A multifunctional modular engine transmission system test bench

Abstract

The present invention relates to the field of machinery, and is a multifunctional modular engine transmission system test bench. When the test bench is tested with a central transmission device, the main speed-increasing gearbox is connected to the central cone box through the main speed-increasing high-speed output coupling, and the tested central transmission device is installed in the central cone box and connected to the tested engine casing through a transmission rod; when the test bench is tested without a central transmission device, the main speed-increasing gearbox is connected to the upper bevel gearbox through the upper bevel box input coupling, and the upper bevel gearbox is connected to the tested engine casing through the central bevel coupling and the transmission rod. It can simulate the actual working conditions of the product to a greater extent. At the same time, the test bench has modular characteristics, and can realize the test of different products by moving the position and number of gearboxes. At the same time, the test bench can realize complex tests such as dynamic stress test, high temperature environment test, transmission error test, temperature measurement test, etc. by installing different tooling.

Description

Technical Field

[0001] The invention relates to the field of machinery, and in particular to a test device comprising an engine casing, a flight casing, a central cone and accessories thereof, in particular to a multifunctional modular engine transmission system test vehicle platform. Background Art

[0002] The system-level test is a system joint test that combines the central transmission device, central transmission rod, engine casing, power take-off shaft, flight casing, oil accessories and other components of the aircraft / engine to simulate their actual installation status and working environment conditions. Combined with the development trend of future aircraft engine transmission systems, the working coupling relationship between components cannot be reflected in the component test, which is different from the actual working conditions of aircraft engines. The system-level test can simulate the actual working conditions of the product to a greater extent, meet the technical requirements of complex power spectrum extraction of the transmission system, and conduct system-level assessment and verification of each component of the transmission system and its connected parts, strengthen the coupling relationship between the components, avoid signal transmission and interference deviations caused by component-level tests, expose and solve problems to the maximum extent before the engine test, reduce hidden dangers in the whole machine, and shorten the development cycle. Summary of the invention

[0003] The present invention provides a multifunctional modular engine transmission system test bench, which can realize the test of the transmission system with an engine attachment casing, a flight attachment casing, and a central cone on the tester, and can simulate the actual working conditions of the product to a greater extent. At the same time, the test bench has modular characteristics, and can realize the test of different products by moving the position and number of gear boxes. At the same time, the test bench can realize complex tests such as dynamic stress test, high temperature environment test, transmission error test, temperature measurement test, etc. by installing different tooling.

[0004] The present application provides a multifunctional modular engine transmission system test bench, the device comprising a bevel gearbox 1, a main speed-increasing input coupling 2, a main speed-increasing gearbox 3, a main speed-increasing low-speed output coupling 4, a main speed-increasing high-speed output coupling 5, an upper bevel gearbox 6, a central bevel adapter sleeve 7, a central bevel high-speed shaft 8, a central bevel square box 9, a flying attachment low-speed load gearbox 10, a flying attachment low-speed diaphragm coupling 11, a flying attachment high-speed load gearbox 12, a flying attachment high-speed diaphragm disc coupling 13, Load 1 gearbox 14, load 1 end coupling 15, load 1 adapter sleeve 16, load 2 adapter seat 17, load 3 mounting gearbox 18, load 4 load gearbox 19, load 4 end diaphragm coupling 20, load 4 adapter sleeve 21, load 5 load gearbox 22, load 5 end coupling 23, load 5 end adapter sleeve 24, load 6 end adapter sleeve 25, load 6 end coupling 26, load 6 load gearbox 27, main traction motor coupling 28, main traction motor 29.

[0005] The test bench is arranged with two traction motors as the power source at the far left, and the traction motors are symmetrically distributed on both sides of the cone parallel gearbox, and are installed on the main traction motor bracket together with the cone parallel gearbox through the two traction motors;

[0006] The output end of the cone parallel gearbox of the test bench is connected to the input end of the main speed-increasing gearbox through the main speed-increasing input diaphragm coupling;

[0007] The main speed increasing gearbox of the test bench has two output ends. The high-speed output end is at the bottom of the gearbox and is connected to the high-speed shaft in the central cone box through a diaphragm coupling. The central cone is installed on the high-speed shaft; the low-speed output end is at the top of the gearbox and is connected to the upper cone box through a diaphragm coupling.

