动力总成NVH分析中齿轮啮合特性研究

Gear meshing characteristics of powertrain NVH analysis

研究动力总成中部分齿轮的啮合特性,及其对NVH的影响,介绍了发动机启动电机传动齿轮和变速器齿轮的啮合特性。分析启动电机传动齿轮重合度,通过提高重合度,解决电机传动噪声问题和提高齿轮寿命,噪声试验表明,声品质有所改善;同时,研究了变速器齿轮的啮合动刚度,通过分析单对齿轮刚度和啮合线长度变化,快速得到随时间变化的齿轮啮合变刚度,并形成齿轮啮合动刚度计算标准方法,开发相应计算程序,大幅提高了工作效率,该方法的特点是计算简单、高效以及能得到随啮合转角变化的齿轮啮合刚度。

The gear meshing characteristics of some powertrain gears and its influence on vehicle NVH performance are studied.Starter gears and transmission gears are introduced.The starter gear overlap characteristics are analysed.The rattle noise from the starter is reduced and fatigue life is increased by enlarging gear meshing overlap.Dynamic meshing stiffness of the transmission gears is introduced and its standard calculation methods are derived.A program based on Romax and Matlab is developed and working efficiency is improved.