Friction torque limiter impact load simulation test bench

Abstract

The invention discloses an impact load simulation test bench for a friction torque limiter, which belongs to the technical field of detection and comprises a base guide rail, an experimental device and a support are fixedly connected and mounted on the guide rail, an output end of a variable frequency motor is connected with a torque sensor through a coupler, and the other end of the torque sensor is connected with the friction torque limiter. The other end of the friction torque limiter is connected with the torque sensor, the other end of the torque sensor is connected with the eddy current brake, and the other end of the eddy current brake is connected with the electric hydraulic drum brake. According to the invention, the eddy current brake is used as a load to realize operation under different torques, and the electric hydraulic drum brake simulates different impact loads to carry out performance detection on the friction torque limiter in overload and impact states. In addition, the device supports friction torque limiters of different models, and can meet more experiment requirements.

Description

Technical Field

[0001] The invention relates to the technical field of friction torque limiter detection, in particular to an impact load simulation test bench for a friction torque limiter. Background Art

[0002] With the continuous development of industrial technology, the requirements for the performance of mechanical equipment are getting higher and higher. Friction torque limiter is an important transmission component, widely used in various mechanical equipment. Its main function is to limit the transmitted torque and prevent equipment damage caused by overload.

[0003] As an important component of the transmission system, the stability and reliability of the performance of the friction torque limiter directly affect the operation effect of the entire mechanical equipment. Therefore, in-depth research on the friction torque limiter and improving its ability to resist impact loads are important directions to meet the needs of industrial development.

[0004] Through the research on the impact load test bench, we can gain a deep understanding of the performance of the friction torque limiter under impact load, discover its existing problems and shortcomings, and then propose improvement measures and optimization plans to improve the performance of the friction torque limiter. Summary of the invention

[0005] The purpose of the present invention is to provide a friction torque limiter impact load simulation test bench, which solves the problem that the friction torque limiter is an important transmission element in various mechanical equipment, but there is currently no specific detection method for detecting the overload and impact performance of the friction torque limiter.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a friction torque limiter impact load simulation test bench, comprising a base, a guide rail, a guide sleeve, a support, a variable frequency motor, a frequency converter, a coupling, a torque sensor, a speed sensor, a bearing, an eddy current brake, and an electric hydraulic drum brake; characterized in that: the output shaft of the variable frequency motor is key-connected with the coupling, the other end of the coupling is connected to the first connecting shaft and the other end of the shaft is provided with a mounting flange, the mounting flange is fixedly connected to the torque sensor, and the other end of the torque sensor is fixedly connected to the first detection shaft through the mounting flange; on the other side of the test bench, one end of the eddy current brake is fixedly connected to the friction hub, the electric hydraulic drum brake is fixedly connected to the base, the other end of the friction hub is connected to the third connecting shaft, the other end of the eddy current brake is connected to the coupling, the coupling is fixedly connected to the second connecting shaft provided with the mounting flange, the mounting flange is fixedly connected to the torque sensor, and the other end of the torque sensor is fixedly connected to the second detection shaft through the mounting flange; different types of friction torque limiters are fixedly connected between the first detection shaft and the second detection shaft.

[0007] As a preferred embodiment of the present invention, a bearing is provided on the first detection shaft, a bearing is provided on the second detection shaft, the bearing is fixedly connected to the support, the support is fixedly connected to the sleeve, and a bearing is provided on the third connecting shaft, and the bearing is connected to the base.

[0008] As a preferred embodiment of the present invention, two permanent magnets are symmetrically fixed on the second connecting shaft, and a detection frame is arranged below the permanent magnet, and a speed sensor is arranged on the upper part of the detection frame. The speed sensor is connected to the host computer through a wire. When the permanent magnet on the shaft rotates and passes through the speed sensor, the speed sensor generates a signal, and the rotation speed of the shaft can be measured.

[0009] As a preferred embodiment of the present invention, the variable frequency motor is electrically connected to a frequency converter, and the frequency converter is used to control parameters such as start and stop, speed, and direction of the variable frequency motor.

[0010] As a preferred implementation manner of the present invention, the variable frequency motor, the torque sensor, and the eddy current brake are fixedly connected to different supports.

