Rupture protection ring for an engine casing
AssigneeMTU Motoren- und Turbinen-Union Muenchen GmbH
InventorHorst Neubert
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Abstract
A rupture prevention ring consists of two coaxially arranged, spaced-apart stiff end rings wrapped in several layers of fiber cloth. Resin bonding is used around the end rings while in the intermediate area between the end rings, the fibers are not free of resin and hence not stiffened. Owing to the high energy absorption capability of the structure including the elastic yielding of the fibers without the resin, an excellent containment ability is obtained at a low weight. Fragments are effectively retained without jeopardizing the rotating blade and disk assembly of the damaged stage.
Claims15
A rupture protection ring for an engine casing, comprising a structure made at least partially of fiber compound materials, said structure including two flexurally stiff supporting end rings which are axially spaced apart to form ring edges, a plurality of fiber cloth layers jointly wrapped around said stiff supporting rings, a resin impregnation in said fiber cloth where it is wrapped around said stiff supporting end rings, said fiber cloth being free of resin in an area between said stiff supporting end rings (2a, 2b), said fiber cloth (4) having fiber orientations which include angles within the range of about 15.degree. to about 45.degree. between fibers extending in one direction in one layer and fibers slanted in another direction in a different layer relative to said one direction.
Dependencies are inferred from the claim text.