航空学报 > 2025, Vol. 46 Issue (14): 231468-231468   doi: 10.7527/S1000-6893.2024.31468

固体力学与飞行器总体设计

大型航空行星轮系内齿圈柔性与疲劳可靠性

李铭1,2(), 万鑫1,2, 纪璞正1,2   

  1. 1.沈阳航空航天大学 机电工程学院,沈阳 110136
    2.飞行器快速试制技术研究教育部重点实验室,沈阳 110136
  • 收稿日期:2024-10-30 修回日期:2024-11-18 接受日期:2024-12-27 出版日期:2025-03-05 发布日期:2025-01-10
  • 通讯作者: 李铭 E-mail:liyoulu4166@163.com
  • 基金资助:
    国家自然科学基金(52005350);飞行器快速试制技术研究教育部重点实验室开放基金(纵20240224);辽宁省教育厅高等学校基本科研项目(LJKZ0196)

Influence of ring gear flexibility on fatigue reliability in large aerospace planetary mechanisms

Ming LI1,2(), Xin WAN1,2, Puzheng JI1,2   

  1. 1.School of Mechatronics Engineering,Shenyang Aerospace University,Shenyang 110136,China
    2.Key Laboratory of Rapid Development & Manufacturing Technology for Aircraft,Ministry of Education,Shenyang 110136,China
  • Received:2024-10-30 Revised:2024-11-18 Accepted:2024-12-27 Online:2025-03-05 Published:2025-01-10
  • Contact: Ming LI E-mail:liyoulu4166@163.com
  • Supported by:
    National Natural Science Foundation of China(52005350);The Foundation of Key Laboratory of Rapid Development & Manufacturing Technology for Aircraft (Shenyang Aerospace University), Ministry of Education(Zong 20240224);Basic Research Project of Higher Education Institutions, Liaoning Provincial Department of Education(LJKZ0196)

摘要:

内齿圈的轮缘柔性会显著影响行星传动在轮齿啮合层面和系统功率分流层面上的力学性能,是决定大型航空行星系统服役可靠性水平的关键设计因素之一。为了分析内齿圈的轮缘柔性对行星系统疲劳可靠性的影响方式及程度,在应力-强度干涉理论框架下,基于全概率公式计算原理构建了行星系统可靠性评估模型,并利用集中质量有限元法和轮齿概率寿命转化试验分别为可靠性模型提供载荷和强度输入变量。最终,建立了从轮缘厚度到行星系统可靠性指标的映射关系,准确地确定了在质量约束下可靠性增益效果最优的内齿圈轮缘厚度尺寸,为大型航空行星系统的疲劳可靠性设计提供了技术储备。

关键词: 行星齿轮传动, 内齿圈柔性, 疲劳可靠性, 有限元, 概率寿命转化

Abstract:

The flexibility of the ring gear significantly influences the mechanical properties of planetary transmission at both the tooth meshing level and the system power split level, making it one of the most important design factors determining the service reliability of large aerospace planetary mechanisms. To analyze the way and extent to which the rim flexibility of the ring gear affects the fatigue reliability of the planetary system, a planetary system reliability assessment model is developed using the stress-strength interference theory and the full probability formula calculation. The model incorporates load and strength input variables obtained through the lumped mass finite element method and probabilistic life transformation test of the gear teeth. Finally, the mapping relationship between rim thickness and the reliability index of the planetary system is established, and the thickness range of the ring gear rim with the best reliability gain effect under the mass constraint is accurately determined. This study provides a technical reserve for the fatigue reliability design of large aviation planetary systems.

Key words: planetary gear transmission, ring gear flexibility, fatigue reliability, finite element, probability lifespan conversion

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