[0008] The central cone box of the test bench is installed below the upper cone box. When the test is carried out without the central cone real accessories, the central cone adapter sleeve is installed in the central cone box to replace the central cone.

[0009] The test bench product bracket is designed according to the installation structure of different auxiliary casings. The product bracket is installed under the central cone square box for installing the auxiliary casing test piece. The auxiliary casing test piece is connected to the central cone or the central adapter sleeve through the transmission shaft;

[0010] The test bench test case load 1 is connected to the load 1 adapter sleeve through a quick release ring, and the load 1 adapter sleeve is connected to the load 1 gearbox through the load 1 end coupling.

[0011] The test bench test casing load 2 is fixed to the load 2 adapter through a quick release ring, and the load 2 adapter is directly connected to the loading simulation pump for loading;

[0012] The test bench tested casing load 3 is connected to the load 3 mounting gear box by fastening screws;

[0013] The test bench test casing load 4 is connected to the casing end adapter sleeve of load 4 through a quick release ring, the casing end adapter sleeve of load 4 is connected to the gearbox end adapter sleeve of load 4 through a diaphragm coupling at the end of load 4, and the gearbox end adapter sleeve of load 4 is connected to the gearbox of load 4 through a fastening screw;

[0014] When the flying attachment end of the test bench simulates loading, it is connected to the flying attachment high-speed load gearbox through the flying attachment high-speed diaphragm coupling, and the flying attachment high-speed load gearbox is connected to the flying attachment low-speed load gearbox through the flying attachment low-speed diaphragm coupling; when the flying attachment end is loaded using a real accessory casing, the flying attachment end is connected to the flying attachment casing through the flying attachment high-speed diaphragm coupling;

[0015] The test bench is connected to the load 5 of the test flight casing through a quick release ring and the load 5 adapter sleeve, and the load 5 adapter sleeve is connected to the load 5 gearbox through the load 5 end coupling;

[0016] The test bench test case load 6 is connected to the load 6 adapter sleeve through a quick release ring, and the load 6 adapter sleeve is connected to the load 6 gear box through the load 6 end coupling

[0017] The power source of the test bench is two traction motors, which provide power to the bench through a cone-type gearbox.

[0018] The main speed increasing gearbox is a single-input dual-output structure, the high-speed output end is connected to the central cone box, and the low-speed output end is connected to the upper cone box.

[0019] The launch attachment receiver can carry up to five accessories, including load 1 which simulates the gearbox loading method through low speed and large load, load 2 which simulates the gearbox loading method through high speed and large load, load 2 which simulates the gearbox loading method through adapter loading method, load 3 which is mounted on the gearbox loading method and flying attachment end loading.

[0020] The flying attachment end loading can realize the test of the casing with real attachments. When the casing loading test is not carried out with real attachments, the flying attachment high-speed load gearbox is used to replace the flying attachment casing for loading.

[0021] The diaphragm specification used to connect the traction motor and the cone-parallel gearbox is φ215mm, and the diaphragm specification used to connect the cone-parallel gearbox and the main speed-increasing gearbox is φ230mm.

[0022] The coaxiality requirements for the connection between the traction motor and the cone-parallel gearbox are that the opening accuracy is less than 0.1mm and the misalignment accuracy is less than 0.2mm. The coaxiality requirements for the connection between the cone-parallel gearbox and the main speed increase gearbox are that the opening accuracy is less than 0.1mm and the misalignment accuracy is less than 0.2mm.

[0023] The central cone box can be equipped with hydraulic cylinders in all directions, and the axial and radial forces on the central cone can be loaded through the thrust bearing acting on the high-speed shaft.

