Patent ID: 9097129
Filing Date: 2015-08-04
Classification: F01D,F04D,Y10T

Abstract:
1. A method of forming a segmented knife edge seal with ship lap ends, the method comprising: obtaining a plurality of oversized arcuate seal segments, each segment with a first end, a second end, a retention tang to hold the seal in place with respect to another part, and a main load bearing surface to connect the retention tang to the knife edge seal, the first and second ends spaced apart in a circumferential direction; machining the first end of each segment to form a first mating surface for a ship lap seal, wherein machining is performed on the first end so that the ship lap seal extends through the knife edge seal, and wherein the first end has a convex portion and a concave portion; machining the second end of each segment to form a second mating surface for another ship lap seal, wherein machining is performed on the second end so that the other ship lap seal extends through the knife edge seal, wherein the first mating surface is complementary and overlapping to the second mating surface when a first end of a seal segment is interfaced with a second end of another adjacent seal segment, and wherein the second end has a convex portion and a concave portion, the respective concave and convex portions of the first and second ends defining the complementary ship lap mating surfaces; and fitting the segments together to form a full circumferential segmented seal, wherein the segments are fit together with the first mating surface of one segment connecting to the second mating surface of an adjacent segment.