摘要:
An arrangement and a method of rotating a hub of a wind turbine are provided. A wind turbine includes a hub mounted to a nacelle, whereby the hub is rotatable around an axis of rotation in respect to the nacelle. A rotor blade is arranged at the hub that leads to a torque around the axis of rotation of the hub. A counter weight is attached to the hub, whereby the counter weight has a mass that leads to a counter-torque around the axis of rotation. The counter-torque interacts with the torque during the installation of a second rotor blade to the hub. The counter weight is mounted to the hub by a mechanical arrangement that is rotatable in respect to the hub around the axis of rotation of the hub. The mechanical arrangement and the counter weight are rotatable in respect to the hub into a certain predetermined position.
摘要:
A generator, for example of a wind turbine, includes two end plates and a plurality of stator laminate plates arranged between the two end plates, is described. Each laminate plate and each end plate comprise a number of cooling holes which are located such that the cooling holes of the laminate plates and the cooling holes of the end plates are aligned with each other to form a number of cooling ducts by the stator material itself. Furthermore, a method for cooling a laminated stator of a generator is described having a cooling fluid guided via a tubing from a cooling fluid reservoir into at least one a partly open cooling duct in the laminated stator.
摘要:
Jacket structure for offshore constructions, particularly jacket structure for an offshore wind turbine is disclosed. The jacket structure includes a number of profiles in axial or angled alignment and a number of connecting members. A connection of the profiles and/or the connecting members is established by means of a bolted-connection.
摘要:
A thermal energy storage and recovery device is disclosed which includes a heat exchanger arrangement configured for guiding a flow of a heat transfer medium between a first end and a second end, and a heat storage material surrounding the heat exchanger arrangement so that a thermal interaction region is formed for thermally coupling the heat transfer medium with the heat storage material. The heat exchanger arrangement is sealed against the heat storage material so that, when in a first operational mode, in which the heat storage material is supposed to receive thermal energy from the heat transfer medium, a compressed gas is usable as the heat transfer medium for transferring thermal energy from the heat transfer medium to the heat storage material.
摘要:
A thermal energy storage and recovery device includes a heat exchanger arrangement for guiding a flow of a heat transfer medium between first and second ends thereof, and a heat storage material surrounding it, forming thermal interaction region between the heat transfer medium and the heat storage material. The heat exchanger arrangement transports the heat transfer medium from the first end to the second end when the heat storage material receives thermal energy from the heat transfer medium, and transports the heat transfer medium from the second end to the first end when the heat storage material releases thermal energy to the heat transfer medium. A controller operates the device such that that when storing or recovering thermal energy to or from the heat transfer medium within the device there exists a region where the inlet and outlet temperature of the heat transfer medium of this region is kept constant.
摘要:
A method for yaw control for a wind turbine comprising a rotor with a rotor blade, the rotor defining a rotor axis and a rotor plane to which the rotor axis is perpendicular, in which the rotor axis is turned to minimize the yaw angle between the ambient wind direction and the rotor axis is provided, wherein the turning of the rotor axis is performed based on the measurement of a wind speed in the rotor plane at the rotor blade. Furthermore, a wind turbine which comprises a rotor which includes a rotor axis and a rotor plane perpendicular to the rotor axis and an anemometer for measuring the ambient wind speed is provided. The wind turbine further comprises an anemometer which is located such at a rotor blade at a particular distance from the rotor axis as to allow for measuring a wind speed in the rotor plane.
摘要:
A jacket structure for supporting an offshore wind turbine a jacket assembly guide for assembling such a jacket structure and a method of assembling a jacket structure are described The jacket structure includes a plurality of legs, a plurality of connecting braces and a plurality of node elements arranged on the legs for connecting the braces to the legs. A node-to-leg connection is formed between each node element and a leg; and forming a brace-to-node connection between each brace and a node element. A node-to-leg connection and/or a brace-to-node connection include an adhesive joint.
摘要:
One or more bolt gauges each with a built-in load cell are positioned on a blade bolt or a bearing bolt between a pitch bearing and a tightening means and tensioned by the securing means at the inside or the outside of a hub of a wind turbine. The bolt gauge then outputs a signal descending both from the tension from the bolt/securing means connection and the tension from the blade when the blade is vibrated due to wind forces and the rotation of the blade when the hub of the wind turbine is rotating.
摘要:
A layered magnet for a magnet arrangement of an electrical machine includes a number of primary magnet layers and a number of subordinate magnet layers, wherein each magnet layer includes a ferromagnet with a layer concentration of a lanthanide, and wherein the layer concentration of the lanthanide is greatest in a primary magnet layer. Further, a method of manufacturing such a layered magnet and an electrical machine with a magnet arrangement are provided.
摘要:
A concrete tower is provided. The concrete tower may be a concrete tower for a wind turbine. The compressive strength of the concrete is changed in dependency of the height of the tower. The concrete tower includes a number of tendons that are arranged to pre-stress the concrete tower. Each tendon is anchored with the concrete tower at a first end of the tendon and at a second end of the tendon.