A multirotor wind turbine (1) comprising a tower (2), a yaw arrangement (6) and at least two energy generating units (4) is disclosed. The yaw arrangement (6) is carried by the tower (2) and comprises an outer wall (7) being rotationally suspended about the tower (2). Each energy generating unit (4) is carried by an arm (3) extending from the outer wall (7). The multirotor wind turbine (1) further comprises a load management system (14, 30, 31, 32, 33, 34, 36) for hoisting articles (15, 26) from the tower bottom to each energy generating unit (4) via the yaw arrangement (6).

System (1) for craneless blade (6) mounting and dismounting at wind turbines (2), wherein the system (1) at least comprises a blade tip beam (9) to be fixed at the blade (6) and a blade supporting structure (15) to be connected with and to guide and secure the blade tip beam (9) while the supporting structure (15) is displaced in a substantially horizontal direction, whereby total control of the blade (6) when moved from vertical position towards horizontal position and until the blade (6) is safe on a cradle or support (15) or opposite during mounting is achieved.

A method for anchoring a sling of a rope for supporting loads, in a wind turbine, the wind turbine includes at least two components connected via a bolt-and-nut arrangement includes multiple pairs of bolts and nuts at opposing flanges, the nuts fastening to the bolts at the upper flange, wherein at least one adapter includes a cylindrical outer holding surface for receiving the sling is placed atop of at least one nut covering its edges, and the sling is fastened to the adapter is provided.

Described is a tool and apparatus for positioning a blade for a wind turbine the wind turbine including a tower and a rotatable hub on the tower. The tool is mounted on a side of the tower so that the blade is supported on the tower in an initial configuration. The tool includes a first part arranged to be angularly movable relative to a second part for tilting the blade with respect to the tower to position the blade in a position that can allow the blade to be connected to the hub.

A wind turbine nacelle platform structure including a beam assembly with at least two beams arranged to extend from a front region of a nacelle outward beyond the back end of the nacelle and a platform assembly mounted to the underside of the outward extending portion of the beam assembly. The disclosed further describes a wind turbine including a nacelle mounted on top of a tower, and such a nacelle platform structure secured to the nacelle.

The disclosure relates to hoisting accessories for wind turbines. The hoisting accessory is configured to be rotatably attached to the rotor hub and is further configured to assume a hoisting configuration and a passive configuration, wherein in the hoisting configuration, a wind turbine blade can be hoisted and mounted substantially vertically to the rotor hub, and wherein in the passive configuration, the rotor hub carrying one or more wind turbine blades can be rotated. The present disclosure also relates to kits including such hoisting accessories and methods of hoisting wind turbine blades.

The present invention provides a method of erecting a wind turbine on a wind turbine site. The wind turbine comprises a turbine tower and a nacelle. The method comprises the following steps: providing a plurality of tower sections being arrangeable upon each other in a vertical orientation in a tower structure to form the turbine tower, providing at least two damper units configured to dampen oscillations of the turbine tower, attaching one of the at least two damper units to one of the plurality of the tower sections on an outside thereof, and subsequently arranging said tower section in the tower structure, attaching a subsequent one of the at least two damper units to another one of the plurality of the tower sections on an outside thereof, and subsequently arranging said tower section in the tower structure, while the previous one of the at least two damper units is still attached to the previous one of the plurality of tower sections.

A rotor lock assembly for locking a rotor of a wind turbine. The rotor lock assembly has at least one relocatable rotor lock. The relocatable rotor lock has a housing, a bushing element, a pin shaft position within the bushing element, and a locking mechanism. The housing includes a mounting portion adapted for mounting to a bearing housing adjacent to a rotor lock plate of the rotor.

An assembly and method are provided for preventing exposure of personnel to an opening defined by a surface of a wind turbine. Accordingly, a hatch assembly is arranged adjacent to the opening. The hatch assembly includes a frame structure and a support structure. The frame structure includes a plurality of frame members arranged together to at least partially surrounded opening the plurality of frame members further define a passageway for receiving the support surface. The support surface is slidable between a first position and a second position. The support surface occludes the opening defined by the surface of the wind turbine when the support surface is in the first position and occludes the passageway defined by the plurality frame members when in the second position so as to prevent exposure of personnel to the opening.

A kinetic modular machine for producing electricity from flows, either mono or bi-directional, moving at different speeds, includes one or more turbines that are “open center” and coaxial; a floating/positioning system; and a connection between the kinetic modular machine and a docking. Each turbine has a rotor, a stator, and a synchronous generator. In different configurations, the turbines are structurally, mechanically and electrically independent. The floating/positioning system includes a floater, a wing, and a fixture linking the turbines to the floater, implementing the control of the rotational axes (roll, pitch, yaw), with the wing keeping the machine at a given distance from the shore and the fluid surface. The modular design, having independent turbines, allows for a flexible design, keeping the installation and maintenance costs low.