摘要
基于气体润滑理论,建立了双向旋转树型槽干式气体端面密封的数学分析模型,对比了双向旋转树型槽与螺旋槽密封端面的压力分布,讨论了树型槽的动压开启特性,以及操作参数对密封特性参数的影响规律。结果表明,双向旋转树型槽干气密封不仅能够实现双向旋转,而且具有较好的动压效应。双向旋转树型槽干气密封的动压效应受压缩数、密封压力等操作参数及端面间气膜厚度的影响显著,压缩数增加,动压开启能力增强;密封压力增加,动压开启能力降低。
Based on gas lubrication theory,analysis model of a bi-direction fir tree groove gas seal is established in this paper. In order to discuss hydrodynamic characteristics of fir tree groove under different operation conditions, numerical analysis was carried out by comparing with a spiral face seal. Numerical results show that bi - direction fir tree groove gas seal presents good dynamic effect, which is affected prominently by operating parameters, e. g. seal number, sealing pressure and clearance. With increasing seal number increased or decreasing sealing pressure ,the hydrodynamics opening ability increases obviously.
出处
《流体机械》
CSCD
北大核心
2012年第1期13-16,5,共5页
Fluid Machinery
基金
国家自然科学基金资助项目(50805130
51175470)
教育部高等学校博士学科点专项科研基金资助课题(20103317110002)
浙江省自然科学杰出青年基金资助(R1090833)
浙江省自然科学基金资助(Y1090620)
关键词
双向旋转树型槽干气密封
压力分布
操作参数
动压特性
bi - direction fir tree groove dry gas seal
pressure distribution
operation conditions
hydrodynamic effect
