制动器外文翻译 盘式制动器试验台上测量空气中磨损颗粒2

本科生毕业设计（论文）外文翻译毕业设计（论文）题目几种典型的制动器的对比分析与设计外文题目ADISCBRAKETESTSTANDFORMEASUREMENTOFAIRBORNEWEARPARTICLES译文题目盘式制动器试验台上测量空气中磨损颗粒学生姓名专业车辆工程指导教师姓名评阅日期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盘式制动器试验台上测量空气中磨损颗粒摘要在制动过程中，制动盘和摩擦片都有磨损。这个过程产生的碎粒有可能进入到空气中。在实地测试中，是很难辨别来自周围环境的其他碎粒的影响。因此，实验室中试验台的设计，被允许对周围空气环境的清洁度进行控制。该试验台中有一个右前方刹车总成，它安装在一个密封腔中。制动负荷由气压系统实施，制动盘由电动马达驱动，制动盘表面已经预先产生一层生锈层，用以模仿在潮湿的环境下停泊一晚的汽车的制动盘。然后测量空气中的磨损颗粒的数量以及大小。这个实验装置已经在低负荷制动下，经过一系列的初始测试的结果所G4355实。这个结果表G2652该试验台能被用G4127G3929G2126制动盘生锈层G1154锈。G3关键词G289磨损G30空气中颗粒G3678G30盘G3252制动G2934试验台G30锈层G3简介许G1407G3929G2126已经G4355G2652，对G2002G2210G994G2374的影响和空气中颗粒G3678在大气中的G2761度G4365G1975的G1681G2387。在G1100G3271环境中，空气中的颗粒G3678可能来自G994G3517G3035G1281，G2376G3106G1047G2949和G2009设，G1496G1091G3879G1532G2494，G2525G1701到G1701G2052G1160，车到G2494面G2052G1160以及盘G3252制动G2934。在制动过程中，G3661G2530是刹车片G4144制动盘的磨损，都G1878产生磨损颗粒。其中一G3796磨损颗粒G1094G1906在制动系统的G4087G2001G3176，G1431G2454一G3796G4245G3387G1508G2861G3131。此G3571，G3609G3058G876可G2220制动G3839能，一G3796制动系统G3859G3985刹车片G4144制动盘经G1064G1161G4127低压G2052G1160G4465G3423。这G4405G2944G4068可以G3040G1154汽车因在潮湿的环境停泊一晚所产生的G3081G1765生锈层，G3040G1154G2420制动盘G3176的锈层G1838能G876G1115G2052G1160面的清洁。然G1431，由此产生的G4517G2383G2159G4249G1958G2420G3063G2424的G3784G1755和产生的磨损颗粒，因G3609摩擦片在生锈层G3040G1154后G3087然G1878G4144制动盘G2052G1160。因此，G4075该在G994影响刹车G3839能的前G3476下G2096量G1992G3186刹车G3552动。G3在实地测试G3240，测量空气制动颗粒，G3029别它G4144其他方G3252产生的气G3095G2027是很G2290难的。因此，允许控制周围的空气洁G2122度可能是G4523G1754G3248用的实验室测试。G2096G1685有G1931个试验G4287已经G2009成用G4127G3929G2126G2704磨以及制动盘和摩擦片G2072面摩擦，一G3796G3929G2126G4438G3985G1922中在磨损颗粒。G3在实验室试验台，控制周围的空气洁G2122度可以G1623G1407G1623G4473G3058的G3929G2126空气刹车磨损颗粒。G2217G2510到这一G1316，实验室G4518G2001试验台被设计来测量空气中磨损颗粒的数量和盘G3252制动G2934磨损产生的颗粒大小。G903G3635的G2690的是来G2637G1883这个试验台和G2690前G1307一个测试系列的结果，用以验G4355实验装置G17这G3796实验G4379在G3929G2126低负荷制动下G2012G3106G1765G3040G1154生锈层。G3实验装置G3在这个测试G4287，G3248用到G2047车右前制动总成。右前制动总成由转向节，车G2525轴承和盘G3252制动G2934总成G4518成。盘G3252制动G2934总成又由一个通G1508制动盘G4518成，它是指带有活塞的G1532钳盘制动G2934和两个摩擦片。手指端刹车片包括K型热电偶，用来测量G2052近指端制动盘G