COMPRESSOR IMPELLER, CENTRIFUGAL COMPRESSOR, AND SUPERCHARGER

摘要

PROBLEM TO BE SOLVED: To sufficiently enlarge the actuation area of a centrifugal compressor 29 onto a large flow rate side, and to promote improvement in compressor efficiency of the centrifugal compressor 29 in the actuation area of a small flow rate side.SOLUTION: A plurality of compressor blades 41 are integrally formed at an equal interval in a circumferential direction on a hub face 39h of a compressor disk 39; an inlet blade angle &thetas;m of a mid-span in each compressor blade 41 is set so as to be larger than an inlet blade angle &thetas;t of a tip end thereof; the inlet blade angle &thetas;m of the mid-span in each compressor blade 41 is set to 55-65 degrees; the inlet blade angle &thetas;t of the tip end in each compressor blade 41 is set to 50-60 degrees; and an inlet blade angle &thetas;h of a hub end in each compressor blade 41 is set to 30-40 degrees.