[0024] A gear box bracket is installed under each gear box to achieve alignment of the connecting ports of each gear box. At the same time, the height and position of the gear box bracket can be changed to achieve adaptation to different products.

[0025] The test bench can carry out complex tests by installing special tooling for special tests, can carry out dynamic stress tests by installing dynamic stress test tooling, can carry out transfer error tests by installing transfer error test tooling, can carry out high temperature tests by installing temperature measurement test tooling, and can carry out high temperature environmental tests by installing environmental chamber tooling.

[0026] In summary, the present invention provides a multifunctional modular engine transmission system test bench, which can realize the test of the transmission system with an engine casing, a flight casing, and a central cone on the tester, and can simulate the actual working conditions of the product to a greater extent. At the same time, the test bench has modular characteristics, and can realize tests on different products by moving the position and number of gear boxes. At the same time, the test bench can realize complex tests such as dynamic stress tests, high temperature environment tests, transmission error tests, temperature measurement tests, etc. by installing different tooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the structure of a multifunctional modular engine transmission system test bench provided in this application;

[0028] Among them: 1-cone parallel gearbox, 2-main speed increase input coupling, 3-main speed increase gearbox, 4-main speed increase low speed output coupling, 5-main speed increase high speed output coupling, 6-upper bevel gearbox, 7-central bevel adapter sleeve, 8-central bevel high speed shaft, 9-central bevel square box, 10-flying attachment low speed load gearbox, 11-flying attachment low speed diaphragm coupling, 12-flying attachment high speed load gearbox, 13-flying attachment high speed diaphragm coupling, 14-load 1 gearbox, 15-load 1 End coupling, 16-load 1 adapter sleeve, 17-load 2 adapter seat, 18-load 3 mounting gearbox, 19-load 4 load gearbox, 20-load 4 end diaphragm coupling, 21-load 4 adapter sleeve, 22-load 5 load gearbox, 23-load 5 end coupling, 24-load 5 end adapter sleeve, 25-load 6 end adapter sleeve, 26-load 6 end coupling, 27-load 6 load gearbox, 28-main traction motor coupling, 29-main traction motor.

[0029] Figure 2 A top view of a multifunctional modular engine transmission system test bench provided in this application;

[0030] Figure 3 A partially enlarged view of a multifunctional modular engine transmission system test bench provided in this application. DETAILED DESCRIPTION

[0031] The leftmost end of the test bench is two traction motors of the power source. The traction motors are symmetrically distributed on both sides of the cone parallel gearbox and are connected to the cone parallel gearbox through the main traction motor coupling. The two traction motors are installed on the main traction motor bracket together with the cone parallel gearbox. The output end of the cone parallel gearbox is connected to the input end of the main speed-increasing gearbox through the main speed-increasing input diaphragm coupling. The main speed-increasing gearbox has two output ends. When the central cone is tested, the high-speed output end of the main speed-increasing gearbox is used. The high-speed output end is below the gearbox and is connected to the high-speed shaft in the central cone box through the diaphragm coupling. The central cone is installed on the high-speed shaft. Hydraulic cylinders can be installed in all directions of the central cone box. The axial force and radial force loading of the central cone are achieved by applying force to the thrust bearing on the high-speed shaft of the central cone. When the central cone is not tested, the low-speed output end of the main speed-increasing gearbox is used. The low-speed output end is above the gearbox and is connected to the upper cone box through the diaphragm coupling. The central cone box is installed below the upper cone box. The central cone adapter sleeve is installed in the central cone box to replace the central cone. The product bracket is installed under the central cone box to install the test piece of the flight accessory receiver. The product bracket can be designed according to the installation structure of different flight accessory receivers. The test piece of the flight accessory receiver is connected to the central cone or the central adapter sleeve through the transmission shaft.

