A small tonnage damper hysteresis loading test system

Abstract

This invention relates to a hysteretic loading test system for small-tonnage dampers, belonging to the field of vibration control technology. It includes a steel main frame, H-beams, a lifting system, a guiding device, a loading system, a data acquisition system, and a damper connection device. The steel main frame includes a top plate, a bottom plate, and a platform plate on the same plane of symmetry; the lifting system includes a worm gear lift, a lead screw, an AC motor, and eccentric blocks; the guiding device includes two spaced linear optical axes; the loading system includes a servo electric cylinder, a servo driver, a braking resistor, and a PLC module; the data acquisition system includes a data acquisition instrument, sensor connectors, spoke-type tension / compression sensors, synchronization bolts, and wire-type displacement gauges; the damper connection device includes a force transmission support and a damper connection conversion platform. This invention can be applied to hysteretic loading tests of small-tonnage dampers, testing the mechanical properties of dampers, and can also be applied to other mechanical tests.

Description

Technical Field

[0001] This invention relates to a hysteresis loading test system for small-tonnage dampers, belonging to the field of vibration control technology. Background Technology

[0002] Dampers (energy dissipation and vibration reduction devices) are one of the important ways to achieve vibration control, especially in the field of passive control technology. Structures equipped with dampers can absorb the energy of vibrations caused by earthquakes or wind-induced vibrations through the damping material or other energy dissipation mechanisms of the dampers, converting it into other forms of energy, such as heat. This process of dissipating vibration energy achieves a vibration response for the structure. In addition, dampers have wide applications in many fields such as mechanical engineering, transportation, aerospace, electronic equipment, and sports equipment, playing a vital role in engineering.

[0003] Taking the field of building structure vibration control technology as an example, small-tonnage dampers have wide applications in practical engineering or testing, such as damping units in mass-tuned dampers and vibration reduction devices used in various scaled-down model tests. In addition, a new, efficient, economical, and safe damper typically requires a process from feasibility testing to performance evaluation and finally product standardization. Therefore, the miniaturization design and testing of new dampers as a feasibility test is particularly important.

[0004] Secondly, dampers can be classified into displacement type, velocity type, or composite type according to common types. Displacement type dampers are usually only related to the actual relative displacement generated, such as friction dampers and metal yield type dampers. Their motion rate usually has little effect on the damping force. Velocity type dampers are closely related to the loading rate, such as viscous dampers, eddy current dampers, and electromagnetic dampers. These types of dampers place higher requirements on variable rate loading tests.

[0005] Furthermore, to ensure that the damper functions properly and meets design requirements, rigorous performance testing and evaluation are necessary. Traditional damper performance testing methods have many limitations. For example, the loading equipment typically uses hydraulic cylinders, which, in addition to being prone to issues such as fluid leakage, are difficult to control the acceleration rate. If high-precision, automated control is required, using hydraulic cylinders would incur high costs. Secondly, existing damper testing systems are usually designed for large-tonnage damping devices, which are typically large in size. Conducting mechanical performance tests on small-tonnage devices is very inconvenient. For longer cylinders or dampers, lateral constraint supports are usually required to prevent instability during compression. In addition, different dampers have different dimensions, and conducting tests and on-site installations typically consume a lot of manpower. Sometimes, it is even necessary to design various adapters to accommodate dampers of different shapes.

[0006] The test device for testing the multi-directional loading force of hydraulic dampers disclosed in CN117589437A, the test device and test method for the performance of aerospace dampers disclosed in CN114088368A, and the open vibration damping test bench disclosed in CN220339626U all have the above-mentioned confirmations or problems.

[0007] Therefore, there is an urgent need to propose a new hysteresis loading test system for small-tonnage dampers to solve the problems existing in the current technology. Summary of the Invention

[0008] In view of the above-mentioned defects in the existing technology, the present invention proposes a hysteresis loading test system for small-tonnage dampers, which is used for hysteresis loading tests of small-tonnage dampers to test the mechanical properties of the dampers, and can also be applied to some other mechanical tests.

[0009] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0010] A hysteresis loading test system for a small-tonnage damper includes a steel main frame, an H-beam, a lifting system connected to the H-beam and a guide device set at intervals, as well as a loading system, a data acquisition system and a damper connection device connected to the base plate.

