Aimed at collision contact of cages of planetary cylindrical roller bearings for wind turbine gearboxes,a rigid-flexible coupling dynamic model of cages is established.The effects of revolution speed of planetary gear,bearing rotational speed,radial load and guiding clearance on force between roller and cage pocket beam and force between cage and guiding surface of outer ring are analyzed.The results show that the increase of revolution speed and rotational speed leads to increase of force between roller and cage pocket beam and force between cage and guiding surface of outer ring,the revolution makes cage contact with guiding surface of outer ring for a long time,accelerating the wear of cage;with the increase of radial load,the force between roller and cage pocket beam and force between guiding surface of outer ring and cage tend to increase;with the increase of guiding clearance,the force between guiding surface of outer ring and cage gradually decreases,and the contact force between roller and cage pocket beam first decreases and then increases,there is an optimal guiding clearance to minimize the force between roller and cage pocket beam.
rolling bearingwind turbine bearingcylindrical roller bearingwind turbinescagecollisiondynamics
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