Vibration test bench for torque compensation device simulating turboprop engine working load

Abstract

The present invention relates to the technical field of equivalent load dynamic loading devices, and specifically to a vibration test bench for a torque compensation device that simulates the working load of a turboprop engine, including a test bench and a basic vibration mechanism, a torque mechanism and an eccentric load mechanism located on the test bench, the basic vibration mechanism including a mounting frame flexibly connected to the test bench and used to install the torque compensation device and a vibration servo drive device located on the inner side of the mounting frame, a vibration test unit is provided between the mounting frame and the vibration servo drive device, the torque mechanism includes a support seat and a torque rod located on the support seat, the torque rod is connected to the oil cylinder of the torque compensation device and a torque servo drive device is connected to the torque rod, the eccentric load mechanism includes an eccentric load shell connected to the support seat and an eccentric load servo drive device located in the eccentric load shell, and the eccentric load shell includes a multifunctional locking unit. The scheme of the present invention can be used to simulate the basic vibration, torque and eccentric load conditions of an aircraft engine during operation.

Description

Technical Field

[0001] The invention relates to the technical field of equivalent load dynamic loading devices, and specifically provides a vibration test bench for a torque compensation device which is specially used for simulating the working load of a turboprop engine. Background Art

[0002] When the aircraft engine is started or stopped, the propeller, fan and other devices will generate a large torque load. If this torque load is not suppressed or balanced, it will cause a large torsional deformation of the engine structure, resulting in tearing and damage of the vibration isolator installed between the engine and the engine mounting frame. In order to prevent damage to the vibration isolator and other components, a hydraulic torque compensation device needs to be installed between the engine and the engine mounting frame to protect the vibration isolation equipment and ensure the performance of the aircraft.

[0003] The torque compensation device is usually composed of two left and right cylinders and an accumulator on the top. The upper chamber of the left cylinder and the lower chamber of the right cylinder are filled with hydraulic oil. When the connected engine and other structures produce up and down or pitching movements, the actuators at both ends act in the same direction, connected through the upper chamber of the left cylinder and the lower chamber of the right cylinder, the total volume remains unchanged, the pressure of the hydraulic system remains unchanged, and the pressure inside the hydraulic system is self-balanced; when the structure produces torsional movement, the actuators at both ends act in different directions, the total volume of the cylinder changes, the pressure inside the hydraulic system changes, the oil enters the accumulator through the regulating device, and the spring piston device in the accumulator compensates for the system pressure, and only produces compensation for torque load.

[0004] In order to ensure the performance of the torque compensation device, it is necessary to provide a test that simulates the real situation of the aircraft engine in a complex working environment based on the operating principle of the torque compensation device and the requirements of the test. If a real engine is used for the test, the test cost will be too high. Therefore, it is necessary to design a vibration test bench that can simulate the working load of the turboprop engine specially used for the torque compensation device, so that it can simulate the basic vibration, torque and eccentric load generation and transmission of the aircraft engine operation, and can coordinate and act on the torque compensation device with these three loads. Summary of the invention

[0005] In order to solve the above-mentioned problems, the present invention provides a vibration test bench for a torque compensation device that simulates the working load of a turboprop engine. The test bench can simulate the basic vibration, torque and eccentric load generation and transmission of the operation of an aircraft engine, and can also coordinate and act on the torque compensation device under the three working conditions of vibration, torque and eccentric load, thereby reducing the cost of the torque compensation device test and evaluating the performance of the torque compensation device at the same time.

[0006] The present invention provides a vibration test bench for simulating the working load of a turboprop engine specifically for a torque compensation device, which specifically comprises a test bench and a basic vibration mechanism, a torque mechanism and an eccentric load mechanism located on the test bench; the basic vibration mechanism comprises a mounting frame flexibly connected to the test bench and used to mount the torque compensation device, and a vibration servo drive device located on the inner side of the mounting frame, a vibration test unit is provided between the mounting frame and the vibration servo drive device; the torque mechanism comprises a support seat and a torque rod located on the support seat, the torque rod is connected to the oil cylinder of the torque compensation device and the torque servo drive device is connected to the torque rod; the eccentric load mechanism comprises an eccentric load shell connected to the support seat and an eccentric load servo drive device located in the eccentric load shell, the eccentric load servo drive device drives the eccentric load shell and the support seat to move to perform an eccentric load test on the torque compensation device; the eccentric load shell comprises a locking unit.

