Preparation Method and Simulation Analysis of a Novel High Temperature Resistant Magnetorheological Fluidier Fluids

Magnetorheological fluid (MRF) is a suspension system formed by micron- of carrier liquid on the properties of MRFs at high temperature were studied. On thissized magnetic particles and additives uniformly dispersed in a non-magnetic carrier liquid. Under an external magnetic field, MRF transforms from an initial free-flowing liquid to semi-solid or even solid in millisecond time, showing strong controllable rheological characteristics, and is therefore widely used in vibration damping devices. Since the heating of energized coil and the friction between particles, the rheological properties of MRF applied to high-power MR devices are usually affected by the increase of the temperature. Poor temperature stability of MRF manifests itself as a reduced shear yield stress at high temperatures, affecting device performance. In order to prepare MRFs with stable properties at high temperature, the effects basis, a novel MRF with good temperature stability was prepared. The dispersion stability, evaporation rate, expansion rate and shear yield stress at high temperature were studied. Then the influence mechanism of these properties is explored through simulation analysis. The results show that the novel MRF has good dispersion stability, stable viscosity and shear yield stress. The influence mechanism of temperature on the properties of this MRF was obtained. This novel MRF with good temperature stability can be applied to the most MR devices, especially to high-power MR devices.