引流-泵送槽液体润滑端面密封性能研究  

Study on the sealing performance of liquid lubricated end face seal of inlet-return

作　　者：彭骞 丛国辉 李鲲 张翊勋 郑国运 沈宗沼 PENG Qian;CONG Guohui;LI Kun;ZHANG Yixun;ZHENG Guoyun;SHEN Zongzhao(General Machinery and Key Basic Component Innovation Center(Anhui)Co.,Ltd.,Hefei 230031,China;Institute of Chemical Process Machinery,Zhejiang University of Technology,Hangzhou 310032,China;China Nuclear Power Engineering Co.,Ltd.,Shenzhen 518124,China;General Machinery Research Institute Co.,Ltd.,Hefei 230031,China)

机构地区：[1]通用机械关键核心基础件创新中心(安徽)有限公司,合肥230031 [2]浙江工业大学化工过程机械研究所,杭州310032 [3]中广核工程有限公司,广东深圳518124 [4]合肥通用机械研究院有限公司,合肥230031

出　　处：《流体机械》2024年第9期57-65,共9页Fluid Machinery

基　　金：安徽省重点研究与开发计划项目(2022a05020002)。

摘　　要：为进一步探究机械密封端面组合槽型对密封综合性能的影响规律,建立了基于质量守恒和能量守恒的引流-泵送槽液体端面润滑密封的准三维热流体动力润滑模型,并验证了其准确性,采用SUPG有限单元法对液膜压力、温度以及密封环端面温度进行迭代耦合求解,由此对密封端面状态与密封性能参数影响规律开展分析。通过端面场分析,揭示了引流槽“动力润滑散热”与泵送槽“空化泵送减漏”的作用机理。在p_(s)=1 MPa,n=3000 r/min,h_(0)=1.5μm工况条件下,增加引流槽周向长度,增大泵送径向位置比,调节引流径深比至0.52~0.60,泵送槽周向长度与径向宽度比至(13.5~14.5)/(1~2),引流槽深至4~6μm,泵送槽深至2~3μm,可有效提高密封端面的动压承载、润滑散热能力并减小端面泄漏量。研究结果可为该类密封的设计提供参考。In order to further probe into the influence rules of different combined groove configurations on the comprehensive performance of the mechanical seal,the quasi-three-dimensional thermal-hydrodynamic-lubricated model of the inlet-return groove liquid-face-lubricated seal was established considering mass conservation and energy conservation.Under the premise of validating accuracy of the model,the SUPG finite element method was applied to iteratively coupled solution of the pressure and temperature of liquid film,and the end face temperature of the sealing ring so as to analyze seal face state and the influence rules of sealing performance parameters.Through the analysis of the end face field,the mechanisms of the“hydrodynamic pumping pressurization”of the inlet-groove and the“cavitation dragging reflux”of the return-groove were revealed.Under operating conditions of p_(s)=1 MPa,n=3000 r/min,and h_(0)=1.5μm,the dynamic load-bearing,lubrication and heat dissipation capacity of the seal face are effectively optimized,and the face leakage is effectively suppressed,by increasing the circumferential length of the inlet-groove,enlarging the returning-radial-position ratio,adjusting inlet-diameter-depth ratio to 0.52~0.60 and the ratio of circumferential length and radial width of return-groove to(13.5~14.5)/(1~2),and setting the depth of inlet-groove to 4~6μm and the depth of return-groove to 2~3μm.The research results can provide a reference for the design of this type of seal.

关 键 词：引流槽 泵送槽 端面密封 动力润滑 泄漏量 

分 类 号：TH117.2[机械工程—机械设计及理论]