초록 ▼

A multiple piece turbine airfoil having an outer shell with an airfoil tip that is attached to a root with an internal structural spar is disclosed. The root may be formed from first and second sections that include an internal cavity configured to receive and secure the one or more components formi

A multiple piece turbine airfoil having an outer shell with an airfoil tip that is attached to a root with an internal structural spar is disclosed. The root may be formed from first and second sections that include an internal cavity configured to receive and secure the one or more components forming the generally elongated airfoil. The internal structural spar may be attached to an airfoil tip and place the generally elongated airfoil in compression. The configuration enables each component to be formed from different materials to reduce the cost of the materials and to optimize the choice of material for each component.

대표청구항 ▼

I claim: 1. A multiple piece turbine airfoil, comprising:at least one component forming a generally elongated airfoil with an outer wall having a leading edge, a pressure side, and a suction side, wherein the at least one component forming a generally elongated airfoil includes at least one spar rec

I claim: 1. A multiple piece turbine airfoil, comprising:at least one component forming a generally elongated airfoil with an outer wall having a leading edge, a pressure side, and a suction side, wherein the at least one component forming a generally elongated airfoil includes at least one spar receiving chamber;a trailing edge component sized to mate with a downstream end of the at least one component forming a generally elongated airfoil;an airfoil tip with a perimeter configuration that matches a perimeter formed by the at least one component forming a generally elongated airfoil and the trailing edge component and includes at least one spar receiving recess with an outer portion having a larger cross-sectional area than an inner portion;a root formed from separate first and second root sections that together form an airfoil receiving cavity for containing an inner end of the at least one component forming a generally elongated airfoil and an inner end of the trailing edge component; andat least one spar extending from the airfoil tip, through the at least one component forming a generally elongated airfoil, and into the airfoil receiving cavity of the first and second root sections to secure the at least one component forming a generally elongated airfoil, the trailing edge component and the airfoil tip to the root.