槽内有序造型微孔对端面干气密封稳态性能的影响  

Effects of Ordered Micro-holes in the Groove on the Steady-state Performance of End Face Dry Gas Seal

作　　者：江安迪 丁雪兴[1] 王世鹏 丁俊华 张兰霞 JIANG Andi;DING Xuexing;WANG Shipeng;DING Junhua;ZHANG Lanxia(College of Petrochemical Engineering,Lanzhou University of Technology,Lanzhou Gansu 730050,China)

机构地区：[1]兰州理工大学石油化工学院,甘肃兰州730050

出　　处：《润滑与密封》2025年第2期30-40,共11页Lubrication Engineering

基　　金：国家自然科学基金项目(51565029);宁波市重大专项(2020Z112)。

摘　　要：为实现更加有效的密封效果,满足现代工业对端面干气密封的适应性要求,提出一种槽内开设有序造型微孔的干气密封端面结构,包括沿螺旋槽底开设单列3孔和4孔、沿螺旋槽底开设双列6孔和8孔。构建4种类菱形微孔-螺旋槽密封槽型的几何模型,利用商用软件Fluent对各种复合槽型端面流场压力分布进行仿真计算,考察工况参数和关键几何参数对稳态密封性能的影响。结果表明:4种类菱形微孔-螺旋槽复合槽型均具有显著的流体动压效应,在相同的工况参数下,采用在螺旋槽底开设单列3个微孔的槽型结构具有最好的开启性能;转速、压力和螺旋角的增大均可提高开启力,随着微孔深度的增加,复合槽型的开启力呈现先增大后减小的趋势,最优的微孔深度为3μm;随着转速、压力、螺旋角和微孔深度的增加泄漏率呈现增大趋势。研究结果为开发新槽型以及优化密封结构提供理论参考。In order to achieve more effective sealing effect and fulfill the adaptability requirements of modern industry for end face dry gas seals,a dry gas seal face structure with ordered shaped micro-holes in the groove was proposed,including the structures of single row 3-hole or 4-hole,double row of 6-hole or 8-hole at the bottom of the spiral groove.The geometrical models of four types of rhomboid microporous-spiral groove seals were constructed,and the pressure distribution within the end-face flow field of various composite groove seals was simulated using the commercial software Fluent.The impact of operating conditions and key geometric parameters on the steady-state sealing performance was studied.The results show that the four types of rhomboid microporous-spiral groove seals possess a significant hydrodynamic pressure effect.Under the same working parameters,the groove structure with single row of 3-hole at the bottom of the spiral groove has the best opening performance.The increase of rotation speed,pressure,and spiral angle can all improve the opening force.With an increase in the depth of the microholes,the opening force of the composite groove shows a trend of first increasing and then decreasing,and the optimal micropore depth is 3μm.As the speed,pressure,spiral angle,and micro-hole depth increase,the leakage shows an increasing trend.The research findings provide theoretical reference for the development of novel grooves and the optimization of sealing structures.

关 键 词：干气密封 复合型织构 有序造型微孔 动压效应 稳态特性 

分 类 号：TH117.2[机械工程—机械设计及理论]