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Device for detecting defect of turbine rotor blade and method for detecting defect of turbine rotor blade
US9103801B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9103801-B2 |
| Application number | US-200813124092-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 14, 2008 |
| Priority date | Oct 14, 2008 |
| Publication date | Aug 11, 2015 |
| Grant date | Aug 11, 2015 |
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Abstract
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In a defect detection device for a turbine rotor blade, a recess is provided in a side surface of a web provided to the inner circumferential side of a stationary blade diaphragm where stationary blades are annularly arranged adjacent to turbine rotor blades. An eddy current probe is movably installed in the recess, and a rod provided with a signal line for transmitting a signal detected by the eddy current probe, connected to the eddy current prove, is set up to be movable through a hole in a turbine casing and an air gap formed in the stationary blade diaphragm. The eddy current probe is moved toward or away from the turbine rotor blade implanting portion, and a data analyzer determines the condition of a defect occurred in the turbine rotor blade implanting portion based on the signals detected by the eddy current probe.
First claim
Opening claim text (preview).
The invention claimed is: 1. A defect detection device for a turbine rotor blade having a turbine rotor blade implanting portion constructed by fitting a set of rotor grooves formed on a rotor disc portion of a turbine rotor and a set of blade grooves formed on a root portion of the turbine rotor blade, wherein the turbine rotor is rotatably installed inside a turbine casing, and around an outer circumference of the turbine rotor, a plurality of turbine rotor blades are annularly a…
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Classifications
- G01N27/9006Primary
Physics · mapped topic
Physics · mapped topic
- G01N27/90Primary
Physics · mapped topic
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Frequently asked questions
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- What does patent US9103801B2 cover?
- In a defect detection device for a turbine rotor blade, a recess is provided in a side surface of a web provided to the inner circumferential side of a stationary blade diaphragm where stationary blades are annularly arranged adjacent to turbine rotor blades. An eddy current probe is movably installed in the recess, and a rod provided with a signal line for transmitting a signal detected by the…
- Who is the assignee on this patent?
- Hirano Atsuya, Nishimizu Akira, Kudo Takeshi, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification G01N27/9006. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Aug 11 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).