Abstract
The thermal elasto-hydrodynamic lubrication characteristics of the internal meshing gears in a planetary gear train under vibrations were examined considering the influence of the modification coefficient and time-varying meshing stiffness. Based on dynamic theory of the gear system, a dynamic model of the planetary gear train was established. The lubrication performances of modified gear systems under vibrations and static loads were analyzed. Compared with other transmission types, the best lubrication effect could be produced by the positive transmission. A thicker lubricating oil film could be formed, and the friction coefficient and oil film flash temperature are the smallest. Increasing modification coefficient improves the lubrication performance continuously but intensifies the engage-in and tooth-change impact. For the planetary and inner gears, the increase in the modification coefficient also leads a decrease in the oil film stiffness.
摘要
摘要为探究动载荷作用下行星齿轮的热弹流润滑特性, 综合考虑变位系数和时变啮合刚度的影响, 基于动力学理论, 建立行星齿轮系统的动力学模型, 分析振动与静载荷作用下变位齿轮系统的热弹流 润滑特性。研究表明:与其它传动类型相比, 采用正传动时, 行星齿轮与内齿轮啮合时的润滑效果最 佳, 轮齿间可以形成较厚的润滑油膜, 轮齿间的摩擦系数、油膜的最高温升最小, 并且, 随着行星齿 轮与内齿轮变位系数的增大, 润滑状况不断得到改善, 热胶合承载能力增强;行星齿轮与内齿轮变位 系数的增加降低了其啮合刚度, 增大了啮入冲击和换齿冲击, 同时降低了油膜的刚度。
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The overarching research goals were developed by JIAN Guang-xiao and WANG You-qiang. JIAN Guang-xiao and WANG You-qiang put forward the research ideas. JIAN Guang-xiao, WANG You-qiang, ZHANG Ping, LI Yun-kai and LUO Heng established the models. JIAN Guang-xiao debugged the program, got the research data and accomplished the relevant analysis. The initial draft of the manuscript was written by JIAN Guang-xiao. All authors replied to reviewer’ comments and revised the final version.
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JIAN Guang-xiao, WANG You-qiang, ZHANG Ping, LI Yun-kai and LUO Heng declare that they have no conflict of interest.
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Projects(51575289, 51705270) supported by the National Natural Science Foundation of China
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Jian, Gx., Wang, Yq., Zhang, P. et al. Analysis of lubrication performance for internal meshing gear pair considering vibration. J. Cent. South Univ. 28, 126–139 (2021). https://doi.org/10.1007/s11771-021-4591-3
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DOI: https://doi.org/10.1007/s11771-021-4591-3
Key words
- internal meshing gears
- dynamic model
- modification coefficient
- lubrication performance
- oil film stiffness