High mechanical strength , it can stand heavy dynamic and static load . it is used in high load capacities and low speed with rotational , oscillating or frequent stop - start motion 机械强度大，能承受较大的动、静载荷。适用于高载低速下的旋转运动，摇摆运动及经常在载荷下启闭频繁而不易形成流体动力润滑的结合。
Based on theory of gear driving , fluid mechanics , hydrodynamic lubrication , polymer rheology and single - screw extrusion , key structure design principles in melt pump are summarized , some theory foundations are also deduced 结合齿轮传动、动力润滑、流体力学、高聚物加工流变学以及单螺杆挤出理论的部分知识对熔体泵结构设计中的主要问题进行了总结，并对其中部分理论依据进行了推导。
A general reynolds equation based on er fluid model is obtained , which can be easily extended to other non - newtonian fluids and this equation can provide theoretical basis for the hydrodynamic analysis of er journal bearings 首次推导了基于电流变流体的润滑问题广义雷诺方程，并可扩展到其他非牛顿流体的润滑问题，为进行基于电流变流体的滑动轴承流体动力润滑分析提供了理论依据。
In this paper , based on the theory of ehl ( elasto - hydrodynamic lubrication ) , a study is conducted to investigate the impacts of geared factors ( including gear speed ratio , gear teeth modulus and center distance ) on the lubrication behavior of gearing , and some useful conclusions are obtained 应用弹性流体动力润滑理论，计算分析了传动比、模数及中心距等齿轮参数对齿轮副润滑性能的影响，得出了一些有益的结论。
Based on hydrodynamic lubrication theory , a rectangular tire tread model for simulating the viscous hydroplaning of tire is set up , taking into consideration the effects of hydrodynamic action , squeeze action and road roughness with numerical solutions obtained 摘要根据流体动力润滑理论，将轮胎猫性滑水问题模拟为胎面单元与路面之间的动压、挤压膜问题，同时考虑了路面粗糙度的影响，建立了轮胎胎面单元黏性滑水问题的数学模型，并进行数值求解。
( 2 ) the foil bearing is treated as a continuous flexible surface which is supported on an elastic foundation . the stiffness and damping of the film are assumed to be liner and constant everywhere . the fluid is modeled by using the reynolds equation for a compressible gas ( 2 )建立了具有线性结构刚度和阻尼的弹性箔片轴承模型，并对这一弹性流体动力润滑( ehdl )问题建立了由非定常可压缩雷诺方程和弹性箔片平衡方程及其边界条件组成的控制方程。
Abstract : this paper derives thecalculating formulas to the contact strength and oil - film thickness of the involute spur gear according to hydrodynamic lubrication principle . through check with test , shows that they may rully replace now available hertz formula and dowsonformula respectively 文摘:根据流体动力润滑原理，推导出了渐开线直齿圆柱齿轮接触强度及油膜厚度的计算公式，通过实验验证，说明它们可以完全分别代替现有的赫芝公式及通森公式。
3 ) based on the analysis result of equal contact stress curve and the theory of elasto - hydrodynamic lubrication , the expression of the oil film thickness between roller ( or ball ) and orbit are calculated . the simulation result proved that the thickness of oil film is enough for bearing and lubricating ( 3 )基于等接触应力曲线的求解结果和弹性流体动力润滑理论，求得滚动体和轨道曲线间的油膜厚度表达式，并通过仿真分析论证了马达正常工作时这种油膜能满足承载能力和润滑的需要。
