A test device and method for dynamic and static performance of hydraulic dampers

Abstract

This invention belongs to the field of damper testing technology, specifically a device and method for testing the dynamic and static performance of hydraulic dampers. The invention includes: a testing machine base with a vertically mounted frame fixedly connected to it; a testing component slidably connected to the frame; a cylinder frame and a support frame fixedly connected to the upper and lower ends of the frame, respectively; a hydraulic cylinder fixedly mounted on the cylinder frame; and a laser displacement sensor mounted on the support frame. The testing component includes a slide block slidably connected to a slide rail, a test seat movably connected to the slide block, and a drive motor fixedly mounted on the slide block. A cam for driving the test seat to reciprocate is fixedly connected to the drive motor shaft. A locking cylinder is mounted on the slide block, and a locking frame is fixedly connected to the piston rod of the locking cylinder. This invention's testing component, with its test seat, locking frame, drive motor, and cam, can test the dynamic and static performance of hydraulic dampers, providing comprehensive and accurate test data.

Description

Technical Field

[0001] This invention relates to the field of damper testing technology, and in particular to a device and method for testing the dynamic and static performance of hydraulic dampers. Background Technology

[0002] A damper is a device that uses damping characteristics to reduce mechanical vibration and dissipate kinetic energy. It is widely used in various equipment, such as the chassis of robots. The damping force-velocity curve and the damping force-displacement curve are important parameter curves that reflect the performance of the damper. Understanding these curves can provide a reference for how to adjust the damper when decelerating the robot.

[0003] Existing hydraulic damper test benches typically consist of a base, mounting beam, control panel, and servo motor. Operators fix the hydraulic damper to the mounting beam, then activate the servo motor to apply pressure to the damper. The damper displaces under the servo motor's action, thus performing performance tests. However, this testing method is conducted under relatively stable conditions, making the test rather simplistic. In actual use, hydraulic dampers are often subjected to repeated vibrations and impacts, as well as pressure from different angles and directions. This testing method cannot effectively measure the true performance data of hydraulic dampers under various vibration environments. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a testing device and method for the dynamic and static performance of hydraulic dampers. The testing components enable the testing of the dynamic and static performance of hydraulic dampers, aiming to solve the problems in the background technology.

[0005] To achieve the above technical objectives, the specific technical solution of the present invention is as follows: The present invention proposes a hydraulic damper dynamic and static performance testing device, comprising: a testing machine base, on which a vertically arranged frame is fixedly connected; a testing component is slidably connected to the frame, and a slide rail is provided on the surface of the frame for slidably connecting with the testing component; a cylinder frame and a support frame are fixedly connected to the upper and lower ends of the frame respectively, a hydraulic cylinder is fixedly installed on the cylinder frame for driving the testing component to move, a hydraulic damper is installed between the testing component and the support frame, and a laser displacement sensor is installed on the support frame; the testing component includes a slide block slidably connected to the slide rail, a testing seat is movably connected to the slide block, and a drive motor is fixedly installed on the slide block, a cam for driving the testing seat to reciprocate is fixedly connected to the drive motor shaft; a locking cylinder is installed on the slide block, and a locking frame is fixedly connected to the piston rod of the locking cylinder for locking and fixing the testing seat.

[0006] Furthermore, a force sensor is fixedly connected to the test base, and a vibration base is fixedly connected to the force sensor.

[0007] Furthermore, a locking block is fixedly connected to the locking frame, and locking grooves that cooperate with the locking block are provided on both sides of the vibration seat; and an inclined rail is fixedly connected to the test seat, and a pressure rod that slides with the inclined rail is fixedly connected to the locking frame.

[0008] Furthermore, a pair of side plates are symmetrically fixedly connected to the slide, and a fixed plate is fixedly connected between the two side plates. The test seat is movably connected to the fixed plate, and a slide rod that is slidably connected to the test seat is fixedly connected to the fixed plate.

[0009] Furthermore, the side plate is provided with vertical sliding holes, and the locking frame is fixedly connected to sliders that slide in connection with the sliding holes at both ends; and a motor frame is fixedly connected between the two side plates, and the locking cylinder and the drive motor are both mounted on the motor frame.

