Test device for electro-hydraulic speed regulator test

Abstract

The invention belongs to the technical field of mechanical test tool equipment, and particularly relates to an electro-hydraulic speed regulator test testing device. Comprising the steps that a virtual diesel engine model generates a signal and supplies the signal to a rotating speed controller, an alternating current power supply supplies power to a frequency converter to drive a motor to operate, and the rotating speed of the motor is transmitted to an electro-hydraulic speed regulator through a first coupler to drive a main pump in the electro-hydraulic speed regulator to build pressure; a hydraulic bridge circuit in the electro-hydraulic speed regulator acts to drive the output shaft to rotate, the output shaft transmits an output signal back to the virtual diesel engine model through the flywheel, the magnetic powder brake and the angle sensor, and the virtual diesel engine model feeds back the signal to the magnetic powder brake through the brake controller; and the output torque of the electro-hydraulic speed regulator is ensured to meet the operation requirement and is confirmed by the torque sensor. The electro-hydraulic speed regulator test device has the advantages that the electro-hydraulic speed regulator test device is provided with the outer circulation oil way, and the test requirements of various electro-hydraulic speed regulators can be met.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical test tooling equipment, and in particular relates to an electro-hydraulic speed regulator test device. Background Art

[0002] The main function of a diesel engine speed governor is to dynamically adjust the fuel supply to the diesel engine according to changes in external load, thereby ensuring the stability of the engine's operating speed. The performance of the speed governor directly affects the overall operating capability of the diesel engine, including response speed, fuel economy, and emission control. Therefore, an efficient and accurate speed governor design is essential to improving diesel engine performance.

[0003] At present, the mainstream electro-hydraulic speed governor receives electrical signals from the controller and uses the synergy of internal proportional solenoid valves, pilot slide valves, hydraulic amplification mechanisms and other components to accurately control the speed of the diesel engine. This control strategy improves the adaptability of the diesel engine under various working conditions and enhances its fuel efficiency and environmental performance.

[0004] At present, the matching of the control parameters of the electro-hydraulic speed governor with the diesel engine mainly relies on the traditional engine matching test. This method faces multiple technical challenges: first, the risk is high, because the speed governor needs to be directly installed on the actual diesel engine for testing, which may cause failure of the speed governor or the diesel engine, increase safety hazards and development costs; second, the efficiency is low. Due to the production schedule constraints of the OEM, it is difficult to achieve rapid iteration and technological innovation; third, the versatility is poor. Different models of diesel engines have different characteristics, and the matching test needs to be tested separately, further increasing the complexity and time cost of research and development.

[0005] In the prior art, some related patents have proposed improved test schemes. For example, CN203773247U and CN117405376A proposed a marine diesel engine governor test bench integrating an RTPC simulator, a variable frequency motor and a position encoder for dynamic performance testing. However, these systems are often targeted at specific types of diesel engines or application scenarios, which limits their versatility. In addition, the low-speed diesel engine electronic control hardware-in-the-loop test system developed by CN105425609B provides testing and virtual calibration for the electronic control system of the low-speed diesel engine, but does not achieve full integration of the electro-hydraulic governor.

[0006] There is also a nuclear power plant emergency diesel generator simulation device proposed in CN115598520A, which uses a motor assembly and a gearbox to detect the output shaft rotation angle of the speed control actuator to provide support for emergency situations. In addition, the intelligent ship host control system hardware-in-the-loop test system proposed in CN111532395B provides operation support for the intelligent ship host by simulating operating environments with different temperatures and humidity, which is relatively less relevant to the present invention.

[0007] At present, the testing methods of electro-hydraulic speed regulators mostly use hardware-in-the-loop simulation to test the speed controller and match the control parameters, but usually lack the actual feedback input of the speed actuator, resulting in high calibration costs and poor reliability of the actuator control parameters.

