齿轮泵气蚀引起的齿轮传动系统动态性能分析

Zhiwei Wang, Zehua Hu, Zhaoyang Tian, Siyu Chen
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引用次数: 0

摘要

在这项工作中,提出了一个考虑到啮合刚度和齿隙时变的动态模型,并搭建了一个试验台,以研究减速机泵中空转齿轮组的振动行为。根据数值和实验结果,分析了输入轴转速、扭矩波动和齿轮齿隙对减速机泵动态性能的影响。结果表明,当忽略扭矩波动时,驱动齿轮的动态传动误差由前三次啮合谐波分量主导;然而,振动加速度的有效值具有高频特性。当考虑扭矩波动时,单向齿轮泵的动态响应受扭矩波动的调制。齿隙对齿轮泵动态性能的影响有限,主要取决于扭矩波动条件。减速机泵的噪声主要来自啮合频率附近的低频成分。振动能量在频域内可分为两部分。在低频段,振动能量由机械振动引起。但在高频段,气蚀现象可能会导致振动能量的集中和泵结构的共振。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Dynamic performance analysis of a gear transmission system due to cavitation in gerotor pump
In this work, a dynamic model considering time-varying mesh stiffness and backlash was proposed and a test rig was built to investigate the vibration behavior of the idle gear set in a gerotor pump. The effects of input shaft speed, torque fluctuation, and gear tooth backlash on the dynamic performance of gerotor pump were analyzed according to the numerical and experimental results. Results demonstrate that when the torque fluctuation is neglected, the dynamic transmission error of drive gear is dominated by the first three mesh harmonic components; however, the RMS values of vibration acceleration have high frequency characteristics. When the torque fluctuation is considered, the dynamic responses of gerotor pump are modulated by the torque fluctuation. The effect of tooth backlash on the dynamic performance of gerotor pump is limited and mostly depended on the torque fluctuation condition. The gerotor pump noise is dominated by the low frequency component around the mesh frequency. The vibration energy can be divided into two parts in the frequency domain. In the low frequency band, the vibration energy is caused by the mechanical vibration. However, in the high frequency band, the cavitation phenomena may cause the concentration of the vibration energy and resonant of pump structure.
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