摘要 |
An air cycle machine (10) a plurality of wheels mounted on a common shaft (20) for rotation therewith about a longitudinal axis (12), including a compressor rotor (60) and a turbine rotor (50) mounted to a central portion (20c) of the shaft in back to back relationship, the turbine rotor (50) being operative to extract energy from a flow of compressed air for driving the shaft (20), and the compressor rotor (60), in rotation about the axis. The compressor rotor (60) and the compressor outlet flow passing through duct (164) are thermally isolated from the turbine rotor (50) and the turbine inlet flow passing through duct (152), respectively, by an annular disc-like member (14) of a low thermal conductivity, fiber reinforced resin composite disposed about the shaft 20 and extending radially outwardly between the turbine rotor (50) and the compressor rotor (60).
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