Face seal with double groove arrangement

Details Face seal with double groove arrangement Face seal with double groove arrangement

F - Mech Eng,Light,Heat,Weapons

16

J

F16J 15/34 (2006.01)

Patent

CA 2147739

2147739 9506212 PCTABS00036 A non-contacting grooved face seal for a shaft rotating at high speed with a combination of two groove patterns (34, 44) on one of the two sealing faces of mating seal rings; one pattern being relatively deep angled grooves (34), and the other pattern being relatively shallow grooves (44). The relatively deep groove pattern (34) is optimized for hydrodynamic operation and on shaft rotation pumps the sealed fluid between the sealing faces to set the running clearance. The relatively shallow pattern (44) is designed to hydrostatically prevent a friction lock of the sealing faces when the shaft is at or near to a stationary condition.

Un joint tournant rainuré sans contact pour un arbre tournant à vitesse élevée comporte deux configurations combinées de rainures (34, 44) sur l'une des deux faces d'étanchéité des bagues d'étanchéité accouplées, une configuration étant constituée de rainures angulaires relativement profondes (34), et l'autre configuration étant constituée de rainures relativement peu profondes (44). Les rainures relativement profondes (34) sont optimisées pour permettre un fonctionnement hydrodynamique et, lors de la rotation de l'arbre, pompent le fluide entre les faces d'étanchéité pour régler le jeu fonctionnel. Les rainures relativement peu profondes (44) sont conçues pour empêcher par voie hydrostatique un blocage par friction des faces d'étanchéité lorsque l'arbre est totalement ou pratiquement immobilisé.

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