化工学报2025，Vol.76Issue(3)：1156-1169,14.DOI:10.11949/0438-1157.20241032
考虑微观表面分层特征密封环接触特性分析
Contact characterization of sealing rings considering microscopic surface delamination features
摘要
Abstract
The sealing rings with soft-hard pairing are extensively applied in the field of rotary dynamic sealing.However,the contact friction between the static and dynamic rings is the main cause of sealing failure.Analyzing the contact characteristics of the seal ring is important for studying the seal friction damage phenomenon and even predicting the stable operation of the seal.Traditional studies are mostly based on the assumption that the micro-surface micro-convexities of the sealing rings satisfy the single-layer characteristic of Gaussian distribution,ignoring the existence of stratification characteristics.This paper,based on the engineering background of dry gas seals,measures the two-dimensional data of the surface topography of the sealing ring,uses the discontinuous separation method to obtain layered parameters,reconstructs the sealing ring in three dimensions using the dual-Gaussian surface simulation theory,studies the contact characteristics of the sealing ring using a deterministic contact model,and analyzes the effects of related length,lower Gaussian roughness,and upper Gaussian proportion on the sealing contact characteristics in combination with surface simulation.The results show that polished finished carbon graphite sealing ring with distinctive stratified characteristic.An increase in the correlation length reduces the number of rough peaks and increases their average radius of curvature.The increase of the upper Gauss ratio leads to a slight increase in the mean curvature radius of the rough peaks.Increasing the lower Gaussian roughness will decrease the average curvature radius of rough peaks,increase the number of rough peaks,and significantly reduce the contact performance.The lower Gaussian roughness has the greatest influence on the surface morphology and contact characteristics,while the correlation length and upper Gaussian ratio have little influence on the contact characteristics.关键词
动密封/表面形貌/分层特征/微尺度/接触Key words
dynamic seal/surface topography/stratified characteristic/microscale/contact分类
机械制造引用本文复制引用
刘孟扬,孙雪剑,毛文元,邓晰文,雷基林..考虑微观表面分层特征密封环接触特性分析[J].化工学报,2025,76(3):1156-1169,14.基金项目
云南省科技计划项目(202302AC08002,202202AB080011) （202302AC08002,202202AB080011）
云南省基础研究计划青年项目(202401AU070183) （202401AU070183）
