Test Technology and Experiment Research of Performance Parameters for Spiral Groove Dry Gas Seal

2012 ◽  
Vol 48 (19) ◽  
pp. 116
Author(s):  
Shurong YU
Keyword(s):  
Performance Parameters ◽  
Spiral Groove ◽  
Experiment Research ◽  
Dry Gas Seal ◽  
Test Technology

Performance Analyses of the Spiral Groove Dry Gas Seal with Inner Annular Groove

2013 ◽  
Vol 420 ◽  
pp. 51-55 ◽  
Author(s):  
Ying Li ◽  
Peng Yun Song ◽  
Heng Jie Xu
Keyword(s):  
Pressure Control ◽  
Operating Conditions ◽  
Performance Parameters ◽  
Spiral Groove ◽  
Dry Gas Seal ◽  
Sealing Performance ◽  
The Common ◽  
The Difference ◽  
Film Stiffness ◽  
The Given

In order to improve the performance of the spiral groove dry gas seal (S-DGS), the spiral groove dry gas seal with an inner annular groove (AS-DGS) was invented. Based on the narrow groove theory, the sealing performance parameters of the AS-DGS were gained by using approximate analytical method to solve the gas film pressure control equations, and the results were compared with those of the common S-DGS. The results show that, in the given operating conditions, the opening force of AS-DGS is smaller than that of the S-DGS with the difference less than 0.5%, and the film stiffness is larger than that of the common S-DGS with the difference less than 5% in the case of low-speed or high-pressure operation, but the leakage is a little larger.

The influence of 3-DOF film thickness disturbance on transient performance of typical spiral groove dry gas seals

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Yuan Chen ◽  
Hao Shang ◽  
Xiaolu Li ◽  
Yuntang Li ◽  
Bingqing Wang ◽  
...  
Keyword(s):  
Film Thickness ◽  
Degrees Of Freedom ◽  
Thickness Distribution ◽  
Transient Performance ◽  
Spiral Groove ◽  
Double Row ◽  
Content Type ◽  
Dry Gas Seal ◽  
Sealing Performance ◽  
Gas Seals

Purpose The purpose of this paper is to investigate the influence rule and mechanism of three degrees of freedom film thickness disturbance on the transient performance of spiral groove, upstream pumping spiral groove dry gas seal (UP-SDGS) and double-row spiral groove dry gas seal (DR-SDGS). Design/methodology/approach The transient performance of spiral groove, UP-SDGS and DR-SDGS are obtained by solving the transient Reynolds equation under different axial and angular disturbance coefficients. The transient and steady performance of the above-mentioned DGSs are compared and analyzed. Findings The film thickness disturbance has a remarkable impact on the sealing performance of DGS with different structures and the calculation deviations of the leakage rate of the UP-DGS will increase significantly if the film thickness disturbance is ignored. The axial and angular disturbance jointly affect the film thickness distribution of DGS, but there is no significant interaction between them on the transient sealing performance. Originality/value The influence mechanism of axial disturbance and angular disturbance on the transient performance of typical SDGSs behavior has been explained by theory. Considering small and large disturbance, the interaction between axial disturbance and angular disturbance on the transient performance have been studied.

The performance of spiral groove dry gas seal under choked flow condition considering the real gas effect

2019 ◽  
Vol 234 (4) ◽  
pp. 554-566
Author(s):  
Hengjie Xu ◽  
Pengyun Song ◽  
Wenyuan Mao ◽  
Qiangguo Deng
Keyword(s):  
Carbon Dioxide ◽  
Flow Condition ◽  
Ideal Gas ◽  
Leakage Rate ◽  
Spiral Groove ◽  
Real Gas ◽  
Dry Gas Seal ◽  
Choked Flow ◽  
Real Gas Effect ◽  
Gas Effect

By taking carbon dioxide and hydrogen as lubricating gas, respectively, this paper presents an analysis on the pressure characteristics and temperature distribution of spiral groove dry gas seal which influenced by real gas effect under choked flow condition. Numerical results show that the deviation between real gas and ideal gas, which expressed by the deviation degree between compressibility factor Z and 1, is the main reason for real gas effect affecting sealing performance. Compared with ideal gas model, real gas effect raises exit pressure, opening force, leakage rate, Mach number in dam region, and temperature for carbon dioxide ( Z < 1), while it decreases those characteristics for hydrogen ( Z > 1) under the same operating conditions. In addition, choked flow effect increases opening force and reduces leakage rate and temperature-drop between entrance and exit of sealing clearance. Meanwhile, it may cause an unstable behavior for the seal.

Dynamic coupling correlation of gas film in dry gas seal with spiral groove

2014 ◽  
Vol 27 (4) ◽  
pp. 853-859 ◽  
Author(s):  
Zhengxian Liu ◽  
Musu Wang ◽  
Yue Zhou ◽  
Ningning Wu
Keyword(s):  
Dynamic Coupling ◽  
Spiral Groove ◽  
Dry Gas Seal ◽  
Coupling Correlation

Flow dynamics of a spiral-groove dry-gas seal

2013 ◽  
Vol 26 (1) ◽  
pp. 78-84 ◽  
Author(s):  
Bing Wang ◽  
Huiqiang Zhang ◽  
Hongjun Cao
Keyword(s):  
Flow Dynamics ◽  
Spiral Groove ◽  
Dry Gas Seal

The Experiment Research of High-Pressure Air Blowing Ballast Tanks

2013 ◽  
Vol 411-414 ◽  
pp. 3010-3015
Author(s):  
Rui Jie Liu ◽  
Chang Run Xiao ◽  
Yi Han Liu
Keyword(s):  
Mathematical Model ◽  
High Pressure ◽  
Performance Parameters ◽  
Experiment Research ◽  
Air Blowing ◽  
Ballast Tanks ◽  
The Mathematical Model

In order to test and verify the accuracy and reasonable of the mathematical model of the high-pressure air blowing the main ballast tanks, the paper design a submarine self-propelled model with the system of high-pressure air blowing the ballast tanks.Through the experiment without propulsion , the paper obtains drainage performance and key performance parameters of motion.Through the comparing of CFD, the result shows the ability to describe correctly the process of high-pressure air blowing ballast tanks.

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