A modular blade connection structure includes a first module, a second module and a structural adhesive module. The first module is provided on an end face thereof with a bonding flange extending into the second module; a gap between the butting surfaces of the first module and the second module is injected with a structural adhesive, which is extruded and cured to form a structural adhesive module; and the thickness of the first module at the starting end of the bonding flange extends towards the inner surface to form a first reinforcement, and the structural adhesive module extends inside the second module in a direction away from the bonding flange to form a second reinforcement. The present disclosure facilitates the control the bonding quality of the double-sided overlapping of the modular blade by means of the bonding flange and the improvement of the fatigue resistance at the assembling position.

Rotor blade for a wind power plant. The rotor blade includes a plurality of curved laminated wooden modules attached to each other, where each curved laminated wooden module includes a plurality of laminated veneer lumber boards. Each curved laminated wooden module is curved in at least one direction, where each laminated veneer lumber board includes a first set of veneer plies, where the first set of veneer plies includes a plurality of veneer plies and where the wood grain is directed in a first direction, and a second set of veneer plies, where the second set of veneer plies includes a single veneer ply or several veneer plies arranged adjacent each other and where the direction of wood grain differs from the first direction. Beneficially, the rotor blade including curved laminated wooden modules can be obtained in an easy and cost-effective way. The rotor blade is further environmental friendly.

A wind turbine comprising one or more wind turbine blades arranged to perform pivot movements between a minimum pivot angle and a maximum pivot angle, each wind turbine blade extending between an outer tip and an inner tip, wherein each wind turbine blade has an outer portion extending between the hinge and the outer tip and having a first length, and inner portion extending between the hinge and the inner tip and having a second length, wherein a coning angle of the blade carrying structure is larger than zero and/or a tilt angle of the rotor axis is larger than zero, and wherein a horizontal distance from the tower at a vertical position defined by a position of the hinge at tower passage to a point of connection between the blade carrying structure and the hub is equal to or less than the second length.

A wind turbine rotor blade is provided including a reinforcement element embedded in the body of the rotor blade and extending in a longitudinal direction of the rotor blade; a number of piezo-electric transducers arranged between the leading edge of the rotor blade and the reinforcement element; a number of piezo-electric transducers arranged between the reinforcement element and the trailing edge of the rotor blade; and a connector arrangement configured to apply an excitation signal to any one of the piezo-electric transducers, and to transmit a sensed signal from any one of the piezo-electric transducers to an evaluation module. A wind turbine including a number of such rotor blades and a method of measuring strain in a reinforcement element arranged in such a rotor blade is also provided.

A method for manufacturing a wind turbine blade, the method including the steps: a) positioning an outboard blade section at a predefined end position, the outboard blade section including an outboard end portion, b) positioning an inboard blade section adjacent to the outboard blade section, the inboard blade section including an inboard end portion, c) determining a deviation of a current position of the inboard end portion of the inboard blade section with respect to the outboard end portion the outboard blade section from a nominal position of the inboard end portion with respect to the outboard end portion, and d) moving the inboard blade section to the outboard blade section to compensate for the determined deviation. The complexity of the alignment procedure when aligning lengthwise blade sections are reduced and the accuracy of the alignment increased.

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 first blade portion having a shell that defines a suction side, a pressure side, a leading edge, and a trailing edge of the blade, the first blade portion further including a first blade portion end surface at one end of the first blade portion; a second blade portion having a shell that defines a suction side, a pressure side, a leading edge, and a trailing edge of the blade, the second blade portion further including a second blade portion end surface at one end of the second blade portion, wherein the first blade portion and the second blade portion are configured to be coupled together at the first and second blade portion end surfaces; and a connection joint for coupling the first and second blade portions together, wherein the connection joint includes: a first insert embedded in the first blade portion; a fitting integral with the first insert and projecting from the first blade portion end surface toward the second blade portion end surface; a second insert embedded in the second blade portion; and a fastener arranged to fasten the second insert to the fitting.

The present invention relates to a wind turbine blade (10) comprising a shell body with at least one pressure side shell member (36) and at least one suction side shell member (38), and a plurality of shear webs (70) arranged within the shell body. The plurality of shear webs (70) is successively arranged spanwise within the shell body such that adjacent shear webs overlap along part of their spanwise extent (L), wherein a gap (88) in the chordwise direction is provided between adjacent shear webs (70).

A method for assembling a rotor blade of a wind turbine: a) providing at least two different rotor blade modules that segment the rotor blade along a longitudinal direction thereof, wherein each rotor blade module has a sloped interface section that include a weldable thermoplastic resin and/or a weldable thermoset resin (M, b) providing a resistive element, c) arranging the rotor blade modules and the resistive element in such a way that sloped interface sections face each other and the resistive element is sandwiched between the sloped interface sections, d) energizing the resistive element to apply heat to a weldable thermoplastic resin and/or the weldable thermoset resin to melt or to soften it, and e) joining the sloped interface sections together at a joint by means of the molten or softened weldable thermoplastic resin and/or the weldable thermoset resin to form the rotor blade.

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.