流体机械2026，Vol.54Issue(1)：40-48,9.DOI:10.3969/j.issn.1005-0329.2026.01.006
考虑甲烷溶解的机械密封瞬态特性研究
Study on the transient characteristics of mechanical seals considering methane dissolution
摘要
Abstract
To address the issue of axial floating and angular deflection of the seal ring caused by changes in methane solubility and gas volume fraction in the oil phase within multiphase pumps,as well as slug flow impact,leading to seal ring wear failure,a transient dynamic model for oil-gas two-phase flow lubricated sealing considering methane dissolution is established.The model is solved using the finite difference method and the Euler method.The transient response characteristics of the seal before and after considering methane dissolution are compared,and the effects of axial pulsation and angular impact on the seal under different gas volume fractions when considering methane dissolution are investigated.The results show that when methane dissolution is considered,the fluctuations in film thickness and leakage rate are smaller,and the opening force tends to be consistent;during stage Ⅱ of axial vibration,when the gas volume fraction is 0.8,the displacement of the stationary ring is reduced by 3.25 times compared to when the gas volume fraction is 0;the stationary ring is less affected by angular impact,with the maximum change in central film thickness not exceeding 0.1 μm;when the gas volume fraction ranges from 0 to 0.8,the response of sealing performance to axial pulsation follows the same pattern;when the gas volume fraction is 0,the impact of angular shock on sealing performance is relatively small.This study provides theoretical guidance for the application of oil-gas two-phase sealing in multiphase pumps.关键词
多相泵/油气两相密封/甲烷溶解/含气率/瞬态响应Key words
multiphase pump/oil-gas two-phase sealing/methane dissolution/gas volume fraction/transient response分类
机械制造引用本文复制引用
王青阳,王增丽,吴伟烽,张平,孙玉德..考虑甲烷溶解的机械密封瞬态特性研究[J].流体机械,2026,54(1):40-48,9.基金项目
国家自然科学基金项目(52076162) （52076162）
陕西高校青年创新团队 （）
秦创原"科学家+工程师"队伍建设(2024QCY-KXJ-004) （2024QCY-KXJ-004）
