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US 6,786,696 B2Granted
Root notched turbine blade
AssigneeGeneral Electric Company
InventorsWilliam Charles Herman, Brian Alan Norton, Brian David Keith
Life of this patent
Estimating the term…
Abstract
A turbine blade includes an airfoil and dovetail. The dovetail includes a pair of supporting tangs. A rectangular root block bridges the tangs over a majority of the root end thereof. The block terminates short of one endface of the dovetail to form a root notch thereat for preferentially reducing weight.
Claims20
A turbine blade comprising:
- an airfoil integrally joined to a dovetail, and including a leading edge and an axially opposite trailing edge;
- said dovetail includes a pair of laterally opposite upper tangs and a pair of lower tangs joined thereto by a neck therebetween, with said double tang pairs being symmetrical for supporting said blade in a complementary slot in the perimeter of a rotor disk;
- and
- said dovetail further includes a rectangular root block bridging said lower tangs over a majority of a root end thereof and commencing at an aft endface of said dovetail and terminating at least in part short of an axially opposite forward endface of said dovetail to form a root notch thereat.
1 more element
A turbine blade comprising:
- an airfoil integrally joined to a dovetail;
- said dovetail including a pair of laterally opposite tangs for supporting said blade in a complementary slot in the perimeter of a rotor disk;
- said dovetail further including a rectangular root block bridging said tangs over a majority of a root end thereof and commencing at a first endface of said dovetail and terminating at least in part short of an axially opposite second endface of said dovetail to form a root notch thereat.
Dependencies are inferred from the claim text.