[0032] The test bench's engine casing loading method can achieve 5 different types of loading. Among them, load 1 is a low-speed, high-load loading method using a coupling. Casing load 1 is connected to the load 1 adapter sleeve through a quick-release ring, and the load 1 adapter sleeve is connected to the load 1 gearbox through the load 1 end coupling to achieve loading. Load 2 is a low-speed, low-load loading method. Casing load 2 is fixed to the load 2 adapter seat through a quick-release ring, and the load 2 adapter seat is directly connected to the loading simulation pump for loading. Load 3 is a high-speed, low-load loading method. Casing load 3 is connected to the load 3 mounting gearbox through a fastening screw, and a plunger pump is installed on the load 3 mounting gearbox for loading. Load 4 is a high-speed, high-load loading method using a coupling. Casing load 4 is connected to the load 4 casing end adapter sleeve through a quick-release ring, and the load 4 casing end adapter sleeve is connected to the load 4 gearbox end adapter sleeve through the load 4 end diaphragm coupling, and the load 4 gearbox end adapter sleeve is connected to the load 4 gearbox through a fastening screw.

[0033] The flight engine joint test or simulated loading of the flight attachment end of the test bench. When simulating loading, the engine attachment casing is connected to the flight attachment high-speed load gearbox through the flight attachment high-speed diaphragm coupling, and the flight attachment high-speed load gearbox is connected to the flight attachment low-speed load gearbox through the flight attachment low-speed diaphragm coupling. When the flight attachment end uses a real accessory casing for loading, the flight attachment end is connected to the flight attachment casing through the flight attachment high-speed diaphragm coupling, the flight attachment casing is installed on the flight attachment mounting bracket, the flight attachment casing load 5 is connected to the load 5 adapter sleeve through the quick release ring, and the load 5 adapter sleeve is connected to the load 5 gearbox through the load 5 end coupling. The casing load 6 is connected to the load 6 adapter sleeve through the quick release ring, and the load 6 adapter sleeve is connected to the load 6 gearbox through the load 6 end coupling.

[0034] The test bench can realize dynamic stress test by installing dynamic stress test tooling at the central cone box, can realize transfer error test by installing transfer error test tooling at the central cone box, can realize temperature measurement test by installing temperature measurement test tooling at the accessory casing or the central cone, and can realize high temperature environment test by installing environmental chamber tooling around the accessory casing.

[0035] The present application provides a multifunctional modular engine transmission system test bench, the device comprising a bevel gearbox 1, a main speed-increasing input coupling 2, a main speed-increasing gearbox 3, a main speed-increasing low-speed output coupling 4, a main speed-increasing high-speed output coupling 5, an upper bevel gearbox 6, a central bevel adapter sleeve 7, a central bevel high-speed shaft 8, a central bevel square box 9, a flying attachment low-speed load gearbox 10, a flying attachment low-speed diaphragm coupling 11, a flying attachment high-speed load gearbox 12, a flying attachment high-speed diaphragm disc coupling 13, Load 1 gearbox 14, load 1 end coupling 15, load 1 adapter sleeve 16, load 2 adapter seat 17, load 3 mounting gearbox 18, load 4 load gearbox 19, load 4 end diaphragm coupling 20, load 4 adapter sleeve 21, load 5 load gearbox 22, load 5 end coupling 23, load 5 end adapter sleeve 24, load 6 end adapter sleeve 25, load 6 end coupling 26, load 6 load gearbox 27, main traction motor coupling 28, main traction motor 29.

[0036] The test bench is arranged with two traction motors as the power source at the far left, and the traction motors are symmetrically distributed on both sides of the cone parallel gearbox, and are installed on the main traction motor bracket together with the cone parallel gearbox through the two traction motors;

[0037] The output end of the cone parallel gearbox of the test bench is connected to the input end of the main speed-increasing gearbox through the main speed-increasing input diaphragm coupling;

[0038] The main speed increasing gearbox of the test bench has two output ends. The high-speed output end is at the bottom of the gearbox and is connected to the high-speed shaft in the central cone box through a diaphragm coupling. The central cone is installed on the high-speed shaft; the low-speed output end is at the top of the gearbox and is connected to the upper cone box through a diaphragm coupling.

