化工学报2017，Vol.68Issue(8)：3190-3201,12.DOI:10.11949/j.issn.0438-1157.20170299
相变对螺旋槽液膜密封性能的影响
Effect of phase change on performance of spiral groove liquid film seals
摘要
Abstract
In order to investigate phase change effect of liquid film on sealing performance of spiral groove liquid film seals, phase change model of non-contacting liquid film seals was established on the basis of mass conservation and mass source from Hertz equation. By discretization of governing equations with finite volume method, the effect of liquid film phase change on sealing performance was analyzed. Results show that phase change on sealing performance is closely related to sealing effectiveness. Both groove position and phase distribution in dynamic pressure groove have significant influence on sealing performance and pressure distribution at end face. During phase change in liquid film, seal opening force was increased but leakage was decreased for downstream pump seal, whereas the effect was different for upstream pumping seal. If the slot was close to inner diameter, seal opening force of upstream pumping seal was first increased and then decreased, but leakage was first decreased and then increased and finally decreased. If the slot was close to outer diameter, seal opening force of upstream pumping seal was increased linearly but leakage was first decreased and then increased. Phase transition occurred in groove region could strongly weaken hydrodynamic effects and largely impact on pressure distribution at the end face.关键词
相变/液膜密封/密封性能/赫兹方程Key words
phase change/liquid film seal/sealing performance/Hertz equation分类
通用工业技术引用本文复制引用
曹恒超,郝木明,李振涛,杨文静,孙震,汪艳红,任付军..相变对螺旋槽液膜密封性能的影响[J].化工学报,2017,68(8):3190-3201,12.基金项目
国家自然科学基金项目(51375497) （51375497）
山东省自主创新及成果转化专项项目(2014ZZCX10102-4). supported by the National Natural Science Foundation of China (51375497) and the Shandong Special Projects of Independent Innovation and Achievement Transformation (2014ZZCX10102-4). （2014ZZCX10102-4）