[0007] Furthermore, the vibration test unit includes an eccentric wheel and an inner frame connected to the eccentric wheel, the outer end of the inner frame is hinged with an outer frame at an angle, and the outer frame is provided with an angle adjustment drive for adjusting the angle between the inner frame and the outer frame; the outer frame is connected to the mounting frame, and the inner frame is connected to a universal coupling located on the outside of the eccentric wheel and capable of driving the eccentric wheel to rotate, and the end of the universal coupling away from the eccentric wheel is connected to the vibration servo drive device.

[0008] Furthermore, the test bench includes an upper support, and the mounting frame is flexibly connected to the upper support through a spring unit and a ball joint unit; the spring unit includes a bottom spring respectively connected between the lower ends of both sides of the mounting frame and the test bench; the ball joint unit includes side ball joints respectively located between the two side ends of the mounting frame and the inner end surface of the upper support.

[0009] Furthermore, the torque rod includes a torque input rod and a torque output rod, the torque input rod and the torque output rod are connected by a connecting rod, and the torque input rod, the torque output rod and the connecting rod are an integrated structure; both ends of the torque output rod are connected to the oil cylinder of the torque compensation device.

[0010] Furthermore, an input end seat body and an output end seat body are provided on the support seat, and torque transmission bearings are provided in the input end seat body and the output end seat body. The connecting rod is located on one side of the torque input rod and supported in the input end seat body, and the connecting rod is located on one side of the torque output rod and supported in the output end seat body. The torque transmission bearings are respectively located between the connecting rod and the input end seat body and between the connecting rod and the output end seat body.

[0011] Furthermore, the two side ends of the torque output rod are connected to the oil cylinder push rod of the torque compensation device through the torque push rod; an eccentric load gap is left between the torque push rod and the oil cylinder push rod, and a flexible filling gasket is provided in the eccentric load gap.

[0012] Furthermore, the torque servo drive device is connected to one side end of the torque input rod away from the connecting rod; a through groove is opened on the test bench, and the support seat is an "I-shaped" structure as a whole. The support seat specifically includes an upper end seat, a lower end seat and a middle seat vertically connected between the upper end seat and the lower end seat; the middle seat is accommodated in the through groove, the upper end seat and the lower end seat are respectively located at the upper and lower ends of the test bench, and the lower end seat is connected to the eccentric load shell.

[0013] Furthermore, the test bench includes a lower support, an eccentric load servo drive device is arranged on the lower support, an eccentric load shell is slidably arranged on the lower support and driven to slide horizontally by the eccentric load servo drive device; and a locking unit is arranged between the eccentric load shell and the lower support.

[0014] Furthermore, the locking unit includes a locking shell located at the lower end of the eccentric load shell and a locking push rod located in the locking shell, and a locking spring located at the upper end of the locking push rod is also provided in the locking shell; a locking hole is provided on the locking push rod, and an upper locking rod and a lower locking rod are movably provided on the locking shell; when the eccentric load servo drive device drives the eccentric load shell to move for the eccentric load test, the locking unit is in a natural state, and the upper locking rod and the lower locking rod are separated from the locking hole; when the eccentric load effect needs to be evaluated, the lower locking rod is placed in the locking hole so that the eccentric load shell cannot move forward and backward to realize the locking function; when the evaluation is completed, the lower locking rod is withdrawn from the locking hole, and the upper locking rod is placed in the locking hole to allow the eccentric load shell to return and reset.

[0015] Furthermore, a thorn-shaped protrusion slide rail is provided on the lower support, and the lower end of the locking push rod includes a triangular sliding block matched with the thorn-shaped protrusion slide rail; the eccentric load shell moves unidirectionally on the thorn-shaped protrusion slide rail toward the side away from the eccentric load servo drive device through the cooperation of the triangular sliding block and the eccentric load servo drive device to perform an eccentric load test.

[0016] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0017] 1. The present invention can realize a simulated vibration test of a torque compensation device in an aircraft engine during flight through a basic vibration mechanism. The angle between the inner frame and the outer frame of the eccentric wheel is adjusted by a servo motor, and the eccentric wheel is driven to rotate by the servo motor, thereby changing the axial direction of the eccentric wheel and generating a centrifugal impact to drive the torque compensation device to vibrate, thereby simulating the basic vibration of the aircraft engine under flight conditions.