[0039] The central cone box of the test bench is installed below the upper cone box. When the test is carried out without the central cone real accessories, the central cone adapter sleeve is installed in the central cone box to replace the central cone.

[0040] The test bench product bracket is designed according to the installation structure of different auxiliary casings. The product bracket is installed under the central cone square box for installing the auxiliary casing test piece. The auxiliary casing test piece is connected to the central cone or the central adapter sleeve through the transmission shaft;

[0041] The test bench test case load 1 is connected to the load 1 adapter sleeve through a quick release ring, and the load 1 adapter sleeve is connected to the load 1 gearbox through the load 1 end coupling.

[0042] The test bench test casing load 2 is fixed to the load 2 adapter through a quick release ring, and the load 2 adapter is directly connected to the loading simulation pump for loading;

[0043] The test bench tested casing load 3 is connected to the load 3 mounting gear box by fastening screws;

[0044] The test bench test casing load 4 is connected to the casing end adapter sleeve of load 4 through a quick release ring, the casing end adapter sleeve of load 4 is connected to the gearbox end adapter sleeve of load 4 through a diaphragm coupling at the end of load 4, and the gearbox end adapter sleeve of load 4 is connected to the gearbox of load 4 through a fastening screw;

[0045] When the flying attachment end of the test bench simulates loading, it is connected to the flying attachment high-speed load gearbox through the flying attachment high-speed diaphragm coupling, and the flying attachment high-speed load gearbox is connected to the flying attachment low-speed load gearbox through the flying attachment low-speed diaphragm coupling; when the flying attachment end is loaded using a real accessory casing, the flying attachment end is connected to the flying attachment casing through the flying attachment high-speed diaphragm coupling;

[0046] The test bench is connected to the load 5 of the test flight casing through a quick release ring and the load 5 adapter sleeve, and the load 5 adapter sleeve is connected to the load 5 gearbox through the load 5 end coupling;

[0047] The test bench test case load 6 is connected to the load 6 adapter sleeve through a quick release ring, and the load 6 adapter sleeve is connected to the load 6 gear box through the load 6 end coupling

[0048] 2. Preferably, the power source of the test bench is two traction motors, which jointly provide power to the bench through a cone-connected gearbox.

[0049] 3. Preferably, the main speed increasing gearbox has a single-input and dual-output structure, the high-speed output end is connected to the central cone square box, corresponding to the central cone test, and the low-speed output end is connected to the upper cone box, corresponding to the non-central cone test.

[0050] 4. Preferably, the launch attachment receiver can carry up to five accessories, including load 1 for simulating gear box loading by low speed and large load, load 2 for simulating gear box loading by high speed and large load, load 2 for adapter loading, load 3 for mounting gear box loading and flying attachment end loading.

[0051] 5. Preferably, the flying attachment end loading can realize the test with a real attachment receiver. When the loading test is not carried out with a real attachment receiver, a flying attachment high-speed load gearbox is used instead of the flying attachment receiver for loading.

[0052] 6. Preferably, the diaphragm specification used for connecting the traction motor with the bevel gearbox is φ215, the diaphragm specification used for connecting the bevel gearbox with the main speed-increasing gearbox is φ230, the diaphragm specification used for connecting the low-speed end of the main speed-increasing gearbox with the upper bevel box is φ230, the diaphragm specification used for connecting the high-speed end of the main speed-increasing gearbox with the high-speed shaft of the central bevel box is φ135, the diaphragm specification used at each load end is φ100, the specification of the high-speed coupling at the flying attachment end is φ121, and the specification of the low-speed diaphragm coupling at the flying attachment end is φ148.

