A multi-parameter coordinated regulation hydraulic system intelligent fatigue detection platform

Abstract

The utility model discloses a kind of multi-parameter collaborative regulation and control's hydraulic system intelligent fatigue detection platform, including detection car, automatic accelerator control module, automatic gear control module, lifting angle control module, oil temperature regulating module and lifting frequency statistical module;The automatic accelerator control module includes control throttle double-shaft air cylinder and the accelerator pedal connected by guide rail tool and control throttle double-shaft air cylinder;The automatic gear control module includes control gear double-shaft air cylinder, the push-pull cable connected with the output end of control gear double-shaft air cylinder and the hydraulic pump gear operating lever connected with the other end of push-pull cable;The lifting angle control module includes support, inclination switch fixedly installed on support and rocker mechanism set in the side of support.The utility model can be according to real-time working condition dynamic adjustment parameter, realize multidimensional collaborative operation, make detection process completely automation, and can carry out synchronous, accurate regulation and control to multiple key parameters, ensure the efficiency and accuracy of detection process.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic system testing technology. Specifically, this utility model relates to an intelligent fatigue testing platform for hydraulic systems with multi-parameter coordinated control. Background Technology

[0002] Hydraulic systems provide driving force for industrial applications through pressure transformation and are mainly composed of hydraulic components and working medium. The importance of hydraulic systems lies in their unique pressure transformation capability, which provides powerful driving force for various industrial applications. It is mainly composed of two core parts: hydraulic components and working medium. The hydraulic components themselves can be further subdivided into four aspects: power components, actuators, control components, and auxiliary components.

[0003] A fatigue testing system is a scientific instrument that verifies the mechanical behavior of materials and the effectiveness of structural optimization by applying cyclic loads. Currently, most fatigue tests on hydraulic pumps, cylinders and distributors rely on manual operation of the accelerator and gear shifting to control the vehicle's lifting and lowering, completing about 3,000 tests.

[0004] However, manual operation has many problems: First, it is labor-intensive, and it is difficult to ensure that each action is consistent, resulting in poor accuracy and reliability of test data; second, there is a lack of oil temperature control methods, and oil temperature fluctuations will affect the performance of the hydraulic system and interfere with the test results; in addition, the number of lifting and lowering times and the lifting angle cannot be flexibly adjusted during the test, and it is impossible to view them in real time, making it difficult to meet diverse test needs and hindering the accurate analysis of test data. Utility Model Content

[0005] This invention provides an intelligent fatigue detection platform for hydraulic systems with multi-parameter coordinated control, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a multi-parameter collaborative control intelligent fatigue detection platform for hydraulic systems, including a detection vehicle, an automatic throttle control module, an automatic gear shifting control module, a lifting angle control module, an oil temperature adjustment module, and a lifting frequency statistics module;

[0007] The automatic throttle control module includes a dual-axis cylinder for controlling the throttle and a throttle pedal connected to the dual-axis cylinder for controlling the throttle via a guide rail fixture.

[0008] The automatic gear shifting control module includes a dual-axis cylinder for gear shifting, a push-pull cable connected to the output end of the dual-axis cylinder for gear shifting, and a hydraulic pump gear shifting operation lever connected to the other end of the push-pull cable.

[0009] The lifting angle control module includes a bracket, a tilt switch fixedly installed on the bracket, and a rocker mechanism disposed on one side of the bracket.

[0010] The oil temperature regulation module includes a thermal resistor installed on the hydraulic system oil pipeline, an air-cooling system installed on the testing vehicle, and a temperature controller installed on the top of the testing vehicle.

[0011] The lifting and lowering count module includes an electronic digital counter installed on the top of the inspection vehicle and a minimum detection switch connected to the trigger terminal of the electronic digital counter.

[0012] Preferably, it also includes an oil outlet pipe for the test bench and an air-cooled oil inlet pipe installed on the test vehicle.

[0013] Preferably, the opening and closing state of the heat sink of the air-cooling system is dynamically linked to the fan speed through a temperature controller.

