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Multiple piece turbine rotor blade

United States Patent

July 19, 2016
View the Complete Patent at the US Patent & Trademark Office
A spar and shell turbine rotor blade with a spar and a tip cap formed as a single piece, the spar includes a bottom end with dovetail or fir tree slots that engage with slots on a top end of a root section, and a platform includes an opening on a top surface for insertion of the spar in which a shell made from an exotic high temperature resistant material is secured between the tip cap and the platform. The spar is tapered to form thinner walls at the tip end to further reduce the weight and therefore a pulling force due to blade rotation. The spar and tip cap piece is made from a NiAL material to further reduce the weight and the pulling force.
Kimmel; Keith D. (Jupiter, FL), Plank; William L. (Tequesta, FL)
J & S DESIGN LLC (Jupiter, FL)
12/ 706,241
February 16, 2010
GOVERNMENT LICENSE RIGHTS This invention was made with Government support under contract number DE-FG02-07ER84668 awarded by Department of Energy. The Government has certain rights in the invention.