工程机械液压缸内外泄漏模拟实验.pdf

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1、机床与液压Jun．2012HydromechatronicsEngineeringVo1．40No．12DOI：10．3969／j．issn．1001-3881．2012．12．002ExperimentalResearchonInternalandExternalLeakageofConstructionMachineryHydraulicCylinderLIYang，WANGLong，JIANGJihaiI．SchoolofMechatronicsEngineering，HarbinInstituteofTechnology，Harbin150001，China；2．H

2、arbinGenericHydraulicMachineryManufacturingCompany，Harbin150001，ChinaAbstract：InternalandexternalleakageisanimpoRantfactorofconstructionmachineryhydrauliccylinderreliability．Aimingatobtainingthefaultcriterionofinternalandexternalleakageforcon·structionmachineryhydrauliccylinder，thispaperin

3、troducesanexperimentalresearchmethodbymonitoringpressureanddisplacementsignalofconstructionmachineryhydrauliccylinder．Throughexperimentsunderdiferentorificesizeofleakage，diferentpressureofsystem，difer-entflowofsystem，anddiferentload，anefectivebasisisprovidedforfaultdiagnosisofcon-struction

4、machineryhydrauliccylinderinternalandextemalleakage，whichwillhavepracticalen-gineeringsignificance．Keywords：hydrauliccomponents’reliability，constructionmachineryhydrauliccylinder，internalandexternalleakage，faultdiagnosisSofaultdetection，diagnosisandforecasttechnology1．Introductionhavebecom

5、ethelastdefenselinetosecuretherelia．bilityandsecurityofhydrauliccomponents[2]．Inrecentyears，withtheacceleratingpaceofHydrauliccylinderisONeofthemostimportantourcountry’sinfrastructure，theconstructionma-componentsofconstructionmachineryhydraulicsys—chineryindustrygetsrapiddevelopment，andith

6、astem，soitsreliabilitywillaffecttheoperationofthebecomethelargestmarketofhydrauliccomponentssowholemachinedirectly．Beforethefaultofhydraulicfar[1]．Atthesametime，thecomplexity，scaleandcylinder，itskeyperformanceparameters(suchasinvestmentofconstructionmachineryhydraulicsys—pressure，flowandte

7、mperature)willbeabnormal，temareincreasingrapidIywiththedevelopmentofbuteffectivemeasurestopreventthefaultstillcannotmodemhydraulictechnology，soit’seagertoim—betakensincethoseabnormalitiesarenoteasytobeprovethereliabilityandsecurityofhydraulicsystem．foundbymani