In this paper, a rotary MR damper with T-shape rotor used for automobile scissors type seat suspension is developed. The T-shape rotor is composed of left and right magnetic sleeves, a middle magnetic disk, a non-magnetic sleeve and a non-magnetic ring. Meanwhile, this structure enables the damper to form six effective fluid flow channels. The structure and working principle of the rotary MR damper are described, its magnetic circuit is analyzed, and the mathematical model of output damping torque is also established. Then, in order to investigate the magnetic flux distribution and magnetic flux density of the rotary MR damper, the ANSYS software is employed to simulate its electromagnetic field. Moreover, according to the torque performance test, the variation of the output damping torque with current and speed is explored, and the experimental results showed that the maximum output torque is about 11.8 Nm under the applied current of 2 A and the rotational speed of 120 r/min. The model of the scissor seat suspension is built for the damping performance test, and the experimental results revealed that the peak damping force of the scissor seat suspension is about 350 N under the applied current of 2 A, the vibration amplitude of 15 mm and the vibration frequency of 0.5 Hz.

本文研制了一种用于汽车剪刀式座椅悬架的T型转子旋转磁流变阻尼器。T型转子由左右磁套、中磁盘、无磁套和无磁环组成。同时，这种结构使阻尼器可以形成六个有效的流体流动通道。介绍了旋转磁流变阻尼器的结构和工作原理，分析了其磁路，建立了输出阻尼转矩的数学模型。然后，为了研究旋转磁流变阻尼器的磁通分布和磁通密度，采用ANSYS软件对其电磁场进行仿真。此外，根据扭矩性能测试，探索了输出阻尼扭矩随电流和速度的变化，实验结果表明，在施加2 A电流和120 r/min转速下，最大输出扭矩约为11.8 Nm。搭建剪刀式座椅悬架模型进行阻尼性能测试，实验结果表明，剪刀式座椅悬架在施加2 A电流、15 mm振幅、 0.5赫兹的振动频率。