Design and research of a novel magnetorheological fluid coupling with cycloid corrugated surface

Abstract

This paper presents a new design of cycloid corrugated magnetorheological fluid (MR) coupling based on the magnetorheological shear-pressure mixing mode. The device optimizes the formation of the magnetic chain through an arcuate magnetically conductive surface and guides the magnetic circuit with a magnetic isolation ring, so that the mechanical characteristics of the magnetorheological fluid can be fully utilized to enhance the power torque transmission capability. After describing the structure, electromagnetic simulations were performed to verify the formation of magnetically sensitive lines on an arc-shaped surface. The metal rolling force calculation method based on Orowan unit pressure differential equation was used to establish a mechanical mechanism model of a magnetorheological fluid coupling with cycloid corrugated surface. The key parameters affecting the torque transfer performance of the MR coupling were calculated through Matlab software, and the performance of the device was evaluated. After that, the experimental platform was set up to test its performance. The experiment results indicate that the proposed MR coupling performs better than the conventional MR coupling with conventional planes in terms of torque output capability, transmission stability, and impact resistance, while maintaining a feasible magnetic circuit design and a compact structure.