Yressure balanced turbocharger rotating seal

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

Patent

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Details

F16J 15/40 (2006.01) F04D 25/04 (2006.01) F04D 29/12 (2006.01) F16J 15/44 (2006.01)

Patent

CA 2272368

A pressure balanced turbocharger rotating seal is provided by two piston rings (66, 68) mounted on the shaft (22) of the turbocharger, one of the rings (66, 68) engaging a circumferential surface of the shaft bore in the center housing and the second ring (68) engaging a circumferential surface of the shaft bore (30) in the turbine wheel (25) shroud, with a passage (74) for introducing pressurizing gas intermediate the two rings (66, 68), the passage (74) including a circumferential channel (78) in the inner face of the turbine wheel shroud, and a compression seal (82) engaged between the center housing and turbine wheel shroud outboard of the channel.

L'invention concerne un joint d'étanchéité rotatif pour un turbocompresseur, à équilibrage des pressions, constitué par deux segments de piston (66, 68) montés sur l'arbre (22) du turbocompresseur, un des segments (66, 68) venant en contact avec une surface circonférentielle de l'arbre dans le logement central et le second segment (68) venant en contact avec la surface circonférentielle de l'alésage de l'arbre (30) dans l'enveloppe de la roue (25) de la turbine, avec un passage (74) pour introduire du gaz sous pression entre les deux segments (66, 68), le passage (74) comprenant un canal circonférentiel (78) dans la face interne de l'enveloppe de la roue de la turbine, et par un joint de compression (82) engagé entre le logement central et l'enveloppe de la roue de la turbine, à l'extérieur par rapport au canal.

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