狭缝节流静压干气密封稳态性能数值模拟  

Numerical Simulation of the Steady Characteristics for Aerostatic Dry Gas Seal with Slit Restrictor

作　　者：任俊杰 许恒杰[1] 宋鹏云[1] REN Junjie;XU Hengjie;SONG Pengyun(Faculty of Chemical Engineering,Kunming University of Science and Technology,Kunming Yunnan 650500,China)

机构地区：[1]昆明理工大学化学工程学院,云南昆明650500

出　　处：《润滑与密封》2023年第8期65-71,共7页Lubrication Engineering

基　　金：国家自然科学基金项目(52105189);云南省基础研究专项青年项目(202101AU070019);昆明理工大学校级人培基金项目(KKZ3202005059)。

摘　　要：为进一步优化提升静压干气密封的气膜开启能力,将狭缝节流器与静压干气密封相结合,设计狭缝节流静压干气密封,采用Fluent软件探究狭缝节流器结构参数和布列方式对干气密封性能的影响。结果表明:与经典小孔节流静压干气密封相比,相同节流面积下狭缝节流静压干气密封具有更高的气膜开启力;狭缝、均压槽周径比对静压干气密封气膜开启力的影响相互独立,存在最佳的周径比使得气膜开启力最大;在径向宽度一定的前提下,均压槽的平面空间越充裕,密封间隙内的气膜高压区范围越广、压力均布效果越好;狭缝沿径向、周向的列数增加均能提升气膜开启力;与周向连续狭缝布列相比,非连续性狭缝布列会导致更高的开启力。To optimize the opening ability of gas film of dry gas seal,the aerostatic dry gas seal with slit restrictor was designed by combining the slit restrictor with aerostatic dry gas seal.The influence of the structural parameters and arrangement of slit restrictors on dry gas sealing performance was investigated by Fluent software.The results show that the slit throttling aerostatic dry gas seal has a higher opening force than the classic orifice aerostatic dry gas seal on the premise of same throttling area.The influence of slit circumference-radial length ratio on the opening force is independent of equalizing groove circumference-radial length ratio,there is an optimal circumference ratio that maximizes the opening force of the gas film.Under the premise of a certain radial width,the more abundant the plane space of the equalizing groove,the wider the range of the gas film high-pressure zone within the sealing gap,and the better the pressure distribution effect.The opening force grows as the radial and circumferential column number of slit increases.Compared to circumferential continuous slit arrangement,the discontinuous slit arrangement results in higher opening force.

关 键 词：静压干气密封 狭缝节流 稳态性能 气膜开启力 

分 类 号：TB42[一般工业技术]