公开(公告)号：EP4321778A1

公开(公告)日：2024-02-14

申请号：EP22784615.1

申请日：2022-03-30

申请人： EagleBurgmann Japan Co., Ltd.

发明人： NAKAMURA, Ryo

IPC分类号： F16J15/16 ,  F16J15/34

摘要： 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.