排灌机械工程学报2025，Vol.43Issue(9)：890-897,913,9.DOI:10.3969/j.issn.1674-8530.23.0135
端面粗糙度对高温密封润滑膜汽化特性的影响
Influence of end surface roughness on vaporization characteristics of high-temperature sealing lubricant films
摘要
Abstract
Taking the spiral groove high-temperature liquid dynamic pressure mechanical seal as the research object,a stochastic rough surface model of the sealing end face conforming to a Gaussian dis-tribution was established based on the autocorrelation function method,along with a two-phase vapor-liquid flow calculation model.The influence of roughness at different locations on the end face on the vaporization characteristics and sealing performance of the lubricating film was then simulated and ana-lyzed.The results indicate that when the end face is rough,the vaporization region of the lubricating film is mainly concentrated in the groove-dam area,with the highest degree of vaporization occurring in the inner groove region of the spiral groove.End face roughness causes the isolines of the average vapor volume fraction in the lubricating film to exhibit irregular wavy patterns,which become more pro-nounced with increasing roughness.The average vapor phase volume fraction of the lubricating film de-creases with increasing end face roughness,while the opening force increases with greater end face roughness.Additionally,the leakage rate through the sealing gap decreases as the end face roughness increases.The influence of roughness at various locations on the vaporization characteristics and sealing performance exhibits a cumulative effect when the entire end face is rough.The impact of unit rough-ness at different locations on the vaporization characteristics of the lubricating film and sealing perfor-mance follows the order from largest to smallest:roughness in the non-groove area of the dynamic ring,roughness on the end face of the static ring,and roughness in the groove area of the dynamic ring.关键词
动压型机械密封/表面粗糙度/高温/汽液两相流/数值模拟Key words
dynamic pressure mechanical seal/surface roughness/high temperature/gas-liquid flow/numerical simulation分类
机械制造引用本文复制引用
陈汇龙,刘瑞睿,史迪超,付燕霞,赵斌娟,杨敬江..端面粗糙度对高温密封润滑膜汽化特性的影响[J].排灌机械工程学报,2025,43(9):890-897,913,9.基金项目
国家自然科学基金资助项目(51976078) （51976078）