[0018] 2. The present invention can simulate the torque working condition of the torque compensation device in the aircraft engine through the torque mechanism, and transmit the torque to the oil cylinder through the vertical electric cylinder to provide torque for the torque compensation device. At the same time, the present invention can simulate the eccentric load working condition of the torque compensation device in the aircraft engine through the eccentric load mechanism, and push the eccentric load housing through the horizontal servo electric cylinder, and further push the eccentric load mechanism as a whole to move horizontally, so as to provide eccentric load for the torque compensation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The overall structure of the simulation test platform provided by the embodiment of the present invention is shown in FIG. Figure 1 ;

[0020] Figure 2 The overall structure of the simulation test platform provided by the embodiment of the present invention is shown in FIG. Figure 2 ;

[0021] Figure 3 is a structural schematic diagram of a basic vibration mechanism in a simulation test platform provided according to an embodiment of the present invention;

[0022] Figure 4 is a schematic structural diagram of an inner frame in a basic vibration mechanism provided according to an embodiment of the present invention;

[0023] Figure 5 is a schematic diagram of a partial structure of a torque mechanism in a simulation test platform provided according to an embodiment of the present invention;

[0024] Figure 6 is a schematic diagram of the overall structure of a test bench in a simulation test platform provided according to an embodiment of the present invention;

[0025] Figure 7 is a schematic diagram of a partial structure of an eccentrically loaded housing in a simulation test platform provided according to an embodiment of the present invention;

[0026] Figure 8 is a schematic cross-sectional structural diagram of an eccentric load mechanism in a simulation test platform provided according to an embodiment of the present invention;

[0027] Fig. 9 is a schematic structural diagram of an eccentric load housing in an eccentric load mechanism provided according to an embodiment of the present invention;

[0028] Fig.10 is a schematic diagram of an implementation of eccentric loading according to an embodiment of the present invention;

[0029] Fig.11 is a schematic structural diagram of a locking push rod provided according to an embodiment of the present invention.

[0030] The accompanying drawings include: test bench 1, basic vibration mechanism 2, torque mechanism 3, eccentric load mechanism 4, mounting frame 5, vibration servo drive device 6, support seat 7, torque servo drive device 8, eccentric load housing 9, eccentric load servo drive device 10, eccentric wheel 11, inner frame 12, outer frame 13, angle adjustment drive member 14, universal coupling 15, upper support 16, bottom spring 17, side ball joint 18, torque input rod 19, torque output rod 20, input end seat body 21, output end seat body 22, torque push rod 23, eccentric load gap 24, upper end seat 25, lower End seat 26, middle seat 27, lower support 28, locking shell 29, locking push rod 30, locking hole 31, upper locking rod 32, lower locking rod 33, thorn-shaped protrusion slide rail 34, triangular sliding block 35, cylinder 36, cylinder push rod 37, accumulator 38, locking unit 39, U-shaped frame 40, straight frame 41, connecting hole 42, connecting pin 43, connecting rod 44, through groove 45, convex guide rail 46, accommodating platform 47, roller 48, accommodating chamber 49, locking ear 50, accommodating hole one 51, accommodating hole two 52, locking spring 53, connecting platform 54. DETAILED DESCRIPTION

[0031] In the following, reference will be made to the Figure 1-11 Embodiments of the present invention are described. In the following description, the same modules are represented by the same reference numerals. In the case of the same reference numerals, their names and functions are also the same. Therefore, the detailed description thereof will not be repeated.

[0032] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the following Figure 1-11 It should be understood that the specific embodiments described herein are only used to explain the present invention and do not constitute a limitation of the present invention.

[0033] The torque compensation device is specially designed for the vibration test bench simulating the working load of the turboprop engine, such as Figure 1 As shown, the test bench 1 includes a basic vibration mechanism 2, a torque mechanism 3 and an eccentric load mechanism 4 located on the test bench 1. The test bench 1 is both an integral frame and a medium connecting the basic vibration mechanism 2, the torque mechanism 3 and the eccentric load mechanism 4. During the test, the test bench 1 is required to apply basic vibration, torque and eccentric load to the torque compensation device. The torque compensation device includes Figure 1 The left and right oil cylinders 36 shown in the figure and the accumulator 38 located above the middle of the two oil cylinders 36, the oil cylinder 36 includes Fig.10 The oil cylinder push rod 37 shown in FIG.

