Wind turbine blade and method for manufacturing a wind turbine blade
AssigneeSiemens Gamesa Renewable Energy A/S
InventorsSoeren Randrup Daugaard Henrichsen, Jens Grandjean Joergensen
Life of this patent
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Abstract
A wind turbine blade is provided, including two planks joined with each other in a longitudinal direction of the planks at joining surfaces by a butt joint, wherein each plank includes a main portion with a wedge-shaped recess and a wedge-shaped portion filling the recess, each wedge-shaped portion has a respective one of the joining surfaces and is tapered from its joining surface in a direction away from its joining surface, and a stiffness of a material of the wedge-shaped portions is smaller than a stiffness of a material of the main portions. By having the wedge-shaped portions, the load is transferred to the surrounding material over a larger area which reduces the stress concentration.
Claims15
A wind turbine blade, comprising two planks joined with each other in a longitudinal direction of the two planks at joining surfaces by a butt joint, wherein:
- each plank comprises a main portion with a wedge-shaped recess and a wedge-shaped portion filling the edge-shaped recess;
- each wedge-shaped portion has a respective one of the joining surfaces and is tapered from a joining surface in a direction away from the joining surface;
- and
- a stiffness of a material of the wedge-shaped portion is smaller than a stiffness of a material of the main portions.
A method for manufacturing a wind turbine blade, comprising:
- providing two planks each comprising a main portion with a wedge-shaped recess and a wedge-shaped portion filling the wedge-shaped recess, wherein each wedge-shaped portion has a joining surface and is tapered from a joining surface in a direction away from its the joining surface, and a stiffness of a material of the wedge-shaped portions is smaller than a stiffness of a material of the main portions, and
- joining the two planks with each other in a longitudinal direction of the planks at the joining surfaces by a butt joint.
Dependencies are inferred from the claim text.