Turbine outlet diffuser
US-2015361985-A1 · Dec 17, 2015 · US
Exhaust system for steam turbine
US9033656B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9033656-B2 |
| Application number | US-201213343180-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 4, 2012 |
| Priority date | Jan 14, 2011 |
| Publication date | May 19, 2015 |
| Grant date | May 19, 2015 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
An exhaust system for a steam turbine provided with an improved annular flow guide in a high or intermediate turbine. The improved flow guide reduces flow turbulence in an exhaust hood and reduces pressure loss to thereby improve turbine plant efficiency. The shape (vertically symmetric) of a flow guide 5 A according to a conventional technology was modified into the shape (vertically asymmetric) of a flow guide 5 such that the length of a downstream flow guide portion 5 d is greater than that of a upstream flow guide portion 5 u . Numerical analyses were performed to find the optimum flow guide occupation ratio of the conventional technology and the corresponding total pressure loss coefficient. The obtained values were used as reference values. Further, the flow guide occupation ratio of the upstream flow guide portion 5 u was set at 0.4 and the flow guide occupation ratio of the downstream flow guide portion 5 d was set at 0.7; at values where the total pressure loss coefficient becomes lower than the reference value. The rectification effect of the flow guide can thus be enhanced.
First claim
Opening claim text (preview).
What is claimed is: 1. An exhaust system for a steam turbine that guides exhaust gas used to drive a high pressure turbine or an intermediate turbine to a downstream turbine via an exhaust duct, the system comprising: an exhaust hood inner casing enclosing a turbine rotor; an exhaust hood outer casing surrounding the exhaust hood inner casing to define an exhaust hood therebetween; and an annular flow guide installed downstream of last stage rotor blades which are fixed to the…
Assignees
Inventors
Classifications
- F01D25/30Primary
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Patent family
Related publications grouped by family.
External sources
Next steps
Free tools are coming soon. Tell us what you want to track and we'll notify you.
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US9033656B2 cover?
- An exhaust system for a steam turbine provided with an improved annular flow guide in a high or intermediate turbine. The improved flow guide reduces flow turbulence in an exhaust hood and reduces pressure loss to thereby improve turbine plant efficiency. The shape (vertically symmetric) of a flow guide 5 A according to a conventional technology was modified into the shape (vertically as…
- Who is the assignee on this patent?
- Mizumi Shunsuke, Ogata Koji, Kudo Takeshi, and 3 more
- What technology area does this patent fall under?
- Primary CPC classification F01D25/30. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue May 19 2015 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).