Drive train between a rotor and gear unit of a wind power plant
A drive train between a rotor and a transmission having a torque support for a wind turbine generator system, including a rotor shaft extending from the rotor and supported in this area by a first rotor shaft bearing and extending to the transmission for converting the rotor speed into a desired generator speed, wherein the rotor shaft is supported by a second rotor shaft bearing formed in the manner of a moment bearing which is arranged on the input side within the transmission in order to receive the partial rotor forces, moments and weight forces and to directly pass them on to the torque support.
1. A drive train between a rotor and a transmission having a torque support for a wind turbine generator system, comprising a rotor shaft extending from the rotor and supported in this area by a first rotor shaft bearing and extending to the transmission for converting the rotor speed into a desired generator speed,
wherein said rotor shaft is supported by a second rotor shaft bearing formed in the manner of a moment bearing which is arranged on the input side within the transmission in order to receive the partial rotor forces, moments and weight forces and to pass them on to the torque support.
2. The drive train according to claim 1 ,
wherein means for elastic decoupling of a downstream transmission element of the transmission are arranged downstream of the second rotor shaft bearing as seen in the direction of the force flow.
3. The drive train according to claim 2 ,
wherein as a means for elastic decoupling a double-cardan coupling unit is provided.
4. The drive train according to claim 3 ,
wherein said double-cardan coupling unit is comprised of a gear on the input side having external toothing dome-shaped in the width and elevation dimension which is in mesh with an overlapping toothed sleeve having a corresponding internal toothing which is in mesh with a gear on the output side arranged axially spaced with respect to the gear on the input side and also having external toothing dome-shaped in the width and elevation dimension.
5. The drive train according to claim 2 ,
wherein, as a means for elastic decoupling, a flexible elastic membrane is provided which has its center connected to the rotor shaft and its periphery connected to the downstream transmission element of the transmission.
6. The drive train according to claim 3 , wherein the gear on the input side of the double-cardan coupling unit is fixed on the separate flange on the transmission input side by means of a bolt and stud connection, so that the second rotor shaft bearing arranged on the flange can be mounted from the side of the smaller diameter of the flange present on the inside of the transmission.
7. The drive train according to claim 6 , wherein the bearing backlash of the second rotor shaft bearing is adjustable by the bolt connection.
8. The drive train according to claim 1 ,
wherein the moment bearing is designed in the manner of a mutually angled, tapered roller bearing pair or in the manner of a triple cylinder roller bearing.
9. The drive train according to claim 1 ,
wherein a downstream transmission element of the transmission is part of a planet transmission stage on the input side.
10. The drive train according to claim 1 , wherein the first rotor shaft bearing is formed as a loose bearing.
11. The drive train according to claim 10 , wherein said loose bearing is constructed in the manner of a spherical roller bearing.
12. The drive train according to claim 1 , wherein said rotor shaft is connected with the transmission via a flange on the input side of the transmission, wherein the flange connection is formed as a bolt-stud connection.