Performance test device for high-frequency vibration absorber of main speed reducer

Abstract

The invention provides a performance test device for a high-frequency vibration absorber of a main speed reducer. The device comprises a speed reducer rack assembly, a vibration excitation joint assembly and a vibration exciter assembly, wherein the main speed reducer rack assembly is used for simulating real installation boundary conditions of vibration absorbers, and the vibration absorbers are installed on four supporting rods respectively; the shock excitation joint assembly is used for connecting the main speed reducer and the shock excitation rod and realizing multi-directional excitation; the excitation position of the vibration exciter assembly can be adjusted; the invention provides a main speed reducer high-frequency vibration absorber performance testing device which is simple in structure and convenient to operate, and multi-angle and high-precision testing of the performance of a speed reducer vibration absorber is achieved.

Description

Technical Field

[0001] The present application belongs to the technical field of vibration test devices, and in particular relates to a performance test device for a high-frequency vibration absorber of a main reducer. Background Art

[0002] By installing a vibration absorber on the main reducer strut, the transmission of high-frequency vibration when the main reducer gear is meshing can be effectively suppressed, thereby further achieving vibration reduction and noise reduction in the helicopter cabin. The installation natural frequency of the vibration absorber has a great influence on the vibration absorption effect, and different installation states of the vibration absorber affect the installation natural frequency.

[0003] In order to test the performance of the vibration absorber under different installation conditions, a test bench needs to be built. In previous studies, a few literature materials only stayed at the numerical simulation analysis stage, without specific test implementation methods.

[0004] To this end, the present invention establishes a main reducer high-frequency vibration absorber performance test device to explore the vibration absorption effect under different vibration absorber installation conditions, and further designs vibration and noise reduction in the helicopter cabin. Summary of the invention

[0005] In view of the above technical problems, the present application provides a main reducer high-frequency vibration absorber performance test device, the device includes a reducer bench assembly, an excitation joint assembly, and an exciter assembly;

[0006] Among them, the main reducer bench assembly is used to simulate the actual installation boundary conditions of the vibration absorber, and the vibration absorbers 16 are respectively installed on the four support rods;

[0007] The excitation joint assembly is used to connect the main reducer 1 and the excitation rod 7 and realize multi-directional excitation;

[0008] Vibrator assembly with adjustable excitation position.

[0009] Preferably, the main reducer test bench assembly includes a reducer 1 and a suspension device, and the reducer is connected to a crane in a test plant through the suspension device.

[0010] Preferably, the suspension device comprises a connecting plate 17, a lifting ring 3, and a first elastic rope 4. The connecting plate 17 is a rectangular steel plate, and the four corners are connected to the top of the central shaft of the main reducer by bolts. The lifting ring 3 is installed at the center of the connecting plate 17.

[0011] Preferably, the first elastic rope 4 is wound into a circle and fixed by three buckles, and its two ends are respectively connected to the lifting ring 3 and the test plant hanging hook.

[0012] Preferably, the excitation joint assembly includes a clamp 2, a connecting rod 5, and an adapter 6. The clamp 2 is composed of a left clamp part 21 and a right clamp part 22, and is clamped to the central axis of the reducer by bolts, and then connected to the adapter 6 by the connecting rod 5.

[0013] Preferably, the connecting rod 5 is a protruding six-sided cube in the middle to facilitate the installation of the connecting rod 5. There are threads at both ends of the connecting rod 5. After being connected to the right clamp part 22 and the adapter 6, the two ends are tightened by nuts.

[0014] Preferably, the adapter 6 is a trapezoidal cube, and threaded holes perpendicular to the surfaces are respectively opened at the center of the front face 61, the side face 62, and the inclined face 63 of the adapter. All three holes are connected to the adapter 6. By changing the connection position of the threaded holes of the adapter 6 and the connecting rod 5 and the exciting rod 7, excitation in four directions can be achieved.

[0015] Preferably, the exciting rod 7 includes an extension rod 71, a force sensor 72, a left clamping nut 73, an exciting force rod 74, and a right clamping nut 75. The two ends of the extension rod 71 are connected to the adapter 6 and the force sensor 72 through threads, and the two ends of the exciting force rod 74 are respectively covered with a left clamping nut 73 and a right clamping nut 74, which are respectively connected to the force sensor 72 and the exciter 8.

[0016] This application has the following technical effects:

[0017] The present application provides a main reducer high-frequency vibration absorber performance test device, which has a simple structure and is easy to operate, and can achieve multi-angle and high-precision testing of the reducer vibration absorber performance.

