基于质量守恒边界条件的下游泵送螺旋槽液膜密封空化分析

杨文静1 郝木明1 曹恒超1 袁俊马1 李晗1

(1.中国石油大学 (华东) 化学工程学院, 山东青岛 266580)

【摘要】液膜中空化的产生会影响密封润滑性能。基于质量守恒的JFO空化边界条件, 建立螺旋槽液膜密封数学模型, 采用流线迎风有限元法求解Reynolds控制方程, 获得端面空化分布, 并通过可视化试验进行了验证。以空化临界转速和临界压力为表征, 分析了螺旋槽结构参数对空化特性的影响。结果表明:螺旋槽内空化区域呈机翼截面型, 且随着转速的增加而变大, 随着内径压力的增加而减小, 空化周向最大长度位于近槽根处;空化临界转速随着槽数、槽深的增加而增加, 随着螺旋角、槽长坝长比、槽台宽比的增加而减小;空化临界压力随各结构参数的变化趋势与空化临界转速相反。通过对各结构参数的合理选择, 可实现对空化的有效控制。

【关键词】 螺旋槽液膜密封; 空化; 结构参数; 空化临界转速; 空化临界压力; 有限元法;

【DOI】

【基金资助】 国家自然科学基金项目 (51375497) 国家自然科学基金项目 (51375497) 东营市重点研发项目 (2016YF01) 东营市重点研发项目 (2016YF01)

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This Article

ISSN:0438-1157

CN: 11-1946/TQ

Vol 69, No. 09, Pages 3932-3943+3758

September 2018

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Article Outline

摘要

  • 引言
  • 1 计算模型
  • 2 计算结果及分析
  • 3 结论
  • 符号说明
  • 参考文献