There is provided a shaft sealing device in which a leakage of a sealed fluid to a leakage side space can be easily repaired. A shaft sealing device 1 sealing a sealed fluid includes a mating ring 5 having a sliding surface 51 and attached to a casing 4 into which a rotating shaft 3 is inserted, a commonly used seal ring 6 having a sliding surface 62a that slides against the sliding surface 51 of the mating ring 5, and attached to the rotating shaft 3, and the sliding surfaces 51 and 62a, and a backup seal ring 7 attached to the rotating shaft 3 on a counter-sealed fluid side in an axial direction with respect to the sliding surface 51 of the mating ring 5 and the sliding surface 62a of the commonly used seal ring 6, and having a sliding surface 72a facing the sealed fluid in the axial direction. The backup seal ring 7 is movable toward the sealed fluid in the axial direction.


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    Title :

    SHAFT SEALING DEVICE


    Additional title:

    WELLENDICHTUNGSVORRICHTUNG
    DISPOSITIF D'ÉTANCHÉITÉ D'ARBRE


    Contributors:

    Publication date :

    2025-03-19


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    F16J Kolben , PISTONS / B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING



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