Operationally reliable bearing assembly for a pitch tube of a wind turbine

A drive train for a wind power plant, the drive train comprising:

• a rotor shaft connectable to a rotor of the wind power plant;
• an electric machine designed to operate in a generator mode and comprising a motor shaft;
• a transmission designed to connect the rotor shaft to the motor shaft in a torque-transmitting manner for conversion of a torque and a rotational speed;
• a pitch tube designed to penetrate the transmission in an axial direction;
• and
• a bearing assembly designed to support a pitch tube of the wind turbine in the transmission in an electrically insulated manner, said bearing assembly comprising a transmission shaft, a bearing cartridge designed to mount and seal the pitch tube with respect to the transmission shaft, a fastening flange forming part of the transmission shaft or the pitch tube for fastening the bearing cartridge in a non-rotational manner, an insulation element designed to electrically insulate the pitch tube with respect to the transmission shaft, a first fastening element designed to fasten the insulation element to the fastening flange, and a second fastening element designed to fasten the insulation element to the bearing cartridge.

A wind power plant for generating electrical power from wind energy, the wind power plant comprising:

• a rotor for providing a torque from the wind energy;
• a transmission coupled to the rotor for conversion of the torque;
• a generator for generating electrical power from the torque which is introduced by the transmission;
• and
• a pitch tube leading from the generator through the transmission as far as the rotor, and
• a bearing assembly designed to support the pitch tube in the transmission in an electrically insulated manner, said bearing assembly comprising a transmission shaft, a bearing cartridge designed to mount and seal the pitch tube with respect to the transmission shaft, a fastening flange forming part of the transmission shaft or the pitch tube for fastening the bearing cartridge in a non-rotational manner, an insulation element designed to electrically insulate the pitch tube with respect to the transmission shaft a first fastening element designed to fasten the insulation element to the fastening flange, and a second fastening element designed to fasten the insulation element to the bearing cartridge,
• wherein the rotor, the transmission and the generator are arranged coaxially with respect to one another.