Device and method for testing dynamic and static performance of hydraulic damper

Abstract

The invention belongs to the technical field of damper testing, and particularly relates to hydraulic damper dynamic and static performance testing equipment and method.The hydraulic damper dynamic and static performance testing equipment comprises a testing machine table, and a vertically-arranged rack is fixedly connected to the testing machine table; the rack is slidably connected with a test assembly. An air cylinder frame and a supporting frame are fixedly connected to the upper end and the lower end of the rack respectively, a hydraulic cylinder is fixedly installed on the air cylinder frame, and a laser displacement sensor is installed on the supporting frame. The testing assembly comprises a sliding seat in sliding connection with the sliding rail, a testing seat is movably connected to the sliding seat, a driving motor is fixedly installed on the sliding seat, and a cam used for driving the testing seat to vibrate in a reciprocating mode is fixedly connected to a rotating shaft of the driving motor; a locking air cylinder is installed on the sliding seat, and a piston rod of the locking air cylinder is fixedly connected with a locking frame. According to the testing assembly, the testing seat, the locking frame, the driving motor, the cam and other structures are arranged, the dynamic performance and the static performance of the hydraulic damper can be tested, and testing data are comprehensive and real.

Description

Technical Field

[0001] The present invention relates to the technical field of damper testing, and in particular to a dynamic and static performance testing device and method for a hydraulic damper. Background Art

[0002] A damper is a device that uses damping properties to reduce mechanical vibration and dissipate kinetic energy. It is widely used in various equipment, such as robot chassis. The damping force-velocity curve and the damping force-displacement curve are key parameters that reflect damper performance. Understanding these curves provides a reference for subsequent adjustments when slowing down a robot.

[0003] Existing hydraulic damper test benches usually consist of a base, a mounting beam, a control panel, and a server. Workers fix the hydraulic damper to the mounting beam and then start the servo to apply pressure to the hydraulic damper. The damper moves under the action of the servo, thereby testing the damper's performance. However, this test method is performed in a relatively stable state and the test is relatively simple. In actual use, hydraulic dampers are mostly subjected to repeated vibration and impact, as well as pressure at different angles and directions. This test method cannot effectively test the actual data of the hydraulic damper working in various vibration environments. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides a hydraulic damper dynamic and static performance testing device and method, which can test the dynamic and static performance of the hydraulic damper through the test assembly, aiming to solve the problems in the background technology.

[0005] In order to achieve the above technical objectives, the specific technical scheme of the present invention is as follows: a hydraulic damper dynamic and static performance testing device proposed by the present invention comprises: a test machine platform, a vertically arranged frame is fixedly connected to the test machine platform; a test assembly is slidably connected to the frame, and a slide rail slidably connected to the test assembly is provided on the surface of the frame; 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 test assembly to move, the hydraulic damper is installed between the test assembly and the support frame, and a laser displacement sensor is installed on the support frame; the test assembly comprises a slide slidably connected to the slide rail, a test seat is movably connected to the slide, and a drive motor is fixedly installed on the slide, and a cam for driving the test seat to vibrate reciprocally is fixedly connected to the driving motor shaft; a locking cylinder is installed on the slide, and the locking cylinder piston rod is fixedly connected to the locking frame for locking the test seat.

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

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

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

[0009] Furthermore, the side panels are provided with vertical sliding holes, and both ends of the locking frame are fixedly connected with sliders slidably connected to the sliding holes; and a motor frame is fixedly connected between the two side panels, and the locking cylinder and the drive motor are both installed on the motor frame.

[0010] Furthermore, an axle seat is fixedly installed on the surface of the support frame, a rotating seat is rotatably connected to the axle 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, a sliding groove is provided on the surface of the rotating seat, the moving block is slidably connected to the sliding groove, and a threaded rod is rotatably connected in the sliding groove, and the moving block is threadedly connected to the threaded rod.

[0012] Furthermore, a rotating motor is mounted on the support frame, a worm is fixedly connected to the rotating shaft of the rotating motor, and a worm wheel meshing with the worm is coaxially fixedly connected to the rotating seat; A method for testing the dynamic and static performance of a hydraulic damper includes the following two test modes: Dynamic test: The hydraulic damper is installed between the test assembly and the support frame. The locking frame is driven by the locking cylinder to move. The locking frame releases the test seat. The hydraulic cylinder pushes the test assembly down to the specified position. The drive motor then drives the cam to rotate, driving the test seat to vibrate back and forth to test the dynamic performance of the hydraulic damper. Static test: Install the hydraulic damper between the test assembly and the support frame, and use the locking cylinder to drive the locking frame to move. The locking frame locks the test seat, and then pushes the test assembly down through the hydraulic cylinder to apply pressure to the hydraulic damper to test the static performance of the hydraulic damper.

