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Proceedings Paper

Properties of clutch using thixotropic MR fluid with surfactants
Author(s): Shinzo Takata; Kenjiro Hosoo; Yoshimasa Inoue; Ryoichi Hanaoka; Tadashi Fukami; Kazuo Shima
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Paper Abstract

Properties of a magnetorheological (MR) clutch have been investigated using newly developed MR fluids (suspensions) which consist of the carbonyl iron particles and thixotropic carrier fluid. The carrier fluid is composed of a rapeseed ester oil (vegetable oil) and synthetic smectite. The dependences of an output torque of the clutch on the applied magnetic field were examined under a fixed input torque for different densities of particles, surfactant or smectite in the MR fluids. The thixotropic behavior of the carrier fluids also was evaluated using a rheometer of the coaxial cylinder type. As for the MR fluid of 81wt% particles with 7wt% smectite, the output torque of the clutch increased with increases of the surfactant in the range of 0 to 5 wt%. On the other hand, the thixotropic effect was lost gradually with increase of the surfactant over 5wt% at the smectite concentration of 7wt%, but the output torque increased with increasing the surfactant accompanying by particles sedimentation. The sedimentation could be suppressed by the increase of the smectite concentration without decreasing of the output torque. As a result, the output torque reached to 57Nm by controlling the content of the surfactant and smectite in the MR fluids.

Paper Details

Date Published: 1 November 2007
PDF: 6 pages
Proc. SPIE 6423, International Conference on Smart Materials and Nanotechnology in Engineering, 64231X (1 November 2007); doi: 10.1117/12.779774
Show Author Affiliations
Shinzo Takata, Kanazawa Institute of Technology (Japan)
Kenjiro Hosoo, Kanazawa Institute of Technology (Japan)
Yoshimasa Inoue, Kanazawa Institute of Technology (Japan)
Ryoichi Hanaoka, Kanazawa Institute of Technology (Japan)
Tadashi Fukami, Kanazawa Institute of Technology (Japan)
Kazuo Shima, Kanazawa Institute of Technology (Japan)

Published in SPIE Proceedings Vol. 6423:
International Conference on Smart Materials and Nanotechnology in Engineering
Shanyi Du; Jinsong Leng; Anand K. Asundi, Editor(s)

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