磁流变液减振器的磁路设计方法研究

针对传统的磁流变减振器磁场利用率不高的问题,提出了一种基于多级径向流动模式的磁流变减振器。以磁流变液作为控制介质,研究其流变学特性与磁化特性;选择相应的软磁材料,利用多项式描述其磁化特性,并辨识相应的参数。根据动态磁路设计理论,建立磁路分析模型,确定工作间隙内磁感应强度与励磁线圈激励电流的理论关系。为了验证理论推导的正确性,利用有限元分析软件对阻尼调节器内的磁路进行仿真,并按照轨道车辆抗蛇行减振器的技术要求,设计制作了基于多级径向流动模式的磁流变减振器,利用型号为A1322ELHLT-T3的霍尔传感器对其工作间隙的磁感应强度进行检测,与理论结果进行对比分析。

Design method of magnetic circuit for Magnetorheological Fluid Shock Absorber

Due to problems of low magnetic field utilization of Magneto-rheological(MR) fluid shock absorber,a MR fluid shock absorber based on multi-radial flow mode is put forward.As the controlled media,rheologic characteristics and magnetization performance of MR fluid are studied.The magnetization performance parameters of the selected magnetic materials have been identified by the least square regression method.Based on the magnetic theory,the equivalent magnetic circuit model is derived,along with the expression of the relationship between the magnetic induction of the working gap and the exciting current of the field coil.In order to verify rationality of theory,the simulation is given by finite element method for the magnetic path in the MR valve.A kind of MR fluid shock absorber based on multi-radial flow mode is designed and fabricated according to technical requirements of railway vehicle anti-yaw shock absorber.The magnetic induction at the working gap which compared with theoretical values are tested by the Hall sensor of A1322ELHLT-T3.