LM Wind Power A/S Patente

The present disclosure relates to a production line (5) for manufacturing a wind turbine blade (11). The production line (5) comprises a first workstation (61) configured for carrying out a post moulding manufacturing step on an assembled blade (10) when the assembled blade (10) passes along the first workstation (61) while being conveyed in a first direction (D1) that is substantially aligned with a longitudinal axis of the assembled blade (10). The first workstation (61) extends over a length in a direction that is substantially parallel to the first direction (D1). The length of the first workstation (61) is less than a longitudinal length of the assembled blade (10). The production line (5) also comprises a conveyor system (70) configured for conveying the assembled blade (10) in the first direction (D1). The present disclosure also relates to a method for carrying out a post moulding manufacturing step on an assembled wind turbine blade (10).

The present disclosure relates to a wind turbine blade comprising a leading-edge heating element extending along at least a portion of the leading edge of the wind turbine blade, the leading-edge heating element being configured for deicing a corresponding portion of an exterior surface of the leading edge; a first plurality of heating strips, each heating strip of the first plurality of heating strips extending in a substantially spanwise direction of the wind turbine blade, the first plurality of heating strips forming part of a first shell portion of the wind turbine blade, wherein the first shell portion is the pressure side shell portion or the suction side shell portion, the first plurality of heating strips being spaced apart from one another and from the leading-edge heating strip in a chordwise direction, each heating strip having a first end and a second end, the first end being closer to the tip end than the second end, each heating strip comprising carbon-fibre yarn and/or tow material; and a power source configured to provide electrical power to each of the first plurality of heating strips in order to generate heating in said each strip, said heating being generated by the carbon-fibre yarn and/or tow material. A method for manufacturing the wind turbine blade and a method of deicing such a wind turbine blade are also provided. Further, a heating strip is provided.

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A method of masking a mould (40) for moulding a wind turbine blade shell part (24, 26), the method comprising the steps of: arranging a masking device (50) in a mould (40) so that the masking device (50) covers the non-coating zone (46) of the mould surface (41), spraying a coating (70) onto a mould surface of the mould so that the coating is applied to a coating zone (44) of the mould surface (41) and prevented from being applied to a non-coating zone (46) of the mould surface (41) by the arrangement of the masking device (50), and removing the masking device (50) from the mould so that the non-coating zone (46) is exposed. The masking device (50) is configured so that, upon terminating spraying of the coating (70) at the first longitudinal boundary (45) of the coating zone (44), a lip portion (52) of the masking device (50) is separated from the coating (70) applied on the coating zone (44) by a gap (G).

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Leading edge protectors for a wind turbine blade are disclosed. The leading edge protectors are configured to at least partially cover a blade leading edge section. The leading edge protectors comprise a main body having a substantially constant thickness and having a trailing end. The leading edge protectors further comprise a plurality of irregularities arranged on an outer surface of the main body upstream from the trailing end and configured to energize a boundary layer. Wind turbines comprising such leading edge protectors are also disclosed.

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A method of manufacturing a wind turbine blade for a horizontal axis wind turbine (2), and mounting it to the pitch bearing of a hub of a wind turbine is described. The method comprises the steps of: manufacturing (402) a first wind turbine blade shell part; manufacturing (404) a second wind turbine blade shell part; assembling (406) at least the first wind turbine blade shell part and the second wind turbine blade shell part to form at least part of a shell body of the wind turbine blade, wherein the wind turbine blade extends between a root end and a tip end, and wherein the first wind turbine blade shell part and the second wind turbine blade shell part are at least adhered to each other along a first bond line that extends to the root end of the wind turbine blade; providing (408) a ring-shaped root end flange, which is configured to be connected to the root end of the shell body, and which is configured with a bond line marker, preferably on an inner circumference of the ring-shaped root end flange, and further configured with a pitch-angle marker; attaching (410) the ring-shaped root end flange to a root end face of the shell body, such that the ring-shaped root end flange covers the first bond line, and the bond line marker is aligned with the first bond line; and mounting (412) the wind turbine blade including the ring-shaped root end flange to the pitch bearing of the hub of the wind turbine, such that the pitch-angle marker is aligned with a zero-pitch position for the pitch bearing.

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The present disclosure relates to methods (40) and assemblies for installing a bushing (50) in a root (16) of a wind turbine blade (10). The present disclosure further relates to methods (40) and assemblies for replacing a bushing of a wind turbine blade (10). A method (40) comprises providing (41) a bushing hole (51); inserting (42) a bushing (50) wrapped in a reinforcement fabric (52) in the hole (51), the bushing (50) being closed at a tip end portion. The method (40) further comprises creating (43) vacuum in the hole (51), infusing (44) the reinforcement fabric (52) with resin, and curing the resin.

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A method for joining a first composite element (100) and a second composite element (200) of a wind turbine blade comprises positioning one edge joining portion (120) of the first composite element (100) to face one edge joining portion (220) of the second composite element (200). In addition, the method comprises plastic welding the one edge joining portion of the first composite element to the one edge joining portion of the second composite element. The edge joining portions (120, 220) are thermoplastic. Meanwhile, main portions (110, 210) of the first and second composite elements may be thermoplastic, or thermoset. In some cases, a shaped connector (160) containing thermoplastic and having the same shape as the void is between first and second composite elements (100, 200) when plastic welding them together. In some cases, the composite elements (100, 200) may comprise a core.

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A method of repairing a fiber composite element (100) having a locally deteriorated area (110), the method including forming a repair section (120) in the fiber composite element by removing material from the fiber composite element in a repair area comprising the locally deteriorated area, the formed repair section having a continuous repair surface (125), placing a pre-formed repair patch (130) in the repair section, the pre-formed repair patch having a first section with a contact surface (145), the contact surface being at least partly shaped corresponding to the shape of the repair surface, arranging the pre-formed repair patch to bring the contact surface into contact with the repair surface, and binding the pre-formed repair patch to the repair section.

In a first aspect, a tool for supporting a wind turbine blade in a post-moulding position is provided. The tool comprises a base configured to rest on a ground; a support structure configured to receive a region of the wind turbine blade when a leading edge of the wind turbine blade faces the ground, wherein the support structure comprises a supporting surface configured to receive and support an outer surface of the region of the blade; and a lifting mechanism configured to move the support structure relative to the base. In a further aspect, a supporting assembly for supporting a wind turbine blade in a post-moulding position is provided. In yet a further aspect, a method for supporting a wind turbine blade during post-moulding operations is provided.

This invention relates to a noise reducing device and a wind turbine blade comprises such a noise reducing device. The noise reducing device comprises noise reducing elements projecting from a base part towards a second end. Airflow modifying elements projects further from the base part towards a first end. The noise reducing elements and airflow modifying elements are arranged on opposite sides of the base part and preferably have different dimensions and/or shapes.

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