F - Mech Eng,Light,Heat,Weapons – 16 – J
Patent
F - Mech Eng,Light,Heat,Weapons
16
J
F16J 15/40 (2006.01)
Patent
CA 2682004
The invention relates to a sealing device (12) that ensures tightness between a casing (10) and a shaft (14) rotatingly mounted in said casing (10), that comprises first (24) and second (26) seals with an annular lip to be positioned axially side by side between the casing (10) and the shaft (14). The invention is characterised in that the device further includes means (45, 46, 48) for feeding a pressurised gas flow into the annular chamber (38) defined by the first lip seal (24), the second lip seal (26) and an outer surface of the shaft (22) so that, during the rotation of said shaft (22) the gas flow (F, F1, F2) is capable of slightly separating at least one of the lip seals (24, 26) from the outer surface (22) of the shaft (14) in order to flow out of the chamber (38).
L'invention concerne un dispositif d'étanchéité (12) pour assurer l'étanchéité entre un carter (10) et un arbre (14) monté rotatif dans ledit carter (10), comprenant des premier (24) et second (26) joints à lèvre annulaires destinés à être disposés axialement côte à côte entre le carter (10) et l'arbre (14). L'invention se caractérise en ce que le dispositif comporte en outre des moyens (45,46,48) pour amener un flux de gaz (F) pressurisé dans une cavité annulaire (38) délimitée par le premier joint à lèvre (24), le second joint à lèvre (26) et une surface extérieure de l'arbre (22), de telle sorte que lors de la rotation dudit arbre (14), le flux de gaz (F,F1,F2) est apte à faire légèrement décoller au moins l'un des deux joints à lèvre (24,26) de la surface extérieure (22) de l'arbre (14) pour s'écouler hors de la cavité (38).
Fos Monique
Labarthe Franck
Goudreau Gage Dubuc
Turbomeca
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