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外文翻译--带式输送机.doc

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外文翻译--带式输送机.doc

英文原文ESIGNOFSPEEDBELTCONVEYORSGLODEWIJKS,THENETHERLANDSTHISPAPERDISCUSSESASPECTSOFHIGHSPEEDBELTCONVEYORDESIGNTHECAPACITYOFABELTCONVEYORISDETERMINEDBYTHEBELTSPEEDGIVENABELTWIDTHANDTROUGHINGANGLEBELTSPEEDSELECTIONHOWEVERISLIMITEDBYPRACTICALCONSIDERATIONS,WHICHAREDISCUSSEDINTHISPAPERTHEBELTSPEEDALSOAFFECTSTHEPERFORMANCEOFTHECONVEYORBELT,ASFOREXAMPLEITSENERGYCONSUMPTIONANDTHESTABILITYOFITSRUNNINGBEHAVIORAMETHODISDISCUSSEDTOEVALUATETHEENERGYCONSUMPTIONOFCONVEYORBELTSBYUSINGTHELOSSFACTOROFTRANSPORTWITHVARIATIONOFTHEBELTSPEEDTHESAFETYFACTORREQUIREMENTSVARY,WHICHWILLAFFECTTHEREQUIREDBELTSTRENGTHANEWMETHODTOACCOUNTFORTHEEFFECTOFTHEBELTSPEEDONTHESAFETYFACTORISPRESENTEDFINALLY,THEIMPACTOFTHEBELTSPEEDONCOMPONENTSELECTIONANDONTHEDESIGNOFTRANSFERSTATIONSISDISCUSSEDBELTMACHINEBYCONVEYORBELTCONTINUOUSORINTERMITTENTMOTIONTOTRANSPORTALLKINDSOFDIFFERENTTHINGS,CANTRANSPORTALLKINDSOFBULKMATERIALS,BUTALSOTRANSPORTAVARIETYOFCARDBOARDBOXES,PACKAGINGBAGS,WEIGHTOFSINGLEPIECESOFSMALLGOODS,AWIDERANGEOFUSESBELTCONVEYORBELTMATERIALRUBBER,SILICONE,PVC,PUANDOTHERMATERIALS,INADDITIONTOORDINARYMATERIALCONVEYING,BUTALSOTOMEETTHETRANSMISSIONOILRESISTANT,CORROSIONRESISTANCE,ANTISTATICANDOTHERSPECIALREQUIREMENTSFORMATERIALBELTCONVEYORSTRUCTUREGROOVEBELTMACHINE,FLATBELTCONVEYOR,CLIMBINGBELTMACHINE,TURNINGMACHINESANDOTHERFORMSBELT,CONVEYORBELTCANALSOBECREATEDTOENHANCETHETAILGATE,SKIRTSANDOTHERACCESSORIES,CANMEETAVARIETYOFTECHNOLOGICALREQUIREMENTSTHEBELTCONVEYORDRIVEDECELERATIONMOTORDRIVE,ELECTRICDRIVEROLLERBELTCONVEYORMODEFREQUENCYCONTROL,STEPLESSTRANSMISSIONTHEBELTRACKMATERIALCARBONSTEEL,STAINLESSSTEEL,ALUMINUMPROFILESCOPEOFAPPLICATIONLIGHTINDUSTRY,ELECTRONICS,FOOD,CHEMICAL,WOOD,ETCBELTMACHINEEQUIPMENTCHARACTERISTICSBELTCONVEYORISSTABLE,THEMATERIALANDTHECONVEYORBELTTHEREISNORELATIVEMOTION,TOAVOIDDAMAGETOTHECARRIERMATERIALLOWNOISE,SUITABLEFORQUIETWORKENVIRONMENTREQUIREMENTSSIMPLESTRUCTURE,EASYMAINTENANCELOWENERGYCONSUMPTION,LOWUSECOSTCONVEYORISACOMMONDONTHAVEFLEXIBLETRACTIONCOMPONENTCONTINUOUSCONVEYINGMACHINERY,ALSOCALLEDCONTINUOUSCONVEYORITISAMATERIALHANDLINGEQUIPMENT,ITWITHHANDLINGABILITYSTRONG,PERSISTENT,DIRECTION,FLEXIBLE,ANDOTHERADVANTAGESININDUSTRIALPRODUCTIONINLARGEBEINGAPPLIEDALTHOUGHMANYTYPESOFBELTCONVEYOR,BUTITSWORKINGPRINCIPLEISBASICSIMILAR,MOSTAREDRIVINGDRAUGHTDEVICEANDDRIVETRANSMISSIONCONTAINERTRANSPORTMATERIALSCONVEYORCANUNDERTAKELEVEL,THETILTANDVERTICALCONVEYOR,ALSOCANMAKETHESPACETRANSPORTROUTES,TRANSMISSIONLINESISUSUALLYFIXED,ISAMODERNPRODUCTIONANDLOGISTICSTRANSPORTINDISPENSABLEIMPORTANTMECHANICALEQUIPMENTITHASTRANSMISSIONCAPACITYISSTRONG,LONGDISTANCETRANSPORTATIONETCWITHTHEDEVELOPMENTOFINDUSTRY,CONVEYORALSOOBTAINEDFASTDEVELOPMENT,CONVEYORPRODUCTSHAVEBEENALSOGRADUALLYIMPROVEDWITHTHEEMERGENCEOFTHEPOWEREQUIPMENTOFSIMILARPRINCIPLEISAPPLIED,CONVEYORCONTINUINGINTOTHE19THCENTURY,BRITONSUSEBASKETWORK,WIREROPEFORTRACTIONBELTCONVEYORTHEPRINCIPLEOFBELTCONVEYOR,WHENAPPLIEDINTHE17THCENTURYALSORECORDEDCONVEYOR,IN1880GERMANCOMPANYDEVELOPEDDRIVENBYSTEAMBELTCONVEYORTHENTHEBRITISHANDGERMANANDLAUNCHEDINERTIALCONVEYOR,IFTHECONVEYORBELT,THEAPPLICATIONOFTHEPRINCIPLE,CREATINGATILTOFTHEBELTCONVEYOR,BELT,TRACTIONWITHCHAINSALLSORTSOFCONVEYORDURINGTHISTIMEARISECONVEYOR,BASEDONHUMAN,HYDRAULICPOWERDRIVESUCHALLTHESTRUCTURESCONVEYORSUCCESSIVELYAPPEAREDIN1887AMERICANSPRODUCEDTHESCREWCONVEYOR,MAKEENTERPRISEINTERNAL,BETWEENENTERPRISEANDINTERCITYTRANSPORTATIONPOSSIBLETHEDEVELOPMENTHISTORYOFBELTCONVEYOR,THEYVERYANCIENTINSTEADOFTHEORIGINALMOTIVEFORCONVEYORPROVIDEDRIVINGFORCEANCIENTPEOPLEBEGANTOUSEWATEROVERTURNEDANDHIGHTONGCHECONVEYOR,INTURNAFTERTHEWATERCONSERVANCYPROJECTSBELTCONVEYORBEGININPOWERQUICKTEMPEREDEXALTSACCORDINGTOTHEMODEOFOPERATIONCONVEYINGMACHINERYCANBEDIVIDEDINTO1BELTCONVEYOR2SCREWCONVEYOR3DOUPATTERNLIFTMACHINETHEFUTUREOFLARGESCALE,WILLTOWARDBELTUSESCOPE,ENERGYCONSUMPTION,LOWPOLLUTIONLESS,MATERIALAUTOMATICALLYGRADING,ETCPASTRESEARCHHASSHOWNTHEECONOMICALFEASIBILITYOFUSINGNARROWER,FASTERRUNNINGCONVEYORBELTSVERSUSWIDER,SLOWERRUNNINGBELTSFORLONGOVERLANDBELTCONVEYORSYSTEMSSEEFOREXAMPLEI5TODAY,CONVEYORBELTSRUNNINGATSPEEDSAROUND8M/SARENOEXCEPTIONSHOWEVER,VELOCITIESOVER10M/SUPTO20M/SARETECHNICALLYDYNAMICALLYFEASIBLEANDMAYALSOBEECONOMICALLYFEASIBLEINTHISPAPERBELTSPEEDSBETWEENTHE10AND20M/SARECLASSIFIEDASHIGHBELTSPEEDSBELOWTHE10M/SARECLASSIFIEDASLOWUSINGHIGHBELTSPEEDSSHOULDNEVERBEAGOALINITSELFIFUSINGHIGHBELTSPEEDSISNOTECONOMICALLYBENEFICIALORIFASAFEANDRELIABLEOPERATIONISNOTENSUREDATAHIGHBELTSPEEDTHENALOWERBELTSPEEDSHOULDBESELECTEDSELECTIONOFTHEBELTSPEEDISPARTOFTHETOTALDESIGNPROCESSTHEOPTIMUMBELTCONVEYORDESIGNISDETERMINEDBYSTATICORSTEADYSTATEDESIGNMETHODSINTHESEMETHODSTHEBELTISASSUMEDTOBEARIGID,INELASTICBODYTHISENABLESQUANTIFICATIONOFTHESTEADYSTATEOPERATIONOFTHEBELTCONVEYORANDDETERMINATIONOFTHESIZEOFCONVEYORCOMPONENTSTHESPECIFICATIONOFTHESTEADYSTATEOPERATIONINCLUDESAQUANTIFICATIONOFTHESTEADYSTATERUNNINGBELTTENSIONSANDPOWERCONSUMPTIONFORALLMATERIALLOADINGANDRELEVANTAMBIENTCONDITIONSITSHOULDBEREALIZEDTHATFINDINGTHEOPTIMUMDESIGNISNOTAONETIMEEFFORTBUTANITERATIVEPROCESS6DESIGNFINETUNING,DETERMINATIONOFTHEOPTIMUMSTARTINGANDSTOPPINGPROCEDURES,INCLUDINGDETERMINATIONOFTHEREQUIREDCONTROLALGORITHMS,ANDDETERMINATIONOFTHESETTINGSANDSIZESOFCONVEYORCOMPONENTSSUCHASDRIVES,BRAKESANDFLYWHEELS,AREDETERMINEDBYDYNAMICDESIGNMETHODSINTHESEDESIGNMETHODS,ALSOREFERREDTOASDYNAMICANALYSES,THEBELTISASSUMEDTOBEATHREEDIMENSIONALVISCOELASTICBODYATHREEDIMENSIONALWAVETHEORYSHOULDBEUSEDTOSTUDYTIMEDEPENDENTTRANSMISSIONOFLARGELOCALFORCEANDDISPLACEMENTDISTURBANCESALONGTHEBELT7INTHISTHEORYTHEBELTISDIVIDEDINTOASERIESOFFINITEELEMENTSTHEFINITEELEMENTSINCORPORATEVISCOELASTICSPRINGSANDMASSESTHECONSTITUTIVECHARACTERISTICSOFTHEFINITEELEMENTSMUSTREPRESENTTHERHEOLOGICALCHARACTERISTICSOFTHEBELTDYNAMICANALYSISPRODUCESTHEBELTTENSIONANDPOWERCONSUMPTIONDURINGNONSTATIONARYOPERATION,LIKESTARTINGANDSTOPPING,OFTHEBELTCONVEYORTHISPAPERDISCUSSESTHEDESIGNOFHIGHBELTSPEEDCONVEYORS,INPARTICULARTHEIMPACTOFUSINGHIGHBELTSPEEDSONTHEPERFORMANCEOFTHECONVEYORBELTINTERMSOFENERGYCONSUMPTIONANDSAFETYFACTORREQUIREMENTSUSINGHIGHBELTSPEEDSALSOREQUIRESHIGHRELIABILITYOFCONVEYORCOMPONENTSSUCHASIDLERSTOACHIEVEANACCEPTABLECOMPONENTLIFEANOTHERIMPORTANTASPECTOFHIGHSPEEDBELTCONVEYORDESIGNISTHEDESIGNOFEFFICIENTFEEDINGANDDISCHARGEARRANGEMENTSTHESEASPECTSWILLBEDISCUSSEDBRIEFLYMANYMETHODSOFANALYZINGABELT’SPHYSICALBEHAVIORASARHEOLOGICALSPRINGHAVEBEENSTUDIEDANDVARIOUSTECHNIQUESHAVEBEENUSEDANAPPROPRIATEMODELNEEDSTOADDRESS1ELASTICMODULUSOFTHEBELTLONGITUDINALTENSILEMEMBER2RESISTANCESTOMOTIONWHICHAREVELOCITYDEPENDENTIEIDLERS3VISCOELASTICLOSSESDUETORUBBERIDLERINDENTATION4APPARENTBELTMODULUSCHANGESDUETOBELTSAGBETWEENIDLERSSINCETHEMATHEMATICSNECESSARYTOSOLVETHESEDYNAMICPROBLEMSAREVERYCOMPLEX,ITISNOTTHEGOALOFTHISPRESENTATIONTODETAILTHETHEORETICALBASISOFDYNAMICANALYSISRATHER,THEPURPOSEISTOSTRESSTHATASBELTLENGTHSINCREASEANDASHORIZONTALCURVESANDDISTRIBUTEDPOWERBECOMESMORECOMMON,THEIMPORTANCEOFDYNAMICANALYSISTAKINGBELTELASTICITYINTOACCOUNTISVITALTOPROPERLYDEVELOPCONTROLALGORITHMSDURINGBOTHSTOPPINGANDSTARTINGUSINGTHE85KMCONVEYORINFIGURE23ASANEXAMPLE,TWOSIMULATIONSOFSTARTINGWEREPERFORMEDTOCOMPARECONTROLALGORITHMSWITHA2X1000KWDRIVEINSTALLEDATTHEHEADEND,A2X1000KWDRIVEATAMIDPOINTCARRYSIDELOCATIONANDA1X1000KWDRIVEATTHETAIL,EXTREMECAREMUSTBETAKENTOINSUREPROPERCOORDINATIONOFALLDRIVESISMAINTAINEDFIGURE27ILLUSTRATESA90SECONDSTARTWITHVERYPOORCOORDINATIONANDSEVEREOSCILLATIONSINTORQUEWITHCORRESPONDINGOSCILLATIONSINVELOCITYANDBELTTENSIONSTHET1/T2SLIPRATIOINDICATESDRIVESLIPCOULDOCCURFIGURE28SHOWSTHECORRESPONDINGCHARTSFROMARELATIVELYGOOD180SECONDSTARTCOORDINATEDTOSAFELYANDSMOOTHLYACCELERATETHECONVEYOR

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