基于MW级风力机齿轮啮合的有限元分析

随着风力机制造量级越来越大,传动扭矩增大,齿轮的设计越来越重要,否则齿轮很快出现疲劳点蚀导致损坏。运用有限元方法对MW级风力机齿轮进行参数化APDL精确建模,建立一对啮合齿轮模型,然后进行网格划分,生成有限元模型,计算齿轮啮合时的接触应力和弯曲应力。并和GB/T3480-1997接触应力理论公式比较,验证了有限元方法的正确性,同时得出齿轮接触应力分布和最大应力产生的部位及弯曲应力比接触应力小的多。从而为风力机齿轮的设计提供不同材质、不同型线的快速研究提供可能,同时为齿轮的设计提供依据。

Finite Element Analysis of Gears Meshing Based on MW Level Wind Turbine

With the growing of wind turbine manufacturing order of magnitude,the transmission torque increases,therefore,it is increasingly important for the gear design,otherwise the gear is soon damaged caused by fatigue pitting.Accurate modeling for a pair of gears of MW class wind turbine is built with the finite element method parametric APDL,and then a finite element model is generated after meshing to calculate the gear contact stress and bending stress in meshing.Afterwards the contact stress is verified by comparing with the contact stress theory formula of GB/T3480-1997,and we come to know that the gear contact stress distribution and the location where maximum stress occurs as well as the bending stress is much smaller than the contact stress.Thus it is possible to study the wind turbine gears of different materials,different profiles rapidly,and provide basis for the design of gear.