Structural Design and Experimental Study of a Rotary Magnetorheological Damper with Higher Torque to Volume Ratio

A rotary magnetorheological damper with higher torque to volume ratio based on shear and flow mixing was designed. This structure adopts a mixed working mode of shear and flow, fully combining the advantages of the two working modes. A damping torque mechanical model of a rotary magnetorheological damper was established based on the parallel plate flow model of fluid and the Bingham model of magnetorheological fluid. And the magnetic circuit was simulated and analyzed using ANSYS, and the mechanical properties were simulated and calculated. The simulation results indicate that the magnetorheological damper has a higher output damping force and a wider controllable damping range. A rotary magnetorheological damper was developed and its performance was tested. The experimental results indicate that the damper has a higher torque to volume ratio, which verifies the effectiveness of the rotary magnetorheological damper and mechanical model proposed in this paper. The work of this article provides a theoretical basis for designing a rotary magnetorheological damper with higher torque to volume ratio.