Simulation and Experiment of Static Characteristics of Pilot-operated Electro-hydraulic Proportional Relief Valve
Pilot-operated electro-hydraulic proportional relief valve is a pressure control valve that is used to control the oil pressure in the system.It can control the electromagnetic force with electric signal according to the requirements of working conditions,so as to achieve the pressure control of the hydraulic system,and is composed of pilot valve,main valve and hand-adjustable safety valve.Due to the control valve port flow state is complex,the use of flow experience formula and the traditional hydrodynamic formula is difficult to accurately calculate the orifice flow and spool hydrodynamic force,resulting in large differences between the mathematical model calculations and the experiments.In order to accurately obtain the static characteristics of the relief valve,the Fluent software is used to simulate the flow field of the main valve and pilot valve to obtain the spool force and orifice flow under different orifice openings and differential pressures.The interpolation model is obtained by interpolating the spool force and orifice flow,according to which the static mathematical model is solved to obtain the static characteristic curve of the relief valve.The results show that the static characteristic curve obtained from the interpolation model is more consistent with the experiment curve.
electro-hydraulic proportional relief valveflow field simulationinterpolation modelstatic characteristic simulationexperiment