氣門導(dǎo)桿油封密封性能的研究.pdf

1、青島理工大學(xué)碩士學(xué)位論文氣門導(dǎo)桿油封密封性能的研究姓名：李莉英申請學(xué)位級別：碩士專業(yè)：機(jī)械工程指導(dǎo)教師：林晨201112青島理工大學(xué)工程碩士學(xué)位論文AbstractWiththerapiddevelopmentofautomobileindustryusersofthereliabilityoftheengineassemblysealing，etchavebecomeincreasinglydemandingValvesealasth

2、eenginevalvegrouponeoftheimportantpartsfortheenginevalveguidesealstopreventoilintotheintake，exhaustpipe，resultinginthelossofoil，andgasolineandairmixturetopreventgasleaksandemissions，whilepreventtheengineoilintothecombust

3、ionchamberValveseals，oilsealsareoneGenerallyfromtheoutsideframeandfluorineCO。vulcanizationofrubberdiametermouthloadedselftighteningspringorwireValvesealofthestateworktodointhevalveguiderodspeedreciprocatingmotion，inconta

4、ctwithgasolineandoil，themaximumtemperatureupto200℃Thereforevalvesealsneedtoadoptgoodheatresistanceandoilresistanceofthematerial，thegeneralproductionofmaterialsforthefluorinerubberValvetomeetthevalveguidesealsandlubricati

5、onbetweentheguidesleeve，mustsupplyasmallamountofoil，butalsotopreventexcessiveoilintothecylindercombustionchambercalledthecontrolflowcanbesealedValvesealdesignparametersiscriticaltoitsseal，thesealinglipofsharpcomersorroun

6、dedshapeisdesigned，springcentertothesmallestdiameterofthe1iDfromtheRvalueoftheaxialsizeandliptooamountofinterference，tweciprocatingmotionofthepointofviewareanimportantfactoraffectingthesizeoftheflowLipsharpcomers，theinit

7、ialsealisgood，butnolubrication，wearlowlifeLiDroundedofftobigflowsmallflowofasmallfilletThesizeofthespringforceistoimproveseallifeguidekeyNowwiththecontinuousimprovementofautomotiveenginespeed，andtheimprovementofdischarge

8、，thevalvesealtowithstandharshworkingconditionshavebecomeincreasinglydemanding，itrequiresthevalvesealshouldbeabletowithstandhightemperature，highspeedandotherworkingconditions，andthereis仔ictionresistance，wearlongservicelif

9、e，resistancetomedium，sealedandreliableperformanceForthispurpose，foreignanddomesticenginemanufacturers，factorVsealed，andsomeprofessionalresearchinstitutes，hasbeenworkingtoimproveperformanceandimprovedvalvesealmaterialsoil