[0034] like Figure 1-Figure 3As shown, the basic vibration mechanism 2 includes a mounting frame 5 flexibly connected to the test bench 1 and used to install the torque compensation device, and a vibration servo drive device 6 located on the inner side of the mounting frame 5. The vibration servo drive device 6 is a servo motor. The torque compensation device is installed on the mounting frame 5. A vibration test unit is provided between the mounting frame 5 and the vibration servo drive device 6. The vibration test unit includes an eccentric wheel 11 and an inner frame 12 connected to the eccentric wheel 11. The outer end of the inner frame 12 is hinged with an outer frame 13 at an angle. The outer frame 13 is provided with an angle adjustment drive member 14 for adjusting the angle between the inner frame 12 and the outer frame 13. The angle adjustment drive member 14 is a servo motor. The inner frame 12 and the outer frame 13 are hinged to form a rotating pair. The rotation angle between the inner frame 12 and the outer frame 13 is controlled by the servo motor.

[0035] like Figure 4 As shown, the inner frame 12 includes a U-shaped frame 40 and a straight frame 41 connected to the inner end of the U-shaped frame 40. A connecting pin 43 is also provided at the outer end of the U-shaped frame 40. The connecting pin 43 is arranged close to the straight frame 41. A through hole is opened on the outer frame 13. The connecting pin 43 is inserted into the through hole of the outer frame 13. The power output end of the servo motor is connected to the connecting pin 43 of the inner frame 12 on the outside of the outer frame 13. The servo motor can control the movement of the inner frame 12 by driving the connecting pin 43 to rotate, thereby adjusting the angle between the inner frame 12 and the outer frame 13.

[0036] A universal coupling 15 is provided on the inner frame 12, which is located on the outside of the eccentric wheel 11 and can drive the eccentric wheel 11 to rotate. The end of the universal coupling 15 away from the eccentric wheel 11 is connected to the vibration servo drive device 6. A connecting hole 42 is matched in the middle of the U-shaped frame 40 and the straight frame 41. A connecting shaft is provided in the connecting hole 42 and extends to the outside of the inner frame 12. The universal coupling 15 is connected between the connecting shaft and the vibration servo drive device 6. The universal coupling 15 is a cross universal coupling 15, which transmits the power of the vibration servo drive device 6 to the eccentric wheel 11 through the universal coupling 15 and drives the eccentric wheel 11 to rotate.

[0037] The outer frame 13 is connected to the mounting frame 5, and the inner frame 12 is in contact with the eccentric wheel 11 through the shaft. During the rotation of the eccentric wheel 11, a centrifugal impact will be generated, which will drive the inner frame 12 and the outer frame 13 to vibrate and further act on the mounting frame 5, and be transmitted to the torque compensation device installed on the mounting frame 5, thereby causing the torque compensation device to vibrate. The vibration mode of the eccentric wheel 11 in this embodiment is different from that of the existing eccentric wheel 11. When the eccentric wheel 11 in this embodiment rotates, the direction of the eccentric wheel shaft can be changed by adjusting the angle between the inner frame 12 and the outer frame 13, thereby changing the rotation angle of the eccentric wheel 11, thereby changing the axial direction of the eccentric wheel 11, and impacts in different angles and directions can be achieved, and transmitted to the torque compensation device to induce vibration, thereby achieving multi-directional vibration.

[0038] like Figure 1 , Figure 2 As shown, the test bench 1 includes an upper support 16, and the mounting frame 5 is flexibly connected to the upper support 16 through a spring unit and a ball joint unit. The spring unit includes a bottom spring 17 connected between the lower ends of both sides of the mounting frame 5 and the test bench 1. The bottom spring 17 is flexible and flexible as an elastic element. While achieving the target constraint, it can also make the mounting frame 5 and the torque compensation device more easily vibrate under the impact of the rotation of the eccentric wheel 11, thereby meeting the basic vibration requirements of the simulated engine operation. The ball joint unit includes a side ball joint 18 located between the two side ends of the mounting frame 5 and the inner end surface of the upper support 16. The side ball joint 18 forms a surface contact with the upper support 16, which can realize the constraint of the basic vibration mechanism 2 and facilitate the vibration of the torque compensation device under the centrifugal impact of the eccentric wheel 11.

