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US 8,506,255 B2Granted
Rotor blade for a wind turbine
OwnerAloys Wobbeninventor
Life of this patent
Estimating the term…
Abstract
A rotor blade of a wind power installation in which the rotor blade, in particular in the central region of the rotor, the so-called main board, has a lift-drag ratio which in the region of about ±2° from the optimum pitch angle has a lift-drag ratio value of more than 80%, preferably 90% and more of the maximum value of the lift-drag ratio.
Claims8
A pitchable wind power installation rotor blade comprising:
- a wind power installation rotor blade tip or a wind power installation rotor blade tip end plate which rises out of a plane of the pitchable wind power installation rotor blade in a manner of a winglet;
- a rotor blade root region;
- and
- a rotor blade central region between the rotor blade root region and the wind power installation rotor blade tip or wind power installation rotor blade tip end plate, wherein said wind power installation rotor blade tip or wind power installation rotor blade tip end plate is turned about a thread axis in its central plane by 4 to 8 degrees.
1 more element
A method of manufacturing a pitchable wind power installation rotor blade of a wind power installation, the method comprising:
- defining a wind power installation rotor blade tip portion or wind power installation rotor blade tip end plate, a rotor blade root region, and a wind power installation rotor blade central portion between the rotor blade root region and the wind power installation rotor blade tip portion or the wind power installation rotor blade tip end plate;
- configuring the wind power installation rotor blade tip portion or wind power installation rotor blade tip end plate to rise out of a plane of the pitchable wind power installation rotor blade in a manner of a winglet, wherein said wind power installation rotor blade tip portion or wind power installation rotor blade tip end plate is turned about a thread axis in its central plane by 4 to 8 degrees;
- and
- coupling together the wind power installation rotor blade tip portion or wind power installation rotor blade tip end plate, the rotor blade root region, and the wind power installation rotor blade central portion.
1 more element
Dependencies are inferred from the claim text.