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US 10,240,467 B2Granted
Anti-rotation lug for a gas turbine engine stator assembly
AssigneeUnited Technologies Corporation
InventorsNeil L. Tatman, Richard K. Hayford
Life of this patent
Estimating the term…
Abstract
A stator assembly includes a case including an arcuate wall having an aperture with circumferentially spaced first lateral surfaces. A stator vane has an outer platform with a notch. An anti-rotation lug has a base that is received in the notch and a boss extends from the base. The boss is received in the aperture. The boss has second lateral surfaces that engage the first lateral surfaces in an interference fit relationship.
Claims11
A stator assembly comprising:
- a case including an arcuate wall having an aperture with circumferentially spaced first lateral surfaces;
- a stator vane having an outer platform with a notch;
- an anti-rotation lug having a base received in the notch and a boss extending from the base, the boss received in the aperture, the boss having second lateral surfaces engaging the first lateral surfaces in an interference fit relationship;
- and
- wherein the first lateral surfaces are joined by first arcuate surfaces opposite one another and providing an aperture length, and the second lateral surfaces are provided by second arcuate surfaces opposite one another and providing a boss length, the second arcuate surfaces are convex and extend outward toward their respective first arcuate surface, the aperture length greater than the boss length providing a clearance between the first arcuate surfaces and the second arcuate surfaces.
2 more elements
A method of assembling a stator assembly comprising the steps of:
- providing a compressor case with an aperture, wherein the aperture includes first lateral surfaces that are parallel to one another providing an aperture width, first lateral surfaces are joined by first arcuate surfaces opposite one another providing an aperture length;
- providing an anti-rotation lug with a boss, the boss includes second lateral surfaces parallel with one another and providing a boss width, the boss width greater than the aperture width, the second lateral surfaces joined by second arcuate surfaces opposite one another and providing a boss length, the second arcuate surfaces are convex and extend outward toward their respective first arcuate surface, the aperture length greater than the boss length;
- and
- press-fitting the boss into the aperture while providing a clearance between the first arcuate surfaces and the second arcuate surfaces.
1 more element
Dependencies are inferred from the claim text.