机械外文翻译Word文件下载.docx
- 文档编号:16582651
- 上传时间:2022-11-24
- 格式:DOCX
- 页数:10
- 大小:26.30KB
机械外文翻译Word文件下载.docx
《机械外文翻译Word文件下载.docx》由会员分享,可在线阅读,更多相关《机械外文翻译Word文件下载.docx(10页珍藏版)》请在冰豆网上搜索。
(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"
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
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 机械 外文 翻译