[0010] Furthermore, a bearing seat is fixedly installed on the surface of the support frame, a rotating seat is rotatably connected to the bearing seat, a moving block is slidably connected to the surface of the rotating seat, a first hinge seat is connected to the moving block, and a second hinge seat is rotatably connected to the surface of the test seat.

[0011] Furthermore, the surface of the rotating seat is provided with a sliding groove, the moving block is slidably connected to the sliding groove, and a threaded rod is rotatably connected inside the sliding groove, with the moving block and the threaded rod being threadedly connected.

[0012] Furthermore, a rotary motor is mounted on the support frame, a worm gear is fixedly connected to the shaft of the rotary motor, and a worm wheel that meshes with the worm gear is coaxially fixedly connected to the rotating seat.

[0013] A method for testing the dynamic and static performance of a hydraulic damper includes the following two test modes:

[0014] Dynamic test: The hydraulic damper is installed between the test component and the support frame. The locking frame is moved by the locking cylinder. The locking frame is released from the test seat. The hydraulic cylinder pushes the test component down to the designated position. Then the drive motor drives the cam to rotate, causing the test seat to vibrate back and forth, thus testing the dynamic performance of the hydraulic damper.

[0015] Static test: The hydraulic damper is installed between the test assembly and the support frame. The locking frame is moved by the locking cylinder and locked to the test seat. Then, the test assembly is pushed down by the hydraulic cylinder to apply pressure to the hydraulic damper and test the static performance of the hydraulic damper.

[0016] The beneficial effects of this invention are as follows:

[0017] 1. The test assembly of this invention has a structure including a test seat, a locking frame, a drive motor, and a cam. When the locking frame locks the test seat, the static performance of the hydraulic damper can be tested; when the locking frame is released from the test seat, the cam is driven by the drive motor to rotate, and the dynamic performance of the hydraulic damper can be tested, providing comprehensive test data.

[0018] 2. The present invention has a movable block slidably connected to a rotating seat, and a first hinge seat is installed on the movable block. By rotating the threaded rod, the movable block can be moved, and the rotating motor drives the rotating seat to rotate, thereby changing the force direction of the hydraulic damper and testing the force direction of the hydraulic damper at different angles. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a hydraulic damper dynamic and static performance testing device proposed in this invention.

[0020] Figure 2 This is a schematic diagram of the structure of the test component proposed in this invention.

[0021] Figure 3 This is another schematic diagram of the test component proposed in this invention.

[0022] Figure 4 This is a schematic diagram of the test stand proposed in this invention.

[0023] Figure 5 This is a schematic diagram of the locking frame proposed in this invention.

[0024] Figure 6 This is a schematic diagram of the support frame proposed in this invention.

[0025] Figure 7 This is a schematic diagram of the support frame proposed in this invention from another angle.

[0026] The corresponding names of the attached figures are as follows:

[0027] 100. Testing equipment;

[0028] 200. Frame; 201. Slide rail;

[0029] 300. Support frame; 301. Shaft seat; 302. Rotary seat; 303. Moving block; 304. First hinge seat; 305. Slide groove; 306. Threaded rod; 307. Rotary motor; 308. Worm gear; 309. Worm wheel;

[0030] 400. Cylinder bracket;

[0031] 500. Test assembly; 501. Slide; 502. Test seat; 503. Locking frame; 504. Locking cylinder; 505. Drive motor; 506. Cam; 507. Side plate; 508. Sliding hole; 509. Fixing plate; 510. Slide rod; 511. Motor frame; 5021. Second hinge; 5022. Vibration seat; 5023. Force sensor; 5024. Locking groove; 5025. Inclined rail; 5031. Slider; 5032. Locking block; 5033. Pressure rod;

[0032] 600. Hydraulic cylinder;

