基于非牛顿流体的圆柱齿轮副热弹流润滑研究

发布时间：2018-03-09 11:45

本文选题：圆柱齿轮　切入点：有限长线接触　出处：《南京航空航天大学》2016年硕士论文　论文类型：学位论文

【摘要】：圆柱齿轮具有传动效率高、结构紧凑、承载能力大等优点,因此被广泛应用于船舶、汽车、航空等领域。润滑失效是圆柱齿轮传动失效的主要方式之一,而油膜破裂导致金属固体直接接触,产生局部高温,容易形成齿面磨损、胶合等失效形式。目前,齿轮的摩擦、磨损及润滑问题的研究已成为新的热点研究区域。本文以圆柱齿轮副为研究对象,基于有限长线接触模型,开展其非牛顿流体热弹流润滑研究,为齿轮参数设计提供摩擦学理论依据,具有一定的理论意义和工程应用价值。本文主要从以下五方面开展工作:1)圆锥滚子接触副的弹流润滑数值研究。以圆锥滚子与无限大刚性平面接触模型为研究对象,研究其压力、膜厚和温度的分布情况,分析不同工况下摩擦系数的变化规律,为斜齿轮传动的润滑分析提供理论基础。2)直齿轮副非牛顿流体热弹流润滑数值研究。针对直齿轮副弹流润滑模型,考虑流体的非牛顿特性、时变效应以及热效应,研究工况参数对其摩擦特性的影响。3)斜齿轮副牛顿流体等温弹流润滑数值研究。将斜齿轮啮合等效为两个反向圆锥接触的润滑模型,结合啮合过程中曲率半径、卷吸速度、滑滚比以及载荷分配的变化规律,研究斜齿轮在不同接触位置及啮合位置的润滑特性,分析工况参数对斜齿轮副润滑性能的影响。4)斜齿轮副非牛顿流体热弹流润滑数值研究。在斜齿轮副牛顿流体润滑研究基础上,考虑流体的非牛顿特性以及热效应对其斜齿轮副润滑性能的影响,应用多重网格法进行求解,获得其润滑特性参数,分析工况参数对摩擦系数的影响规律。5)有限长线接触弹流润滑试验研究。利用摩擦磨损试验机测量圆锥滚子与圆盘接触润滑的摩擦系数,且与理论结果对比分析,以验证前文有限长线接触理论研究的正确性。
[Abstract]:Cylindrical gears have the advantages of high transmission efficiency, compact structure and large bearing capacity, so they are widely used in ship, automobile, aviation and other fields. Lubrication failure is one of the main methods of cylindrical gear transmission failure. However, oil film rupture leads to direct contact of metal solids, resulting in local high temperature. It is easy to form tooth surface wear, adhesion and other failure forms. At present, the friction of gears, The study of wear and lubrication has become a new hot research area. In this paper, the non-Newtonian fluid thermo-elastohydrodynamic lubrication is studied on the basis of finite length linear contact model. It provides the tribological theory basis for gear parameter design. This paper mainly studies the elastohydrodynamic lubrication of cone roller contact pair in the following five aspects. The contact model between cone roller and infinite rigid plane is taken as the object of study. The distribution of pressure, film thickness and temperature is studied, and the variation law of friction coefficient under different working conditions is analyzed. This paper provides a theoretical basis for lubrication analysis of helical gear transmission. (2) numerical study of non-Newtonian fluid thermo-elastohydrodynamic lubrication of spur gear pair. The non-Newtonian characteristic, time-varying effect and thermal effect of fluid are considered for the elastohydrodynamic lubrication model of spur gear pair. Study on the influence of working condition parameters on the friction characteristics of helical gear pair numerical study of Newtonian fluid isothermal elastohydrodynamic lubrication. The meshing of helical gear is equivalent to that of two reverse cone contact lubrication models combined with curvature radius and entrainment speed during meshing. The lubricating characteristics of helical gears at different contact positions and meshing positions are studied according to the variation of slip roll ratio and load distribution. Analysis of the influence of working condition parameters on the Lubrication performance of Helical Gear pair. (4) numerical study on Non-Newtonian fluid Thermal Elastohydrodynamic Lubrication of Helical Gear pair. Based on the study of Helical Gear pair Newtonian fluid Lubrication, Considering the non-Newtonian characteristics of the fluid and the influence of thermal effect on the lubrication performance of the helical gear pair, the multiple mesh method is used to solve the problem, and the lubrication characteristic parameters are obtained. The friction coefficient of contact lubrication between taper roller and disc is measured by friction and wear test machine, and the results are compared with the theoretical results. In order to verify the correctness of the previous finite line contact theory.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TH132.41

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