FLUID MACHINE

摘要

PROBLEM TO BE SOLVED: To stably feed a lubricating oil to the sliding parts of a plurality of fluid machines contained in a hermetic container. SOLUTION: A compressor 20 and an expander 30 connected to each other through a drive shaft are disposed in the hermetic container 10. A lubricating oil feed route 29 for the compressor for feeding the lubricating oil lubricating the sliding parts of the compressor 20 is formed in the compressor drive shaft 27 of the compressor 20. A lubricating oil feed route 38 for the expander for feeding the lubricating oil lubricating the sliding parts of the expander 30 is formed in the expander drive shaft 37 of the expander 30 independently of the lubricating oil feed route 29 for the compressor. An oil feed pipe part 50 axially extending from the end face of the compressor drive shaft 27 and composing a part of the lubricating oil feed route 29 for the compressor extends through the inside of the lubricating oil feed route 38 for the expander so that the expander drive shaft 27 can be structured in a double tube. COPYRIGHT: (C)2007,JPO&INPIT