Torque transmission system for a slip ring unit of a wind turbine and method of assembly of a slip ring unit

A method of assembling a slip ring unit in a wind turbine, the slip ring unit having an encoder, the method comprising:

• connecting a static part of the slip ring unit to a static component of the wind turbine;
• and
• connecting a rotating part of the slip ring unit to a rotating component of the wind turbine;
• wherein connecting the rotating part of the slip ring unit to the rotating component of the wind turbine comprises connecting via a torque transmission system such that a degree of freedom is provided in at least one of an axial direction or in a radial direction, while preventing relative displacement between the rotating part of the slip ring unit and the rotating component of the wind turbine in a tangential direction.

A wind turbine, comprising:

• a tower;
• a nacelle mounted atop the tower;
• a rotor comprising a rotatable hub and at least one rotor blade mounted to the rotatable hub;
• a slip ring unit configured for being mounted along a rotational axis of the rotor, the slip ring comprising an encoder, a rotating part configured for connection to a rotating component of the wind turbine, and a static part configured for connection to a static component of the wind turbine,
• a torque transmission system configured for connecting the rotating part of the slip ring unit to the rotating component of the wind turbine and having a degree of freedom in at least one of an axial direction or a radial direction, and
• wherein the torque transmission system is further configured to prevent relative displacement between the rotating part of the slip ring unit and the rotating component of the wind turbine in a tangential direction.