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US 7,802,968 B2Granted
Methods and apparatus for reducing load in a rotor blade
AssigneeGeneral Electric Company
InventorEric Morgan Jacobsen
Life of this patent
Estimating the term…
Abstract
A blade includes a plurality of first fibers, wherein each of the plurality of first fibers is angled between about 5° and about 35° with respect to a pitch axis of the blade, and a plurality of second fibers, wherein each of the plurality of second fibers is angled between about 95° and about 125° with respect to the pitch axis of the blade.
Claims16
A blade comprising:
- a plurality of first fibers, wherein each of said plurality of first fibers is angled between 5° and 35° with respect to a pitch axis of said blade;
- and
- a plurality of second fibers, wherein each of said plurality of second fibers is angled between 95° and 125° with respect to the pitch axis of said blade, wherein said plurality of first fibers is heavier than said plurality of second fibers, and wherein said plurality of first fibers and said plurality of second fibers are disposed to facilitate a twist of said blade about the pitch axis in response to an aerodynamic bending load on said blade.
A wind turbine comprising a rotor having a hub and at least one blade extending outwardly from the hub, said blade comprising:
- a plurality of first fibers, wherein each of said plurality of first fibers is angled between 5° and 35° with respect to a pitch axis of said blade;
- and
- a plurality of second fibers, wherein each of said plurality of second fibers is angled between 95° and 125° with respect to the pitch axis of said blade, wherein said plurality of first fibers is heavier than said plurality of second fibers, and wherein said plurality of first fibers and said plurality of second fibers are disposed to facilitate a twist of said at least one blade about the pitch axis in response to an aerodynamic bending load on said at least one blade.
A blade comprising:
- a plurality of first fibers, wherein each of said plurality of first fibers is angled between 5° and 35° with respect to a pitch axis of said blade;
- a plurality of second fibers, wherein each of said plurality of second fibers is angled between 95° and 125° with respect to the pitch axis of said blade, said plurality of first fibers and said plurality of second fibers disposed to facilitate a twist of said blade about the pitch axis in response to an aerodynamic bending load on said blade;
- and
- a plurality of third fibers resin-bonded to each other and disposed between a 25% spanwise length and a 95% spanwise length of said blade, wherein said plurality of third fibers is angled at between 40° and 50° with respect to the pitch axis of said blade and comprises no more than 10% of the weight of a shell of the blade.
1 more element
Dependencies are inferred from the claim text.