A shear web for a wind turbine blade includes a lower flange, an upper flange and a web structure extending between the lower and upper flanges, wherein at least one of the lower flange, upper flange, and the web structure includes an open lattice structure having a plurality of elongate fibrous composite spindles intersecting each other at multiple nodes of the structure. A method of making the shear web using a continuous fiber-reinforced additive manufacturing method is also disclosed.

A pitch controlled wind turbine comprising a tower, a nacelle mounted on the tower, a hub mounted rotatably on the nacelle, and at least three wind turbine blades is disclosed. Each wind turbine blade extends between a root end connected to the hub via a pitch mechanism, and a tip end. The wind turbine further comprises at least three blade connecting members, each blade connecting member extending between a connection point on one wind turbine blade and a connection point on a neighboring wind turbine blade, the connection points being arranged at a distance from the root end and at a distance from the tip end of the wind turbine blade. The wind turbine further comprises at least three pre-tension members, each pre-tension member being connected to one of the blade connecting members and to a hub part, the pre-tension members thereby providing pre-tension in the blade connecting members.

Provide is a rotor blade for a wind turbine, including a hollow blade body with a root and a tip, wherein the blade body is split along a split plane into two body parts, one extending from the root to a first connection section and the other extending from a second connection section to the tip, wherein the first and the second connection sections are adapted to overlap each other in the connected position.

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.

A fluid flow turbine blade assembly for a turbine rotor includes a blade and a deflector extending spanwise along at least a portion of the blade. At least a portion of an upstream surface of the deflector, along at least a portion of a span of the deflector, has a concave shape in a chordwise direction such that at least a portion of a chord line between leading and trailing edges of the deflector is disposed outside a profile defined between the upstream surface and a downstream surface of the deflector. The deflector has a substantially uniform thickness or a chord-wise varying thickness between the upstream surface and the downstream surface. The deflector alters fluid flow over the blade so as to increase the blade's contribution to global torque generated by the assembly so that, with the deflector's torque contribution, the global torque of the assembly is greater than the global torque that would be generated by the blade alone without the benefit of the deflector.

A segmented wind turbine rotor blade includes sleeve-shaped pressure pieces arranged between rotor blade segments, each of which is mounted on a connecting bolt. Each pressure piece includes one or more cylindrical sections and a tool engaging section for an assembly tool). Each pressure piece is connected to a corresponding connecting bolt in a form fit manner, so that a screwing force can be applied to the corresponding connecting bolt via the assembly tool via the pressure piece. A diameter of the cylindrical section(s) is less than a diameter of the tool engaging section. Each two adjacent pressure pieces are arranged rotated by 180 relative to one another.

According to the present invention there is provided a modular wind turbine blade comprising first and second blade modules connectable together to form at least part of the wind turbine blade, each blade module comprising an outer shell defining a pressure side and a suction side of the wind turbine blade. The first blade module comprises a first spar cap, and the second blade module comprising a second spar cap. The first spar cap has a tapered end portion in which the thickness of the first spar cap decreases towards the end of the first spar cap. The modular wind turbine blade further comprises an elongate connecting element for connecting the first and second blade modules together. The connecting element has a first tapered end portion in which the thickness of the connecting element decreases towards a first end of the connecting element. The first tapered end portion is configured for bonding to the tapered end portion of the first spar cap. The first spar cap has an inner surface and an outer surface, the thickness being defined between the inner surface and the outer surface. The first spar cap comprises (i) an intermediate thickness band; (ii) an inner thickness band between the intermediate thickness band and the inner surface; and (iii) an outer thickness band between the intermediate thickness band and the outer surface. Each of the thickness bands have a tapered end within the tapered end portion of the first spar cap. The connecting element has an inner surface and an outer surface, the thickness of the connecting element being defined between the inner surface and the outer surface. The connecting element comprises (i) an intermediate thickness band; (ii) an inner thickness band between the intermediate thickness band and the inner surface; and (iii) an outer thickness band between the intermediate thickness band and the outer surface. Each of the thickness bands has a tapered end within the first tapered end portion of the connecting element. The tapered end of the inner thickness band and/or the tapered end of the outer thickness band of the first spar cap has a lower rate of taper than the tapered end of the intermediate thickness band of the first spar cap. Additionally or alternatively, the tapered end of the inner thickness band and/or the tapered end of the outer thickness band of the connecting element has a lower rate of taper than the tapered end of the intermediate thickness band of the connecting element.

A pitch controlled wind turbine (1) comprising a tower (2), a nacelle (3) mounted on the tower (2), a hub (4) mounted rotatably on the nacelle (3), and at least three wind turbine blades (5) is disclosed. Each wind turbine blade (5) extends between a root end (6) connected to the hub (4), and a tip end (7). The wind turbine (1) further comprises at least three blade connecting members (8), each blade connecting member (8) extending between a connection point (9) on one wind turbine blade (5) and a connection point (9) on a neighbouring wind turbine blade (5). The wind turbine blades (5) each comprises an inboard blade part (5a) comprising the root end (6) and an outboard blade part (5b) comprising the tip end (7), the inboard blade part (5a) and the outboard blade part (5b) being connected to each other at a split position (10). The split position (10) is arranged between the root end (6) and the connection point (9).