[0013] The beneficial effects of the present invention are: 1. The test assembly of the present invention is provided with 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 releases the test seat, the cam is driven by the drive motor to rotate, and the dynamic performance of the hydraulic damper can be tested, and the test data is relatively comprehensive.

[0014] 2. The present invention has a moving block slidably connected to a rotating seat, and a first hinge seat is installed on the moving block. The moving block can be driven to move by rotating the threaded rod, and the rotating motor drives the rotating seat to rotate, thereby changing the force direction of the hydraulic damper and testing the force directions of the hydraulic damper at different angles. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of a hydraulic damper dynamic and static performance testing device proposed by the present invention.

[0016] Figure 2 This is a schematic diagram of the structure of the test component proposed in the present invention.

[0017] Figure 3 This is a schematic diagram from another angle of the test assembly proposed by the present invention.

[0018] Figure 4 This is a schematic structural diagram of the test socket proposed in the present invention.

[0019] Figure 5 This is a structural diagram of the locking frame proposed in the present invention.

[0020] Figure 6 This is a schematic structural diagram of the support frame proposed in the present invention.

[0021] Figure 7 This is a schematic diagram of the support frame proposed by the present invention from another angle.

[0022] The corresponding names of the reference numerals in the figures are as follows: 100. Testing machine; 200, rack; 201, slide rail; 300, support frame; 301, shaft seat; 302, rotating seat; 303, moving block; 304, first hinge seat; 305, slide groove; 306, threaded rod; 307, rotating motor; 308, worm; 309, worm wheel; 400, cylinder frame; 500, test assembly; 501, slide; 502, test seat; 503, locking frame; 504, locking cylinder; 505, drive motor; 506, cam; 507, side plate; 508, slide hole; 509, fixed plate; 510, slide rod; 511, motor frame; 5021, second hinge seat; 5022, vibration seat; 5023, force sensor; 5024, locking groove; 5025, ramp; 5031, slide; 5032, locking block; 5033, pressure rod; 600, hydraulic cylinder; 700. Laser displacement sensor. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] Example 1: This example discloses a hydraulic damper dynamic and static performance testing device, such as Figure 1-Figure 7 As shown, it includes: a test machine 100, a vertically arranged frame 200 is fixedly connected to the test machine 100 by bolts; a test assembly 500 is slidably connected to the frame 200, and a slide rail 201 is provided on the surface of the frame 200 for sliding connection with the test assembly 500; the upper and lower ends of the frame 200 are respectively fixedly connected to a cylinder frame 400 and a support frame 300, and a hydraulic cylinder 600 is fixedly installed on the cylinder frame 400 for driving the test assembly 500 to move. During the test, the hydraulic damper is installed between the test assembly 500 and the support frame 300. 00, wherein a laser displacement sensor 700 is installed on the support frame 300, which is used to record the displacement and vibration response of the hydraulic damper piston rod, wherein the laser displacement sensor 700 uses the test seat 502 as a reference; the test assembly 500 is driven down by the hydraulic cylinder 600, and the hydraulic damper is continuously pressurized, and the pressure is continuously increased to observe whether the damper cylinder has deformation, cracks, oil leakage, etc., and its static performance is tested by recording the displacement and pressure of the hydraulic damper piston rod, the output force and displacement curve.

[0025] like Figure 2-Figure 4 As shown, the test assembly 500 includes a slide 501 that is slidably connected to the slide rail 201, the piston rod of the hydraulic cylinder 600 is fixedly connected to the slide 501, a pair of side plates 507 are symmetrically fixedly connected to the slide 501 by bolts, a fixed plate 509 is welded between the two side plates 507, a test seat 502 is movably connected to the fixed plate 509, and the test seat 502 is rotatably connected to the side of the support frame 300 with a second hinge seat 5021. During testing, the hydraulic damper piston rod is hinged to the second hinge seat 5021 through a pin shaft, and a slide rod 510 that is slidably connected to the test seat 502 is fixedly connected to the fixed plate 509, and a stop portion is provided at the end of the slide rod 510 to prevent the test seat 502 from detaching from the slide rod 510; wherein, a force sensor 5023 is fixedly connected to the test seat 502 for recording the force applied to the hydraulic damper, and a vibration seat 5022 is fixedly connected to the force sensor 5023.

