Patent ID: 7156609
Filing Date: 2007-01-02
Classification: B23P,F03D,F05B,Y02E,Y02P,Y10S,Y10T

Abstract:
1. A method of constructing a composite turbine blade, the method comprising: identifying a turbine blade of continuous compound curvilinear design to be approximated by said composite turbine blade; for discrete base members each having a leading edge and a trailing edge with respect to fluid flow over said base members, each said base member having a first and a second end cut, respectively, at a first and a second angle with respect to said base member leading edge, and each said base member twisted to a third angle such that said leading and trailing edges are not parallel, determining the quantity of said base members, and, for each said base member, the base member length and the first, second, and third angles required to approximate said continuous compound curvilinear turbine blade when said base members are joined end-to-end; cutting a plurality of flat sheets so that each said sheet can be bent to conform to said determined length and said determined first, second, and third angles of a base member; bending said flat sheets into a plurality of bent members so that each has a leading edge, two substantially parallel straight trailing edges, and two open ends; twisting each said bent member to its said determined third angle; before or after said twisting step, joining said two trailing edges of each said bent member into a single trailing edge to form a plurality of prepared blade members; and joining a plurality of said prepared blade members end-to-end to create a composite turbine blade approximating said continuous compound curvilinear turbine blade, said composite turbine blade in cooperation with at least one other substantially matching composite turbine blade being capable of unidirectionally rotating a turbine about a first axis of rotation under the influence of reversible fluid flow.