Aerofoil blade damping

Fluid reaction surfaces (i.e. – impellers) – Rotor having flow confining or deflecting web – shroud or... – Axially extending shroud ring or casing

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416190, 416500, F01D 522

Patent

active

049175742

ABSTRACT:
An aerofoil balde rotor assembly in which a plurality of aerofoil blades having circumferentially extending platforms are located on the periphery of a rotatable disc. Each of the platforms is provided with tracks on its radially inner surface. The tracks of adjacent platforms define a convergent seating for a ceramic spherical damping member. Each spherical damping member frictionally engages the tracks of adjacent platforms simultaneously upon rotation of the assembly so as to provide aerofoil damping.

REFERENCES:
patent: 2310412 (1943-02-01), Flanders
patent: 2349187 (1944-05-01), Meyer
patent: 2862686 (1958-12-01), Bartlett
patent: 2912223 (1959-11-01), Hull
patent: 3396905 (1968-08-01), Johnson
patent: 3752599 (1973-08-01), Pace
patent: 4455122 (1984-06-01), Schwarzmann
patent: 4505642 (1985-03-01), Hill

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