| 摘要 |
PURPOSE:To reduce damage and wear of parts and impart a temperature characteristic to action of a device, by constituting the device from a fluid pressure receiving part, pressure control part, pressure diffusion part, sheathed unit of non-magnetic material, magnetic field applying means and magnetic fluid. CONSTITUTION:If assumed that pressure exceeds blocking force of magnetic fluid 6, the magnetic fluid 6 is scattered by this pressure, in this way, a gap 21 opened, and excessively large pressure is diffused to the outside air through a filter 32 from a pressure diffusion chamber 31. Pressure in a pressure vessel 7 is reduced, if restored to normal, the magnetic fluid 6 is reset to the gap 21 and adsorptively fixed again to said gap 21, then this safety valve device can be automatically restored to the initial condition. The magnetic fluid 6 can be reset to the gap 21 by attracting action of the magnetic field applied to the gap 21. |
