| 摘要 |
PROBLEM TO BE SOLVED: To easily form a channel for injecting a high-pressure fluid to a labyrinth seal and reduce the excitation of a rotary shaft in a centrifugal type fluid machine. SOLUTION: The centrifugal type fluid machine 50 is provided with a centrifugal impeller 2 raising the pressure of fluid, the rotary shaft 1 driving the centrifugal impeller 2, and the labyrinth seal including a plurality of lines of sealing fins 22a inhibiting a fluid of which the pressure is raised by the centrifugal impeller 2 from passing through a gap between a rotary part and a stationary part. An injection port 22c injecting the high-pressure fluid is provided between adjacent sealing fins 22c upstream of a leak flow passing through the labyrinth seal 22, and a partition wall 22d is provided near the rotation direction side of the injection hole 22c to prevent the high-pressure fluid injected from the injection hole 22c from flowing in the rotary direction. COPYRIGHT: (C)2008,JPO&INPIT
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