考虑弹流润滑效应的高速角接触球轴承刚度特性研究

发布时间：2018-03-04 05:04

本文选题：高速球轴承　切入点：弹流润滑效应　出处：《西北工业大学学报》2016年01期 　论文类型：期刊论文

【摘要】：高速角接触球轴承的刚度特性对航空发动机转子系统的动态特性有着重要影响。为获得油润滑条件下角接触球轴承刚度特性,需要考虑弹流润滑效应对轴承刚度的影响。基于Jones拟静力学模型,建立了考虑弹流润滑影响的耦合滚动体/套圈接触刚度和油膜刚度的滚动轴承刚度计算模型。应用滚动轴承刚度计算模型分析了弹流润滑效应对角接触球轴承刚度的影响规律。研究结果表明:与不考虑弹流润滑效应的情况相比,考虑弹流润滑效应的角接触球轴承刚度有较明显的降低;较之轴承轴向刚度,轴承径向刚度对弹流润滑效应更为敏感;在考虑弹流润滑效应的情况下,润滑油动力黏度和黏压系数的增大均使得轴承刚度减小,黏温系数的增大仅使得轴承径向刚度增大,但对轴向刚度几乎没有影响;随着转子转速的升高,弹流润滑效应对轴承径向刚度的影响愈加明显,但对轴向刚度的影响逐渐弱化;随着轴向载荷的增加,弹流润滑效应对轴承刚度的影响缓慢增大;随着径向载荷的增加,弹流润滑效应对轴向刚度的影响缓慢减小,而对径向刚度的影响则几乎保持不变。
[Abstract]:The stiffness characteristics of high speed angular contact ball bearings have an important effect on the dynamic characteristics of aero-engine rotor system. In order to obtain the stiffness characteristics of angular contact ball bearings under oil lubrication, The effect of elastohydrodynamic lubrication on bearing stiffness should be considered. Based on Jones pseudostatics model, The stiffness calculation model of rolling bearing considering the effect of elastohydrodynamic lubrication on the contact stiffness of coupled rolling body / ring and oil film is established. The stiffness calculation model of rolling bearing is applied to analyze the stiffness of angular contact ball bearing with elastohydrodynamic lubrication effect. The results show that the effect of EHL is better than that of EHL. The stiffness of angular contact ball bearing considering elastohydrodynamic lubrication effect is obviously reduced, the radial stiffness of bearing is more sensitive to elastohydrodynamic lubrication effect than the axial stiffness of bearing, and when the elastohydrodynamic lubrication effect is considered, the angular contact ball bearing stiffness is more sensitive to the elastohydrodynamic lubrication effect than the bearing axial stiffness. With the increase of dynamic viscosity and pressure coefficient of lubricating oil, the stiffness of bearing decreases, and the increase of viscosity and temperature coefficient only increases the radial stiffness of bearing, but has little effect on axial stiffness. The effect of elastohydrodynamic lubrication on the radial stiffness of bearing becomes more and more obvious, but the effect on axial stiffness becomes weaker; with the increase of axial load, the effect of elastohydrodynamic lubrication on bearing stiffness increases slowly; with the increase of radial load, the effect of elastohydrodynamic lubrication on bearing stiffness increases slowly. The effect of elastohydrodynamic lubrication on axial stiffness decreases slowly, while the influence on radial stiffness is almost unchanged.
【作者单位】：西北工业大学机电学院;河南省机械设计及传动系统重点实验室;
【基金】：国家自然科学基金(51375148)资助
【分类号】：TH133.3

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