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Tip cap for a turbine rotor blade

United States Patent

March 25, 2014
View the Complete Patent at the US Patent & Trademark Office
A turbine rotor blade with a spar and shell construction, and a tip cap that includes a row of lugs extending from a bottom side that form dovetail grooves that engage with similar shaped lugs and grooves on a tip end of the spar to secure the tip cap to the spar against radial displacement. The lug on the trailing edge end of the tip cap is aligned perpendicular to a chordwise line of the blade in the trailing edge region in order to minimize stress due to the lugs wanting to bend under high centrifugal loads. A two piece tip cap with lugs at different angles will reduce the bending stress even more.
Kimmel; Keith D (Jupiter, FL)
Florida Turbine Technologies, Inc. (Jupiter, FL)
12/ 606,463
October 27, 2009
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.