A bearing arrangement for a wind turbine includes a bearing and a bearing housing. The bearing housing defines an interior space wherein the bearing is arranged. The bearing housing includes a drain opening for draining lubricant from the interior space. A chamber includes a fluidic connection with the drain opening and a damping space is formed inside the chamber to throttle a lubricant flow out of the interior space.

A wind turbine nacelle including an outer cover defining an interior volume within which is housed a powertrain assembly comprising: a gearbox including an input shaft and an output shaft which are aligned on a common rotational axis, an electrical power generator connected to the output shaft of the gearbox. The power generator includes a generator cabinet that encloses, in an internal chamber, a stator at a radially outward position and a rotor in a radially inward position, the rotor being rotatable about the common rotational axis. The rotor comprises: a cylindrical field structure coupled to a rotor support frame; a gearbox connection flange that couples to the gearbox output shaft by a first fixing array; wherein the generator cabinet is provided with an opening that permits maintenance personal to gain access fully inside the internal chamber, and wherein the internal chamber is configured to allow maintenance personnel to access at least the first fixing array that couples the gearbox output shaft to the gearbox connection flange from a position fully inside the internal chamber.

A base for supporting a portable crane for handling components of a wind turbine is described. The base is mountable on the wind turbine, and configured to be switched between a first configuration and a second configuration. In the first configuration the base is configured for being supported by a main bearing of the wind turbine to allow the portable crane to lift a gearbox of the wind turbine. In the second configuration the base is configured for being supported by a bed plate of a nacelle of the wind turbine to allow the portable crane to lift the main bearing. The base is configured for supporting the portable crane while switching between the first configuration and the second configuration. A method for removing a main bearing of a wind turbine is also disclosed.

The invention relates to a wind turbine nacelle (2) configured for mounting on a wind turbine tower (3) and housing a rotor-supporting assembly supporting a rotor, the nacelle further housing a power conversion assembly, the nacelle comprising: a main unit (20, 101) arranged to be connected to the wind turbine tower (3) and housing the rotor-supporting assembly, and at least one auxiliary unit (21, 22, 102) housing an operative component (34, 35, 104) forming part of the power conversion assembly, wherein the main unit (20, 101) and the auxiliary unit (21, 22, 102) are separate units configured to be connected by a unit fixation structure at an interface, and wherein the at least one auxiliary unit has a first height in an assembled configuration and a second height in a transportation configuration, the first height being higher than the second height.

A wind turbine nacelle including an outer cover defining an interior volume within which is housed a powertrain assembly comprising: a gearbox including an input shaft and an output shaft which are aligned on a common rotational axis, an electrical power generator connected to the output shaft of the gearbox. The power generator includes a generator cabinet that encloses, in an internal chamber, a stator at a radially outward position and a rotor in a radially inward position, the rotor being rotatable about the common rotational axis. The rotor comprises: a cylindrical field structure coupled to a rotor support frame; a gearbox connection flange that couples to the gearbox output shaft by a first fixing array; wherein the generator cabinet is provided with an opening that permits maintenance personal to gain access fully inside the internal chamber, and wherein the internal chamber is configured to allow maintenance personnel to access at least the first fixing array that couples the gearbox output shaft to the gearbox connection flange from a position fully inside the internal chamber.

Wind turbine, comprising a bedframe (2) having a cylindrical frame connection flange (11) and shaft (3) having a cylindrical shaft connection flange (16), wherein the shaft connection flange (16) is fixated to the frame connection flange (11) by screw connections arranged in axially extending bores provided in the frame connection flange (11) and the shaft connection flange (15), wherein the frame connection flange (11) is provided with a first row (Ia) of first through bores arranged at an outer first frame radius and the shaft connection flange (16) is provided with a first row (Ib) of first threaded blind bores (21) arranged at an outer first shaft radius which corresponds to the first outer frame radius, the frame connection flange (11) is provided with a second row (IIa) of second threaded blind bores (26) arranged at an intermediate second frame radius and the shaft connection flange (16) is provided with a second row (IIb) of second through bores (27) arranged at an intermediate second shaft radius which corresponds to the intermediate second frame radius, the frame connection flange (11) is provided with a third row (IIIa) of third threaded blind bores (31) arranged at an inner third frame radius and the shaft connection flange (16) is provided with a third row (IIIb) of third through bores (32) arranged at an inner third shaft radius which corresponds to the inner third frame radius, wherein a through bore is flush with a threaded bore and a screw connection (22, 28, 33) extends through the through bore and is screwed into the threaded blind bore.

A nacelle for a wind turbine includes a nacelle roof and a first wind turbine component, wherein the nacelle roof is configured to cover the first wind turbine component, the nacelle roof including a first sliding section and a second sliding section, wherein the first sliding section and/or the second sliding section is configured to slide over at least a part of the surface of the nacelle roof, wherein the first sliding section and the second sliding section are moveable between a closed position, in which the first wind turbine component is covered by the nacelle roof, and an opened position, resulting in an opening of the nacelle roof through which the first wind turbine component is hoisted.

A wind turbine comprising, a tower, a nacelle mounted on the tower, and a rotor for harvesting wind energy by rotation of the rotor about a rotor axis extending in a vertical center plane. The nacelle comprises a main unit and two auxiliary units each housing a first and a second operative component. To obtain a combination of reuse of components and a good weight distribution, the first operative components in the first and second auxiliary units have the same distance to the center plane and the second operative components in the first and second auxiliary units have different distances to the center plane.

An arrangement for fixing a housing of a wind turbine gearbox in a nacelle, including a housing-fixing means, a nacelle-fixing means, and at least two spring devices. The spring devices support the housing-fixing means against the nacelle-fixing means in opposite directions along a support axis. The spring devices are arranged on different sides of a plane extending parallel to an axis of rotation of an input shaft of the wind turbine gearbox.

A wind turbine nacelle includes a rotor generator shaft, a rotor connected to the rotor generator shaft, an array of permanent magnets mounted on a circular outer surface of the rotor, a rotor hub directly connected to a forward end of the rotor generator shaft, a plurality of circumferentially spaced blades mounted on the rotor hub to face upwind, a stator ring surrounding the rotor, a plurality of encased coils mounted on an inner surface of the stator ring facing and radially spaced from the array of permanent magnets, a rear chassis attached to a rear surface of the stator ring and having a rear bearing housing, a rear bearing mounted in the rear bearing housing, a forward chassis attached to a front surface of the stator ring and having a front bearing housing, and a front bearing mounted in the front bearing housing.