Motor test system for endurance test of hydraulic motor
By integrating sensors within the valve, the problem of scattered sensor layout in hydraulic motor durability testing is solved, enabling efficient and accurate monitoring and control of hydraulic oil parameters, and improving the intelligence and convenience of the testing equipment.
Patent Information
- Application Number
- CN202520144559.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-01-21
AI Technical Summary
In existing hydraulic motor durability testing, the dispersed layout of sensors leads to low detection efficiency, high cost, and susceptibility to human interference. Furthermore, the complex wiring makes it difficult to achieve efficient and accurate data monitoring and control.
Multiple sensors are integrated into the sensor integrated valve. Hydraulic oil parameters are monitored in real time through the inlet and outlet hydraulic oil detection components. Data is transmitted to the durability test signal control terminal via wired or wireless means to achieve automatic detection and control.
It simplifies the testing process, improves testing efficiency and accuracy, reduces labor costs, and realizes intelligent and convenient durability testing of hydraulic motors.
Smart Images
Figure CN223708157U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hydraulic motors, and in particular to a motor testing system for hydraulic motor durability testing. Background Technology
[0002] In the design and development of hydraulic motors, durability testing is a crucial step in ensuring their reliability and stability. Durability testing effectively evaluates the operating condition of hydraulic motors under various working conditions, providing a strong basis for product optimization and improvement.
[0003] Currently, durability testing of hydraulic motors requires a multi-functional test bench. On one hand, this test bench must be able to conduct continuous, uninterrupted impact tests on the motor, typically ranging from tens of thousands to hundreds of thousands of impacts, with each impact lasting approximately 3 seconds. This impact test simulates the instantaneous high-intensity load impacts that a hydraulic motor might encounter in actual operation, testing its structural strength and the fatigue resistance of its components. On the other hand, the test bench also needs to test the motor's durability, that is, to allow the motor to run continuously for 100 to several hundred hours under constant pressure and speed conditions, thereby verifying its performance under long-term stable operation. Furthermore, the test bench's ability to perform rapid start and stop functions is also crucial, as this helps simulate the frequent start and stop conditions of hydraulic motors in actual operation, further examining its dynamic response characteristics.
[0004] During durability testing, real-time monitoring of the temperature, pressure, and flow rate of the motor's hydraulic oil is essential. It's crucial to monitor not only the parameters of the hydraulic oil entering the motor under test but also the condition of the hydraulic oil exiting it. However, current technologies have significant drawbacks in this regard. Currently, manual inspection is employed, with sensors scattered across various components. Manual inspection is not only inefficient and susceptible to human error, making it difficult to guarantee the accuracy and reliability of the test data. Furthermore, the dispersed sensor layout complicates the wiring of the entire testing system, increasing maintenance difficulty. More importantly, this distributed sensor layout and manual inspection method result in high testing costs and low efficiency. Utility Model Content
[0005] The technical problem to be solved by this utility model is to provide a motor testing system for hydraulic motor durability testing. The utility model integrates multiple sensors into a sensor integrated valve, allowing users to detect the temperature, pressure and flow of hydraulic oil during the test through a single component. The collected data is then transmitted to the durability test signal control terminal for display and control, which greatly reduces labor costs and improves the convenience of the testing equipment.
[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a motor testing system for hydraulic motor durability testing, including a motor under test, a load motor, and a system oil tank. The system oil tank simultaneously supplies hydraulic oil to both the motor under test and the load motor. It also includes a sensor integrated valve, which comprises a first pressure sensor, a first temperature sensor, a first flow sensor, a second pressure sensor, a second temperature sensor, and a second flow sensor. The first pressure sensor, the first temperature sensor, and the first flow sensor form an inlet hydraulic oil detection component, and the second pressure sensor, the second temperature sensor, and the second flow sensor form an outlet hydraulic oil detection component. The inlet and outlet hydraulic oil detection components transmit the detected data to a durability test signal control terminal via wired or wireless means. The hydraulic oil in the system oil tank is first detected by the inlet hydraulic oil detection component and then enters the inlet of the motor under test. The hydraulic oil performs work within the motor under test and is discharged to the motor outlet. The hydraulic oil at the motor outlet is detected by the outlet hydraulic oil detection component and finally returns to the system oil tank.
[0007] A further preliminary option of this utility model is: a first filter and a second filter are provided between the motor under test and the sensor integrated valve.
