2022 年 2 月
第 43 卷 第 2 期
推 进 技 术
JOURNA L O F PRO PU L S ION TECHNO LOGY
Feb. 2022
Vol.43 No.2
200587-1
环瓣式浮环密封表面瑞利台阶型槽气体
润滑动压特性 *
仰宏伟,白少先
(浙江工业大学 机械工程学院,浙江 杭州 310032)
摘 要:为提高密封气膜的开启能力以满足长寿命设计要求,基于气体润滑理论研究了环瓣式浮环
密封表面瑞利台阶型槽的动压特性。采用有限差分方法,数值计算了密封气膜压力分布和动压效应,分
析了操作参数和型槽几何参数对密封气膜压力和泄漏率的影响规律。结果表明,表面瑞利台阶型槽可以
产生明显的气体润滑动压效应,可使得密封气膜平均压力和泄漏率分别增加38.6%和10.3%;型槽几何
参数对动压效应影响明显,槽宽、槽数和槽深的增加均可使气膜平均压力增加;随着槽宽和槽数半径比
的增加,无量纲平均压力先增加后减小。
关键词:环瓣式浮环密封;气体润滑;瑞利台阶型槽;动压特性;型槽参数
中图分类号:TH117.2 文献标识码:A 文章编号:1001-4055(2022)02-200587-07
DOI:10.13675/j.cnki. tjjs. 200587
Gas Hydrodynamic Lubrication Performance of Split
Floating Ring Seals with Rayleigh Step Grooves
YANG Hong-wei,BAI Shao-xian
(College of Mechanical Engineering,Zhejiang University of Technology,Hangzhou 310032,China)
Abstract:In order to improve the opening capacity of seal gas film and meet the requirements of long life
design of split floating ring seals,the hydrodynamic effect of Rayleigh step groove was studied based on gas lubri⁃
cation theory. The pressure distribution and dynamic pressure effect of seal gas film were numerically calculated
by finite difference method. Meanwhile,the effects of operation parameters and groove geometry parameters on
film pressure and leakage rate were analyzed. The numerical results show that the surface Rayleigh step groove
can produce obvious gas hydrodynamic effect,which can make the mean pressure and leakage rate increase by
38.6% and 10.3%,respectively. The groove geometric parameters present significant influence on the hydrody⁃
namic effect,the mean gas film pressure increases with the increase of groove width,groove number and groove
depth. Besides,with the increase of groove width and groove number radius ratio,the dimensionless mean pres⁃
sure increases first and then decreases.
Key words: Split floating ring seal; Gas lubrication; Rayleigh step groove; Hydrodynamic effect;
Groove parameters
* 收稿日期:2020-08-07;修订日期:2020-11-18。
基金项目:国家自然科学基金(51775504)。
作者简介:仰宏伟,硕士生,研究领域为发动机密封。
通讯作者:白少先,博士,研究员,研究领域为发动机密封。
引用格式:仰宏伟,白少先 . 环瓣式浮环密封表面瑞利台阶型槽气体润滑动压特性[J]. 推进技术,2022,43(2):200587.
(YANG Hong-wei,BAI Shao-xian. Gas Hydrodynamic Lubrication Performance of Split Floating Ring Seals with
Rayleigh Step Grooves[J]. Journal of Propulsion Technology,2022,43(2):200587.)