid storage tank (106) and the second liquid storage tank (107), the bottom end of the booster pump (108) is fixedly installed with a liquid delivery hose (109).

3. A comprehensive test device for a seal of an accessory oil of a hydraulic system of a helicopter according to claim 2, characterized in that: The support drive unit (3) comprises a support base (301), the four end corners of the upper end face of the support base (301) are fixedly installed with guide sleeves (303), the outer sides of the upper ends of the four guide sleeves (303) are fixedly installed with two anti-deviation positioning tooth plates (308), the surfaces of the two ends of the support base (301) are each provided with a plurality of drainage holes (302), the inner side of the middle part of the support base (301) is fixedly installed with a transmission motor (304), the output end of the transmission motor (304) is fixedly installed with a first transmission shaft (305), the outer side of the upper end of the first transmission shaft (305) is rotatably connected with a support partition plate (307), the middle part of the upper end face of the support partition plate (307) is fixedly installed with a slewing bearing (306).

4. A comprehensive test apparatus for a seal of an accessory oil of a hydraulic system of a helicopter according to claim 3, characterized in that: The test installation box (101) is fixedly connected with the bottom ends of the two support bases (301), the inner side of the test installation box (101) is through connection with the liquid collecting base (103) through a plurality of drainage holes (302), the four end corners of the support partition plate (307) are all fixedly sleeved on the outer sides of the four guide sleeves (303), the two anti-deviation positioning tooth plates (308) are located directly above the support partition plate (307), the two anti-deviation positioning tooth plates (308) are symmetrically installed relative to the connecting ring (405), the connecting ring (405) is connected with the adjacent two anti-deviation positioning tooth plates (308) through intermeshing.

5. A comprehensive test apparatus for a seal of an accessory oil of a hydraulic system of a helicopter according to claim 4, characterized in that: The spline sleeve (408) is rotatably connected with the support partition plate (307) through the slewing bearing (306), the upper end of the first transmission shaft (305) penetrates the support partition plate (307) and the slewing bearing (306) and is insertedly installed with the spline sleeve (408), the bottom end of the second transmission shaft (409) penetrates the hydraulic oil supercharging shell (406) and is fixedly connected with the spline sleeve (408), and the spline sleeve (408) is rotatably connected with the bottom end of the hydraulic oil supercharging shell (406).

6. A comprehensive test apparatus for a seal of an accessory oil of a hydraulic system of a helicopter according to claim 5, characterized in that: The bottom end of the hydraulic oil supercharging shell (406) is provided with a supercharging cavity between the oil seal stepped ring (410), the upper end face of the oil seal stepped ring (410) is provided with a plurality of oil seal installation grooves, the diameter sizes of the plurality of oil seal installation grooves gradually decrease from top to bottom, an accessory oil seal is arranged between the oil seal stepped ring (410) and the oil seal pressing seat (411), and the upper end of the second transmission shaft (409) penetrates the supercharging cavity and the oil seal stepped ring (410) and is rotatably connected with the oil seal pressing seat (411) through a roller bearing.

7. A comprehensive test apparatus for a seal of an accessory oil of a hydraulic system of a helicopter according to claim 6, characterized in that: The supercharging pump (108) is fixedly connected with the partition stand (105), the upper ends of the two supercharging pumps (108) are respectively through-connected with the first liquid storage tank (106) and the second liquid storage tank (107), and the interiors of the first liquid storage tank (106) and the second liquid storage tank (107) are respectively filled with MIL-PRF-83282D standard hydraulic oil and YH-15 aviation hydraulic oil.

8. A comprehensive test apparatus for a seal of an accessory oil of a hydraulic system of a helicopter according to claim 7, characterized in that: One side of the partition stand (105) is provided with a waist type hole, the infusion hose (109) penetrates the waist type hole and is fixedly connected with the hydraulic oil pressurizing shell (406), the pressurizing cavity is connected with the pressurizing pump (108) through the infusion hose (109).

9. A comprehensive test apparatus for a seal of a helicopter hydraulic system accessory according to claim 8, characterized in that: The upper end of the oil seal press seat (411) is connected with the connecting ring (405) through threads, the connecting ring (405) is fixedly connected with the hydraulic oil pressurizing shell (406) through screws, a sealing gasket is arranged between the connecting ring (405) and the hydraulic oil pressurizing shell (406), the two ends of the sealing connecting cover (404) are connected with the connecting ring (405) and the lifting seat (401) through threads, and the lifting seat (401) is fixedly connected with the connecting ring (405) through the sealing connecting cover (404).

10. A comprehensive test apparatus for a seal of an accessory oil of a hydraulic system of a helicopter according to claim 9, characterized in that: An observation cavity is formed between the sealing connecting cover (404) and the oil seal press seat (411), the bottom end of the transparent observation cylinder (403) penetrates the lifting seat (401) and the sealing connecting cover (404) and is inserted into the inner side of the observation cavity, and the two ends of the upper sealing plate (104) are locked and installed on the two ends of the two lifting seats (401) through the locking knobs (402).

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