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:
Jun. 19, 2007
Filed:
Jul. 16, 2004
Andreas Boegli, Vogelsang-Turgi, CH;
James George Ritchie, Ennetbaden, CH;
Slawomir Slowik, Stetten, CH;
Heinrich Stuessi, Unterengstringen, CH;
Andreas Boegli, Vogelsang-Turgi, CH;
James George Ritchie, Ennetbaden, CH;
Slawomir Slowik, Stetten, CH;
Heinrich Stuessi, Unterengstringen, CH;
ALSTOM Technology Ltd., Baden, CH;
Abstract
A method of reconditioning a rotating blade () with a shroud () following the operation in a gas turbine, includes the application of a barrier () placed on the edge of the shroud () facing the edge of a shroud () of an adjacent blade having creep deformation. The barrier () prevents hot gas ingestion into a shroud cavity (). It is pre-fabricated or built-up layer-by-layer by welding or laser cladding or other methods. Additionally, the mass of the shroud () is reduced in order to re-establish the initial mass of the shroud. A thermal barrier coating () is additionally applied to the surfaces of the shroud () that are exposed to the hot gas of the turbine. The method significantly increases the lifetime of the blade ().