[0011] As a preferred embodiment of the present invention, the torque sensor has a metal elastomer inside and a strain gauge adhered to the surface. When the elastomer is subjected to torque, a slight deformation occurs, which in turn causes the resistance of the strain gauge to change. The torque sensor is connected to the controller through a wire, and the torque is calculated by measuring the resistance change.

[0012] As a preferred embodiment of the present invention, the different supports mentioned above are fixedly connected to the guide sleeve, the guide sleeve is slidably connected to the guide rail and a locking device is provided in the guide sleeve, the guide rail is fixedly connected to the base, and the guide sleeve is locked after the position of each device is determined to ensure the safety of the experimental process.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a fixed guide rail on the surface of the test bench, the guide rail and the guide sleeve are slidably connected, the guide sleeve is fixedly connected to different supports, the experimental device is fixedly connected to the support, a variable frequency motor is provided at one end of the test bench, the output shaft of the variable frequency motor is keyed to the coupling, the other end of the coupling is connected to the first connecting shaft and the other end of the shaft is provided with a mounting flange, the mounting flange is fixedly connected to the torque sensor, and the other end of the torque sensor is fixedly connected to the first detection shaft through the mounting flange; on the other side of the test bench, one end shaft of the eddy current brake is fixedly connected to the friction hub, the electric hydraulic drum brake is fixedly connected to the base, the other end of the friction hub is connected to the third connecting shaft, the other end of the eddy current brake is connected to the coupling, and the coupling is connected to the device A second connecting shaft with a mounting flange is fixedly connected, the mounting flange is fixedly connected to a torque sensor, and the other end of the torque sensor is fixedly connected to a second detection shaft through the mounting flange; different types of friction torque limiters are fixedly connected between the first detection shaft and the second detection shaft, the first detection shaft is driven to rotate at a rated speed by a variable frequency motor, and the second detection shaft is driven to rotate through the friction torque limiter transmission, and the torque is transmitted to the eddy current brake, and the braking resistance generated by the eddy current brake is used as the load to achieve the test torque required for the friction torque limiter test, and the impact loads in different states are simulated by an electric hydraulic drum brake. Through the detection of the torque sensor and the speed sensor, an impact load simulation measurement experiment of the friction torque limiter can be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 It is a schematic diagram of the main structure of the present invention.

[0016] In the figure: 1. base; 2. frequency conversion motor; 3. coupling; 4. torque sensor; 5. friction torque limiter; 6. torque sensor; 7. coupling; 8. eddy current brake; 9. friction hub; 10. electric hydraulic drum brake; 11. support; 12. guide sleeve; 13. guide rail; 14. detection frame; 15. frequency converter; 16. first connecting shaft; 17. mounting flange; 18. mounting flange; 19. bearing; 20. first detection shaft; 21. second detection shaft; 22. bearing; 23. mounting flange; 24. mounting flange; 25. second connecting shaft; 26. permanent magnet; 27. third connecting shaft; 28. bearing; 29. ​​speed sensor. DETAILED DESCRIPTION

[0017] The following will rely on the drawings in the embodiments of the present invention to elaborate on the technical concepts and solutions in the embodiments of the present invention. It should be clear that the embodiments shown are only part of the possible implementation methods of the present invention, and all embodiments. Based on these embodiments, any other embodiments derived by those skilled in the art without departing from the core idea of ​​the present invention and not through innovative means are deemed to be within the scope of protection of the present invention.

