制動器外文翻譯 盤式制動器試驗臺上測量空氣中磨損顆粒2

本科生畢業(yè)設計（論文）外文翻譯畢業(yè)設計（論文）題目幾種典型的制動器的對比分析與設計外文題目ADISCBRAKETESTSTANDFORMEASUREMENTOFAIRBORNEWEARPARTICLES譯文題目盤式制動器試驗臺上測量空氣中磨損顆粒學生姓名專業(yè)車輛工程指導教師姓名評閱日期ADISCBRAKETESTSTANDFORMEASUREMENTOFAIRBORNEWEARPARTICLESABSTRACTDURINGBRAKING,THEREISWEARONBOTHTHEROTORANDTHEPADSTHISPROCESSGENERATESPARTICLESTHATMAYBECOMEAIRBORNEINFIELDTESTS,ITISDIFFICULTTODISTINGUISHTHESEPARTICLESFROMOTHERSINTHESURROUNDINGENVIRONMENTTHEREFORE,ALABORATORYTESTSTANDHASBEENDESIGNEDWHICHALLOWSCONTROLOFTHECLEANLINESSOFTHESURROUNDINGAIRTHETESTSTANDCONSISTSOFAFRONTRIGHTBRAKEASSEMBLYMOUNTEDINASEALEDCHAMBERABRAKINGLOADISAPPLIEDBYAPNEUMATICSYSTEMANDTHEROTOR,WHICHHASBEENPRECONDITIONEDWITHARUSTLAYERTOSIMULATEACARSTANDINGPARKEDOVERNIGHTINAWETENVIRONMENT,ISDRIVENBYANELECTRICMOTORTHENUMBERANDSIZEOFAIRBORNEWEARPARTICLESARETHENMEASUREDTHISEXPERIMENTALSETUPHASBEENVERIFIEDBYANINITIALTESTSERIESPERFORMEDATLOWBRAKINGLOADSTHERESULTSSUGGESTTHATTHISTESTSTANDCANBEUSEDTOSTUDYRUSTLAYERREMOVALFROMTHEROTORKEYWORDSWEARAIRBORNEPARTICLESDISCBRAKETESTSTANDRUSTLAYERINTRODUCTIONMANYSTUDIESHAVESHOWNANASSOCIATIONBETWEENADVERSEHEALTHEFFECTSANDTHECONCENTRATIONOFAIRBORNEPARTICLESINTHEATMOSPHERE13INURBANENVIRONMENTS,AIRBORNEPARTICLESCANCOMEFROMDIFFERENTSOURCES,EGDEMOLITIONANDCONSTRUCTION,4RESUSPENDEDROADDUST,5WHEELTORAILCONTACT,6,7CARTOROADCONTACT8,9ANDDISCBRAKES10,11DURINGBRAKING,BOTHTHEBRAKEPADSANDROTORSAREWORN,GENERATINGWEARPARTICLESSOMEOFTHESEPARTICLESAREDEPOSITEDONTHEBRAKEHARDWARE,ANDOTHERSBECOMEAIRBORNEFURTHERMORE,TOENSUREROBUSTBRAKEPERFORMANCE,SOMEBRAKESYSTEMSMAYREQUIRETHEPADSTOFREQUENTLYBEINLOWPRESSURECONTACTWITHTHEROTORTHISDRAGGINGMAYREMOVEANYRUSTLAYER,WHICHMAYBUILDSTANDINGPARKEDOVERNIGHTINAWETENVIRONMENT,FROMTHEROTORANDKEEPTHECONTACTSURFACESCLEANHOWEVER,THERESULTINGDRAGTORQUEINCREASESTHEFUELCONSUMPTIONANDGENERATESWEARPARTICLES,BECAUSETHEPADSARESTILLINCONTACTWITHTHEROTORAFTERTHERUSTLAYERHASBEENREMOVEDITISTHEREFOREDESIRABLETOREDUCETHEDRAGGINGWITHOUTAFFECTINGTHEPERFORMANCEOFTHEBRAKESWHENMEASURINGAIRBORNEBRAKEPARTICLESINFIELDTESTS,ITCANBEDIFFICULTTODISTINGUISHTHEMFROMOTHERTRAFFICGENERATEDAEROSOLSTHEREFORE,ITMAYBEPREFERABLETOUSELABORATORYTESTSTHATALLOWCONTROLOFTHECLEANLINESSOFTHESURROUNDINGAIRALTHOUGHSEVERALTESTSTANDSHAVEBEENBUILTTOSTUDYWEARANDFRICTIONATTHEPADTOROTORINTERFACE,FEWSTUDIES12,13HAVEFOCUSEDONWEARPARTICLESINALABORATORYTESTSTAND,THECLEANLINESSOFTHESURROUNDINGAIRCANBECONTROLLED,ENABLINGMOREACCURATESTUDYOFAIRBORNEBRAKEWEARPARTICLESWITHTHISINMIND,ALABORATORYCOMPONENTTESTSTANDHASBEENDESIGNEDTOMEASURETHENUMBERANDSIZEOFAIRBORNEWEARPARTICLESGENERATEDBYDISCBRAKESTHEPURPOSEOFTHISPAPERWASTODESCRIBETHISTESTSTANDANDPRESENTTHERESULTSOFAFIRSTTESTSERIESTOVERIFYTHEEXPERIMENTALSETUPTHESETESTSFOCUSONRUSTLAYERREMOVALATLOWBRAKINGLOADSEXPERIMENTALSETUPINTHISTESTSTAND,AFRONTRIGHTBRAKEASSEMBLYFROMAPASSENGERCARISUSEDTHEFRONTRIGHTBRAKEASSEMBLYCONSISTSOFAKNUCKLE,THEWHEELBEARINGANDTHEDISCBRAKEASSEMBLYTHEDISCBRAKEASSEMBLYINTURNCONSISTSOFAVENTILATEDROTOR,ASLIDINGCALIPERWITHASINGLEPISTONANDTWOBRAKEPADSFIGURE1THEFINGERSIDEBRAKEPADINCLUDESAKTYPETHERMOCOUPLETHATMEASURESTHETEMPERATURENEARTHEFINGERSIDEPADTOROTORCONTACTASCHEMATICDIAGRAMOFTHETESTSTANDISGIVENINFIGURE2ANELECTRICDIRECTCURRENTMOTORKWITHANOMINALTORQUEOF191NMDRIVESTHEROTOR,ANDAPNEUMATICSYSTEMMCONNECTEDTOTHEFRONTRIGHTBRAKEASSEMBLYHISUSEDTOAPPLYACONTROLLEDBRAKINGLOADWHENTHEBRAKEISAPPLIED,THEMOTORCONTINUESTODRIVETHESYSTEMATASTATIONARYROTATIONALSPEED,IETHETESTSYSTEMTHROTTLESANDBRAKESATTHESAMETIMEADRIVESHAFTLTRANSFERSTHETORQUEFROMTHEMOTORTOTHEWHEELBEARING,WHICHINTURNROTATESTHEDISCTHEMOTORANDTHEDRIVESHAFTARECONNECTEDBYAFIXEDCOUPLING,ANDTHEWHEELBEARINGANDTHEDRIVESHAFTARECONNECTEDBYASPLINEDCOUPLINGTHEKNUCKLEISMOUNTEDTOASUSPENSIONDEVICEASEALINGCHAMBERGSEALSTHEFRONTRIGHTBRAKEASSEMBLYFROMTHESURROUNDINGSTHEELECTRICMOTORISBALANCEDWITHBEARINGSONEACHENDTHEAPPLIEDTORQUEONTHEMOTORISMEASUREDUSINGACALIBRATEDSTRAINGAUGEFORCESENSORMULTIPLIEDBYTHEDISTANCEFROMTHEMOTORCENTRE,WITHANACCURACYOF22THEROTATIONALSPEEDOFTHEDISCISMEASUREDBYABUILTINHALLEFFECTSENSORINTHEWHEELBEARING,WITH48PULSESPERREVOLUTIONAPNEUMATICSYSTEMGENERATESCONTROLLEDLOWPRESSURELEVELSOFUPTO4BARINTHEBRAKECYLINDERTHEPRESSURELEVELISMEASUREDWITHANACCURACYOF05BYACALIBRATEDPIEZOELECTRICPRESSURESENSORNEARTHEINLETOFTHEBRAKECYLINDER盤式制動器試驗臺上測量空氣中磨損顆粒摘要在制動過程中，制動盤和摩擦片都有磨損。