机械外文翻译.docx

机械外文翻译.docx

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机械外文翻译

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

1.电主轴技术水平分析………………………………………………（8）

2.高速电主轴单元…………………………………………………（14）

Theelectricaltechnicallevelofmainshaftisanalysed

Abstract:

Electricalmainshaftistheprocessingmachinetoolofnumericalcontrol"heartparts",thispaperhasintroducedtypicalstructureandtheworkingprincipleofelectricalmainshaft,haselaboratedthecrucialtechnologyofelectricalmainshaft,hassummarizedittodeveloptendency.

Keyword:

Theelectricalporcelainballofmainshaftmixthebearinglubricationofoilgas

1,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.Therigidityofelectricalmainshaftgood,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.

Thelubricationtechnicalwithhighspeedelectricalmainshaftof3.2electricalmainshaftsthetemperaturerisethatmustcontrolbearingwithreasonable,controallablebearinglubricationway,inordertoguaranteestabilityandtheprecisionofthemachiningcomplexofnumericalcontrolofmachinetool.Adopttorollthelubricationwayoftheelectricalmainshaftofbearingnowhavethewaiessuchasfatlubrication,oilfoglubricationandthelubricationofoilgasmainly.

Fatlubricationintheelectricitywithrelativelylowerrotationalspeedmainshaftinismorecommonlubricationway.Thelubricationsystemoffatlubricationtypeelectricalmainshaftissimple,usesconvenienceandfreefromcontamination,hasstrongversatility.

Oilfoglubricationhaslubricationandcoolingdoublerole,itistakingcompressedairaspower,mixesoilliquidatomizationintoairthroughoilfogwaretoflow,thentransportsittoneedthelocationoflubrication.Theequipmentneededbyoilfoglubricationissimple,maintenanceconveniencehasmorecheapprice,isakindofwithhighspeedelectricallubricationwayofmainshaftthatusedgenerally.Butithaspollutiveenvironment,oilconsumemorehighershortcoming.Alongwiththeraisingthatpeopleaskforenvironmentalprotection,oilfoglubricationwaymustbesupersededgradually.

Thelubricationtechnologyofoilgasisusecompressedairthelubricatingoilofbetracedifferencesuccessioncontinuouslylandprovideeachsetofbearingofmainshaftaccurately,smalloildropinrollwith,outsideracewaybetweenformtheflexibleoilmembraneofdynamicpressure,andreduceaircantakethepartialheatsproducedbybearingoperation.

Practiceshowsthatthefueldeliveryinlubricationisbeenharmfulfortoomuchless,andformertwolubricationwaiescannotcontroltheamountoffueldeliveryaccurately,disadvantageintheraisingofthebearingrotationalspeedandlifeofmainshaft.Anddevelopthelubricationwayofoilgasofgetinguprecentlythelubricatingoilthatcancontrolthepointofeveryfrictionaccuratelyquantity,reliabilityisveryhigh.Practiceproofandthelubricationofoilgasarethemostidealmethodoflubricationofgreatmeritoftherateelectricalbearingofmainshaft,buttheequipmentneededbyitiscomplex,costishigh.Becauseofthelubricationwaylubricationeffectidealofoilgas,nowhavebecomeinternationalthelastmostpopularlubricationway.

Itscoolingelectricalmainshaftandtheanalysisofthermalsourceof3.3electricalmainshaftshavetwomajorinternalthermalsources:

Built-inmotorgiveoutheatwiththebearingofmainshaftgiveoutheat.Ifnotcontrol,fromtheheatthatthisarouseswarpcantheseriousprocessingprecisionandbearingservicelifethatreducesmachinetool,so,theservicelifethatcauseselectricalmainshaftshortens.

Electricalmainshaftbecauseofthedepositorytypeconfigurationofmainshaftinadopting,locateinthegeneratorintheunitofmainshaftcannotbreakupwithfanheat,thereforenaturally,scatteredhotconditionislackedcomparatively.Generatorisrealizingenergytransition,isinternaltoproducepowerloss,somakesgeneratorgiveoutheat.Studytoshow,isundergeneratorwithhighspeedoperationcondition,havenear1/3generatorgiveoutheatquantityfromgeneratorrotorproduce,andtheabsolutelymostofheatsthatrotorproducesarepassedthroughtheairgapbetweenrotorandstatorinstator;Others2/3thestatorthatheatproducesingenerator.Soproducethemajorsolutionmethodofgivingouthe