Elastic-plastic contact stiffness model of dry gas seal friction interface

被引：0
|
作者：
Zhai X. [1 ]
Yang X. [1 ]
Chen J. [1 ]
Ding X. [1 ]
机构：
[1] School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2023年 / 42卷 / 10期
关键词：
contact model; contact stiffness; dry gas seal; elastic-plastic stage; statistical theory;
D O I：
10.13465/j.cnki.jvs.2023.10.020
中图分类号：
学科分类号：
摘要：
Considering the complex and changeable elastoplastic deformation stage of the dry gas seal friction interface, based on the characteristics of the asperities satisfying continuity, smoothness and monotonicity in the whole deformation process, the cosine function was used to explore the relationship between the contact surface deformation and the contact characteristics. Then, based on the statistical theory, the overall contact model of the friction interface was established. Finally, the established model was compared with the GW model, CEB model, ZMC model, KE model. Compared with the five classic models of the Li model, the mechanical properties and influencing factors of the dry gas seal friction interface were obtained through theoretical analysis and numerical solution. The results show that the model in this paper realizes the continuity,smoothness and monotonicity of the asperity in all stages of deformation ; the contact load,contact area and contact stiffness are positively related to the dimensionless contact deformation; and negative related to the average contact distance of the dimensionless surface. The smaller the average contact distance of the dimensionless surface is, the greater the proportion of plastic deformation of the rough surface is; in order to make the dry gas seal moving ring and static ring operate more reliably and smoothly,the contact surface between the moving ring and the static ring should be as smooth and flat as possible, so that the average contact distance of the dimensionless surface is below 2. 5. © 2023 Chinese Vibration Engineering Society. All rights reserved.
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页码：165 / 171
页数：6
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