混合弹流润滑下内啮合直齿轮动态特性磨损退化研究  

A study on wear degradation of internal spur gear under hybrid elastohydrodynamic lubrication

作　　者：宁志远 陈长征[1] NING Zhiyuan;CHEN Changzheng(School of Mechanical Engineering,Shenyang University of Technology,Shenyang 110870,China)

机构地区：[1]沈阳工业大学机械工程学院,沈阳110870

出　　处：《振动与冲击》2021年第16期183-191,共9页Journal of Vibration and Shock

基　　金：国家自然科学基金(51675350);辽宁省博士启动基金(20170520111)。

摘　　要：针对现有磨损计算方法难以求解混合弹流润滑下内啮合齿轮磨损的问题,提出了黏着磨损与弹流润滑耦合的计算模型。根据弹流润滑理论计算油膜刚度,并将油膜刚度、齿面接触刚度以及承载系数结合构建了混合弹流润滑条件下的综合刚度模型以完善动力学模型。为深入分析混合弹流润滑下动态啮合力与磨损量之间的关系,将累加的磨损量作为齿侧间隙代入到动力学模型中,最终得到不同啮合次数下的动态啮合力和磨损量。考虑动态啮合力与润滑的影响能够呈现静态干摩擦中所没有的啮合动态冲击特性。计算结果表明:进入段的磨损量大于退出段的磨损量;动态啮合力会随着磨损量的增加,在进入段增大,在退出段减小;在磨损初期动态啮合力会随着磨损量增加迅速收敛;油膜刚度对动态啮合力较为敏感,而不会受初期磨损的影响;综合刚度与承载系数在初期磨损时不会变化。Aiming at the problem that the existing wear calculation method is difficult to accurately solve the wear of internal gears under mixed elastohydrodynamic lubrication,a calculation model of adhesive wear and dynamic coupling was proposed.According to the theory of elastohydrodynamic lubrication,the formula of oil film stiffness was obtained.The comprehensive stiffness model under mixed elastohydrodynamic lubrication conditions was constructed by combining oil film stiffness,tooth surface contact stiffness,and load factor to improve the dynamic model.In order to deeply analyze the relationship between the dynamic meshing force and the wear amount under the mixed elastohydrodynamic lubrication,the accumulated wear amount was substituted into the dynamic model as the flank clearance,and the dynamic meshing force and wear amount under different meshing times were finally obtained.The calculation results show that the wear amount entering the meshing section is greater than the wear amount of the exiting meshing section;the dynamic meshing force will increase with the wear amount,and it will increase in the meshing section and decrease in the exiting meshing section.As the wear amount increases,it converges quickly;the oil film stiffness is sensitive to the dynamic meshing force and is not affected by the initial wear;the overall stiffness and load factor do not change during the initial wear.

关 键 词：内啮合直齿轮 黏着磨损 混合弹流润滑 承载系数 油膜刚度 动态啮合力 

分 类 号：V232.8[航空宇航科学与技术—航空宇航推进理论与工程]