Establishment of Non-Newtonian Thermal Elastohydrodynamic Lubrication Theory

等温弹流润滑理论对于改善非协调面集中接触零件的工作性能、功能和耐久性具有重要作用。从理论和实验的角度重新考虑等温弹流理论，建立了非牛顿热弹流润滑理论的基础.通过实验阐明了等温弹流分析的局限性。研究还发现，EHL制度分为三种类型，即，过度淹没，完全淹没和饥饿。利用横向脊，从实验的角度讨论了表面破坏的原因。建立了点接触热弹流润滑问题的非牛顿数值分析方法，研究了表面粗糙度对点接触热弹流润滑油膜厚度分布、润滑油膜厚度分布和润滑油膜厚度分布的影响。 关于我们 压力和温度和牵引系数进行了讨论。此外，还讨论了表面粗糙度方向和接触面椭圆率对表面失效的影响。通过对粗糙-光滑表面油膜温度的测量，证明了油在弹流接触中的非牛顿流体行为.影响滚动接触疲劳现象的油膜压力分布取决于两个接触表面的导热系数、滑滚比和压粘系数。在很低的滑滚比下，压缩加热对牵引系数的影响很大.讨论了滚动/滑动条件下冲击载荷的影响.从实验和理论两方面探讨了往复运动下的摩擦学特性.在此基础上，阐明了往复式密封油膜击穿机理和碳粒磨损机理，并研制了一种新的润滑脂弹流润滑油膜介质击穿检测装置。少

Isothermal elastohydrodynamic lubrication (EHL) theory has played an important role for improving the working performance, function and durability of machine elements having a concentrated contact between non-conforming surfaces. The basis of non-Newtonian thermal elastohydrodynamic lubrication theory has been established by reconsidering the isothermal EHL theory from the theoretical and experimental viewpoints which consider temperature distributions in all directions in the contact.1. The limitation of isothermal EHL analysis has been elucidated experimentally. It is also found that the EHL regime is divided into three types, i.e., over flooded, fully flooded and starved.2. By using transversely oriented ridges, the causes of surface failures have been discussed from experimental viewpoints. A non-Newtonian numerical analysis method for the thermal EHL problems in point contacts has been developed, and the effects of surface roughness on the film thickness profile, distributions of … More pressure and temperatures and the traction coefficient have been discussed. Furthermore, the effects of the surface roughness orientation and the ellipticity ratio of the contacts on surface failures have been discussed. Based on the oil film temperature measurements for rough-smooth surfaces, it has been proved that the oil in EHL contacts behaves as a non-Newtonian fluid.3. The film pressure distribution, which affects the rolling contact fatigue phenomenon, depends on the thermal conductivities of both contacting surfaces, slide-roll ratio and pressure-viscosity coefficient. The compressive heating plays a significant role on the traction coefficient at very low slide-roll ratios.4. The effects of impact loads under rolling/sliding conditions have been discussed.5. Tribo-characteristics under reciprocating motion have been discussed from experimental and theoretical viewpoints.6. Based on the results described in above, the mechanism of oil film breakdown of reciprocating seals, the mechanism of soot wear have been clarified, and a new device, which can detect the dielectric breakdown of the grease EHL film, has been developed. Less