Abstract:
A method of assessing an adhesive bond between first and second components of a wind turbine blade, the method comprising: moving a vehicle to a test site provided on a surface of one of the components, using the vehicle to apply an impulse force to the test site, using the vehicle to record an acoustic response data set corresponding to the impulse force applied to the test site, analysing the acoustic response and determining whether there is a defect in the bond between the components at the test site based on the analysis. Beneficially, therefore, a vehicle is used to crawl within the internal volume of a wind turbine blade in order to assess the adhesive bonding between components, particularly structural component, which would otherwise be very difficult to reach given the restricted space within the blade. The invention also resides in a vehicle configured for use in the method.
Abstract:
The invention includes a method for manufacturing an elongated composite material object, such as a wind turbine blade part, for example a wind turbine blade spar, the method comprising the steps of - providing a first strip including a resin for the composite material of the elongated composite material object, - providing a second strip including a fibrous material for the composite material of the elongated composite material object, but not including any resin for the composite material of the elongated composite material object, - providing an elongated tool, such as a mandrel, - winding simultaneously the first and second strips around the tool, so as to deposit the first and second strips onto the tool, or onto a material provided on the tool, and - allowing, after the step of winding, at least a part of the resin, provided by the first strip, to impregnate the fibrous material of the second strip.
Abstract:
The present invention relates to a fibre sheet material and method of laying up fibre sheet material to manufacture wind turbine blades. The invention further comprises a blade manufactured by the method as well as a use of such a blade. One aspect relates to an oblong fibre sheet material(26)for wind turbine blades, where a surface layer (14) is having a width, which in the lateral direction is broader than a lateral, unidirectional layer (10), and lengthwise side faces of at least the surface layer is provided with a thinning of a thickness of the layer to obtain favourable joints. Another aspect concerns manufacturing a wind turbine blade shell comprising laying fibre sheet (26) materials in a blade mould (20), where the sheet materials lengthwise are positioned in a direction corresponding to a chordwise direction of a turbine blade direction of the mould and overlapping in a spanwise direction. The effect obtained is a significant reduction in the amount of waste material compared to laying fibre sheets in the spanwise direction.
Abstract:
A method apparatus of tapering an edge of a fibrous reinforcement sheet (14) for a composite structure is described. The method includes supporting the sheet against a support (12) and creating a tapered edge by relative translational movement of a cutting tool (16) with respect to the supported sheet. A cutting element (18) of the tool is acutely angled with respect to the supported sheet to develop an inclined cutting plane (32) during the relative translational movement between the tool and the sheet. The sheet (14) has an inner side lying against a supporting surface (20) of the support and the cutting plane (32) projected through the sheet intersects the inner side of the sheet.
Abstract:
An abrading element (2,20,30,41,50,60,70,80,100) for use in an abrading machine having an abrading head comprises a support (3,42)) having a mounting portion (4,22,44,52) along an edge region which defines an profile typically of dovetail cross - section for receipt in an undercut slot or recess (23) within the machine head (25) from which extends a resilient support portion (6,24,32,46,58,72) on which is supported and secured an abrasive material such as an abrasive sheet-like material (12,26,43,92) or abrasive grit (38,60).
Abstract:
The invention relates to a rotor blade for a wind turbine. The rotor blade comprises a shell and a spar forming a longitudinally extending hollow structure within the shell and comprising : a leading web, a trailing web, and one or more additional webs. Each additional web defines an intermediate portion between a hub end and a tip end. The intermediate portion of each additional web is spaced apart from the leading and trailing webs and at least one of the tip and the hub ends is connected to or integral with the leading or the trailing web. The invention further relates to a wind turbine comprising the rotor blade, and a method for manufacturing the rotor blade.
Abstract:
The invention provides a method for preparing a pre-form comprising at least two layers of fibre tows (6), these layers being at least partly fixed by a resin (11). The method comprising steps of providing a work surface (3), and alternating distribution of layers of resin (11) and layers of fibre tows (6).
Abstract:
The invention relates to a wind turbine rotor comprising at least one blade and at least on pitch mechanism comprising a ring shaped motor for controlling the blade. The wind turbine rotor is characterized in that, the ring shaped motor controls the blade through gearing means of a planetary type. The invention further relates to a rotation controlling mechanism comprising, at least one ring shaped motor for controlling the rotation of at least one first part in relation to at least one second part. The rotation controlling mechanism is characterized in that, the ring shaped motor controls the relative rotation through gearing means of a planetary type. Even further the invention relates to a method for controlling at least one blade of a wind turbine rotor.
Abstract:
The invention relates to a method for manufacturing a wind turbine blade (5) or a section of a wind turbine blade (5). The method comprises the steps of, establishing a first part (8) comprising a first wind turbine blade part (9) in a first fixating unit (10), establishing a second part (11) comprising a second wind turbine blade part (12) in a second fixating unit (13), and positioning the first part (8) in contact with, or in close proximity of, the second part (11). After this a pressure below atmospheric pressure is established, forcing the first wind turbine blade part (9) and the second wind turbine blade part (12) against each other. The invention further relates to a wind turbine blade manufacturing facility, wind turbine blades (5) as well as uses hereof.
Abstract:
The invention relates to a wind turbine blade (5) comprising at least two wind turbine blade sections (12, 13) that include one or more strengthening structures (6, 6a, 6b), the ends (14, 15) of said strengthening structures being connected in a connection joint . The ends include corresponding connection surfaces, the one or more relevant dimensions of said surfaces being larger than the dimensions of the transverse surfaces of the strengthening structures at said ends. The one or more relevant dimensions of said connection joint are larger than that of the adjacent strengthening structure. The invention also relates to a wind turbine blade in which the at least two wind turbine blade sections include a number of substantially oblong carbon fiber strips and strips of one or further materials such as wood or glass fiber. The invention further relates to a wind turbine blade section, an assembly plant for assembling wind turbine blade sections (12, 13) and to a method and use of such wind turbine blades .