[0008] A further preliminary embodiment of this utility model is as follows: the first filter is installed on the front end line of the inlet hydraulic oil detection component, and the second filter is installed on the front end line of the outlet hydraulic oil detection component.
[0009] A further preliminary option of this utility model is: a safety relief valve is provided inside the sensor integrated valve, and the hydraulic oil in the system oil tank first enters the safety relief valve, and then enters the inlet hydraulic oil detection component through the safety relief valve.
[0010] A further preliminary option of this utility model is as follows: the sensor integrated valve is provided with a first check valve and a second check valve. The hydraulic oil in the system oil tank enters the first check valve after passing through the inlet hydraulic oil detection component, and the hydraulic oil of the motor under test enters the second check valve after passing through the outlet hydraulic oil detection component.
[0011] A further preliminary option of this utility model is: a liquid level sensor is installed inside the system's oil tank.
[0012] A further preliminary option of this utility model is: the motor under test and the load motor are connected by a coupling, and the main pump supplies hydraulic oil to the load motor from the system oil tank.
[0013] A further preliminary option of this utility model is: the durability test signal control terminal is connected to the mobile control terminal via a wireless signal.
[0014] A further preliminary embodiment of this utility model is: the durability test signal control terminal includes a control processor, a display screen, a control switch, and a wireless receiving and transmitting device.
[0015] Compared with existing technologies, this invention has significant advantages in hydraulic motor durability testing. First, it solves the problem of scattered sensor placement by concentrating multiple sensors within a sensor integrated valve. The first pressure sensor, first temperature sensor, and first flow sensor form the inlet hydraulic oil detection component, while the second pressure sensor, second temperature sensor, and second flow sensor form the outlet hydraulic oil detection component. This integrated design allows users to comprehensively monitor hydraulic oil temperature, pressure, and flow during testing using only a single component, greatly simplifying the testing process. Second, in terms of data transmission and control, the inlet and outlet hydraulic oil detection components can transmit detection data to the durability testing signal control terminal via wired or wireless means, facilitating real-time display and control, making the entire testing process more intelligent and efficient. Most importantly, this invention effectively reduces labor costs. Previously, manual testing was inefficient and data accuracy was susceptible to human error. Now, with automatic detection and data transmission via the sensor integrated valve, manual intervention is significantly reduced, improving testing efficiency and the convenience of the testing equipment, providing a superior solution for hydraulic motor durability testing. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation
[0017] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.
[0018] like Figure 1 As shown, a hydraulic motor durability testing system includes a test motor 1, a load motor 2, and a system oil tank 3. The system oil tank 3 simultaneously supplies hydraulic oil to both the test motor 1 and the load motor 2. The system also includes a sensor integrated valve 4, which comprises a first pressure sensor 5, a first temperature sensor 6, a first flow sensor 7, a second pressure sensor 8, a second temperature sensor 9, and a second flow sensor 10. When detecting hydraulic oil, a small portion of the hydraulic oil from each of the sensors is diverted into the sensors, while the remaining portion either flows into the system oil tank 3 or into the test motor 1.
[0019] The first pressure sensor 5, the first temperature sensor 6, and the first flow sensor 7 form the inlet hydraulic oil detection component, which detects the data of the hydraulic oil entering the tested motor 1. The second pressure sensor 8, the second temperature sensor 9, and the second flow sensor 10 form the outlet hydraulic oil detection component, which detects the hydraulic oil discharged from the tested motor 1. The inlet and outlet hydraulic oil detection components transmit the detected data to the durability test signal control terminal 11 via wired or wireless means. The durability test signal control terminal 11 can display the detected data. The hydraulic oil in the system oil tank 3 is first detected by the inlet hydraulic oil detection component before entering the oil inlet of the tested motor 1. The hydraulic oil performs work in the tested motor 1 and is discharged to the motor outlet. The hydraulic oil at the motor outlet is detected by the outlet hydraulic oil detection component and finally returns to the system oil tank 3.
[0020] Real-time monitoring data from imported and exported hydraulic oil detection components. The analysis of durability testing system failure and control primarily involves analyzing real-time system data, including pressure, flow rate, temperature, and liquid level information. When abnormal fluctuations occur in pressure, flow rate, temperature, and liquid level, the information monitoring and control algorithm calculates these fluctuations to determine if the durability testing system has failed and achieves the desired control effect, protecting the safety of the testing system.