[0011] The main steel structure frame includes four square steel tubes symmetrically arranged at the four corners, and a top plate, a bottom plate, and a platform plate arranged on the same symmetrical plane at the top, bottom, and middle positions of the square steel tubes.

[0012] The lifting system includes a worm gear lift and a lead screw and an AC motor connected thereto. The bottom of the lead screw is connected to an H-beam via a flange.

[0013] The guiding device includes two linear optical axes spaced apart. The top and bottom of the optical axes are inserted into the top plate and the platform plate, respectively. A linear bearing is inserted in the middle of the optical axes and is embedded in the H-shaped steel beam.

[0014] The loading system includes an electrically connected servo electric cylinder, a servo driver, a braking resistor, and a PLC module;

[0015] The data acquisition system includes a data acquisition instrument and a sensor connector connected to the actuating end of the servo electric cylinder. It also includes a spoke-type tension / compression sensor and a synchronization bolt connected to the sensor connector. A wire-type displacement gauge is installed between the synchronization bolt and the platform plate. The sensor connector is threaded to the actuating end of the servo electric cylinder. The spoke-type tension / compression sensor and the sensor connector are on the same axis and are bolted together through the outer ring mounting holes of the spoke-type tension / compression sensor. The synchronization bolt and the sensor connector are threaded together in the horizontal direction. The wire end of the wire-type displacement gauge is connected to the synchronization bolt, and the wire box of the wire-type displacement gauge is magnetically connected to the platform plate.

[0016] The damper connection device includes a force transmission support and a damper connector conversion platform that are sequentially connected to the spoke-type tension and compression sensor.

[0017] Furthermore, the top plate, the bottom plate, and the platform plate have symmetrical planes that overlap along their side lengths. Four square steel pipes are symmetrically arranged at the four corners of the top plate, the bottom plate, and the platform plate. The top of each square steel pipe is welded to one side of the top plate, the bottom of each square steel pipe is welded to the four corners of the bottom plate, and the square steel pipe is fixed to the four corners of the platform plate with bolts.

[0018] Furthermore, the top plate and the bottom plate are provided with steel flat bars on all four sides; the four sides of the top plate and the bottom plate are respectively welded and fixed to the long sides of the steel flat bars, and the short sides at both ends of the steel flat bars are welded and fixed to the square steel pipe.

[0019] Furthermore, the rotating shaft of the AC motor and the worm gear of the worm gear jack are on the same axis. The worm gear jack is provided with an eccentric pad, so that the eccentric pad and the bottom surface of the AC motor are on the same horizontal plane. The lead screw passes through the worm gear of the worm gear jack and coincides with the central axis of the top plate. The flange at the bottom of the lead screw is bolted to the center position of the H-shaped steel beam.

[0020] Furthermore, the bottom end of the linear optical axis is bolted to the platform plate.

[0021] Furthermore, the lower flange of the servo electric cylinder is bolted to the base plate, the axis of the servo electric cylinder body coincides with the central axis of the base plate, and the upper flange of the servo electric cylinder is bolted to the platform plate.

[0022] Furthermore, the servo driver, the braking resistor, and the PLC module are respectively placed on the base plate, and the servo driver, the braking resistor, and the PLC module are connected by a wiring harness to ensure normal communication of the loading system.

[0023] Furthermore, the force transmission support is on the same axis as the spoke-type tension / compression sensor and is connected to the internal thread of the spoke-type tension / compression sensor; the damper connector conversion platform is on the same axis as the force transmission support and is connected by bolts.

[0024] Furthermore, the damper connector conversion platform can be arbitrarily combined and connected with a ball joint connector or a double-ear connector.

[0025] Furthermore, the data acquisition device is placed on the base plate, and the data acquisition device is connected to the spoke-type tension / compression sensor and the wire-type displacement gauge through a wiring harness to ensure normal communication of the data acquisition system.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] This application provides a hysteresis loading test system for small-tonnage dampers, which has the following advantages:

[0028] 1. This type of damper hysteresis loading test system uses a servo electric cylinder as the loading device. The servo electric cylinder can realize precise control of loading displacement and speed as well as automation process, such as unidirectional uniform speed loading, sine wave loading or triangular wave loading, etc. In addition, the displacement amplitude, loading frequency and number of cycles of hysteresis loading can be set arbitrarily during the automation process.

