Vibration attenuation arrangement for rotor blades

Details Vibration attenuation arrangement for rotor blades Vibration attenuation arrangement for rotor blades

1998-05-15

2000-07-04

Nguyen, Ninh

Fluid reaction surfaces (i.e., impellers)

Lashing between working members or external bracing

Connecting adjacent work surfaces

416194, 416190, 416193A, 416220R, 416248, 416500, B63H 115

Patent

active

060829702

ABSTRACT:
An arrangement for attenuating vibrations of blades attached to a peripheral surface of a rotor of an axial turbine. A through hole is formed in each rotor blade in a generally thickness direction of the blade so that the through holes in combination define a single annular passage near a rotor surface when all of the rotor blades are attached to the rotor. A wire is provided to extend through the aligned through holes. Thus, the wire frictionally contacts the through holes when the blades are caused to vibrate due to a gas pressure and a centrifugal force generated upon operation of the axial turbine. Friction contact between the wire and the through holes attenuates vibrations of the blades.

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patent: 3104093 (1963-09-01), Craig et al.
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patent: 4662824 (1987-05-01), Ortolano
patent: 4699569 (1987-10-01), Gloor
patent: 5201850 (1993-04-01), Lenhardt et al.
patent: 5536145 (1996-07-01), Vandendriessche

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