[0021] The functions that can be detected include:
[0022] Pressure fluctuations, such as abnormal increases or decreases in pressure, are detected when the normal durability test pressure is set at 35 MPa and the motor speed is 90 r / min. If the pressure fluctuation exceeds 5%, the fluctuation is considered large. The pressure is transmitted to the computer via the pressure sensor, and the computer software control system automatically determines whether the test status is abnormal and controls the abnormal situation.
[0023] The following is a pseudocode description of the pressure fluctuation monitoring and control algorithm described above:
[0024]
[0025] In practice, the `getPressureSensorData` function needs to be implemented according to the specific hardware interface and communication protocol to obtain the current pressure value from the pressure sensor. The `sendAbnormalSignalToComputer` function is responsible for sending abnormal pressure data to the computer software control system, and its implementation also depends on the specific communication mechanism. The `computerControlSystemHandleAbnormal` function is defined in the computer software control system and is used to perform handling operations for abnormal conditions, such as stopping the test, recording abnormal information, and issuing alarms.
[0026] Flow fluctuations can be categorized into two types: first, abnormal flow fluctuations can cause instability in the motor testing system; second, flow sensors are installed at both the motor inlet and outlet, and the flow data transmitted by the system sensors is compared and calculated to determine whether the motor testing system is leaking oil, allowing for appropriate system control.
[0027] The following is a pseudocode description of a traffic fluctuation monitoring and control algorithm:
[0028]
[0029]
[0030] In actual implementation, the getImportedFlowSensorData and getExportedFlowSensorData functions need to obtain the corresponding flow sensor data according to the hardware interface and communication protocol. The getInitialImportedFlowValue and getInitialExportedFlowValue functions are used to obtain the initial flow value when the system starts up. The handleSystemUnstable and handleLeakage functions need to write corresponding processing logic according to specific system requirements, such as interacting with other modules of the control system and displaying prompt information on the display screen.
[0031] By calculating and analyzing the temperature values and temperature difference between the inlet and outlet oil ports, it is possible to determine whether there are any abnormalities inside the motor, and thus control the system accordingly.
[0032] The following is a pseudocode description of a temperature change monitoring and control algorithm:
[0033]
[0034] In actual implementation, the getInletTemperatureSensorData and getOutletTemperatureSensorData functions need to obtain the corresponding temperature sensor data according to the hardware interface and communication protocol. The getInitialInletTemperatureValue and getInitialOutletTemperatureValue functions are used to obtain the initial temperature value when the system starts up. The handleTemperatureAbnormal and handleTemperatureDifferenceAbnormal functions need to write corresponding processing logic according to specific system requirements, such as interacting with other modules of the control system and displaying prompt information on the display screen.
[0035] A first filter 12 and a second filter 13 are installed between the tested motor 1 and the sensor integrated valve 4. These filters remove impurities from the flowing hydraulic oil, preventing any impact on motor operation. The first filter 12 is located at the front end of the inlet hydraulic oil detection component, and the second filter 13 is located at the front end of the outlet hydraulic oil detection component. A safety relief valve 14 is installed within the sensor integrated valve 4. Hydraulic oil from the system oil tank 3 first enters the safety relief valve 14, and then flows through it into the inlet hydraulic oil detection component. If the pressure in the inlet pipe exceeds the set value of the safety relief valve 14, the valve will release the pressure exceeding the set value and return the depressurized oil to the oil tank, thus ensuring the normal operation of other hydraulic components. A first check valve 15 and a second check valve 16 are installed within the sensor integrated valve 4. Hydraulic oil from the system oil tank 3 passes through the inlet hydraulic oil detection component and then flows into the first check valve 15, while hydraulic oil from the tested motor 1 passes through the outlet hydraulic oil detection component and then flows into the second check valve 16. A check valve is used to prevent hydraulic oil backflow. A level sensor 17 is installed in the system oil tank 3 to monitor the hydraulic oil volume in the system oil tank, thereby calculating the operating status of the motor testing device.