[0029] 2. This type of damper hysteresis loading test system can meet the testing requirements of various small dampers with a load of less than 1 ton and a longitudinal length of less than 1.2 meters. The platform plate provides lateral support for the servo electric cylinder, which improves the stability of the loading device. Secondly, due to the presence of the guide device, sufficient out-of-plane constraints are provided for the H-beam. These measures work together to ensure that the damper does not become unstable during the compression process to the greatest extent.

[0030] 3. This type of damper hysteresis loading test system uses a worm gear lift with an AC motor. The lifting of the lead screw can be controlled by a forward / reverse switch, allowing for free and convenient adjustment of the position of the H-beam according to the length of the damper. At the same time, the worm gear mechanism has a self-locking capability in a static state, saving a lot of manpower costs for damper installation.

[0031] 4. The damper connection device of this type of damper hysteresis loading test system includes a force transmission support, a double-ear connector, a ball joint connector, and a damper connector conversion platform, which can be freely combined to provide a variety of convenient options for meeting different damper connection methods.

[0032] 5. This type of damper hysteresis loading test system can not only be applied to hysteresis loading tests of various small-tonnage dampers, but also allows for the design of connecting parts with pre-reserved mounting holes to conduct unidirectional mechanical tests, such as uniaxial tensile / compression tests. This demonstrates the wide applicability of this test system.

[0033] 6. This type of damper hysteresis loading test system is designed using standardized parts, which effectively controls production costs and has high economic value. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing this application; for example, based on the technical concepts disclosed in this application and the exemplary drawings, those skilled in the art are able to easily make conventional adjustments or further optimizations to the addition / reduction / classification, specific shapes, positional relationships, connection methods, and size ratios of certain units (components).

[0035] Figure 1 A three-dimensional structural schematic diagram of a hysteresis loading test system for a small-tonnage damper from one perspective;

[0036] Figure 2 A three-dimensional structural schematic diagram of a hysteresis loading test system for a small-tonnage damper from another perspective;

[0037] Figure 3 A schematic diagram of the main steel frame of a hysteresis loading test system for a small-tonnage damper;

[0038] Figure 4 This is a schematic diagram of the assembly of the lifting system and the H-beam in a hysteresis loading test system for a small-tonnage damper.

[0039] Figure 5 This is a schematic diagram of the assembly of the guide device with the top plate, platform plate and H-beam in a hysteresis loading test system for a small-tonnage damper.

[0040] Figure 6 This is a schematic diagram of the assembly of the loading system and the base plate in a hysteresis loading test system for a small-tonnage damper.

[0041] Figure 7 This is a schematic diagram of the assembly of the data acquisition system, the base plate, and the servo electric cylinder in a hysteresis loading test system for a small-tonnage damper.

[0042] Figure 8 This is a schematic diagram of the assembly of a damper connection device and a spoke-type tension / compression sensor in a hysteresis loading test system for a small-tonnage damper, wherein the damper connector in the damper connection device is a double-ear connector.

[0043] Figure 9 This is a schematic diagram of the assembly of a damper connection device and a spoke-type tension / compression sensor in a hysteresis loading test system for a small-tonnage damper, wherein the damper connector in the damper connection device is a ball joint connector.

[0044] Figure 10 This is an assembly diagram of a damper applied to a hysteresis loading test system for a small-tonnage damper provided in this application, as shown in one embodiment.

[0045] Figure 11 The figure shows the hysteresis curve test results of a velocity-type damper applied to a hysteresis loading test system for a small-tonnage damper provided in this application, under different sinusoidal loading frequencies, in one embodiment.

[0046] Figure label:

[0047] 1. Square steel pipe; 2. Top plate; 3. Platform plate; 4. Bottom plate; 5. Steel flat bar; 6. Linear optical axis; 7. H-beam; 8. Linear bearing; 9. Screw; 10. Flange; 11. Worm gear jack; 12. AC motor; 13. Eccentric pad; 14. Servo electric cylinder; 15. Sensor connector; 16. Spoke-type tension / compression sensor; 17. Force transmission support; 18. Damper connector conversion platform; 19. Double-ear connector; 20. Pin; 21. Wire displacement gauge; 22. Synchronization bolt; 23. Braking resistor; 24. Servo driver; 25. PLC module; 26. Data acquisition instrument; 27. Damper; 28. Ear plate connector. Detailed Implementation

[0048] In the description of this application: unless otherwise stated, "a plurality of" means two or more. The terms "first," "second," "third," etc., in this application are intended to distinguish the objects referred to and do not have any special meaning in terms of technical connotation (e.g., they should not be construed as an emphasis on importance or order). Expressions such as "comprising," "including," and "having" also mean "not limited to" (certain units, components, materials, steps, etc.).

