不同槽型柱面气膜密封性能的数值计算研究  

Numerical calculation study on sealing performance of cylindrical spiral groove gas film seal

作　　者：赵星 刘美红[1] 李鑫 许冬伟 ZHAO Xing;LIU Meihong;LI Xin;XU Dongwei(Faculty of Mechanical and Electrical Engineering,Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]昆明理工大学机电工程学院,昆明650500

出　　处：《重庆理工大学学报（自然科学）》2023年第10期334-341,共8页Journal of Chongqing University of Technology：Natural Science

基　　金：国家自然科学基金项目(51765024)。

摘　　要：为了探索柱面螺旋槽模型的密封性能,利用Fluent软件对柱面螺旋槽、T型槽和一字槽3种模型进行了数值模拟计算。在转速、压差以及偏心率3种变工况下,对3种槽型柱面气膜密封进行了研究。研究结果表明:在不同的工况参数和结构参数下,螺旋槽结构的密封效果优于T型槽结构和一字槽结构,且螺旋槽结构动压效应更优。转速、压差对螺旋槽密封性能有较大的影响,偏心率影响较小,当转速在20000~30000 r/min、压差在0.4~0.7 MPa、偏心率在0.5左右时,螺旋槽柱面气膜密封的各项密封性能参数均较好。该研究成果可为柱面气膜密封结构研究与优化提供指导。In order to improve sealing performance of the cylindrical spiral groove model,Fluent software is employed to numerically simulate three models:cylindrical spiral groove,T-groove and slotted groove.Three grooved cylinder air film seals are investigated under three variable working conditions:rotational speed,differential pressure and eccentricity.The results of the study show,under different working conditions and structural parameters,the sealing effect of the spiral groove structure is better than that of the T-groove structure and the slotted structure,and the dynamic pressure effect of the spiral groove structure is superior.Both the rotational speed and pressure difference have a significant influence on the sealing performance of the spiral groove whereas the eccentricity has small impact.When the rotational speed reaches 20000~30000 r/min,the pressure difference is 0.4~0.7 MPa,and the eccentricity is approximately 0.5,all the sealing performance parameters of the spiral groove cylinder air film seal reach comparatively satisfactory levels.This study may provide guidance for the future research and optimization of cylinder gas film sealing structures.

关 键 词：螺旋槽 Fluent仿真 柱面气膜密封 动压效应 密封性能 

分 类 号：TB42[一般工业技术]