Drive device for wind turbine

Abstract

Drive device for a wind mill comprising a large pulley (21) disposed on a main shaft (22) and at least one belt (27) or chain adapted to transfer rotation from the pulley (21) to a generator (30, 31). The pulley (21) is rotationally coupled to at least two secondary shafts (23, 24), which are disposed parallel to the main shaft (22). One or more belts (27), which transfer the rotation, extend over the pulley (21) and the secondary shafts (23, 24). The secondary shafts (23, 24) are in turn rotationally coupled to at least one, preferably two, electric generators (30, 31).

Description

technical field

[0001] The invention relates to a transmission for a wind turbine (wind turbine) according to the preamble of claim 1 attached hereto. Background technique

[0002] In most current wind turbines the drive unit is placed in the nacelle which also carries the wind turbine rotor. The nacelle must be arranged on top of a tall mast and rotated so that the rotor is always facing the wind.

[0003] This placement of the drive unit results in a significant weight on top of the mast and makes access for maintenance difficult. However it is at this location of the transmission unit and the generator which is widely used as a replacement, that the rotational torque has to be transmitted through the mast via the shaft, which causes losses and requires the mast to be able to absorb the reaction torque from the rotating shaft. Contents of the invention

[0004] Therefore, there is an urgent need to simplify and make the transmission unit lighter. There is also a need ...

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