含齿面剥落缺陷影响的共轴对转轮系振动特性分析

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摘要针对某型无人直升机共轴对转主减齿轮箱设计，采用集中参数法建立该齿轮箱中多级斜齿轮传动系统二十五自由度动力学模型，模型中考虑了时变啮合刚度、轴承支承刚度、传动轴扭转刚度以及啮合误差的影响。分析了输入转速和高速级齿轮齿面剥落缺陷尺度、位置对传动系统动态特性的影响规律。研究表明，上下旋翼轴齿轮副动态啮合力波动较大，上旋翼轴齿轮副动态啮合力波动幅度是下旋翼齿轮副的1.7倍；随着转速增大，各级齿轮副动态响应中的二倍输入级啮合频率的幅值提升最显著；当高速级齿轮齿面出现剥落缺陷，啮合频率附近会出现边频带，振动冲击随着缺陷尺寸的增大而增大；在不同的缺陷位置中，位于双齿啮合区与三齿啮合区交界位置，缺陷产生的振动冲击幅值最大。研究结论为无人直升机共轴对转主减齿轮箱的减振降噪，故障诊断提供了理论参考。
关键词：共轴对转；齿轮传动；集中参数法；剥落缺陷；动力学

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	杜正柱1
	许立新1
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	牛坤3

关键词 ：共轴对转, 齿轮传动, 集中参数法, 剥落缺陷, 动力学

Abstract：Aiming at the design of a coaxial counter-rotating main reduction gearbox for a certain type of unmanned helicopter, a 25-degree-of-freedom dynamic model of the multi-stage helical gear transmission system in the gearbox was established by using the lumped parameter method. The effects of time-varying meshing stiffness, bearing support stiffness, torsional stiffness of the transmission shaft, and meshing error were considered. The influence laws of the input speed and the size and position of tooth surface spalling defect located at the high speed stage gear on the dynamic characteristics of the system was analyzed. The results showed that the dynamic meshing force of the upper and lower rotor shaft gear pairs fluctuate greatly and the degree of dynamic meshing force fluctuation of the upper rotor shaft gear pair is 1.7 times that of the lower rotor gear pair. As the speed raise, the amplitude of the double input stage meshing frequency in the dynamic response of the gear pairs at all levels have the most significant increased. When the high-speed gear tooth surface has a spalling defect, the sidebands will appear near the meshing frequency, and the vibration impact will increase with the increase of the defect size. Among the different defect positions, it is located at the junction of the double-tooth meshing area and the three-tooth meshing area where the vibration shock peak value is the largest. The conclusions provide theoretical references for the vibration reduction and noise reduction of the unmanned helicopter coaxial contra-rotating main reduction gearbox and the fault diagnosis.
Key words: coaxial contra-rotating; gear transmission; lumped parameter method; spalling defect; dynamics

Key words： coaxial contra-rotating gear transmission lumped parameter method spalling defect dynamics

收稿日期: 2021-10-12 出版日期: 2022-10-15

引用本文:

杜正柱1，许立新1,2，牛坤3. 含齿面剥落缺陷影响的共轴对转轮系振动特性分析[J]. 振动与冲击, 2022, 41(19): 254-265.
DU Zhengzhu1, XU Lixin1,2, NIU Kun3. Vibration characteristics analysis of coaxial contra-rotating gear train with tooth surface spalling defects. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(19): 254-265.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2022/V41/I19/254

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