Dynamic response modification and stress reduction in dovetail a

Details Dynamic response modification and stress reduction in dovetail a Dynamic response modification and stress reduction in dovetail a

1983-04-14

1984-11-06

Yuen, Henry C.

Fluid reaction surfaces (i.e., impellers)

Specific working member mount

Blade received in well or slot

416219R, 416500, F01D 532

Patent

active

044809573

ABSTRACT:
A dovetail of a rotor blade is preferentially remove to thereby modify the support given to the root of a rotor blade. The modified support changes the vibrational characteristics of the rotor blade for reducing the tendency toward crack initiation. In one embodiment of the invention, one or more damping masses are fitted into the dovetail slot within the removed portion of the dovetail. The damping masses are loaded outward against the base of the rotor blade by centrifugal force and frictionally damp some of the vibrational energy of the rotor blade.

REFERENCES:
patent: 1229490 (1917-06-01), London
patent: 1699747 (1929-01-01), McKay
patent: 2686655 (1954-08-01), Schorner
patent: 2942843 (1960-06-01), Sampson
patent: 3292900 (1966-12-01), Pettersen
patent: 3385512 (1968-05-01), Bandukwalla
patent: 3689177 (1972-09-01), Klassen
patent: 3720480 (1973-03-01), Plowman et al.
patent: 3887298 (1975-06-01), Hess et al.

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