摘要:
A wind turbine blade which is at least 45m long. The blade has a main axis in the lengthwise direction from root to tip and an aerodynamic shell surrounding a spar which extends in a lengthwise direction along a substantial proportion of the blade at least a portion of the half of the shell closest to the tip. The blade is reinforced by high stiffness fibres having a Young's modulus to density ratio of greater than 50 GPa/(g·cm−3), and an electrical resistivity of greater than 1010 Ω·cm. The fibres are biaxial with a first axis angled with respect to the main axis at an acute angle and a second axis angled with respect to the main axis at an acute angle in the opposite sense to the first angle.
摘要:
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.
摘要:
A composite member comprises first and second elongate composite elements. Each has a wedge shaped end with a complimentary tapered end surface. At least one of the components is formed of a stack of fibre layers impregnated in resin, with the tapered end surface being formed by each fibre layer extending longitudinally progressively further than the adjacent layer towards the thin end of the wedge at which the fibre layers have the greatest longitudinal extent. The components are joined at their tapered ends by an adhesive, and the properties of the cured composite material of the at least one component and/or the properties of the adhesive are different in the vicinity of the thin end of the wedge as compared to the rest of the tapered surface in order to reduce the stress concentrations in this region.
摘要:
A sparcap for a spar structure inside a wind turbine blade is provided. A down conductor element is integrated on a side of the sparcap such that after assembly of the sparcap into the spar structure, the down conductor element extends along an outer corner of the spar structure.
摘要:
A rotor blade assembly includes a rotor blade defining a pressure side and a suction side extending between a leading edge and a trailing edge. Further, the rotor blade assembly includes at least one structural feature secured within the rotor blade and spaced apart from the trailing edge to define a void between the pressure side, the suction side, and the trailing edge. Moreover, the rotor blade assembly includes an adhesive filling the void between the pressure side, the suction side, and the trailing edge to provide an adhesive connection between the pressure side, the suction side, the trailing edge, and the structural feature(s). In addition, the adhesive contacts the structural feature(s) at an interface and defines a fillet profile.
摘要:
The present invention relates to a method of moulding a composite article using a mould. The mould includes first and second rigid mould parts between them defining a mould cavity. A reservoir of resin is connected to an inlet into the mould cavity. A suction pump is connected to a port on the opposite side of the mould cavity from the inlet. At least one of the mould parts has an arrangement of grooves on the surface facing the mould cavity to distribute resin across the mould cavity. The method includes laying up fibres in the mould cavity, injecting resin from the reservoir by running the suction pump to fill the mould cavity with resin, curing the resin article to form a moulded article and opening the mould and removing the article.
摘要:
Disclosed is a tip section for a wind turbine blade. The tip section comprises an intermediary blade section comprising a first shell part forming a first side of the intermediary blade section and a second shell part forming a second side of the intermediary blade section, the intermediary blade section having a leading edge and a trailing edge and extending from an intermediary blade section first end to an intermediary blade section second end; a tip part forming an end of the tip section and having been rigidly attached to the intermediary blade section first end, the tip part having an outer surface comprising a metal area; and a number of one or more superficial metal strips extending along an outer surface of the intermediary blade section. A wind turbine blade with such a tip section and the manufacturing of such a wind turbine blade is also disclosed.
摘要:
A wind turbine blade and a method of moulding a wind turbine blade tip section. The overall wind turbine blade has an elongate structure extending in a radial sense in a finished wind turbine. The blade comprises a fairing that one is supported along its length by a spar extended along the full length of the fairing from the root end to the tip. The fairing is in two parts with a main part extending from the root for most the of the longitudinal length of the blade and the tip section forming the remainder of the blade.
摘要:
A method of forming a scarf joint between first and second elongate composite components, each having a complimentary tapered end surface is disclosed. At least one of the components is formed of a stack of fibre layers impregnated in resin, with the tapered end surface being formed by each fibre layer extending longitudinally progressively further than the adjacent layer. The method comprises applying adhesive to at least one of the tapered end surfaces, attaching a moulding tool around the first and second elongate components with their tapered end surfaces being adjacent to one another, applying a positive pressure increase to urge the tapered surfaces towards one another without locally reducing the pressure below the vapour pressure of the resin or adhesive throughout the curing process, and curing the resin and adhesive in the moulding tool with the pressure applied.
摘要:
An erosion resistant aerodynamic fairing for a rotor blade. A fairing body is formed from at least one reinforcing fibre layer set in a cured resin. An erosion resistant pre-form is fixed to an outer surface of the fairing body. The erosion resistant pre-form comprises a thermoplastic film outer layer fused to a fibre substrate. The fibre substrate of the erosion resistant pre-form is impregnated with the cured resin of the fairing body which fixes at the preform to the fairing body.