MRバルブの流量特性に関する検討

概要

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The MR fluid has the characteristic that the viscosity is changed by the state of the magnetic field. The MR fluid valve with the fluid has been examined as a device to expect a control valve promptly and conveniently. Generally the MR fluid valve is designed to add magnetism vertically in the direction of the flow. The reason is based on the theory that the cluster formed in the same direction as a vertical magnetic field causes flow resistance. Along the lines of this theory, varieties of MR fluid valve structures has been proposed. However, it thought that there are problems in the versatility because each structure is complicated. We manufactured some experimental MR fluid valves with a simple orifice inside, where bobbin type electromagnets apply magnetic fields. The research target is that the basic characteristics of the valves are tested with the flow characteristic test equipment and applications of the valves to practical use are examined. In this report, we explain the results that the shape of the orifice, the relative magnetic permeability of the valve material, the applied method of magnetic field etc. have on the flow characteristics. We also analyze the principle of the effect on the valves with the use of magnetic field analysis.
社団法人　日本フルードパワーシステム学会の論文
2006-11-15