Prediction of Contact and Lubrication Characteristics of Micro-textured Surface Under Thermal Line Contact EHL

Frontiers in Mechanical Engineering

Rupeng Zhu²  Zhengminqing Li²  Jiang Zhao²  Hong Zhang² 

[1] College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China;National Key Laboratory of Science and Technology on Helicopter Transmission, Nanjing University of Aeronautics and Astronautics, Nanjing, China;

关键词: micro-texture;    thermal EHL;    lubrication characteristics;    contact stress;    line contact;   

DOI  :  10.3389/fmech.2021.672588

来源: DOAJ

【 摘 要 】

In this study, a method combining numerical surface generation technology and three-dimensional hot-line contact EHL is employed to evaluate the contact characteristics of micro-textured surfaces under high-load line contact. Based on numerical simulation, the film thickness, film pressure, friction coefficient and surface flashing temperature of the virtual texture surface with different cross-sectional shapes and sizes are studied. On this basis, the subsurface stress at the contact point is calculated by the DC-FFT algorithm. The results show that, compared with a smooth surface, the micro-textures of different shapes all increase the average oil film thickness of the surface and reduce the friction coefficient, but at the same time lead to an increase in the contact stress of the surface. By changing the width and depth of the texture, the maximum film pressure has changed by 11.4 and 18.5%, respectively.

【 授权许可】

Unknown