Importance

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Abstract

A rotary machine includes a rotor, a casing, a seal portion, and a high pressure fluid supply portion. The rotor includes a rotary shaft that rotates around an axial line and an impeller that rotates with the rotary shaft to compress a fluid; the casing defines a casing flow path through which the fluid compressed by the impeller flows and covers the rotor from an outer peripheral side; the seal portion includes an opposing surface opposite the outer peripheral surface of the rotor in the gap and seals the fluid that flows through the gap in a direction of the axial line from a high pressure side toward a low pressure side; and the high-pressure fluid supply portion supplies the fluid on the high pressure side flowing through the casing flow path to the gap.

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First Claim