Effect of meshing-induced deformation on lubrication for journal planet gear bearings

IF 7.1 1区工程技术 Q1 ENGINEERING, MECHANICAL International Journal of Mechanical Sciences Pub Date : 2024-09-25 DOI:10.1016/j.ijmecsci.2024.109747

Jiayu Gong , Kun Liu , Fanming Meng , Hongxia Wang , Haoxun Xu

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Abstract

To increase the power density and reliability of wind turbine gearboxes (WTGs), journal planet gear bearings (JPGBs) are increasingly employed in their low-speed planet stages. Except for the pressure- and temperature-induced deformations, the JPGB is also structurally deformed by the gear pair meshing in this application, complicating the lubrication and deformation characteristics. Considering the above meshing-induced deformation, a thermo-elasto-hydrodynamic (TEHD) model is proposed for the JPGB, whose deformation is predicted using a self-programmed procedure based on the finite element method (FEM). Besides, this model is verified through a lubrication experiment of the JPGB in the WTG. It is found that the appropriate meshing-induced deformation, varying periodically in the meshing process, can improve the TEHD and misalignment behaviors of the JPGB due to the load-carrying region expansion or twice hydrodynamic action. This phenomenon becomes increasingly obvious with increasing the WTG's input power and the planet's inner radius.

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啮合引起的变形对轴颈行星齿轮轴承润滑的影响

为了提高风力涡轮机齿轮箱（WTG）的功率密度和可靠性，越来越多的低速行星级采用了轴颈行星齿轮轴承（JPGB）。在这种应用中，除了压力和温度引起的变形外，JPGB 还会因齿轮对啮合而产生结构变形，从而使润滑和变形特性变得复杂。考虑到上述啮合引起的变形，提出了 JPGB 的热-弹性-流体动力学（TEHD）模型，并使用基于有限元法（FEM）的自编程程序对其变形进行了预测。此外，还通过风电机组中 JPGB 的润滑实验对该模型进行了验证。研究发现，适当的网格诱导变形在网格划分过程中周期性变化，可以改善 JPGB 因承载区域膨胀或两次流体动力作用而产生的 TEHD 和错位行为。这种现象随着风电机组输入功率和行星内半径的增加而变得越来越明显。

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来源期刊

International Journal of Mechanical Sciences 工程技术-工程：机械

CiteScore

12.80

自引率

17.80%

发文量

769

审稿时长

19 days

期刊介绍： The International Journal of Mechanical Sciences (IJMS) serves as a global platform for the publication and dissemination of original research that contributes to a deeper scientific understanding of the fundamental disciplines within mechanical, civil, and material engineering. The primary focus of IJMS is to showcase innovative and ground-breaking work that utilizes analytical and computational modeling techniques, such as Finite Element Method (FEM), Boundary Element Method (BEM), and mesh-free methods, among others. These modeling methods are applied to diverse fields including rigid-body mechanics (e.g., dynamics, vibration, stability), structural mechanics, metal forming, advanced materials (e.g., metals, composites, cellular, smart) behavior and applications, impact mechanics, strain localization, and other nonlinear effects (e.g., large deflections, plasticity, fracture). Additionally, IJMS covers the realms of fluid mechanics (both external and internal flows), tribology, thermodynamics, and materials processing. These subjects collectively form the core of the journal's content. In summary, IJMS provides a prestigious platform for researchers to present their original contributions, shedding light on analytical and computational modeling methods in various areas of mechanical engineering, as well as exploring the behavior and application of advanced materials, fluid mechanics, thermodynamics, and materials processing.