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US 11,493,020 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
Estimating the term…
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.
Claims13
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 intermediate layer includes an intermediate spray film having a higher porosity than that of the spray film forming the erosion-resistant overcoat, and
- wherein a ratio of the porosity of the intermediate spray film to the porosity of the spray film forming the erosion-resistant overcoat is 3 or higher.
3 more elements
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 intermediate layer includes an intermediate spray film having a higher porosity than that of the spray film forming the erosion-resistant overcoat,
- the porosity of the spray film forming the erosion-resistant overcoat is 3% or lower, and
- the porosity of the intermediate spray film is 6% or higher.
5 more elements
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 intermediate layer includes a metal tape.
2 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 the intermediate layer includes an intermediate spray film having a higher porosity than that of the spray film forming the erosion-resistant overcoat, and
- wherein the intermediate layer satisfies at least one of:
- a first condition that a ratio of the porosity of the intermediate spray film to the porosity of the spray film forming the erosion-resistant overcoat is 3 or higher, or
- a second condition that the porosity of the spray film forming the erosion-resistant overcoat is 3% or lower, and the porosity of the intermediate spray film is 6% or higher.
4 more elements
Dependencies are inferred from the claim text.