Turbine air seal repair process
AssigneeTechniair, Inc.
InventorKarl S. Jakobsen
Life of this patent
Estimating the term…
Abstract
A repair process for repairing damaged turbine air seals comprises completely removing the damaged air seals and forming a mechanical seat in the seal base. A replacement ring of the desired seal alloy is positioned in the seat and bonded to the base by a brazing process. The replacement ring is then machined to form reconstructed knife edge seals.
Claims11
A repair process for repairing damaged turbine air seals which are formed from a seal assembly having at least one projecting seal member comprising:
- (a) completely removing at least one damaged seal member from said seal assembly to form a base;
- (b) machining said base to form a recess defining a mechanical seat;
- (c) providing a replacement member which is dimensioned to be closely received in said seat;
- (d) positioning said replacement member in said seat;
- (e) bonding said replacement member to said seal base by a brazing process;
- and
- (f) machining said replacement member to form a reconstructed seal member.
A repair process for repairing damaged turbine air seals which are formed from an annular seal assembly having at least one radially projecting knife edge seal comprising:
- (a) completely removing at least one damaged knife edge seal from said assembly to form a base;
- (b) machining said base to form a recess defining a mechanical seat having a generally uniform width W and a depth d;
- (c) providing a replacement structure of the same material as the at least one removed knife edge seal and having a width which is approximately equal to width W and a thickness which is at least equal to the sum of depth d and the desired maximum radial projection of a knife edge seal from the base;
- (d) forcing the replacement structure into said seat so as to form a replacement ring;
- (e) bonding said replacement ring to said seal base by means of a high temperature brazing process;
- and
- (f) machining said replacement ring to form at least one reconstructed knife edge seal.
Dependencies are inferred from the claim text.