具有不同辐板布置斜齿轮传动系统的动态特性研究

Dynamic Behaviour of a Helical Gear Transmission System

研究了齿轮结构参数对齿轮传动系统动态特性的影响．用三维有限元计算了航空齿轮常用的三种辐板支承形式和不同轮缘与轮辐尺寸下齿轮副的啮合刚度波动，用Ｆｏｕｒｉｅｒ级数法讨论了齿轮结构参数对其传动系统固有频率及动载荷的影响，以及附加阻尼的作用．发现了薄轮缘及薄轮辐斜齿轮传动系统的振动规律，这将有利于航空高速齿轮等强度结构动态设计方法的建立．

To the authors' best knowledge, there is as yet no published paper on the interaction between vibrations of gear system and gear structure.In this paper the authors discuss the effeCt of variations in parameters and damping of gear structure on vibration of belieal gear system.In Figs. 3 and 5 the of effect of variations in geometry of gear web on vibration of gear system is presented. For example, when thickness of web is decreased from half tooth width to one eighth of tooth width, the dynamic load (acting on web) factor is reduced from 1.6 to 1.1, but peak dynamic load (acting on gear tooth due to gear web torsional vibration) factor is increased from 1. 15 to 1.28.In Figs.7 and 8,the of Toot of web damping on vibration of gear system is I)rcsentcd. It can be easily seen that increase of web damping can reduce remarkably the peak dynamic loads acting on the gear web and gear teeth respectively due to web vibration.Finally,the authors present a research result that appears to be contrary to what is generally believed. The authors find that gear structure patameters-types of web arrangement, damping of web,dimensions of gear rim and web-have little of Toot on dynamic loads acting on gear tooth. This is because the gear system is excited through gear teeth.