带式输送机的典型故障分析与处理外文文献翻译.docx
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带式输送机的典型故障分析与处理外文文献翻译.docx
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带式输送机的典型故障分析与处理外文文献翻译
附录A
Typicalfailureanalysisandprocessingofbeltconveyor
LihuaZHAO,YinLIN
SchoolofMechanicalEngineering,NortheastDianliUniversity,JilinCity,JilinProvinceChangchunRoad169,132012,China
Abstract:
Thepaperanalyzestwotypicalfailureformsofrollerandconveyoratthebeltconveyor,anddescribesthemaintenancemethodsofpreventionandeliminationfailurestoensurethenormaloperationofbeltconveyor.
Keywords:
belt-conveyor,fault,deviation,service.
1.Introduction:
Beltconveyorisacommonlyusedequipmentofcontinuoustransport,ithasahighefficiencyandlargeconveyingcapacity,simplerconstruction,smallamountofmaintenance.Canbeachievedatdifferentdistances,differentmaterialstransportation.Itisswidelyusedinmining,coalhandlingsysteminthermalpowerplantandotherprojects.Beltconveyorwilloftenoccursometypicalproblemsinthecourse,thispaperBasedonresearchcommontypicalfailureofbeltconveyorduringuse,analysisthecauseoffailure,proposedsomeeffectivemethodstosolvetheproblem.
2.Typicalfaultsofconveyorbelt:
2.1.Conveyorbeltdeviation
Inthebeltconveyor,astheconveyorbeltistractioncomponents,transmitpowerandmotion,alsoiscarryingcomponents,supportmaterialload.Workingmorecomplex,soatworkoftenhappenbeltdeviation.Deviationistheconveyorbeltduringoperation,thecenterlineofbeltdeviationthecenterlineofconveyor.Astheconveyorbeltdeviationmaycausebetweenthebeltedgeandrackwear,causebeltedgeprematuredamage,Rangingimpactthelifeofconveyors,affectthethroughputofmaterials,Weightiscausedbywithdrawalmaterial,evenhappenstopoccurrence,directimpactonproduction.Astheconveyorbeltismoreimportant,themostexpensiveparts.Itspriceabout25%~50%totheconveyor.Soanalysisthereasonsofbeltdeviation,reduceandeliminatebeltdeviation,Itisanimportantpartofensurebelttowork,extendequipmentlife.Causethebeltoccursdeviationbecauseofthefollowingfactors.
2.1.1.Inthedeviceitself
a.Rackrigidispoor,largedeformationunderload,causingthebeltdeviation.
b.Thelargererrorofrolleroutercylindrical,causeddeviationwhentheconveyorbeltrunning.
c.Thesupportingrollerrotationisnotflexible,causestheconveyorbeltbothsidesstresstobeuneven,causestheconveyorbeltdeviation.
d.Theparallelismerrorcylindricalaxisandrolleraxisistoobig,causestheconveyorbeltdeviation.
e.Conveyorbeltitselfisquestionablequality,thinandthickuneven,causedashockleadrunningconveyorbeltdeviation.
f.Conveyorbeltmanufacturingqualityhavedefects,thelengthofbeltbothsidesedgeisinconsistent,causerunningconveyorbeltdeviation.
g.Notparallelwithbeltconnector,connectionerroristoobig,causebeltdeviation.
2.1.2.Installationadjustment
a.Drive,changerolleraxisandconveyorcenterlineverticalerroristoobig,makeconveyorandhorizontallinehaveabigrinclination,causebeltdeviation.
b.Rolleraxisandconveyorcenterlineverticalerrorisbig,willcausebeltdeviationalso.
c.Theconnectionstrengthbetweenrackandgroundisnotenough,therackunstable,causingbeltdeviation.
d.Thefeedingplateofdischargetroughandimproperlylocated,bothsidesoftheconveyorbeltunevenforcecausebeltdeviation.
2.1.3.Withmaintenance
a.Thecleaningperformanceofsweeperispoor,maketherollercylindricaldiameterlocalincreases.
b.Feedingmouthlocationiswrong,sothatthematerialpartialloadontheconveyorbelt,causebeltdeviation.
c.Poormaintenanceandimproperadjustment,resultingintheconveyorbeltdeviation.
d.Forthesteelcordbelt,asthemanufactureofsteelcordisunevenforce,sothatadeviationoccursintheoperation,orastrongdifferenceofbelt,largeelongationunderload,causingthevibration,thebeltwilldeviation.
e.Also,thevibrationofrunningconveyorbeltsystemcancausethedeviation.
f.Inaddition,whenconveyingsomeviscousmaterial,maketheroller,etc.bondingmaterials,makethecylindricaldiameterofrollerpartincreases,causingbeltdeviation.
2.2.Measurestopreventthebeltdeviation
2.2.1.Duetoequipmentinthemanufactureofconveyorbeltcausesthedeviation,primarilythroughimproveddesign,manufactureprecisiontopreventandreducetheoccurrenceofconveyorbeltdeviation.
2.2.2.Forinstallationadjustimproperanddailyusecausesdeviation,mainlythefollowingaspectsshouldbeconsidered:
Conveyorbeltindriverolleroronrearrollersdeviation,usuallybyadjustingthepositionoftherollerbearingwaystoeliminate,usuallybyadjustingthepositionoftherollerbearingwaystoeliminate.