[0014] The beneficial effects of adopting the above technical solutions are:

[0015] I. During the lifting test, this solution can dynamically adjust parameters according to real-time working conditions through the automatic throttle control module, automatic gear shifting control module, and lifting angle control module, realizing multi-dimensional collaborative operation, making the testing process fully automated, and enabling synchronous and precise control of multiple key parameters to ensure the efficiency and accuracy of the testing process.

[0016] Second, this solution utilizes the rapid response and precise power output characteristics of cylinders, combined with advanced control algorithms, to achieve high-precision control of throttle and gear shifting. This not only improves the accuracy of control but also greatly enhances the stability and reliability of the equipment, providing more stable and accurate power transmission and operation control for the entire testing process.

[0017] Third, this equipment can easily adjust parameters according to specific needs. Whether it is for fine testing of small angles and low oil temperatures or simulation of extreme working conditions of large angles and high oil temperatures, it can be accurately adapted, which can meet the testing needs of various types of hydraulic components, greatly improving the versatility and practicality of the equipment. Attached Figure Description

[0018] Figure 1 This is an assembly diagram of the testing platform performing the testing;

[0019] Figure 2 This is a partial assembly diagram of the testing platform during testing;

[0020] Figure 3 This is a schematic diagram of the overall structure of the testing platform;

[0021] Figure 4 This is a structural diagram of the automatic throttle control module;

[0022] Figure 5 This is a structural diagram of the automatic gear shifting control module;

[0023] Figure 6 This is a structural diagram of the lifting angle control module;

[0024] in:

[0025] 1. Automatic throttle control module; 11. Dual-axis throttle cylinder; 12. Guide rail fixture; 13. Throttle pedal; 2. Automatic gear shifting control module; 21. Dual-axis gear shifting control cylinder; 22. Push-pull cable; 23. Hydraulic pump gear shifting operating lever; 3. Lifting angle control module; 31. Bracket; 32. Tilt switch; 33. Rocker mechanism; 4. Oil temperature regulation module; 41. Resistance temperature detector; 42. Air cooling system; 43. Temperature controller; 5. Lifting frequency statistics module; 51. Electronic digital display counter; 52. Minimum detection switch device; 6. Test bench oil outlet pipe; 7. Air-cooled oil inlet pipe. Detailed Implementation

[0026] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of this utility model, and to facilitate its implementation.

[0027] Specifically, such as Figures 1 to 6 As shown, a multi-parameter collaborative control intelligent fatigue detection platform for hydraulic systems includes a detection vehicle, an automatic throttle control module 1, an automatic gear shifting control module 2, a lifting angle control module 3, an oil temperature adjustment module 4, and a lifting frequency statistics module 5.

[0028] The detailed description of the module is as follows:

[0029] Automatic throttle control module 1: Existing detection equipment relies heavily on manual operation or simple electric push rods for throttle control, resulting in poor control accuracy and stability. This invention adopts a combination of "cylinder + mechanical transmission structure" and achieves precise adjustment of throttle opening and closing through a uniquely designed mechanical transmission device, completely replacing manual throttle operation.

[0030] Automatic gear shifting control module 2: Traditional hydraulic pump gear shifting often requires manual insertion or removal or the use of an electromagnetic clutch, which has the problems of high gear shifting failure rate and slow response speed; This invention utilizes an innovative connection method between the cylinder push-pull cable and the hydraulic pump gear shifting mechanism, combined with an adaptive force feedback control strategy, so that the cylinder automatically adjusts the thrust according to the gear shifting resistance, increasing the gear shifting success rate to 99.8%.

[0031] Lifting Angle Control Module 3: Existing detection platforms mostly use potentiometers or ordinary angle sensors, with angle control accuracy of about ±3°; this invention uses a high-precision tilt switch to control the lifting angle deviation to <1°, and through the fuzzy PID control algorithm of the PLC, it realizes rapid response and precise adjustment of the angle, meeting the high-precision detection requirements under complex working conditions.

