A multi-directional loading force testing device for hydraulic dampers

Abstract

This utility model belongs to the field of mechanical testing technology, and particularly relates to a multi-directional loading force testing device for a hydraulic damper. It includes a fixed frame, an electric push rod, an electric slide rail, an electric slider, support plates, support frames, and locking bolts. The electric push rod is installed on the upper part of the fixed frame, with its piston rod extending vertically downwards. The electric slide rail is installed at the end of the piston rod of the electric push rod, and an electric slider is slidably mounted on it. A support plate is installed at the lower part of the fixed frame and at the bottom of the electric slider. A support frame is installed on the side of each support plate that is close to each other, and a locking bolt is fixed to each support frame. The electric push rod provides axial loading power, and combined with the lateral movement function of the electric slide rail and the electric slider, it achieves multi-directional loading capability on the hydraulic damper body. This overcomes the limitation of traditional devices that can only perform unidirectional loading, supports flexible switching from axial testing to multi-directional composite loading, and significantly improves the device's testing dimensions and working condition simulation capabilities.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical testing technology, and in particular relates to a multi-directional loading force testing device for hydraulic dampers. Background Technology

[0002] With the increasing demands for vibration control in modern industrial equipment, hydraulic dampers are being used more and more widely in fields such as rail transportation, engineering machinery, and building structures. After production, hydraulic dampers need to undergo a load test to evaluate their mechanical properties and dynamic response characteristics during operation. This test is an important means to comprehensively understand product performance, verify design specifications, and ensure quality consistency. It plays a crucial role in evaluating their damping characteristics, response stability, and long-term durability.

[0003] However, most traditional load testing devices are mainly axial loads, and their structural design focuses on achieving stable unidirectional force output. In terms of testing function, they are more suitable for basic performance verification under standard working conditions. When dealing with complex stress scenarios, the loading direction of these devices is fixed, making it difficult to extend to the testing requirements of multi-directional loads, which limits the comprehensive examination of the mechanical behavior of hydraulic dampers under diverse working conditions.

[0004] Therefore, there is a particular need for a multi-directional loading force testing device for hydraulic dampers to solve the above problems. Utility Model Content

[0005] To overcome the shortcomings of traditional load testing devices that have a fixed loading direction and only support unidirectional testing, making it difficult to adapt to the mechanical performance evaluation under multidirectional and complex working conditions, this utility model provides a multidirectional load testing device for hydraulic dampers.

[0006] This utility model is achieved through the following technical approach: a multi-directional loading force testing device for a hydraulic damper, comprising a fixed frame, an electric push rod, an electric slide rail, an electric slider, a support plate, a support frame, a locking bolt, a threaded sleeve, a hydraulic damper body, and a control panel. The electric push rod is installed on the upper part of the fixed frame, with its piston rod extending vertically downwards. The electric slide rail is installed at the end of the piston rod of the electric push rod, and an electric slider is slidably mounted on it. A support plate is installed at the lower part of the fixed frame and at the bottom of the electric slider. A support frame is installed on the side of the two support plates that are close to each other. A locking bolt is fixedly connected to each support frame, and a threaded sleeve is threaded at one end of each locking bolt. The hydraulic damper body is placed between two locking bolts, with the threaded sleeve located in front of the hydraulic damper body. The control panel is installed on one side of the fixed frame, and the electric push rod, electric slide rail, and electric slider are all electrically connected to the control panel.

[0007] Furthermore, it also includes a limit frame, a sliding frame, a retaining ring, a fixed ring, and a vibration monitoring module. The limit frame is slidably mounted on the fixed frame, and the sliding frame is slidably mounted on the limit frame. A retaining ring is rotatably mounted on one side of the sliding frame, and the hydraulic damper body is inserted into the retaining ring. The fixed ring is mated to the retaining ring and fits against the surface of the hydraulic damper body. The vibration monitoring module is installed on one side of the fixed ring and is electrically connected to the control panel.

[0008] Furthermore, it also includes magnetic blocks, with a magnetic block embedded at each end of the retaining ring and the fixing ring, and the two longitudinally aligned magnetic blocks attracting each other.

[0009] Furthermore, it also includes a temperature detector, which is installed at the bottom of the fixed ring and fits against the surface of the hydraulic damper body. The temperature detector is electrically connected to the control panel.

