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US 11,015,449 B2Granted
Steam turbine blade and steam turbine
AssigneeMitsubishi Heavy Industries Compressor Corporation
InventorsTakuro Koda, Yuichi Sasaki
Life of this patent
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Abstract
The present invention provides a steam turbine blade and a steam turbine capable of further improving efficiency. A steam turbine blade includes a proximal end portion T11 which is formed in a blade shape having an intermediate reaction degree, an intermediate portion T12 which is formed in a blade shape having a low reaction degree; and a distal end portion T13 which is formed in a blade shape having a high reaction degree.
Claims4
A steam turbine comprising:
- a steam turbine blade, provided as a final stage rotor blade, comprising:
- a proximal end portion formed in a blade shape having an intermediate reaction degree;
- an intermediate portion formed in a blade shape having a low reaction degree;
- and
- a distal end portion formed in a blade shape having a high reaction degree;
- a final stage stator vane which is disposed to be arranged on an upstream side with respect to the steam turbine blade and constitutes a final stage along with the steam turbine blade;
- an intermediate stage rotor blade which is disposed to be arranged on an upstream side with respect to the final stage stator vane;
- an intermediate stage stator vane which is disposed to be arranged on an upstream side with respect to the intermediate stage rotor blade, and constitutes an intermediate stage, which is provided to be arranged on an upstream side with respect to the final stage in an axial direction, along with the intermediate stage rotor blade,
- wherein the steam turbine blade has a blade shape of which a pitch/chord ratio is smaller than that of the intermediate stage rotor blade in all of the proximal end portion, the intermediate portion, and the distal end portion.
6 more elements
Dependencies are inferred from the claim text.