弹性滚子间油膜的热流体动力润滑分析

发布时间：2018-09-11 21:02

【摘要】：本文研究了弹性滚子间油膜的流体动力流润滑理论，全文主要包括三部分内容，即圆锥与平面的间隙公式的推导、两圆柱和两正反圆锥滚子的等温弹流润滑以及它们的热弹流润滑数值解。第一部分对圆锥滚子进行几何分析，推导了圆锥与平面的间隙公式，该公式既适用于圆锥滚子又适用于圆柱滚子。第二部分是在第一部分的基础上，以圆锥轴承、圆锥齿轮和斜齿轮为工程背景，研究了两圆柱和两正反圆锥滚子的弹流润滑问题，得到了这些问题的等温解。进而分析了圆锥锥度、不同的母线修形函数和修形幅值、滚子间倾角及滚子的端部圆角半径等参数对两圆柱和两正反圆锥滚子等温弹流润滑性能的影响。结果表明，余弦修形对滚子的润滑最为有利，而上述参数的改变均会对滚子中部和端部油膜厚度产生重要的影响。第三部分以前两部分为基础，先对两同向圆锥滚子的热非牛顿解、热牛顿解、等温非牛顿解和等温牛顿解做了分析与讨论，接下来具体研究了最大Hertz接触压力和滑滚比等参数对两同向圆锥滚子以及两反向圆锥滚子的热非牛顿润滑状况的影响。结果表明，，在本文的参数范围内，热效应总是使得接触区内的润滑状况变差，而母线修形和端部修形等措施对改善润滑性能总是有效的。
[Abstract]:The hydrodynamic lubrication theory of oil film between elastic rollers is studied in this paper. The whole paper mainly includes three parts: the derivation of the gap formula between the cone and the plane. The isothermal elastohydrodynamic lubrication of two cylinders and two positive and inverse cone rollers and their thermal elastohydrodynamic lubrication numerical solutions. In the first part, the geometric analysis of cone roller is carried out, and the gap formula between cone and plane is derived, which is applicable to both cone roller and cylindrical roller. In the second part, on the basis of the first part, the elastohydrodynamic lubrication problems of two cylinders and two positive and negative cone rollers are studied, and the isothermal solutions of these problems are obtained by taking the cone bearings, bevel gears and helical gears as the engineering background. Furthermore, the effects of cone taper, different busbar modification function and modification amplitude, dip angle between rollers and radius of end of roller on the isothermal elastohydrodynamic lubrication properties of two cylinders and two positive and negative cone rollers are analyzed. The results show that cosine modification is most favorable to the lubrication of roller, and the change of the above parameters will have an important effect on the thickness of the oil film in the middle and end of the roller. In the third part, the thermal non-Newtonian solution, thermal Newtonian solution, isothermal non-Newtonian solution and isothermal Newton solution are analyzed and discussed. Then the influence of the maximum Hertz contact pressure and the slip ratio on the thermal non-Newtonian lubrication of two coaxial cone rollers and two reverse cone rollers is studied in detail. The results show that in the range of the parameters in this paper, the thermal effect always makes the lubrication condition in the contact area worse, while the busbar modification and the end modification are always effective to improve the lubricating performance.
【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

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