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中英文資料翻譯REVIEWONINTERNATIONALRESEARCHSTATEONHIGHTEMPERATUREACTIVEMAGNETICBEARINGRadialactivemagneticbearing(AMB)isatypicalsysteminmagneticsuspensionfield.Theactivemagneticbearingcansupportarotorwithoutcontactbyusingelectromagneticforce.Withtheadvantageofunlubricated,littleoilcontaminated,longlife-spanandtheadaptabilityofvariousenvironment,AMBiswidelyused.SotheresearchonAMBismoreandmorefurther.Itisreasonabletodesignthestructureofactivemagneticbearingproperlyfortheimprovementofitsperformance.BasedonfiniteelementanalysissoftwareCOMSOLMultiphysics,thesimulationofAMBisstudiedwhilethesuspendingforceofAMBiscalculated.First,webuiltupadynamicparametermodel,sowecananalyzethemagneticfielddistributionandmagneticforceatanarbitrarysize.Thenwediscussedsomeelementwhichaffectmagneticfieldsuchascoilcurrent,airgap,polewidthandrotorbiasundertwoworkingmode.ThentheoptimizationprocessofAMBmodelispresentedonthebasisofoptimizationsoftwareiSIGHTtogetherwithCOMSOL,duringwhichtheAMBmodeliscalledautomaticallybyiSIGHT.WeusedsequentialquadraticprogrammingmethodandtheresultshowsthatthecombinationofCOMSOLMultiphysicsandiSIGHTsoftwareisaconvenientandeffectivemethodforthesimulationandoptimizationofAMBsystem.Atlast,weusedPIDcontrollertorealizetheclose-loopcontrolonsingledegreeoffreedomAMBsystem,andanalyzetheperformanceofPIDcontrollerwiththesimulationresultonSimulink.Throughtheresearchabove,wefinishthedesignofthewholeactivemagneticbearingsystem.TheresearchresultprovidesafeasiblemethodfortheanalysisandoptimizationofAMBsystem,whichwillbeusefulfortheengineeringapplication.Inthepastfewyears,theaviationindustryhasbeengrowingcontinuously,butthemarketisverycompetitiveisalwaysnecessary.Hightemperatureactivemagneticbearingholdgreatpromiseforimprovingjetturbineengine,andthusreducingmaintenancecostandkeroseneconsumption.Inthatgoal,lotsofresearchhasbeenperformedabouthightemperatureactivemagneticbearinganditscomponents(likesoftmagneticmaterial,insulationcoils···).Thisarticlepresentsthedevelopmentofresearchinthisfield,itshistory,itsstateanditsoutlook.Theaviationmarketisnowadaysgrowingcontinuously.Inordertosustainitsdevelopment,thismarkethasaconstantneedoftechnicalimprovementstoimprovecompetitiveness.Today,virtuallyallaircraft’sjetenginesuselubricatedballbearings.Thissystemsuffersfromdiversedrawbacklikethenecessityofacomplexcoolingsystemthatweighsdownthejetengineandlimitsitsworkingtemperature.Activemagneticbearingshavebeensuccessfullyusedfordecadesinnumerousapplications.Theyhaveshowngreatcapacitiestoworkinextremeconditions,suchasvacuumorathighrotationspeed.Theideaistoreplacetheconventionalbearingsinjetenginesbymagneticbearings.Inthe90s,themajorityofmagneticbearingswereworkingundercommontemperature(lessthan100℃).Injetengines,thecurrentworkingtemperatureisabout260℃,thusprovingfeasibilityofmagneticbearingsforjetenginesapplicationwasrequired.Inthesametimeresearchwereperformedonsoftmagneticmaterialforhightemperatureapplications,theproofoffeasibilityofmagneticbearingworkingat550℃wasdonebyXuLongxiang.Usinghightemperatureactivemagneticbearingmaysignificantlyimprovethejetengines.Firstthistechnologywillallowoperatingatmuchhigherspeedsandtemperatures(upto550℃),openingspacefordesignofmorepowerfuljetengines.SinceAMBarenon-con-tactbearings,thereisnomoreneedforlubricant.Removingthelubricantsystemwillmakethesystemmorefire-safe(nopossibleoilemissions)andalsoimprovetheweightoftheengine(upto5%less).This,addedtotheeliminationoffrictionlosses,willhavedirectinfluenceonthekeroseneconsumption.Theobjectiveofthisarticleistopresenttherecentdevelopmentonhightemperaturemagneticbearing.Thedevelopmentofhightemperaturemagneticforjetengineapplicationincludesdiverseresearchproject,withthreemainprojects.In1997,Kondoleonhasbeenstudyingsoftmagneticalloysforhightemperatureradialmagneticbearings.XuLongxianghasthendemonstratedthefeasibilityofanactivemagneticbearingworkingat540℃andinvestigatehightemperaturedisplacementsensor.In2000,Mekhichebrieflydescribedthedesign,fabrication,andtestingofahigh-temperaturemagneticbearingoperatingat50000rpm.In2003,Montaguehasworkedonaprototypeofhightemperatureactivemagneticbearinganddevelopacoilfabricationprocess.In2006,Burdethasdevelopedafirst5degreeoffreedomhightemperatureactivemagneticbearingandinvestigateaneddycurrentpositionsensorusingthick-filmtechnology.Thethreemainprojectsthathavebeeninvestigatinghightemperatureactivemagneticbearingare:-TheEuropeanprojectforActiveMagneticBearingsinAircraftTurbo-machinery(AMBIT)from1995to2000,-AprojectofDesignandFabricationofHigh-TemperatureRadialMagneticBearingforTurboMachinerybytheNASAfrom2000,-TheEuropeanresearchprojectMagFly-ActiveMagneticBearingforTurboMachineryfrom2002to2006.TheobjectivesofAMBITweretoinvestigateandtodemonstratethefeasibilityofanactivemagneticbearingthatworksattemperaturesupto540℃.Aone-degree-of-freedomhightemperatureAMBrigwasbuiltaswellasafive-degree-of-freedomprototypewithahightemperatureradialbearing.Hereisthetestrigforahightemperatureactivemagneticbearing,operatinginacontainmentheatedupto550℃andrunningat30000rpm.GlennH.ResearchcenterworkspresentlyonahightemperatureAMB.Itisahightemperature,heteropolar,radialmagneticbearingcomposedofasingleradialbearinglocatedatthecenterofashaftmountedonballbearings.Ithasbeenoperatedfor29hoursat540℃during18thermalcyclesonMay2003.Thisprojecthasbeencreatedwiththegoalofdevelopingasmartjetengineusingmagneticbearings.PartofitwastodevelopanAMBprototypeworkingathightemperature.Forthisproject,LucBurdethasdevelopedthefirst5degreeoffreedomhightemperatureactivemagneticbearing.Ithasbeenrunningatenvironmenttemperaturesupto550℃.Duringhisthesis,hehasimplementedandvalidatedamodularfiniteelementsthermalmodelwithlowcomputationtimeforhightemperatureAMBs.Hehasalsodevelopedathick-filmlowcosteddycurrentpositionsensorfor550℃applicationsandtestedmaterialsforthedesignofhightemperatureelectromechanicalsystemhavebeentested.Inaddition,ananalysisoffailuresrelatedtohightemperaturehasbeendoneandillustrated.WhiletheAMBsdevelopedinAMBITsatisfiedtherequirements,problemswereencounteredwithoverheatingandcoilshortcircuits.ThoseproblemshavebeenpartiallyresolvedbyMontague,whichhasdevelopedacoilmanufacturingprocess.Inthisprocess,inordertoreducethedifficultyofwoundingthecoilsontheback-ironcore,choicehasbeenmadenottousestatorlaminationlegdesignedasonecontinuousring.Instead,amodulardesignwhereeachmodulecontainstwopolesin“C”shapehasbeenchosen.Thewireiswoundonbothpolescontinuously,eliminatingmanyconnections.ThematerialusedforthestatorlaminationsisHiperco50(thecommonlyusedsiliconsteelcannotbechosenherebecauseitsCurietemperatureistoolow),while99.9-percent-pureannealedsilverwirewaschosen.Wireinsulationiscriticalpointforhightemperatureactuators.Itrequirementsarethefollowing:agoodthermalconductor,flexible,compactandsupportingtemperaturesupto800℃.Itmustprotecttheconductintegrityandkeepfromcrackingorflakeoff.Itmustalsohavegoodtoughnessandscratchresistancetoavoidturn-to-turnshort-circuit.Finally,theauthorsusedacommerciallyavailable,two–compound,clearceramiccoating.Attheend,thecoilwindingsareencapsulatedandbondedwithanaluminabasedceramicpottingcompound.Anothercriticalpointofthehightemperaturemagneticbearingisthedevelopmentofareliablepositionsensor.Commonsensorscannotbeusedbecauseoftheinfluenceoftemperatureonmaterialproperties.ThisproblemhasbeenstudiedbyBurdetwhichhasdevelopedaneddycurrentpositionsensorusingthick-filmtechnology.Theobjectivewastofindaworkingsolutionfor550℃.SmallinductorshavebeenprintedonAl2O3substrates.Aconductinglayerisprintedasinsulation.Asecondconductinglayeristhenprinted.Bothconductinglayersareconnectedtogetherinthecentreofthecoil.Inthecaseradialsensor,thesensitivityisdirectlyrelatedtotheinductor.Aprototypesensorofsilverwith200μmtrackwidth,withsilverwiresandsilverpastewireconnectionshasbeentested.Testshaveshownthatafter600hoursinafurnaceat550℃thesensorinductanceandresistancesufferverylittlechanges.However,problemhasarisenduetosilvermigration.Sensorshavetobeconnectedtoleadingwires,andthatpointismuchmorecritical,withdendritesaregrowingquitefastbetweenthetwoconnectorpadsathightemperature,andthuscreatingshortcircuit.Solutionstoslowdownthiseffecthavebeentested.Whilecoveringtheconductorlayerandthesolderingwithadielectric,sensorsarestillworkingafter700hoursat600℃.Thesensingprincipleoftheradialsensorisbasedontwoplanarcoilspastedonasubstrate.Theexcitationcoilembracestherotor.ItissuppliedwithanACcurrentsourceinordertocreateahighfrequencymagneticfield.Eddycurrentsarecreatedontherotorsurface.Thepositionmeasurementisdonedifferentially.Twocoilsfacingonetotheotherareconnectedtogetherinseries,sothatwhentherotoriscentered,theoutputsignaliszero.Whentherotorismovingfromthemiddleposition,avoltageismeasurable.Thesignalamplitudeisproportionaltothepositionandthemeasuredsignalsignisrelatedtothedisplacementdirection.Theradialpositionsensoristhusabletomeasurealongtwoorthogonalaxes.Unfortunately,sensornoiseappearsafterashorttimeduetosilvermigration.Magneticfluidisanewtypefunctionmaterialwhichisbothmagneticandliquid,andit’stheonlysuper-paramagneticmaterialatroomtemperature.Magneticfluidaccelerometerisanapplicationofmagneticfluid’sself-levitationtheory,anditsstructureissimpleandreliable.Withtheadvantageofdetectinglowfrequencyacceleration,magneticfluidaccelerometercouldbewidelyusedinmilitaryandaerospace.Themainworkofthisthesisisasfollow:——Magneticfluid’sself-levitationisanalyzed;Dependenceoflevitationondimensionofmagnetsandaccelerometer’sshell,volumeandsaturationmagnetizationofmagneticfluidaregiveoutbyexperimentswhichshowthemainfactorsthatinfluencelevitationforcearethedimensionofmagnetsandthevolumeofmagneticfluid.——Theinfluenceofthetwofactorsonthesensorisgivenout.——Thestructureofaccelerometerisdesignedbyconclusionofexperiments.——Thefrequencyofexcitingsignalisgivenoutbyexperiment.Finally,thecircuitofsensorisdesigned.