歪斜滚子副等温弹流润滑研究

发布时间：2018-06-18 22:22

本文选题：波动供油 + 有限长线接触　；参考：《青岛理工大学》2011年硕士论文

【摘要】：本文主要从理论和试验两方面研究了歪斜滚子副的等温弹流润滑问题。全文共包括四个部分，即波动供油条件下滚子副乏油润滑性能分析；歪斜滚子与无限大平面间接触副的弹流润滑分析；基于轴承中滚子歪斜的润滑机理研究；滚子副油膜测量试验台设计制造及试验结果研究。首先，基于工程实际的供油条件，提出了一种特殊供油函数，定性模拟滚子副乏油现象，并在学习和掌握了乏油润滑的数值计算方法基础上，求出了特殊供油条件下滚子副乏油润滑的完全数值解。结果表明，接触区润滑状态不仅受到乏油量的影响，而且与供油模型中的供油波长及幅值有关。其次，以有限长滚子与无限大平面间形成的接触副为模型，研究了滚子歪斜条件下滚子副等温稳态接触弹流润滑问题，讨论了滚子歪斜条件下卷吸速度、载荷及端部修形引起的改变。分析表明，滚子歪斜会降低接触区润滑性能，，但与滚子偏斜的影响相比，其危害程度相对较弱。然后，基于实际圆柱滚子轴承，建立滚子与套圈间接触的弹流润滑数学模型，得到了歪斜滚子与套圈间弹流润滑的完全数值解。分析了滚子歪斜角对接触副润滑状况的影响，并在滚子歪斜条件下研究了不同的套圈半径、卷吸速度、载荷和滚子长度对接触区润滑性能的影响，并采用滚子修形手段来降低滚子歪斜带来的危害。最后，为了实现有限长线接触弹流润滑中滚子歪斜或偏斜的特殊测量需要，设计制造了一台滚子副油膜测量试验台，采用了一种特殊的调倾装置，可以实现滚子歪斜或偏斜条件下接触区内润滑油膜测量。同时对滚子歪斜条件下不同滚子歪斜角度、卷吸速度和载荷条件下的试验结果进行了分析，并与理论结果做了定性对比，变化规律具有一致性。
[Abstract]:In this paper, the isothermal elastohydrodynamic lubrication of askew roller pair is studied theoretically and experimentally. The paper includes four parts: the analysis of the lubrication performance of the roller pair under fluctuating oil supply condition, the elastohydrodynamic lubrication analysis of the contact pair between the askew roller and the infinite plane, the study of lubrication mechanism based on the askew of the roller in the bearing; Design, manufacture and test results of oil film measuring bench for roller accessory. First of all, based on the actual oil supply conditions in engineering, a special oil supply function is proposed to qualitatively simulate the lack of oil in roller pairs, and on the basis of studying and mastering the numerical calculation method of the lubrication of spent oil, The complete numerical solution for the lubrication of the roller pair under the special oil supply condition is obtained. The results show that the lubrication state of the contact zone is affected not only by the oil shortage but also by the oil supply wavelength and amplitude in the oil supply model. Secondly, taking the contact pair formed between the finite length roller and the infinite plane as the model, the isothermal steady contact elastohydrodynamic lubrication problem of the roller pair under the condition of the roller skew is studied, and the entrainment velocity under the condition of the roller skew is discussed. Changes caused by load and end modification. The analysis shows that the roller skew can reduce the lubrication performance of the contact area, but compared with the influence of the roller deflection, its harm degree is relatively weak. Then, based on the actual cylindrical roller bearing, a mathematical model of elastohydrodynamic lubrication between roller and ring is established, and the complete numerical solution of elastohydrodynamic lubrication between skew roller and ring is obtained. The influence of roller skew angle on the lubrication condition of contact pair is analyzed, and the influence of different ring radius, entrainment speed, load and roller length on the lubrication performance of contact area is studied under the condition of roller skew. The method of roller shape modification is used to reduce the harm caused by roller skew. Finally, in order to realize the special measurement needs of roller skew or deflection in finite length contact elastohydrodynamic lubrication, a roller auxiliary oil film measuring test-bed is designed and manufactured, and a special tilting device is adopted. The measurement of lubricating oil film in contact area can be realized under the condition of roller skew or deflection. At the same time, the experimental results under different roller skew angles, entrainment speed and load are analyzed and compared qualitatively with the theoretical results.
【学位授予单位】：青岛理工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH117.2

【引证文献】