Abstract
The viscoplastic flow of magnetorheological fluid in a disc was analyzed based on the Navier–Stokes Momentum Equation, and the yielded and unyielded decomposition surfaces were obtained. For the shear-thinning phenomenon of magnetorheological fluid, the magnetorheological properties of the magnetorheological fluid were described based on the Herschel–Bulkley model. Then, the relationship between torque, magnetic field, material, size and motion was established, and the magnetic field and working gap were optimized and analyzed. The results show that in the unyielding region, the magnetorheological fluid flows rigidly. In the yielding region, it flows as a viscous fluid. The degree of error of the proposed torque equation decreased gradually with the increase to current, as observed by experimental comparison.
Highlights
Magnetorheological fluid (MRF) is a solid–liquid two-phase smart material whose rheological properties are controlled by an applied magnetic field
Was from the value measured by the torque sensor
Derived from the value measured by the torque sensor
Summary
Magnetorheological fluid (MRF) is a solid–liquid two-phase smart material whose rheological properties are controlled by an applied magnetic field. It consists of a base fluid, additives and micron-sized magnetic particles uniformly distributed in the base fluid [1]. As the magnetorheological effect transformation is reversible and easy to control, rapid response and other characteristics give MRF in the field of transmission an extensive range of application prospects [3]. Are a new class of power transfer devices based on the rheological effect that use MRF as the power transfer medium and regulate torque through an applied magnetic field to achieve the purpose of output control [4,5] Magnetorheological (MR) clutches, MR dampers, MR brakes, etc. are a new class of power transfer devices based on the rheological effect that use MRF as the power transfer medium and regulate torque through an applied magnetic field to achieve the purpose of output control [4,5]
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