Patent ID: 6334755
Filing Date: 2002-01-01
Classification: F01D,F02C,Y02T

Abstract:
A turbomachine including a rotary compressor having an upstream end, a downstream end and means defining a flow path therebetween through which a stream of gas is compressed as it passes from said upstream end to said downstream end, said compressor including vanes disposed in said flow path and a compressor rotor having an outer wall which is contacted by said stream of gas as it flows along said flow path, and a pressurized gas supply device comprising a gas bleed orifice disposed in said rotary compressor and opening into said flow path thereof, and a cooling cavity disposed within said compressor rotor for cooling the pressurized gas bled from said gas stream via said gas bleed orifice, said cooling cavity comprising an inlet connected to said gas bleed orifice, an outlet, and a cooling surface for contact by said pressurized gas bled from said gas stream as said pressurized gas passes from said inlet to said outlet, said cooling surface being formed at least partly by at least a portion of the outer wall of said compressor rotor upstream of said gas bleed orifice whereby said bled pressurized gas is cooled by heat transfer through said outer wall of said compressor rotor to said gas stream upstream of said gas bleed orifice wherein said cooling surface extends overall from downsteam to upstream, so as to bring said bled pressurized gas against increasingly cooler zones of said cooling surface.