[0010] Furthermore, it also includes an infrared transmitter and an infrared receiver. The infrared transmitter is mounted on one of the support frames, and the infrared receiver is mounted on the other support frame and located below the infrared transmitter. Both the infrared transmitter and the infrared receiver are electrically connected to the control panel.

[0011] Furthermore, a rotating rod is provided at one end of the threaded sleeve.

[0012] Beneficial effects: 1. By providing axial loading power through electric push rods and combining the lateral movement functions of electric slide rails and electric sliders, the multi-directional loading capability of the hydraulic damper body can be realized, breaking through the limitation of traditional devices that can only perform unidirectional loading. It supports flexible switching from axial testing to multi-directional composite loading, significantly improving the testing dimensions and working condition simulation capabilities of the device.

[0013] 2. Through the collaborative design of the limiting frame, sliding frame, retaining ring, magnetic block, fixing ring, vibration monitoring module and temperature detector, real-time online monitoring of the vibration characteristics and thermal performance of the hydraulic damper body is realized. The vibration monitoring module can collect key dynamic parameters such as vibration frequency, amplitude and acceleration of the hydraulic damper body, and the temperature detector can simultaneously acquire the temperature rise change of the surface of the hydraulic damper body. The combination of the two provides comprehensive data support for the performance evaluation of the hydraulic damper.

[0014] 3. A through-beam optical path system consisting of an infrared transmitter and an infrared receiver enables continuous monitoring of the motion status of the hydraulic damper. If the hydraulic damper jams, causing the electric push rod piston rod to suddenly stop or its stroke to become abnormal, the control panel will immediately trigger the shutdown protection, effectively preventing damage to the electric push rod and ensuring the safety and reliability of the test process. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a three-dimensional structural diagram of the components of this utility model, including the fixing frame, electric push rod, and limiting frame.

[0017] Figure 3 This is a three-dimensional structural diagram of the components of this utility model, including the electric slide rail, electric slider, and support plate.

[0018] Figure 4 This is a three-dimensional structural diagram of the limiting frame, sliding frame, and retaining ring of this utility model.

[0019] Figure 5 This is a three-dimensional structural diagram of the support plate, support frame, and locking bolts of this utility model.

[0020] Reference numerals: 1. Fixed frame, 2. Electric push rod, 3. Electric slide rail, 4. Electric slider, 5. Support plate, 6. Support frame, 7. Locking bolt, 8. Threaded sleeve, 9. Hydraulic damper body, 10. Limiting frame, 11. Sliding frame, 12. Snap ring, 13. Magnetic block, 14. Fixed ring, 15. Vibration monitoring module, 16. Temperature detector, 17. Infrared transmitter, 18. Infrared receiver, 19. Control panel. Detailed Implementation

[0021] Example: A multi-directional loading force testing device for a hydraulic damper, such as Figures 1-5 As shown, the device includes a fixed frame 1, an electric push rod 2, an electric slide rail 3, an electric slider 4, a support plate 5, a support frame 6, a locking bolt 7, a threaded sleeve 8, a hydraulic damper body 9, and a control panel 19. The electric push rod 2 is bolted to the upper part of the fixed frame 1, and its piston rod extends vertically downward. The electric slide rail 3 is bolted to the end of the piston rod of the electric push rod 2, and an electric slider 4 is slidably mounted on it. A support plate 5 is bolted to the lower part of the fixed frame 1 and the bottom of the electric slider 4. The two support plates 5 are bolted to each other on the side closest to each other. A support frame 6 is provided, and a locking bolt 7 is fixedly connected to each support frame 6. A threaded sleeve 8 is provided at the front end of each locking bolt 7. A slotted rotating rod is provided at the front end of the threaded sleeve 8 for easy turning. The hydraulic damper body 9 is placed between two locking bolts 7. The threaded sleeve 8 is located in front of the hydraulic damper body 9, thereby restricting the hydraulic damper body 9 between the two locking bolts 7. The control panel 19 is bolted to the right side of the fixed frame 1. The electric push rod 2, electric slide rail 3 and electric slider 4 are all electrically connected to the control panel 19.

