Enhancing Film Stiffness of Spiral Groove Dry Gas Seal via Shape Modification at Low Speed: Numerical Results and Experiment

被引：19
作者：
Jiang, Jinbo [1 ]
Peng, Xudong [1 ]
Zong, Cong [1 ]
Zhao, Wenjing [1 ]
Chen, Yuan [1 ,2 ]
Li, Jiyun [1 ]
机构：
[1] Zhejiang Univ Technol, Minist Educ, Engn Res Ctr Proc Equipment & Its Remfg, Hangzhou, Zhejiang, Peoples R China
[2] China JiLiang Univ, Coll Mech & Elect Engn, Hangzhou, Zhejiang, Peoples R China
来源：
TRIBOLOGY TRANSACTIONS | 2019年 / 62卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Dry gas seal; derived spiral groove; low speed; film stiffness; OPTIMIZATION;
D O I：
10.1080/10402004.2019.1584345
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The film stiffness of dry gas seal must be sufficient to keep gas film stable at high and low speed. A generalized geometric model based on triangles is proposed to characterize spiral grooves. A mathematical model is established and solved using the finite-difference method to obtain steady performance. The optimum spiral grooves for maximum opening force and film stiffness are obtained at low speed, and their steady performance is compared with conventional spiral grooves numerically and experimentally. The pressure and flow field of optimum spiral grooves and conventional spiral grooves are simulated to reveal the mechanism of the performance difference. Results show that through-combined spiral grooves outperform the other derived spiral grooves. Their film stiffness is up to 15% larger than that of conventional spiral grooves at low speed.
引用
收藏
页码：931 / 942
页数：12
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