[0053] 7. Preferably, the coaxiality of the connection between the traction motor and the cone-parallel gearbox requires an opening accuracy of less than 0.1mm and a misalignment accuracy of less than 0.2mm, the coaxiality of the connection between the cone-parallel gearbox and the main speed-increasing gearbox requires an opening accuracy of less than 0.1mm and a misalignment accuracy of less than 0.2mm, the coaxiality of the connection between the low-speed end of the main speed-increasing gearbox and the upper cone box requires an opening accuracy of less than 0.1mm and a misalignment accuracy of less than 0.2mm, the coaxiality of the connection between the high-speed end of the main speed-increasing gearbox and the high-speed shaft of the central cone square box requires an opening accuracy of less than 0.05mm and a misalignment accuracy of less than 0.1mm, the coaxiality of the couplings at each load end requires an opening accuracy of less than 0.05mm and a misalignment accuracy of less than 0.1mm, the coaxiality of the high-speed coupling at the flying attachment end requires an opening accuracy of less than 0.05mm and a misalignment accuracy of less than 0.1mm, and the coaxiality of the low-speed diaphragm coupling at the flying attachment end requires an opening accuracy of less than 0.05mm and a misalignment accuracy of less than 0.1mm.

[0054] 8. Preferably, the central cone box can be equipped with hydraulic cylinders in all directions, and the axial force and radial force loading on the central cone can be achieved through the thrust bearing acting on the high-speed shaft.

[0055] 9. Preferably, a gear box bracket is installed under each gear box to achieve alignment of the connecting ports of each gear box, and adaptation to different products can be achieved by changing the height and position of the gear box bracket.

[0056] 10. Preferably, the test bench can realize complex tests by installing special tools for special tests, can realize dynamic stress tests by installing dynamic stress test tools, can realize transfer error tests by installing transfer error test tools, can realize high temperature tests by installing temperature measurement test tools, and can realize high temperature environment tests by installing environmental chamber tools.

[0057] In summary, the present invention provides a multifunctional modular engine transmission system test bench, which can realize the test of the transmission system with an engine casing, a flight casing, and a central cone on the tester, and can simulate the actual working conditions of the product to a greater extent. At the same time, the test bench has modular characteristics, and can realize tests on different products by moving the position and number of gear boxes. At the same time, the test bench can realize complex tests such as dynamic stress tests, high temperature environment tests, transmission error tests, temperature measurement tests, etc. by installing different tooling.

Claims

1. A multifunctional modular engine transmission system test bench, characterized in that: Including cone parallel gearbox, main speed increase input coupling, main speed increase gearbox, upper cone box input coupling, main speed increase high-speed output coupling, upper cone gearbox, central cone coupling, central cone adapter sleeve, central cone square box, flying attachment low-speed load gearbox, flying attachment low-speed diaphragm coupling, flying attachment high-speed load gearbox, flying attachment high-speed diaphragm disc coupling, load 1 gearbox, load 1 end coupling, load 2 adapter seat, load 3 mounting gearbox, load 4 gearbox, load 4 end diaphragm disc coupling, load 4 casing end adapter sleeve, load 4 gearbox end adapter sleeve, load 5 load gearbox, load 5 end coupling, load 5 end adapter sleeve, load 6 end adapter sleeve, load 6 end coupling, load 6 gearbox, main drag motor coupling 1, main drag motor coupling 2, main drag motor, including: The test bench is arranged with two traction motors as the power source at the far left end. The traction motors are symmetrically distributed on both sides of the cone-parallel gearbox, and are installed on the main traction motor bracket together with the cone-parallel gearbox through the two traction motors; the output end of the cone-parallel gearbox of the test bench is connected to the input end of the main speed-increasing gearbox through the main speed-increasing input diaphragm coupling; the main speed-increasing gearbox of the test bench has two output ends, the high-speed output end is below the gearbox, and is connected to the high-speed shaft in the central cone box through a diaphragm coupling, and the central cone is installed on the high-speed shaft; the low-speed output end Above the gearbox, it is connected to the upper cone box through a diaphragm coupling. The central cone box of the test bench is installed below the upper cone box. The product bracket is installed below the central cone box to install the flying accessory casing test piece. The flying accessory casing test piece is connected to the central cone or the central adapter sleeve through a transmission shaft; the test bench casing load 1 is connected to the load 1 adapter sleeve through a quick release ring, and the load 1 adapter sleeve is connected to the load 1 gearbox through the load 1 end coupling. The test bench casing load 2 is fixed to the load 2 adapter seat through a quick release ring, and the load 2 adapter seat is connected to the load 1 gearbox through a load 1 end coupling. The seat is directly connected to the loading simulation pump for loading; the test vehicle platform test casing load 3 is connected to the load 3 mounting gearbox through the fastening screws; the test vehicle platform test casing load 4 is connected to the load 4 casing end adapter sleeve through the quick release ring, the load 4 casing end adapter sleeve is connected to the load 4 gearbox end adapter sleeve through the load 4 end diaphragm coupling, and the load 4 gearbox end adapter sleeve is connected to the load 4 gearbox through the fastening screws; when the flying attachment end of the test vehicle platform simulates loading, it is connected to the flying attachment high-speed load gearbox through the flying attachment high-speed diaphragm coupling. The flying attachment high-speed load gearbox is connected to the flying attachment low-speed load gearbox through the flying attachment low-speed diaphragm coupling; when the flying attachment end is loaded with a real accessory casing, the flying attachment end is connected to the flying attachment casing through the flying attachment high-speed diaphragm coupling; the test vehicle bench tested flying attachment casing load 5 is connected to the load 5 adapter sleeve through a quick release ring, and the load 5 adapter sleeve is connected to the load 5 gearbox through the load 5 end coupling; the test vehicle bench tested casing load 6 is connected to the load 6 adapter sleeve through a quick release ring, and the load 6 adapter sleeve is connected to the load 6 gearbox through the load 6 end coupling.