[0032] Oil Temperature Regulation Module 4: Traditional oil temperature control often uses constant speed fans or simple on / off heat sinks, which cannot achieve precise oil temperature regulation. The intelligent oil temperature regulation module of this invention innovatively adopts a composite control strategy of "real-time monitoring of thermal resistance + PID frequency conversion control + intelligent heat sink linkage" to control the oil temperature fluctuation range within ±2℃.

[0033] Module 5 for counting the number of lifts: Existing detection equipment mostly relies on mechanical counters or simple photoelectric sensors to count the number of lifts, which suffers from large counting errors and the inability to flexibly set cyclic modes. This invention adopts an electronic digital display counter deeply integrated with a PLC, supporting multiple counting modes such as single, cyclic, and step-by-step counting. With the help of edge computing technology, it can complete the counting response and logic judgment in milliseconds, achieving a counting accuracy of 100%.

[0034] The automatic throttle control module 1 includes a dual-axis cylinder 11 for controlling the throttle and a throttle pedal 13 connected to the dual-axis cylinder 11 via a guide rail fixture 12.

[0035] It should be noted that the PLC controller presets the throttle opening and closing action parameters, such as opening and closing range and response time, according to the test requirements. When the test starts, the PLC controller sends a command to the dual-axis cylinder 11. The piston rod of the dual-axis cylinder 11 performs reciprocating linear motion according to the command. Through the precise transmission of the lifting guide tooling 12, it drives the throttle pedal 13 to complete the precise action, realizing automatic and precise throttle control and replacing manual operation.

[0036] The automatic gear shifting control module 2 includes a dual-axis cylinder 21 for gear shifting, a push-pull cable 22 connected to the output end of the dual-axis cylinder 21 for gear shifting, and a hydraulic pump gear shifting operation lever 23 connected to the other end of the push-pull cable 22.

[0037] It should be noted that, based on the actual installation position and stroke distance of the hydraulic pump shifting mechanism, a push-pull cable 22 with matching length and tension is selected. The piston rod of the dual-axis cylinder 21 controlling the shifting is fixedly connected to one end of the push-pull cable 22, and the other end of the push-pull cable 22 is connected to the hydraulic pump shifting operating lever 23. The shifting logic and operation sequence are preset in the controller. When the test process progresses to the corresponding stage, the controller sends a command to the dual-axis cylinder 21, and the dual-axis cylinder 21 extends and retracts. Through the push-pull cable 22, it drives the hydraulic pump shifting operating lever 23 to complete the automatic shifting and disengaging operation, ensuring the accuracy and stability of the operation.

[0038] The lifting angle control module 3 includes a bracket 31, a tilt switch 32 fixedly installed on the bracket 31, and a rocker mechanism 33 disposed on one side of the bracket 31.

[0039] It should be noted that the high-precision tilt switch 32 is fixedly mounted on the bracket 31, and its position on the side baffle is adjusted by the rocker mechanism 33 to ensure that the tilt switch 32 can sensitively and accurately sense the change in the lifting angle of the detection platform. The tilt switch 32 is connected to the PLC controller through a signal line and transmits the collected angle signal to the controller in real time. After receiving the signal, the PLC controller compares and calculates with the preset angle range, and then precisely controls the lifting action of the hydraulic cylinder to achieve precise control of the lifting angle.

[0040] The oil temperature regulation module 4 includes a thermal resistor 41 installed on the hydraulic system oil pipeline, an air-cooling system 42 installed on the testing vehicle, and a temperature controller 43 installed on the top of the testing vehicle.

[0041] It should be noted that a thermal resistor 41 is installed at a key location in the hydraulic system's oil pipeline to collect oil temperature data in real time. The fan and heat sink of the air-cooled system 42 are arranged in a position that facilitates air circulation and heat dissipation. The thermal resistor 41 transmits the collected temperature signal to the PLC controller. The PLC controller automatically adjusts the fan speed and the opening and closing state of the heat sink of the air-cooled system 42 according to the preset temperature range through a PID algorithm. The temperature controller 43 is connected to the PLC controller and displays the oil temperature value in real time. Operators can also manually adjust the oil temperature control parameters on the temperature controller 43 according to actual needs to achieve intelligent adjustment and visualization of oil temperature.

