翻譯部分英文原文ThepresentandfuturedevelopmentofbeltconveyerAbstractThispaperanalyzesthepresentandfuturedevelopmentofdomesticandoverseasaboutbeltconveyer，especially，heavybeltconveyer（includetrendanalysisofthebeltconveyerandmonitoringtechnology），equipmentfunction，reliabilityandlife，expoundsthedevelopingtrendofbeltconveyer.Keywords：beltconveyer；present；futuredevelopment1Beltconveyortechnology,thestatusquoabroadConveyortechnologyabroadsoon,anditsmainlymanifestedintwoaspects:ontheonehand,thefunctionofconveyordiversification,expansionofthescopeofapplication,suchashighangleconveyor,tubeconveyor,spacemodelssuchasturningconveyor；conveyoritselfontheotherhand,thetechnologyandequipmenthasbeentremendousdevelopment,especiallylong-distance,largecapacity,high-speedlarge-scaleconveyorbelthasbeenbecomethemaindirectionofdevelopment,thecoretechnologyisthedevelopmentandapplicationoftheconveyordynamicanalysisandmonitoringtechnology,enhancingtheoperationoftheconveyorperformanceandreliability.Atpresent,theuseofcoalminebeltconveyorshownintable1hasreachedthemajortechnicalindicators,thekeytechnologyandequipmenthasthefollowingcharacteristics:(1)Large-scaleequipment.Themaintechnicalparametersandequipmenttowardthelarge-scaledevelopmenttomeettheannualproductioncapacityof300tomorethan5,000,000tofintensivehigh-yieldproductionofhigh-performanceneeds.(2)Theapplicationofdynamicanalysistechniques,andmechanicalandelectricalintegration,computermonitoringControl,suchashigh-tech,usinghigh-powersoft-startandauto-tensioningtechnology,dynamicconveyormonitoringandcontrol,greatlyreducedthedynamictensionoftheconveyorbelt,equipmentperformance,andhightransportefficiency.(3)Theuseofmulti-machine-drivenandpower-drivenandmiddle-balancetotheoperationofconveyortechnologychanges,sothatrunthelengthofasingleconveyorhasunlimitedintheory,andtoensurethatthecommoncarriersystemequipment,andinterchangeabilityandreliability-drivenunit.(4)New,highreliability,thekeytechnologycomponents.SuchastheCST,includingincludeavarietyofadvancedhigh-power-drivendevicesandspeedcontroldevices,high-lifehigh-speedroller,roller-typebyitselfdeviceswithhigh-performancestoragedevices,therapidshiftfromthetailandsoon.FSWproductionsuchastheUnitedKingdomFSW1200/(23)400(600)faceconveyortroughtheintroductionofaliquidorviscousdifferentialfrequencyconverter,transportcapacityof3000t/hormore,itsreproducedinthetailwiththenewmachines(suchastheUnitedStatesproducedbyJoyS500E)matchingcanbeautomaticallygoeswiththefacechangedrapidlysince,manualless,manufacturingandhighefficiency.Tab.1Themaintechnicalparametersofbeltconveyerinoverseas2Domesticconveyortechnology,thestatusquoTheMainparametersTelescopicbeltconveyortroughDistances/m2000-3000Morethan3000Speeds/(m/s)3.5-44-5,thetopis8Transportnumbers/(t/h)2500-30003000-4000power-driven/kw1200-20001500-3000，thetopis10100Chinasproductionofvarietiesofbeltconveyor,typemore.IntheEighthFive-YearPlanperiod,throughthenationalone-stopNissan10,000tonsfullymechanizedminingequipmentproject,theskilllevelofconveyorgreatlyimprovedcoalminewithhigh-power,long-distancebeltconveyorThekeytechnologyresearchandnewproductdevelopmenthavemadegreatprogress.Suchasthelong-distancebeltconveyorinclinationcompletesetsofequipment,high-yieldhigh-performancescalablefaceconveyortroughfilledthegap,etc.,andthekeytechnologyofbeltconveyorcomponentsanditsmainresearchandtheoreticalproductdevelopment,successfullydevelopedawiderangeofsoftstartandbrakingdeviceandthePLCasthecoreoftheprogrammableelectroniccontroldevices,variablespeeddrivesystemusingfluidcouplingsandplanetarygearreducer.Atpresent,Chinascoalminebeltconveyorwiththemaintechnicalcharacteristicsofindicatorsasshownintable2.Tab.2ThemaintechnicalparametersofbeltconveyerinChina3ConveyortechnologygapbetweendomesticandforeignLargebeltconveyor3.1keycoretechnologygap(1)BeltconveyorDynamicAnalysisandlong-distancemonitoringtechnology,thekeytohigh-powerconveyortechnologyisadynamicdesignandmonitoring,itisTheMainparameters300-500milliont/ahighefficiencycoalmineinChinaTelescopicbeltconveyorDistances/m1000-20001000-4000Speeds/(m/s)2-3.52.5-4Transportnumbers/(t/h)800-18001000-2000power-driven/kw250-750750-1500theconstraintsoflarge-scaleconveyorcoretechnologydevelopment.Chinasuseofrigidconveyortheoryanalysisandtodevelopcalculationmethodsanddesignspecifications,designofaconveyorbeltusingahighsafetyfactor(usuallytakenaroundn=10),adifferenceofdistancewiththeactualsituation.Conveyorbeltisinfactviscoelasticbody,long-distancebeltconveyoroftheconveyorbeltdrive,thebrakingforceofthedynamicresponseisaverycomplicatedprocessandcannotsimplybeexplainedbyrigid-bodymechanicsandcomputing.Hasdevelopedmethodsanddynamicdesignofbeltconveyorapplications,inalargeconveyorofconveyordynamictensionfordynamicanalysisanddynamicmonitoringofthesafetyfactortoreduceconveyorbelt,greatlyextendingtheservicelifetoensurethereliableoperationofconveyornature,sothatthedesignoflarge-scalebeltconveyorhasreachedthehighestlevel(conveyorbeltsafetyfactorn=56),andconveyorequipment,especiallythecostofgreatlyreducedthecostofaconveyorbelt.(2)Areliablecontrolledsoft-startpowertechnologyandmassbalanceoflong-distancebeltconveyortechnologybecauseoftheirlargecapacity,longdistanceandmulti-machine-driven,soft-startapproachmustbeusedtoreducethedynamictensionoftheconveyor,inparticular,isamulti-whenthemotordrive.Inordertoreducetheimpactonpowergrids,soft-starttimeshouldhaveaslowstart；alsostartaccelerationconveyorcontrol0.30.1m/s2,solutionwithcarryingbeltandthebeltdriveandconveyorbeltspeedsynchronizationsurgephenomenon,reducetheimpactofcomponents.Asaresultofmanufacturingerrorandtheelectricalcharacteristicsoftheerror,