[0018] See also Figure 1 , Figure 2 The present invention provides a technical solution: a friction torque limiter impact load simulation test bench, comprising a base 1, a guide rail 13, a guide sleeve 12, a support 11, a variable frequency motor 2, a frequency converter 15, a coupling 3, a torque sensor 4, a speed sensor 29, a bearing, an eddy current brake 8, and an electric hydraulic drum brake 10; characterized in that: the output shaft of the variable frequency motor 2 is key-connected with the coupling 3, the other end of the coupling 3 is connected to the first connecting shaft 16 and the other end of the shaft is provided with a mounting flange 17, the mounting flange 17 is fixedly connected to the torque sensor 4, and the other end of the torque sensor 4 is fixedly connected to the first detection shaft 20 through the mounting flange 18; on the other side of the test bench, one end of the eddy current brake 8 is fixedly connected to the friction hub 9, the electric hydraulic drum brake 10 is fixedly connected to the base 1, and the friction hub 9 The other end is connected to the third connecting shaft 27, the other end of the eddy current brake 8 is connected to the coupling 7, the coupling 7 is fixedly connected to the second connecting shaft 25 provided with a mounting flange 24, the mounting flange 24 is fixedly connected to the torque sensor 6, and the other end of the torque sensor 6 is fixedly connected to the second detection shaft 21 through the mounting flange 23; different types of friction torque limiters 5 are fixedly connected between the first detection shaft 20 and the second detection shaft 21, and the first detection shaft 20 is driven to rotate at a rated speed by the frequency conversion motor 2, and the second detection shaft 21 is driven to rotate through the friction torque limiter 5, and the torque is transmitted to the eddy current brake 8, and the eddy current brake 8 is used as a load to realize operation under different torques, and the electric hydraulic drum brake 10 simulates different impact loads to perform performance detection on the friction torque limiter under overload and impact conditions.

[0019] Further improvement, as shown in the figure: a bearing 19 is provided on the first detection shaft 20, a bearing 22 is provided on the second detection shaft 21, the bearings 19, 22 are fixedly connected to the support 11, the support 11 is fixedly connected to the sleeve 12, and a bearing 28 is provided on the third connecting shaft 27, and the bearing 28 is connected to the base 1.

[0020] As a further improvement, two permanent magnets 26 are symmetrically fixed on the second connecting shaft 25, and a detection frame 14 is arranged below the permanent magnet 26, as shown in the figure: a speed sensor 29 is arranged on the upper part of the detection frame 14, and the speed sensor 29 is connected to the host computer through a wire. When the permanent magnet 26 on the shaft rotates past the speed sensor 29, the speed sensor generates a signal, and the shaft rotation speed can be measured.

[0021] As further improved, as shown in the figure: the variable frequency motor 2 is electrically connected to the frequency converter 15, and the frequency converter 15 is used to control the start, stop, speed, direction and other parameters of the variable frequency motor 2.

[0022] As further improved, as shown in the figure: the variable frequency motor 2, torque sensors 4, 6, and eddy current brake 8 are fixedly connected to different supports 11.

[0023] Further improvement, as shown in the figure: the torque sensor 4, 6 has a metal elastomer inside and a strain gauge adhered to the surface. When the elastomer is subjected to torque, a slight deformation occurs, which causes the resistance of the strain gauge to change. The torque sensor 4, 6 is connected to the controller through a wire, and the torque is calculated by measuring the resistance change.

[0024] Further improvement, as shown in the figure: the different supports 11 mentioned above are fixedly connected to the guide sleeve 12, the guide sleeve 12 is slidably connected to the guide rail 13 and a locking device is provided in the guide sleeve, the guide rail 13 is fixedly connected to the base 1, and the guide sleeve is locked after the position of each device is determined to ensure the safety of the experimental process.

[0025] Working principle: a fixed guide rail 13 is arranged on the surface of the test bench, the guide rail 13 and the guide sleeve 12 are slidably connected, the guide sleeve is fixedly connected to different supports 11, the experimental device is fixedly connected to the support 11, a variable frequency motor 2 is arranged at one end of the test bench, the output shaft of the variable frequency motor 2 is key-connected with the coupling 3, the other end of the coupling 3 is connected to the first connecting shaft 16 and the other end of the shaft is provided with a mounting flange 17, the mounting flange 17 is fixedly connected to the torque sensor 4, and the other end of the torque sensor 4 is fixedly connected to the first detection shaft 20 through the mounting flange 18; on the other side of the test bench, one end shaft of the eddy current brake 8 is fixedly connected to the friction hub 9, the electric hydraulic drum brake 10 is fixedly connected to the base 1, the other end of the friction hub 9 is connected to the third connecting shaft 27, the other end of the eddy current brake 8 is connected to the coupling 7, and the coupling The device 7 is fixedly connected to a second connecting shaft 25 provided with a mounting flange 24, and the mounting flange 24 is fixedly connected to a torque sensor 6, and the other end of the torque sensor 6 is fixedly connected to a second detection shaft 21 through a mounting flange 23; different types of friction torque limiters 5 are fixedly connected between the first detection shaft 20 and the second detection shaft 21, and the first detection shaft 20 is driven to rotate at a rated speed by the variable frequency motor 2, and the second detection shaft 21 is driven to rotate through the friction torque limiter 5, and the torque is transmitted to the eddy current brake 8, and the braking resistance generated by the eddy current brake 8 is used as the load to achieve the test torque required for the friction torque limiter 5 test, and the impact loads in different states are simulated by the electric hydraulic drum brake 10. Through the detection of the torque sensor 4 and the speed sensor 29, the impact load simulation measurement experiment of the friction torque limiter can be realized.

