US 12,258,935 B2
Pitch controlled wind turbine with blade connecting members and split blades
Thomas S. Bjertrup Nielsen, Randers Sv (DK); Robert Thomas Rudolf, Aarhus C (DK); and Torben Juul Larsen, Roskilde (DK)
Assigned to Vestas Wind Systems A/S, Aarhus N. (DK)
Appl. No. 18/282,350
Filed by Vestas Wind Systems A/S, Aarhus N (DK)
PCT Filed Mar. 18, 2022, PCT No. PCT/DK2022/050051
§ 371(c)(1), (2) Date Sep. 15, 2023,
PCT Pub. No. WO2022/194333, PCT Pub. Date Sep. 22, 2022.
Claims priority of application No. PA2021 00803 (DK), filed on Mar. 18, 2021.
Prior Publication US 2024/0159212 A1, May 16, 2024
Int. Cl. F03D 1/06 (2006.01)
CPC F03D 1/0664 (2023.08) [F03D 1/066 (2023.08); F03D 1/0677 (2023.08); F05B 2240/302 (2013.01); F05B 2240/912 (2013.01); F05B 2250/311 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A pitch controlled wind turbine comprising:
a tower,
a nacelle mounted on the tower,
a hub mounted rotatably on the nacelle,
at least three wind turbine blades, wherein each wind turbine blade extends between a root end connected to the hub, and a tip end, the wind turbine further comprising at least three blade connecting members, each blade connecting member extending between a connection point on one wind turbine blade and a connection point on a neighbouring wind turbine blade, where the connection point on a given wind turbine blade is arranged at a distance from the root end and at a distance from the tip end of the wind turbine blade, and
at least three pre-tension members, wherein each pre-tension member is connected to one of the blade connecting members and to a hub part, each pre-tension member thereby providing pre-tension in the blade connecting member to which it is connected,
wherein the wind turbine blades each comprises an inboard blade part comprising the root end and an outboard blade part comprising the tip end, the inboard blade part and the outboard blade part being connected to each other at a split position, and
wherein the split position is arranged between the root end and the connection point, and
wherein the connection points of the wind turbine blades are arranged at a distance from the root end which is between 20% and 70% of the length of the wind turbine blades from the root end to the tip end.