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首页 Excavator fault exclusion

Excavator fault exclusion.doc

Excavator fault exclusion

行者行走中
2018-04-15 0人阅读 举报 0 0 暂无简介

简介:本文档为《Excavator fault exclusiondoc》,可适用于社会民生领域

ExcavatorfaultexclusionAbstract:thehydraulicsystemisoneofthemostimportantsystemofexcavator,alsoisoneofthemostpronetofaultsystem,thispaper,takingPCtypeexcavatorhydraulicsystemasanexample,tellsthestoryofthehydraulicsystemworkingprincipleandfailurediagnosisandeliminationmethod,fortheexcavatorandothercontainshydraulictransmissionequipmentmaintenanceplayaguidingroleKeywords:thetroubleshootingofexcavatorhydraulicfaultExcavatorontheapplicationofhydraulictransmissionsystemmainlyhasthepilotcontrolhydraulicsystem,rotarywalkinghydraulicsystem,hydraulicsystem,workingdevicehydraulicsystem,etc,ithascompactstructure,flexiblemotion,smoothoperation,theadvantagesofconvenientoperation,thehydraulicsysteminhydraulicoilasthetransfermediumofpower,willleakafterwearing,becauseoftheinternalcomponentsatthesametimeaccompaniedbyoverheating,unabletowork,etcTheemergenceofthehydraulictransmissionfaultissudden,concealment,andcomponentsismoreinvolved,bringcertaindifficultytofailurediagnosisandelimination,sointhemaintenanceofthehydraulicsystem,mustunderstanditsworkingprincipleandcorrectbasedontheanalysisofthecauseoftheproblemtoguaranteethequalityofmaintenanceInthispaper,theprincipleofhydraulictransmissionisintroducedinthispaper,andthediagnosisandeliminationmethodofthecommonfaultphenomenaareanalyzedpcexcavatorhydraulicsystemworkingprinciplePCtypeexcavatorhydraulicsystemiscomposedofsomebasiccircuitandauxiliarycircuit,theyincludeworkingloop,pressurelimitingcircuit,unloading,buffercircuit,throttlingcontrolofmotorspeedandthrottlingspeedloop,walkingspeedloopandtheguidevalvecontrolcircuit,etcItscomponentsworkmainlybythepump,oilpump,pilotcontrolvalve,distributingvalve,safetyvalve,thebigarmoilcylinder,loweroilcylinder,bucketcylinder,fueltankandrelatedpiping,etcPCtypeexcavatorhydraulicsystemintheprocessofwork,thehydraulicoilpumpsuctionfromthebottomofthetankthroughtheoilfilteriswork,fromthepumpoutputhascertainpressureofthehydraulicoilintoasetofparalleldistributingvalveWorkthroughthehandlepilotvalvevalvegrouptoimplementthecorrespondingaction,thesystembythetotalonthetotaloilreliefvalvecapsthetotalpressureofthesystemasawhole,eachworkoilreliefvalverespectivelytooverloadprotectionandoilcompensatingeffecttothecorrespondingoilPcexcavatorhydraulicsystemfailurediagnosisandexclusionThepcexcavator,thepressureofthehydraulicsystemisMPa,lessthanthepressureislowThefailureofthehydraulicsystemmainlymanifestsitselfintwoaspects:theriseofthebigarmisslowandweakTherotationisslowandweakThemaincauseoftwofailuresisthelowpressureonthejob,andthemaincauseoflowstressiscongestionandleakageSealedoilflow,istheguaranteefornormalworkofthesystem,plugandleakisthemostcommonhydraulictransmissionfailure,socheckthehydraulictransmissionfailureusuallystartfromtheaspectsofhydrauliccircuitinspectionThefollowingisthediagnosisandeliminationmethodofdifferentfaultphenomenaofhydraulicsystemThearmliftedslowly,whiletheothermovementswerenormalFaultdiagnosisforInthehydraulicsystem,ifthearmisonlyraisedslowlyandslowly,theturningisnormalFromtheworkingprincipleofthefigureisnothardtosee:otherworkisnormal,thismeansworkingpump,totalsafetyvalveisworking,theyprovidetothepressureofthewholesystemisenough,atthesametime,itshowsthatthepumpinletendlineandtheoilfilter,andtheamountofoil,noproblemofoiltankJustcheckthebigarmslidevalve,thebigarmoilcylinder,thebigarmpartofthetubing,andthesealingpart()checktheoilroadcongestionMakeregularprocessingfirst,removethetubing,removethebigarmslidevalvebody,valvestemandrelatedpartsforcleaning,cleantheoilwayandusecompressedairtoblowdry()checktheoilspillTheleakageofthehydraulicsystemisusuallyproducedafteraperiodoftimeOnthesurface,itiscausedbythefailureofsealingparts,damage,extrusionorsealingsurfaceThemainreasonsare:theoilpollution,impropersealsurfaceroughness,sealinggrooveisunqualified,loosecoupling,withaclearanceincreases,theoiltemperatureistoohigh,andpoorsealingringspoiledorassembly,etcLeakageisdividedintointernalleakageandleakage,usuallycausedbyinternalleakage()thehandlingoftheinternalleakagefailureTheleakinthedepartmentismainlycausedbytheslidingvalveandtheoilcylinderInternalleakageoccursmainlyinbodyandoilcylinder,noteasytocheckButwecanusesomehelpermethodstodeterminetheleak()examinationofthelargearmoiltankWhenthepistonofthelargearmcylinderreceivesthebottom,removetherodwithouttherod,makethebigarmoilcylinderhavetherodcavitytocontinuefillingtheoilIfthereisalargeamountofoilleakingoutofthepipe,itindicatesthatthehydrauliccylinderisleakingYoucanalsofillthebucketwithloads,liftuptothelimit,Thebigarmjoystickisplacedinthemiddle,andtheengineisoutofthefire,andthespeedofthebigarmisobservedThentheleveroftheleverisplacedinahigherposition,andifthebigarmsinkssignificantlyfaster,italsoshowsthattheleakoccursinthehydrauliccylinderIftherateofsubsidenceisnotnoticeable,theinternalleakageiscausedbythelargearmslidevalve

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