| 摘要 |
The present invention provides a magnetic fluid seal device which enables to avoid the increase of the torque due to the aggregation of the solute of the magnetic fluid or the condition in which it is unable to start. According to the magnetic fluid seal device of the present invention, the hearer 151 is buried in the area where the magnetic fluid seal portion 140 is position inside the shaft 110. The torque meter 171 detects the rotation torque and the starting torque of the shaft 110, and when it is larger than the standard value, the magnetic fluid seal portion 140 is heated via the heater 151 inside the shaft 110. Thereby, the temperature of the magnetic fluid 146 and 147 rises, the solute of the magnetic fluid 146 and 147 is dispersed which lowers the viscosity thereof, and the rotation torque and the starting torque of the shaft 110 is lowered.
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