Patent ID: 7942630
Filing Date: 2011-05-17
Classification: F01D,F02C,F04D,Y02T

Abstract:
1. A system for ventilating a downstream cavity of an impellor of a centrifugal compressor in a turbomachine, this cavity being delimited by a downstream face of the impellor and by an annular downstream end-piece of an annular diffuser arranged at the output of the compressor and being ventilated by taking air from the outlet of the centrifugal compressor, which comprises diversion means mounted fixedly in the downstream cavity of the impellor in order, on the one hand, to divert, along the annular end-piece of the diffuser, the air taken from the outlet of the compressor to its inlet in the downstream cavity of the impellor, and in order, on the other hand, to divert the ventilation air from the downstream portion of the downstream cavity and cause it to flow radially from the inside to the outside along the downstream face of the impellor.