In a first aspect of the invention there is provided a wind turbine blade comprising a blade shell that extends in a spanwise direction from a root end to a tip end, and in a chordwise direction from a leading edge to a trailing edge. The blade shell comprises a spar cap formed from a plurality of substantially planar strips of reinforcing material, the strips being arranged in a plurality of stacks extending longitudinally in the spanwise direction and arranged side-by-side in the chordwise direction. In each stack an uppermost strip defines an upper surface of the stack, a lowermost strip defines a lower surface of the stack, and longitudinal edges of the stacked strips define side surfaces of the stack. The blade further comprises a retaining clip comprising a plurality of side-by-side substantially U-shaped sections. The U-shaped sections each comprise a pair of mutually-spaced side portions defining a stack-receiving region therebetween, and the side portions are joined by a bridging portion. At least some of the stacks are located in the stack-receiving regions of the retaining clip, such that the side portions of the U-shaped sections abut side surfaces of the stacks. Each U-shaped section of the retaining clip is inverted with respect to its neighbouring U-shaped section(s) such that the bridging portions of the respective U-shaped sections extend alternately across the upper and lower surfaces of the stacks in the chordwise direction.

A wind turbine blade comprising a plurality of spar components extending along the longitudinal axis and providing the main bending stiffness of the wind turbine blade a major principal axis defining a structural pitch angle of at least 1? with respect to a chord line, and including: one or more suction-side spar caps each having a centre line; one or more pressure-side spar caps each having a centre line; and one or more shear webs distributed around a central shear web line and at least one of which being connected to first spar caps, wherein at least one suction-side spar cap centre lines is arranged with a first chordwise distance to the central shear web line, and at least one pressure-side spar cap centre lines is arranged with a second, different, chordwise distance to the central shear web line.

Structures and methods for joining misaligned or dissimilar width spar caps are disclosed as having a connecting structure in a rotor blade assembly for a wind turbine, wherein a first blade segment defines a first joint end, the first blade segment having at least one spar cap. A second blade segment defines a forward end coupled to the first blade segment, the second blade segment having at least one spar cap offset from the spar cap of the adjoining first blade segment. At least one connecting structure is coupled between the adjoining spar caps of the first blade segment and the second blade segment, the connecting structure having a plurality of sequentially stacked plies configured for parallel fiber alignment with the adjoining spar caps and cross-sectional area continuity with the adjoining spar caps.

The present invention relates to a pre-manufactured spar cap for a wind turbine blade comprising a spar cap structure comprising a plurality of fibre-reinforced composite elements arranged in stacked rows and separated by interlayers and a first and/or second damage tolerant cover sheet. The first and/or second damage tolerant cover sheets each comprises a first damage tolerant fibre layer and a second damage tolerant fibre layer attached to each other in attachment areas, wherein the attachments areas are separated from each other by a distance between 1-5 cm. Furthermore, the spar cap structure and the first and/or second damager tolerant cover sheet are embedded in a first cured resin. The present invention also relates to a damage tolerant cover sheet as such, as well as a wind turbine comprising a first and/or second damage tolerant cover sheet. Also, the present invention relates to methods of manufacturing a premanufactured spar cap, a wind turbine shell member and a wind turbine blade comprising the first and/or second damage tolerant cover sheet.

A wind turbine blade comprising a blade body, at least three electrically conductive elements comprising conductive material, said conductive elements optionally comprising at least one lightning conductor, at least one spar cap, and at least one heating arrangement, and a potential control arrangement, wherein the at least three conductive elements have longitudinal axes that are essentially codirectional with a longitudinal axis of the blade body. The potential control arrangement comprises a plurality of coupling devices, each of which coupling at least two of said conductive elements, each coupling device and being positioned at predetermined locations with respect to a blade axis being a longitudinal axis of the blade body.

The present disclosure provides a blade for a wind turbine, where the blade extends in a lengthwise direction between a root end and a tip end of the blade. The blade comprises a leeward shell portion and a windward shell portion, each of the shell portions defining respective inner and outer surfaces extending in a chordwise direction between a leading edge of the blade and a trailing edge of the blade. The blade further comprises a first windward reinforcement structure, a first leeward reinforcement structure, a second windward reinforcement structure, and a second leeward reinforcement structure, the reinforcement structures being arranged internally within the blade and extending in the lengthwise direction of the blade. The second windward and second leeward reinforcement structures are arranged closer to the trailing edge than the first windward reinforcement structure and the first leeward reinforcement structure, respectively, and the second windward reinforcement structure is longer than the second leeward reinforcement structure in the lengthwise direction.

In a first aspect of the invention there is provided a wind turbine blade comprising a shell and a shear web connected between a windward inner surface of the shell and a leeward inner surface of the shell. The shear web comprises an elongate web panel and a load-bearing flange extending transversely from a first side of the web panel to connect the shear web to the windward or leeward inner surface of the shell. The blade further comprises at least one non-structural flange extending transversely from a second side of the web panel. The non-structural flange has a substantially planar adhesive-receiving portion arranged in opposed relation to the windward or leeward inner surface of the shell. The load-bearing flange and the non-structural flange are formed of different materials.

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 segmented blade module structure and a molding method thereof are disclosed. The blade module includes a blade shell, a beam and a web provided in the blade shell, and the beam comprises a connecting beam, a trailing edge beam and an auxiliary beam plate, and a connecting structure is provided at an end of the connecting beam. The beam and the web integrally formed of composite materials constitute a bearing frame that forms a contour shape conforming to the blade, and the blade shell is formed by a skin wrapped on the bearing frame. The auxiliary beam plate is arranged corresponding to the area from the middle portion to the trailing edge portion of the blade shell to ensure that there is sufficient contact area between the beam and the blade shell to avoid instability of the blade shell, ensuring the structural stability of the segmented blade module.

The present invention relates to a modular wind turbine blade and connection structure thereof. The blade module includes a shell and a load-bearing beam and a bearing web provided therein. The load-bearing beam comprises a connecting beam, an auxiliary beam plate, a trailing edge beam, and a T-shaped beam. The connecting beam is provided on both sides of the middle portion, the trailing edge beam is embedded at the edge of the trailing edge portion, the auxiliary beam plate is provided in a plurality along the circumferential direction of the blade, and the T-shaped beam is connected to two adjacent auxiliary beam plates respectively. The load-bearing beam is fitted with the shell, and a support frame formed by the load-bearing beam in conjunction with the bearing web conforms to the contour shape of the blade.