Viscoelastomer pressure and rate related sliding friction performance test system

Abstract

The invention discloses a viscoelastic body pressure and rate related sliding friction performance test system. The system comprises a rack main body for providing stable support and protecting an internal mechanism; the pressure regulation and control module is used for realizing stable pressurization of the sample and independent regulation and control of pressure; the rate driving module is used for providing a controllable relative sliding rate; the sample clamping module is used for fixing the sample and avoiding clamping damage and sliding deviation; the multi-parameter acquisition module is used for synchronously acquiring key parameters and image data in the testing process and comprises a pressure sensor, a torque sensor, a thermocouple, a high-speed infrared thermometer and a high-speed camera; the device has the beneficial effects that reversing impact interference is avoided by adopting a continuous friction mode, uniform contact of an interface is ensured by matching with a flexible positioning sample clamping module, and the test repeatability and the data reliability are improved; the sampling frequency of the multi-parameter acquisition module is larger than or equal to 1kHz, real-time synchronous acquisition of key parameters is achieved, and comprehensive data support is provided for friction mechanism research.

Description

Technical Field

[0001] This invention belongs to the field of material mechanical property testing technology, specifically relating to a system for testing the sliding friction properties of viscoelastic bodies related to pressure and rate. Background Technology

[0002] In key fields such as aerospace and military, a large number of viscoelastic materials, such as composite solid propellants, double-base propellants, explosives, heat insulation layers, fluororubber, and silicone rubber, are widely used. Their friction properties directly affect the transportation, service, and operational safety of solid rocket motors and warheads, and are also related to the reliability of core functions such as fuel sealing and landing gear shock absorption. The mechanical response of viscoelastic materials is closely related to time and temperature. The stress-strain curves do not coincide during loading and unloading, and there is a hysteresis effect. Their friction process does not follow the laws of rigid body sliding friction, and in practical applications, they are often under high pressure, which easily leads to large deformation, making friction performance testing extremely difficult.

[0003] Especially for energetic materials, during production, storage, transportation, hoisting, maintenance, and launch, accidental friction stimulation may occur due to operational errors, drops, vibrations, etc., which may induce safety accidents such as combustion and explosion, causing casualties and huge economic losses. With the continuous improvement of the energy level of explosives and solid propellants, there is an urgent need to establish quantitative testing methods and standards for the friction performance of viscoelastic bodies. However, the lack of dedicated and accurate testing equipment in the current technology seriously restricts the safety assessment and reliability improvement of related products.

[0004] Existing sliding friction performance testing systems and devices have many shortcomings: Standard friction testing methods, such as pendulum sensitivity testers and BAM friction testers, are only applicable to some energetic material formulations. The range of applied pressure and speed is limited. They are general engineering evaluation methods and cannot capture the friction behavior of viscoelastics under complex dynamic loads, making it difficult to provide effective quantitative data support. Dynamic loading test methods, such as Hopkinson bar and hammer drop test, can test transient high strain rate impact friction, but they cannot avoid inertial effects and are difficult to obtain the cumulative change law of friction force with distance and temperature rise. They can only obtain the relative qualitative result of average friction. Reciprocating sliding devices generate instantaneous impact loads when changing direction, resulting in singularities in tangential force and sliding speed, which interferes with friction force testing. Especially under high-speed conditions, the local stress concentration at the interface is obvious, making it impossible to simulate the mechanical process of unidirectional long-distance continuous friction. Due to limitations in testing technology, it is difficult to provide a micro-scale mechanism explanation for the coupling effect between the contact surface and friction of materials with large deformation. The ability to acquire multiple parameters simultaneously is insufficient, making it impossible to simultaneously obtain key parameters such as tangential force, normal pressure, sliding rate, interface temperature, and sample deformation, and making it difficult to analyze the intrinsic correlation mechanism of pressure-rate-friction performance. Viscoelastic materials are soft and easily deformed. Existing clamping structures are prone to sample clamping damage or interface displacement during sliding, making it difficult to guarantee the reliability and accuracy of the test. Summary of the Invention

