排灌机械工程学报2016，Vol.34Issue(9)：783-789,7.DOI:10.3969/j.issn.1674-8530.15.0277
端部效应修正螺旋窄槽理论应用于液膜机械密封的解析法
Analytical method for liquid film mechanical seals based on theory of narrow spiral groove with end effect modification
摘要
Abstract
In the design of upstream pumping mechanical seal with spiral grooves,the end effect in which a pressure loss occurs at the inlet of spiral grooves when the liquid is pumped into the grooves is not taken into account,causing in a significant deviation in analytical prediction from experimental ob-servation.In order to predict the performance of a mechanical seal accurately and efficiently by an ana-lytical method,the end effect is considered,the pressure at the spiral groove root is modified.The modified analytical expressions of liquid film pressure and opening force are obtained.The opening force is compared with the force obtained by the analytical method without end effect or with experiment or based on numerical simulation.The opening force with end effect is consistent with the experimental measurement and the numerical prediction.Compared with the numerical simulation,the mean and maximum errors in opening force are 1.9% and 6.2%,respectively,under a low pressure difference condition;compared with experimental data,however,these errors increase to 8.6%and 15.5%,re-spectively.The mean and maximum errors in opening force are 1 .9% and 2.5% compared with nu-merical simulation under a high pressure difference condition.The results provide a reference for the investigation,design and application of upstream pumping mechanical seals.关键词
机械密封/螺旋槽/上游泵送/窄槽理论/端部效应Key words
mechanical seal/spiral groove/upstream pumping/narrow groove theory/end effect分类
农业科技引用本文复制引用
宋鹏云,陈果..端部效应修正螺旋窄槽理论应用于液膜机械密封的解析法[J].排灌机械工程学报,2016,34(9):783-789,7.基金项目
昆明理工大学学科方向团队资助项目 （）
