Influence of Bolt Preload on Variable Pitch Bearing Strength of Wind Turbine
Variable pitch bearing is the core transmission component of wind turbine.In order to study the influence of bolt preload on its strength,a three-row roller slewing support of a wind turbine was taken as the research object,and a"hub-bearing-blade"model was established by finite element method.The beam element was used to simulate the bolt,the preload force was applied,and the nonlinear spring element was used to simulate the solid roller.The static simulation of variable pitch bearing is carried out.The distribution law of stress and displacement,contact load of rolling element and bolt strength of three-row roller slewing bearing ring under different bolt preloading conditions were compared.The results show that the stress in the oil groove of bearing ring decreases,the contact load of rolling body decreases,and the displacement of ring increases.Considering that the bearing capacity of the roller on the hub side is slightly larger than that on the blade side,the pre-tightening force of the inner ring bolt can be appropriately increased during the actual assembly process.
rolling bearingvariable pitch bearingthree-row roller slewing bearingwind turbinebolt preload
万方数据
维普
