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旋转轴的磁性密封是应用磁性流体粘附于永久磁铁的特性,在支承与轴之间充填磁性流体并形成强大的磁性回路,从而起到密封作用的。磁性流体(Magnectic Pluid)是美国宇宙航空局(NASA)1965年发明的。当时主要用于宇航服的密封。它是铁磁性的金属微粒子和油或水混合成胶体状的液体。
The magnetic seal of the rotating shaft is a magnetic fluid applied to the permanent magnet properties, filling the magnetic fluid between the support and the shaft and form a strong magnetic circuit, which play a sealing role. Magnectic Plugs was invented by NASA in 1965. At that time was mainly used for spacesuit seals. It is ferromagnetic metal particles and oil or water mixed into a colloidal liquid.