[0018] The position of the vibration exciter is adjustable to meet the testing requirements of high-frequency vibration absorbers of different types of helicopters.

[0019] The reducer is connected to the overhead crane through lifting rings and elastic ropes, which improves stability during the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the main reducer high frequency vibration absorber performance test device;

[0021] Figure 2 is a schematic diagram of the structure of a clamp assembly;

[0022] Figure 3 It is a schematic diagram of the adapter structure;

[0023] Figure 4 It is a schematic diagram of the structure of the excitation rod;

[0024] Figure 5 is a schematic diagram of the supporting frame structure;

[0025] Among them: 1. main reducer; 2. clamp, 21 clamp left part, 22, clamp right part; 3. lifting ring; 4. first elastic rope; 5. extension rod; 6. adapter, 61, adapter front, 62, adapter side, 63 adapter inclined surface; 7. exciting rod, 71, extension rod, 72, force sensor, 73, left clamping nut, 74, exciting force rod, 75, right clamping nut; 8. exciter; 9. second elastic rope; 10. suspension rod; 11. T-bolt; 12. vertical guide rod; 13. longitudinal support plate; 14. transverse moving plate; 15. support frame; 16. high-frequency vibration absorber; 17. connecting plate. DETAILED DESCRIPTION

[0026] The present application provides a main reducer high-frequency vibration absorber performance test device, the device comprising a reducer bench assembly, an exciting joint assembly, and an exciter assembly.

[0027] Among them, the main reducer test bench assembly is used to simulate the actual installation boundary conditions of the vibration absorber, and the vibration absorbers are installed on the four support rods respectively; the excitation joint assembly is used to connect the main reducer and the excitation rod and realize multi-directional excitation; the exciter assembly can adjust the excitation position.

[0028] The present application provides a main reducer high-frequency vibration absorber performance test device, which has a simple structure and is easy to operate, and can achieve multi-angle and high-precision testing of the reducer vibration absorber performance.

[0029] The position of the vibration exciter is adjustable to meet the testing requirements of high-frequency vibration absorbers of different types of helicopters.

[0030] The reducer is connected to the overhead crane through lifting rings and elastic ropes, which improves stability during the test.

[0031] In other embodiments of this application, please refer to Figure 1-Figure 5 The present application provides a main reducer high-frequency vibration absorber performance test device, which includes a reducer bench assembly, a vibration excitation joint assembly, and a vibration exciter assembly.

[0032] The main reducer bench assembly is used to simulate the actual installation boundary conditions of the vibration absorber, and the vibration absorbers 16 are respectively installed on the four support rods.

[0033] The excitation joint assembly is used to connect the main reducer 1 and the excitation rod 7 and realize multi-directional excitation;

[0034] Vibrator assembly with adjustable excitation position.

[0035] Furthermore, the main reducer test bench assembly includes a reducer 1 and a suspension device, and the reducer is connected to a crane in a test plant through the suspension device.

[0036] Furthermore, the suspension device includes a connecting plate 17, a lifting ring 3, and a first elastic rope 4. The connecting plate 17 is a rectangular steel plate, and the four corners are connected to the top of the central shaft of the main reducer by bolts. The lifting ring 3 is installed at the center of the connecting plate 17.

[0037] Furthermore, the first elastic rope 4 is wound into a circle and fixed by three buckles, and its two ends are respectively connected to the lifting ring 3 and the test workshop hanging hook.

[0038] The present application provides a main reducer high-frequency vibration absorber performance test device, which has a simple structure and is easy to operate, and can achieve multi-angle and high-precision testing of the reducer vibration absorber performance.

[0039] The position of the vibration exciter is adjustable to meet the testing requirements of high-frequency vibration absorbers of different types of helicopters.

[0040] The reducer is connected to the overhead crane through lifting rings and elastic ropes, which improves stability during the test.

[0041] See also Figure 2 The excitation joint assembly provided in the present application includes a clamp 2, a connecting rod 5, and an adapter 6. The clamp 2 is composed of a left clamp part 21 and a right clamp part 22, and is clamped to the central axis of the reducer by bolts, and then connected to the adapter 6 by the connecting rod 5.

[0042] Furthermore, the connecting rod 5 has a protruding six-sided cube in the middle, which is convenient for installation of the connecting rod 5. There are threads at both ends of the connecting rod 5. After being connected to the right clamp part 22 and the adapter 6, the two ends are tightened by nuts.

[0043] See also Figure 3 The adapter 6 provided in the present application is a trapezoidal cube, and threaded holes perpendicular to the surfaces are respectively opened at the center positions of the front face 61, the side face 62, and the inclined face 63 of the adapter. All three holes are connected to the adapter 6. By changing the connection positions of the threaded holes of the adapter 6 and the connecting rod 5 and the exciting rod 7, excitation in four directions is achieved.

