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US 11,761,420 B2Granted
Composite material, a wind turbine blade, a wind turbine and a method for producing a composite material
AssigneeSiemens Games Renewable Energy A/S
InventorThomas Bro Wernlund
Life of this patent
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Abstract
Provided is a composite material for a wind turbine blade, the composite material including a plurality of rigid elements and plurality of flexible elements, wherein each flexible element is arranged between two rigid elements and is connected thereto such that the rigid elements are flexibly connected to each other by the flexible elements. The flexibility of the composite material can be achieved by using the interspaces between the rigid elements. Therefore, when the composite material is placed on a curved surface, hollow spaces between the rigid elements may be reduced or avoided.
Claims13
A wind turbine blade for a wind turbine comprising:
- a module comprising a composite material, the composite material having a sequence of elements consisting of rigid elements and flexible elements alternating with respect to each other, wherein a first element of the sequence is one rigid element of the rigid elements and a last element of the sequence is another rigid element of the rigid elements, wherein all rigid and flexible elements are in the sequence of elements within the composite material of the module,
- wherein each flexible element is arranged between two of the plurality of rigid elements and is connected thereto such that the rigid elements are flexibly connected to each other by the flexible elements,
- wherein each respective flexible element is connected to the respective two of the plurality of rigid elements by an adhesive placed between the respective flexible element and the respective two of the plurality of rigid elements or by hot plate welding,
- wherein the rigid elements and the flexible elements are bar-shaped with a length at least several times greater than a height and width,
- wherein the flexible elements are plastically or elastically deformable, and
- wherein the composite material is flexible in a bending direction around a longitudinal axis of the rigid element and is configured for reinforcing a blade shell of the wind turbine blade.
3 more elements
A wind turbine comprising:
- a wind turbine blade that includes a module comprising a composite material, the composite material having a sequence of elements consisting of rigid elements and flexible elements alternating with respect to each other, wherein a first element of the sequence is one rigid element of the rigid elements and a last element of the sequence is another rigid element of the rigid elements, wherein all rigid and flexible elements are in the sequence of elements within the composite material of the module,
- wherein each flexible element is arranged between two of the plurality of rigid elements and is connected thereto such that the rigid elements are flexibly connected to each other by the flexible elements,
- wherein each respective flexible element is connected to respective rigid elements by an adhesive placed between the respective flexible element and the respective flexible rigid elements or by hot plate welding,
- wherein the rigid elements and the flexible elements are bar-shaped with a length at least several times greater than a height and width,
- wherein the flexible elements are plastically or elastically deformable, and
- wherein the composite material is flexible in a bending direction around a longitudinal axis of the rigid elements and is configured for reinforcing a blade shell of the wind turbine blade.
3 more elements
A method for producing a wind turbine blade, the method comprising the steps of:
- a) providing a plurality of rigid elements, each rigid element having a height H1;
- b) providing a plurality of flexible elements, each flexible element having a height H1;
- c) arranging each flexible element between two rigid elements;
- d) connecting each flexible element to two rigid elements by an adhesive placed between each flexible element and the two respective rigid elements or by hot plate welding such that the two respective rigid elements are flexibly connected to each other by the flexible elements to form a composite material;
- (e) cutting the composite material to form a block having a specified width W1;
- (f) cutting the block into multiple modules, each module having a height H, wherein H1/H is at least 3;
- and
- (g) connecting one module of the multiple modules to a curve surface of a blade shell of the wind turbine blade,
- wherein the rigid elements and the flexible elements are bar-shaped with a length at least several times greater than a height and width,
- wherein the flexible elements are plastically deformable, and
- wherein the composite material is flexible in a bending direction around a longitudinal axis of the rigid elements and is configured for reinforcing the blade shell of the wind turbine blade.
8 more elements
Dependencies are inferred from the claim text.