| 摘要 |
PROBLEM TO BE SOLVED: To provide a turbo wheel that ensures small disc mass and a high natural frequency. SOLUTION: A disc part of the turbo wheel consists of a disc 1 and a side plate 2 diffusion-bonded together, and the disc specially has a shape with an internal space whose opening side is closed by the side plate 2. The disc part is thus reduced in weight to increase the natural frequency.
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