Fretting instability characteristics for gear shaft shoulder
来源期刊：中南大学学报(英文版)2014年第10期
论文作者：JIA Guo-hai(贾国海) GONG Jin-ke(龚金科) E Jia-qiang(鄂加强) CAI Hao(蔡皓) WANG Shu-hui(王曙辉)
文章页码：3746 - 3752
Key words：gear shaft shoulder; torsional vibration; kinematics; fretting; friction instability damping ratio
Abstract: In order to solve fretting instability problem of gear shaft shoulder due to torsional vibration in mechanical system, the mathematical model of fretting instability vibration of gear shaft shoulder was established by adopting the method of combining kinematics and tribology, and the numerical analysis was applied to the fretting instability mechanism of gear shaft shoulder by introducing the friction instability damping ratio. The numerical results show that the main factors causing the unstable and vibrating gear shaft shoulder are the large tightening torque and too large static friction coefficient. The reasonable values of the static friction coefficient, the amount of interference and tightening torque can effectively mitigate the fretting instability phenomenon of gear shaft shoulder. The experimental results verify that damping plays a significant role in eliminating the vibration of gear shaft control system.
JIA Guo-hai(贾国海), GONG Jin-ke(龚金科), E Jia-qiang(鄂加强), CAI Hao(蔡皓), WANG Shu-hui(王曙辉)
(State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body
(Hunan University), Changsha 410082, China)
Abstract:In order to solve fretting instability problem of gear shaft shoulder due to torsional vibration in mechanical system, the mathematical model of fretting instability vibration of gear shaft shoulder was established by adopting the method of combining kinematics and tribology, and the numerical analysis was applied to the fretting instability mechanism of gear shaft shoulder by introducing the friction instability damping ratio. The numerical results show that the main factors causing the unstable and vibrating gear shaft shoulder are the large tightening torque and too large static friction coefficient. The reasonable values of the static friction coefficient, the amount of interference and tightening torque can effectively mitigate the fretting instability phenomenon of gear shaft shoulder. The experimental results verify that damping plays a significant role in eliminating the vibration of gear shaft control system.
Key words:gear shaft shoulder; torsional vibration; kinematics; fretting; friction instability damping ratio