[0039] like Figure 1 , Figure 2 , Figure 5 As shown, the torque mechanism 3 includes a support seat 7 and a torque rod located on the support seat 7, the torque rod is connected to the oil cylinder 36 of the torque compensation device, the torque rod is connected to a torque servo drive device 8, the torque servo drive device 8 is a vertical electric cylinder, the torque rod includes a torque input rod 19 and a torque output rod 20, the torque input rod 19 is a single-sided rod structure, the torque output rod 20 is a double-sided rod structure, the torque input rod 19 and the torque output rod 20 are connected by a connecting rod 44, the torque input rod 19, the torque output rod 20 and the connecting rod 44 are an integrated structure, which can directly transmit torque, so that the torque at the torque input end is consistent with the torque output end, while avoiding the complexity of the mechanism and reducing the loss of torque during the transmission process.

[0040] Both ends of the torque output rod 20 are connected to the oil cylinder 36 of the torque compensation device, and an input end seat body 21 and an output end seat body 22 are provided on the support seat 7. Torque transmission bearings are provided in the input end seat body 21 and the output end seat body 22. The connecting rod 44 is located on one side of the torque input rod 19 and is supported in the input end seat body 21. The connecting rod 44 is located on one side of the torque output rod 20 and is supported in the output end seat body 22. The torque transmission bearings are respectively located between the connecting rod 44 and the input end seat body 21 and between the connecting rod 44 and the output end seat body 22. After the vertical electric cylinder is started, the electric rod of the vertical electric cylinder pushes the torque input rod 19 to move and generate torque. The power is transmitted through the torque transmission bearing to form a rotating pair, thereby realizing the transmission of torque from the torque input rod 19 to the torque output rod 20 and then to the torque compensation device.

[0041] The two side ends of the torque output rod 20 are connected to the cylinder push rod 37 of the oil cylinder 36 in the torque compensation device through the torque push rod 23. Fig.10 As shown, an eccentric load gap 24 is left between the torque push rod 23 and the cylinder push rod 37, and a flexible filling gasket is provided in the eccentric load gap 24, which is a rubber gasket. The cylinder push rod 37 and the torque push rod 23 are hinged through an axis and a hole. During design and processing, a certain gap should be left between the axis and the hole, that is, the eccentric load gap 24 here, otherwise the mechanism will be stuck when the eccentric load is realized. During installation, a layer of rubber gasket is added and placed between the gap between the cylinder push rod 37 and the torque push rod 23 to fill the gap. When the torque output rod 20 moves outward, one end of the connecting hole of the torque push rod 23 is pressed on the rubber gasket, which can meet the inclination at a certain angle, thereby meeting the requirements of the following eccentric load conditions, and will not affect the output and transmission of the torque of the torque mechanism 3.

[0042] like Figure 5 , Figure 6 As shown, the vertical electric cylinder is connected to one side end of the torque input rod 19 away from the connecting rod 44, a through groove 45 is opened on the test bench 1, and the support seat 7 is an "I-shaped" structure as a whole. The support seat 7 specifically includes an upper end seat 25, a lower end seat 26 and a middle seat 27 vertically connected between the upper end seat 25 and the lower end seat 26. The middle seat 27 is accommodated in the through groove 45. The upper end seat 25 is located at the upper end of the test bench 1, and the upper end seat 25 mainly provides support for the torque input rod 19 and the torque output rod 20.

[0043] The eccentric load mechanism 4 includes an eccentric load shell 9 connected to the support seat 7 and an eccentric load servo drive device 10 located in the eccentric load shell 9. The eccentric load servo drive device 10 is a horizontal servo electric cylinder. The eccentric load servo drive device 10 drives the eccentric load shell 9 and the support seat 7 to move to perform an eccentric load test on the torque compensation device. The lower end seat 26 is located at the lower end of the test bench 1. The lower end seat 26 is fixedly connected to the eccentric load shell 9 by screws. The middle seat 27 is located in the through groove 45 to realize the constraint of 5 degrees of freedom. There is a horizontal moving pair in one direction. The support seat 7 can move horizontally in one degree of freedom direction along with the eccentric load shell 9.