[0049] The terms used in this application, such as "upper," "lower," "left," "right," and "middle," are generally used to facilitate intuitive understanding by referring to the accompanying drawings, and are not absolute limitations on the positional relationships in the actual product. Changes in these relative positional relationships, without departing from the technical concept disclosed in this application, should also be considered within the scope of this application.

[0050] Example 1

[0051] The following is in conjunction with the appendix Figure 1-9 The structure and working principle of the hysteresis loading test system for small-tonnage dampers provided by the present invention are further explained.

[0052] like Figure 1-2 As shown, a small-tonnage damper hysteresis loading test system of this embodiment includes a steel structure main frame, an H-beam 7, a lifting system connected to the H-beam 7 and a guide device set at intervals, a loading system connected to the base plate 4, a data acquisition system connected to the actuating end of the servo electric cylinder 14, and a damper connection device.

[0053] In this embodiment, as Figure 3 As shown, the main steel structure frame includes four square steel pipes 1 symmetrically arranged at the four corners, and a top plate 2, a bottom plate 4, and a platform plate 3 arranged on the same symmetrical plane at the top, bottom, and middle positions of the square steel pipes 1. That is, the top plate 2, bottom plate 4, and platform plate 3 on the same symmetrical plane, the top plate 2, bottom plate 4, and platform plate 3 are symmetrically arranged with four square steel pipes 1 at the four corners, and the top plate and bottom plate are respectively provided with steel flat strips 5 on the four sides of the bottom plate; wherein, the symmetrical planes of the top plate 2, the bottom plate 4, and the platform plate 3 along the side length direction coincide with each other, the top plate 2, the bottom plate 4, and the platform plate 3 are symmetrically arranged with four square steel pipes 1 at the four corners, the top of the square steel pipe 1 is welded and fixed to one side of the top plate 2, the bottom of the square steel pipe 1 is welded to the four missing corners of the bottom plate 4, and the square steel pipe 1 is fixed to the four missing corners of the platform plate 3 with bolts.

[0054] The top plate 2 and the bottom plate 4 are respectively welded and fixed to the long side of the steel flat strip 5, and the short sides of the two ends of the steel flat strip 5 are welded and fixed to the square steel pipe 1.

[0055] In this embodiment, as Figure 4 As shown, the lifting system includes a worm gear lift 11 and a lead screw 9 that passes through the worm gear lift 11, an AC motor 12 that drives the worm gear to rotate, and an eccentric block 13 that ensures that the worm gear and the AC motor 12 are on the same working axis. One end of the lead screw 9 is connected to the H-beam 7 through a flange 10. The shaft of the AC motor 12 is on the same axis as the worm gear of the worm gear lift 11. The worm gear lift 11 is provided with an eccentric block 13 so that the eccentric block 13 and the bottom surface of the AC motor 12 are on the same horizontal plane. The lead screw 9 passes through the worm gear of the worm gear lift 11 and coincides with the central axis of the top plate 2. One end of the lead screw 9 is provided with a flange 10 and is bolted to the center of the H-beam 7.

[0056] In this embodiment, as Figure 5As shown, the guiding device includes two linear optical axes 6 spaced apart. The top and bottom of the optical axes 6 are respectively inserted into the top plate 2 and the platform plate 3. A linear bearing 8 is inserted in the middle of the optical axis 6. The linear bearing 8 is embedded in the H-shaped steel beam 7, that is, two linear bearings 8 are symmetrically embedded inside the H-shaped steel beam 7. The bottom end of the linear optical axis 6 is bolted to the platform plate 3.

