Screw compressor-expander cryogenic system with magnetic coupling

摘要

Cryogenic refrigeration system 10 employs a screw compressor 72 and a screw expander 70 wherein one rotor of the compressor and one rotor of the expander is mechanically driven, including a magnetic coupling 50, 52 between the compressor and expander rotors. The other compressor rotor and other expander rotor is driven only by the connected rotor.