US 11,988,187 B1
Wind turbine blade with self-adaptive tip-sweep
Md. Zishan Akhter, Al-Ain (AE); and Farag Khalifa Omar, Al-Ain (AE)
Assigned to United Arab Emirates University, Al-Ain (AE)
Filed by UNITED ARAB EMIRATES UNIVERSITY, Al-Ain (AE)
Filed on Jul. 13, 2023, as Appl. No. 18/352,075.
Int. Cl. F03D 1/06 (2006.01)
CPC F03D 1/0649 (2023.08) [F03D 1/0642 (2023.08); F03D 1/0643 (2023.08); F03D 1/0687 (2023.08); F05B 2240/303 (2020.08); F05B 2240/306 (2020.08); F05B 2240/307 (2020.08); F05B 2240/311 (2013.01); F05B 2280/5001 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A blade for a rotor of a wind turbine (1), the blade comprising:
an inboard portion;
an outboard portion connected to the inboard portion, wherein the outboard portion is deflectable by a variable sweep angle (θ) in an edgewise direction of the blade; and
a passive mechanism configured to adjust the sweep angle in response to an amount of flapwise moment acting on the blade, such that the magnitude of the sweep angle (|θ|) increases in response to an increased flapwise moment, and decreases in response to a decreased flapwise moment.
 
17. A wind turbine rotor comprising a plurality of blades, wherein each blade comprises:
an inboard portion; and
an outboard portion connected to the inboard portion, wherein the outboard portion is deflectable by a variable sweep angle (θ) in the edgewise direction of the blade; and
wherein the wind turbine rotor comprises a passive mechanism configured to adjust the sweep angle in response to an amount of flapwise moment acting on the blade, such that the magnitude of the sweep angle (|θ|) increases in response to an increased flapwise moment, and decreases in response to a decreased flapwise moment.
 
18. A wind turbine having the wind turbine rotor of claim 17.