摘要
为了深入探讨机械密封椭圆微孔端面的动力润滑性能,应用计算流体力学软件FLUENT,基于Navier-Stokes方程,建立单一椭圆型微孔端面不可压缩牛顿流体的三维CFD动力润滑模型,分析微孔深度、倾斜角、长短轴之比以及雷诺数对液膜承载力和微孔端面摩擦因数的影响。结果表明:当其他因素不变且仅考虑单一因素的影响时,微孔深度为端面间隙的1/2时液膜承载力最大、摩擦因数最小,端面间的液体动力润滑性能最好;倾斜角为45°时,液膜承载力有最大值,摩擦因数有最小值,端面间液体动力润滑性能也达到最佳;随椭圆微孔长宽比的增加,液膜承载力增大,摩擦因数减小,液体动力润滑性能提高。
In order to further discuss the hydrodynamic lubrication of mechanical seal surface with ellipse microdimple, a three-dimensional hydrodynamic lubrication model of the incompressible Newtonian fluid on the mechanical seal surface with a single microdimple based on the full Navier-Stokes equation was set up by FLUENT software. The effects of such as microdimple depth, inclination angle, slender ratio, Reynolds number on load-carrying capacity and friction coefficient were analyzed. Under the condition of the other three factors are constant and the microdimple depth is 1/2 of end clearance, both the fluid load carrying capacity and friction coefficient get the optimal value. The optimal value of fluid load carrying capacity and friction coefficient are got when the inclination angle is 45°. With the increasing of the length-width ratio ,the value of bearing capacity is increased, but the value of friction coefficient is decreased.
出处
《润滑与密封》
CAS
CSCD
北大核心
2013年第6期81-85,107,共6页
Lubrication Engineering
关键词
机械密封
椭圆微孔表面
动力润滑
mechanical seal
ellipse microdimple surface
hydrodynamic lubrication
作者简介
作者简介：石卓（1985-），男，硕士研究生，研究方向为流体密封技术．E—mail：sz223@126．com．
通讯作者：陆晓峰（1966-），男，教授，硕士研究生导师，研究方向为过程装备密封技术及流体机械的结构与强度．E-mail：xflu@njut．edu．cn．
