Fan blade damper

Details Fan blade damper Fan blade damper

1991-04-29

1993-04-27

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Rotor having flow confining or deflecting web, shroud or...

Axially extending shroud ring or casing

416500, F01D 526

Patent

active

052057135

ABSTRACT:
A fan blade damper system includes a fan disk integrally connected to a disk post. A retainer is fastened to the disk post and is molded to retain a damper block. The top portion of the damper block is shaped to make frictional contact with the underside of the platform of a fan blade, the underside of the platform being the region of the fan blade which experiences the highest platform vibratory amplitude when the fan blade is rotated. The damper block is thus mounted in a statically determinant fashion. The rotation of the fan blade produces centrifugal forces which produce reactionary forces in the damper block and retainer such that a maximum damping force amplitude is reacted to the fan disk.

REFERENCES:
patent: 2935297 (1960-05-01), Stalker
patent: 2997274 (1961-08-01), Hanson
patent: 3181835 (1965-05-01), Davis
patent: 3666376 (1972-05-01), Damlis
patent: 4182598 (1980-01-01), Nelson
patent: 4480957 (1984-11-01), Patel et al.
patent: 4494909 (1985-01-01), Forestier
patent: 4516910 (1985-05-01), Bouiller et al.
patent: 4723889 (1988-02-01), Charreron et al.
patent: 4872812 (1989-10-01), Hendley et al.
patent: 4936749 (1990-06-01), Arrao et al.

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