[0008] In summary, the existing technology still has many shortcomings in the control parameter matching and testing efficiency of the electro-hydraulic speed regulator. A new method is urgently needed to improve the matching efficiency, reduce the development risk and cost, so as to adapt to the ever-changing market demand and technological progress. Summary of the invention

[0009] The purpose of the present invention is to provide an electro-hydraulic speed regulator test device, which can effectively match the output of the actual actuator with the hardware-in-the-loop simulation, thereby reducing the cost of control parameter matching in the electro-hydraulic speed regulator matching test, improving reliability, and significantly reducing the risk and cost of electro-hydraulic speed regulator control parameter matching, while improving matching efficiency and versatility, providing a more reliable and efficient solution for the development and application of electro-hydraulic speed regulators.

[0010] The technical solution of the present invention is as follows: an electro-hydraulic speed governor test device, including a virtual diesel engine model generating a signal to supply a speed controller, an AC power supply to power a frequency converter to drive the motor to run, the speed of the motor is transmitted to the electro-hydraulic speed governor through a first coupling, and then the main pump inside the electro-hydraulic speed governor is driven to build pressure. Under the control of the speed controller, the hydraulic bridge circuit inside the electro-hydraulic speed governor is implemented to drive the output shaft to rotate, and the output shaft transmits the output signal back to the virtual diesel engine model through a flywheel, a magnetic powder brake and an angle sensor. The virtual diesel engine model feeds back a signal to the magnetic powder brake through a brake controller to ensure that the output torque of the electro-hydraulic speed governor meets the operating requirements, which is confirmed by the torque sensor.

[0011] The motor drives the oil pump through the second coupling to extract oil from the oil tank and supply it to the electro-hydraulic speed governor for testing. At the same time, the low-pressure oil in the electro-hydraulic speed governor returns to the oil tank, completing the closed loop of the external circulation oil circuit.

[0012] The electro-hydraulic speed regulator monitors the oil temperature and oil pressure inside the electro-hydraulic speed regulator in real time through the monitoring component.

[0013] The monitoring component comprises a pressure sensor and a temperature sensor. The threads of the pressure sensor and the temperature sensor are connected to the internal oil circuit of the electro-hydraulic speed regulator and are fixed to the control panel by screws.

[0014] The outer circulation oil circuit includes a clutch, and the motor cooperates with the oil pump through the clutch to realize automatic switching of the outer circulation oil circuit.

[0015] The virtual diesel engine model collects the signal of the angle sensor to calculate the fuel volume and speed of the diesel engine, and feeds the result back to the speed controller to provide speed input for the electro-hydraulic speed governor. At the same time, the speed controller provides a speed control electrical signal for the electro-hydraulic speed governor.

[0016] The virtual diesel engine model calculates the theoretical torque value of the electro-hydraulic speed governor and transmits it to the brake controller to verify that the output torque of the electro-hydraulic speed governor meets the operating requirements.

[0017] The first coupling is optionally equipped with a speed increasing gearbox to expand the test speed range of the electro-hydraulic speed regulator.

[0018] The beneficial effects of the present invention are as follows: the electro-hydraulic speed governor test device of the present invention is equipped with an external circulation oil circuit, which can meet the test requirements of various electro-hydraulic speed governors. By applying a virtual diesel engine model, the actual operating conditions are simulated, which effectively improves the high risk and high cost problems faced by traditional electro-hydraulic speed governors in adjusting control parameters during machine matching tests. At the same time, the device solves the problem of poor interchangeability of multiple types of speed governors, making the measurement of various performance indicators of the electro-hydraulic speed governor and the matching of diesel engine control parameters more efficient and accurate.

[0019] Economic value: The present invention can simulate the operation of diesel engines in various test environments such as steady-state conditions, variable load conditions, starting and stopping, etc. through a virtual diesel engine model. Its clutch design realizes the rapid automatic switching of the external oil circuit, and the speed increaser increases the speed range of the test bench according to the signal of the speed controller. This flexibility not only meets the test requirements of various electro-hydraulic governors, but also effectively reduces the overall cost of machine matching tests, expands the scope of application of electro-hydraulic governors, and improves economic benefits.