[0044] See also Figure 4 The exciting rod 7 provided in the present application includes an extension rod 71, a force sensor 72, a left clamping nut 73, an exciting force rod 74, and a right clamping nut 75. The two ends of the extension rod 71 are connected to the adapter 6 and the force sensor 72 through threads, and the two ends of the exciting force rod 74 are respectively covered with a left clamping nut 73 and a right clamping nut 74, which are respectively connected to the force sensor 72 and the exciter 8.

[0045] See also Figure 5The support platform provided in this application is provided with a suspension rod 10, a vertical guide rod 12, a longitudinal support plate 13, a transverse movable plate 14, and a support frame 15; the suspension rod 10 is installed in the groove of the longitudinal support plate 13 through four T-bolts 11, and the end of the suspension rod 10 is connected to the upper end of the exciter 8 through a second elastic rope 9.

[0046] The vertical guide rod 12 is installed in the threaded hole of the longitudinal support plate 13 and the groove of the transverse movable plate 14, and is fixed by two upper and lower nuts; the longitudinal support plate 14 is a rectangular plate with T-shaped grooves on both sides and four threaded holes in the middle; the transverse movable plate 14 is a rectangular plate with grooves on both long sides, and is installed on the upper and lower sides of the crossbeam of the support frame 15.

[0047] Furthermore, the bottom of the support stand 15 is fixed to the factory floor rails through anchor bolts and pressure blocks.

[0048] The present application provides a main reducer high-frequency vibration absorber performance test device, which has a simple structure and is easy to operate, and can achieve multi-angle and high-precision testing of the reducer vibration absorber performance.

[0049] The position of the exciter is adjustable to meet the test requirements of high-frequency vibration absorbers of different types of helicopters. The reducer is connected to the crane through a lifting ring and elastic rope to improve the stability during the test.

Claims

1. A main reducer high frequency vibration absorber performance test device, characterized in that: The device comprises a reducer stand assembly, a vibration excitation joint assembly, and a vibration exciter assembly; The main reducer bench assembly is used to simulate the actual installation boundary conditions of the vibration absorber, and the vibration absorbers (16) are respectively installed on the four support rods; An exciting joint assembly is used to connect the main reducer (1) and the exciting rod (7) and realize multi-directional excitation; Vibrator assembly with adjustable excitation position.

2. The device according to claim 1, characterized in that The main reducer bench assembly comprises a reducer (1) and a suspension device, and the reducer is connected to a crane in a test plant via the suspension device.

3. The device according to claim 2, characterized in that The suspension device comprises a connecting plate (17), a lifting ring (3), and an elastic rope (4); the connecting plate (17) is a rectangular steel plate, the four corners of which are connected to the top of the central shaft of the main reducer by bolts; and the lifting ring (3) is installed at the center of the connecting plate (17).

4. The device according to claim 3, characterized in that The elastic rope (4) is wound into a loop and fixed by three buckles, and its two ends are respectively connected to the lifting ring (3) and the test plant hanging hook.

5. The device according to claim 4, characterized in that The excitation joint assembly comprises a clamp (2), a connecting rod (5), and an adapter (6); the clamp (2) is composed of a left clamp part (21) and a right clamp part (22), and is clamped to the central axis of the reducer by bolts, and is then connected to the adapter (6) by the connecting rod (5).

6. The device according to claim 5, characterized in that The connecting rod (5) has a protruding six-sided cube in the middle, which is convenient for installing the connecting rod (5). Both ends of the connecting rod (5) are provided with threads. After being connected with the right clamp (22) and the adapter (6), the two ends are tightened by nuts.

7. The device according to claim 6, characterized in that The adapter (6) is a trapezoidal cube, and threaded holes perpendicular to the faces are respectively opened at the center of the front face (61), the side face (62), and the inclined face (63) of the adapter. The three holes are all connected to the adapter (6). By changing the connection position of the threaded holes of the adapter (6) and the connecting rod (5) and the exciting rod (7), excitation in four directions is achieved.

8. The device according to claim 7, characterized in that The exciting rod (7) comprises an extension rod (71), a force sensor (72), a left clamping nut (73), an exciting force rod (74), and a right clamping nut (75). The two ends of the extension rod (71) are connected to an adapter (6) and a force sensor (72) through threads, and the two ends of the exciting force rod (74) are respectively covered with a left clamping nut (73) and a right clamping nut (74), and are respectively connected to the force sensor (72) and the exciter (8).

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