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US 11,891,976 B2Granted
Wind turbine blade and method for manufacturing the same
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsNaota Watanabe, Masaaki Shibata, Toshikazu Shigetomi, Hiroaki Takeuchi, Atsushi Yuge
Life of this patent
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Abstract
A wind turbine blade includes a base member formed of FRP and having a blade shape, an intermediate layer arranged on the base member and formed of metal, cermet, ceramic, or a mixture of at least one thereof and resin as a major constituent, and an erosion-resistant overcoat arranged on the intermediate layer and formed of a spray film having a porosity of 5% or lower.
Claims12
A wind turbine blade comprising:
- a base member formed of FRP and having a blade shape;
- an intermediate layer arranged on the base member and formed of metal, cermet, ceramic, or a composite material of resin and at least one of the metal, the cermet, or the ceramic;
- and
- an erosion-resistant overcoat arranged on the intermediate layer and formed of a spray film having a porosity of 5% or lower,
- wherein
- the spray film forming the erosion-resistant overcoat is formed of cobalt alloy or cermet including tungsten carbide, and
- the intermediate layer includes an intermediate spray film having a higher porosity than that of the spray film forming the erosion-resistant overcoat.
4 more elements
A method for manufacturing a wind turbine blade, comprising steps of:
- forming an intermediate layer formed of metal, cermet, ceramic, or a composite material of resin and at least one of the metal, the cermet, or the ceramic on a base member formed of FRP and having a blade shape;
- and
- forming an erosion-resistant overcoat having a porosity of 5% or less on the intermediate layer with HVOF spraying,
- wherein
- a spray film forming the erosion-resistant overcoat is formed of cobalt alloy or cermet including tungsten carbide, and
- the intermediate layer includes an intermediate spray film having a higher porosity than that of the spray film forming the erosion-resistant overcoat.
3 more elements
Dependencies are inferred from the claim text.