[0033] 700. Laser displacement sensor. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0035] Example 1: This example discloses a testing device for the dynamic and static performance of a hydraulic damper, such as... Figures 1-7 As shown, the system includes: a testing platform 100, on which a vertically arranged frame 200 is fixedly connected by bolts; a testing component 500 is slidably connected to the frame 200, and a slide rail 201 is provided on the surface of the frame 200 to slidably connect with the testing component 500; a cylinder frame 400 and a support frame 300 are fixedly connected to the upper and lower ends of the frame 200, respectively; a hydraulic cylinder 600 is fixedly installed on the cylinder frame 400 to drive the testing component 500 to move; during testing, a hydraulic damper is installed between the testing component 500 and the support frame 300. Between 0 and 0, a laser displacement sensor 700 is installed on the support frame 300 to record the displacement and vibration response of the hydraulic damper piston rod. The laser displacement sensor 700 uses the test seat 502 as a reference. The test component 500 is driven to descend by the hydraulic cylinder 600, which continuously applies pressure to the hydraulic damper. As the pressure increases, the damper cylinder is observed to see if there are any deformations, cracks, or oil leaks. By recording the displacement and pressure of the hydraulic damper piston rod, as well as the output force and displacement curve, its static performance is tested.

[0036] like Figures 2-4As shown, the test assembly 500 includes a slide block 501 slidably connected to the slide rail 201, a piston rod of a hydraulic cylinder 600 fixedly connected to the slide block 501, a pair of side plates 507 symmetrically fixedly connected to the slide block 501 by bolts, a fixing plate 509 welded between the two side plates 507, a test seat 502 movably connected to the fixing plate 509, and a second hinge seat 5021 rotatably connected to the side of the test seat 502 facing the support frame 300. During the test, the piston rod of the hydraulic damper is hinged to the second hinge seat 5021 by a pin, and a slide rod 510 slidably connected to the test seat 502 is fixedly connected to the fixing plate 509. The end of the slide rod 510 is provided with a stop to prevent the test seat 502 from detaching from the slide rod 510. A force sensor 5023 is fixedly connected to the test seat 502 for recording the force on the hydraulic damper, and a vibration seat 5022 is fixedly connected to the force sensor 5023.

[0037] A motor frame 511 is fixedly connected between the two side plates 507. A locking cylinder 504 and a drive motor 505 are fixedly installed on the motor frame 511. A cam 506 for driving the test seat 502 to reciprocate is fixedly connected to the shaft of the drive motor 505. The high-speed rotation of the cam 506 continuously impacts the vibrating seat 5022, causing the test seat 502 to reciprocate. A locking frame 503 is fixedly connected to the piston rod of the locking cylinder 504. When the hydraulic damper is statically tested, the locking frame 503 is moved by the locking cylinder 504. The locking frame 503 locks the test seat 502, thereby fixing the test seat 502 on the slide 501. At this time, when the hydraulic cylinder 600 pushes the slide 501 to move, it drives the test seat 502 to move together.

[0038] like Figure 4-5 As shown, the side plate 507 is provided with a vertical sliding hole 508, and the locking frame 503 is fixedly connected to two ends with sliders 5031 that are slidably connected to the sliding hole 508; the locking frame 503 is fixedly connected with a locking block 5032, which has an inverted U-shaped structure; the vibrating seat 5022 is provided with locking grooves 5024 on both sides that cooperate with the locking block 5032; and the test seat 502 is fixedly connected with an inclined rail 5025, and the locking frame 503 is fixedly connected with a pressure rod 5033 that is slidably cooperated with the inclined rail 5025. Through the cooperation of the pressure rod 5033 and the inclined rail 5025, the vibrating seat 5022 can be moved to the locking position in advance so that the locking block 5032 locks the vibrating seat 5022.

