STEAM TURBINE EXHAUST CHAMBER, AND STEAM TURBINE

摘要

This steam turbine exhaust chamber, for guiding steam that has passed through a final stage moving blade of a steam turbine to the outside of the steam turbine, is provided with a casing, a bearing cone, and a flow guide, wherein: an inner surface of the casing includes an inner circumferential surface which extends in the axial direction of a rotor, on the outer circumferential side of the flow guide, and a sidewall surface connecting the inner circumferential surface and the bearing cone; a first projecting portion which projects toward the outside in the radial direction is formed in the circumferential direction on the sidewall surface above a horizontal plane including the axis of rotation of the rotor; and the first projecting portion is positioned outward, in the radial direction of the rotor, of a downstream end of the inner circumferential surface of the flow guide, over at least a partial range in the circumferential direction.