Patent ID: 6210106
Filing Date: 2001-04-03
Classification: F01D,F05D,Y02T

Abstract:
A sealing apparatus for sealing a gas turbine engine variable vane rotatably supported by an engine casing circumscribed about an engine centerline, said apparatus comprising:a trunnion of the variable vane rotatable about a trunnion axis;inner and outer casing bores circumscribed about said trunnion axis and disposed radially outward of the engine centerline through the casing;said trunnion rotatably disposed within said inner and outer casing bores;said inner bore being wider than said outer bore forming an annular shoulder with a planar radially inwardly facing shoulder surface;an annular recess in said trunnion, said recess having a planar radially inwardly facing recess surface substantially co-planar with said shoulder surface;a sealing ring radially slidably disposed about said trunnion below said outer recess surface; andsaid sealing ring having a radially outwardly facing sealing surface substantially co-extensive in a direction perpendicular to said trunnion axis and sealable with both said outer recess surface and said shoulder surface.