Study on the effect of bearing position and stiffness on the dynamic behavior of output stage of CHT system based on the cylindrical gear meshing

IF 1.8 4区工程技术 Q3 ENGINEERING, MECHANICAL

Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science Pub Date : 2024-07-23 DOI:10.1177/09544062241259609

Xiaoyu Che, Rupeng Zhu

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引用次数: 0

Abstract

The internal and external rotor shafts are important components to transfer power in coaxial helicopters, and bearing supports could affect the dynamic behavior of the transmission system. In order to explore the influence of bearing support structure, bearing position and support stiffness on the dynamic behavior of the output stage of coaxial helicopter transmission (CHT) system based on the cylindrical gear meshing, a rigid-flexible coupled dynamic model is established under cantilever-cantilever support structure and cantilever-simple support structure considering the flexibility of rotor shaft based on Timoshenko beam theory, and time-varying mesh stiffness (TVMS), comprehensive meshing error are also considered. Newmark-beta numerical method was applied to calculate the dynamic response. The result indicates that the load sharing performance of gear pair using cantilever-simple support structure is better than that of cantilever-cantilever structure, but the maximum vibration displacement of bull gears is reduced apparently. Simultaneously, the bearing positions and stiffness can be adjusted to achieve better performance in load distribution and maximum vibration displacement of bull gears.

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研究轴承位置和刚度对基于圆柱齿轮啮合的 CHT 系统输出级动态行为的影响

内外转子轴是同轴直升机动力传输的重要部件，轴承支撑会影响传动系统的动态特性。为了探讨轴承支撑结构、轴承位置和支撑刚度对基于圆柱齿轮啮合的同轴直升机传动（CHT）系统输出级动态行为的影响，基于季莫申科梁理论建立了考虑转子轴柔性的悬臂-悬臂支撑结构和悬臂-简支撑结构下的刚柔耦合动态模型，并考虑了时变啮合刚度（TVMS）和综合啮合误差。采用 Newmark-beta 数值方法计算动态响应。结果表明，采用悬臂-简支结构的齿轮副的负载分担性能优于悬臂-悬臂结构，但牛齿轮的最大振动位移明显减小。同时，可通过调整支承位置和刚度来实现更好的负载分配性能和公牛齿轮的最大振动位移。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 工程技术-工程：机械

CiteScore

3.80

自引率

10.00%

发文量

625

审稿时长

4.3 months

期刊介绍： The Journal of Mechanical Engineering Science advances the understanding of both the fundamentals of engineering science and its application to the solution of challenges and problems in engineering.