[0026] A motor frame 511 is fixedly connected between the two side plates 507, and a locking cylinder 504 and a driving motor 505 are fixedly installed on the motor frame 511, wherein a cam 506 for driving the test seat 502 to vibrate back and forth is fixedly connected to the rotating shaft of the driving motor 505. Through the high-speed rotation of the cam 506, the vibration seat 5022 is continuously impacted, driving the test seat 502 to vibrate back and forth; the piston rod of the locking cylinder 504 is fixedly connected to the locking frame 503. When the hydraulic damper is statically tested, the locking frame 503 is driven to move by the locking cylinder 504, and the locking frame 503 locks and fixes 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.

[0027] like Figure 4-5 As shown, a vertical sliding hole 508 is provided on the side plate 507, and sliders 5031 slidably connected to the sliding holes 508 are fixedly connected at both ends of the locking frame 503; a locking block 5032 is fixedly connected to the locking frame 503, and the locking block 5032 is an inverted U-shaped structure, and locking grooves 5024 cooperating with the locking block 5032 are provided on both sides of the vibration seat 5022; and an inclined inclined rail 5025 is fixedly connected to the test seat 502, and a pressure rod 5033 slidably cooperating with the inclined rail 5025 is fixedly connected to the locking frame 503. Through the cooperation between the pressure rod 5033 and the inclined rail 5025, the vibration seat 5022 can be driven to move to the locking position in advance so that the locking block 5032 locks the vibration seat 5022.

[0028] When the hydraulic damper is in static performance test, the locking frame 503 is first driven by the locking cylinder 504 to move toward the direction of the slide 501, and the pressure rod 5033 first contacts the inclined rail 5025. As the pressure rod 5033 moves, the test seat 502 is first driven 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 is separated from the end of the inclined rail 5025. As the locking frame 503 moves, the locking block 5032 is inserted into the locking groove 5024 on the vibration seat 5022, locking the vibration seat 5022, thereby locking the test seat 502 on the slide 501. At this time, when the hydraulic cylinder 600 drives the slide 501 to move, the slide 501 can drive the test seat 502 to move together, continuously increasing the pressure on the hydraulic damper. Under high pressure, the laser displacement sensor 700 records the displacement of the hydraulic damper piston rod, and the force sensor records the force on the hydraulic damper, so as to test the static performance of the hydraulic damper; 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 is separated from the vibration seat 5022, so that the test seat 502 is in an active state, and then the hydraulic cylinder 600 drives the test assembly 500 to move to the specified position, and the driving motor 505 drives the cam 506 to rotate at a high speed, continuously impacting the vibration seat 5022, driving the test seat 502 to vibrate back and forth, and then driving the hydraulic damper to vibrate, and the laser displacement sensor 700 records the vibration response of the hydraulic damper and the force sensor records the force on the hydraulic damper to test the dynamic performance of the hydraulic damper.

[0029] Example 2: Based on the structure of the above-mentioned example 1, the difference is that, in order to test the performance of the hydraulic damper when subjected to forces at different angles and directions, this example is achieved by fixing an axle seat 301 on the surface of the support frame 300, and a rotating seat 302 is rotatably connected to the axle 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 slide 305 is provided on the surface of the rotating seat 302 that is slidably connected to the moving block 303. The slide 305 passes through the center of the rotating seat 302. A threaded rod 306 is rotatably connected in the slide 305. The moving block 303 is connected to the The threaded rod 306 is threadedly connected, and the moving block 303 is fixedly connected to the first hinge seat 304. During the test, one end of the hydraulic damper cylinder is hinged to the first hinge seat 304 through a pin shaft, and a rotating motor 307 is installed on the support frame 300. A worm 308 is fixedly connected to the rotating shaft of the rotating motor 307. The rotating seat 302 is coaxially fixed with a worm wheel 309 that meshes with the worm 308. The rotating motor 307 drives the worm 308 to rotate, and the worm 308 drives the worm wheel 309 to rotate, thereby driving the rotating seat 302 to rotate, thereby changing the up, down, left, and right positions of the first hinge seat 304, where the up, down, left, and right directions refer to the attached Figure 7 The threaded rod 306 is rotated to drive the movable block 303 to slide in the slide groove 305, thereby changing the distance between the first hinge seat 304 and the center of the rotating seat 302, thereby changing the force angle of the hydraulic damper, and more realistically simulating the force condition of the hydraulic damper during actual use, making the test of the hydraulic damper more comprehensive.

[0030] This embodiment further discloses a method for testing the dynamic and static performance of a hydraulic damper, based on the structure of the above-mentioned embodiment 1 or embodiment 2, including the following two test modes: 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 cylinder 504 drives the locking frame 503 to move. The locking frame 503 releases the test seat 502. The hydraulic cylinder 600 pushes the test assembly 500 down to the specified position. The motor 505 then drives the cam 506 to rotate, causing the test seat 502 to vibrate back and forth. 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, wherein 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 driven to move 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 to test the static performance of the hydraulic damper.