[0057] In this embodiment, as Figure 6 As shown, the loading system includes an electrically connected servo-electric cylinder 14, a servo driver 24, a braking resistor 23, and a PLC module 25 mounted on a base plate 4. The lower flange of the servo-electric cylinder 14 is bolted to the base plate 4, and the axis of the cylinder body of the servo-electric cylinder 14 coincides with the central axis of the base plate 4. The upper flange of the servo-electric cylinder 14 is bolted to the platform plate 3. The servo driver 14, the braking resistor 23, and the PLC module 25 are respectively mounted on the base plate 4. The servo driver 24, the braking resistor 23, and the PLC module 25 are connected via a wiring harness to ensure normal communication of the loading system.

[0058] In this embodiment, as Figure 7 As shown, the data acquisition system includes a data acquisition instrument 26 and a sensor connector 15 connected to the actuating end of the servo electric cylinder 14, as well as a spoke-type tension / compression sensor 16 and a synchronization bolt 22 connected to the sensor connector 15. The two ends of the pull-wire displacement gauge 21 are connected to the synchronization bolt 22 and the platform plate 3, respectively. The sensor connector 15 is threadedly connected to the actuating end of the servo electric cylinder 14. The spoke-type tension / compression sensor 16 and the sensor connector 15 are on the same axis and are bolted together through the outer ring mounting hole of the spoke-type tension / compression sensor 16. The synchronization bolt 22 and the sensor connector 15 are threadedly connected in the horizontal direction. The pull end of the pull-wire displacement gauge 21 is connected to the synchronization bolt 22. The pull box of the pull-wire displacement gauge 21 is magnetically connected to the platform plate 3.

[0059] The data acquisition instrument 26 is placed on the base plate 4. The data acquisition instrument 26 is connected to the spoke-type tension and compression sensor 16 and the wire-type displacement meter 21 through a wiring harness to ensure normal communication of the data acquisition system.

[0060] In this embodiment, as Figure 8-9As shown, the damper connection device includes a force transmission support 17 and a damper connector conversion platform 18 sequentially connected to the spoke-type tension / compression sensor 16. The force transmission support 17 is coaxial with the spoke-type tension / compression sensor 16 and is connected to the internal thread of the spoke-type tension / compression sensor 16. The damper connector conversion platform 18 is coaxial with the force transmission support 17 and is connected by bolts. The damper connector conversion platform 18 can be arbitrarily combined and connected with the ball joint connector 19 or the double-ear connector 20.

[0061] Example 2

[0062] The hysteresis loading test system for small-tonnage dampers provided in this application can be used for hysteresis loading tests of dampers. The specific structural composition of this type of damper hysteresis loading test system is the same as that in Embodiment 1, and will not be repeated here.

[0063] like Figure 10 As shown, in this embodiment, the fixed end of the damper 27 is fixed to the H-shaped steel beam by bolts, and the moving end of the damper 27 is connected to the double-ear connector 20 through the ear plate connector 28. Similarly, the hysteresis curves of a certain velocity-type damper at different loading frequencies are shown below. Figure 11 As shown, the test system can successfully carry out the loading test of the damper.

[0064] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. These embodiments not explicitly stated should also be considered as being within the scope of this specification.

[0065] The present application has been described in a relatively specific and detailed manner above through general descriptions and specific embodiments. It should be understood that, based on the technical concept of the present application, several conventional adjustments or further innovations can be made to these specific embodiments. However, as long as they do not depart from the technical concept of the present application, the technical solutions obtained by these conventional adjustments or further innovations also fall within the protection scope of the claims of the present application.

Claims

1. A hysteresis loading test system for a small-tonnage damper, comprising a steel main frame, an H-beam (7), a lifting system connected to the H-beam (7) and a guide device spaced apart, and a loading system, a data acquisition system, and a damper connection device connected to a base plate, characterized in that: The main steel frame includes four square steel tubes (1) arranged symmetrically at the four corners, and a top plate (2), a bottom plate (4), and a platform plate (3) arranged on the same symmetrical plane at the top, bottom, and middle positions of the square steel tubes (1). The lifting system includes a worm gear lift (11) and a lead screw (9) and an AC motor (12) connected thereto. The bottom of the lead screw (9) is connected to the H-beam (7) via a flange (10). The guiding device includes two linear optical axes (6) spaced apart. The top and bottom of the optical axes (6) are inserted into the top plate (2) and the platform plate (3) respectively. A linear bearing (8) is inserted in the middle of the optical axes (6). The linear bearing (8) is embedded in the H-shaped steel beam (7). The loading system includes an electrically connected servo electric cylinder (14), a servo driver (24), a braking resistor (23), and a PLC module (25); The data acquisition system includes a data acquisition instrument (26) and a sensor connector (15) connected to the actuating end of the servo electric cylinder (14). It also includes a spoke-type tension and compression sensor (16) and a synchronization bolt (22) connected to the sensor connector (15). A pull-wire displacement meter (21) is provided between the synchronization bolt (22) and the platform plate (3). The sensor connector (15) is threadedly connected to the actuating end of the servo electric cylinder (14). The spoke-type tension and compression sensor (16) and the sensor connector (15) are on the same axis and are bolted together through the outer ring mounting hole of the spoke-type tension and compression sensor (16). The synchronization bolt (22) and the sensor connector (15) are threadedly connected in the horizontal direction. The pull-wire end of the pull-wire displacement meter (21) is connected to the synchronization bolt (22). The pull-wire box of the pull-wire displacement meter (21) is magnetically connected to the platform plate (3). The damper connection device includes a force transmission support (17) and a damper connector conversion platform (18) that are sequentially connected to the spoke-type tension and compression sensor (16).

