A TRIBRID WIND TURBINE BLADE
First Claim
Patent Images
1. A wind turbine blade having a root portion, a mainboard portion, and a tip portion, wherein:
- the root portion comprises at least one substantially load-bearing spar structure having at least one aerodynamic shell coupled to said spar structure;
the mainboard portion comprises a load-bearing aerodynamic shell; and
the tip portion comprises an integrally-formed tip element.
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Abstract
A tribrid wind turbine blade is described, wherein the blade is formed from three separate parts made using three different manufacturing approaches. A root section of the blade is formed by a load-bearing central spar having an aerodynamic shell or fairing fitted to the spar. A mainboard portion is formed from a load-bearing shell structure. A tip portion is formed as an integrally-formed element from a one-shot closed moulding process.
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Citations
17 Claims
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1. A wind turbine blade having a root portion, a mainboard portion, and a tip portion, wherein:
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the root portion comprises at least one substantially load-bearing spar structure having at least one aerodynamic shell coupled to said spar structure; the mainboard portion comprises a load-bearing aerodynamic shell; and the tip portion comprises an integrally-formed tip element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of manufacturing a wind turbine blade comprising the steps of:
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providing a blade root portion by manufacturing a load-bearing spar structure and fitting at least one aerodynamic shell to said load-bearing internal spar structure; providing a blade mainboard portion by manufacturing portions of a load bearing shell in a negative mould and assembling said portions of a load bearing shell to form said blade mainboard portion, preferably comprising at least one internal bridging spar or web extending between adjacent portions of said load bearing shell; providing a blade tip portion by manufacturing a single tip element using an integral moulding procedure; and assembling said blade root portion, said blade mainboard portion, and said blade tip portion to form a wind turbine blade.
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Specification