[0044] like Figure 6 , Figure 7 , Fig. 9 As shown, the test bench 1 includes a lower support 28, a receiving platform 47 is provided on the lower support 28, an eccentric load servo drive device 10 is provided on the lower support 28 and is located in the receiving platform 47, a thorn-shaped protrusion slide rail 34 is provided on the lower support 28 at the front side of the receiving platform 47, and convex guide rails 46 are provided on both sides of the lower support 28 below the thorn-shaped protrusion slide rail 34, an eccentric load housing 9 is slidably provided on the lower support 28 and driven by the eccentric load servo drive device 10 to slide horizontally, and the eccentric load housing 9 The lower ends of both sides are provided with rollers 48 matching with the convex guide rails 46, and the rollers 48 have grooves in the middle. The eccentric housing 9 slides horizontally on the lower support 28 through the rollers 48 and the convex guide rails 46. The eccentric housing 9 can be prevented from deviating from the track during horizontal movement through the concave-convex combination of the rollers 48 and the convex guide rails 46. A layer of rubber is provided in the middle groove of the rollers 48 to reduce the phenomenon of excessive deviation caused by the slipping of the eccentric housing 9 during operation. At the same time, the upper end of the eccentric housing 9 also includes a connecting platform 54, and the eccentric housing 9 is fixedly connected to the lower end seat 26 of the support seat 7 through the connecting platform 54.

[0045] like Figure 5-Figure 8 , Fig.11 As shown, the eccentric load shell 9 includes a locking unit 39, and the locking unit 39 is arranged between the eccentric load shell 9 and the lower support 28. Specifically, the locking unit 39 is arranged between the eccentric load shell 9 and the thorn-shaped protrusion slide rail 34 on the lower support 28. The locking unit 39 includes a locking shell 29 located at the lower end of the eccentric load shell 9 and a locking push rod 30 located in the locking shell 29. The locking shell 29 includes a accommodating chamber 49. The locking push rod 30 is placed in the accommodating chamber 49. The accommodating chamber 49 is provided with a locking spring 53 located at the upper end of the locking push rod 30. The locking shell 29 is also provided with a locking ear 50. The locking ear 50 and the locking shell 29 are respectively provided with a accommodating hole 1 51 and an accommodating hole 2 52 that match each other. The accommodating hole 1 51 and the accommodating hole 2 52 include an upper group and a lower group.

[0046] The lower end of the locking push rod 30 includes a triangular sliding block 35 matched with the thorn-shaped protrusion slide rail 34, and the locking spring 53 is located at the end of the locking push rod 30 away from the triangular sliding block 35. The eccentric load housing 9 moves unidirectionally toward the side away from the eccentric load servo drive device 10 on the thorn-shaped protrusion slide rail 34 through the triangular sliding block 35 and the thorn-shaped protrusion slide rail 34 to perform the eccentric load test. The locking push rod 30 is provided with a locking hole 31, and the locking hole 31 is a threaded hole structure. The locking housing 29 is movably provided with an upper locking rod 32 and a lower locking rod 33, and the upper locking rod 32 and the lower locking rod 33 are both threaded rod structures. The upper locking rod 32 and the lower locking rod 33 are respectively arranged in the upper and lower two groups of receiving holes 1 51 and receiving holes 2 52, and can be threadedly locked in the locking hole 31.

[0047] When the eccentric load servo drive device 10 drives the eccentric load shell 9 to move for the eccentric load test, the elastic force of the locking spring 53 pushes the locking push rod 30 downward, the locking unit 39 is in a natural state, and the upper locking rod 32 and the lower locking rod 33 are both separated from the locking hole 31. At this time, the triangular sliding block 35 engages with the thorn-shaped protrusion slide rail 34 to achieve forward movement in the natural state.

[0048] When the eccentric load servo drive device 10 drives the eccentric load shell 9 to move to a certain distance, it is necessary to stop locking the eccentric load shell 9 to evaluate the eccentric load effect. At this time, the horizontal servo electric cylinder is closed and the lower locking rod 33 is placed in the locking hole 31, so that the eccentric load shell 9 cannot move forward and backward to realize the locking function.

