外文翻译--电主轴技术水平分析-高速电主轴单元.doc
1毕业设计(论文)外文参考文献翻译机械工程系(院)2008届题目(中文)电主轴的机械设计(英文)themechanicdesignsofelectricspindles学生姓名专业班完成日期:2008年3月23日目录21.电主轴技术水平分析(8)2.高速电主轴单元(14)Theelectricaltechnicallevelofmainshaftisanalysed3Abstract:Electricalmainshaftistheprocessingmachinetoolofnumericalcontrol"heartparts",thispaperhasintroducedtypicalstructureandtheworkingprincipleofelectricalmainshaft,haselaboratedthecrucialtechnologyofelectricalmainshaft,hassummarizedittodeveloptendency.Keyword:Theelectricalporcelainballofmainshaftmixthebearinglubricationofoilgas1,itisgeneraltostatetheprocessingqualitythatcannotonlyraiseprocessingefficiencysubstantiallybecauseofhighspeedprocessingandcanstillraiseworkpieceapparently,so,itsapplicationfieldisveryextensive,isespeciallyinaerospace,themanufacturingindustriessuchasautomobileandmouldin.Itisspoiltrecentlythatso,themachinetoolofnumericalcontrolthathashighspeedprocesscapabilityhasbecomemarket.Now,thedomesticandinternationaleachfamousmanufacturerofmachinetooladoptstheelectricalstructureofmainshaftextensivelyinthemachinetoolofnumericalcontrol,isespeciallybeingcompoundtoprocessmachinetoolandmuchaxletounitetomove,polyhedronprocessingmachinetoolandthemachinetoolofparallelconnectionin.Electricalmainshaftistheprocessingmachinetoolofnumericalcontrol"heartparts",itsperformanceindexdirectdecisionthelevelofmachinetool,itisthatmachinetoolrealizesbasicconditionandtheprerequisiteofhighspeedprocessing.2theworkingprincipleelectricalmainshaftoftheworkingprinciple,typicalstructureand2.1advantageelectricalmainshaftsofelectricalmainshaftisthedirectmotorrotorofbehollowpackinmainshafton,statorknowssuper-coolingbutcoverfixes,formacompleteunitofmainshaftinthecasingholeofmainshaft,afterstartingeclectricityrotordirectlydrivetheoperationofmainshaft.Thetypicalstructurallayoutwayofthetypicalstructuralelectricalunitofmainshaftof2.2electricalmainshaftsisthatgeneratorsetsupbeforemainshaft,rearaxleChengbetween(aspictureshow),itsadvantageisthattheaxialsizeoftheunitofmainshaftisthebig,medium-sizedmachinetoolofnumericalcontrolshortcomparatively,therigidityofmainshaftbig,powersuitscomparatively;Itisinsufficienttobethenaturallyscatteredhotconditioninthegeneratorinthecasingofmainshaftthatenclosestodifferfrom,hashighertemperaturerise.The1casingsofmainshaftthe2coolingsetsof345importstatorrotorsofcoolingwaterthe6setsof78910former11canexportfeedbackinstallationbearingrearaxlesofcoolingwaterofrunnershaftofmainshaftofmainshaftChengtheadvantageelectricalprovinceofmainshaftof2.3electricalmainshaftshavegonetotakeshiporpositivedrive,the0transmissionsthathaverealizedmachinetoolhaveraisedtransmissionefficiency.Therigidityof4electricalmainshaftgood,rotaryprecisionissexhighrespondfastgood,canrealizeveryhighrotationalspeedandaddandslowdowndegreeanddecideanglestopfastdefinitely(Caxlecontrol),thescopeofspeedadjustmentiswide.3,thecrucialtechnicalconceptof"electricalmainshaft"ofelectricalmainshaftshouldnotbesimpletounderstandforthemerelyasleeveofmainshaft,andshouldbeasetofassembly,include:Stator,rotor,bearing,thehighspeedinstallationoffrequencyconversionandlubricationinstallandcoolinstallation.Thereforeelectricalmainshaftisthewithhighspeedbearingtechnical,lubricationtechnical,coolingtechnicaltechnical,preciseproductionofdynamicbalancingwiththetechnologiessuchasassemblytechnologyaswellasgeneratorhighspeeddrivesynthesizetoutilize.Thewithhighspeedbearingtechnologyof3.1electricalmainshaftsrealizestheelectricalhighspeedofmainshafttomelt,ispreciseandcrucialtobetheapplicationofhighspeedprecisebearing.Nowthebearingthatappliedinhighspeedpreciseelectricalmainshafthavepreciserollbearingandliquidmovementpressbearingandgaspressbearingandmagneticsuspensionbearingquietly,butitispreciseanglecontactporcelainballbearingandprecisecylinderrollerbearingmainly.Itishighthatliquidmovementpressthestandardizationlevelofbearing;Gaspressesbearingquietlytobeimproperforintherateoccasionofgreatmerit;Magneticsuspensionbearingbecauseofcontrolsystemcomplex,priceisexpensive,itspracticalitygetsrestriction.Anglecontactballbearingcannotonlyatthesametimebearradialandaxialload,andrigidityhigh,highspeedperformancegood,structuralsimplecompact,kindspecificationsnumerousrepaireasilytochange,thusinelectricalmainshaft,getextensiveapplication.Nowalongwiththedevelopmentofporcelainbearingtechnology,theelectricalbearingofmainshaftofthemostapplicationistomixporcelainballbearing,rollbodyuseSi3N4porcelainball,withthestructureof"littlepearldensepearl",bearingferruleenclosesforGCr15steel.Isthiskindoftomixbearingtopasstoreducelittlecentrifugalforceandtopmoment,reducethefrictionbetweenlittleballandracewaygroove,sogetlowertemperatureriseandbetterhighspeedperformance.Porcelainballmixbearingandsteelballbearingcompare,advantageisasfollows:(1)theporcelainballbearingfrictionperformanceofporcelainandsteelcompositionverygood,canreducethestressofmaterialandlubricant.(2)becauseofporcelaindensitylow,canreducethecentrifugalforceinoperation.(3)theheatwithlowerporcelaincoefficientofexpansionhavereducedbearingefficientlyaddthechangeofloadinadvance.(4)theflexiblemouldofporcelainquantityhigher,canraisetherigidityofbearing.Above-mentionedfactorhaveprolongedthelifeofbearingsubstantiallywithhavepromotedtheoperationlimitspeedofbearing.