US 12,078,149 B2
Cross-flow wind turbine with twin blades and inclined rotation axes
Jean-Luc Achard, Voreppe (FR); and Sébastien Cussac, Voreppe (FR)
Assigned to Collaborative Energy, Voreppe (FR)
Appl. No. 18/547,083
Filed by COLLABORATIVE ENERGY, Voreppe (FR)
PCT Filed Feb. 16, 2022, PCT No. PCT/EP2022/053753
§ 371(c)(1), (2) Date Aug. 18, 2023,
PCT Pub. No. WO2022/175301, PCT Pub. Date Aug. 25, 2022.
Claims priority of application No. 2101609 (FR), filed on Feb. 18, 2021.
Prior Publication US 2024/0141866 A1, May 2, 2024
Int. Cl. F03D 3/00 (2006.01); F03D 3/02 (2006.01); F03D 9/25 (2016.01); F03D 15/00 (2016.01)
CPC F03D 3/02 (2013.01) [F03D 3/005 (2013.01); F03D 3/011 (2023.08); F03D 9/25 (2016.05); F03D 15/00 (2016.05); F05B 2220/706 (2013.01); F05B 2240/212 (2013.01); F05B 2240/37 (2020.08)] 24 Claims
OG exemplary drawing
 
1. A Darrieus wind turbine comprising twin cross-flow turbines connected to a generator, the generator comprising a shaft designed to be driven in rotation under the effect of a rotation of the turbines, the wind turbine comprising:
a first turbine movable in rotation about a first rotation axis, the first turbine comprising several blades distributed about the first rotation axis,
a second turbine movable in rotation about a second rotation axis, the second turbine comprising several blades distributed about the second rotation axis,
the first rotation axis and the second rotation axis being symmetrical to each other with respect to a vertical axis,
wherein:
each turbine extends about a rotation axis between a lower end and an upper end, the lower end being closer to the generator than the upper end,
the lower end and the upper end of each turbine are aligned with the rotation axis of said turbine,
each turbine blade comprises:
a lower portion, extending from the lower end,
an upper portion, extending from the upper end,
each blade extending from the lower end towards the upper end so that:
the radius of the blade, corresponding to the distance between the blade and the rotation axis along the lower portion, gradually increases as the distance from the lower end increases,
the radius of the blade gradually decreases along the upper portion as the distance from the upper end decreases,
and wherein:
the first rotation axis and the second rotation axis are inclined with respect to the vertical axis at the same angle of inclination of between 25° and 50°,
so that each rotation axis converges on a single generator, so that the horizontal shaft of the generator is driven in rotation by the first turbine and by the second turbine,
the wind turbine defines a median plane, the median plane:
being perpendicular to a downstream plane, the downstream plane containing the first rotation axis and the second rotation axis,
passing through a point of intersection of the first rotation axis and the second rotation axis,
the median plane forms a plane of symmetry of the wind turbine.