中低压干气密封螺旋槽结构参数优化.doc

文档介绍：
中低压干气密封螺旋槽结构参数优化#
彭旭东,江锦波,白少先,李纪云*
(浙江工业大学过程装备及其再制造教育部工程研究中心,杭州 310014)
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摘要:基于完全析因设计方法,开展中低压干气密封螺旋槽结构参数优化。基于气体润滑理
论,对中低压条件下螺旋槽干气密封动压开启力增长率、气膜刚度和刚漏比等密封特性参数
进行分析,获得了中压和低压条件下螺旋槽结构参数的优选值范围,提出“螺旋槽干气密封
特性参数优化带”。结果表明:特性参数优化带能较好地反映螺旋槽干气密封在各压缩数下
的最优性能水平;在中低压高速条件下,当 10°<β<25°,5μm<h<10μm 时能获得较优
的密封性能;当 <αg<4,2<λ<8 时能获得较好的动压效应和轴向气膜稳定性;当 <
αg <,2<λ<5 时能获得较好的综合密封性能。
关键词:螺旋槽; 优化带; 干气密封; 参数优化
中图分类号:TH117
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Structural Parameter Optimization of Spiral Groove Dry
Gas Seal at Medium and Low Pressure
PENG Xudong, JIANG Jinbo, BAI Shaoxian, LI Jiyun
(Engineering Research Center of Process Equipment and Its Re-manufacturing Ministry of
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Education, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China)
Abstract: Based on the method of full factorail design, an optimization of structural parameters of
spiral groove dry gas seal at medium- and low-pressure was carried out. Based on gas lubrication
theory, the sealing characteristic parameters such as increase ratio of hydrodynamic open force,
stiffness and stiffness-leakage ratio of spiral groove dry gas seal at medium- and low-pressure
were analyzed, the preferred value range of structural parameters of spiral groove was obtained,
and a concept of characteristic parameter optimization zone of spiral groove dry gas seal was
presented. Results showed that the maximum sealing pe