Development and performance evaluation of rotary magnetorheological damper with T-shape rotor for seat suspension

• DOI: 10.1007/s40430-021-03298-6
• Publication Date: 2021-11-27T12:02:26Z
• Authors: Qiang Zuo; Feng Zhou; Han Zheng; Gang Li; Guoliang Hu
• Keywords: 02 engineering and technology; 0210 nano-technology

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.