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外文翻译--电主轴技术水平分析-高速电主轴单元.doc

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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)Theelectricaltechnicallevelofmainshaftisanalysed3AbstractElectricalmainshaftistheprocessingmachinetoolofnumericalcontrolheartparts,thispaperhasintroducedtypicalstructureandtheworkingprincipleofelectricalmainshaft,haselaboratedthecrucialtechnologyofelectricalmainshaft,hassummarizedittodeveloptendency.KeywordTheelectricalporcelainballofmainshaftmixthebearinglubricationofoilgas1,itisgeneraltostatetheprocessingqualitythatcannotonlyraiseprocessingefficiencysubstantiallybecauseofhighspeedprocessingandcanstillraiseworkpieceapparently,so,itsapplicationfieldisveryextensive,isespeciallyinaerospace,themanufacturingindustriessuchasautomobileandmouldin.Itisspoiltrecentlythatso,themachinetoolofnumericalcontrolthathashighspeedprocesscapabilityhasbecomemarket.Now,thedomesticandinternationaleachfamousmanufacturerofmachinetooladoptstheelectricalstructureofmainshaftextensivelyinthemachinetoolofnumericalcontrol,isespeciallybeingcompoundtoprocessmachinetoolandmuchaxletounitetomove,polyhedronprocessingmachinetoolandthemachinetoolofparallelconnectionin.Electricalmainshaftistheprocessingmachinetoolofnumericalcontrolheartparts,itsperformanceindexdirectdecisionthelevelofmachinetool,itisthatmachinetoolrealizesbasicconditionandtheprerequisiteofhighspeedprocessing.2theworkingprincipleelectricalmainshaftoftheworkingprinciple,typicalstructureand2.1advantageelectricalmainshaftsofelectricalmainshaftisthedirectmotorrotorofbehollowpackinmainshafton,statorknowssupercoolingbutcoverfixes,formacompleteunitofmainshaftinthecasingholeofmainshaft,afterstartingeclectricityrotordirectlydrivetheoperationofmainshaft.Thetypicalstructurallayoutwayofthetypicalstructuralelectricalunitofmainshaftof2.2electricalmainshaftsisthatgeneratorsetsupbeforemainshaft,rearaxleChengbetweenaspictureshow,itsadvantageisthattheaxialsizeoftheunitofmainshaftisthebig,mediumsizedmachinetoolofnumericalcontrolshortcomparatively,therigidityofmainshaftbig,powersuitscomparativelyItisinsufficienttobethenaturallyscatteredhotconditioninthegeneratorinthecasingofmainshaftthatenclosestodifferfrom,hashighertemperaturerise.The1casingsofmainshaftthe2coolingsetsof345importstatorrotorsofcoolingwaterthe6setsof78910former11canexportfeedbackinstallationbearingrearaxlesofcoolingwaterofrunnershaftofmainshaftofmainshaftChengtheadvantageelectricalprovinceofmainshaftof2.3electricalmainshaftshavegonetotakeshiporpositivedrive,the0transmissionsthathaverealizedmachinetoolhaveraisedtransmissionefficiency.Therigidityof4electricalmainshaftgood,rotaryprecisionissexhighrespondfastgood,canrealizeveryhighrotationalspeedandaddandslowdowndegreeanddecideanglestopfastdefinitelyCaxlecontrol,thescopeofspeedadjustmentiswide.3,thecrucialtechnicalconceptofelectricalmainshaftofelectricalmainshaftshouldnotbesimpletounderstandforthemerelyasleeveofmainshaft,andshouldbeasetofassembly,includeStator,rotor,bearing,thehighspeedinstallationoffrequencyconversionandlubricationinstallandcoolinstallation.Thereforeelectricalmainshaftisthewithhighspeedbearingtechnical,lubricationtechnical,coolingtechnicaltechnical,preciseproductionofdynamicbalancingwiththetechnologiessuchasassemblytechnologyaswellasgeneratorhighspeeddrivesynthesizetoutilize.Thewithhighspeedbearingtechnologyof3.1electricalmainshaftsrealizestheelectricalhighspeedofmainshafttomelt,ispreciseandcrucialtobetheapplicationofhighspeedprecisebearing.Nowthebearingthatappliedinhighspeedpreciseelectricalmainshafthavepreciserollbearingandliquidmovementpressbearingandgaspressbearingandmagneticsuspensionbearingquietly,butitispreciseanglecontactporcelainballbearingandprecisecylinderrollerbearingmainly.ItishighthatliquidmovementpressthestandardizationlevelofbearingGaspressesbearingquietlytobeimproperforintherateoccasionofgreatmeritMagneticsuspensionbearingbecauseofcontrolsystemcomplex,priceisexpensive,itspracticalitygetsrestriction.Anglecontactballbearingcannotonlyatthesametimebearradialandaxialload,andrigidityhigh,highspeedperformancegood,structuralsimplecompact,kindspecificationsnumerousrepaireasilytochange,thusinelectricalmainshaft,getextensiveapplication.Nowalongwiththedevelopmentofporcelainbearingtechnology,theelectricalbearingofmainshaftofthemostapplicationistomixporcelainballbearing,rollbodyuseSi3N4porcelainball,withthestructureoflittlepearldensepearl,bearingferruleenclosesforGCr15steel.Isthiskindoftomixbearingtopasstoreducelittlecentrifugalforceandtopmoment,reducethefrictionbetweenlittleballandracewaygroove,sogetlowertemperatureriseandbetterhighspeedperformance.Porcelainballmixbearingandsteelballbearingcompare,advantageisasfollows1theporcelainballbearingfrictionperformanceofporcelainandsteelcompositionverygood,canreducethestressofmaterialandlubricant.2becauseofporcelaindensitylow,canreducethecentrifugalforceinoperation.3theheatwithlowerporcelaincoefficientofexpansionhavereducedbearingefficientlyaddthechangeofloadinadvance.4theflexiblemouldofporcelainquantityhigher,canraisetherigidityofbearing.Abovementionedfactorhaveprolongedthelifeofbearingsubstantiallywithhavepromotedtheoperationlimitspeedofbearing.

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