Patent ID: 8336328
Filing Date: 2012-12-25
Classification: F16C,F25B

Abstract:
1. An air cycle refrigerating/cooling system composing a turbine unit which includes a compressor for compressing air and an expansion turbine for adiabatically expanding the air, wherein a compressor rotor of the compressor and a turbine rotor of the expansion turbine are attached to both ends of the same main shaft in the turbine unit in such a manner that the main shaft is rotatably supported by a bearing, and part or the entirety of a thrust force applied to the main shaft is supported by an electromagnet, the bearing being installed between the compressor rotor and the turbine rotor in the spindle housing that houses the main shaft, the system further comprising a non-contact seal at least either between the compressor rotor and the bearing in close proximity thereof, which is between the outer periphery of the main shaft and the spindle housing, or between the turbine rotor and the bearing in close proximity thereof, which is between the outer periphery of the main shaft and the spindle housing, the bearing being a rolling contact bearing for supporting the main shaft in a radial direction, the spindle housing including therewithin a bearing cooling air guiding path for making air in the inlet portion of the expansion turbine flow to a portion in the vicinity of the bearing on the compressor side, and the main shaft including therewithin a flow out path for making the air flown to the portion in the vicinity of the bearing on the compressor side to the inlet side of the compressor.