2. The hysteresis loading test system for a small-tonnage damper according to claim 1, characterized in that: The top plate (2) coincides with the symmetrical plane of the bottom plate (4) and the platform plate (3) along the side length direction. Four square steel pipes (1) are symmetrically arranged at the four corners of the top plate (2), the bottom plate (4) and the platform plate (3). The top of the square steel pipe (1) is welded to one side of the top plate (2). The bottom of the square steel pipe (1) is welded to the four missing corners of the bottom plate (4). The square steel pipe (1) is fixed to the four missing corners of the platform plate (3) with bolts.

3. The hysteresis loading test system for a small-tonnage damper according to claim 2, characterized in that: The top plate (2) and the bottom plate (4) are provided with steel flat strips (5) on all four sides; the four sides of the top plate (2) and the bottom plate (4) are respectively welded and fixed to the long side of the steel flat strip (5), and the short sides at both ends of the steel flat strip (5) are welded and fixed to the square steel pipe (1).

4. The hysteresis loading test system for a small-tonnage damper according to claim 1, characterized in that: The rotating shaft of the AC motor (12) is on the same axis as the worm gear of the worm gear jack (11). The worm gear jack (11) is provided with an eccentric pad (13) so that the eccentric pad (13) and the bottom surface of the AC motor (12) are on the same horizontal plane. The lead screw (9) passes through the worm gear of the worm gear jack (11) and coincides with the central axis of the top plate (2). The flange (10) provided at the bottom of the lead screw (9) is bolted to the center position of the H-shaped steel beam (7).

5. The hysteresis loading test system for a small-tonnage damper according to claim 1, characterized in that: The bottom end of the linear optical axis (6) is bolted to the platform plate (3).

6. The hysteresis loading test system for a small-tonnage damper according to claim 1, characterized in that: The lower flange of the servo electric cylinder (14) is bolted to the base plate (4), the axis of the cylinder body of the servo electric cylinder (14) coincides with the central axis of the base plate (4), and the upper flange of the servo electric cylinder (14) is bolted to the platform plate (3).

7. The hysteresis loading test system for a small-tonnage damper according to claim 6, characterized in that: The servo driver (24), the braking resistor (23), and the PLC module (25) are respectively placed on the base plate (4). The servo driver (24), the braking resistor (23), and the PLC module (25) are connected by a wiring harness to ensure normal communication of the loading system.

8. The hysteresis loading test system for a small-tonnage damper according to claim 1, characterized in that: The force transmission support (17) is on the same axis as the spoke-type tension and compression sensor (16) and is connected to the internal thread of the spoke-type tension and compression sensor (16). The damper connector conversion platform (18) is on the same axis as the force transmission support (17) and is connected by bolts.

9. A hysteresis loading test system for a small-tonnage damper according to claim 8, characterized in that: The damper connector conversion platform (18) is connected to the ball joint connector (19) or the double-ear connector (20) in any combination.

10. A hysteresis loading test system for a small-tonnage damper according to any one of claims 1-9, characterized in that: The data acquisition instrument (26) is placed on the base plate (4). The data acquisition instrument (26) is connected to the spoke-type tension and compression sensor (16) and the wire-type displacement meter (21) through a wire harness to ensure normal communication of the data acquisition system.

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