金刚石纳米颗粒对齿面接触刚度的影响研究

Effect of diamond nanoparticles on the contact stiffness of tooth surfaces

为探究金刚石纳米颗粒作为润滑添加剂时对齿面接触刚度的影响,基于Hertz接触理论,建立微凸体接触模型与混合润滑模型,求解纳米颗粒百分含量和齿轮转速变化时的齿面接触刚度。研究表明:纳米颗粒的适宜百分含量为10%~15%,此时可获得较为满意的齿面接触刚度。纳米颗粒相接触刚度和油膜刚度随齿轮转速的增加而不断减小,因而导致齿面接触刚度不断减小。

In order to explore the effect of diamond nanoparticles on the contact stiffness of tooth surfaces,based on the Hertz contact theory,a contact model of micro-convex body and a mixed lubrication model were established to solve the contact stiffness of tooth surfaces under different percentage content of nanoparticles and different rotating speed.The results show that the suitable percentage of nanoparticles is 10%~15%,and the relatively satisfactory contact stiffness of tooth surface can be obtained.The contact stiffness of nanoparticles and oil film stiffness decreased with the increment of rotating speed which led to the decrease of contact stiffness of tooth surfaces.