Patent ID: 11933264
Assignee: VESTAS WIND SYSTEMS A/S
Field: Other special machines (Mechanical engineering)
Classification: CPC F  B  Y | IPC B  F

Claim 0:
1. A wind turbine blade for use on a wind turbine, comprising:
a main body forming at least a lengthwise portion of the blade, the main body including a plurality of layers such that a cross section of the main body includes a first region of a first density that surrounds a second region having a volume of void space and being of a second density, the first density being greater than the second density due to the volume of void space in the second region;
at least one recess formed in the first region of the main body;
a structural element positioned in the at least one recess, wherein the structural element has a stiffness greater than a stiffness of the first region and is configured to reinforce the lengthwise portion of the blade under load during use of the wind turbine; and
a surface layer that bounds the first region and that forms an exterior surface of the blade.