SCROLL EXPANSION MACHINE

摘要

PROBLEM TO BE SOLVED: To solve problems that improvement of loss at thrust slide part is very important in improvement of efficiency of an expansion machine since ratio of loss at the thrust slide part of a turning scroll is large when the scroll expansion machine is compared with a scroll compressor and that discharge of oil into refrigeration cycle need to be limited to as little as possible from a point of view for efficiency improvement. SOLUTION: The scroll expansion machine materializing high efficiency while surely lubricating the thrust slide surface 101 can be provided by providing at least more than one oil supply groove 90 of which one end open to a back pressure chamber 29b and of which another end opens to an expansion chamber 15 near expansion end formed by a lap outer wall side of the turning scroll 13 and a lap inner wall side of the fixed scroll 12 is provided on a thrust surface supporting thrust load on the fixed scroll 12. COPYRIGHT: (C)2007,JPO&INPIT