Wind turbine blade with protecting layers
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsYasushi Okano, Masaaki Shibata
Life of this patent
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Abstract
A wind turbine blade is provided, which includes a blade body extending from a blade root toward a blade tip along a blade length direction, a first sprayed layer disposed so as to cover at least a leading edge on a side of the blade tip of the blade body, for suppressing erosion of the leading edge of the blade body, a second sprayed layer formed between the blade body and the first sprayed layer, and having a lower electrical resistivity than the first sprayed layer, and a first conductive part for electrically connecting the second sprayed layer to a ground.
Claims11
A wind turbine blade, comprising:
- a blade body extending from a blade root toward a blade tip along a blade length direction;
- a first sprayed layer disposed so as to cover at least a leading edge on a side of the blade tip of the blade body, for suppressing erosion of the leading edge of the blade body;
- a second sprayed layer formed between the blade body and the first sprayed layer, and having a lower electrical resistivity than the first sprayed layer;
- two metallic layers spaced apart from each other in a chord length direction of the blade body, each being disposed on a surface of the blade body and under a part of the second sprayed layer to be electrically connected to the second sprayed layer;
- and
- two conductive parts disposed on a side opposite to the surface of the blade body and electrically connected to the two metallic layers, respectively, for grounding,
- wherein the second sprayed layer is formed by copper, a copper alloy, aluminum, or an aluminum alloy, and has a lower hardness and Young modulus than the first sprayed layer.
A wind turbine blade, comprising:
- a blade body extending from a blade root toward a blade tip along a blade length direction;
- a first sprayed layer disposed so as to cover at least a leading edge on a side of the blade tip of the blade body, for suppressing erosion of the leading edge of the blade body;
- a second sprayed layer formed between the blade body and the first sprayed layer, and having a lower electrical resistivity than the first sprayed layer;
- a base layer formed between the blade body and the second sprayed layer to couple the second sprayed layer and the blade body;
- two metallic layers spaced apart from each other in a chord length direction of the blade body, each being contacted to the second sprayed layer and the base layer to be electrically connected thereto;
- two conductive parts disposed on a side opposite to a surface of the blade body and electrically connected to the two metallic layers, respectively, for grounding,
- wherein the second sprayed layer is formed by copper, a copper alloy, aluminum, or an aluminum alloy, and has a lower hardness and Young modulus than the first sprayed layer.
A wind turbine blade, comprising:
- a blade body extending from a blade root toward a blade tip along a blade length direction;
- a first sprayed layer disposed so as to cover at least a leading edge on a side of the blade tip of the blade body, for suppressing erosion of the leading edge of the blade body;
- a second sprayed layer formed between the blade body and the first sprayed layer, and having a lower electrical resistivity than the first sprayed layer;
- and
- a first conductive part for electrically connecting the second sprayed layer to a ground,
- wherein the second sprayed layer is formed by copper, a copper alloy, aluminum, or an aluminum alloy, and has a lower hardness and Young modulus than the first sprayed layer,
- wherein the blade body includes a receptor connected to the first conductive part,
- wherein the receptor is connected to the second sprayed layer, and
- wherein the receptor includes a plurality of disk receptors disposed separately from each other on the first sprayed layer.
Dependencies are inferred from the claim text.