[0005] The purpose of this invention is to provide a viscoelastic pressure and rate-dependent sliding friction performance testing system, enabling independent and precise control of normal pressure and sliding rate, covering the critical rate range for viscoelastic friction safety, and providing stable and controllable low-medium-high relative sliding modes and adjustable constant pressure modes. It integrates multi-field parameter synchronous control and acquisition modules to ensure quantitative stability of the sample under load, achieving real-time synchronous acquisition and data correlation analysis of key parameters such as tangential force, normal pressure, sliding rate, friction surface temperature, and sliding displacement. It supports remote operation, ensuring the safety of experimental personnel, simplifying operation steps, and facilitating experimental process detection and test data processing. It adopts a continuous friction mode instead of reciprocating friction, improving the stability and repeatability of the testing system and obtaining accurate and reliable friction performance data. It has multi-channel image and data testing capabilities, and can acquire images of friction surface deformation and surface state through a transparent friction wheel, combined with multiple sensors to achieve comprehensive monitoring of data such as friction force, speed, and temperature.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a system for testing the pressure and rate-dependent sliding friction properties of viscoelastic bodies, comprising... The main frame provides robust support and protects the internal mechanisms; A pressure control module that enables stable sample pressurization and independent pressure regulation; A rate drive module that provides controllable relative sliding speed; A specimen clamping module that secures the specimen and prevents clamping damage and slippage. A multi-parameter acquisition module for synchronously acquiring key parameters and image data during the testing process, the multi-parameter acquisition module including a pressure sensor, a torque sensor, a thermocouple, a high-speed infrared thermometer, and a high-speed camera; A control unit that enables automated control and data processing during the testing process.

[0007] As a preferred embodiment of the present invention, the front and side surfaces of the frame body are hinged with protective doors, and multiple foot cups are installed at the bottom of the frame body.

[0008] As a preferred technical solution of the present invention, the pressure control module includes a pressure servo motor installed inside the frame body, a ball screw disposed on the output shaft of the pressure servo motor, an electric actuator threadedly connected to the ball screw, and one end of the electric actuator can penetrate through the frame body and abut against the sample fixture located above the frame body.

[0009] As a preferred technical solution of the present invention, the sample clamping module includes a sample slot opened on the top of the sample clamp, a guide hole opened inside the sample clamp, and a guide rod with one end placed in the guide hole and the other end extending out of the guide hole.

[0010] As a preferred embodiment of the present invention, it further includes an abrasive storage box located outside the sample fixture, with the other end of the guide rod passing through the abrasive storage box.

[0011] As a preferred technical solution of the present invention, a protective box is installed on the top of the main frame body, the speed drive module is disposed inside the protective box, and the speed drive module includes a friction wheel servo motor, a friction wheel, and a coupling. The output shaft of the friction wheel servo motor is connected to the main shaft of the friction wheel through the coupling, and the friction wheel is located outside the protective box.

[0012] As a preferred embodiment of the present invention, the rate drive module further includes a support base, and the torque sensor is mounted on the support base.

[0013] As a preferred technical solution of the present invention, the control unit includes a remote control module, a data processing module and a human-machine interface, and the multi-parameter acquisition module also includes a fill light.

[0014] As a preferred embodiment of the present invention, the main body of the frame is provided with heat dissipation holes and anti-collision strips, and the corners of the main body of the frame are arc-shaped.