[0042] The lifting count module 5 includes an electronic digital counter 51 installed on the top of the inspection vehicle and a minimum detection switch device 52 connected to the trigger terminal of the electronic digital counter 51.

[0043] It should be noted that the minimum detection switch device 52 is associated with the lifting action of the detection platform. Each time the detection platform completes one lifting action, the electronic digital display counter 51 increments by 1. The electronic digital display counter 51 is connected to the PLC controller through a communication line. The operator can freely set the target number of lifting actions on the PLC controller. When the value of the electronic digital display counter 51 reaches the set value, the PLC controller immediately issues a command to control the detection platform to stop the lifting action. At the same time, the current number of lifting actions is displayed in real time on the visual display screen, which makes it easy for the operator to keep track of the test progress.

[0044] It also includes the test bench oil outlet pipe 6 and the air-cooled oil inlet pipe 7, which are installed on the test vehicle.

[0045] The opening and closing state of the heat sink of the air-cooling system 42 is dynamically linked to the fan speed through the temperature controller 43.

[0046] It should be noted that the automatic operation process of this device is as follows:

[0047] Before loading, disconnect the oil pump inlet pipe of the original vehicle and connect the oil outlet pipe 6 of the test bench; disconnect the oil return pipe of the original distributor and connect the air-cooled oil inlet pipe 7 of the test bench; disconnect the original push-pull cable distributor handle end and replace it with the push-pull cable 22 of the test bench. After completing the connection, tighten each oil pipe clamp and push-pull cable joint, and carefully check the sealing and firmness of the connection. After confirming that there are no errors, load the vehicle into the test bench.

[0048] Move the vehicle and test bench to the designated test location and use a special fixing device to secure the vehicle tires to prevent the vehicle from shifting due to vibration during the test, which would affect the accuracy of the test.

[0049] Connect the oil pipe interface, push-pull cable interface and electrical interface on the test bench in sequence. After the connection is completed, conduct a comprehensive inspection of the connection status of each interface to ensure that there is no looseness, oil leakage, or electrical leakage before proceeding with the subsequent test.

[0050] After setting up the minimum detection switch 52, the oil temperature parameter is set on the temperature controller 43, the target number of lifting and lowering operations is set in the PLC controller, and the system is switched to automatic mode. After starting the test, the PLC controller sends a command to the dual-axis cylinder 11 controlling the throttle to drive the throttle pedal 13; at the same time, the dual-axis cylinder 21 controlling the gear shift completes the automatic gear shifting operation through the push-pull cable 22. The detection platform raises the carriage to the specified angle according to the preset program, and then lowers it to the lowest detection position to complete one test cycle, and repeats the process until the set number of times is reached.

[0051] The specific working method is described below using specific embodiments: Example 1

[0052] First, install and connect the equipment. Connect the oil outlet pipe 6, the air-cooled oil inlet pipe 7, and all module components of the test bench according to the aforementioned method, ensuring that the connections are firm and well-sealed. At the same time, preset the test parameters in the PLC controller in advance, as follows: The automatic throttle control module is set to throttle opening and closing state (extend / retract), with a response time of 0.5 seconds; the automatic gear shifting control module is set to forward gear and reverse gear in the shifting sequence; the lifting angle control module is preset to a target lifting angle of 30°; the oil temperature regulation module is set to an oil temperature control range of 50℃±2℃ on the temperature controller 43; the lifting number statistics module is set to a target lifting number of 3000 times.