[0031] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0032] 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 aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A hydraulic damper dynamic and static performance testing device, characterized in that: include: A test machine (100), wherein a vertically arranged frame (200) is fixedly connected to the test machine (100); a test assembly (500) is slidably connected to the frame (200), and a slide rail (201) slidably connected to the test assembly (500) is provided on the surface of the frame (200); The upper and lower ends of the frame (200) are respectively fixedly connected to a cylinder frame (400) and a support frame (300); a hydraulic cylinder (600) is fixedly mounted on the cylinder frame (400) for driving the test assembly (500) to move; a hydraulic damper is mounted between the test assembly (500) and the support frame (300); and a laser displacement sensor (700) is mounted on the support frame (300); The test assembly (500) includes a slide (501) slidably connected to the slide rail (201), a test seat (502) movably connected to the slide (501), and a drive motor (505) fixedly installed on the slide (501), and a cam (506) for driving the test seat (502) to vibrate back and forth fixedly connected to the rotating shaft of the drive motor (505); a locking cylinder (504) is installed on the slide (501), and the piston rod of the locking cylinder (504) is fixedly connected to a locking frame (503) for locking and fixing the test seat (502).

2. The dynamic and static performance testing equipment for a hydraulic damper according to claim 1, characterized in that: The test seat (502) is fixedly connected to a force sensor (5023), and the force sensor (5023) is fixedly connected to a vibration seat (5022).

3. The dynamic and static performance testing equipment for a hydraulic damper according to claim 2, characterized in that: 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 inclined rail (5025) is fixedly connected to the test seat (502), and a pressure rod (5033) that slidably cooperates with the inclined rail (5025) is fixedly connected to the locking frame (503).

4. The dynamic and static performance testing equipment for a hydraulic damper according to claim 3, characterized in that: A pair of side plates (507) are symmetrically fixedly connected to the slide seat (501), 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 sliding rod (510) slidably connected to the test seat (502) is fixedly connected to the fixed plate (509).

5. The dynamic and static performance testing equipment for a hydraulic damper according to claim 4, characterized in that: A vertical sliding hole (508) is provided on the side plate (507), and sliders (5031) slidably connected to the sliding hole (508) are fixedly connected at both ends of the locking frame (503); and a motor frame (511) is fixedly connected between the two side plates (507), and the locking cylinder (504) and the driving motor (505) are both mounted on the motor frame (511).

6. The dynamic and static performance testing equipment for a hydraulic damper according to claim 5, characterized in that: The support frame (300) has an axle seat (301) fixedly mounted on its surface, a rotating seat (302) rotatably connected to the axle seat (301), a moving block (303) slidably connected to the surface of the rotating seat (302), a first hinge seat (304) connected to the moving block (303), and a second hinge seat (5021) rotatably connected to the surface of the test seat (502).

7. The dynamic and static performance testing equipment for a hydraulic damper according to claim 6, characterized in that: A sliding groove (305) is provided on the surface of the rotating seat (302), the moving block (303) is slidably connected to the sliding groove (305), and a threaded rod (306) is rotatably connected in the sliding groove (305), and the moving block (303) is threadedly connected to the threaded rod (306).

8. The dynamic and static performance testing equipment for a hydraulic damper according to claim 7, characterized in that: A rotating motor (307) is mounted on the support frame (300), a worm (308) is fixedly connected to the rotating shaft of the rotating motor (307), and a worm wheel (309) meshing with the worm (308) is coaxially fixedly connected to the rotating seat (302).

9. A method for testing the dynamic and static performance of a hydraulic damper, using the dynamic and static performance testing device for a hydraulic damper according to claim 8, characterized in that: include: Dynamic test: The hydraulic damper is installed between the test assembly (500) and the support frame (300), wherein the two ends of the hydraulic damper are hinged to the first hinge seat (304) and the second hinge seat (5021) respectively, and the locking frame (503) is driven to move by the locking cylinder (504). The locking frame (503) releases the test seat (502), and the hydraulic cylinder (600) pushes the test assembly (500) down to a specified position, and then the driving motor (505) drives the cam (506) to rotate, driving 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), wherein the two ends of the hydraulic damper are hinged to the first hinge seat (304) and the second hinge seat (5021) respectively, and the locking frame (503) is driven to move by the locking cylinder (504), and the locking frame (503) locks and fixes the test seat (502), and then the test assembly (500) is pushed down by the hydraulic cylinder (600), and pressure is applied to the hydraulic damper to test the static performance of the hydraulic damper.

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