A hydraulic cylinder fault detection platform

Abstract

The utility model relates to a kind of hydraulic cylinder fault detection platform, it is related to hydraulic cylinder fault detection equipment field, including test bench, fixed hinged support, mobile device, lifting oil cylinder, tension cylinder, accompanying test oil cylinder and eccentric load component, test bench is square, annular slide rail is equipped on test bench, and the bottom end sliding base of fixed hinged support is slidably installed on annular slide rail;Mobile device is located in the horizontal axis direction of fixed hinged support, and mobile device is slidably installed on two straight rails.The present hydraulic cylinder fault detection device is improved on the basis, by setting the annular slide rail for the sliding of fixed hinged support on test bench and the straight rail of mobile device slidably installed by movably connecting test bench, as many as possible different postures of hydraulic cylinder actual use can be simulated, so that sensor can collect sensor data under different gravity conditions of hydraulic cylinder, it is favorable to neural algorithm improvement of intelligent fault detection model.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic cylinder fault detection equipment, specifically a hydraulic cylinder fault detection platform. Background Technology

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or oscillating motion). Crawling / vibration and vibration / abnormal noise faults in hydraulic cylinders have a significant impact on the safe and reliable operation of the host machine. A hydraulic cylinder fault detection device (publication number CN218564076U) includes a test bench, test equipment, fixed pins, and movable supports. It can be adjusted to different detection configurations according to different fault detection scenarios. It can also conduct loading and fatigue durability tests, including six scenario simulations: no-load, axial loading, radial off-center loading, radial off-center loading + axial loading, center of gravity change + radial off-center loading + axial loading, and operational condition simulation. While meeting basic performance test requirements (a. trial operation, b. starting pressure characteristic test, c. pressure resistance test, d. durability test, e. leakage test, f. buffer test, g. load efficiency test, h. high temperature test, i. stroke detection), it can also perform crawling / vibration fault detection, vibration / abnormal noise fault detection, and output characteristic fault detection. The aforementioned patent can fully simulate the actual working conditions of hydraulic cylinders, with a compact structural design, comprehensive functions, and strong practicality; the structural components used are all conventional sensors and control hardware.

[0003] Existing hydraulic cylinder fault detection methods largely utilize known intelligent fault detection models. These models use signals collected by sensors such as hydraulic pressure sensors, position sensors, and vibration sensors as input and output signals. A neural network algorithm then predicts performance parameters such as internal leakage, creeping / vibration faults, vibration / abnormal noise faults, and output characteristic faults, thus performing intelligent fault diagnosis for the hydraulic cylinder. Therefore, when collecting sensor data, it is essential to provide sensor data from multiple orientations of the hydraulic cylinder, and to consider the changes in sensor data at different positions of the hydraulic cylinder under different gravity conditions (the influence of different gravity directions on the hydraulic cylinder's components). This allows the neural network algorithm to obtain more training data. However, in the aforementioned technical solutions, when the test bench is raised, the hydraulic cylinder is below and the piston rod is above, effectively only considering gravity conditions in one direction. Different positions of the hydraulic cylinder lead to different pressures in the two chambers, resulting in differences in signal data such as position and vibration direction. This limits the intelligent fault detection model obtained after training the neural network algorithm with the acquired training data. Utility Model Content

[0004] The purpose of this invention is to address the problems in the prior art by providing a hydraulic cylinder fault detection platform.

[0005] This utility model achieves the above objectives through the following technical solutions: A hydraulic cylinder fault detection platform includes a test bench, a fixed hinge bracket, a mobile device, a lifting cylinder, a tension cylinder, a test cylinder, and an off-center load assembly. The test bench is square and has an annular slide rail. The bottom slide of the fixed hinge bracket is slidably mounted on the annular slide rail. The inner and outer sides of the annular slide rail are provided with clamps for limiting and fixing the slide of the hinge bracket, and the clamps are arranged in eight equal parts along the center of the annular slide rail. The mobile device is located on the horizontal axis of the fixed hinge bracket, and the mobile device is slidably mounted on two straight rails. The two straight rails are arranged in parallel and symmetrical arrangement. The upper end of the test bench is provided with a first set of mounting holes that match the two straight rails, and the first set of mounting holes is arranged in eight equal parts along the center of the annular slide rail.

