ROTATING MACHINE

摘要

A steam turbine through which a fluid flows along an axis is equipped with: a tip shroud for turbine blades that are provided on a shaft that extends with the axis as a center; an outer partition plate ring that is provided on a casing so as to face the tip shroud in a radial direction and be capable of rotating relative to the tip shroud around the axis; seal fins that extend radially inward from the outer partition plate ring and that, with the tip shroud, form minute gaps therebetween; and steam introduction surfaces that are formed on downstream sides of the seal fins and are provided so as to face the seal fins within cavities where a main vortex, generated from a leakage flow passing through a minute gap, is generated, and that guide the flow, generated from the main vortex, toward the minute gaps.

主权项

1. A rotating machine through which a fluid flows along an axis, the rotating machine comprising:
a rotor that extends with the axis as a center; a stator that is provided so as to face a radial direction of the rotor and be capable of rotating relative to the rotor around the axis; a seal fin that extends from one of the rotor and the stator to the other and forms a gap between the seal fin and the other; and a fluid introduction surface that is formed on a downstream side of the seal fin and is provided so as to face the seal fin within a cavity where a vortex, generated from a leakage flow passing through the gap, is generated, and that guides the flow, generated from the vortex, toward the gap.