To provide a centrifugal fluid machine capable of effectively preventing inflow of swirl flow at the upstream of a seal by suppressing the swirl flow in the seal by a high-pressure fluid injected into the seal, in a centrifugal fluid machine.
A centrifugal fluid machine includes a centrifugal impeller for raising a pressure of a fluid, a rotating shaft for driving the centrifugal impeller, and an annular seal for preventing the fluid of which the pressure is raised by the centrifugal impeller, from passing through a clearance gap between a rotating body and a stationary portion. An injection outlet 11 for jetting a high-pressure fluid is disposed between seal fins adjacent to each other, at the upstream side of the leak flow passing through the annular seal, and a discharge blade for discharging a part of the high-pressure fluid injected from the jetting port from an upstream side annular seal end portion, is disposed on the rotating body while positioned on the annular seal end portion.
| JP6817119 | Emergency seal and sealing structure |
| JPS54162210 | SEAL METHOD AND APPARATUS FOR TURBO MACHINE |
MIURA HARUO
NARITA MITSUHIRO
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