[0006] As a further optimization of this utility model, one end of the test bench is hinged to the mounting surface via a hinge, and the other end is attached to the shock-absorbing bracket.

[0007] As a further optimization of this utility model, the first mounting hole group includes at least two mounting holes that match each straight rail.

[0008] As a further optimization of this utility model, the test cylinder and the off-center loading assembly are movably mounted on the test bench; The upper end of the test bench is also provided with a second set of mounting holes that match the bottom of the test cylinder and the limiting component. The second set of mounting holes is arranged in eight equal parts along the center of the annular slide rail. The second set of mounting holes includes at least two mounting holes that match the bottom of the cylinder and at least two mounting holes that match the limiting component. The third mounting hole group is arranged in eight equal parts along the center of the annular slide rail, and the third mounting hole group includes at least two sets of linearly distributed mounting holes.

[0009] As a further optimization of this utility model, each straight rail, the bottom of the test cylinder, and the bottom of the limiting component or the off-center load component bracket are provided with mounting parts that match the mounting holes, and the mounting parts fit into the mounting holes.

[0010] As a further optimization of this utility model, a limiting lever is provided on one side of the clamp, and the limiting lever is located inside the annular slide rail, which is used to limit the fixed hinge bracket.

[0011] The beneficial effects of this utility model are as follows: This hydraulic cylinder fault detection platform improves upon existing hydraulic cylinder fault detection devices by installing an annular slide rail on the test bench for fixing the sliding hinge bracket and a straight rail that connects to the test bench and allows the mobile device to slide. This allows for the simulation of various postures of the hydraulic cylinder in actual use, enabling sensors to collect data under different gravity conditions, which is beneficial for improving the neural algorithm of the intelligent fault detection model. Furthermore, it expands the platform to include six scenarios: no load, axial load, radial off-center load, radial off-center load + axial load, center of gravity change + radial off-center load + axial load, and working condition simulation, effectively solving the problems mentioned in the background technology. Attached Figure Description

[0012] Figure 1 This is a front structural diagram of the hydraulic cylinder fault detection platform of this utility model; Figure 2 This is a top view of the hydraulic cylinder fault detection platform of this utility model; Figure 3 yes Figure 2 Detailed illustrations (including the first mounting hole group, the second mounting hole group, and the third mounting hole group).

[0013] Illustration: 1. Test bench; 2. Fixed hinge bracket; 3. Mobile equipment; 4. Lifting cylinder; 5. Tension cylinder; 6. Accompanying cylinder; 7. Off-center load assembly; 8. Vibration damping bracket; 9. Annular slide rail; 10. Clamp; 11. Straight rail; 12. First mounting hole group; 13. Second mounting hole group; 14. Third mounting hole group; 15. Limiting lever. Detailed Implementation

[0014] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0015] Example 1 like Figure 1 As shown, the hydraulic cylinder fault detection platform of this embodiment includes a test bench 1, a fixed hinged bracket 2, a mobile device 3, a lifting cylinder 4, a tension cylinder 5, a test cylinder 6, and an off-center load assembly 7. Figure 1 The test cylinder is located between the fixed hinge bracket 2 and the mobile device 3. The connection and specific structure of the above components, the setting and control of sensors, the operation of each cylinder and the hydraulic principle are all existing technologies.

