Vibration damper assembly for the buckets of a turbine

Details Vibration damper assembly for the buckets of a turbine Vibration damper assembly for the buckets of a turbine

2005-02-08

2005-02-08

Nguyen, Hoang (Department: 3748)

Fluid reaction surfaces (i.e., impellers)

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

Axially extending shroud ring or casing

C416S21900R, C416S500000

Reexamination Certificate

active

06851932

ABSTRACT:
A damper pin is disposed between adjacent buckets of a turbine rotor. A first bucket has circumferentially extending supports defining a pair of axially spaced surfaces on which a damper pin rests in a cold condition of the turbine. The adjacent bucket is undercut adjacent its platform to provide an angled surface overlying a generally correspondingly angled surface of the damper pin. The damper pin fits slightly loose within the recess and, upon turbine rotation at speed, the angled surfaces of the damper pin and recess cooperate to bias the damper pin against the first bucket whereby the damper pin engages both buckets and dissipates vibratory action.

REFERENCES:
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patent: 5478207 (1995-12-01), Stec
patent: 5827047 (1998-10-01), Gonsor et al.
patent: 6354803 (2002-03-01), Grover et al.
patent: 6390775 (2002-05-01), Paz
patent: 6450769 (2002-09-01), Szwedowicz
patent: 6478544 (2002-11-01), Brandl et al.
patent: 6776583 (2004-08-01), Wang et al.

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