這個過程產(chǎn)生的碎粒有可能進入到空氣中。在實地測試中，是很難辨別來自周圍環(huán)境的其他碎粒的影響。因此，實驗室中試驗臺的設計，被允許對周圍空氣環(huán)境的清潔度進行控制。該試驗臺中有一個右前方剎車總成，它安裝在一個密封腔中。制動負荷由氣壓系統(tǒng)實施，制動盤由電動馬達驅(qū)動，制動盤表面已經(jīng)預先產(chǎn)生一層生銹層，用以模仿在潮濕的環(huán)境下停泊一晚的汽車的制動盤。然后測量空氣中的磨損顆粒的數(shù)量以及大小。這個實驗裝置已經(jīng)在低負荷制動下，經(jīng)過一系列的初始測試的結(jié)果所G4355實。這個結(jié)果表G2652該試驗臺能被用G4127G3929G2126制動盤生銹層G1154銹。G3關(guān)鍵詞G289磨損G30空氣中顆粒G3678G30盤G3252制動G2934試驗臺G30銹層G3簡介許G1407G3929G2126已經(jīng)G4355G2652，對G2002G2210G994G2374的影響和空氣中顆粒G3678在大氣中的G2761度G4365G1975的G1681G2387。在G1100G3271環(huán)境中，空氣中的顆粒G3678可能來自G994G3517G3035G1281，G2376G3106G1047G2949和G2009設，G1496G1091G3879G1532G2494，G2525G1701到G1701G2052G1160，車到G2494面G2052G1160以及盤G3252制動G2934。在制動過程中，G3661G2530是剎車片G4144制動盤的磨損，都G1878產(chǎn)生磨損顆粒。其中一G3796磨損顆粒G1094G1906在制動系統(tǒng)的G4087G2001G3176，G1431G2454一G3796G4245G3387G1508G2861G3131。此G3571，G3609G3058G876可G2220制動G3839能，一G3796制動系統(tǒng)G3859G3985剎車片G4144制動盤經(jīng)G1064G1161G4127低壓G2052G1160G4465G3423。這G4405G2944G4068可以G3040G1154汽車因在潮濕的環(huán)境停泊一晚所產(chǎn)生的G3081G1765生銹層，G3040G1154G2420制動盤G3176的銹層G1838能G876G1115G2052G1160面的清潔。然G1431，由此產(chǎn)生的G4517G2383G2159G4249G1958G2420G3063G2424的G3784G1755和產(chǎn)生的磨損顆粒，因G3609摩擦片在生銹層G3040G1154后G3087然G1878G4144制動盤G2052G1160。因此，G4075該在G994影響剎車G3839能的前G3476下G2096量G1992G3186剎車G3552動。G3在實地測試G3240，測量空氣制動顆粒，G3029別它G4144其他方G3252產(chǎn)生的氣G3095G2027是很G2290難的。因此，允許控制周圍的空氣潔G2122度可能是G4523G1754G3248用的實驗室測試。G2096G1685有G1931個試驗G4287已經(jīng)G2009成用G4127G3929G2126G2704磨以及制動盤和摩擦片G2072面摩擦，一G3796G3929G2126G4438G3985G1922中在磨損顆粒。G3在實驗室試驗臺，控制周圍的空氣潔G2122度可以G1623G1407G1623G4473G3058的G3929G2126空氣剎車磨損顆粒。G2217G2510到這一G1316，實驗室G4518G2001試驗臺被設計來測量空氣中磨損顆粒的數(shù)量和盤G3252制動G2934磨損產(chǎn)生的顆粒大小。G903G3635的G2690的是來G2637G1883這個試驗臺和G2690前G1307一個測試系列的結(jié)果，用以驗G4355實驗裝置G17這G3796實驗G4379在G3929G2126低負荷制動下G2012G3106G1765G3040G1154生銹層。G3實驗裝置G3在這個測試G4287，G3248用到G2047車右前制動總成。右前制動總成由轉(zhuǎn)向節(jié)，車G2525軸承和盤G3252制動G2934總成G4518成。盤G3252制動G2934總成又由一個通G1508制動盤G4518成，它是指帶有活塞的G1532鉗盤制動G2934和兩個摩擦片。手指端剎車片包括K型熱電偶，用來測量G2052近指端制動盤G