Patent ID: 7326030
Filing Date: 2008-02-05
Classification: F01D,F05D

Abstract:
1. A turbine airfoil, comprising: a generally elongated airfoil formed from an outer wall having a leading edge, a trailing edge, a pressure side, and a suction side; a first platform at a first end of the generally elongated airfoil; an outer shroud coupled to the first platform; an attachment ring positioned proximate to a perimeter of the first platform adapted to engage the outer shroud, wherein the attachment ring defines a first cavity positioned at an interface between an outer surface of the first platform and the outer shroud; a second platform at a second end of the generally elongated airfoil generally opposite to the first platform; an inner shroud coupled to the second platform; an attachment ring positioned proximate to a perimeter of the second platform adapted to engage the inner shroud, wherein the attachment ring defines a second cavity positioned at an interface between an outer surface of the second platform and the inner shroud; and at least one connection device for coupling the outer shroud to the first end of the elongated airfoil and for coupling the inner shroud to the second end of the elongated airfoil with the respective attachment rings being in line with respective perimeter ends of the elongated airfoil such that the inner and outer shrouds transmit compression forces that are concentrated at a perimeter of the elongated airfoil.