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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。
Aiming at the problem of low utilization rate of magnetic field in traditional MR damper, a MR damper based on multi-stage radial flow mode is proposed. Magnetorheological fluid as a control medium to study its rheological and magnetization characteristics; select the appropriate soft magnetic materials, using polynomial description of its magnetization properties, and identify the corresponding parameters. According to the dynamic magnetic circuit design theory, the magnetic circuit analysis model is established to determine the theoretical relationship between the magnetic flux density and the excitation current of the excitation coil in the working gap. In order to verify the correctness of the theoretical derivation, the magnetic circuit in the damper was simulated by finite element analysis software. According to the technical requirements of anti-snake shock absorber for rail vehicle, a multi-stage radial flow mode magnetic flow Variable vibration damper, the use of model A1322ELHLT-T3 Hall sensor to measure the magnetic induction of its working gap, and the theoretical results were compared.