[0022] like Figures 2-5As shown, it also includes a limit frame 10, a sliding frame 11, a retaining ring 12, a magnetic block 13, a fixed ring 14, a vibration monitoring module 15, and a temperature detector 16. The limit frame 10 is slidably mounted on the fixed frame 1, and the sliding frame 11 is slidably mounted on the limit frame 10. A C-shaped retaining ring 12 is rotatably mounted on the front side of the sliding frame 11. The hydraulic damper body 9 is inserted into the retaining ring 12. The fixed ring 14 is mated to the retaining ring 12 and fits against the surface of the hydraulic damper body 9. The vibration monitoring module 15 is bolted to the front side of the fixed ring 14 and electrically connected to the control panel 19. A magnetic block 13 is fixedly connected to both ends of the retaining ring 12 and the fixed ring 14 in an embedded manner. The two longitudinally aligned magnetic blocks 13 attract each other, thereby fixing the fixed ring 14 to the retaining ring 12 and facilitating the removal of the fixed ring 14 at any time. The temperature detector 16 is bolted to the bottom of the fixed ring 14 and fits against the surface of the hydraulic damper body 9. The temperature detector 16 is electrically connected to the control panel 19.

[0023] like Figure 1 , Figure 3 and Figure 4 As shown, it also includes an infrared transmitter 17 and an infrared receiver 18. The infrared transmitter 17 is bolted to the upper support frame 6, and the infrared receiver 18 is bolted to the lower support frame 6 and located below the infrared transmitter 17. Both the infrared transmitter 17 and the infrared receiver 18 are electrically connected to the control panel 19.

[0024] When this device is in operation, firstly, the fixing ring 14 is pulled off the retaining ring 12, so that the fixing ring 14 and the corresponding magnetic block 13 at the end of the retaining ring 12 are no longer attracted. Then, the upper and lower threaded sleeves 8 are unscrewed, and the hydraulic damper body 9 to be tested is placed vertically between the upper and lower locking bolts 7. During the placement process, the hydraulic damper body 9 is simultaneously locked into the retaining ring 12 to achieve radial positioning. After that, the upper and lower threaded sleeves 8 are screwed back on to restrict the hydraulic damper body 9 between the upper and lower locking bolts 7, preventing the hydraulic damper body 9 from coming off during the test. Then, the fixing ring 14 is installed, so that the fixing ring 14 and the corresponding magnetic block 13 at the end of the retaining ring 12 are automatically attracted under the action of magnetic force to achieve rapid locking and ensure that the vibration monitoring module 15 and the temperature detector 16 are in contact with the surface of the hydraulic damper body 9. After the test begins, the control panel 19 issues a command to control the piston rod of the electric push rod 2 to reciprocate and extend. When the piston rod of the electric push rod 2 extends and retracts, it drives the electric slide rail 3, electric slider 4, upper support plate 5 and upper support frame 6 to move synchronously, thereby applying axial compression and rebound loads to the upper end of the hydraulic damper body 9, simulating its typical stress process in actual working conditions. In this stage, only vertical loading is applied to evaluate the mechanical performance of the hydraulic damper body 9 under standard working conditions, such as the magnitude of damping force, response frequency, energy dissipation capacity, etc. During the test, as the upper support frame 6 reciprocates, the relative distance between the infrared transmitter 17 and the infrared receiver 18 changes. However, since the two remain aligned, the optical path remains open and unobstructed. Based on this, the system judges that the hydraulic damper body 9 is in a normal reciprocating motion state. Once the hydraulic damper body 9 jams, causing the piston rod of the electric push rod 2 to suddenly stop or its stroke to be abnormal, the on / off state of the optical path will deviate from the original periodic change pattern, resulting in signal interruption or disorder. The control panel 19 monitors the optical path signal in real time. Once it identifies an abnormal signal that matches the jamming characteristics, it immediately triggers the shutdown protection mechanism to quickly cut off the power output of the electric push rod 2, effectively preventing damage to the electric push rod 2 and ensuring the safety and reliability of the test process. Meanwhile, the vibration monitoring module 15 collects dynamic response parameters such as vibration frequency, amplitude, and acceleration of the hydraulic damper body 9 in real time, and the temperature detector 16 monitors the temperature change of its outer shell surface in real time to evaluate the internal friction heat generation and heat dissipation performance. All monitoring data are transmitted to the control panel 19 through signal lines to realize real-time display, storage and analysis of data. After the axial loading test is completed, the system enters the multi-directional loading mode. At this time, the control panel 19 further instructs the electric slide rail 3 to start and controls the electric slider 4 to move horizontally, so that the support plate 5 and the upper support frame 6 will shift laterally, thereby changing the direction of the force relative to the axis of the hydraulic damper body 9, realizing multi-directional dynamic loading. By adjusting the lateral displacement, the composite force state under multiple directions can be simulated to meet the multi-directional mechanical performance evaluation requirements under complex working conditions. During multi-directional loading, the hydraulic damper body 9 rotates. At this time, the sliding frame 11 can slide laterally on the limiting frame 10, and the limiting frame 10 can slide longitudinally on the fixed frame 1, forming a two-stage floating adjustment structure. This effectively releases the constraint stress caused by asymmetrical force or installation deviation, avoids measurement errors or structural damage caused by rigid connection, and ensures the stability of the test process. After the test, the piston rod of the electric push rod 2 and the electric slider 4 were reset to their initial positions, and the hydraulic damper body 9 was removed, thus completing the test procedure.