[0039] In specific implementation: During the static performance test of the hydraulic damper, the locking cylinder 504 first drives the locking frame 503 to move closer to the slide block 501. The pressure rod 5033 first contacts the inclined rail 5025. As the pressure rod 5033 moves, it first drives the test seat 502 to slide along the slide rod 510 to one end close to the fixed plate 509, thereby moving the vibration seat 5022 to the locking position. When the locking frame 503 continues to move, the pressure rod 5033 separates from the end of the inclined rail 5025. As the locking frame 503 moves, the locking block 5032 inserts into the locking groove 5024 on the vibration seat 5022, locking the vibration seat 5022, thereby locking and fixing the test seat 502 onto the slide block 501. At this time, when the hydraulic cylinder 600 drives the slide block 501 to move, the slide block 501 can drive the test seat 502 to move together, continuously increasing the pressure on the hydraulic damper. Under high pressure, the displacement of the hydraulic damper piston rod is recorded by a laser displacement sensor 700, and the force sensor records the magnitude of the force on the hydraulic damper to test its static performance. Similarly, when testing the dynamic performance of the hydraulic damper, the locking cylinder 504 drives the locking frame 503 to move away from the slide 501, and the locking block 5032 separates from the vibration seat 5022, making the test seat 502 in an active state. Then, the hydraulic cylinder 600 drives the test component 500 to move to the designated position, and the drive motor 505 drives the cam 506 to rotate at high speed, continuously impacting the vibration seat 5022, causing the test seat 502 to vibrate back and forth, and thus causing the hydraulic damper to vibrate. The laser displacement sensor 700 records the vibration response of the hydraulic damper, and the force sensor records the magnitude of the force on the hydraulic damper to test its dynamic performance.

[0040] Example 2: Based on the structure of Example 1, the difference lies in that, to test the performance of the hydraulic damper under forces of different angles and directions, this example uses a bearing seat 301 fixedly mounted on the surface of the support frame 300. A rotating seat 302 is rotatably connected to the bearing seat 301. The center of the rotating seat 302 is on the same horizontal line as the center of the test seat 502. A moving block 303 is slidably connected to the surface of the rotating seat 302. A groove 305 is provided on the surface of the rotating seat 302, which is slidably connected to the moving block 303. The groove 305 passes through the center of the rotating seat 302, and a threaded rod 306 is rotatably connected inside the groove 305. The moving block 303 and... The threaded rod 306 is threaded, and a first hinge seat 304 is fixedly connected to the moving block 303. During testing, one end of the hydraulic damper cylinder is hinged to the first hinge seat 304 via a pin. A rotary motor 307 is mounted on the support frame 300, and a worm gear 308 is fixedly connected to the shaft of the rotary motor 307. A worm wheel 309, meshing with the worm gear 308, is coaxially fixedly connected to the rotating seat 302. The rotary motor 307 drives the worm gear 308 to rotate, which in turn drives the worm wheel 309 to rotate, thereby driving the rotating seat 302 to rotate, thus changing the up, down, left, and right positions of the first hinge seat 304. The up, down, left, and right positions refer to the attached... Figure 7 The position of the hydraulic damper is determined by rotating the threaded rod 306, which can drive the moving block 303 to slide in the slide groove 305, changing the distance between the center of the first hinge seat 304 and the center of the rotating seat 302, thereby changing the force angle of the hydraulic damper. This can more realistically simulate the force condition of the hydraulic damper in actual use, making the test of the hydraulic damper more comprehensive.

[0041] This embodiment also discloses a method for testing the dynamic and static performance of a hydraulic damper, based on the structure of Embodiment 1 or Embodiment 2 above, including the following two test modes:

[0042] Dynamic test: The hydraulic damper is installed between the test assembly 500 and the support frame 300. The two ends of the hydraulic damper are hinged to the first hinge seat 304 and the second hinge seat 5021 respectively. The locking frame 503 is moved by the locking cylinder 504 and the locking frame 503 is released from the test seat 502. The hydraulic cylinder 600 pushes the test assembly 500 down to the designated position. Then the drive motor 505 drives the cam 506 to rotate, which drives the test seat 502 to vibrate back and forth to test the dynamic performance of the hydraulic damper.

[0043] Static test: The hydraulic damper is installed between the test assembly 500 and the support frame 300. The two ends of the hydraulic damper are hinged to the first hinge seat 304 and the second hinge seat 5021, respectively. The locking frame 503 is moved by the locking cylinder 504 and locked and fixed to the test seat 502. Then, the test assembly 500 is pushed down by the hydraulic cylinder 600 to apply pressure to the hydraulic damper and test the static performance of the hydraulic damper.

