基于ANSYS的EP电磁阀静态性能仿真分析

针对EP阀轴对称的结构特点,建立有限元分析模型。考虑电磁材料非线性及漏磁因素的影响,采用微分标量势法(DSP)对旅客列车电空制动系统中EP电磁阀三维静态性能进行仿真分析。结果表明,电磁阀的安匝数、工作气隙、非工作气隙等设计参数是影响电磁阀性能的主要参数。额定电流为450 mA、线圈匝数为3 200、工作气隙和非工作气隙分别为2 mm和0.2 mm时,EP阀各项性能最优。为了减小加工工艺对EP阀工作性能的影响,磁铁和阀罩的同轴度应控制在8级,铁芯外径表面粗糙度应抛光至0.8μm。试验表明按照仿真方法设计的EP阀,其各项性能指标均达到了设计要求。

Simulation Analysis on Static Performance of EP Solenoid Valves Based on ANSYS

In order to study the 3D static performance of EP solenoid valves in the electro-pneumatic braking system of a passenger train, the 3D FEM model and mathematical model were established according to axisymmetric structural feature. The nonlinear of the electro-magnetic material and flux leakage were considered, and the differential scalar potential strategy (DSP strategy) was adopted in this paper. The simulation result shows that coil current, coil turn number, the lengths of work air gap and no-work air gap are key parameters affecting static behavior of EP solenoid valve. When rated current is 450 mA, and turn number is 3 200, and the lengths of work air gap and no-work air gap are 2 mm and 0.2 mm respectively, the actuator performance is optimal. In order to lessen the effect of the machining process, the coaxality between valve head and iron core and surface roughness of iron core should be controlled within level 8 and 0.8 m respectively. A prototype was made and tested, test data shows its properties meet design requirements.