点蚀作用下变位行星齿轮系统动态特性研究

发布时间：2018-05-20 04:18

本文选题：点蚀 + 变位　；参考：《机械设计与制造》2017年11期

【摘要】：以某行星齿轮系统为研究对象,考虑实际工况下的齿轮安装变位特征,建立点蚀作用下故障齿面的啮合刚度有限元分析模型。分析不同点蚀位置、点蚀尺寸对行星变位齿轮啮合刚度影响,并以时变啮合刚度和传动误差作为综合输入激励,对行星齿轮系统进行动力学响应求解,研究点蚀特征对变位行星齿轮系统振动特性的影响。研究结果表明:点蚀显著降低啮合刚度,在啮合周期内,点蚀在齿根位置的啮合刚度变化最显著,且点蚀坑尺寸越大,啮合刚度减小越多;各点蚀区尺寸下的平均啮合刚度,都随正变位增大而减小,负变位增大而增大;点蚀对系统振动响应的影响主要表现为频谱上的故障频率及其倍频成分,且故障频率及其倍频的幅值随点蚀坑尺寸增加而增大,随正变位增大而增大,负变位增大而减小。此外,随着点蚀坑尺寸增大,Kurtosis值和RMS值均增大,但Kurtosis值对点蚀故障更灵敏。
[Abstract]:Taking a planetary gear system as an object of study, the finite element analysis model of meshing stiffness of the fault tooth surface under pitting corrosion is established by considering the gear mounting and modification characteristics under actual working conditions. The effect of pitting size on the meshing stiffness of planetary modified gear is analyzed in different pitting positions. The dynamic response of planetary gear system is solved by using time-varying meshing stiffness and transmission error as comprehensive input excitation. The effect of pitting characteristics on vibration characteristics of modified planetary gear system is studied. The results show that pitting obviously reduces the meshing stiffness, and the meshing stiffness of pitting at the root of the tooth is the most significant in the meshing cycle, and the larger the pitting pit size, the more the meshing stiffness decreases, and the mean meshing stiffness of each pitting zone is obtained. The effect of pitting on the vibration response of the system is mainly reflected in the frequency spectrum of the fault frequency and its frequency doubling component, and the amplitude of the fault frequency and the frequency doubling increases with the increase of the size of the pitting pit. With the increase of positive displacement, the negative displacement increases and decreases. In addition, both kurtosis and RMS values increase with the increase of pitting pit size, but Kurtosis values are more sensitive to pitting faults.
【作者单位】：重庆交通大学机电学院;重庆大学机械传动国家重点实验室;
【基金】：国家自然科学基金(51405048,51405043) 中国博士后科学基金(2016M590861) 长安大学公路养护装备国家工程实验室开放基金项目(310825161104)
【分类号】：TH132.425

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