DRIVE TRAIN AND METHOD FOR WIND TURBINE WITH ELASTIC COUPLING

The invention relates to a drive drain for a wind turbine comprising: a rotor shaft (main shaft) configured to be driven by the rotor about a main axis; a support structure including a bearing housing surrounding the at least one bearing and supporting the rotor shaft for rotation about the main axis, thereby constraining other movements of the rotor shaft; a gearbox input shaft and a gearbox housing supporting the gearbox input shaft for rotation about the main axis while constraining other movements of the gearbox input shaft; and an elastic coupling, wherein the gearbox input shaft is coupled to the rotor shaft by the elastic coupling, the elastic coupling comprising a first coupling part rigidly connected with the rotor shaft, a second coupling part rigidly connected with the gearbox input shaft and elastic elements positioned between the first and the second coupling part, thereby constituting a single joint between the rotor shaft and the gearbox input shaft. The invention also relates to wind turbines comprising such a drive drain and methods of manufacturing or retrofitting wind turbines with such a drive drain.