EPICYCLIC GEAR STAGE FOR A WIND TURBINE GEARBOX, A WIND TURBINE GEARBOX AND A WIND TURBINE

摘要

The invention relates to an epicyclic gear stage for a wind turbine gearbox comprising a sun gear, at least two planet gears, engaged with said sun gear, an annulus gear, a first planet carrier flange connected to one side of at least two of said planet gears, and a second planet carrier flange connected to the other side of least two of said planet gears. Torque from the wind turbine rotor is transferred via a torque transfer part connected to at least one of said first and second planet carrier flanges at one or more torque transferring zones and said one or more torque transferring zones are located between a first and a second plane, said planes being substantially perpendicular to an axis of rotation of the sun gear. Furthermore the first plane is flush with an inner side of the first planet carrier at a position where the gear shaft is carried by the first planet carrier, and the second plane is flush with an inner side of the second planet carrier at a position where the gear shaft is carried by the second planet carrier. The invention further relates to a wind turbine gearbox and a wind turbine.