[0015] Compared with the prior art, the beneficial effects of the present invention are: It can achieve independent control of a wide pressure range of 10N~5000N and a wide speed range of 1mm / s~1.5m / s, which can accurately simulate the actual friction conditions of viscoelastic materials and is suitable for quantitative evaluation of the friction performance of various viscoelastic materials. The continuous friction mode is adopted to avoid the interference of directional impact. Combined with the flexible positioning sample clamping module, it ensures uniform contact at the interface and improves test repeatability and data reliability. The multi-parameter acquisition module has a sampling frequency of ≥1kHz, which realizes real-time synchronous acquisition of key parameters and provides comprehensive data support for the study of friction mechanism. It supports remote control, avoiding direct contact between test personnel and hazardous samples, and ensuring operational safety; the human-machine interface integrates functions such as parameter setting, data display, and report export, simplifying the operation process and facilitating data processing; Through a visual optical path formed by a transparent friction wheel and a high-speed camera, the deformation and surface condition of the friction surface can be observed in real time. Combined with data such as temperature and friction force, the correlation analysis between macroscopic mechanical quantities and microscopic mechanisms can be realized. Under constant pressure, the frictional force corresponding to different pressures can be accurately obtained, and the deformation and surface adhesion of viscoelastic bodies can be obtained through images, which can help to understand the special characteristics of friction of viscoelastic deformable bodies. With its ingenious overall structural design, balancing rigidity and portability, and convenient installation and maintenance, it is suitable for laboratory research and engineering testing scenarios, providing key technical support for product safety assessment and reliability improvement in aerospace, military and other fields. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of a local structure in the image; Figure 3 This is a schematic diagram of the pressure regulation module structure of the present invention; Figure 4 For the present invention Figure 2 A magnified schematic diagram of the local structure; Figure 5 This is a front view of the observable optical path of sample friction according to the present invention; Figure 6 This is a side view of the sample friction observable optical path of the present invention; In the picture: 1. Main frame; 2. Protective box; 3. Friction wheel servo motor; 4. Friction wheel; 6. Pressurization servo motor; 7. Pressure sensor; 8. Sample clamp; 9. Coupling; 10. Torque sensor; 12. Electric actuator; 13. Sample slot; 14. Guide rod; 15. Wear material storage box; 16. Horn-shaped transparent ring. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1 to 6 This invention provides a system for testing the pressure and rate-dependent sliding friction properties of viscoelastic bodies, including... The main frame 1 provides stable support and protects the internal mechanisms. The core functions of the main frame 1 are "stable support" and "internal mechanism protection". It provides a rigid foundation for the entire testing system, avoids pressure and rate control deviations caused by equipment shaking during the testing process, and prevents internal precision components (such as pressurized servo motor 6, torque sensor 10, etc.) from interference from external collisions, dust, etc., to ensure long-term stable operation of the equipment. The pressure control module enables stable pressurization and independent pressure regulation of samples. "Stable pressurization" ensures that the viscoelastic sample is uniformly loaded throughout the test, avoiding pressure fluctuations from affecting the accuracy of friction performance data. "Independent pressure regulation" can meet the differentiated test pressure requirements of different viscoelastic materials (such as solid propellants and rubber) (wide range of 10N~5000N), improving the adaptability and operational flexibility of the test system. A rate drive module with controllable relative sliding rate is provided. The "controllable relative sliding rate" can accurately achieve a wide range of rate adjustment from 1 mm / s to 1.5 m / s, which is suitable for the actual friction conditions of viscoelastic materials from low speed to high speed. At the same time, it ensures that the rate is stable and without fluctuation, avoiding frictional heat generation and friction force measurement errors caused by sudden rate changes, and providing reliable conditions for analyzing the correlation mechanism between "rate and friction performance". The sample clamping module fixes the sample and prevents clamping damage and slippage. "Fixing the sample" ensures that the sample position is stable during the test, and "preventing clamping damage and slippage" can prevent the sample from being damaged due to excessive clamping force or uneven friction contact area due to slippage, ensuring uniform force on the friction surface and improving the repeatability and reliability of test data. A multi-parameter acquisition module for synchronously acquiring key parameters and image data during the testing process includes a pressure sensor 7, a torque sensor 10, a thermocouple, a high-speed infrared thermometer, and a high-speed camera. The pressure sensor 7 provides real-time feedback of normal pressure, the torque sensor 10 calculates frictional force, the thermocouple + high-speed infrared thermometer monitors interface temperature, and the high-speed camera captures surface deformation. This achieves full coverage of "mechanical parameters + temperature parameters + image information," providing comprehensive data support for analyzing the coupling mechanism of "pressure-rate-temperature-friction performance" and meeting the needs of in-depth friction mechanism research. The control unit enables automated control and data processing during the testing process, reducing manual intervention, avoiding test deviations caused by operational errors, and improving testing efficiency. The "data processing" function can automatically convert raw data collected by torque sensor 10, pressure sensor 7, etc., into intuitive curves such as friction force-pressure and friction force-rate, eliminating the need for tedious manual calculations, simplifying the data processing flow, and facilitating the rapid acquisition of test results.

