Mitsubishi Hitachi Power Systems, Ltd.

Shunji Imai

Soichiro Tabata

Naoto Tochitani

Takayuki Kurimura

Naotoshi Okaya

Yuki Enomoto

Yuta Okimori

Haruhiko Asaka

A steam turbine rotor blade for forming a turbine rotor cascade of a steam turbine includes a rotor blade main body having a blade portion, a blade base portion and a first coupling portion, which has first facing surfaces, provided on opposite end sides of the blade portion, and a second coupling portion provided in an intermediate portion of the blade portion and having second facing surfaces. The steam turbine rotor blade also includes a coating layer which is made of a Co-based alloy having a single composition on a surface of at least one of the first and second facing surfaces with a diffusion layer having a thickness of 10 &#x3bc;m or less provided between the coating layer and the surface.

Steam turbine rotor blade, method for manufacturing steam turbine rotor blade, and steam turbine

A fluid seal structure of a heat engine including a steam turbine includes an inner case which houses a turbine rotor rotatably inside, an outer case which houses the inner case and forms a space through which a fluid can flow between the outer case and an exterior surface of the inner case, a protruding portion protruding into the space from one of the exterior surface of the inner case or an interior surface of the outer case, and a partitioning plate extending into the space from the other one of the exterior surface or the interior surface and being formed annularly in a circumferential direction of the surface. The partitioning plate partitions the space into first and second space sections, and is flexurally deformable in the axial direction of the turbine rotor by an internal fluid pressure difference between the first and second space sections.

Fluid seal structure of heat engine including steam turbine

Growing community of inventors

Kanagawa, Japan

Shunji Imai