The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 23, 2012
Filed:
Sep. 26, 2008
Charles Matz, Neuenhof, CH;
Bernhard Erb, Unterkulm, CH;
Bikas Das Burma, Wettingen, CH;
Luca Beresini, Sammjun-Compslsch, CH;
Martin Heinrich Treiber, Zurich, CH;
Peter Marx, Birmenstorf, CH;
Charles Matz, Neuenhof, CH;
Bernhard Erb, Unterkulm, CH;
Bikas Das Burma, Wettingen, CH;
Luca Beresini, Sammjun-Compslsch, CH;
Martin Heinrich Treiber, Zurich, CH;
Peter Marx, Birmenstorf, CH;
ALSTOM Technology Ltd., Baden, CH;
Abstract
In a method of operating a gas turbine during shut down, the gas turbine is decelerated and closure of compressor inlet guide vanes () is initiated at a shaft speed at least 5% above the shaft speed where a vibration peak occurs. The compressor inlet guide vanes () are closed by an angle in the range from 15°-35°, preferably at a rate between 5° and 10° per second. The method effects a reduction of the risk of rotational stall.