Research On Multiphysics Coupling Simulation And Optimal Design Of Large Flow And High Speed Solenoid Valve

Large flow and high speed solenoid valve is the key control component of electro-hydraulic servo control system.It is widely used in modern electro-hydraulic servo control field.The on-off valve with solid performance indicators such as flow rate and response speed can replace complex and high cost in certain application fields.Proportional valves and servo valves.Therefore,large flow and high speed valves are one of the main development directions of solenoid valves.In addition,the solenoid valve is a complex system of mechanical-electricity-magnetism-hydraulic-heat coupling.In the performance optimization design,it is difficult to obtain the optimal performance parameters of the solenoid valve by using a single physical field modeling.Therefore,this paper uses finite element modeling technology to establish a multi-physics coupling simulation model of a large-flow high-speed solenoid valve,and conducts optimization design research and experimental verification of its static and dynamic working characteristics.Firstly,this paper takes a high-flow high-speed solenoid valve based on the principle of remanence locking as the research object,and analyzes its structural characteristics,working principle and mathematical mechanism of multi-physics coupling.The multi-physics coupling dynamic simulation model of the solenoid valve was established by using the finite element software COMSOL＿Multiphysics,and a test bench for the working characteristics of the solenoid valve was built to carry out performance tests and complete the verification of the accuracy of the model.Secondly,combined with the working principle of the remanence locking of the solenoid valve,aiming at ensuring the large flow characteristic of the solenoid valve,the influencing factors of its dynamic response characteristics are analyzed.Using the multi-physics coupling simulation model,the simulation optimization design is carried out from the aspects of the magnetic circuit of the solenoid valve and the inertia of the spool motion.The optimization results show that under the rated working condition of differential pressure of 1MPa,the dynamic response time is shortened from 4.08 ms to 2.24 ms,and the flow rate is 58.75L/min.Under the background of greatly improving the response speed of the solenoid valve,the characteristics of large flow rate are maintained.Finally,the optimized solenoid valve processing and assembly are completed,and the performance verification test is carried out.The test results show that the static electromagnetic force of the solenoid valve increases by 84.06% on average under different air gaps;the dynamic response time is 2.06 ms under no-load working conditions and 2.32 ms under load conditions,which are 27.72% and 44.76% higher than those before optimization respectively,compared with the simulation results,the errors are 2.91% and 3.45%respectively;there is no significant change in the flow rate and temperature rise characteristics.The optimized solenoid valve can achieve high response speed in the context of large flow,providing a reference for the application of large flow and high-speed electro-hydraulic control systems such as engine electro-hydraulic variable gas distribution.