Abstract
A differential motion restraint coupling is presented. In order to have strong torque, multi friction plates are installed in the friction unit of the device that involves magnetorheological fluid. Two permanent magnets lie on both sides of the friction unit. Hence, magnetic fluxes freeze the magnetorheological fluid. The friction discs have a number of slits in the radial direction, which generate torque due to shear forces between the frozen fluid and the slits. A design method has been presented for the device. To validate the present design formulae, experimental tests have been carried out. Calculated results are in good agreement with the experimental ones.
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