——Thesensoristestedwhichshowthesensor’ssensitivityis15.3V/g.Dependenceoftheself-levitationforceonseveralfactorsaregivenout,thestructureandcircuitofaccelerometeraredesignedandtheaccelerometeristested.It’sagoodfoundationfornextwork.Inordertoinvestigatethedynamiccharactersinfluencedbythebasevibration,thestiffbase-activemagneticbearing(AMB)-rotorsystemmodelissetup.Thestabilityoftherotorisanalyzedintheconditionsofdifferentexcitingamplitudesandfrequenciesofthebasevibration.Itisclearthattherotorbecomeunstablewhenthevibrationisbecomingsmart.Comparedwiththedynamiccharacteroftherotorwithoutbasevibration,theresultsshowthatthebasevibrationinfluenceonthedynamiccharactercannotbeignored.Thebasevibrationnotonlycausestherotoraxisdeviatefromtheabsoluteposition,butalsocausesthestiffnessandtheprecisionoftherotorfall.Moreover,ifthebasevibrationisdrastic,theAMBwilllosethesupportingability.Sothebasevibrationmustbeconsideredinmodelbuildingandcontrollerdesigningprocess.Inthefuture,themainresearchfieldwillhavetobeexploredforthedevelopmentofhightemperatureactivemagneticbearings.Firstofall,itnowexistveryfewdataaboutmaterialsforhightemperatureapplications.Beforethecomponentcanbeputintoasystem,itsbehaviorunderworkingconditionhastobechecked.Itisreallytimeconsuming,astimeandthermalcycleareimportantparametersformateriallifespan.IterativedevelopmentinordertoacquiredataabouthighperformanceandhighlifespanmaterialforhightemperatureapplicationsisaprimordialneedforfurtherAMBresearch.Anotherveryimportantpointisthedevelopmentofreliablepositionsensors.TheonedevelopedbyBurdetmettherequirements,butasproblemariseduetosilvermigration,levitationwasnotpossibleformorethanashorttime.Anotherfieldtoinvestigateisthelongterminfluenceoftemperatureonthesystembehavior.Untilnow,onlyshorttermtestshavebeenperformed,andmostofthemwerewithoutrotation.Studyingthesystemcomportmentunderrealworkingconditionwillbethenextstepofhightemperatureactivemagneticresearch.Thisarticlehaspresentedthecurrentstateofresearchinthefieldofhightemperatureactivemagneticbearing.Futureworksinthisdomainwillneedtocontinuestudyingmaterialfabricationprocessandtheirpropertiesathightemperaturewithmorerealisticworkingconditionsandtodevelopamorerobustnewsensorforhightemperatureapplication.Also,studymustbedoneonthelong-termeffectofhightemperatureandstressonthesystembehavior.回顧國際高溫超導(dǎo)磁懸浮軸承的研究狀況在磁懸浮領(lǐng)域中,應(yīng)用最廣泛的就是磁懸浮軸承。它是利用電磁力將轉(zhuǎn)軸懸浮在磁場中,使轉(zhuǎn)子在空間無機(jī)械接觸、無磨損地旋轉(zhuǎn)的一種新型高性能軸承。