Steam turbine
US-2018038230-A1 · Feb 8, 2018 · US
Steam turbine blade and steam turbine
US11015449B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11015449-B2 |
| Application number | US-201916702836-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 4, 2019 |
| Priority date | Dec 7, 2018 |
| Publication date | May 25, 2021 |
| Grant date | May 25, 2021 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
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 T 11 which is formed in a blade shape having an intermediate reaction degree, an intermediate portion T 12 which is formed in a blade shape having a low reaction degree; and a distal end portion T 13 which is formed in a blade shape having a high reaction degree.
First claim
Opening claim text (preview).
What is claimed is: 1. 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. 2. The steam turbine according to claim 1 , wherein the steam turbine blade has a blade shape of which a turning angle 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. 3. The steam turbine according to claim 1 , wherein the final stage stator vane has a blade shape of which a pitch/chord ratio is smaller than that of the intermediate stage stator vane. 4. The steam turbine according to claim 2 , wherein the final stage stator vane has a blade shape of which a pitch/chord ratio is smaller than that of the intermediate stage stator vane.
Assignees
Inventors
Classifications
- F01D1/16Primary
characterised by having both reaction stages and impulse stages · CPC title
of the blades of successive rotor or stator blade-rows · CPC title
in steam turbines · CPC title
Fluid guiding means, e.g. vanes · CPC title
Nozzles; Nozzle boxes; Stator blades; Guide conduits {, e.g. individual nozzles (nozzle boxes F01D9/047)} · CPC title
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Frequently asked questions
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- What does patent US11015449B2 cover?
- 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 T 11 which is formed in a blade shape having an intermediate reaction degree, an intermediate portion T 12 which is formed in a blade shape having a low reaction degree; and a distal end portion T 13 which is formed in a blade…
- Who is the assignee on this patent?
- Mitsubishi Heavy Ind Compressor Corp
- What technology area does this patent fall under?
- Primary CPC classification F01D1/16. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue May 25 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).