Mitsubishi Heavy Industries Limited

Mitsubishi Power, Ltd.

Shouhei Danno

Hideaki Sato

Yuichiro Waki

Yuki Yamamoto

Kimihiro Todo

Tatsuo Nakamoto

Tomohiro Horai

Kenichi Sakashita

A stator blade segment includes a circumferentially extending outer blade ring, a stator blade extending radially inward from the outer blade ring, and a sealing member. The stator blade has a cavity that is formed in the interior of the blade and that communicates with the surface of the blade. The outer blade ring has a blade ring body and two blade ring protrusions. The two blade ring protrusions protrude radially outward from an anti-gas path surface of the blade ring body and face each other across a gap in an axial direction, and together with a casing, a drain recovery space is formed between the two blade ring protrusions. The blade ring body has a blade surface drain recovery passage that allows communication between the cavity and the drain recovery space. One of the two blade ring protrusions has a sealing surface.

Stator vane segment and steam turbine provided with same

A vane segment includes a blade ring, a plurality of vanes, and a caulking member. The blade ring includes a blade ring groove and a storage space forming portion. The blade ring groove includes a convex portion projecting from a second groove side surface of the blade ring groove to the first side. The storage space forming portion, in combination with an outer shroud, forms a storage space into which the caulking member enters. The caulking member is accommodated within the storage space, contacts with the blade ring groove and the outer shroud, and is exposed from an inner opening of the storage space.

Vane segment and steam turbine comprising same

A set screw () is provided, which has a screw main body (), a male thread portion () which is formed on an outer periphery of the screw main body (), and a drain hole () which penetrates a central portion of the screw main body () in an extension direction of the screw main body (). The blade root ring () has a hole () which extends radially outward from an inner peripheral surface () of the blade root ring (), and a female thread portion () which is formed on an inner peripheral surface () of the hole (), and the set screw () is screwed into the female thread portion ().

Stator blade segment and steam turbine

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Yokohama, Japan

Shouhei Danno