[0026] The specific description above further illustrates the purpose, technical solutions and beneficial effects of the invention in detail. It should be understood that the above is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A friction torque limiter impact load simulation test bench, comprising a base (1), a guide rail (13), a guide sleeve (12), a support (11), a variable frequency motor (2), a frequency converter (15), a coupling (3), a torque sensor (4), a speed sensor (29), bearings (19, 22, 28), an eddy current brake (8), and an electric hydraulic drum brake (10); characterized in that: The output shaft of the variable frequency motor (2) is key-connected to the coupling (3), the other end of the coupling (3) is connected to the first connecting shaft (16) and the other end of the shaft is provided with a mounting flange (17), the mounting flange (17) is fixedly connected to the torque sensor (4), and the other end of the torque sensor (4) is fixedly connected to the first detection shaft (20) via a mounting flange (18); on the other side of the test bench, one end of the eddy current brake (8) is fixedly connected to the friction wheel hub (9), and the electric hydraulic drum brake (10) is fixedly connected to the base (1). The other end of the friction hub (9) is connected to the third connecting shaft (27), the other end of the eddy current brake (8) is connected to the coupling (7), the coupling (7) is fixedly connected to the second connecting shaft (25) provided with a mounting flange (24), the mounting flange (24) is fixedly connected to the torque sensor (6), the other end of the torque sensor (6) is fixedly connected to the second detection shaft (21) via the mounting flange (23), and friction torque limiters (5) of different models are fixedly connected between the first detection shaft (20) and the second detection shaft (21).

2. The friction torque limiter impact load simulation test bench according to claim 1, characterized in that: A bearing (19) is arranged on the first detection shaft (20), a bearing (22) is arranged on the second detection shaft (21), the bearings (19, 22) are fixedly connected to the support (11), the support (11) is fixedly connected to the sliding sleeve (12), and a bearing (28) is arranged on the third connecting shaft (27), and the bearing (28) is connected to the base (1).

3. The friction torque limiter impact load simulation test bench according to claim 1, characterized in that: Two permanent magnets (26) are symmetrically fixed on the second connecting shaft (25), and a detection frame (14) is arranged below the permanent magnets (26). A speed sensor (29) is arranged on the upper part of the detection frame (14). The speed sensor (29) is connected to a host computer through a wire. When the permanent magnet (26) on the shaft rotates and passes through the speed sensor (29), the speed sensor generates a signal, and the rotation speed of the shaft is measured.

4. The friction torque limiter impact load simulation test bench according to claim 1, characterized in that: The variable frequency motor (2) is electrically connected to a frequency converter (15), and the frequency converter (15) is used to control parameters such as start and stop, speed, direction, etc. of the variable frequency motor (2).

5. The friction torque limiter impact load simulation test bench according to claim 1, characterized in that: The variable frequency motor (2), torque sensor (4, 6) and eddy current brake (8) are fixedly connected to different supports (11).

6. The friction torque limiter impact load simulation test bench according to claim 1, characterized in that: The torque sensor (4, 6) has a metal elastic body inside and a strain gauge adhered to the surface. When the elastic body is subjected to torque, a slight deformation occurs, which in turn causes a change in resistance of the strain gauge. The torque sensor (4, 6) is connected to a controller via a wire, and the magnitude of the torque is calculated by measuring the change in resistance.

7. The friction torque limiter impact load simulation test bench according to claim 1, characterized in that: The different supports (11) described above are fixedly connected to the guide sleeve (12), the guide sleeve (12) is slidably connected to the guide rail (13) and a locking device is provided in the guide sleeve, the guide rail (13) is fixedly connected to the base (1), and the guide sleeve is locked after the position of each device is determined to ensure the safety of the experimental process.

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