外文资料--Dynamic Analysis of Fo ur -Bar Be ating -upMechanismwith Joint Cle arance.pdf外文资料--Dynamic Analysis of Fo ur -Bar Be ating -upMechanismwith Joint Cle arance.pdf

收藏 分享

资源预览需要最新版本的Flash Player支持。
您尚未安装或版本过低,建议您

DYNAMICANALYSISOFFOURBARBEATINGUPMECHANISMWITHJOINTCLEARANCEXUEWENLIANG1,CHENGUOZHENS2,CHENGE3,ZHUZHANGCHENC71,CHENGLONGDIHš11KEYLABORATORYOFTEXTILESCIENCETECHNOLOGY,MINISTRYOFEDUCATION,DONGHUAUNIVERSITY,SHANGHAI201620,CHINA2SHANGHAISHENANTEXTILECO,LTD,SHANGHAI200020,CHINA3COLLEGEOFMECHANICALENGINEERING,DONGHUAUNIVERSITY,SHANGHAI201620,CHINAABSTRACTFORTHEFOURBARBEATINGUPMECHANISMOFAIRJETLOOM,THEPLAINBEARINGOFLINKAGEISTHEBEARINGWITHDYNAMICLOAD,ANDISIMMERSEDINTHELUBRICANTBOXIFTHEJOINTCLEARANCEISCONSIDERED,THERESEARCHONLINKAGEMOVEMENTCOULDBEVERYCOMPLICATEDINTHISPAPER,THEKINEMATICCHARACTERISTICSOFFOURBARBEATINGUPMECHANISMWITHJOINTCLEARANCEWERESTUDIEDBYANALYZINGTHETRACEOFJOURNALCENTERANDTHEBALANCEOFRADIAL,TANGENTIALFORCES,ANDBEARINGLOADTHEREGIONOFPRINCIPALVIBRATIONANDITSFORMINGCAUSESWEREDISCUSSEDANDTHERESULTSCOULDINTERPRETTHEMEASURINGCURVESOFFOURBARBEATINGUPMECHANISMCOMPLETELYKEYWORDSDYNAMICANALYSIS;FOURBARLINKAGE;BEATINGUPMECHANISM;JOINTCLEARANCECLCNUMBERTS1933DOCUMENTCODEAARTICLEID16725220201004055907INTRODUCTIONFORTHEFOURBARBEATINGUPMECHANISM,THECRANKSHAFTBEARINGANDROCKSHAFTBEARINGARETHEBALLBEARING,ANDTHECOUPLEJOURNALBEARINGANDCRANKJOURNALBEARINGARETHEJOURNALBEARINGTHECRANK,COUPLER,ROCKER,ANDTWOJOURNALBEARINGSAREALLIMMERGEDINTHELUBRICANT,ANDTHEREISTHERADIALCLEARANCEBETWEENTHERINGANDPINOFJOURNALBEARINGTHECLEARANCEISHELPFULTOTHERELATIVEMOTIONOFLINKSBYPROVIDINGTHESPACEOFMOVINGANDLUBRICATING,BUTITALSOLEADSTOTHEDISCONTINUOUSMOTIONOFKINEMATICPAIR,WHICHISTHEMAINREASONTOAFFECTTHEMECHANISMDYNAMICCHARACTERISTICS13FORTHEMECHANISMSTRANSFERRINGTHEFORCEANDMOMENTAPPLIEDINTHEINDUSTRYMANUFACTURING,ASTHEJOINTCLEARANCEENLARGINGTHEDYNAMICCHARACTERISTICSWILLBEDESTRUCTIVEUNDERTHECONDITIONOFHIGHSPEEDANDHIGHLOADTHEJOINTCLEARANCEOFFOURBARBEATINGUPMECHANISMISWITHINTHERANGEOFTOLERANCEIFRUNNINGSMOOTHLYSOMECLEARANCEINTHEJOINTOFMECHANISMISALWAYSNECESSARYBUTTHECLEARANCEISOFTENINCREASEDBYWEARING,THENTHEIMPACTFORCESCOULDCAUSETHEVIBRATION,NOISE,BEARINGDETERIORATION,ANDTHEWEARCOULDALSOBEINCREASEDTHEREFORE,THEVIBRATIONSBECOMEONEBASICSTUDYCONTENTABOUTMECHANISMKINETICSXIETALSTUDIEDTHERELATIONBETWEENTHEDYNAMICBALANCEANDTHEVIBRATION4,ANDSOONGETALSTUDIEDTHEDYNAMICCHARACTERISTICSOFCRANKSLIDERWITHJOINTCLEARANCE5THEDYNAMICALTERNATINGLOADISENDUREDBYTHEJOURNALBEARINGOFFOURBARBEATINGUPMECHANISMTHEFORCESOFLINKSARETRANSFERREDBYTHEOILFILM,ANDTHEPINCENTEROFCOUPLEJOURNALMOVESONTHETRACEWHENTHEECCENTRICITYISLITTLE,THEMOTIONOFROCKERISUNSTABLE,WHICHSHOULDLEADTOTHEINSTANTANEOUSIMPACTBETWEENTHERINGANDTHEPINANDMORESERIOUSWEAR,SOTHESTRONGVIBRATIONWILLHAPPENMOREFREQUENTLY1FOURBARLINKAGEWITHJOINTCLEARANCEIFTHEJOINTCLEARANCEOFMECHANISMISZERO,THECENTERSOFBEARINGANDJOURNALAREINTHESAMEPOSITIONBUTIFTHECLEARANCEAPPEARS,TWOCENTERSWILLBESEPARATED,WHICHCANRESULTINTHEECCENTRICITY,ANDTHEREISTHEEXTRADEGREEOFFREEDOMFORTHEMECHANISMTHEBEATINGUPMECHANISMWITHJOINTCLEARANCEISSHOWNINFIG1,WHICHISTHECRANKROCKERINVERSIONTHEBEARINGBISMADEUPOFCRANKANDCOUPLER,THEBEARINGCISMADEUPOFCOUPLERANDROCKER,THEROCKERSHAFTBEARINGDISMADEUPOFROCKERANDGROUNDLINK,ANDTHECRANKSHAFTBEARINGAISMADEUPOFGROUNDLINKANDCRANKFORTHEBEATINGUPMECHANISM,THECONNECTINGARMPINBEARINGCISEASIESTTOBEWORN,SOITISASSUMEDTHATTHEREISONLYTHECLEARANCEBETWEENTHECOUPLERPINANDRING,ANDNOCLEARANCEINOTHERTHREEBEARINGSINTHISPAPER,THEMEASURINGLOOMISTHEZA203AIRJETLOOMANDITSSPEEDIS450R/MINXYREFERENCECOORDINATEFRAMEOFMECHANISMSHOWNINFIG1ISSETACCORDINGTOTHEPRACTICALWORKINGPOSITIONTHEORIGINISTHEBEARINGCENTEROFCRANKSHAFTA,ANDTHECOORDINATEOFROCKERSHAFTBEARINGDCENTERAREXD8MMANDYD1598MMTHEOTHERPARAMETERSARE559JOURNALOFDONGHUAUNIVERSITYENGEDVOL27,NO42010RECEIVEDDATE20090115CORRESPONDENCESHOULDBEADDRESSEDTOXUEWENLIANG,EMAILXWLDHUEDUCNSHOWNINTABLE1FIG1FOURBARLINKAGEUSEDFORBEATINGWEFTUPINTOCLOTHTABLE1MAINPARAMETERSOFFOURBARMECHANISMLINKAGELENGTH/MMMASS/KGMOMENTOFINERTIAL/KGCM2CRANKAB353580155COUPLERBC75227114ROCKERCD1451042528SLEYANDSLEYSWORDDE64953728GROUNDLINKAD160THESLEYANDSLEYSWORDDEISTHEWORKINGLINKOFFOURBARMECHANISM,WHICHISINTEGRATEDWITHTHEROCKERWHENTHESLEYRECIPROCATES,THEREEDPUSHESTHEWEFTINTOTHEFELLOFCLOTHFORTHEINERTIAOFSLEYANDSLEYSWORDDRIVENBYTHEROCKERANDELBOWPOSITIONOFMECHANISMFORTHELINKSOFFOURBARBEATINGUPMECHANISM,THEMASSOFSLEYANDSLEYSWORDINCLUDINGTHEROCKERISMUCHHEAVIERTHANOTHERLINKSTHEMAINBODYOFROCKINGSHAFTISTHESTEELTUBEOFLARGEDIAMETERTHEMOTIONOFROCKERISSTABLEANDITSPROPERTYOFANTIJAMMINGISWELL,SOTHESLEYSWORDISCHOSENASTHEMEASURINGOBJECTIVEOFBEATINGUPMECHANISMACCELERATIONCURVEAPIEZOELECTRICACCELEROMETERISADSORBEDONTHESLEYSWORDDIRECTLYBYTHEMAGNETICSEAT,WHICHISSHOWNINFIG2THESLEYSWORDISSHORTANDSTRONG,WHICHOUTPUTSIGNALCOULDREFLECTSENSITIVELYTHEDYNAMICCHARACTERISTICSOFFOURBARLINKAGETHEMEASURINGACCELERATIONCURVEOFSLEYSWORDISSHOWNINFIG3,WHICHACCORDSWITHTHETHEORETICALACCELERATIONCURVE,ANDCHARACTERIZEDIN1THECURVEISNOTSMOOTH,WHICHMEANSTHATTHETHEORETICALSMOOTHCURVEHASBEENADDEDBYTHEOSCILLATIONSWITHDIFFERENTFREQUENCIESANDAMPLITUDESSEEFIG4FIG2SKETCHOFMEASURINGPOSITIONFIG3MEASURINGCURVEFIG4CONTRASTBETWEENMEASURINGCURVEANDTHEORETICALSMOOTHCURVE2THEOSCILLATIONSWITHDIFFERENTFREQUENCIESEXPRESSSTRICTPERIODICAL,ANDTHEDIFFERENCEISONLYTHEAMPLITUDESSEEFIG3FORTHEFOURBARBEATINGUPMECHANISMWITHFIXEDGEOMETRICALANDKINEMATICPARAMETERS,INTHEFIRSTTWOOR560JOURNALOFDONGHUAUNIVERSITYENGEDVOL27,NO42010THREEYEARSTHEOUTPUTACCELERATIONSIGNALOFMECHANISMWILLAPPEARAGAINCORRECTLYINTHENEXTPERIOD,ANDTHEVIBRATIONPULSEWITHFIXEDFREQUENCYANDAMPLITUDEWILLALSOAPPEARAGAINEVERYPERIODOFCRANKANGLESOTHEOUTPUTACCELERATIONSIGNALOFFOURBARBEATINGUPMECHANISMWITHJOINTCLEARANCEISNOTTHERANDOMSIGNAL,BUTTHEMAINBODYOFSIGNALISTHESIGNALWITHTHESTRICTPERIODICITYTHEOUTPUTCURVEOFMECHANISMISMAINLYMADEUPOFSIGNALSWITHTHESTRICTPERIODICITY,ANDALSOINCLUDESSOMERANDOMCOMPONENT3THERANDOMCOMPONENTOFVIBRATIONWILLINCREASEASTHEWORKINGTIMEOFLOOMTHATISTOSAYASTHEWORKINGTIMEOFMECHANISMINCREASES,THERANDOMCOMPONENTOFOUTPUTCURVEWILLBEGRADUALLYIMPROVEDSHOWNINFIG5,BISTHEINCLUDEDANGLEOFCOUPLERORITSEXTENDEDLINEANDCRANKWHENB0BOR180B,THECRANKANDTHECOUPLERAREINTHESAMELINE,ANDWHENTHEACCELERATIONOFCRANKISZERO,THEMECHANISMISINTHEPOSITIONOFELBOWLINKWHENB90BOR270B,THECRANKANDTHECOUPLERAREVERTICALEACHOTHER,ANDTHEACCELERATIONOFCRANKISLARGEACCORDINGTOTHEFOURSPECIALPOSITIONSABOVE,THESWINGPROCESSOFSLEYCOULDBEDIVIDEDINTOFOURREGIONSFIG5BANGLEOFFOURBARMECHANISM2RELATIVETRACEOFCOUPLERPINCENTERWITHJOINTCLEARANCEATSTATICBALANCEPOSITIONACCORDINGTOTHEMEASURINGCURVE,THEREISTHEIMPACTOFLINKSINTHEJOINTCLEARANCEBYMEASURINGTHECLEARANCEOFCRANKBEARINGIS2LM,ANDTHECLEARANCEOFCOUPLERPINJOURNALIS42LMSOITCOULDBECONCLUDEDTHATTHEIMPACTINTHEJOINTCLEARANCEWILLHAPPENMAINLYINTHECOUPLERPINJOURNAL21COUPLERPINJOURNALWITHCLEARANCETHEREARETWOCYLINDERSOFPINHOLEANDJOURNALSHOWNINFIG6THERADIUSOFJOURNALBEARINGHOLEISR,THERADIUSOFJOURNALISR,ANDTHERADIUSCLEARANCEISCRRTHEDISTANCEBETWEENTWOCENTRALLINESOFCYLINDERSISTHEECCENTRICITYEC1C2THECOUPLERANDTHEROCKERCONNECTEDBYTHECOUPLERJOURNALBEARINGAREBOTHMOVABLEPARTS,SOTHEBEARINGANDTHEJOURNALAREALSOBOTHTURNINGTHEREISTHEOILBETWEENTWOCYLINDERS,ANDTHETHICKNESSHOFEXTRUSIONFILMISHCESINHC1ESINH,1WHEREEE/CISTHEECCENTRICITY;HISTHEANGLEINCLUDEDBETWEENHANDC1C2INTHEVERTICALDIRECTIONFIG6GEOMETRICDIMENSIONOFJOURNALFORRADIALLOADFISTHETOTALLOADOFJOURNALBEARING,UBCISTHELINEARVELOCITYOFPINALONGTHEPINSURFACE,ANDUCDISTHELINEARVELOCITYOFJOURNALALONGTHERINGSURFACESEETABLE2TABLE2MAINPARAMETERSOFCOUPLERPINBEARINGNOMINALDIMENSIONOFJOURNALBEARINGHOLEANDJOURNAL2R/MMWIDTHOFPLAINJOURNALBEARINGL/MMVISCOSITYCOEFFICIENTOFLUBRICANTG/NSM1RADIUSCLEARANCECRR/MM404200175002122JOURNALCENTERTRACEOFSTATICBALANCEPOSITIONTHECRANKANDTHECOUPLERAREBOTHIMMERSEDINTHELUBRICANTBOXTHELUBRICANTINTHEJOINTCLEARANCEOFJOURNALANDBEARINGWILLTURNWITHTHEMTHEREISTHEHIGHERHYDRODYNAMICPRESSUREINTHEREGIONOFLESSCLEARANCE,ANDTHELOWERHYDRODYNAMICPRESSUREINTHEREGIONOFLARGERCLEARANCE,WHICHLEADSTOTHEDELIVERYHEADTHEBEARINGLOADISENDUREDBYTHEHYDRODYNAMICPRESSUREOFLUBRICANTFORTHEEFFECTOFOILWEDGETHESTATICBALANCEPOSITIONOFJOURNALCENTERISTHEBALANCEPOSITIONOFOILFILMFORCEANDBEARINGFORCETHEREISTHEDIFFERENCEBETWEENCOUPLERPINJOURNALANDORDINARYRADIALBEARING1THEDIRECTIONANDINTENSITYOFLOADONTHECOUPLERPINJOURNALALTERNATEASTHETIME2THESWINGVELOCITYOFJOURNALANDBEARINGCHANGESASTHETIMETHERELATIONBETWEENBEARINGLOADFANDDIMENSIONLESSOILFILMFORCE–ISSHOWNINEQ265FC/R2GUBCUCDL,2561JOURNALOFDONGHUAUNIVERSITYENGEDVOL27,NO42010WHEREFISTHEBEARINGLOAD,GISTHEDYNAMICVISCOSITY,ANDUBCANDUCDARESHOWNINFIG6ACCORDINGTOTHEDATAINTABLE3,THEBALANCEPOSITION7NF,C1C2COULDBESOLVEDBYTHEINTERPOLATIONTABLE3BEARINGPARAMETERSOFCIRCULARCYLINDERRATIOOFWIDTHANDRADIUSL/2R10ECCENTRICITYE010020030040050060070ECCENTRICANGLE7/B7511635955555008453240543602OILFILMFORCE–X0197041506801029152422963654THEJOURNALCENTERTRACECOULDBEDRAWNACCORDINGTOTHEECCENTRICANGLEANDTHEECCENTRICITYTHEJOURNALCENTERTRACEOFBEARINGWITHTHESTATICLOADUSUALLYISSEMICIRCLEBUTTHELOADOFCOUPLERPINJOURNALWILLVARYINTHESIZEANDDIRECTIONASTHETURNINGOFCRANK,SOTHEJOURNALCENTERWILLMOVEALONGTHETRACEOFSTATICBALANCEPOSITIONTHERELATIVETRACEOFJOURNALCENTERSTATICBALANCERELATIVETOTHECOUPLERPINJOURNALHOLESHOWNINFIG7IS8SHAPEDTHEPOLARANGLESHOWNINFIG7ISTHEDIRECTIONANGLEOFHOLE,ANDTHEPOLARRADIUSISTHEECCENTRICITYACCORDINGTOTHEFIGURE,THEREARETHREETIMESFORTHEJOURNALCENTERCOMINGINTOTHECIRCLEOFE01WHENTHECRANKANGLEISAT72B114B,ITISTHEFIRSTTIMEFORTHEJOURNALCENTERCOMINGINTOTHECIRCLE,ANDTHELEASTECCENTRICITYIS0001LESSECCENTRICITY,FIG7RELATIVETRACEOFJOURNALCENTERSTATICBALANCERELATIVETOHOLETHEMARGENTANGLEISTHECRANKANGLETHESYSTEMSTABILITYISWORSEANDWORSEWHENTHECRANKANGLEISAT178B192B,ITISTHESECONDTIMEFORTHEJOURNALCENTERCOMINGINTOTHECIRCLE,ANDTHELEASTECCENTRICITYIS0098WHENTHECRANKANGLEISAT302B338B,ITISTHETHIRDTIMEFORTHEJOURNALCENTERCOMINGINTOTHECIRCLE,ANDTHELEASTECCENTRICITYIS0001ANDTHEREARETWOTIMESFORTHECENTERTOUCHINGTHEOUTERCIRCLEOFE1,WHERETHEANGULARVELOCITIESOFCOUPLERANDROCKERRELATIVETOTHEBEARINGLOADFARETHESAME,BUTTHEIRDIRECTIONSAREREVERSE,ANDTHEIMPACTWILLHAPPENBETWEENTWOLINKS23BALANCEBETWEENOILFILMFORCEANDBEARINGLOADFNISTHEREACTIONFORCECOMPONENTINTHEDIRECTIONOFLINKBCLENGTH,ANDFTISTHEREACTIONFORCECOMPONENTINTHEVERTICALDIRECTIONOFLINKBCBETWEEN80BAN
编号:201311070933463291    类型:共享资源    大小:699.86KB    格式:PDF    上传时间:2013-11-07
  
1
关 键 词:
外文资料 外文翻译
  人人文库网所有资源均是用户自行上传分享,仅供网友学习交流,未经上传用户书面授权,请勿作他用。
关于本文
本文标题:外文资料--Dynamic Analysis of Fo ur -Bar Be ating -upMechanismwith Joint Cle arance.pdf
链接地址:http://www.renrendoc.com/p-93291.html
关于我们 - 网站声明 - 网站地图 - 资源地图 - 友情链接 - 网站客服客服 - 联系我们

网站客服QQ:2846424093    人人文库上传用户QQ群:460291265   

copyright@ 2016-2018  renrendoc.com 网站版权所有   南天在线技术支持

经营许可证编号:苏ICP备12009002号-5