中英文翻译-- V带传动.doc

TheV-beltDriveAbstract:Thev-beltdrivearewidelyusedinallkindsofmachanics,Sotounderstandandknowhowtodesignitisverynecessary.Thev-beltandthepulleyaretwomostimportantpartsofv-beltdrive,thecentredistance,thediameterofthepulleysandtherpmofthepulleysarethemostessentialparametersofthev-beltdrive.Thev-beltdrivehasadrivepulleyandapowertake-offpulley,wedesigntheirdiametersinthebasisofspeedratio.Keywords:v-beltdrivecentredistancepulleydiameterspeedratioTheV-beltdrivehasadrivepulleyandapowertake-offpulleyandanendlessV-beltrotatingaroundbothpulleys.ThisV-beltdriveisequippedwithatorquemeasuringdeviceinthatanrpmsensorisassignedtoboththedrivepulleyandthepowertake-offpulley,whichcontinuouslydetectsthepulleyrpm,thetworpmsensorsareconnectedwithanelectroniccontrolwhichdeterminesthegearratiobetweenthedriveandthepowertake-offpulleysfromthedetectedrpm,acalibrationdevice,whichassociatesasetgearratiowithadefinedtorqueisconnectedwiththeelectroniccontrol,andtheelectroniccontrolisconnectedwithanelectronicevaluator.TheinventionrelatestotheprovisionofaV-beltdrive,whereitispossibletodeterminethetorqueexistingatdifferentdriveloadsbysimplemeansandinanoptimalmanner,asafunctionofthecooperatingpartsoftheV-beltdrive,i.e.drivepulley,powertake-offpulleyandV-belt,andtocontrolandadjustitinthisway.TheV-beltdriveinaccordancewiththeinventionisequippedwithatorquemeasuringdevice,whichusesthedepthofpenetrationoftheV-beltintheV-beltgroovesofthedriveandpowertake-offpulleys,whichheretoforeoftenhadbeenconsideredtobeslippageandhadnotbeentakenintoaccount,aswellasthevariablegearratiocausedtherebyandcomparesthisgearratio,whichcontinuouslychangesasafunctionoftheloadonthedrivepulley,inanelectronicdevicewithapredeterminedtorque,evaluatesthedifferencesobtainedinthismannerforthechangingtorques,whichresultsintherespectivelyactualtorque.Bymeansofthisitispossibleinasimpleandassuredmannertocontrolandadjustthetorque；atthesametimedetectandimmediatelyremedydevelopingtroubles,overloads,wearandthelikeinconnectionwiththevariousmachinesanddevicestobepowered,suchasagriculturalmachinery,industrialmachineryandthelike.DifferingrotationaldiametersofthebeltarecausedbythesedifferingpenetrationdepthsoftheV-beltand,becauseofthat,differentrpmofthetwopulleys.TheRPMorgearratioofthetwopulleysischangedbymeansofthisaction.Tocompensateforthisaction,theRPMorgearratioischangedbymeansoftherpmsensors,dependingontheloadonthedrivepulleyandthepenetrationdepthintobothpulleysoftheV-belt.Therpmofbothpulleysiscontinuouslydetectedbymeansoftherpmsensors,andthesenumbersareenteredintotheelectronicdevice,whichformsaRPMgearratiotherefrom.Intheno-loadconditionorwithaknownloadoftheV-beltdriveacalibrationisperformedinthecalibrationdevicebyassigningtheRPMorgearratiotoasettorque.Theforegoingdescriptionofthespecificembodimentswillsofullyrevealthegeneralnatureoftheinventionthatotherscan,byapplyingcurrentknowledge,readilymodifyand/oradaptforvariousapplicationssuchspecificembodimentswithoutdepartingfromthegenericconcept,and,therefore,suchadaptationsandmodificationsshouldandareintendedtobecomprehendedwithinthemeaningandrangeofequivalentsofthedisclosedembodiments.Itistobeunderstoodthatthephraseologyorterminologyemployedhereinisforthepurposeofdescriptionandnotoflimitation.Thepurposeofunderstandingtheabovetheorysistodesignthev-beltdrive.Thetotaldesignrequirementistogetthebestdistancebetweenthecentresofthetwopulleys.Ofcourse,thedesignerhasafewknownconditionsbeforehe/shestartthedesign,suchastherpmofthedrivepulley,thegearratiobetweenthedrivepulleyandthepowertake-offpulley(ortherpmofthepowertake-offpulley),thepowertobetransmittedandtheworkcircumstancesofthev-beltdrive.Thefinalpurposeofthedesignistomakethev-beltdrivehavetheleastsizeinthebasisofmeetingtoalltheworkrequirements.Asknowntoall,thev-beltisoneofthemostimportantpartofthev-beltdrive.Soitisimportanttocomprehendtheconstructionofthev-beltandtochooseit.therayonandrubberv-beltarewidelyusedforpowertransmission.Suchbeltsaremadeintwoseries:thestandardv-beltandthehighcapacityv-belt.Thebeltscanbeusedwithshortcertredistancesandaremadeendless.Oneofthevirtuesofthev-beltisthatthecostislow,andpoweroutputmaybeincreasedbyoperatingseveralbeltssidebyside.Allthebeltsinthedriveshouldstretchatthesamerateinordertokeeptheloadequallydividedamongthem.Whenoneofthebeltsbreaks,thegroupmustusuallyberaplaced.Thedrivemaybeinclindatanyanglewithtightsideeithertoporbottom.Anotheradvantageisthattheincludeangleforthebeltgrooveisusuallyfrom34to38,thewidingactionofthebeltinthegroovegivesalargeincreaseinthetractiveforcedevelopedbythebelt.Anotherimportantpartofthev-beltdriveisthepulley,itmaybemadeofcastiron,sheetsteelordiecastmetal,graycast-ironiswidelyusedofallthesematerials.WhenthespeedoftheV-beltisnotmorethan25m/s,weshouldadoptHT150asthematerialsofthepulleys；Whenthespeedisbetween25to30m/s,weshoulduseHT200；Whenthespeedisbetween25to45,thenwecanemploynodularcastiron,caststeelorforgedsteel,wealsocanweldthepunchedsteelplatetouseasthepulleys.Whenthepowerdeliveredisnotverymuch,thepulleysalsocanbemadeincastaluminumorplastic,Thepulleyiscomposedbywheelflange,webandwheelnave.Pulleyareonthemarketthatpermitanadjustmentinthewidthofthegroove.Theeffectivediameterofthepulleyisvaried,andthemoderatechangesinthespeedratiocanbesecured.Usually,thesmallpulleyisthedrivepulley,andthelargeoneisusedasthepowertake-offpulley.AfterweunderstandtheusualstructureoftheV-beltDrive,weshouldanalysetheforceoftheV-belt,theanalysisoftheV-beltismoreimportant,themainforcesarepullingforceandstress,andthestressincludepullingstress,bendingstressandcentrifugalstress.Thedesignermustmakethepullingforceandthestressarenotmorethanthepermanentvalues.Inordertoavoidtheslipslide,wealsoshouldmakethetransmittedpower,thepullingforceandthespeedofV-belttosatisfiedsomerelations,itisP=F*V/1000.Inoneword,thedesignstandardoftheV-beltmustbesatisfied,itistosay,theV-beltnotslipslidewhenittransmitastaticpower,andatthesametime,theV-belthasenoughfatigueresistanceandadefinitelifetime.V带传动摘要：v带传动被广泛应用于各种机械中，因此去理解它并知道如何去设计它是十分必要的。V带和带轮是v带传动的两个最重要的组成部分，中心距、带轮直径和转速是v带传动中最基本的参数。V带传动包含一个主动轮和一个从动轮，我们根据传动比来设计它们的直径关键词：v带传动中心距带轮直径传动比v带传动装置包括一个主动皮带轮、一个从动皮带轮和一个无接头的绕两带轮旋转的v形带。这样的v带传动装置需要有一个扭矩测量装置，为此要在主动轮和从动轮上都要装有速度测量器，它能连续地、时时地检测出皮带轮的转速。这两个速度测量器是用一电子控制装置相连接的，这种电子控制装置能根据带轮转速确定主、从动轮之间的传动比，另外还有一个校准装置，它能在限定的扭矩范围内帮助设定传动比，它是与电子控制装置连接在一起的。V带设计还要牵涉到v带传动装置的预防保护措施，即如何能方便地针对不同的传动负载来确定最佳的扭矩，并能具有协调v带传动的功能。比如，协调控制主、从动轮和v带之间的传动。V带传动及其设计是要得益于扭矩测量装置，该装置利用v带在主、从