流体静压型机械密封的三维传热数学模型及端面温度分析  

Numerical Analysis of Three-Dimensional Heat Transfer Model of Hydrostatic Mechanical Seals

作　　者：刘伟[1] 彭旭东[1,2] 白少先[1,2] 孟祥铠[1,2] 盛颂恩[1,2] 

机构地区：[1]浙江工业大学机械工程学院,浙江杭州310032 [2]浙江工业大学过程装备及其再制造教育部工程研究中心,浙江杭州310032

出　　处：《摩擦学学报》2010年第1期57-63,共7页Tribology

基　　金：国家自然科学基金资助项目(50575152;50775206;50805130);浙江省科技计划资助项目(2008C21125)的资助

摘　　要：建立了静环倾斜时流体静压型机械密封的三维稳态传热模型,考虑流体黏度随压力、温度的变化,建立了压力、温度的控制方程,采用有限差分法,分析研究了倾斜量、结构参数及操作参数对机械密封温度分布的影响规律.结果表明,端面的最大液膜压力和最高温度随静环倾斜量的增加而增大,倾斜量越大,压黏效应越显著;端面温升受密封的结构参数、操作参数影响明显.静环端面锥角越大,温升越小;流体注入温度越低,温升越大;动环转速越高,温升越大.A three - dimensional heat transfer model of the hydrostatic mechanical seals was established considering the misalignment of the stator. The governing equations, considering the variation of dynamic viscosity to fluid pressure and temperature variations, were numerically solved by using finite difference method. The effects of stator＇s misalignment, heat convection coefficients and operating conditions on the temperature distribution of such a mechanical seal were studied. It is found that the maximum film pressure and the maximum temperature increased as the misalignment of the stator increased, and the effect of pressure - viscosity became more obvious when the misalignment became larger. Face temperature rises were affected obviously by operating conditions as well as stator＇s misalignment and stator＇s coning angle. A larger coning angle resulted in a lower face temperature rise and a lower temperature of the inlet fluid led to a higher face temperature rise. A higher velocity of the rotator led to a higher face temperature rise.

关 键 词：机械密封 流体静压 传热模型 端面温升 

分 类 号：TH117.2[机械工程—机械设计及理论]