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帶傳動(dòng)摘要：v帶傳動(dòng)被廣泛應(yīng)用于各種機(jī)械中，因此去理解它并知道如何去設(shè)計(jì)它是十分必要的。V帶和帶輪是v帶傳動(dòng)的兩個(gè)最重要的組成部分，中心距、帶輪直徑和轉(zhuǎn)速是v帶傳動(dòng)中最基本的參數(shù)。V帶傳動(dòng)包含一個(gè)主動(dòng)輪和一個(gè)從動(dòng)輪，我們根據(jù)傳動(dòng)比來(lái)設(shè)計(jì)它們的直徑關(guān)鍵詞：v帶傳動(dòng)中心距帶輪直徑傳動(dòng)比v帶傳動(dòng)裝置包括一個(gè)主動(dòng)皮帶輪、一個(gè)從動(dòng)皮帶輪和一個(gè)無(wú)接頭的繞兩帶輪旋轉(zhuǎn)的v形帶。這樣的v帶傳動(dòng)裝置需要有一個(gè)扭矩測(cè)量裝置，為此要在主動(dòng)輪和從動(dòng)輪上都要裝有速度測(cè)量器，它能連續(xù)地、時(shí)時(shí)地檢測(cè)出皮帶輪的轉(zhuǎn)速。這兩個(gè)速度測(cè)量器是用一電子控制裝置相連接的，這種電子控制裝置能根據(jù)帶輪轉(zhuǎn)速確定主、從動(dòng)輪之間的傳動(dòng)比，另外還有一個(gè)校準(zhǔn)裝置，它能在限定的扭矩范圍內(nèi)幫助設(shè)定傳動(dòng)比，它是與電子控制裝置連接在一起的。V帶設(shè)計(jì)還要牽涉到v帶傳動(dòng)裝置的預(yù)防保護(hù)措施，即如何能方便地針對(duì)不同的傳動(dòng)負(fù)載來(lái)確定最佳的扭矩，并能具有協(xié)調(diào)v帶傳動(dòng)的功能。比如，協(xié)調(diào)控制主、從動(dòng)輪和v帶之間的傳動(dòng)。V帶傳動(dòng)及其設(shè)計(jì)是要得益于扭矩測(cè)量裝置，該裝置利用v帶在主、從