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:
Aug. 24, 1993
Filed:
Jul. 06, 1992
Jurek Ferleger, Longwood, FL (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
A method and apparatus are provided for determining the amount and type of permanent deformation experienced by a turbomachine blade. According to the invention, small holes are drilled in at least three blades of the blade row. One hole is drilled in the inlet face of the blade shroud and another hole is drilled in the inlet face of the blade root. In addition, third and fourth holes are drilled in the exit face of the shroud and a sixth hole is drilled in the exit face of the root. Measurements are taken between the shroud holes on the middle blade and the root holes on the outer blades in the row on both the inlet and exit faces. The measurements are use to form triangles indicating the blade geometry. By comparing the changes in these triangles after substantial operating time, both the type and amount of permanent deformation can be determined.