KQYJ-1T 空气压机设计【说明书+CAD+SOLIDWORKS】
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气压
设计
说明书
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cad
solidworks
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PROCEEDINGSOFTHE7THICFDM2006INTERNATIONALCONFERENCEONFRONTIERSOFDESIGNANDMANUFACTURINGJUNE1922,2006,GUANGZHOU,CHINAPAGES253025STUDYOFTHEINFLUENCETHEINFLUENCEOFLOWENVIRONMENTPRESSUREONTHEBEARINGINICEFENGKAI,ZHANGYOUYUNANDXINHAOTHEORYOFLUBRICATIONANDBEARINGINSTITUTE,XIANJIAOTONGUNIVERSITY,XIAN710049,CHINAABSTRACTTHEINFLUENCEOFLOWENVIRONMENTPRESSUREONTHEMAINBEARINGANDBIGENDBEARINGOFICENGINEWASINVESTIGATEDBASEDONAONECYLINDERDIESELENGINEFIRSTLY,AMODELOFONECYLINDERENGINEWASSETUP,BYTHEUSEOFTHECOMMERCIALSOFTWAREEXCITEDESIGNERFROMAVLCOMPANYTHEN,ASERIESOFEXPERIMENTSWEREDONETOGAINTHEGASPRESSUREINCYLINDERUNDERDIFFERENTENVIRONMENTPRESSUREWHENTHEMODELOFTHEENGINECONSIDEREDTHEGASPRESSUREASLOAD,THEAPPLIEDLOAD,ECCENTRICITYRATIOANDFRICTIONLOSSOFTHEMAINBEARINGANDTHEBIGENDONEWERECALCULATED,WITHTHERESULTSVALIDATEDBYTHEEXPERIMENTSTHECALCULATIONRESULTSSHOWTHAT,WITHTHEDECREASEINENVIRONMENTPRESSURE,THEAPPLIEDLOADOFMAINBEARINGANDBIGENDONECHANGE,ANDTHEECCENTRICITYRATIOVARYREGULARLY,WHILETHEIRFRICTIONLOSSDECREASEALITTLEKEYWORDSICENGINELOWENVIRONMENTPRESSUREBEARINGLOADECCENTRICITYRATIOFRICTIONLOSS1INTRODUCTIONMOSTOFWESTERNCHINAISHIGHALTITUDEPLATEAUASTHEINCREASEOFALTITUDE,THEAIRPRESSUREANDAIRDENSITYDECREASE,THEAIRDRAWINTOTHEENGINEREDUCESANDTHECOMBUSTIBLEMIXEDGASBECOMESTOODENSE,SOTHECOMBUSTIONPROCESSBECOMESWORSEANDDYNAMICBEHAVIOROFTHEENGINEDETERIORATESIGNIFICANTLY1UNDERTHISWORKINGCONDITION,THEPERFORMANCEOFBOTHTHEMAINBEARINGANDCONCORDBEARINGWILLBEAFFECTEDBYTHEDROPOFAIRPRESSURESOTHERESEARCHONTHEWORKINGCONDITIONOFENGINEMAINBEARINGANDCONCORDBEARINGUNDERWESTERNLOWPRESSUREENVIRONMENTHASIMPORTANTGUIDINGSIGNIFICANCEFORTHEDESIGN,MANUFACTUREANDMAINTENANCEOFENGINESWORKINGUNDERWESTERNENVIRONMENTATPRESENT,RESEARCHDOCUMENTSONENGINECOMBUSTIONPROCESSANDDYNAMICSINFLUENCEATDIFFERENTALTITUDEAREUSUALATHOMEANDABROAD23,BUTNOSYSTEMATICRESEARCHWORKONTHEINFLUENCEOFLOWAIRPRESSURETOTHEENGINEBEARINGAPPEARSINTHISPAPER,SINGLECYLINDERENGINEMODELCONSIDEREDTHEINFLUENCEOFAIRPRESSUREISCONSTRUCTEDUSINGTHECOMBUSTIONGASPRESSUREMEASUREDTHROUGHEXPERIMENTUNDERDIFFERENTENVIRONMENTPRESSUREANDDIFFERENTROTATESPEEDASTHEINPUTLOADINGCONDITIONOFTHEMODEL,THECHANGEOFTHEWORKINGCONDITIONOFMAINBEARINGANDCONCORDBEARINGALONGWITHTHEENVIRONMENTAIRPRESSUREUNDERDIFFERENTROTATESPEEDISCALCULATEDWITHBUSINESSSOFTWAREEXCITEDESIGNEROFAVLCOMPANY,ANDTHERESULTISCOMPAREDANDVALIDATEDWITHTHEEXPERIMENTALLOCUSOFJOURNALCENTER2THEPROCESSINGMETHODOFLOWAIRPRESSURETHEINFLUENCEOFPLATEAULOWAIRPRESSURETOTHEPERFORMANCEOFENGINEBEARINGMAINLYCOMESFROMTHEDETERIORATIONOFTHEENGINEDYNAMICBEHAVIORINTHISPAPER,AWESTERNENVIRONMENTSIMULATIONENGINETESTRIGISUSEDTOSIMULATEPLATEAULOWAIRPRESSUREANDMEASURETHEINFLUENCEOFLOWAIRPRESSURETOTHEENGINETHEKEYTECHNOLOGYOFSIMULATINGLOWAIRPRESSUREENVIRONMENTISHOWTOSIMULATEANDADJUSTTHEINTAKEPRESSUREOFTHEENGINE4THEEXHAUSTPRESSUREANDTHEPRESSUREINTHECRANKSHAFTCASEARENOTSIMULATEDINTHISTESTSYSTEM,ANDTHESEWORKSWILLBEDONELATERONINTHEEXPERIMENT,THEINFLUENCEOFDIFFERENTINTAKEPRESSUREONTHEPRESSUREINTHECYLINDERISMEASUREDANDTHEPRESSUREVALUEISLOADEDTOTHEMODELCONSTRUCTEDBELOW,ANDTHENTHEINFLUENCEOFLOWPRESSUREONTHEPERFORMANCEOFENGINEBEARINGISWORKEDOUTTHESTRUCTUREOFTHETESTRIGISSHOWEDINFIG1THROUGHTHECONTROLOFENGINEINTAKEPRESSURE,THESIMULATIONCASECANSIMULATETHEWORKINGCONDITIONOFTHEENGINEUNDERDIFFERENTENVIRONMENTAIRPRESSURETHENTHEPRESSUREINTHECYLINDEROFTHEENGINEISMEASUREDBYTHEHIGHPRESSUREANDHIGHTEMPERATUREPRESSURESENSORIMPLEMENTEDINTHECYLINDERDUETOTHERESTRICTIONOFEXPERIMENTALCONDITION,THEECCENTRICITYOFTHEMAINBEARINGCANNOTBEMEASUREDDIRECTLY,SOTHELOCUSOFJOURNALCENTEROFTHEFLYWHEELISMEASUREDWITHVORTEXSENSOR,ANDITSECCENTRICITYISWORKEDOUTTOREPLACETHATOFTHEMAINBEARINGTOVALIDATETHECOMPUTATIONALMODELTHEREAREVARIOUSFACTORSWHICHAFFECTTHECOMBUSTIONGASPRESSUREINTHECYLINDER,AMONGWHICHENVIRONMENTAIRPRESSURE,ROTATESPEEDANDLOADAREESPECIALLYIMPORTANTCONSIDERTORUNTHEENGINEWITHNOLOADTHEENGINEMAINLYDOWORKTOOVERCOMEFRICTIONANDMEASUREFIG1VIEWOFTHESIMULATIONTESTRIGSPONSOREDBYNATIONALNATURALSCIENCEFOUNDATIONOFCHINA26THEPRESSUREINTHECYLINDERUNDERDIFFERENTROTATESPEEDANDDIFFERENTENVIRONMENTPRESSUREFIG2SHOWSTHEPRESSUREINTHECYLINDERUNDERDIFFERENTENVIRONMENTAIRPRESSUREAT1000R/M3THEINFLUENCEOFLOWAIRPRESSUREONTHELOADOFENGINEBEARINGS31FORCEANALYSISOFTHEPISTONSHAFTINGSYSTEMINORDERTOSIMPLIFYTHEMODEL,ITISASSUMEDTHATTHEPISTONPINANDROTATEAXISOFTHECRANKSHAFTAREALLONTHECENTRALLINEOFTHEPISTONTHENTHEFORCEANALYSISOFTHEENGINEPISTONSHAFTINGISSHOWEDINFIG3THEGASPRESSUREINTHECYLINDERFZISDISASSEMBLEDTOTHEBEARINGFIG3PISTONSHAFTINGFORCEANALYSISANDINERTIALFORCEANALYSIS2211COS1SINSSZZFFFF122SINTAN1SINNNZZFFFF2222SINCOSCOSCOS1SINRZZFFF322SINSINCOSSINCOS1SINRZZFFF4FZISTHECOMBUSTIONGASPRESSUREINTHECYLINDER,THEINPUTLOADOFTHEMODELFTANDFRARETHEFORCESAPPLIEDONTHECONCORDBIGENDBEARINGFZANDFSARETHEFORCEAPPLIEDONTHEMAINBEARING32INERTIALFORCEANALYSISOFTHEPISTONSHAFTINGINTHISPAPER,TWOKINDSOFINERTIALFORCEARECONSIDEREDASSHOWNINFIG31ROTATEINERTIALFORCEALONGTHECRANKSHAFTRADIALDIRECTION21STAND2NDORDERRECIPROCALINERTIALFORCEALONGTHEPISTONCENTRALAXISDIRECTIONDISASSEMBLETOCOORDINATESYSTEM02010C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NFROMTHESHAPEOFTHETWOGRAPHICSANDTHEORDEROFTHEMARKEDPOINTTHATBOTHOFTHEMAREMOVINGACCORDINGTOTHEDIRECTIONINFIG9FROMATOB,CHINTURNCOMPAREDTOFIG8A,POINTA,GANDHINFIG8BDEFLECTALITTLETOTHERIGHT,ANDPOINTFDEFLECTSSLIGHTLYUPTHISISMAINLYCAUSEDBYTHEDISTORTIONOFTHECRANKSHAFTTHROUGHTHEANALYSISANDCOMPARISONOFTHETWOFIGUREABOVE,WECANSEETHATTHEMOVEMENTRULEOFTHETWOECCENTRICITYARECONSISTENT,ANDTHESHAPEOFTHEMARESIMILARTOSOMEEXTENTSOWECANCOMETOTHECONCLUSIONTHATTHECOMPUTATIONALRESULTISVERIFIEDCORRECTANDCREDIBLETHROUGHEXPERIMENT7CONCLUSIONINTHISPAPER,SINGLECYLINDERENGINEMODELCONSIDEREDTHEINFLUENCEOFLOWAIRPRESSURETOTHEMAINBEARINGANDCONCORDBIGENDBEARINGISCONSTRUCTEDANDVERIFIEDTHROUGHEXPERIMENTGENERALLY,THEHIGHERTHEROTATESPEEDOFTHEENGINE,THEMORESENSITIVETHEDEFLAGRATIONLOADOFTHEMAINBEARINGANDTHECONCORDBIGENDBEARINGTOENVIRONMENTAIRPRESSUREBUTWHENTHEENVIRONMENTAIRPRESSUREDECREASESTOACERTAINEXTENT,ITSINFLUENCETOTHEDEFLAGRATIONLOADOFTHEMAINBEARINGANDTHECONCORDBIGENDBEARINGOFHIGHROTATES
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