US 12,241,448 B2
Segmented wind turbine blade
Rama Razeghi, Eastleigh (GB)
Assigned to BLADE DYNAMICS LIMITED, Eastleigh (GB)
Appl. No. 17/801,912
Filed by BLADE DYNAMICS LIMITED, Eastleigh (GB)
PCT Filed Apr. 28, 2020, PCT No. PCT/EP2020/061708
§ 371(c)(1), (2) Date Aug. 24, 2022,
PCT Pub. No. WO2021/219198, PCT Pub. Date Nov. 4, 2021.
Prior Publication US 2023/0083629 A1, Mar. 16, 2023
Int. Cl. F03D 1/06 (2006.01); F03D 13/10 (2016.01)
CPC F03D 1/0675 (2013.01) [F05B 2240/302 (2013.01); F05B 2280/6003 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A segmented wind turbine blade having a profiled contour including a pressure side and a suction side, and a leading edge and a trailing edge with a chord extending therebetween, the wind turbine blade extending in a longitudinal direction between a root end and a tip end, the segmented wind turbine blade comprising:
a first blade segment comprising a female spar part defining an inner cavity and having a longitudinal inner end and an opposite longitudinal open end at an end face of the first blade segment;
a second blade segment connected to the first blade segment at a chord-wise joint and comprising a male spar part having a protruding portion protruding at the joint from an end face of the second blade segment and extending through the longitudinal open end of and into the cavity of the female spar part to be received therein;
locking means mutually locking the female and male spar parts and thereby the first and second blade segment; and
a pressure side spar cap connected to an inner surface of a pressure side shell portion of the first blade segment and a suction side spar cap connected to an inner surface of a suction side shell portion of the first blade segment extend from the end face thereof longitudinally over at least a majority of an extent of the first blade segment,
wherein at least one of the pressure side spar cap and the suction side spar cap of the first blade segment comprises:
a first spar cap portion made from pultrusions;
a second spar cap portion connected to an outer surface of the female spar part; and
a longitudinally extending scarf connection between the first spar cap portion and the second spar cap portion,
wherein the longitudinally extending scarf connection is spaced from, adjoins or partially overlaps the longitudinal inner end of the female spar part in the longitudinal direction of the blade, and
wherein the first spar cap portion has a first thickness and the second spar cap portion has a second thickness, the second thickness of the second spar cap being smaller than the first thickness of the first spar cap portion.