基于弹流润滑状态下的非圆齿轮啮合效率研究

Study on Meshing Efficiency of Non-circular Gear based on Elastohydrodynamic Lubrication

在分析非圆齿轮啮合特性及齿廓等啮合角分布规律的基础上,综合考虑相对速度、摩擦因数和油膜厚度等关键因子对啮合功率损失的影响规律,建立了弹流润滑状态下非圆齿轮传动啮合效率数学模型。以非圆齿轮节曲线波谷的轮齿齿顶进入啮合到从波峰的轮齿齿根退出啮合为啮合周期,通过计算啮合角变化下的滑动摩擦和滚动摩擦功率损耗,获得非圆齿轮传动的啮合效率。

Based on the analysis of the meshing characteristics of non-circular gear and the law of equal engagement angle of tooth profile,considering the influence of relative speed,friction coefficient,oil film thickness,and other key factors on the loss of meshing power,a novel mathematical model for the meshing efficiency of non-circular gear transmission under the elastohydrodynamic lubrication condition is established.By defining a meshing cycle as the period from the tooth top of pitch curve trough to the tooth root of pitch curve crest of noncircular gear,the meshing efficiency of noncircular gear drive is obtained by calculating the power loss of sliding friction and rolling friction under the change of meshing angle.