Abstract:
A turbine engine has a circumferentially segmented shroud 62 within a case structure 70. Each shroud segment (66) is mounted for movement between an inboard position and an outboard position. One or more springs 130 bias the shroud segments (66) toward their inboard positions. One or more valves 144 are positioned to vent one or more volumes 150 so as to counter the spring bias to shift the shroud segments (66) to their outboard positions.
Abstract:
A rotor blade (14) for a turbine engine rotor assembly (10) is provided with apparatus for damping vibrations in the blade. The blade includes a pocket (26) formed in a surface. The apparatus for damping vibrations in the blade includes a damper (34) and a pocket lid (36). The damper (34) is received within the pocket (26) between an inner surface (32) of the pocket (26) and the pocket lid (36). The pocket lid is attached to the airfoil and contoured to match the curvature of the airfoil. The damper may be of a sinusoidal shape, or may comprise a plurality of strands (39) formed in a mesh (38).
Abstract:
A turbine engine has a circumferentially segmented shroud within a case structure. Each shroud segment is mounted for movement between an inboard position and an outboard position. One or more springs bias the shroud segments toward their inboard positions. One or more valves are positioned to vent one or more volumes so as to counter the spring bias to shift the shroud segments to their outboard positions.
Abstract:
Un moteur à turbine (20) comprend un flasque (62, 64) segmenté dans le sens circonférentiel dans une structure de carter. Chaque segment de flasque (66, 68) est monté pour un mouvement entre une position intérieure et une position extérieure. Un ou plusieurs ressorts (130, 132, 134) sollicitent les segments de flasque (66, 68) vers leurs positions intérieures. Une ou plusieurs soupapes (144, 146) sont positionnées pour dégazer un ou plusieurs volumes de manière à contrer la sollicitation du ressort pour décaler les segments de flasque (66, 68) vers leurs positions extérieures.
Abstract:
A rotor blade (14) for a turbine engine rotor assembly (10) is provided with apparatus for damping vibrations in the blade. The blade includes a pocket (26) formed in a surface. The apparatus for damping vibrations in the blade includes a damper (34) and a pocket lid (36). The damper (34) is received within the pocket (26) between an inner surface (32) of the pocket (26) and the pocket lid (36). The pocket lid is attached to the airfoil and contoured to match the curvature of the airfoil. The damper may be of a sinusoidal shape, or may comprise a plurality of strands (39) formed in a mesh (38).
Abstract:
A rotor blade (14) for a turbine engine rotor assembly (10) is provided with apparatus for damping vibrations in the blade. The blade includes a pocket (26) formed in a surface. The apparatus for damping vibrations in the blade includes a damper (34) and a pocket lid (36). The damper (34) is received within the pocket (26) between an inner surface (32) of the pocket (26) and the pocket lid (36). The pocket lid is attached to the airfoil and contoured to match the curvature of the airfoil. The damper may be of a sinusoidal shape, or may comprise a plurality of strands (39) formed in a mesh (38).