Wind turbine blade
AssigneesBlade Dynamics Limited, Lm Wind Power A/S
InventorsRama Razeghi, Paul Trevor Hayden, Klavs Jespersen, Michael Lund-Laverick
Life of this patent
Estimating the term…
Abstract
A method of manufacturing a wind turbine blade, comprising the steps of: placing one or more shell fibre layers on a mould surface of a blade mould, placing a plurality of separately provided preforms directly on the one or more shell fibre layers in a stacked arrangement, infusing and curing the stacked preform arrangement, the one or more shell fibre layers together via a resin in mould cavity of the blade mould to form a wind turbine blade part with a spar cap integrated in a shell part providing part of the aerodynamic shape of the wind turbine blade.
Claims16
A method of manufacturing a wind turbine blade extending along a longitudinal direction from a blade root through a root region and an airfoil region to a tip region with a blade tip, the wind turbine blade having a profiled contour including a pressure side, a suction side and a chord line extending between a leading edge and a trailing edge, the wind turbine blade comprising a shell providing an aerodynamic shape of the wind turbine blade and a spar cap forming a load carrying structure of the wind turbine blade, the method comprising the steps of:
- providing a blade mould for a wind turbine blade part having a mould cavity with a mould surface;
- placing one or more shell fibre layers and optionally an exterior coat on the blade mould surface;
- placing a plurality of separately provided preforms directly on the one or more shell fibre layers in a stacked arrangement, wherein each of the preforms comprises a mixture of fibre material and a binding agent, wherein the fibre material of each preform is at least partially joined together by means of the binding agent;
- infusing the stacked preform arrangement, the one or more shell fibre layers and, optionally the exterior coat, with a resin in mould cavity of the blade mould, each of the preforms plastically conforming to the mould surface during the infusing;
- and
- curing the stacked preform arrangement, the one or more shell fibre layers and, optionally the exterior coat, together via the resin to form a wind turbine blade part with a spar cap integrated in a shell part providing part of the aerodynamic shape of the wind turbine blade.
A wind turbine blade with a profiled contour including a pressure side and a suction side with a thickness direction extending therebetween, and a leading edge and a trailing edge with a chord having a chordwise direction extending therebetween, the wind turbine blade extending in a spanwise direction between a root end and a tip end, a spar cap extending in the spanwise direction, the chordwise direction, and the thickness direction, the wind turbine blade comprising:
- an exterior shell providing the profiled contour of the wind turbine blade and comprising one or more shell fibre layers;
- and
- the spar cap being a sandwich-structured composite including one or more inner fibre layers and a core portion sandwiched between the one or more inner fibre layers and the exterior shell, the core portion comprising a plurality of separately provided preforms arranged in a stacked preform arrangement, wherein each of the preforms comprises a mixture of fibre material and a binding agent, wherein the fibre material is at least partially joined together by means of the binding agent, wherein the plurality of preforms and the exterior shell are joined together by means of a resin, wherein each of the preforms plastically conforms to the exterior shell,
- wherein an end of the stacked preform arrangement facing the leading edge or the trailing edge of the wind turbine blade is beveled and an end of the stacked preform arrangement facing the interior of the wind turbine blade defines an acute angle with a beveled side, wherein the beveled side of the stacked preform arrangement and a beveled side of the core insert form a scarf joint.
A wind turbine blade with a profiled contour including a pressure side and a suction side with a thickness direction extending therebetween, and a leading edge and a trailing edge with a chord having a chordwise direction extending therebetween, the wind turbine blade extending in a spanwise direction between a root end and a tip end, a spar cap extending in the spanwise direction, the chordwise direction, and the thickness direction, the wind turbine blade comprising:
- an exterior shell providing the profiled contour of the wind turbine blade and comprising one or more shell fibre layers;
- and
- the spar cap being a sandwich-structured composite including one or more inner fibre layers and a core portion sandwiched between the one or more inner fibre layers and the exterior shell, the core portion comprising a plurality of separately provided preforms arranged in a stacked preform arrangement, wherein each of the preforms comprises a mixture of fibre material and a binding agent, wherein the fibre material is at least partially joined together by means of the binding agent, wherein the plurality of preforms and the exterior shell are joined together by means of a resin, wherein each of the preforms plastically conforms to the exterior shell,
- wherein an end of the stacked preform arrangement facing the leading edge or the trailing edge of the wind turbine blade is beveled and an end of the stacked preform arrangement facing the exterior of the wind turbine blade defines an acute angle with a beveled side, wherein the beveled side of the stacked preform arrangement and a beveled side of the core insert form a scarf joint.
Dependencies are inferred from the claim text.