[0020] Practical value: (product application / test verification / calculation verification)

[0021] The invention adopts a multi-oil circuit design and realizes the rapid switching of the external oil circuit through the clutch, which can meet the test requirements of different specifications of electro-hydraulic governors under various working conditions. The virtual diesel engine model provides real and accurate test conditions, ensuring the reliability and effectiveness of the test results. It is widely used in product application, test verification and calculation verification, and has significant practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The present invention provides a schematic structural diagram of an electro-hydraulic speed regulator test device.

[0023] In the figure: 1 electro-hydraulic speed governor, 2 torque sensor, 3 flywheel, 4 magnetic powder brake, 5 angle sensor, 6 pressure sensor, 7 temperature sensor, 8 speed controller, 9 brake controller, 10 virtual diesel engine model, 11 AC power supply, 12 speed controller, 13 inverter, 14 motor, 15 first coupling, 16 second coupling, 17 oil pump, 18 oil tank, 19 speed increasing gear box, 20 clutch. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] At present, the control parameter matching of diesel engine electro-hydraulic speed governor mainly relies on the machine matching test. This method faces the following technical problems:

[0026] High risk: The engine matching test requires the electro-hydraulic governor to be directly installed on the actual diesel engine for testing, which may not only damage the governor, but also cause diesel engine failure. This risk significantly increases the cost and time of electro-hydraulic governor development and limits the safety and reliability of the test.

[0027] Low efficiency: The matching test is limited by the production schedule of the main engine factory, and the matching efficiency is low. This low efficiency makes it impossible for the speed regulator products to respond quickly to market demand, hindering the process of rapid iterative development and technological innovation.

[0028] Poor versatility: Different types of diesel engines have their own unique characteristics, and the engine matching test must be carried out separately for each diesel engine, which leads to a lack of versatility and flexibility, and increases the complexity and workload of the research and development of the electro-hydraulic governor.

[0029] The present invention aims to overcome the problems and shortcomings existing in the current engine matching test based on the prior art, and to provide an electro-hydraulic speed governor test device with a wide test range and strong versatility in combination with a virtual diesel engine model, thereby reducing the risk and cost of electro-hydraulic speed governor control parameter matching.

[0030] To achieve the above goals, Figure 1 As shown, the present invention provides an electro-hydraulic speed governor test device, wherein the virtual diesel engine model 10 provides a diesel engine speed signal to the speed controller 12, the frequency converter 13 is powered by the AC power supply 11 and controls the motor 14 to run, and the motor 14 is connected to the electro-hydraulic speed governor 1 through the first coupling 15. The speed controller 8 inputs a current signal to the electro-hydraulic speed governor 1, and the output shaft rotation angle signal of the electro-hydraulic speed governor 1 is fed back to the virtual diesel engine model 10 through the angle sensor 5. The virtual diesel engine 10 calculates the fuel supply according to the angle, and then obtains the speed of the diesel engine after speed regulation. The virtual diesel engine 10 transmits the speed signal to the motor frequency converter 13 through the speed controller 12 to achieve closed-loop control of the speed.

[0031] The virtual diesel engine 10 is a known product, and the model used in the present invention is HIL-71B, and it can also be other systems with key process parameter simulation of high-power diesel engines. Its specific function is to calculate the state of the simulated diesel engine in real time according to the collected data, and transmit the calculation results to the speed controller 8, the brake controller 9, the speed controller 12 and other auxiliary equipment through the interface.

[0032] According to one embodiment of the test device, the speed controller 12 receives the speed signal of the virtual diesel engine model 10 , the motor inverter 13 controls the motor 14 according to the signal of the speed controller 12 , and the motor 14 drives the electro-hydraulic speed governor 1 through the first coupling 15 .

