井下纠斜液压缸密封性能研究液压气动与密封/2024年第3期doi:10.3969/j.issn.1008-0813.2024.03.006摘要：为提高纠斜液压缸的密封性能,设计了两种组合密封圈，研究其在不同液压油压力及液压油与泥浆压差下的等效应力、接触应力和摩擦力,并进行模拟实验。结果表明：随着钻探深度的增加，YR和WR形密封圈的最大等效应力、最大接触应力和摩擦力逐渐增大,但YR形密封圈的数值相对较小,接触应力分布相对均匀;压力补偿油箱内外压差对密封圈的性能影响较小,设计使用中可忽略；YR形密封圈的密封性能相对较好。关键词：井下；纠斜液压缸；组合密封圈；密封性能中图分类号：TB42;TH137SealingPerformanceofHydraulicCylinderforWeepWellDeviationCorrection(1.SchoolofMechanicalAutomation,WuhanUniversityofScienceandTechnology,Wuhan430081,China;2.SuzhouManfuryAdvancedMaterialsCo.,Ltd.,Suzhou215515,China)Abstract:Toenhancethesealingperformanceofthehydrauliccylinder,therearedesigntwotypesofcombinedsealingrings.Theseringswereexaminedundervarioushydraulicoilpressuresandpressuredifferencesbetweenthehydraulicoilandmud,andsimulationexperimentswereconducted.Thefindingsindicatethatasthedrillingdepthincreases,theWRandYRsealsexperienceagradualriseinmaximumequivalentstress,maximumcontactstress,andfriction.However,theYRsealsdemonstraterelativelysmallervalues,alongwithamoreuniformdistributionofcontactstress.Theimpactofpressuredifferencebetweentheinternalandexternalcompartmentsofthepressurecompensationtankonthesealring'sperformanceisnegligibleandcanbedisregardedduringdesignandusage.Overall,theYRsealingringexhibitscomparativelysuperiorsealingperformance.Keywords:deepwell;rectifyinghydrauliccylinder;combinedsealring;performanceofsealing0引言自动垂直钻井系统（VerticalDrillingSystem，VDS）是一种自动检测并调整钻头方位角和倾斜角，能够确保井眼轨迹按照设计方向钻探的机-电-液集成装置"。纠斜液压缸是自动垂直钻井系统的核心执行机构,通过活塞杆伸缩驱动推力块，作用于井壁，纠斜装置从井壁获得反作用力，来调整钻头的姿态，从而实现井眼轨迹控制。井下工况复杂，存在高压、高温、强震和强污染，纠斜液压缸活塞杆外伸端密封直接与泥浆接触，工程实践中常因该密封失效，进而引起自动垂...
