Electrically conductive shaft is one of the core components of wind turbine slip ring assembly, insulation resistance of the conductive shaft, electric strength and shaft rigid directly affects the corresponding specifications of entire wind power slip ring, thus affecting the reliability and stability of the entire wind turbine slip ring assembly. Currently, conventional conductive shaft main body by the shaft, conductive ring and insulation pads composed, adjacent two rings sheet an insulating spacer, applied wind power slip ring assembly, both the electric strength and insulation resistance are low, can not meet 3.0MW and above wind power slip ring of the corresponding technical requirements. When power 3.0MW and above wind power slip ring is running, since the insulating spacer ring piece diameter equal to the diameter of the insulating spacer, the insulating effect is not ideal, and therefore prone to arcing between the ring sheet of conductive shaft and damage the wind turbine slip ring assembly, reducing the reliability and longevity.

Cosmau provide a 3.0MW wind power slip ring, this series slip ring not only solved the arcing between adjacent ring sheet and improve the insulation resistance of the conductive shaft and the dielectric strength, but also improve the structure of the electrically conductive shaft rigidity, as well as wind its reliability and longevity. The conductive shaft of wind power slip ring by sub-line plate, shaft and lower plate, ring sheet, insulation pads, upper platen and bearing components composed, in the middle of the outer wall of the shaft set from left to right there under clips, ring sheet, insulation pads and the upper platen, adjacent rings sheet an insulating spacer ring, ring piece of lead, respectively from the points of line board thread through the hole, the outer wall of the shaft body vacuum infusion plastic insulation, the lower plate, ring sheet, insulation pads, upper platen are sealed.

Insulating washer diameter larger than the diameter of the ring piece 0.3 ~ 0.7mm, the outer wall of the insulating spacer formed with grooves. The groove width of the insulating gasket is 0.2mm, a depth of 0.1mm, by highlighting the height and groove design insulation pads, not only to solve the arcing between adjacent ring sheet and improve the insulation resistance of the conductive axis and dielectric strength, insulation resistance can reach 1000MQ / DC / 500V, dielectric strength up to 2000V / AC / 50HZ, but also improves the structural rigidity of the conductive shaft. The new wind power slip ring assembly life can be reached I million transfer to meet the requirements of more than 3.0MW wind power slip ring assembly.