【摘要】 基于接触动力学相关理论和齿轮传动物理模型,提出齿轮传动啮合接触冲击概念,研究齿轮啮合传动时由啮合点处速度差异导致的轮齿接触冲击现象,建立齿轮啮合接触冲击模型,给出啮合接触冲击求解算法,分析不同冲击转速、冲击位置对冲击合力、冲击时间和冲击应力的影响,并利用解析计算式对比计算各个冲击位置和冲击速度条件下的最大冲击力,验证数值计算结果的有效性。研究表明:冲击转速和冲击位置对冲击合力、冲击时间以及冲击应力均产生较大影响。同时还给出不同冲击条件下齿面上最大接触应力点在整个冲击接触过程的分布,为接触疲劳和疲劳累积的深入研究提供参考,计算结果表明最大接触应力点集中在齿宽中部附近区域,并且受冲击速度的影响很小。更多还原

【Abstract】 A new concept of impact in gear meshing based on contact dynamics and physical model of gear drive is put forward.The phenomenon of contact/impact between the meshing tooth pair caused by the velocity difference at the meshing point is studied.The model of contact-impact of gear meshing is built,and the solution algorithm is given.The influences of different impact velocity and impact position on the resultant impact force,impact time and impact stress are analyzed,and the maximal impact forces at each impact position and each impact velocity are calculated and compared by using the analytical calculation equation,so as to verify the validity of the numerical calculation result.The research shows that both impact velocity and impact position have significant influences on the resultant impact force,impact time and impact stress.Besides,the distributions of the maximal stress points on the tooth surface during the impact process under different impact conditions are also given,thus providing reference for in-depth research of contact fatigue and accumulated fatigue.The calculation result shows that the maximal contact stress points concentrate in the nearby area of the middle of tooth breadth.更多还原