[0016] like Figure 2As shown, the test bench 1 is square, and an annular slide rail 9 is provided on the test bench 1. The center of the annular slide rail 9 coincides with the center of the test bench 1. The bottom slide of the fixed hinge bracket 2 is slidably installed on the annular slide rail 9. Both the inner and outer sides of the annular slide rail 9 are provided with clamps 10 for limiting and fixing the slide of the hinge bracket 2. The clamps 10 are arranged in eight equal parts along the center of the annular slide rail 9. The angle between the axis of two adjacent sets of clamps 10 and the center of the annular slide rail 9 is 45°. The cross-section of the annular slide rail 9 is preferably "T" shaped. The bottom end of the bottom slide of the fixed hinge bracket 2 is provided with a groove that matches the "T" shape. The clamps 10 are common adjustable clamps in the prior art, including but not limited to spring clamps and screw clamps. The mobile device 3 is located on the horizontal axis of the fixed hinge bracket 2, and is slidably mounted on two straight rails 11. These rails restrict the movement of the mobile device 3 along the direction of motion of the tested cylinder, preventing it from moving to either side and avoiding non-fault-related vibration, pressure, and position signals from the sensor. The two straight rails 11 are symmetrically arranged parallel to the horizontal diameter of the annular slide rail 9. The upper end of the test bench 1 is provided with a first mounting hole group 12 that matches the two straight rails 11. The first mounting hole group 12 is divided into eight equal parts along the center of the annular slide rail 9. The first mounting hole group 12 includes at least two mounting holes that match each straight rail 11. Figure 3 As shown in A1, A2, A3, and A4, the sliding method of the mobile device 3 on the straight rail 11 includes, but is not limited to, the following: the bottom end of the mobile device 3 is provided with a pulley with a groove in the middle, and the straight rail 11 is provided with two grooves and one protrusion. The protrusion matches the grooves, so that the mobile device 3 can slide on the straight rail 11, and it also limits the left and right movement of the mobile device 3, and facilitates the removal of the mobile device 3 from the straight rail 11.

[0017] In use, the fixed hinge bracket 2 is placed at one starting end of the annular slide rail 9, and the fixed hinge bracket 2 is fixed using the clamp 10. Then, the two straight rails 11 are installed on the first mounting hole group 12 where the corresponding extended axis of the clamp 10 is located. The mobile device 3 is then installed on the two straight rails 11 and slid to the position matching the piston rod of the tested cylinder. After confirming that it is fixed, the bottom of the tested cylinder is movably installed on the fixed hinge bracket 2, and the piston rod of the tested cylinder is movably installed on the mobile device 3. After installation, the corresponding scenario is simulated, and the equipment is started for testing. After testing in one direction is completed, the mobile device is moved... Device 3 is disassembled from the straight rail 11 and tilted at a certain angle relative to the fixed hinge bracket 2, so that the mobile device 3 leaves the straight rail 11. Then, the fixed hinge bracket 2 is slid along the annular slide rail 9 to the second detection position. First, the straight rail 11 is disassembled and installed on the first mounting hole group 12 where the axis extension line of the second set of clamps 10 is located. The mobile device 3 is lowered and installed on the straight rail 11. Then, the second set of clamps 10 is used to fix the fixed hinge bracket 2. After confirming that all parts are fixed, the corresponding scene is simulated and the device is started for detection. By analogy, eight sets of sensor data with different postures can be obtained in one scene.

[0018] The test cylinder 6 and the off-center loading assembly 7 are movably mounted on the test bench 1. The upper end of the test bench 1 is also provided with a second mounting hole group 13 that matches the cylinder bottom and limiting component of the test cylinder 6. The second mounting hole group 13 is arranged in eight equal parts along the center of the annular slide rail 9. The second mounting hole group 13 includes at least two mounting holes that match the cylinder bottom and at least two mounting holes that match the limiting component. Figure 3 The numbers B1, B2, B3, and B4 are shown. The upper end of the test bench 1 is also provided with a third mounting hole group 14 that matches the bracket of the off-center loading component 7. The third mounting hole group 14 is arranged in eight equal parts along the center of the annular slide rail 9. The third mounting hole group 14 includes at least two sets of linearly distributed mounting holes, such as... Figure 3 The numbers C1, C2, C5, C6, C7, C3, C4, C8, C9, and C10 shown are applicable to hydraulic cylinders of different sizes.

[0019] Each straight rail 11, the bottom of the test cylinder 6, and the bottom of the limit component or off-center load component 7 bracket are provided with a mounting part that matches the mounting hole. The mounting part fits into the mounting hole, or other movable fitting and fixing methods can be used.

