| 摘要 |
PROBLEM TO BE SOLVED: To lighten weight of an impeller of a centrifugal compressor while maintaining necessary strength. SOLUTION: A recessed part dented toward inlet side as compared to an attachment position corresponding to a position where a plurality of impeller blades are attached in a circumference direction is formed at a non-attachment position corresponding to a position where the plurality of impeller blades are not attached in the circumference direction on a back surface positioned at an opposite side to the inlet side through which gas of an impeller disk is introduced. Since stress during rotation is low at the non-attachment position where no impeller blade exists, weight reduction can be done by greatly removing material while maintaining necessary strength. COPYRIGHT: (C)2011,JPO&INPIT
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