Claims

1. A multi-directional loading force testing device for a hydraulic damper, characterized in that, The system includes a fixed frame (1), an electric push rod (2), an electric slide rail (3), an electric slider (4), a support plate (5), a support frame (6), a locking bolt (7), a threaded sleeve (8), a hydraulic damper body (9), and a control panel (19). The electric push rod (2) is installed on the upper part of the fixed frame (1), with its piston rod extending vertically downwards. The electric slide rail (3) is installed at the end of the piston rod of the electric push rod (2), and an electric slider (4) is slidably mounted on it. A support plate is installed at the bottom of both the fixed frame (1) and the bottom of the electric slider (4). 5) A support frame (6) is installed on one side of the two support plates (5) that are close to each other. A locking bolt (7) is fixed on each support frame (6). A threaded sleeve (8) is threaded on one end of each locking bolt (7). The hydraulic damper body (9) is placed between the two locking bolts (7). The threaded sleeve (8) is located in front of the hydraulic damper body (9). The control panel (19) is installed on one side of the fixed frame (1). The electric push rod (2), electric slide rail (3) and electric slider (4) are all electrically connected to the control panel (19).

2. The multi-directional loading force testing device for a hydraulic damper according to claim 1, characterized in that, It also includes a limit frame (10), a sliding frame (11), a retaining ring (12), a fixed ring (14) and a vibration monitoring module (15). The limit frame (10) is slidably mounted on the fixed frame (1), and the sliding frame (11) is slidably mounted on the limit frame (10). A retaining ring (12) is rotatably mounted on one side of the sliding frame (11). The hydraulic damper body (9) is inserted into the retaining ring (12). The fixed ring (14) is mated to the retaining ring (12) and fits against the surface of the hydraulic damper body (9). The vibration monitoring module (15) is mounted on one side of the fixed ring (14) and is electrically connected to the control panel (19).

3. The multi-directional loading force testing device for a hydraulic damper according to claim 2, characterized in that, It also includes a magnetic block (13), and a magnetic block (13) is fixedly attached to both ends of the retaining ring (12) and the fixing ring (14) in an embedded manner. The two magnetic blocks (13) aligned longitudinally attract each other.

4. The multi-directional loading force testing device for a hydraulic damper according to claim 3, characterized in that, It also includes a temperature detector (16), which is installed at the bottom of the fixed ring (14) and fits against the surface of the hydraulic damper body (9). The temperature detector (16) is electrically connected to the control panel (19).

5. The multi-directional loading force testing device for a hydraulic damper according to claim 4, characterized in that, It also includes an infrared transmitter (17) and an infrared receiver (18). The infrared transmitter (17) is mounted on one of the support frames (6), and the infrared receiver (18) is mounted on the other support frame (6) and located below the infrared transmitter (17). Both the infrared transmitter (17) and the infrared receiver (18) are electrically connected to the control panel (19).

6. The multi-directional loading force testing device for a hydraulic damper according to claim 5, characterized in that, A rotating rod is provided at one end of the threaded sleeve (8).

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