A.Thelongitudinalcenterlineoftherollerrotationaxisandconveyorisnotperpendicular,resultingintheconveyorbeltonesidelooseandtheothertight,beltmovefromthetightsidetothelooseside,Occursdeviationphenomenon.Shouldbeadjustedbearingpositionofthetightendeviationside.Makehorizontalpullofbeltequal,eliminatedeviation.Whentailrollerisspiraltensioning,thereasonsoftaildeviationmaybeduetothetoptightpoweroftensioningdevicebothsidesscrewrodarenotequal,resultingincausedbyimbalance.
B.Cylinderaxisisnothorizontal,atbothendsbearingoftheheightdifferenceiscauseanotherreasonofheadortaildeviation.Atthispoint,atbothendsrollerbearingshouldaddandsubtractshimswaytolevelingrolleraxis,toeliminateconveyorbeltdeviation.
C.Rollersurfaceadhesionmaterial,equivalenttoincreasingtherollerlocalrdiameter,willcausetheconveyorbeltdeviation,shouldstrengthenemptysegmentcleaningofconveyorbelttoreducetheadhesivematerialordustaccumulationontheconveyorbelt.Inaddition,theconveyorbeltbetweenthenoseandtailpartsdeviation,calledcentralorlocaldeviation.Suchdeviationreasonsismorecomplex,itiswiththeconveyorbeltalongdeviceexposuretoarelationship.Needadetailedanalysisforspecificissues.Usingthefollowingmethodscanresolvetheseissues.
a.Loadorno-loadbranchrolleraxiswiththeconveyorbeltrunningcenterlineisnotperpendicular,causingtapeattherollerdeviation.Deviationendsshouldadjustmenttotheconveyorbeltrunningdirection.Atthistimeoftenneedtoadjusttheadjacentgroupsofrollersinordertoachievethepurposeofeliminatingdeviation,adjustingdeviationangleshouldnotbetoobig.
b.Conveyorbeltjointwiththetapecenterline(trumpet)isnotperpendicular,tocausethedeviation,Shouldimprovedinstallationconnectionaccuracytoeliminatedeviation.
c.Ifmaterialloadedontheconveyorbeltisstraight;makethematerialblockandweightdistributionalongbandwidthdirectiondistributionseriousinequality,causedeviation,throughadjustmentblankingtubeandskirtplatelocationmethodtobeeliminated.
D.Recently,itwassuggestedthatthemethodofapplicationfilmfortransferpartialconveyorbelt,becauseofhighmanufacturingcostsandsometechnicalproblemsnotwellsolved,makesthismethodverydifficulttopromotetheuse.
3.Thetypicalfailureofroller:
3.1.Operationisnotflexible
Eachbeltconveyorhavelotnumberrollers,installationshowninPicture1,theirworkstatusdirectlyaffectstheconveyorisworking.Accordingtotheactualworkofconveyor,rollerintheconveyorsystemcanbeclassifiedfourkindsaccordingtheirefect,troughroller,parallelroller,bufferrollerandself-aligningroller;accordingtotheloadscasecanbedividedtwokinds,no-loadrollerandbearingroller.Troughrollerusebearingbranchesofmaterials,playasupportingroleandincreasedthroughputrole.
Parallelrollerisalong-shapedroller,forno-loadbranchofconveyor,toplayasupportingroleofno-loadbranchtape;bufferrolleristroughrollertoo.Flexiblesupporttroughrollerbeinstalledonconveyorloadbranch,Installedinthematerialoffice.Reducetheimpactofmaterialforconveyorbelt,protectthetapeandsupportbearing.Generallybasedontheelasticsupportweredividedintorubberringandspringplate;theroleofself-aligningrollerisacertaindegreeofautomaticadjustmentofconveyorbeltdeviation,Toavoidexcessivewearofbeltandmaterialsscattered.Intheloadandno-loadbranchareequippedwithanumberofself-aligningroller.Theself-aligningprincipleshowninFig.2.
Manufactureinstallationqualityofrollerdirectlyaffectthelifeandrunningresistanceofconveyorbelt.rollerrepairandreplacementcostsarealsoanimportantpartofconveyorbeltoperatingexpenses.Therolleroperationqualityforconveyoroftherunningresistance,powerconsumption,rollerandbeltlife,maintenanceworkloadandcostoftransportationhasasignificantimpact.Therefore,analysismethodtoextendtheservicelifeofrollers,alsoanimportantcontentstoensurestableoperationofbeltconveyor,practicalsignificanceinengineering.Troughrollerofbeltconveyorsystemsusedonmaterialbearingbranch,playsupportingroleandincreasedthroughputrole.Parallelrollerisalong-shapedroller,forno-loadbranchofconveyor,toplayasupportingroleofno-loadbranchtape;bufferrolleristroughrollertoo.Flexiblesupporttroughrollerbeinstalledonconveyorloadbranch,Installedinthematerialoffice.Reducetheimpactofmaterialforconveyorbelt,protectthetapeandsupportbearing.Theroleofself-aligningrollerisacertaindegreeofautomaticadjustmentofconveyorbeltdeviation,Toavoidexcessivewearofbeltandmaterialsscattered.Intheloadandno-loadbranchareequippedwithanumberofself-aligningroller.Ifrollerappearrotatingnotflexibleo
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