4.2 Article

Optimization lubrication performance of journal bearings with microtexture

期刊

INDUSTRIAL LUBRICATION AND TRIBOLOGY
卷 74, 期 6, 页码 619-628

出版社

EMERALD GROUP PUBLISHING LTD
DOI: 10.1108/ILT-08-2021-0297

关键词

Texture shape; Texture arrangement; Reynolds equation; Lubrication performance; Friction and wear

资金

  1. Shandong Provincial Postdoctoral Innovation Foundation [201701016]
  2. Qingdao Postdoctoral Research

向作者/读者索取更多资源

This paper studies the influence of microtexture size, shape, and direction on lubrication performance, and proposes oil film thickness equations and wear calculation equations considering the microtexture. The research finds that appropriate microtexture shapes can effectively improve the lubrication performance of journal bearing and reduce the friction coefficient.
Purpose Researchers have not reached an agreement on which biomimetic shape has the best lubrication performance. This paper aims to study the influence of microtexture size, shape and direction on bearing capacity, end leakage, friction coefficient and wear of oil film. Design/methodology/approach Different oil film thickness equations considering the microtexture of bearing surface are gained. The two-dimensional finite difference equation and the calculation equation of wear are established. Findings The theoretical research shows that the wear value and the wear ratio when long side is perpendicular to the axial direction of the bearing are generally lower than when the long axis is parallel to the axial direction of bearing. The theoretical and experimental results show that the appropriate microtexture shape, such as circular dimple, crescent-shaped dimple, triangular dimple and fish-shaped dimple can improve effectively the lubrication performance of journal bearing and reduce the friction coefficient. Originality/value The research has great significance to reduce friction and improve the wear resistance of equipment.

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