文章编号：1671-7872(2023)02-0144-07表面织构底部构形对液体润滑机械密封性能的影响史俊1a,1b,2，陈小亚1a,1b,2，李蒙1a,1b，王涛1a,1b，时礼平1a,1b,2(1.安徽工业大学a.机械工程学院，b.先进金属材料绿色制备与表面技术教育部重点实验室，安徽马鞍山243032；2.安徽工业大学芜湖技术创新研究院,安徽芜湖241002)摘要：表面织构负压区“空化”行为严重影响织构化密封端面整体密封性能。采用激光加工技术在碳化硅密封环端面制备出平底、左倾斜、右倾斜等3种底部形状的正方形凹坑织构，通过自主搭建的高速密封试验机开展试验，研究不同转速和轴向载荷条件下底部构形对端面摩擦系数、泄漏量及温度等密封性能参数的影响；利用Fluent17.0软件模拟分析3种底部构形截面的压力和流线分布。结果表明：随转速及轴向载荷的增大，底部左倾斜织构能显著减小端面摩擦系数和抑制泄漏，降低密封端面热量，有效改善机械密封性能；轴向载荷为110~140N，转速在7000r/min时，底面左倾斜织构可获得最佳的综合密封性能；底部左倾斜织构入口处的负压区面积显著减小，流体介质的“空化”行为得到有效抑制，织构区域内流线复杂而紊乱，回流更强烈，流体微动压效应更明显。关键词：织构底部构形；机械密封；流体动压；密封性能中图分类号：TH117.2文献标志码：Adoi：10.12415/j.issn.1671−7872.22314EffectofBottomConfigurationofSurfaceTextureonPerformanceofLiquidLubricatedMechanicalSealsSHIJun1a,1b,2,CHENXiaoya1a,1b,2,LIMeng1a,1b,WANGTao1a,1b,SHILiping1a,1b,2(1.a.SchoolofMechanicalEngineering,b.KeyLaboratoryofGreenPreparationandSurfaceTechnologyofAdvancedMetalMaterials,MinistryofEducation,AnhuiUniversityofTechnology,Maanshan243032,China;2.WuhuInstituteofTechnologyInnovation,AnhuiUniversityofTechnology,Wuhu241002,China)Abstract：The“cavitation”behaviorinthenegativepressureareaofthesurfacetextureseriouslyaffectstheoverallsealingperformanceofthetexturedsealface.Threesquarepittextureswithflatbottom,lefttiltandrighttilt,werepreparedontheendfaceofsiliconcarbidesealingringbylaserprocessingtechnology.Theeffectsofthebottomconfigurationsonsealingperformanceparameterssuchasendfrictioncoefficient,leakageandtemperatureandotherunderdifferentrotationalspeedsandaxialloadswerestudiedbyusingtheself-develop...
