US 12,104,570 B2
Turbine blade for a wind turbine
Giridhar Ramanujam, Brande (DK)
Assigned to Siemens Gamesa Renewable Energy A/S, Brande (DK)
Appl. No. 18/035,768
Filed by Siemens Gamesa Renewable Energy A/S, Brande (DK)
PCT Filed Nov. 10, 2021, PCT No. PCT/EP2021/081281
§ 371(c)(1), (2) Date May 8, 2023,
PCT Pub. No. WO2022/112008, PCT Pub. Date Jun. 2, 2022.
Claims priority of application No. 20209742 (EP), filed on Nov. 25, 2020.
Prior Publication US 2023/0392576 A1, Dec. 7, 2023
Int. Cl. F03D 1/06 (2006.01); F03D 80/40 (2016.01)
CPC F03D 1/0643 (2023.08) [F03D 1/0648 (2023.08); F03D 80/40 (2016.05); F05B 2240/303 (2020.08); F05B 2240/311 (2013.01); F05B 2280/5001 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A turbine blade for a wind turbine, comprising a blade body with a leading-edge, wherein the blade body is provided with a form changing device covering the leading-edge and extending at least partially along the leading-edge, which form changing device comprises a shell fixed to the blade body, which shell is movable by an actuator between a first position adjacent to the leading-edge and a second position distanced to the leading-edge,
wherein the shell is fixed with both longitudinal ends to a suction side surface and a pressure side surface of the blade body and comprises an elastic section being extended when the shell is moved from the first to the second position,
wherein the shell comprises a first stiff section adjacent to or fixed to the suction side surface and a second stiff section fixed to the pressure side surface, and
wherein the elastic section connects the first stiff section and the second stiff section; and wherein when the actuator is actuated, the elastic section is extended and stretched while respective shapes of the first stiff section and the second stiff section are unchanged.