考虑偏载啮合的齿轮系统接触分析及其啮合刚度求解

Contact Analysis of Gear System Considering Mesh Misalignment and Its Meshing Rigidity Solution

齿轮运转过程中发生偏载是引起齿轮转子系统异常振动的原因之一,有限元法能够较为准确地模拟齿轮偏载啮合过程,进而通过接触面应力状态分析其偏载带来的影响。为了研究偏载对于齿轮啮合接触力及其齿轮啮合刚度的影响,基于SolidWorks参数曲线方程建模,联合运用Hypermesh和AnsysWorkbench对模型有限元仿真,得到了不同偏载角度下啮合齿轮接触面应力分布及其时变啮合刚度变化曲线。结果表明,齿轮偏载作用下,接触形态随偏载角度加大更多地偏向于角接触,接触面积逐步减小;接触应力集中,接触应力最大值与均值在不同偏载状态下数值不同,整体逐渐增大;实际啮合刚度与理论啮合刚度曲线基本吻合,有限元法更贴合实际;接触刚度随偏载角度增加,整体刚度曲线升高。

Misalignment occurring during gear operation is one of the causes of abnormal vibration of gear rotor system.The finite element method can accurately simulate the meshing process of gear with misalignment,and then the influence of misalignment through the stress state of contact surface is analyzed.In order to study the influence of misalignment on the gear meshing contact force and gear meshing stiffness,this paper based on Solid Works parametric curve equation modeling,is combined with Hyper mesh and AnsysWorkbench to simulate the model by finite element method.The stress distribution of the contact surface of the meshing gear and the variation curve of the meshing stiffness under different misalignment angles were obtained.The results show that the contact morphology tends to angular contact more with the increase of misalignment Angle,and the contact area decreases gradually.The contact stress is concentrated,and the maximum value of the contact stress is different from the mean value under different misalignment conditions,and the whole contact stress increases gradually.The actual meshing stiffness curve is basically consistent with the theoretical meshing stiffness curve,and the finite element method is more consistent with the actual meshing stiffness curve.The overall stiffness curve increases with the increase of misalignment Angle.