2. A multifunctional modular engine transmission system test bench according to claim 1, characterized in that: The power source of the test bench is two traction motors, which provide power to the bench through a cone-type gearbox.

3. The multifunctional modular engine transmission system test bench according to claim 1, characterized in that: The main speed increasing gearbox is a single-input dual-output structure, the high-speed output end is connected to the central cone box, and the low-speed output end is connected to the upper cone box.

4. The multifunctional modular engine transmission system test bench according to claim 1, characterized in that: The flying attachment receiver can carry up to five accessories, including load 1 for simulating gearbox loading through low speed and large load, load 2 for simulating gearbox loading through high speed and large load, load 2 for adapter loading, load 3 for mounting gearbox loading and flying attachment end loading.

5. The multifunctional modular engine transmission system test bench according to claim 1, characterized in that: The flying attachment end loading realizes the test of the casing with real attachments. When the casing loading test is not carried out with real attachments, the flying attachment high-speed load gearbox is used to replace the flying attachment casing for loading.

6. The multifunctional modular engine transmission system test bench according to claim 1, characterized in that: The diaphragm specification used to connect the traction motor and the cone-parallel gearbox is φ215mm, and the diaphragm specification used to connect the cone-parallel gearbox and the main speed-increasing gearbox is φ230mm.

7. The multifunctional modular engine transmission system test bench according to claim 1, characterized in that: The coaxiality requirements for the connection between the traction motor and the cone-parallel gearbox are that the opening accuracy is less than 0.1mm and the misalignment accuracy is less than 0.2mm. The coaxiality requirements for the connection between the cone-parallel gearbox and the main speed increase gearbox are that the opening accuracy is less than 0.1mm and the misalignment accuracy is less than 0.2mm.

8. The multifunctional modular engine transmission system test bench according to claim 1, characterized in that: The central cone box can be equipped with hydraulic cylinders in all directions, and the axial and radial forces on the central cone can be loaded through the thrust bearing acting on the high-speed shaft.

9. The multifunctional modular engine transmission system test bench according to claim 1, characterized in that: A gear box bracket is installed under each gear box to achieve alignment of the connection ports of each gear box, and adaptation to different products is achieved by changing the height and position of the gear box bracket.

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