[0049] When the eccentric load effect is evaluated, the lower locking rod 33 is withdrawn from the locking hole 31, and the upper locking rod 32 is placed in the locking hole 31, and the horizontal servo electric cylinder is opened to drive the eccentric load housing 9 to return and reset. On the basis of realizing eccentric load, this part adds a fixing and reverse stroke mode of the eccentric load housing 9 and the torque rod as a whole, which is conducive to the smooth transmission of torque.

[0050] When in use, the angle adjustment drive 14, i.e., the servo motor, is started, and the servo motor adjusts the angle between the inner frame 12 and the outer frame 13 to the angle required for the current working condition, and the vibration servo drive device 6, i.e., the servo motor, is started. The servo motor drives the eccentric wheel 11 to rotate via the universal joint 15, and then the inner frame 12, the outer frame 13, and the mounting frame 5 transmit the force to the torque compensation device to drive the torque compensation device to vibrate, thereby simulating the vibration simulation in the flight condition of the aircraft engine.

[0051] Start the torque servo drive device 8, i.e. the vertical electric cylinder. The electric rod of the vertical electric cylinder pushes the torque input rod 19 to move and generate torque, and the torque input rod 19 transmits the torque to the torque output rod 20, and then the torque push rod 23 transmits the torque to the oil cylinder 36 of the torque compensation device.

[0052] Start the eccentric load servo drive device 10, i.e., the horizontal servo electric cylinder, which pushes the eccentric load housing 9 to move horizontally. At this time, the support seat 7 moves with the eccentric load housing 9, and the torque rod slowly moves to the Figure 1 The F direction deviates, and the torque push rod 23 at the torque output end and the cylinder push rod 37 deviate at a certain angle at a specific connection point, thereby forming an eccentric load.

[0053] The generation and transmission of torque and eccentric load are achieved through the cooperation of the vertical electric cylinder and the horizontal servo electric cylinder.

[0054] Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. Those skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

[0055] The above specific implementations of the present invention do not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A vibration test bench for simulating the working load of a turboprop engine, which is specially designed for torque compensation device, characterized in that: The invention comprises a test bench (1) and a basic vibration mechanism (2), a torque mechanism (3) and an eccentric load mechanism (4) located on the test bench (1); the basic vibration mechanism (2) comprises a mounting frame (5) flexibly connected to the test bench (1) and used for mounting a torque compensation device, and a vibration servo drive device (6) located inside the mounting frame (5); a vibration test unit is provided between the mounting frame (5) and the vibration servo drive device (6); the torque mechanism (3) comprises a support seat (7) and a torque rod located on the support seat (7); the torque rod is connected to an oil cylinder (36) of the torque compensation device and a torque servo drive device (8) is connected to the torque rod; the eccentric load mechanism (4) comprises an eccentric load housing (9) connected to the support seat (7) and an eccentric load servo drive device (10) located inside the eccentric load housing (9); the eccentric load servo drive device (10) drives the eccentric load housing (9) and the support seat (7) to move so as to perform an eccentric load test on the torque compensation device; the eccentric load housing (9) comprises a locking unit (39).

2. The vibration test bench for simulating turboprop engine working loads specially used for torque compensation device according to claim 1 is characterized in that: The vibration test unit comprises an eccentric wheel (11) and an inner frame (12) connected to the eccentric wheel (11); an outer frame (13) is hingedly connected to the outer end of the inner frame (12) at an angle; an angle adjustment driving member (14) is provided on the outer frame (13) for adjusting the angle between the inner frame (12) and the outer frame (13); the outer frame (13) is connected to a mounting frame (5); a universal coupling (15) is connected to the inner frame (12) and is located outside the eccentric wheel (11) and can drive the eccentric wheel (11) to rotate; and an end of the universal coupling (15) away from the eccentric wheel (11) is connected to a vibration servo driving device (6).

3. The vibration test bench for simulating turboprop engine working load for torque compensation device according to claim 2 is characterized in that: The test bench (1) comprises an upper support (16), and the mounting frame (5) is flexibly connected to the upper support (16) via a spring unit and a ball joint unit; the spring unit comprises a bottom spring (17) respectively connected between the lower ends of both sides of the mounting frame (5) and the test bench (1); the ball joint unit comprises a side ball joint (18) respectively located between the two side ends of the mounting frame (5) and the inner end surface of the upper support (16).

