A wind turbine blade (108) providing enhanced shear distortion resistance comprises a root end (118) and a tip end (116), a leading edge (112) and a trailing edge (114), and a suction side shell (122) and a pressure side shell (124) between which there is provided first and second shear webs (150, 152, 166, 168, 170, 172). The first and second shear webs (150, 152, 166, 168, 170, 172) are arranged in V-configuration in a chordwise cross section of the blade, whereby at least one of the first and second shear webs (150, 152, 166, 168, 170, 172) is non-orthogonal to the chord line (115), and the first and second shear webs are non-parallel. A method of manufacturing the wind turbine blade includes the step of providing respective upper and lower mould halves (200, 202) for the blade interconnecting the first and second shear webs (150, 152, 166, 168, 170, 172) by an elastic structure (190) biasing the shear webs towards one another before closing the mould.

A shear web mould system for manufacturing a wind turbine component in form of an I-shaped shear web having a web body and a first web foot flange at a first end of the web body and a second web foot flange at a second end of the web body is described. The system comprises a central moulding portion for forming at least a part of the web body, a first moulding plate for forming at least a part of the first web foot flange, and a second moulding plate for forming at least a part of the second web foot flange. The angles of the first moulding plate and the second moulding plate relative to the central moulding portion are adjustable.

The present invention relates to method of manufacturing a wind turbine blade, the method comprising the steps of providing a first shell half and a second shell half, providing a shear web having a first edge and an opposing second edge, and attaching the first edge of the shear web to an inner surface of the first shell half. One or more guide members are mounted onto an inner surface of the second shell half for guiding the shear web, each guide member comprising a hollow body and a guiding surface.

A root portion for a wind turbine blade is provided, including: an inner wall, an outer wall, a filler, an inner volume, mounting inserts, and a transversal holding arrangement, wherein the transversal holding arrangement includes at least one inlay beam extending from the inner wall and/or the outer wall into a mounting insert hole of at least one mounting insert for holding the mounting insert in the root portion during operation of the wind turbine blade, and wherein the mounting insert hole is a through hole and the at least one inlay beam extends from the inner wall through the mounting insert hole to the outer wall. A wind turbine blade with the root portion, a method of producing the root portion and a method for modifying a root portion is further provided.

There is provided a wind turbine blade having a root end, a tip end, a blade shell, a lightning protection system and an integrated web-down conductor. The integrated web-down conductor comprises: a down conductor forming part of the lightning protection system: electrical insulation surrounding the down conductor; and a web that surrounds the electrical insulation so as to enclose the down conductor and electrical insulation and is coupled to the blade shell.

A method of making a wind turbine blade shear web. The method comprises providing a shear web mould. The shear web mould has a longitudinally-extending main surface shaped to form a main panel of the shear web, and first and second longitudinally extending side surfaces shaped to form respective first and second flange portions of the shear web. The method further comprises arranging one or more layers of fibrous material against the main surface and against the first and second side surfaces of the mould to form a layup that is generally C-shaped in cross-section. The method further comprises arranging a pre-cured return flange on the layup, providing uncured resin to the fibrous material of the layup and between the layup and the pre-cured return flange, and curing the uncured resin to co-bond the pre-cured return flange and the C-shaped layup.

A wind turbine blade with shear distortion resistance includes a root end and a tip end, a leading edge and a trailing edge, and a suction side shell and a pressure side shell between which there are first and second shear webs. The first and second shear webs are arranged in a V-configuration in a chordwise cross section of the blade, whereby at least one of the first and second shear webs is non-orthogonal to the chord line, and the first and second shear webs are non-parallel. A method of manufacturing the wind turbine blade includes providing respective upper and lower mould halves for the blade and interconnecting the first and second shear webs by an elastic structure biasing the shear webs towards one another before closing the mould.

A root portion for a wind turbine blade is provided, including: an inner wall, an outer wall, a filler, an inner volume, mounting inserts, and a transversal holding arrangement, wherein the transversal holding arrangement includes at least one inlay beam extending from the inner wall and/or the outer wall into a mounting insert hole of at least one mounting insert for holding the mounting insert in the root portion during operation of the wind turbine blade, and wherein the mounting insert hole is a through hole and the at least one inlay beam extends from the inner wall through the mounting insert hole to the outer wall. A wind turbine blade with the root portion, a method of producing the root portion and a method for modifying a root portion is further provided.

A web (12) is produced by hand layup, resin transfer moulding or vacuum infusion. The web (12) comprises a waved profile (17) defining a plurality of crest and valleys, the stitching yarns (32) thereof may optionally be aligned with the direction of the crests. The web (12) comprises one or more integrated projecting flanges (26) defining a bonding surface for connection with the spar caps (11) of the wind turbine blade (5). This web saves weight and reduces costs. There is also a wind turbine blade (5) and a manufacturing method.

In a first aspect of the invention there is provided a bondline structure for bonding a shear web to a wind turbine blade shell. The bondline structure comprises an elongate inner core made from a deformable material, and one or more outer layers comprising reinforcing fibres at least partially surrounding the inner core. The inner core and/or the one or more outer layers comprise an adhesive.