化工学报2025，Vol.76Issue(12)：6508-6526,19.DOI:10.11949/0438-1157.20250737
基于3D分形端面表征的机械密封启停阶段摩擦磨损特性研究
Research on friction and wear characteristics of mechanical seals in start-stop phases based on 3D fractal end-face characterization
摘要
Abstract
To address seal failure caused by face contact during start-stop phases of non-contact mechanical seals under unstable operating conditions,a fluid-solid-thermal-wear coupled model was established based on the 3D fractal characterization of micro-asperities and Archard's adhesive wear theory.The model calculates wear rate and volume of the seal faces,and its accuracy was validated experimentally.A systematic analysis was conducted on how operating pressure,temperature,rotational speed,and spiral groove structural parameters during the start-stop phase influence the contact characteristics,thermal behavior,and frictional wear of the seal faces.The results show that rotational speed and pressure significantly affect wear,while temperature influences it indirectly via thermal deformation of the seal rings.Lowering the operating pressure and temperature during the start-stop phase,starting and stopping at speeds greater than 1500 r·min1,and adjusting the speed in increments greater than 1000 r·min-1 all help reduce friction and wear during the start-stop phase of the friction pair.Considering both start-stop and steady-state performance,the optimal spiral groove parameters are:dam ratio 0.7-0.8,weir ratio 0.4-0.6,spiral angle 16°—18°,10-12 grooves,and groove depth of 6-8 μm.关键词
机械密封/启停特性/磨损/分形/流体力学Key words
mechanical seal/start-stop characteristics/attrition/fractals/fluid mechanics分类
机械制造引用本文复制引用
陈凯放,李双喜,毕恩哲,孙宇辉,田举鹏,王磊..基于3D分形端面表征的机械密封启停阶段摩擦磨损特性研究[J].化工学报,2025,76(12):6508-6526,19.基金项目
国家重点研发计划项目(2024YFB3410500) （2024YFB3410500）