4. The vibration test bench for simulating turboprop engine working load specially used for torque compensation device according to claim 3 is characterized in that: The torque rod comprises a torque input rod (19) and a torque output rod (20); the torque input rod (19) and the torque output rod (20) are connected via a connecting rod (44); the torque input rod (19), the torque output rod (20) and the connecting rod (44) are an integrated structure; and both ends of the torque output rod (20) are connected to an oil cylinder (36) of a torque compensation device.

5. The vibration test bench for simulating turboprop engine working load specially used for torque compensation device according to claim 4 is characterized in that: An input end seat body (21) and an output end seat body (22) are provided on the support seat (7), and torque transmission bearings are provided in the input end seat body (21) and the output end seat body (22). The connecting rod (44) is located on one side of the torque input rod (19) and supported in the input end seat body (21), and the connecting rod (44) is located on one side of the torque output rod (20) and supported in the output end seat body (22), and the torque transmission bearings are respectively located between the connecting rod (44) and the input end seat body (21) and between the connecting rod (44) and the output end seat body (22).

6. The vibration test bench for simulating turboprop engine working loads specially used for torque compensation device according to claim 5 is characterized in that: The two side ends of the torque output rod (20) are connected to the oil cylinder push rod (37) of the torque compensation device via the torque push rod (23); an eccentric load gap (24) is left between the torque push rod (23) and the oil cylinder push rod (37), and a flexible filling gasket is provided in the eccentric load gap (24).

7. The vibration test bench for simulating turboprop engine working loads specially used for torque compensation device according to claim 6 is characterized in that: The torque servo drive device (8) is connected to a side end of the torque input rod (19) away from the connecting rod (44); a through slot (45) is provided on the test bench (1); the support seat (7) is in an "I-shaped" structure as a whole; the support seat (7) specifically comprises an upper end seat (25), a lower end seat (26) and a middle seat (27) vertically connected between the upper end seat (25) and the lower end seat (26); the middle seat (27) is accommodated in the through slot (45); the upper end seat (25) and the lower end seat (26) are respectively located at the upper end and the lower end of the test bench (1); and the lower end seat (26) is connected to the eccentric load housing (9).

8. A vibration test bench for simulating turboprop engine working loads specially used for torque compensation device according to any one of claims 1 to 7, characterized in that: The test bench (1) comprises a lower support (28), the eccentric load servo drive device (10) is arranged on the lower support (28), the eccentric load housing (9) is slidably arranged on the lower support (28) and driven to slide horizontally by the eccentric load servo drive device (10); the locking unit (39) is arranged between the eccentric load housing (9) and the lower support (28).

9. The vibration test bench for simulating turboprop engine working loads specially used for torque compensation device according to claim 8 is characterized in that: The locking unit (39) comprises a locking shell (29) located at the lower end of the eccentric load housing (9) and a locking push rod (30) located in the locking shell (29), and a locking spring (53) is also provided in the locking shell (29) and located at the upper end of the locking push rod (30); a locking hole (31) is provided on the locking push rod (30), and an upper locking rod (32) and a lower locking rod (33) are movably provided on the locking shell (29); when the eccentric load servo drive device (10) drives the eccentric load housing (9) to move, When the eccentric load test is carried out, the locking unit (39) is in a natural state, and the upper locking rod (32) and the lower locking rod (33) are both separated from the locking hole (31); when the eccentric load effect needs to be evaluated, the lower locking rod (33) is placed in the locking hole (31) so that the eccentric load housing (9) cannot move forward or backward to achieve the locking function; when the evaluation is completed, the lower locking rod (33) is withdrawn from the locking hole (31), and the upper locking rod (32) is placed in the locking hole (31) so that the eccentric load housing (9) returns to its original position.

10. The vibration test bench for simulating turboprop engine working load specially used for torque compensation device according to claim 9, characterized in that: The lower support (28) is provided with a thorn-shaped protrusion slide rail (34), and the lower end of the locking push rod (30) includes a triangular sliding block (35) matched with the thorn-shaped protrusion slide rail (34); the eccentric load housing (9) moves unidirectionally on the thorn-shaped protrusion slide rail (34) toward a side away from the eccentric load servo drive device (10) through the cooperation of the triangular sliding block (35) and the thorn-shaped protrusion slide rail (34) to perform an eccentric load test.

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