MULTISTAGE CENTRIFUGAL COMPRESSOR, AND METHOD FOR REMODELING MULTISTAGE CENTRIFUGAL COMPRESSOR

摘要

PROBLEM TO BE SOLVED: To provide a multistage centrifugal compressor and a method for remodeling the same, reducing a fluid loss of working fluid in a return flow passage and improving efficiency.;SOLUTION: This multistage centrifugal compressor 100 includes: a plurality of impellers 1 rotating around a rotating shaft 5 and axially provided; a curved flow passage 3 for turning the working fluid 11 delivered from the impellers 1; and the return flow passage 4 for allowing the working fluid 11 passed through the curved flow passage 3 to flow into the rear stage impeller 1. The return flow passage 4 is so formed that the axial flow passage width Ws_IN of the inlet 4a of the return flow passage 4 is equal to the axial flow passage width Ws_OUT of the inlet 4b thereof.;COPYRIGHT: (C)2010,JPO&INPIT