초록 ▼

A blade-to-blade vibration damper for a turbine rotor blade is disclosed. Each blade has airfoil, platform and root portions. A plurality of blades are circumferentially spaced about a rotor disk. An inclined recess extends into the platform portion of each blade from a first surface thereof, and to

A blade-to-blade vibration damper for a turbine rotor blade is disclosed. Each blade has airfoil, platform and root portions. A plurality of blades are circumferentially spaced about a rotor disk. An inclined recess extends into the platform portion of each blade from a first surface thereof, and toward its root portion. A U-shaped wire-form damping member has its in-turned marginal end portions slidably received in each recess. When the rotor disk is rotated at a sufficient angular speed, the damping members move outwardly by the centrifugal force acting thereon to engage the opposing surface of the platform portion of the adjacent blade. When so engaged, the members damp vibrations of such blades and seal the space between the opposing platform surfaces.

대표청구항 ▼

An improved rotor blade adapted to be mounted on a rotor disk in circumferentially spaced relation to an adjacent blade, said improved blade comprising: an airfoil portion, a platform portion and a root portion, said platform portion having a first surface adapted to be arrange din spaced facing rel

An improved rotor blade adapted to be mounted on a rotor disk in circumferentially spaced relation to an adjacent blade, said improved blade comprising: an airfoil portion, a platform portion and a root portion, said platform portion having a first surface adapted to be arrange din spaced facing relation to an opposing surface of said adjacent rotor blade, said improved blade also having an arcuate surface extending between said root portion and said first surface, said arcuate surface being bowed outwardly in a transverse direction; two transversely spaced inclined recess slots extending into said platform portion from said first surface and toward said root portion; and a U-shaped member having a rod-like central portion and in-turned marginal end portions, said marginal end portions being arranged in said slots for sliding movement relative thereto so that said central portion may move toward and away from said bowed arcuate surface along the path defined by said slots, said U-shaped member being adapted to be moved relative to said platform portion to a position at which no portion thereof will extend outwardly beyond said first surface toward said opposing surface, said member being so configured and arranged that when said rotor is caused to rotate at a sufficient angular speed, the centrifugal force acting on said member will urge said member to move outwardly along said path so that said central portion will engage said adjacent blade opposing surface to damp vibrations of at least one of said blades.