外加压静压型机械密封均压槽设计对动态性能的影响  

Influence of Equalizing Grooves Design for Externally Pressurized Hydrostatic Mechanical Seal on Dynamic Performance

作　　者：尹源[1] 刘向峰[1] 丛国辉 胡松涛[1] 黄伟峰[1] 李双喜[3] 王磊[3] YIN Yuan LIU Xiang-feng C HU Song-tao HUANG Wei-feng LI Shuang-xi WANG Lei(State Key Laboratory of Tribology,Tsinghua University,Beijing 100084,China Beijing University of Chemical Technology,Beijing 100029,China China Nuclear Power Design Engineering Co. ,Ltd. ,（Shenzhen） ,Shenzhen 518000,China)

机构地区：[1]清华大学摩擦学国家重点实验室,北京100084 [2]深圳中广核工程设计有限公司,广东深圳518000 [3]北京化工大学,北京100029

出　　处：《流体机械》2017年第4期15-21,共7页Fluid Machinery

基　　金：国家重点基础研究计划项目(2012CB026003);国家科技重大专项课题(ZX06901);国家科技支撑计划课题(2015BAA08B02)

摘　　要：外加压静压气体密封在启停等低速运转状态下具有良好的性能,并且便于通过调节气源进行干预。密封在运行过程中会受到非浮动环的窜动和偏摆的影响,故需要良好的追随性以维持密封稳定有效工作。本文采用小扰动法分别计算了采用整周和分区均压槽的外加压静压气体密封的动特性系数,然后进一步计算追随性,并进行了对比。结果表明,采用不同均压槽形式的密封在轴向上的性质差别不大,但相比于采用整周均压槽,采用分区均压槽的静压气体密封具有显著更高的角向直接动刚度、更好的对非浮动环偏摆的追随性。Externally pressurized hydrostatic gas seal show good performance with low speed. Additionally, it can be easily ad-justed by controlling gas source pressure. A good tracing ability keeps a seal away from malfunctioning when affected by misalign-ment and axial runout of non - floating ring. A perturbation method is applied to calculate dynamic coefficients of seal with integral and divided equalizing groove（s） ,and then tracing performance is calculated. The comparison of results between seal employing integral and divided equalizing groove（s） shows that although there is no obvious difference in axial properties, seal with divided equalizing grooves works with significantly higher angular direct dynamic stiffness and traces misalignment of non - floating ring better.

关 键 词：外加压静压气体密封 小扰动法 追随性 

分 类 号：TH136[机械工程—机械制造及自动化]