Abstract:
A method of molding a wind turbine blade in a mold is provided. The method includes applying a film to an inside surface of a mold, assembling component layers for the wind turbine blade on the film, performing curing to harden the component layers, and subsequently removing the cured wind turbine blade from the mold. Also provided is a film suitable for use in a wind turbine blade molding process and a mold suitable for molding a wind turbine blade.
Abstract:
A mandrel for producing a fiber-reinforced composite part, in particular a blade for a wind turbine is disclosed. The mandrel includes an expandable body with an outer surface onto which a fiber material of the fiber-reinforced composite part is layable out. The expandable body is expandable in an expanded state, wherein in the expanded state the outer surface forms an interior shape of the fiber-reinforced composite part to be produced. Moreover, the expandable body is collapsible in a collapsed state.
Abstract:
A wind turbine tower arrangement (10), having: a concrete tower (12) including an upper portion(14) and a base portion (16); a footer (22) beneath the base portion; a plurality of tendons (30), each tendon spanning an entire height of the concrete tower, at least a portion of each tendon arranged external to concrete (42) forming the concrete tower, and each tendon is pre-stressed to provide compressive force to the concrete in the concrete tower; and a plurality of pilings (28). The tendons are secured by the plurality of pilings.
Abstract:
An apparatus (100) for transporting a wind turbine blade (10) on at least two railcars over a railway is provided. The apparatus includes a root end support (22) for supporting the root end (12) of the blade, a mid span support (28) for supporting the mid span (14) of the blade, and a tip displacement limiter (24) for restricting a tip end (16) of the blade from extending beyond a lateral transportation limit (30) imposed by the railroad. The tip displacement limiter exerts a force on the blade which is counter to a force exerted on the blade by the mid span support only when the railcars navigate a design basis curve (32) in the railway to cause a bending of the blade in order to avoid exceeding the lateral transportation limit. The apparatus is particularly useful for the transportation of extra-long or curved wind turbine blades.
Abstract:
A blade for a wind turbine includes at least one heating mat for generating heat, wherein the heating mat is mounted at an outer surface of the blade. The blade further includes at least one through-hole running from an inner space of the blade to the outer surface of the blade. The blade further has at least one conductive element, wherein the conductive element is electrically coupled to the heating mat. The conductive element is inserted in the through-hole for generating an electric connection between the inner space and the outer surface.
Abstract:
The present invention relates to a method for producing a composite structure comprising fiber reinforced material by means of vacuum assisted resin transfer molding, where fiber material is impregnated with liquid resin. The method comprises an evacuation process of a mold cavity by initially providing an under-pressure in a part of the mold cavity in order to provide a first vacuum front having a first pressure gradient oriented towards a first side of the forming structure, and a second vacuum front with a second pressure gradient oriented towards a second side of the forming structure, and controlling the first vacuum front and the second front to move towards the first side and the second side of the forming structure, respectively.
Abstract:
A method of manufacturing a root section of a rotor blade of a wind turbine is disclosed. The method includes assembling a plurality of supporting rods with an interface section to a hub interface of the wind turbine in an essentially circular shape such that there are gaps between the supporting rods; arranging first fibres in the gaps which first fibres are physically and/or chemically compatible with an injection material; placing a first molding tool along an outer surface of the circular shape and a second molding tool along an inner surface of the circular shape, treating the injection material so that it bonds with the first fibres. The invention also concerns a supporting rod holding arrangement for such purpose and a root section of a rotor blade manufactured by such method.
Abstract:
A mould part is provided. The mould part includes a surface with a mould opening, a first arm with a connecting means for connecting a first pulley, the first arm being pivotably attached to a first attachment point of the mould part, a second arm with a connecting means for connecting a second pulley, the second arm being pivotably attached to a second attachment point of the mould part, wherein the second arm is arranged to be locked in at least two different turning positions.
Abstract:
A method for manufacturing a work piece is provided. The method includes preparing fibreglass in a mould, preparing a closed mould cavity around the fibreglass, flushing the closed mould cavity with an oxygen-free gas, injecting resin in the closed mould cavity, and curing the casted work piece. Furthermore, a work piece manufactured by the above method is provided
Abstract:
A method of moulding a wind turbine blade in a mould is provided. The method includes applying a film to an inside surface of a mould, assembling component layers for the wind turbine blade on the film, performing curing to harden the component layers, and subsequently removing the cured wind turbine blade from the mould. Also provided is a film suitable for use in a wind turbine blade moulding process and a mould suitable for moulding a wind turbine blade.