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Three-dimensional mixed lubrication analysis of spur gears with machined roughness

机译：采用加工粗糙度的正齿轮三维混合润滑分析

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摘要

The timing gears of the ship internal combustion engine usually undergo dynamic loading conditions, and often work in a mixed lubrication state. In this study, by considering the three-dimensional (3D) machined roughness, an integrated model with the analysis of mixed lubrication state and dynamic-meshing performance for the spur gear is developed. The model is verified by comparing its results with the predictions using the typical line contact EHL formulas. The machined roughness apparently affects the local 3D distributions of the film pressure and thickness. The shaved surfaces have the minimum film thickness ratio and the worst lubrication state, while the polished surfaces can improve the lubrication performance of the timing gear pairs greatly. Under the conditions of heavy-load and low-speed, almost all of the Hertzian contact zone appears to be in contact with 0 film thickness, and the local maximum pressure may lead to serious stress concentration, film breakdown, and excessive wear, etc. By optimizing the gear module and pressure angle, the loading capacity of the timing gear is promoted and the contact area gets reduced, the lubrication state improves significantly from mixed lubrication to full film lubrication.
机译：船舶内燃机的定时齿轮通常经过动态负载条件，并且经常在混合润滑状态下工作。在本研究中，通过考虑三维（3D）加工粗糙度，开发了一种集成模型，其分析了混合润滑状态和用于齿轮的动态啮合性能。通过使用典型线路触点EHL公式将其结果与预测进行比较来验证该模型。加工粗糙度显然影响薄膜压力和厚度的局部3D分布。剃刮表面具有最小膜厚比和最差的润滑状态，而抛光表面可以大大提高定时齿轮对的润滑性能。在重载和低速条件下，几乎所有的赫兹接触区域似乎与0膜厚度接触，局部最大压力可能导致严重的应力浓度，薄膜击穿和过度磨损等。通过优化齿轮模块和压力角，促进定时齿轮的装载能力，并且接触面积降低，润滑状态显着地从混合润滑到全膜润滑。

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  • 来源
    《Tribology International》 |2019年第2019期|共10页
  • 作者

    Shi Xiujiang; Sun Wen; Lu Xiqun; Ma Xuan; Zhu Dong; Zhao Bin; He Tao;

  • 作者单位

    Harbin Engn Univ Coll Power &

    Energy Engn Harbin 150001 Heilongjiang Peoples R China;

    Harbin Engn Univ Coll Power &

    Energy Engn Harbin 150001 Heilongjiang Peoples R China;

    Harbin Engn Univ Coll Power &

    Energy Engn Harbin 150001 Heilongjiang Peoples R China;

    Harbin Engn Univ Coll Power &

    Energy Engn Harbin 150001 Heilongjiang Peoples R China;

    Harbin Engn Univ Coll Power &

    Energy Engn Harbin 150001 Heilongjiang Peoples R China;

    Harbin Engn Univ Coll Power &

    Energy Engn Harbin 150001 Heilongjiang Peoples R China;

    Northwestern Univ Dept Mech Engn Evanston IL 60208 USA;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 机械摩擦、磨损与润滑;
  • 关键词

    Gears; Surface roughness; Gear dynamic performance; Mixed lubrication;

    机译：齿轮;表面粗糙度;齿轮动态性能;混合润滑;

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