| 摘要 |
PROBLEM TO BE SOLVED: To provide a centrifugal compressor having increased transmission torque from a rotating shaft to an impeller. SOLUTION: In this centrifugal compressor 10 having the rotating shaft 12 and the impeller 14 connected to the rotating shaft 12, the impeller 14 has a center hole 14d for passing the rotating shaft and a key groove 14b formed in the inner peripheral surface of the center hole 14d in a part of the center hole 14d adjacent to the tip 30 of the impeller 14, the rotating shaft 12 has a key groove 12b formed in a part of the outer peripheral surface corresponding to the key groove 14b formed in the impeller 14. The centrifugal compressor 10 has a key 18 engaging with the key grooves 14b and 12b of the impeller 14 and the rotating shaft 12. |
