Locking mechanism for a wind turbine

The Invention relates to a locking device for a wind turbine, wherein a rotor shaft of a drive train mounted on a machine frame the wind turbine is provided, and the rotor shaft having a rotor connectable. To perform maintenance on the wind turbine can, has the locking device locking means, in particular a sliding locking bolt on, thus a rotationally fixed connection between the rotor or the rotor shaft and the machine frame is produced by form-fitting. To is a rotational position of the rotor shaft in a desired position automatically detectable, and remain in reaching the desired position the locking means are automatically engageable. The apparatus comprises additionally at least one braking device for applying of the drivetrain, whereby the rotational speed of the rotor and the rotor shaft can be braked. It is an object of the invention, to provide an improved locking device, which inter alia the disadvantages of the prior art avoids. The object is according to the invention with the features of the main claim 1 solved by sensor means for detecting a rotational speed the rotor shaft are provided. This invention Device for the first time allows, by means of a comparison the instantaneous position of the rotor shaft with the target position, wherein Knowledge of the rotational speed, an estimate or Calculation on the ...