Cooled rotor blade with vibration damping device

Details Cooled rotor blade with vibration damping device Cooled rotor blade with vibration damping device

2006-04-25

2006-04-25

Look, Edward K. (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Articulated, resiliently mounted or self-shifting impeller...

Resilient bias or mount

C416S500000

Reexamination Certificate

active

07033140

ABSTRACT:
A rotor blade for a rotor assembly is provided that includes a root, an airfoil, and a damper. The airfoil includes a base, a tip, a pressure side wall, a suction side wall, and at least one cavity disposed therebetween, and a channel. The damper is selectively received within the channel. The channel is disposed within the cavity between a first wall portion and a second wall portion. At least one of the first wall portion and the second wall portion includes a plurality of raised features extending outwardly from the wall into the channel. The features are spaced apart from one another. The raised features extend between the damper and the wall portion from which they extend outwardly. A plurality of tortuous flow passages are formed between the damper, the respective wall portion, and the raised features extending therebetween. Substantially all of the tortuous passages include at least one portion that extends at least partially in a lengthwise direction and at least one portion that extends at least partially in a widthwise direction.

REFERENCES:
patent: 3966357 (1976-06-01), Corsmeier
patent: 5558497 (1996-09-01), Kraft et al.
patent: 5820343 (1998-10-01), Kraft et al.
patent: 6402470 (2002-06-01), Kvasnak et al.

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