Apparatus and method for refinishing turbine blade airseals

Details Apparatus and method for refinishing turbine blade airseals Apparatus and method for refinishing turbine blade airseals

B - Operations, Transporting

23

P

26/150

B23P 15/04 (2006.01) B23P 6/00 (2006.01) F01D 5/00 (2006.01)

Patent

CA 1130546

APPARATUS AND METHOD FOR REFINISHING TURBINE BLADE AIRSEALS ABSTRACT OF THE DISCLOSURE A method and apparatus for restoring airseals on gas turbine blades and vanes. A worn or damaged airseal is re- moved by abrasive belt grinding perpendicular to its length to create a stub. Then a piece of material is joined to the stub, as by welding. Next the airseal weldment is con- toured using abrasive belting, perpendicular to the weldment length. The invention is particularly advantageous for the re- pair of components having two airseals of different dimensions. A single two-position fixture is usable to remove old airseals and to refinish airseal weldments. Refinishing is accomplished with a countoured belt; the contour is chosen to be interme- diate, but within the tolerance of, the contours of the first and second airseals. As a result, airseals are economically restored in short runs. - 1 - EH-6818

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