| 摘要 |
PROBLEM TO BE SOLVED: To provide a centrifugal impeller capable of improving strength around a bore and suppressing resonance of a disc part. SOLUTION: This compressor impeller 10 is provided with the disc part 22 having a guide face 21 for guiding combustion gas flowing in from the axial direction into the radial direction and a plurality of blades 23 erected radially on the guide face 21 of the disc part 22. A boss part 24 is protrudedly provided on a rear face of the disc part 22, and the bore 25 which has comparatively large diameter and in which a rotor shaft 14 is internally fitted is provided on a shaft axis of the boss part 24. The boss part 24 has a stepped shape composed of a large diameter part 26 on a terminal side and a small diameter part 27 on a tip side. Many ribs 28 are radially and protrudedly provided on an outer peripheral side of the rear face of the disc part 22. COPYRIGHT: (C)2006,JPO&NCIPI
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