Properties of clutch using thixotropic MR fluid with surfactants

Shinzo Takata; Kenjiro Hosoo; Yoshimasa Inoue; Ryoichi Hanaoka; Tadashi Fukami; Kazuo Shima

doi:10.1117/12.779774

1 November 2007 Properties of clutch using thixotropic MR fluid with surfactants

Shinzo Takata, Kenjiro Hosoo, Yoshimasa Inoue, Ryoichi Hanaoka, Tadashi Fukami, Kazuo Shima

Proceedings Volume 6423, International Conference on Smart Materials and Nanotechnology in Engineering; 64231X (2007) https://doi.org/10.1117/12.779774
Event: International Conference on Smart Materials and Nanotechnology in Engineering, 2007, Harbin, China

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.

Citation Download Citation

Shinzo Takata, Kenjiro Hosoo, Yoshimasa Inoue, Ryoichi Hanaoka, Tadashi Fukami, and Kazuo Shima "Properties of clutch using thixotropic MR fluid with surfactants", Proc. SPIE 6423, International Conference on Smart Materials and Nanotechnology in Engineering, 64231X (1 November 2007); https://doi.org/10.1117/12.779774

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