多孔端面机械密封内流场的数值分析  

Numerical analysis on flow field in mechanical seal with porous seal ring face

作　　者：陈汇龙[1] 翟晓[1] 赵斌娟[1] 杨生华[2] 李亚南[3] 陈萍[1] 

机构地区：[1]江苏大学能源与动力工程学院,江苏镇江212013 [2]江苏友谊汽车有限公司,江苏张家港222000 [3]江苏大学流体机械工程技术研究中心,江苏镇江212013

出　　处：《排灌机械》2009年第6期398-402,共5页Drainage and Irrigation Machinery

基　　金：江苏省自然科学基金资助项目(BK2007095);江苏省高校自然科学基础研究项目(06KJB480019)

摘　　要：为了研究由激光加工的多孔端面机械密封的内部流动问题,以被加工密封面的单个微凹腔作为模型,采用计算流体力学(CFD)软件求解N-S方程和k-ε方程,得出环两侧无压状态下的压力、速度和能量分布图,以及环两侧加压状态下单个微凹腔的动静压分布图,并对计算结果进行了分析.研究表明:合适的微孔尺寸可以产生流体动压效应,此时可产生液膜开启力;凹腔的动压分布受凹腔两侧压差的影响,动压分布的改变能够产生一定的液膜阻力,起到减缓泄漏的作用.研究结果为深入了解多孔端面机械密封动压效应的形成机理以及微凹腔的优化设计,提供理论参考.In order to analysize the inner flow mechanism in the mechanical seal with laser-textured por- ous face, the single pore of sealing surface was chosen as a model and the N - S equation and k -ε equa- tions were computed based on Computational Fluid Dynamics（CFD） method. The distributions of pres- sure, velocity and energy were educed when there was no differential pressure on the two sides of ring, as well as the distributions of a static and dynamic pressure when there had differential pressure on the two sides of ring. By analysis, it is found that a suitable size of micro-pore can cause hydrodynamic pressure effect produce a open force in the meantime. Influenced by the pressure difference on the two sides of mi- cro-pore face, the dynamic pressure was changed there, producing film resistance and preventing lea- king. This work can give some theoretical references for better understanding of hydrodynamic pressure effect in the mechanical seal with porous seal ring face and optimal design of micro lubricative pores.

关 键 词：机械密封 多孔端面 微凹腔 动压效应 数值分析 

分 类 号：TB42[一般工业技术]