Turbine blade with tuned damping structure

摘要

A turbine blade is provided comprising: a root; an airfoil comprising an external wall extending radially from the root and having a radially outermost portion; and a damping structure. The external wall may comprise first and second side walls joined together to define an inner cavity of the airfoil. The damping structure may be positioned within the airfoil inner cavity and coupled to the airfoil so as to define a tuned mass damper.

主权项

1. A turbine blade comprising:
a root; an airfoil comprising an external wall extending radially from said root and having a radially outermost portion, said external wall comprising first and second side walls joined together at leading and trailing edges to define an inner cavity of said airfoil; and a damping structure positioned within said airfoil inner cavity and coupled to said airfoil so as to define a tuned mass damper, said damping structure including a width dimension extending between said first and second side walls and a length dimension greater than said width dimension extending in a direction between said leading and trailing edges, and said damping structure comprising:
a damping element having a first end and a second end, said first end being coupled to said airfoil and said second end being free to move within said airfoil inner cavity;a tip mass member formed of a high density material different from a material defining said damping element and attached to said second end of said damping element; andsaid tip mass member movable with said second end of said damping element in a direction toward and away from said side walls.