排灌机械工程学报2017，Vol.35Issue(11)：968-974,7.DOI:10.3969/j.issn.1674-8530.16.0256
基于CFD柱面气膜密封静态力学性能分析
Analysis on steady fluid dynamics of cylindrical gas seal by CFD
摘要
Abstract
In order to explore the effect of groove structure on the sealing performance of a new type cylindrical gas seal,the static pressure distribution,fluid velocity distribution and gas shear stress distribution in the sealing film are analyzed and compared between two structures by using the CFD software.The two structures include ordinary flat and T-groove floating rings.The results demonstrate that a large film pressure variation is found in the circumferential direction in the ordinary fiat floating ring seal,specially,the highest pressure is in the area with the minimum film thickness or vice versa because of the fluid hydrodynamic effect generated by the eccentric rotation of the ring.For the T-groove floating ring,a large film pressure is in the groove and its root,and the maximum pressure is higher than that in the ordinary floating ring film.Because every groove can produce a hydrodynamic effect,the film pressure exhibits several peaks in the circumferential direction,and the number of pressure peaks is equal to the number of grooves.Compared with the ordinary floating ring,the fluid velocity in the T-groove floating ring film is larger than that in the ordinary flat ring film due to even strong hydrodynamic effect generated by the grooves.The maximum shear stress occurs in the range with the minimum film thickness in the ordinary fiat ring film,in the T-groove ring film,however,the maximum shear stress is located at the minimum film thickness and in the dam area of groove root,and its value is larger than the former.关键词
T型槽柱面气膜密封/静压力/流体速度/气膜剪应力Key words
T-groove gas cylinder film seal/static pressure/fluid velocity/gas shear stress分类
农业科技引用本文复制引用
孙军锋,刘美红,李遇贤,苏泽辉,康宇驰..基于CFD柱面气膜密封静态力学性能分析[J].排灌机械工程学报,2017,35(11):968-974,7.基金项目
国家自然科学基金资助项目(51765024) （51765024）
云南省教育厅科学研究基金一般资助项目(2015Y081) （2015Y081）
昆明理工大学分析测试基金资助项目(2016T20100075) （2016T20100075）