由于具有無需潤滑、無油污染、壽命長以及適用于許多應(yīng)用環(huán)境等優(yōu)點(diǎn),因而具有一般傳統(tǒng)軸承所無法比擬的優(yōu)越性,因此近年來國內(nèi)外對(duì)其研究都頗為重視。為了提高磁懸浮軸承的性能,需要合理設(shè)計(jì)磁軸承的結(jié)構(gòu),這就要求對(duì)磁軸承的電磁場以及磁懸浮力有深入的了解,為此本文基于有限元分析軟件COMSOLMultiphysics建立了主動(dòng)磁懸浮軸承系統(tǒng)的有限元分析模型,通過仿真對(duì)磁懸浮軸承在單側(cè)磁極作用和差動(dòng)磁極作用兩種工作方式下,激勵(lì)電流、氣隙寬度、磁極寬度、偏心等因素對(duì)其電磁力的影響進(jìn)行了深入細(xì)致的探討。然后,本文探討了一種將優(yōu)化軟件iSIGHT與COMSOLMultiphysics相結(jié)合來對(duì)磁懸浮軸承進(jìn)行優(yōu)化設(shè)計(jì)的方法,并采取序列二次規(guī)劃算法對(duì)磁懸浮軸承進(jìn)行了結(jié)構(gòu)優(yōu)化設(shè)計(jì),得出了相應(yīng)條件下磁軸承的最優(yōu)參數(shù),取得了滿意的結(jié)果,從優(yōu)化結(jié)果來看:COMSOL與iSIGHT軟件相結(jié)合來對(duì)磁懸浮軸承進(jìn)行分析設(shè)計(jì)是一個(gè)快捷、有效的方法.最后,為磁懸浮軸承系統(tǒng)建立單自由度的控制模型,本文采用經(jīng)典的PID控制策略來實(shí)現(xiàn)對(duì)單自由度磁懸浮軸承系統(tǒng)的閉環(huán)控制,并給出了閉環(huán)控制系統(tǒng)的仿真和分析結(jié)果,完成了整個(gè)磁懸浮軸承系統(tǒng)的設(shè)計(jì)。本文的研究結(jié)果可以為磁懸浮軸承的電磁場分析和結(jié)構(gòu)設(shè)計(jì)提供參考和依據(jù),也為進(jìn)一步的磁軸承的多物理建模和仿真分析以及多學(xué)科設(shè)計(jì)優(yōu)化等提供了一個(gè)可行的途徑,具有一定的現(xiàn)實(shí)意義。近年來,雖然航空制造業(yè)經(jīng)歷了持續(xù)不斷地發(fā)展,但是市場是充滿各種競爭的,通常要對(duì)成本進(jìn)行合理的優(yōu)化配置。高溫超導(dǎo)磁力軸承在噴氣渦輪發(fā)動(dòng)機(jī)的改善中具有極好的前景,并且能減少設(shè)備的維護(hù)費(fèi)用以及燃料損耗。為了實(shí)現(xiàn)這一目標(biāo),越來越多的關(guān)于高溫超導(dǎo)磁力軸承及其相關(guān)組件的研究項(xiàng)目正在不斷地開展(例如常溫超導(dǎo)材料,絕緣線圈···)。這篇論文將介紹了這一研究領(lǐng)域的發(fā)展?fàn)顩r,它的發(fā)展歷史,以及它現(xiàn)在的發(fā)展情況和未來的市場前景。今天,航空制造業(yè)正在持續(xù)不斷地發(fā)展。為了維持并推動(dòng)它的發(fā)展,市場迫切地需要通過技術(shù)進(jìn)步來提高市場競爭力?,F(xiàn)今,幾乎所有的航空噴氣發(fā)動(dòng)機(jī)都是采用潤滑球軸承這種方式。然而這一系統(tǒng)如今正遭受著各種各樣的缺陷的困擾,例如綜合冷卻系統(tǒng)的使用會(huì)增加噴氣發(fā)動(dòng)機(jī)的總重量并限制了他的工作溫度范圍。近十年來,超導(dǎo)磁力軸承在眾多的領(lǐng)域里得到了更為廣泛的應(yīng)用。它們?cè)跇O端的工作環(huán)境下仍然能展現(xiàn)出強(qiáng)大的工作能力,例如在真空環(huán)境和高速旋轉(zhuǎn)等條件下。這種用磁力軸承替代常規(guī)軸承的想法逐漸被提了出來。在本世紀(jì)九十年代,有大量的磁力軸承適合在常溫環(huán)境下工作(低于一百攝氏度)。然而,在噴氣發(fā)動(dòng)機(jī)中,其當(dāng)前的工作溫度大約是二百六十?dāng)z氏度左右,因此提高磁力軸承在噴氣發(fā)動(dòng)機(jī)中應(yīng)用的可行性是十分必要的。在同一時(shí)期的其他研究中,對(duì)適合在高溫條件下應(yīng)用的常規(guī)磁性材料的研究正在被不斷開展,其中,徐龍祥教授檢驗(yàn)并論證了磁力軸承在五百五十?dāng)z氏度的環(huán)境下開展工作的可行性。使用高溫超導(dǎo)磁力軸承能在很大程度上提升噴氣發(fā)動(dòng)機(jī)的性能。首先這一技術(shù)將允許在高溫高速環(huán)境下的操作(超過五百五十?dāng)z氏度),因此它適合用來制造設(shè)計(jì)推力更加強(qiáng)勁、性能更加優(yōu)越的噴氣發(fā)動(dòng)機(jī)以開展對(duì)外太空的探索。由于超導(dǎo)磁力軸承是一種無接觸的軸承,對(duì)于潤滑劑的使用需求會(huì)越來越少。由于無需潤滑系統(tǒng),這將使整個(gè)系統(tǒng)在高溫下的運(yùn)轉(zhuǎn)更加的安全(不需要排放廢氣)并且降低了整個(gè)發(fā)動(dòng)機(jī)的總重量(至少降低百分之五以上)。這樣,更多地消除了摩擦損耗,同時(shí)對(duì)燃油的損耗將會(huì)產(chǎn)生更加直接的影響。這篇論文的目的是為了說明高溫磁力軸承在當(dāng)前市場上的發(fā)展?fàn)顩r。高溫磁力軸承在噴氣發(fā)動(dòng)機(jī)中的應(yīng)用發(fā)展包含了多種多樣的研究計(jì)劃,其中包括三個(gè)主要的項(xiàng)目部分。