基于鸟翼轮廓的沟槽型织构润滑性能分析

为减小车辆行星齿轮双向旋转轴向滑动支承磨损,将仿生学理念引入支承端面微织构的设计,将空气动力学优良的鸟翼结构抽象简化为抛物线槽,双抛物线三角形槽以及双抛物线梯形槽三种基本的槽型,建立基于质量守恒边界条件的空化效应数值模型,从而分析比较不同槽型的工况参数和结构参数对润滑特性的影响。研究结果表明基于仿生的这三种槽型中,双抛物线三角形槽的油膜承载力和摩擦系数最优,双抛物线梯形槽的润滑油流量和空化率最优,抛物线槽的的各项润滑性能没有太优异的也没有太差的,但其综合润滑性能在三者中最优。

Analysis of lubrication performance of groove texture based on bird wing outlines

In order to reduce the abrasion of the vehicle planetary gear bidirectional rotary axial sliding support,this paper introduces the bionics concept to the design of the micro texture on the supporting end face,and simplifies the fine aerodynamics of the bird wing structure to the parabolic groove,the double parabolic triangular groove and the double parabolic trapezoid groove. A numerical model of cavitation effect is established based on the boundary condition of mass conservation. The numerical model of the cavitation effect of the boundary conditions is established to analyze and compare the influence of the operating parameters and structural parameters of different groove types on the lubrication characteristics. The results show that the oil film bearing capacity and friction coefficient of the double parabolic triangular groove are the best in the three types of grooves based on bionic. The lubricating oil flow and cavitation rate of the double parabolic trapezoid groove are the best,and the lubrication performance of the parabolic groove is not too good or too poor,but the comprehensive lubrication performance is the best in the three.