[0020] This hydraulic cylinder fault detection platform can further expand the hydraulic cylinder attitude in eight directions under six different scenarios (no load, axial load, radial off-center load, radial off-center load + axial load, center of gravity change + radial off-center load + axial load, and six scenarios of working condition simulation). It can collect sensor data when the hydraulic cylinder piston rod is on top and sensor data when the piston rod is on the bottom. It can obtain the influence data of different gravity directions of the hydraulic cylinder components on the hydraulic cylinder, making the training set data obtained by the existing intelligent hydraulic system fault detection model more comprehensive and accurate.

[0021] Furthermore, one end of the test bench 1 is hinged to the mounting surface via a hinge, and the other end is attached to the shock-absorbing bracket 8, which can buffer the test bench when it is lowered.

[0022] Furthermore, a limiting lever 15 is provided on one side of the clamp 10, and the limiting lever 15 is located inside the annular slide rail 9. It is used to limit the fixed hinge bracket 2. It can play the role of initial limiting and positioning when the fixed hinge bracket 2 changes at different angles. When sliding to the next position, force is applied to push open the limiting lever 15 so that the sliding can continue.

[0023] The above-described embodiments are merely one implementation of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A hydraulic cylinder fault detection platform, comprising a test bench (1), a fixed hinged bracket (2), a mobile device (3), a lifting cylinder (4), a tension cylinder (5), a test cylinder (6), and an off-center loading assembly (7), characterized in that, The test bench (1) is square, and an annular slide rail (9) is provided on the test bench (1). The bottom slide of the fixed hinge bracket (2) is slidably installed on the annular slide rail (9). The inner and outer sides of the annular slide rail (9) are provided with clamps (10) for limiting and fixing the slide of the hinge bracket (2), and the clamps (10) are arranged in eight equal parts along the center of the annular slide rail (9). The mobile device (3) is located on the horizontal axis of the fixed hinge bracket (2), and the mobile device (3) is slidably mounted on two straight rails (11). The two straight rails (11) are arranged in parallel and symmetrically. The upper end of the test bench (1) is provided with a first mounting hole group (12) that matches the two straight rails (11), and the first mounting hole group (12) is arranged in eight equal parts along the center of the annular slide rail (9).

2. The hydraulic cylinder fault detection platform according to claim 1, characterized in that, One end of the test bench (1) is hinged to the mounting surface via a hinge, and the other end is attached to the shock absorber bracket (8).

3. The hydraulic cylinder fault detection platform according to claim 1, characterized in that, The first mounting hole group (12) includes at least two mounting holes that match each straight rail (11).

4. The hydraulic cylinder fault detection platform according to claim 1, characterized in that, The test cylinder (6) and the off-center load assembly (7) are movably mounted on the test bench (1); The upper end of the test bench (1) is also provided with a second mounting hole group (13) that matches the cylinder bottom and the limiting component of the test cylinder (6). The second mounting hole group (13) is arranged in eight equal parts along the center of the annular slide rail (9). The second mounting hole group (13) includes at least two mounting holes that match the cylinder bottom and at least two mounting holes that match the limiting component. The upper end of the test bench (1) is also provided with a third mounting hole group (14) that matches the bracket of the off-center load component (7). The third mounting hole group (14) is arranged in eight equal parts along the center of the annular slide rail (9). The third mounting hole group (14) includes at least two sets of linearly distributed mounting holes.

5. A hydraulic cylinder fault detection platform according to any one of claims 3 or 4, characterized in that, Each straight rail (11), the bottom of the test cylinder (6), and the bottom of the limit component or off-center load assembly (7) bracket are provided with a mounting component that matches the mounting hole, and the mounting component fits into the mounting hole.

6. A hydraulic cylinder fault detection platform according to claim 1, characterized in that, The clamp (10) is provided with a limiting piece (15) on one side, and the limiting piece (15) is located inside the annular slide rail (9) for limiting the fixed hinge bracket (2).

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