单向阀式汽车磁流变减振器磁路设计与试验

Design and Experimental of the Magnetic Circuit of Vehicle MRF Damper with Check Valve

针对汽车双筒磁流变减振器工作出现的外特性畸变现象,在传统磁流变减振器活塞结构基础上,设计了一种具有流通孔和单向阀、非旋转体的新型电磁活塞,并分析了活塞磁路的理论计算方法。根据单向阀式活塞的非旋转体特点,应用Ansys有限元分析软件基于单元边法的Solid117单元建立1/4三维有限元磁路仿真模型,进行三维静态磁场分析。设计制造了新型电磁活塞,应用特斯拉计进行活塞阻尼通道的磁路试验,对比磁路的三维仿真,理论计算与试验数据基本吻合,表明新型活塞磁路的三维仿真与理论计算是正确的。按照某款汽车技术要求设计加工了磁流变减振器,进行了阻尼特性试验,结果显示,示功曲线非常饱满,有效地消除了外特性畸变,表明设计的单向阀式电磁活塞是可行有效的。

According to the performance distortion of a vehicle twin-tube magnetorheological fluids(MRF) damper,a new type of non-rotary body electromagnetic piston with circulation and check valve is designed based on the traditional piston structure,and the theoretical calculation method of magnetic circuit is analyzed.According to the non-rotary body characteristics of the piston,a 1/4three-dimensional finite element magnetic circuit simulation model is established with the ANSYS edge-based Solid117element,and the three-dimensional static magnetic field is analyzed.The new piston of MRF damper is designed and manufactured,and the piston damping channel magnetic circuit is tested,the results show that the threedimensional simulation,the theoretical calculations,and the experimental data are consistent,and the three-dimensional simulation and the theoretical calculations of the magnetic circuit are correct.The MRF damper is designed in accordance with the requirements of techniques of a car,and the damping characteristic is tested.The results show that the damper noise source is eliminated,and that the electromagnetic piston structure with check valve is effective.