中英文翻譯-- V帶傳動.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帶傳動摘要：v帶傳動被廣泛應用于各種機械中，因此去理解它并知道如何去設計它是十分必要的。V帶和帶輪是v帶傳動的兩個最重要的組成部分，中心距、帶輪直徑和轉速是v帶傳動中最基本的參數(shù)。V帶傳動包含一個主動輪和一個從動輪，我們根據(jù)傳動比來設計它們的直徑關鍵詞：v帶傳動中心距帶輪直徑傳動比v帶傳動裝置包括一個主動皮帶輪、一個從動皮帶輪和一個無接頭的繞兩帶輪旋轉的v形帶。這樣的v帶傳動裝置需要有一個扭矩測量裝置，為此要在主動輪和從動輪上都要裝有速度測量器，它能連續(xù)地、時時地檢測出皮帶輪的轉速。這兩個速度測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)帶輪轉速確定主、從動輪之間的傳動比，另外還有一個校準裝置，它能在限定的扭矩范圍內幫助設定傳動比，它是與電子控制裝置連接在一起的。V帶設計還要牽涉到v帶傳動裝置的預防保護措施，即如何能方便地針對不同的傳動負載來確定最佳的扭矩，并能具有協(xié)調v帶傳動的功能。比如，協(xié)調控制主、從動輪和v帶之間的傳動。V帶傳動及其設計是要得益于扭矩測量裝置，該裝置利用v帶在主、從