Sealing arrangement in a compressor

F - Mech Eng,Light,Heat,Weapons – 01 – D

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F01D 11/02 (2006.01) F01D 11/04 (2006.01) F02C 7/28 (2006.01) F04D 29/08 (2006.01) F04D 29/16 (2006.01) F04D 29/58 (2006.01)

Patent

CA 2538749

A sealing arrangement for a compressor (10) that compresses a gaseous mixture of air and fuel includes a pressurized air supply duct (46) for supplying pressurized air into a leakage pathway defined between a compressor wheel (30) and a housing (12) of the compressor, which leakage pathway leads from the main gas flow path into a bearing area of the compressor, the pressurized air being supplied at a pressure sufficient to ensure that air and gaseous fuel cannot flow from the main gas flow path through the leakage pathway into the bearing area. A portion of the pressurized air flows into the bearing area, while the remainder of the air flows outwardly and is either fed back into the main gas flow path or is combined with air and gaseous fuel that leaks past an outer seal and is recirculated back to the compressor inlet.

Système d'étanchéification pour un compresseur (10) qui comprime un mélange gazeux d'air et de carburant et qui comprend un conduit d'alimentation en air comprimé (46) conçu pour introduire de l'air comprimé dans un passage de fuite défini entre une roue (30) du compresseur et un carter (12) de ce compresseur. Ce passage de fuite s'étend de la voie d'écoulement principale du gaz jusqu'à une zone de palier du compresseur, l'air comprimé étant fourni à une pression suffisante pour que l'air et le carburant gazeux ne puissent pas s'écouler de cette voie d'écoulement de gaz principale vers la zone de palier en passant par le passage de fuite. Une partie de cet air comprimé pénètre dans la zone de palier, tandis que la partie restante s'écoule vers l'extérieur et est, soit renvoyée dans la voie de gaz principale, soit combinée à l'air et au carburant gazeux fuyant au-delà d'un joint extérieur et remise en circulation vers l'entrée du compresseur.

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