[0019] In this embodiment, protective doors are hinged to the front and side surfaces of the main frame 1, which can isolate the moving parts such as the pressure servo motor 6 and ball screw inside the main frame 1 in all directions, preventing personnel from accidentally touching and injuring them during the test. At the same time, they can prevent friction debris from entering the interior and protect the precision parts. In addition, multiple feet are installed at the bottom of the main frame 1, which can flexibly adjust the level of the main frame 1 to avoid the equipment tilting due to uneven ground. This ensures that the electric push rod 12 of the pressure control module applies pressure vertically and the friction wheel 4 of the rate drive module rotates smoothly, thus ensuring test accuracy.

[0020] In this embodiment, the pressure control module includes a pressure servo motor 6 installed inside the frame body 1, a ball screw mounted on the output shaft of the pressure servo motor 6, and an electric actuator 12 threadedly connected to the ball screw. One end of the electric actuator 12 can penetrate the frame body 1 and abut against the sample clamp 8 located above the frame body 1. The pressure servo motor 6 provides high-precision power, and the ball screw converts rotational motion into linear motion, resulting in high transmission efficiency and accurate positioning, ensuring that the pressure stroke of the electric actuator 12 is controllable. The electric actuator 12 penetrates the frame body 1 and abuts against the sample clamp 8, achieving stable pressure application "from bottom to top," avoiding shaking of the sample clamp 8 during pressure application. At the same time, the structure is compact, saving equipment space, and the pressure transmission is direct, reducing energy loss and improving pressure control accuracy.

[0021] In this embodiment, the sample clamping module includes a sample groove 13 opened on the top of the sample clamp 8, a guide hole opened inside the sample clamp 8, and a guide rod 14 with one end placed in the guide hole and the other end extending out of the guide hole. The sample groove 13 provides a dedicated positioning space for the viscoelastic sample, avoids sample placement deviation, and ensures accurate contact position between the sample and the friction wheel 4. The guide hole and the guide rod 14 cooperate to guide the up and down movement of the sample clamp 8, prevent the sample clamp 8 from tilting, ensure that the normal pressure acts perpendicularly on the sample, and avoid friction performance measurement errors caused by force deviation.

[0022] In this embodiment, a wear material collection box 15 located outside the sample fixture 8 is also included. The other end of the guide rod 14 passes through the wear material collection box 15. The wear material collection box 15 can collect the debris generated by the friction of the viscoelastic sample during the test, avoiding debris from scattering and contaminating the normal operation of the equipment. At the same time, it is convenient to clean after the test and improves the ease of operation. The guide rod 14 passes through the wear material collection box 15, further restricting the movement trajectory of the guide rod 14, enhancing the movement stability of the sample fixture 8, and indirectly ensuring the accuracy of the pressure and friction test.

[0023] In this embodiment, a protective box 2 is installed on the top of the main frame 1. The speed drive module is located inside the protective box 2 and includes a friction wheel servo motor 3, a friction wheel 4, and a coupling 9. The output shaft of the friction wheel servo motor 3 is connected to the main shaft of the friction wheel 4 through the coupling 9, and the friction wheel 4 is located on the outside of the protective box 2. The protective box 2 provides protection for the speed drive components such as the friction wheel servo motor 3, preventing dust and debris from entering or being accidentally touched by personnel, and ensuring the safe operation of the components. The coupling 9 connects the friction wheel servo motor 3 and the friction wheel 4, transmitting torque stably, reducing speed fluctuations, and ensuring that the linear speed of the friction wheel 4 is accurately controllable. The friction wheel 4 is located on the outside of the protective box 2, which facilitates the formation of a friction pair with the sample on the sample holder 8, and also facilitates the replacement of friction wheels 4 of different materials (stainless steel, transparent sapphire glass) or specifications, improving the versatility of the testing system.

[0024] In this embodiment, the rate drive module also includes a support base, on which the torque sensor 10 is mounted. The support base provides a stable mounting foundation for the torque sensor 10, preventing displacement of the torque sensor 10 due to equipment vibration or the rotation of the friction wheel 4, thus ensuring the accuracy of torque measurement. At the same time, the support base can distribute the stress on the torque sensor 10 and extend its service life.

