Pressure resistant static and dynamic expeller shaft sealing

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

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F16J 15/00 (2006.01) F16J 15/16 (2006.01) F16J 15/54 (2006.01)

Patent

CA 2527865

A shaft sealing assembly (100) for static and dynamic axial sealing of a centrally located rotatingly movable shaft (10). The assembly (100) comprises at least one first sealing member (8) sealing said shaft (10), at least one rotor member (3,6) attached to said shaft (10), and a stator member (1) attached to a housing (30). A first sealing member (8) is arranged in a recess (7) in said rotor member (3) effectively sealing one side of the assembly (100) from its other side when a pressure difference is existing between the media on the two sides. Upon rotation of the shaft (10), the static sealing member (8) is centrifugally moved axially and radially away out of its static sealing position and friction between the sealing member (8) and the stator (1) is eliminated. Dynamic sealing is effected by a pressure difference caused by a turbine effect of the rotor member (3, 6).

La présente invention concerne un ensemble d'étanchéité d'arbre (100) conçu pour permettre l'étanchéité axiale statique et dynamique d'un arbre positionné de manière centrale et susceptible de tourner (10). Ledit ensemble (100) comporte au moins un premier élément d'étanchéité (8) assurant l'étanchéité dudit arbre (10), au moins un élément rotor (3, 6) fixé audit arbre (10), et un élément stator (1) fixé à un logement (30). Un premier élément d'étanchéité (8) est disposé dans un évidement (7) ménagé dans ledit élément rotor (3), assurant une étanchéité efficace d'un côté de l'ensemble (100) par rapport à son autre côté lorsqu'une différence de pression existe entre les milieux présents sur les deux côtés. Lors de la rotation de l'arbre (10), l'élément d'étanchéité statique (8) se déplace de manière centrifuge axialement et radialement de manière à s'éloigner de sa position d'étanchéité statique et le frottement entre l'élément d'étanchéité (8) et le stator est supprimé. L'étanchéité dynamique est obtenue au moyen d'une différence de pression générée par un effet de turbine de l'élément rotor (3, 6).

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