Wind turbine blade with lightning receptor and method for protecting the surface of a wind turbine blade
View Patent ↗A wind turbine blade has at least one lightning receptor, wherein at least part of a surface of the wind turbine blade close to the lightning receptor is covered by a protective layer having electrical and thermal insulating material. Moreover, a method for protecting the surface of a wind turbine blade close to a lightning protector against temperature increase resulting from lightning impact is disclosed. At least part of the surface of the wind turbine blade is covered with a protective layer having electrical and thermal insulating material.
1. A wind turbine blade, comprising:
a lightning receptor;
wherein a part of a surface of the wind turbine blade adjacent to the lightning receptor is covered by a protective layer which is formed as a disc of ceramic or polytetrafluorethylene as an electrical and thermal insulating material and wherein the protective layer surrounds the lightning receptor.
2. The wind turbine blade as claimed in claim 1 , wherein the protective layer covers the surface of the blade within at least 10 cm of the receptor.
3. The wind turbine blade as claimed in claim 1 , wherein the protective layer comprises at least one patch with an opening for the receptor.
4. The wind turbine blade as claimed in claim 1 , wherein the protective layer comprises at least one opening for the receptor.
5. The wind turbine blade as claimed in claim 1 , further comprising:
glass fibre laminate, wherein the protective layer is an integrated part of the glass fibre laminate.
6. A method for protecting the surface of a wind turbine blade adjacent to a lightning receptor against temperature increase resulting from lightning impact, comprising:
covering a part of a surface of the wind turbine blade with a protective layer which is formed as a disc of ceramic or polytetrafluorethylene as an electrical and thermal insulating material and wherein the protective layer surrounds the lightning receptor.
7. The method as claimed in claim 6 , further comprising:
gluing the protective layer onto the surface of the wind turbine blade.
8. The method as claimed in claim 6 , further comprising:
integrating the protective layer in a laminated structure of the wind turbine blade.
9. The method as claimed in claim 6 , further comprising:
mounting the protective layer in a cut-out part of the surface of the wind turbine blade; and
retaining the protective layer by the lightning receptor.
10. The method as claimed in claim 7 , further comprising:
mounting the protective layer in a cut-out part of the surface of the wind turbine blade; and
retaining the protective layer by the lightning receptor.