LM Wind Power A/S

A method ( 1000, 1001 ) of repairing a spar cap ( 51, 52, 53 ) of a wind turbine blade ( 10, 108 ) includes removing ( 1100, 1101 ) a damaged portion ( 531 d ) of a fiber-reinforced plastic part ( 530, 531 - 33 ) of the spar cap ( 51, 52, 53 ) thereby forming a recess ( 531 r ) adjacent to a non-damaged portion ( 531 n ) of the fiber-reinforced plastic part, the non-damaged portion ( 531 n ) comprising electrically conductive fibers at least substantially orientated in a first direction (F). A bottom wall and a sidewall of the recess ( 531 r ) is covered ( 1200, 1210, 1220 ) a with an insulating material ( 534 ). A fiber-reinforced plastic filling ( 535, 535 ′) is formed on the insulating material ( 534 ). The fiber-reinforced plastic filling ( 535, 535 ′) is covered with an electrically conductive material ( 536 ) in electrical connection with the non-damaged portion ( 531 n ).

The present disclosure relates to a method for manufacturing a blade segment for a segmented wind turbine blade, and a resulting segment for a segmented wind turbine blade as well as the segmented wind turbine blade. In particular, the blade segment comprises a female spar part defining an inner cavity and having a longitudinal inner end and an opposite longitudinal open end towards an end face of the blade segment, a first spar cap connected to an inner surface of a first shell portion and comprising a first primary spar cap portion. The blade segment further comprises a first secondary spar cap portion affixed to a first outer surface of the female spar part. The first secondary spar cap portion is glued to the inner surface of the first shell portion and/or to the first primary spar cap portion forming a glue interface between the first secondary spar cap portion and the inner surface of the first shell portion and/or the first primary spar cap portion.

A method of manufacturing a wind turbine blade ( 10 ) is provided, the method comprising the steps of providing a first shell half ( 38 ) and a second shell half ( 36 ), providing at least one shear web ( 50 ) having a web body ( 61 ) arranged between a first mounting flange ( 62 ) and an opposing second mounting flange ( 63 ), and providing a lifting assembly ( 65 ). The lifting assembly comprising at least one crane device ( 68 ), a lifting rail ( 69 ) suspended from the at least one crane device ( 68 ), and a plurality of lifting clamps ( 70, 72 ), each lifting clamp being connected to the lifting rail ( 69 ). The method further comprises the steps of attaching the lifting clamps ( 70, 72 ) to the shear web ( 50 ), lifting the shear web ( 50 ) with the lifting assembly ( 65 ), lowering the shear web ( 50 ) into the first shell half ( 38 ) with the lifting assembly ( 65 ), bonding the first mounting flange ( 62 ) of the shear web ( 50 ) to an inner surface ( 66 ) of the first shell half ( 38 ), detaching the lifting clamps ( 70, 72 ) from the shear web ( 50 ), bringing the first and second shell halves ( 38, 36 ) together, and bonding the second mounting flange ( 63 ) of the shear web to the second shell half ( 36 ).

The present invention provides a method for trimming a side portion of a pre-manufactured leading-edge protection element for a wind turbine blade. The element comprises a first side portion and a second side portion, the first side portion, when mounted to the wind turbine blade, extending from the leading edge and along a part of a pressure side of the wind turbine blade, and the second side portion, when mounted to the wind turbine blade, extending from the leading edge and along a part of a suction side of the wind turbine blade, or vice versa. The method comprises steps of: providing a support structure and a first cutting tool; arranging element on the support structure and fixating the element to the support structure, and cutting along a predetermined cutting path, whereby the leading-edge protection element is trimmed to a predetermined length. A corresponding system is also provided.

A method for manufacturing an article includes providing a plurality of flat sheets of fiber-reinforced polymer material. The method also includes forming the plurality of flat sheets of the fiber-reinforced polymer material into a plurality of curved sheets of the fiber-reinforced polymer material. Further, the method includes assembling the plurality of curved sheets of the fiber-reinforced polymer material in a tooling device to form an outer shape of the article. Moreover, the method includes securing each of the plurality of curved sheets of the fiber-reinforced polymer material together to form the article.

A method of assembling a wind turbine blade includes providing a load-bearing spar structure having one or more locating features for locating one or more wind turbine blade segments, the load-bearing spar structure being secured to a fixture, the fixture being moveable and extendable. The method also includes at least one of moving and extending the fixture so as to at least one of move and elevate the load-bearing spar structure through an assembly line. The method also includes positioning the one or more wind turbine blade segments onto the one or more locating features of the load-bearing spar structure as the fixture is at least one of moved and extended through the assembly line. The method also includes securing the one or more wind turbine blade segments to the load-bearing spar structure.

A flow-enhancing fabric extends in a longitudinal direction and in a transverse direction. The fabric includes a plurality of fibre layers including a first fibre layer and a second fibre layer arranged upon each other, the first fibre layer has a first plurality of fibre bundles oriented in parallel in a first fibre direction and has a plurality of first glass fibre bundles and a number of first carbon fibre bundles. The second fibre layer has a second plurality of fibre bundles oriented in parallel in a second fibre direction different from the first direction and has a plurality of second glass fibre bundles and a number of second carbon fibre bundles. At least a number of first carbon fibre bundles intersect and contact a number of second carbon fibre bundles. The fabric has a plurality of monofilaments arranged between the first and second fibre layer along the transverse direction.

A method for forming a structural tile for use in a composite panel includes providing a base plate of a compression mold assembly. The method also includes placing a grid structure mold of the compression mold assembly atop the base plate. The grid structure mold defines a cavity having a desired shape for a grid structure. Further, the method includes filling the cavity of the grid structure mold with a plurality of fragments of recycled fiber reinforced polymer material. Moreover, the method includes placing a cover plate of the compression mold assembly atop the grid structure mold to apply pressure to the grid structure mold. The method also includes applying heat to the cover plate to heat the plurality of fragments of recycled fiber reinforced polymer material such that the recycled fiber reinforced polymer material melts within the cavity. In addition, the method includes allowing the melted recycled fiber reinforced polymer material to cure to form the structural tile.

The present invention provides a to method for reinforcing a wind turbine blade, such as a root end. The root end comprises a first and a second bushing for attaching the wind turbine blade to a wind turbine hub, the bushings being located between an inner sidewall of the root end and an outer sidewall of the root end, the bushings being separated by retaining material, the method comprising forming a first injection channel in the retaining material; forming a first pressure release channel in the first retaining material, wherein the first pressure release channel is formed to be in fluid communication with the first injection channel in a region between the inner sidewall and the outer sidewall; and injecting adhesive material into the first injection channel at least until adhesive material enters the formed first pressure release channel. The invention also provides a wind turbine blade having a root end that has been reinforced using such a method. Further aspects are provided.

In a first aspect, a method for joining a first composite element and a second composite element of a wind turbine blade is provided. The method comprises positioning one edge joining portion of the first composite element to face one edge joining portion of the second composite element. 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. In a further aspect, a wind turbine blade comprising a first composite element joined to a second composite element according to any of the methods herein disclosed is provided.