基于MixedEHL啮合齿轮润滑特性研究

Research on Lubrication Characteristics of Meshing Gears Based on MixedEHL

为了改善和提高齿轮传动系统综合传动性能和疲劳寿命,以某直齿轮传动为研究对象,运用专业齿轮润滑仿真软件MixedEHL建立啮合齿轮混合润滑有限元仿真模型;对啮合齿轮油膜压力、油膜厚度分布、接触齿面平均粗糙度、接触刚度等啮合齿轮接触面的润滑特性进行仿真分析。仿真结果表明:啮合齿轮油膜压力呈现单波峰的形式,油膜厚度呈现双波峰的形式;在不同方向上,油膜压力和油膜厚度不同;接触齿面平均粗糙度较小,接触刚度呈现先增加再基本保持不变最后减小的趋势;该研究为直齿轮传动混合润滑特性、接触特性的改善提供理论依据。

In order to improve the overall transmission performance and fatigue life of the gear transmission system,a spur gear transmission has been taken as the research object,and the professional gear lubrication simulation software MixedEHL has been used to establish the finite element simulation model of the meshing gear mixed lubrication;the oil film pressure and oil film thickness distribution of the meshing gear,and the lubrication characteristics of the meshing gear contact surfaces such as the average roughness of the tooth surface and the contact stiffness have been simulated and analyzed.The simulation results show that the oil film pressure of the meshing gear is in the form of single peak,and the oil film thickness of the meshing gear is in the form of double peaks,the oil film pressure and oil film thickness are different in different directions;the average roughness of the contact tooth surface is small,and the contact stiffness shows the trend of first increased,then remains basically unchanged and final reduction;the research provides a theoretical basis for the improvement the mixed lubrication characteristics and the contact characteristics of the spur gear transmission.