[0025] In this embodiment, the control unit includes a remote control module, a data processing module, and a human-machine interface. The multi-parameter acquisition module also includes a supplementary light. The remote control module of the control unit allows personnel to stay away from the test area (especially for hazardous samples such as energetic materials), greatly improving operational safety. The data processing module automatically completes data correlation analysis, and the human-machine interface intuitively displays parameter settings, real-time data, and curves, reducing the operational threshold. The addition of a supplementary light to the multi-parameter acquisition module can enhance the image clarity captured by the high-speed camera, especially when using the transparent friction wheel 4 to observe sample surface deformation, avoiding image blurring caused by insufficient light and ensuring the effectiveness of the visualized data.

[0026] In this embodiment, the main body 1 of the rack is provided with heat dissipation holes and anti-collision strips, and the corners of the main body 1 of the rack are rounded. The heat dissipation holes can timely dissipate the heat generated by the internal components such as the pressurized servo motor 6 when they are working, so as to avoid performance degradation or failure caused by overheating of the equipment and ensure long-term continuous testing. The anti-collision strips and rounded corners design can reduce the risk of personnel injury from collisions during operation, and at the same time prevent the main body 1 of the rack itself from being damaged by collisions, thereby improving the safety and durability of the equipment.

[0027] Figure 5 , Figure 6 A flared transparent ring 16 is also provided on the inner side of the transparent friction wheel 4.

[0028] The working principle and usage process of this invention: Select a friction wheel 4 with appropriate material (such as stainless steel or transparent sapphire glass) and specifications according to the test requirements, and fix it to the output shaft of the friction wheel servo motor 3 through the coupling 9 to ensure that the connection is tight and without looseness; if a transparent friction wheel 4 is selected, the angle of the supplementary light needs to be adjusted to provide sufficient light for subsequent image acquisition. Place the prepared viscoelastic sample steadily into the sample slot 13 at the top of the sample holder 8, ensuring that the sample is centered and without offset or tilt to avoid affecting the contact effect with the friction wheel 4; check that the sample surface is free of damage and impurities to ensure the consistency of the test benchmark. Confirm that one end of the guide rod 14 is placed in the guide hole inside the sample clamp 8, and the other end passes through the wear debris collection box 15, so that the sample clamp 8 can move smoothly up and down along the guide rod 14; fix the wear debris collection box 15 to the outside of the sample clamp 8 to ensure its stable position and effectively collect friction debris. Log in to the system through the human-machine interface of the control unit, and enter basic information such as the experiment name, sample type, and test number; set the pressure parameters, rate parameters, and test duration according to the test plan to complete the parameter preset; Start the pressure control module and control the pressurization servo motor 6 through the human-machine interface to drive the ball screw to move the electric push rod 12 upward, so that one end of the electric push rod 12 abuts against the bottom of the sample holder 8; observe the real-time pressure value fed back by the pressure sensor 7, click the "zero" button to calibrate the zero point, and ensure accurate pressure measurement; The starting speed drive module was activated to test the operating status of the friction wheel servo motor 3. The rotational speed stability of the friction wheel 4 was verified by the feedback data from the torque sensor 10 to ensure that the speed was stable. The angle of the high-speed camera was adjusted so that it could clearly capture the contact area between the sample and the friction wheel 4. At the same time, it was confirmed that the thermocouple and the high-speed infrared thermometer could monitor the temperature data normally. Testers can remotely control the system from the test area to avoid direct contact with the operating parts of the equipment (especially for hazardous samples such as energetic materials) and ensure operational safety; they can issue a "start test" command through the human-machine interface and the system will automatically enter the test process. The pressure control module applies stable pressure to the sample clamp 8 according to the preset pressure value through the coordinated action of the pressurizing servo motor 6, ball screw and electric push rod 12. The pressure sensor 7 provides real-time feedback of pressure data and dynamically adjusts the pressure through the force feedback closed-loop system to ensure that the pressure is stable within the preset range. The rate drive module starts the friction wheel servo motor 3 at a preset rate, driving the friction wheel 4 to rotate smoothly and form a sliding friction pair with the viscoelastic sample in the sample tank 13; the multi-parameter acquisition module starts synchronously and acquires key data such as pressure sensor 7 (normal pressure), torque sensor 10 (friction torque), thermocouple and high-speed infrared thermometer (interface temperature), and high-speed camera (surface deformation image) in real time at a sampling frequency of ≥1kHz, and the data is transmitted to the control unit in real time. During the test, the changes in parameters such as pressure, rate, temperature, and torque are monitored in real time through the human-machine interface of the control unit. The contact state between the sample and the friction wheel 4, sample deformation, and debris generation are observed. If abnormal parameters or equipment failure occur, the test can be stopped in an emergency through the remote control module. The multi-parameter acquisition module continuously and synchronously records various data, and the data processing module of the control unit automatically performs preliminary processing on the raw data to generate real-time correlation curves such as friction force-pressure, friction force-rate, and temperature-time, which facilitates the testers to judge the test status in real time. If test parameters need to be adjusted during the test (such as fine-tuning of pressure and rate under special working conditions), they can be modified remotely through the human-machine interface. The system will automatically respond and adjust the equipment operating status to ensure the continuity of the test. After the preset test duration is reached, the system automatically stops the speed drive module and the friction wheel 4 gradually decelerates to a stop; the pressure control module runs in reverse, the electric push rod 12 resets downward, releasing the pressure on the sample clamp 8, and the pressure sensor 7 returns the pressure value to the initial state; The data processing module of the control unit is controlled through the human-computer interaction interface to perform final analysis on the test data and generate a complete test report, which includes curves of various parameters, statistical results and image data; clicking the "Data Export" button saves the test report to the specified storage path and completes the data archiving.

[0029] Although embodiments of the invention have been shown and described (see the detailed description above), it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A system for testing the pressure-rate-dependent sliding friction properties of viscoelastic bodies, characterized in that: include A rack body that provides stable support and protects the internal structure (1); A pressure control module that enables stable sample pressurization and independent pressure regulation; A rate drive module that provides controllable relative sliding speed; A specimen clamping module that secures the specimen and prevents clamping damage and slippage. A multi-parameter acquisition module for synchronously acquiring key parameters and image data during the test process, the multi-parameter acquisition module includes a pressure sensor (7), a torque sensor (10), a thermocouple, a high-speed infrared thermometer, and a high-speed camera; A control unit that enables automated control and data processing during the testing process.

2. The viscoelastic body pressure and rate-dependent sliding friction performance testing system according to claim 1, characterized in that: The front and side surfaces of the frame body (1) are hinged with protective doors, and multiple foot cups are installed at the bottom of the frame body (1).

3. The viscoelastic body pressure and rate-dependent sliding friction performance testing system according to claim 1, characterized in that: The pressure control module includes a pressure servo motor (6) installed inside the frame body (1), a ball screw set on the output shaft of the pressure servo motor (6), and an electric push rod (12) threadedly connected to the ball screw. One end of the electric push rod (12) can penetrate the frame body (1) and abut against the sample clamp (8) located above the frame body (1).

4. The viscoelastic body pressure and rate-dependent sliding friction performance testing system according to claim 3, characterized in that: The sample clamping module includes a sample slot (13) opened on the top of the sample clamp (8), a guide hole opened inside the sample clamp (8), and a guide rod (14) with one end placed in the guide hole and the other end extending out of the guide hole.

5. The viscoelastic body pressure and rate-dependent sliding friction performance testing system according to claim 4, characterized in that: It also includes an abrasive storage box (15) located outside the sample holder (8), with the other end of the guide rod (14) passing through the abrasive storage box (15).

6. The viscoelastic body pressure and rate-dependent sliding friction performance testing system according to claim 1, characterized in that: The top of the frame body (1) is equipped with a protective box (2). The speed drive module is located inside the protective box (2). The speed drive module includes a friction wheel servo motor (3), a friction wheel (4), and a coupling (9). The output shaft of the friction wheel servo motor (3) is connected to the main shaft of the friction wheel (4) through the coupling (9). The friction wheel (4) is located outside the protective box (2).

7. The viscoelastic body pressure and rate-dependent sliding friction performance testing system according to claim 6, characterized in that: The rate drive module also includes a support base, on which the torque sensor (10) is mounted.

8. The viscoelastic body pressure and rate-dependent sliding friction performance testing system according to claim 1, characterized in that: The control unit includes a remote control module, a data processing module, and a human-machine interface. The multi-parameter acquisition module also includes a supplementary light.

9. The viscoelastic body pressure and rate-dependent sliding friction performance testing system according to claim 1, characterized in that: The frame body (1) is provided with heat dissipation holes and anti-collision strips, and the corners of the frame body (1) are arc-shaped.

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