Compressor

F - Mech Eng,Light,Heat,Weapons – 04 – D

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Details

F04D 7/02 (2006.01) F04D 25/06 (2006.01) F04D 29/02 (2006.01) F04D 29/04 (2006.01) F25B 1/053 (2006.01) F25B 1/10 (2006.01) F25B 31/02 (2006.01) F25B 49/02 (2006.01)

Patent

CA 2165337

A centrifugal type refrigerant compressor comprises at least one impeller, electric motor and drive shaft mounted on non-lubricated radial bearings, such as magnetic or foil gas bearings, with axial locating means associated with the shaft to restrict axial movement thereof with respect to the compressor housing. The housing encases the motor and the compressor and defines the gas inlet and the gas outlet passageways. Gas throttling means is provided in the inlet, and a control means varies the speed of the motor and the throttling means to control the compression ratio and mass flow through the compressor in accordance with the refrigeration load.

Un compresseur frigorifique de type centrifuge comprend au moins une roue hélice (17, 18), un moteur électrique (27) ainsi qu'un axe d'entraînement (22) monté sur des paliers radiaux non lubrifiés, tel que des paliers magnétiques ou à couches de gaz (23, 24), ainsi qu'un moyen de positionnement axial (26) associé à l'axe (22), destiné à limiter son mouvement axial par rapport au logement (12) du compresseur. Le logement (12) contient le moteur (27) ainsi que le compresseur, et il définit les passages d'entrée (31) et de sortie (16) du gaz. Un moyen d'étranglement (34) de gaz est monté dans l'entrée (31), et un moyen de commande (30) fait varier le régime du moteur (27) ainsi que le moyen d'étranglement (34), afin de régler le taux de compression ainsi que le flux massique dans le compresseur selon la charge de réfrigération.

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