[0044] Finally, it should be noted that in the description of this invention, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for testing the dynamic and static performance of a hydraulic damper, characterized in that, include: A test machine (100) is fixedly connected to a vertically arranged frame (200); a test component (500) is slidably connected to the frame (200), and a slide rail (201) is provided on the surface of the frame (200) to slidably connect with the test component (500). The upper and lower ends of the frame (200) are respectively fixedly connected to the cylinder frame (400) and the support frame (300). A hydraulic cylinder (600) is fixedly installed on the cylinder frame (400) to drive the test component (500) to move. A hydraulic damper is installed between the test component (500) and the support frame (300). A laser displacement sensor (700) is installed on the support frame (300). The test assembly (500) includes a slide block (501) slidably connected to a slide rail (201), a test seat (502) movably connected to the slide block (501), and a drive motor (505) fixedly mounted on the slide block (501). A cam (506) for driving the test seat (502) to reciprocate is fixedly connected to the shaft of the drive motor (505). A locking cylinder (504) is mounted on the slide block (501), and a locking frame (503) is fixedly connected to the piston rod of the locking cylinder (504) for locking and fixing the test seat (502). A force sensor (5023) is fixedly connected to the test seat (502), and a vibration seat (5022) is fixedly connected to the force sensor (5023). A locking block (5032) is fixedly connected to the locking frame (503), and locking grooves (5024) that cooperate with the locking block (5032) are provided on both sides of the vibration seat (5022); and an inclined rail (5025) is fixedly connected to the test seat (502), and a pressure rod (5033) that slides with the inclined rail (5025) is fixedly connected to the locking frame (503). The support frame (300) is fixedly mounted with a bearing seat (301), a rotating seat (302) is rotatably connected to the bearing seat (301), a moving block (303) is slidably connected to the surface of the rotating seat (302), a first hinge seat (304) is connected to the moving block (303), and a second hinge seat (5021) is rotatably connected to the surface of the test seat. The rotating seat (302) has a sliding groove (305) on its surface. The moving block (303) is slidably connected to the sliding groove (305), and a threaded rod (306) is rotatably connected inside the sliding groove (305). The moving block (303) is threadedly connected to the threaded rod (306). A rotary motor (307) is installed on the support frame (300), and a worm gear (308) is fixedly connected to the shaft of the rotary motor (307). A worm wheel (309) that meshes with the worm gear (308) is coaxially fixedly connected to the rotating seat (302).

2. The hydraulic damper dynamic and static performance testing equipment according to claim 1, characterized in that, A pair of side plates (507) are symmetrically fixedly connected to the slide (501), and a fixed plate (509) is fixedly connected between the two side plates (507). The test seat (502) is movably connected to the fixed plate (509), and a slide rod (510) that is slidably connected to the test seat (502) is fixedly connected to the fixed plate (509).

3. The hydraulic damper dynamic and static performance testing equipment according to claim 2, characterized in that, The side plate (507) is provided with a vertical sliding hole (508), and the locking frame (503) is fixedly connected at both ends with a slider (5031) that is slidably connected to the sliding hole (508); and a motor frame (511) is fixedly connected between the two side plates (507), and the locking cylinder (504) and the drive motor (505) are both mounted on the motor frame.

4. A method for testing the dynamic and static performance of a hydraulic damper, utilizing the dynamic and static performance testing equipment for a hydraulic damper as described in claim 3, characterized in that... include: Dynamic test: The hydraulic damper is installed between the test assembly (500) and the support frame (300). The two ends of the hydraulic damper are hinged to the first hinge seat (304) and the second hinge seat (5021) respectively. The locking frame (503) is moved by the locking cylinder (504). The locking frame (503) is released from the test seat (502). The hydraulic cylinder (600) pushes the test assembly (500) down to the designated position. Then the drive motor (505) drives the cam (506) to rotate, causing the test seat (502) to vibrate back and forth, and the dynamic performance of the hydraulic damper is tested. Static test: The hydraulic damper is installed between the test assembly (500) and the support frame (300). The two ends of the hydraulic damper are hinged to the first hinge seat (304) and the second hinge seat (5021) respectively. The locking frame (503) is moved by the locking cylinder (504) and the locking frame (503) locks and fixes the test seat (502). Then, the test assembly (500) is pushed down by the hydraulic cylinder (600) to apply pressure to the hydraulic damper and test the static performance of the hydraulic damper.

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