Magnetic fluid retainer, and shaft sealer employing same
    12.
    发明授权
    Magnetic fluid retainer, and shaft sealer employing same 失效
    磁性流体保持器和采用其的轴封装置

    公开(公告)号:US4989885A

    公开(公告)日:1991-02-05

    申请号:US484472

    申请日:1990-02-22

    CPC classification number: F16J15/40

    Abstract: Apparatus for sealing a magnetic shaft includes a magnetic housing having a throughbore with a stepped enlargement at one end, a pair of annular disk-shaped yokes spaced apart by an axially magnetized permanent magnet positioned in the stepped enlargement and surrounding the shaft, and magnetic fluid in the gaps between the yokes and the shaft. The outside diameter of one yoke is spaced from the magnetic housing and is smaller than the outside diameter of the other yoke, while the larger yoke abuts the magnetic housing at its outside diameter. A plastic, non-magnetic member can separate the smaller diameter yoke from the magnetic housing.

    Abstract translation: 用于密封磁轴的装置包括:磁性壳体,其具有在一端具有阶梯式放大的通孔,一对由位于阶梯式放大中并围绕该轴的轴向磁化的永久磁铁隔开的环形盘形磁轭和磁性流体 在轭和轴之间的间隙中。 一个磁轭的外径与磁性壳体间隔开,并且小于另一磁轭的外径,而较大的磁轭在其外径处与磁性壳体相接。 塑料的非磁性构件可以将较小直径的轭与磁性壳体分开。

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