Main Engine Alignment on Board

Main Engine Alignment on Board

ID:39773481

大小:1.96 MB

页数:66页

时间:2019-07-11

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1、MainenginealignmentAlignmentonboardToobtainoptimalparametersforserviceconditions•Enginecrankshaftstraightinservicecondition•Bearingloadofallmainenginebearingsandpropellerlineinserviceconditiontobewithinspecifiedlimits•Acceptablecrankshaftdeflectionsinservicegoingcondition•Thrustshaftloaddiagramtobef

2、ulfilled2730/MRA2004-06-111MainenginealignmentTocompensateasmuchaspossiblechangesbetweenalignmentandservicecondition:a)Hulldeflectionb)Enginetemperaturec)Drydock/afloat2730/MRA2004-06-112MainenginealignmentCold,aligningconditionsServiceconditions2730/MRA2004-06-113MainenginealignmentEnginestructured

3、eflectionduetoheatingup(Enginealignedinstraightondition).2730/MRA2004-06-114MainenginealignmentEnginestructuredeflectionduetoheatingup(EnginealignedwithSAG).2730/MRA2004-06-115MainenginealignmentTraditionalGAP/SAGmainenginealignmentbeforechocking(drydock,notcoupledandmainengineinstraightcondition).N

4、otrecommendedprocedureEnginealignmentwascarriedoutasfollows:•Vesselindrydockorafloathowever•Engineinstraightcondition(crankshaftdeflectionverification)•Enginenotcoupledtotheshaftingsystem•EnginecoldAndthentheenginewaschocking.2730/MRA2004-06-116MainenginealignmentMANB&Wrecommendedmainenginealignment

5、beforechocking(afloatcondition,coupledtoshaftingsystemandmainengineinsaggedcondition).RecommendedprocedureAtpresentMANB&WDieselrecommendedprocedurepriortochockingis:•Vesselinafloatcondition•Engineinsaggedcondition(pianowireverification).•Enginecoupledtotheshaftingsystem.Thatistocontrolthecrankshaftd

6、eflectionofthelastunitandtheengineaftendstaticload.•Enginecold.2730/MRA2004-06-117MainenginealignmentRecommendedfinalalignmentprocedureBeforechocking:Requiredalignmentbeforecouplingofshaftflanges:a)AdjustmentofSAGandGAPatflanges(acc.tocalculationsofshaftlinealignment)b)AdjustmentofbedplateSAG(pianow

7、ireverification)c)Adjusttwistd)Checkcrankshaftdeflectione)CheckjournalbearingtopclearanceRecommendedcheckaftercoupling,beforechockingf)Bearingloadsofatleast:foremoststerntubebearing(ifexists),intermed

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