Coupling assembly and wind turbine comprising such assembly

A coupling assembly for fixedly connecting a rotational member to an end section of a hollow shaft, the hollow shaft having a rotational axis, and the end section having an inner shaft diameter and an outer shaft diameter, the coupling assembly comprising:

• a shrink ring,
• a coupling element,
• a plurality of first bolts, and
• a plurality of second bolts;
• wherein the shrink ring comprises:
• shrink ring end surface facing away from the rotational member when the coupling assembly is in use,
• shrink ring outer surface having an outer shrink ring diameter corresponding to the inner shaft diameter,
• shrink ring conical surface, and
• a plurality of through-going first bores arranged circumferentially and adapted to receive the first bolts, the first bores extending from the shrink ring end surface;
• and wherein the coupling element comprises:
• a first coupling element surface facing away from the rotational member when the coupling assembly is in use,
• a second coupling element surface facing towards the rotational member when the coupling assembly is in use,
• an annular groove arranged in the first coupling element surface, the annular groove comprising:
• an outer groove surface with a groove diameter corresponding to the outer shaft diameter,
• a groove conical surface matching the shrink ring conical surface, and
• a bottom surface,
• a plurality of through-going second bores arranged circumferentially and extending between the bottom surface of the groove and the second coupling element surface, and
• a plurality of first threaded holes extending at positions and orientations matching the plurality of first bores of the shrink ring when the coupling assembly is in use.