在一九九七年,康德萊恩已經(jīng)發(fā)現(xiàn)了適合用于制造高溫放射狀磁力軸承的常溫磁性合金。徐龍祥隨后又驗(yàn)證了高溫超導(dǎo)磁力軸承在五百四十?dāng)z氏度條件下工作的可行性并研究設(shè)計(jì)出相應(yīng)的高溫位置傳感器。在二零零零年,邁克赫克簡略地描述了高溫磁力軸承在每分鐘五萬轉(zhuǎn)的條件下工作時(shí)的設(shè)計(jì)制造,裝配及檢測過程。在二零零三年,蒙泰格制定了一個(gè)高溫超導(dǎo)磁力軸承的標(biāo)準(zhǔn)并且研發(fā)了一種特殊的線圈制造處理工序。在二零零六年,博得特研發(fā)了第一個(gè)具有五個(gè)自由度的高溫超導(dǎo)磁力軸承和一種使用了薄膜技術(shù)的通用渦流位置傳感器這三個(gè)研究高溫超導(dǎo)磁力軸承的工程項(xiàng)目分別是:——一九九五年到二零零零年,由歐洲開展的高溫超導(dǎo)磁力軸承渦輪增壓系統(tǒng)的航空器項(xiàng)目,——二零零零年,由美國國家航空和宇宙航行局展開的高溫放射狀磁力軸承的設(shè)計(jì)與制造項(xiàng)目,——二零零二年到二零零六年,由歐洲研究設(shè)計(jì)的高溫超導(dǎo)磁力軸承渦輪增壓系統(tǒng)項(xiàng)目。設(shè)計(jì)高溫超導(dǎo)磁力軸承渦輪增壓系統(tǒng)的目的是為了研究和論證超導(dǎo)磁力軸承在五百四十?dāng)z氏度以上環(huán)境下工作的可行性。一種單自由度高溫超導(dǎo)磁力軸承設(shè)備已經(jīng)像上述具有五個(gè)自由度的高溫放射狀軸承的標(biāo)準(zhǔn)一樣被建立起來。這是一種高溫超導(dǎo)磁力軸承的檢測設(shè)備,它是在一個(gè)密閉的,溫度在五百五十?dāng)z氏度以上,轉(zhuǎn)速在三萬轉(zhuǎn)每分鐘的環(huán)境下工作的。格倫研究中心目前正在設(shè)計(jì)一種高溫超導(dǎo)磁力軸承。它是一種高溫,多磁極,放射狀磁力軸承組成的位于球軸承桿件中心的一種單一放射狀軸承。在二零零三年五月份,直到第十八個(gè)熱量循環(huán)周期完成為止,它已經(jīng)在五百四十?dāng)z氏度的環(huán)境下連續(xù)工作了二十九個(gè)小時(shí)。這個(gè)項(xiàng)目已經(jīng)建立了一個(gè)用磁力軸承開發(fā)高靈敏度噴氣發(fā)動(dòng)機(jī)的目標(biāo)。其中的一部分是制定一個(gè)在高溫下工作的高溫超導(dǎo)磁力軸承的標(biāo)準(zhǔn)。對(duì)于這個(gè)工程項(xiàng)目,拉克博得特研發(fā)了第一個(gè)五自由度高溫超導(dǎo)磁力軸承。它已經(jīng)能夠在超過五百五十?dāng)z氏度的環(huán)境溫度下開展工作?;谒恼撐恼擖c(diǎn),他已經(jīng)執(zhí)行并且驗(yàn)證一種具有有限原理的熱量模型標(biāo)準(zhǔn)化組件,并且對(duì)高溫超導(dǎo)磁力軸承的運(yùn)行進(jìn)行了粗略的時(shí)間估算。同時(shí),他還開發(fā)設(shè)計(jì)了一種低成本的薄膜通用渦流位置傳感器以適應(yīng)在五百五十?dāng)z氏度環(huán)境下的工作,并且一種高溫機(jī)電系統(tǒng)的設(shè)計(jì)檢測材料已經(jīng)處于測試中。另外,一種與高溫有關(guān)聯(lián)的對(duì)失敗的測試結(jié)果進(jìn)行分析的報(bào)告已經(jīng)完成,其原因也在報(bào)告中被闡明。然而,在高溫超導(dǎo)磁力軸承渦輪增壓系統(tǒng)的航空器項(xiàng)目中開發(fā)研制的高溫超導(dǎo)磁力軸承對(duì)于調(diào)整的需要及要求還比較令人滿意的時(shí)候,然而卻突然遭遇到過熱問題以及線圈電流回路短路問題的困擾。開發(fā)出一種特殊的線圈制造加工工序的蒙泰格已經(jīng)解決了這類問題其中一部分。在這個(gè)工序中,為了解決減小對(duì)鐵質(zhì)襯里磁芯的損害這一難題,將不再采用先前的金屬固定片層壓薄膜材料支柱計(jì)劃而是采用一種連續(xù)的環(huán)狀設(shè)計(jì)。取而代之的是,一種其中每個(gè)模塊都包含兩個(gè)C型極性的組件設(shè)計(jì)已經(jīng)被采用。金屬導(dǎo)線將連續(xù)不斷地是所有的磁極受到損傷。用來制造金屬固定片層壓薄膜的材料是Hiperco50(通常使用的硅鋼在這里不能選擇使用是因?yàn)樗木永餃囟戎堤偷木壒剩欢兌冗_(dá)到百分之九十九點(diǎn)九的鍍銀金屬導(dǎo)線卻被選擇使用。金屬絲絕緣層是實(shí)現(xiàn)高溫驅(qū)動(dòng)的關(guān)鍵因素。他的要求如下所述:一個(gè)性能優(yōu)良的熱導(dǎo)體,是靈活柔韌的,緊湊密實(shí)的并且能夠支持在超過八百攝氏度的高溫環(huán)境下使用。它必定要保持良好的導(dǎo)電性能并且能夠杜絕破裂和剝落的現(xiàn)象的發(fā)生。它同時(shí)還必須擁有十分出色的韌性和接觸電阻以避免輪流反復(fù)的短路現(xiàn)象。因此作者使最終決定采用一種在商業(yè)上可利用的,以兩種復(fù)合的陶瓷材料制成的覆蓋層作為金屬導(dǎo)線的絕緣層材料。最后,這些彎曲的金屬線圈需要與一種基于陶瓷復(fù)合物而制成的氧化鋁材料結(jié)合,并用膠囊將線圈包裹住。使高溫磁力軸承能夠廣泛使用
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