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1、WD615系列柴油机曲轴、活塞、连杆机构WD615seriesdieselenginecrankshaft,pistonandconnectingrodmechanism.Txtmature,nottheheartbecomesold,butthetearsintheeyes,butstillkeepsmiling.Itisnoteasytodoalltheordinarythings,notonlytheordinary,butalsotodoallthesimplethingsright.Crankshaft,pistonandconnectingrodmechanismofWD615
2、seriesdieselengineWD615seriesdieselengineadoptsconventionalcrankshaftconnectingrodmechanism.WD615engineadoptsdieforgingcrankshaft,thecrankshaftsurfacehasbeentreatedbyspecialheattreatmentandsoftnitriding,soithasbetterwearresistanceandfatigueresistance.Crankshaftandconnectingrodjournalellipticitysho
3、uldbelessthanorequalto0.01mm,themaximumvalueiso.015mm,thetapershouldbelessthanorequaltoo.01mm,themaximumvalueiso.015mm.TheeccentricityofthecrankshaftintermediatejournalrelativetothetwoendsoftheJournal(crankshaftbending)O.3mm.The196kwcanbefittedwithasiliconeoilshockabsorberwithadiameterofWest260mm.
4、ThecrankshaftofotherlargehorsepowerdieselenginescanbefittedwithasiliconedamperoftheWest280mm.Thefrontofthecrankshaftisheatedwithshockabsorbers,fixedflangesandcrankshaftgears.Thecrankshaftgearshallbeheatedto180degrees,whilethefixedflangeshallbepaddedto290degreescentigradeandthenheatedintothecranksh
5、aft.ThesevenmainbearingcrankshaftisthicksteelbacklowAluminumAlloymadetwointerchangeablemoldova.Thethrustpadismountedonbothsidesofthesecondmainbearings.Theborediameterandjournaldimensionsmustbemeasuredintheassembly.TheoptionalmainbearingmainbearingradialclearanceisO.095mm~O.163mm,limittheuseof0.18m
6、m.Maximumunbalanceofdynamicbalance,609/cm.Theaxialclearanceofthecrankshaftiso.052mm-o.255mm,andtheservicelimitisO.35mm.Theconnectingrodismadeofdifferentthicknesssteelbackandlowtinaluminumalloy.Crankshaftandflywheelforhighstrengthboltconnection,wheninstallingflywheelfirst60Nmtorquetighteningandalls
7、ymmetric,symmetricrotatingbolt90.+5.Andthenturn90.+5.Andconfirmthatthefinaltorquereaches230Nmmto280N.Thosewhofailtoreachthefinaltorqueshallbereplaced.Flywheelboltscanbereused2times.Thepistonsaremadeofaluminiumall