[0036] The tested motor 1 and the load motor 2 are connected via a coupling. The main pump 21 supplies hydraulic oil to the load motor 2 from the system oil tank 3. The load motor 2 is driven by the main pump 21, and the load motor 2 is connected to the tested motor 1 via the coupling, performing counter-torsional rotation. When the pressure, fluctuation, temperature, and flow rate of the tested motor 1 become abnormal, the durability test signal control terminal 11 will send an electrical signal to the emergency stop button on the system control panel, stopping the system and protecting other hydraulic components. The abnormal information will be edited and sent to a mobile data terminal for manual analysis to determine if the system is damaged or requires repair. If the error is accidental or does not affect the continuation of the test, the system can be remotely logged into, and an emergency stop recovery command can be entered on the system panel. The durability test signal control terminal 11 is wirelessly connected to a mobile control terminal 18. The mobile control terminal 18 can be a mobile phone, which can remotely monitor and control the opening and closing of the tested motor 1. The durability test signal control terminal 11 includes a control processor, a display screen 19, a control switch 20, and a wireless receiver / transmitter. The display screen is used to show various data measured by the sensors, and the wireless transceiver is used to send or receive wireless data.
[0037] The durability test signal control terminal 11 sets the pressure fluctuation, upper and lower pressure thresholds, flow fluctuation, level sensor 17 threshold, and upper temperature threshold. When the oil enters the motor under test 1 and flows out through the sensor integrated valve 4, the sensor converts the oil flow, pressure, temperature, and other information at the inlet and outlet into electrical signals and transmits them to the durability test signal control terminal 11.
[0038] The above provides a detailed description of the hydraulic motor durability testing system provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments are merely for the purpose of helping to understand this utility model and its core ideas. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.
Claims
1. A motor testing system for endurance testing of a hydraulic motor, comprising a motor under test, a load motor, and a system oil tank, wherein the system oil tank simultaneously supplies hydraulic oil to both the motor under test and the load motor, characterized in that... It also includes a sensor integrated valve, which comprises a first pressure sensor, a first temperature sensor, a first flow sensor, a second pressure sensor, a second temperature sensor, and a second flow sensor. The first pressure sensor, the first temperature sensor, and the first flow sensor form an inlet hydraulic oil detection component, and the second pressure sensor, the second temperature sensor, and the second flow sensor form an outlet hydraulic oil detection component. The inlet hydraulic oil detection component and the outlet hydraulic oil detection component transmit the detected data to the durability test signal control terminal via wired or wireless means. The hydraulic oil in the system tank is first detected by the inlet hydraulic oil detection component and then enters the inlet of the motor under test. The hydraulic oil performs work in the motor under test and is discharged to the motor outlet. The hydraulic oil at the motor outlet is detected by the outlet hydraulic oil detection component and finally returns to the system tank.
2. The motor testing system for durability testing of a hydraulic motor according to claim 1, characterized in that... A first filter and a second filter are provided between the motor under test and the sensor integrated valve.
3. The motor testing system for durability testing of a hydraulic motor according to claim 2, characterized in that... The first filter is installed on the front end of the inlet hydraulic oil detection assembly, and the second filter is installed on the front end of the outlet hydraulic oil detection assembly.
4. The motor testing system for durability testing of a hydraulic motor according to claim 1, characterized in that... The sensor integrated valve is equipped with a safety relief valve. The hydraulic oil in the system oil tank first enters the safety relief valve, and then enters the inlet hydraulic oil detection component through the safety relief valve.
5. The motor testing system for durability testing of a hydraulic motor according to claim 1, characterized in that... The sensor integrated valve is equipped with a first check valve and a second check valve. The hydraulic oil in the system oil tank enters the first check valve after passing through the inlet hydraulic oil detection component, and the hydraulic oil of the motor under test enters the second check valve after passing through the outlet hydraulic oil detection component.
6. The motor testing system for durability testing of a hydraulic motor according to claim 1, characterized in that... The system's oil tank is equipped with a liquid level sensor.
7. The motor testing system for durability testing of a hydraulic motor according to claim 1, characterized in that... The tested motor and the load motor are connected by a coupling, and the main pump supplies hydraulic oil to the load motor from the system oil tank.
8. The motor testing system for durability testing of a hydraulic motor according to claim 1, characterized in that... The durability test signal control terminal is connected to the mobile control terminal via a wireless signal.
9. A motor testing system for durability testing of a hydraulic motor according to claim 1, characterized in that... The durability test signal control terminal includes a control processor, a display screen, a control switch, and a wireless receiver / transmitter.