A sealing device and a method of repairing/replacing sealing...

F - Mech Eng,Light,Heat,Weapons – 16 – J

Patent

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Details

F16J 15/18 (2006.01) F04D 29/10 (2006.01)

Patent

CA 2352741

A sealing device (20), optionally in the form of a kit is provided for sealing about a rotatable member such as a shaft (22), includes a follower housing (32) for mounting about the rotatable member (22) with an axial direction of the follower housing (32) aligned with the rotational axis of the rotatable member (22). Further, a follower (40) is provided for compressing a primary sealing means such as packing (28) for sealing against the rotatable member (22). The follower (40) is slidable within the follower housing (32) generally in axial direction and has sliding interfaces (54, 56) for interfacing with the follower housing (32) and/or the rotatable member (22). There is also a chamber (68) or simply a recess defined by the housing (32) and a pressure face of the follower (40), with the chamber/recess having means (70) to receive fluid. Secondary sealing means are also provided at the sliding interfaces (56) for sealing against the egress of fluid in use, from the chamber/recess (68) along the sliding interfaces (56) of the follower.

L'invention porte sur un dispositif d'étanchéité (20) pouvant se présenter sous la forme d'un kit pour sceller le pourtour d'un élément rotatif, tel qu'une tige (22). Le dispositif d'étanchéité comprend un boîtier mobile (32) qui se monte autour de l'élément rotatif (22), une direction axiale du boîtier mobile (32) étant alignée avec l'axe de rotation de l'élément rotatif (22). En outre, un galet (40) sert à comprimer un moyen de scellement primaire, tel qu'un bourrage (28), qui vient se coller contre l'élément rotatif (22). Le galet (40) peut coulisser à l'intérieur du boîtier mobile (32), généralement dans un sens axial, et comporte des interfaces à glissières (54, 56) jouant un rôle d'interface avec le boîtier mobile (32) et/ou l'élément rotatif (22). Le dispositif d'étanchéité comprend également une chambre (68) ou un simple évidement délimité par le boîtier (32) et une face de pression du galet (40). Cette chambre ou cet évidement inclut un moyen (70) de réception de liquide. Des moyens de scellement secondaires équipent également les interfaces à glissières (56) pendant l'utilisation, pour assurer une étanchéité contre la sortie du liquide provenant de la chambre/évidement (68) le long des interfaces à glissières (56) du galet.

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