Cooled rotor blade with vibration damping device

• Main Author: GREGG, SHAWN J
• Format: Patent
• Language: English; French; German
• Published: 17.04.2013
• Subjects: BLASTING; ENGINE PLANTS IN GENERAL; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES; NON-POSITIVE DISPLACEMENT PUMPS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; STEAM ENGINES; WEAPONS

A rotor blade (14) for a rotor assembly (10) is provided that includes a root (18), an airfoil (20), and a damper (24). The airfoil (20) includes a base (28), a tip (30), a pressure side wall (36), a suction side wall (38), and at least one cavity (40) disposed therebetween, and a channel (42). The damper (24) is selectively received within the channel (42). The channel (42) is disposed within the cavity (40) between a first wall portion (36) and a second wall portion (38). At least one of the first wall portion and the second wall portion includes a plurality of raised features (66) extending outwardly from the wall into the channel (42). The features (66) are spaced apart from one another. The raised features (66) extend between the damper (24) and the wall portion from which they extend outwardly. A plurality of tortuous flow passages (68) are formed between the damper (24), the respective wall portion, and the raised features (66) extendng 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.