连杆机构-外文文献.doc

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连杆机构-外文文献.doc

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附录

Theroleoflink

Theroleofthepistonrodtowithstandtheforcepassedtothecrankshaft,andtotherec-iprocatingpistonmotionintorotarycrankshaftmotion.Bodybytheconnectingrodconnec-tingrod,connectingrodcap,connectingrodboltsandconnectingrodbearingandotherparts,connectingrodconnectingrodbodyandtheconnectingrodcapintoasmallhead,sha-ftandconnectingrod.Connectingrodsmallendisusedtoinstallthepistonpintoconnectthepiston.Connectingrodisconnectedwiththecrankshaftrodjournal.Generallymadeofseparatetype,andcuthalfoftheknownlinkshaftcover,bothbytheconnectingrodboltsin-toone.Installedintheconnectingrodconnectingrodbearingholeintheseat,andcrankmountedontherodjournalandtogether,theengineofthemostimportantonewiththevice.Usedmainlybyrunwhtegoldalloy,copper-leadalloyandaluminumalloy.

Linkageinbothendsofthehingewiththeactiveanddrivencomponentstotransmitmotionandpowerbars.Forexample,inpowermachineryandreciprocatingpistoncompre-ssorwithapistonandconnectingrodtocrank.Mostlysteelrod,themainpartofthemulti-section-shapedorround,bothendsofthehole,holefittedwithbronzebushingsorneedlebearingsfortheloadaxisconstitutehingepins.Automobileengineconnectingrodisanimp-ortantpart,whichconnectsthepistonandcrankshaft,itsroleistopistonreciprocatingmovementintorotarycrankshaftmotion,andtheforceactingonthepistontothecrankshaftoutputpowertopass.Linkatwork,inadditionwithstandthepressuregeneratedbygascombustion,butalsotowithstandtheverticalandhorizontalinertiaforce.Therefore,theconnec-tingrodinacomplexstateofstressatwork.Bothsubjecttoalternatingtensionandcompre-ssionstress,butalsobythebendingstress.Themaindamagetotherodformoffatiguefrac-tureandexcessivedeformation.Usuallythesiteoffatigu