永久磁石を用いたMR流体耐久試験装置の開発と評価

抄録

Particle sedimentation is one of drawbacks for conventional magnetorheological fluids (MRF). To solve this problem, Kurimoto Co. Ltd. has developed Soft-MRF by using sub-micron order magnetic particles. This material has stable particle depressiveness over several months. However, its durability has not been fully discussed in previous studies. Therefore, we developed a new test equipment for durability test. Measurement magnetic flux density and analytic ones are evaluated, and they showed less 5% error. At the time of MRF-140CG filling, as for the torque, the measurement rose 10% than a calculation.