RV减速器行星轮系齿形修形传动啮合性能分析

Meshing performance analysis of gear modification transmission of RV reducer planetary gear train

为准确掌握齿形修形对RV-150BX减速器行星轮系动态啮合性能及传动性能的影响,建立了行星轮系装配模型,通过有限元法分析了输入轴齿轮和行星轮在动态啮合中的传动规律,在啮合临界时刻最大和最小等效应力分别为14.47MPa和8.55MPa.经综合考虑,选取输入轴齿轮和行星轮齿顶修形量优化设计参数;通过动态啮合仿真,分析同等载荷下齿形修形后的传动性能.结果表明,在轮齿单、双齿交替啮合时刻,齿轮的速度、加速度波动最大并伴随冲击振动.经比较发现,齿形修形后速度、加速度波动明显改善,传动性能显著提高.

In order to accurately identify the influence of tooth profile modification on the dynamic meshing performance and transmission performance of the planetary gear train of the RV reducer,an assembly model of the planetary gear train was established,and the transmission law of the input shaft gear and the planetary gear in dynamic meshing was analyzed by the finite element method.The maximum equivalent stress and minimum equivalent stress at the critical moment of meshing were found to be 14.47 MPa and 8.55 MPa,respectively.After comprehensive consideration,the tooth tip modification amount of the input shaft gear and that of the planetary gear were selected as the design parameters to be optimized.With dynamic meshing simulation analysis,the transmission performance was calculated after the tooth profile modification under the same load.The analysis results showed that when the gear teeth alternately mesh with single and double teeth,the speed and acceleration fluctuations of the gear reach the maximum,accompanied by shock vibration.After comparison and analysis,it was found that,with tooth profile modification,the speed and acceleration fluctuations were significantly reduced,and the transmission performance was significantly improved.