机械密封椭圆微孔端面动力润滑性能  

Hydrodynamic Lubrication of Mechanical Seal Surface with Ellipse Microdimple

作　　者：石卓[1] 徐国平[1] 陆晓峰[1] 张林 

机构地区：[1]南京工业大学机械与动力工程学院,江苏南京211816 [2]苏州海陆重工股份有限公司,江苏张家港215600

出　　处：《润滑与密封》2013年第6期81-85,107,共6页Lubrication Engineering

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.

关 键 词：机械密封 椭圆微孔表面 动力润滑 

分 类 号：TB42[一般工业技术]