[0053] After the test starts, the PLC controller sends a command to the dual-axis cylinder 11 controlling the throttle. The dual-axis cylinder 11 drives the throttle pedal 13 to operate according to the preset state and time, providing appropriate power. At the same time, the dual-axis cylinder 21 controlling the gear shifting operates according to the gear shifting logic, driving the hydraulic pump gear shifting lever 23 through the push-pull cable 22 to complete the gear shifting operation. The test platform carriage begins to rise and fall. The tilt switch 32 monitors the rising and falling angle in real time and feeds it back to the PLC controller. The controller precisely controls the hydraulic cylinder to keep the rising and falling angle within the range of 30°±1°. The thermal resistor 41 collects the oil temperature in real time. The PLC controller adjusts the fan speed and heat sink opening and closing state of the air-cooling system 42 according to the temperature signal through the PID algorithm to stabilize the oil temperature at 50℃±2℃. When the test platform carriage rises to the preset angle of the tilt switch 32, the carriage begins to fall to the lowest detection switch device 52 position. The electronic digital display counter 51 increments by 1. When the count reaches 3000, the PLC controller controls the test platform carriage to stop rising and falling and return to the initial position, completing the test. Example 2

[0054] For fatigue testing of a specific hydraulic cylinder, the test parameters were adjusted accordingly. In the PLC controller, the throttle opening / closing state (extend / retract) of the automatic throttle control module was set, with a response time of 0.3 seconds. The automatic gear shifting control module was configured with specific gear shifting logic and sequence based on the characteristics of the hydraulic pump adapted to this cylinder. The lifting angle control module preset a target lifting angle of 45°. The oil temperature regulation module set the oil temperature control range on the temperature controller 43 to 45℃±2℃. The lifting cycle statistics module set a target lifting cycle count of 5000.

[0055] During the test, each module worked collaboratively according to the set parameters. The automatic throttle control module precisely controlled the throttle to provide suitable power for the test; the automatic gear shifting control module accurately completed the gear shifting operation; the lifting angle control module precisely controlled the lifting angle of the test platform at 45°±1°; the oil temperature regulation module stabilized the oil temperature at 45℃±2℃; and the lifting number statistics module accurately counted the number of times. When the number of times reached 5000, the test platform carriage stopped lifting and returned to the initial position, completing the fatigue test of the cylinder.

[0056] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A multi-parameter collaborative control intelligent fatigue detection platform for hydraulic systems, characterized in that, It includes a testing vehicle, an automatic throttle control module (1), an automatic gear shifting control module (2), a lifting angle control module (3), an oil temperature adjustment module (4), and a lifting frequency statistics module (5); The automatic throttle control module (1) includes a dual-axis cylinder (11) for controlling the throttle and a throttle pedal (13) connected to the dual-axis cylinder (11) via a guide rail fixture (12). The automatic gear shifting control module (2) includes a dual-axis cylinder (21) for gear shifting, a push-pull cable (22) connected to the output end of the dual-axis cylinder (21) for gear shifting, and a hydraulic pump gear shifting operation lever (23) connected to the other end of the push-pull cable (22). The lifting angle control module (3) includes a bracket (31), a tilt switch (32) fixedly installed on the bracket (31), and a rocker mechanism (33) set on one side of the bracket (31). The oil temperature regulation module (4) includes a thermal resistor (41) installed on the hydraulic system oil pipeline, an air-cooling system (42) installed on the testing vehicle, and a temperature controller (43) installed on the top of the testing vehicle. The lifting count module (5) includes an electronic digital counter (51) installed on the top of the inspection vehicle and a minimum detection switch device (52) connected to the trigger end of the electronic digital counter (51).

2. The intelligent fatigue detection platform for a hydraulic system with multi-parameter coordinated control according to claim 1, characterized in that: It also includes the test bench oil outlet pipe (6) and the air-cooled oil inlet pipe (7) installed on the test vehicle.

3. The intelligent fatigue detection platform for a hydraulic system with multi-parameter coordinated control according to claim 1, characterized in that: The opening and closing state of the heat sink of the air-cooling system (42) is dynamically linked with the fan speed through the temperature controller (43).

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