[0033] According to an embodiment of the test device, the oil pump 17 and the motor 14 of the external oil circuit of the device cooperate with each other through the second coupling 16 and the clutch 20 to meet the switching of the external oil circuit.

[0034] According to an embodiment of the test device, the first coupling 15 of the device can be equipped with a speed increasing gearbox 19 as required to increase the test speed range of the device.

[0035] According to one embodiment of the test device, the pressure sensor 6 and the temperature sensor 7 of the device are arranged on the display panel of the device in cooperation with the electro-hydraulic speed regulator 1 through threads to monitor the oil temperature and oil pressure inside the electro-hydraulic speed regulator 1 in real time.

[0036] According to one embodiment of the experimental test device, the torque sensor 2 of the device is connected to the output shaft of the electro-hydraulic speed regulator 1 through a rocker arm to detect the torque of the electro-hydraulic speed regulator 1.

[0037] According to one embodiment of the experimental test device, the virtual diesel engine model 10 of the device collects the rotation angle signal of the output shaft of the electro-hydraulic speed governor 1 through the angle sensor 5, and calculates the fuel supply according to the angle, thereby obtaining the speed of the diesel engine after speed regulation and feeding it back to the speed controller 8 to realize speed closed-loop control.

Claims

1. An electro-hydraulic speed regulator test device, characterized in that: The method includes generating a signal from a virtual diesel engine model and supplying it to a speed controller. The AC power supply supplies power to the frequency converter to drive the motor to run. The speed of the motor is transmitted to the electro-hydraulic speed governor through the first coupling, thereby driving the main pump inside the electro-hydraulic speed governor to build up pressure. Under the control of the speed controller, the hydraulic bridge inside the electro-hydraulic speed governor is actuated to drive the output shaft to rotate. The output shaft transmits the output signal back to the virtual diesel engine model through the flywheel, the magnetic powder brake and the angle sensor. The virtual diesel engine model feeds back the signal to the magnetic powder brake through the brake controller to ensure that the output torque of the electro-hydraulic speed governor meets the operating requirements, which is confirmed by the torque sensor.

2. The electro-hydraulic speed regulator test device according to claim 1, characterized in that: The motor drives the oil pump through the second coupling to extract oil from the oil tank and supply it to the electro-hydraulic speed governor for testing. At the same time, the low-pressure oil in the electro-hydraulic speed governor returns to the oil tank, completing the closed loop of the external circulation oil circuit.

3. The electro-hydraulic speed regulator test device according to claim 1, characterized in that: The electro-hydraulic speed regulator monitors the oil temperature and oil pressure inside the electro-hydraulic speed regulator in real time through the monitoring component.

4. The electro-hydraulic speed regulator test device according to claim 3, characterized in that: The monitoring component comprises a pressure sensor and a temperature sensor. The threads of the pressure sensor and the temperature sensor are connected to the internal oil circuit of the electro-hydraulic speed regulator and are fixed to the control panel by screws.

5. The electro-hydraulic speed regulator test device according to claim 2, characterized in that: The outer circulation oil circuit includes a clutch, and the motor cooperates with the oil pump through the clutch to realize automatic switching of the outer circulation oil circuit.

6. The electro-hydraulic speed regulator test device according to claim 1, characterized in that: The virtual diesel engine model collects the signal of the angle sensor to calculate the fuel volume and speed of the diesel engine, and feeds the result back to the speed controller to provide speed input for the electro-hydraulic speed governor. At the same time, the speed controller provides a speed control electrical signal for the electro-hydraulic speed governor.

7. The electro-hydraulic speed regulator test device according to claim 1, characterized in that: The virtual diesel engine model calculates the theoretical torque value of the electro-hydraulic speed governor and transmits it to the brake controller to verify that the output torque of the electro-hydraulic speed governor meets the operating requirements.

8. The electro-hydraulic speed regulator test device according to claim 3, characterized in that: The first coupling is optionally equipped with a speed increasing gearbox to expand the test speed range of the electro-hydraulic speed regulator.

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