斜齿轮振动噪声分析方法

齿轮啮合传动的不平稳是产生振动噪声的主要原因,需要对齿轮啮合传递的动态过程及其规律进行研究。首先,以自动变速器中一对常啮合斜齿轮为研究对象,分别采用有限元法和切片理论计算斜齿轮的传递误差,用以衡量斜齿轮啮合传动的平稳性。然后,根据齿轮修形的经验公式,确定斜齿轮修形参数的范围。基于切片理论,采用列举法,以降低传递误差波动、改善齿面载荷分布为优化目标,确定最优修形方案。最后,通过分析自动变速器的振动噪声台架实验测试结果,有效地验证了笔者采用的方法及模型的可行性。

Research on the Noise and Vibration of the Helical Gear

Since the main cause of vibration and noise during transmission is unsteady gear meshing, it is necessary to examine its dynamic process and laws. This paper adopts the finite element method and slice theory to study a pair of helical gears in an automotive transmission (AT) and calculate its transmission error (TE), in order to evaluate the steadiness level of the transmission process. An effective way to reduce noise and vibration is gear modification; based on the empirical equations of gear modification, the micro-geometric size range was first decided. In order to determine the optimal method for gear tooth modification, the enumeration method was applied to the targets of transmission error reduction and load distribution improvement on the tooth surface, based on thin slice theory. The analysis results of the bench test of the AT showed the validity and effectiveness of the proposed method and model.