A method and system are provided for cooling a heat-exchanger in a wind turbine that has an electric generator with a cooling air flow directed therethrough. Effluent cooling air flow from the electric generator is directed into an air ejector pump and acts as motive air through the air ejector pump. Cold air is drawn into the air ejector pump by the vacuum generated by the motive air moving through the air ejector pump. The heat exchanger is disposed in-line with the cold air flow so that the cold air is drawn through the heat-exchanger, removes heat from the fluid circulated through the heat-exchanger, and becomes heated air that is combined with the motive air and discharged from the nacelle.

A wind turbine has a nacelle which houses operative components such as a transformer or converter which in use generate unwanted heat, the nacelle including an external nacelle cover (20) to form the outer nacelle enclosure, and provided with a panel (24) which overlies a bottom cover (22) region forming therewith a conduit for directing external air to one or more of the heat generating operative components for cooling purposes.

A wind turbine nacelle configured for mounting on a wind turbine tower and for supporting a rotor-supporting assembly, the nacelle comprising a main unit, and at least two auxiliary units. To increase flexibility and improve assembly and maintenance procedures of the wind turbine, the auxiliary unit comprises at least two auxiliary units each accommodating at least one wind turbine component, e.g. a converter or a transformer. The auxiliary units are attached individually to the same wall of the main unit, e.g. to a side wall or a rear wall.

Provided is a modular work platform including multiple modules for assembly about a tuned mass damper in a wind turbine, whereby the multiple modules are a first base platform, a second base platform, a first base connecting railing, and a second base connecting railing, whereby in an assembled state of the modular work platform, the modular work platform includes a platform opening for the tuned mass damper, wherein the platform opening is formed between the first base platform, the second base platform, the first base connecting railing and the second base connecting railing. A system including the modular work platform and a fixture for the tuned mass damper in the wind turbine, whereby the modular work platform is connected to the fixture is also provided.

A nacelle housing of a nacelle of a wind turbine is provided. The nacelle housing includes a ventilation opening of a cooling system of the wind turbine, a cover closing the ventilation opening, the cover being configured to allow an airflow through the cover and the ventilation opening, and a service hatch for hoisting a load into or out of the nacelle housing. The service hatch is provided by the ventilation opening and the cover, wherein the cover is configured as a service door of the service hatch that is opened to allow the hoisting of a load through the ventilation opening into or out of the nacelle housing. Furthermore, a method of hoisting a load into or out of a nacelle housing of a wind turbine is provided.

A nacelle for a wind turbine, the nacelle comprising: a drivetrain with a drivetrain axis, at least two torque arms positioned around the drivetrain axis and attached to a member of the drivetrain, and a frame attached to a yaw bearing. The torque arms of the drive train are supported by the frame and at least one of the torque arms has an orientation deviating at least substantially from being horizontal.

A mainframe mounts the drivetrain of a wind turbine, and to an arrangement comprising such a mainframe, and to a wind turbine having a corresponding arrangement. For the purpose of mounting the drivetrain of a wind turbine, the mainframe is realized with two bearing points that are spaced apart from each other, a partial flange, having a fastening region shaped as a circular ring segment, being provided at at least one bearing point. The arrangement comprises, besides the mainframe, at least one ring element configured to radially encompass the drivetrain. At least one ring element is fastened to the fastening region, shaped as a circular ring segment, of a bearing point of the mainframe. In the case of the wind turbine, the drivetrain is mounted by means of the described arrangement.

A gliding yaw bearing system for use in a wind turbine includes a first bearing assembly configured for being attached to a tower of the wind turbine, a second beating assembly configured for being attached to a nacelle of the wind turbine. An upwind section of the second bearing assembly is different from a downwind section of the second bearing assembly. A wind turbine utilizing the gliding yaw bearing system is also encompassed herein.

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.

The invention relates to a new type of tuned mass damper which is suitable in particular for damping oscillations of a low frequency, and can thus be used preferably as a construction damper when building or siting high, narrow structures, such as wind-turbine towers. The invention relates in particular to a pendulum oscillation damper having a first pendulum, to which the mass is attached, and a second pendulum, which is formed by a spring-like support device of a different design and is operated using a gas-air volume such that, with the aid thereof, the frequency of the oscillation system can be adapted and adjusted.