瓦锡兰RT-flex柴油机

©WärtsiläLand&SeaAcademyPage1Chapter202-Dec-08RT-flexComp.&SystemsRT-flexTrainingMech.Components&Hydraulicsystems(RT-flexSpecificPartsonly)Chapter20©WärtsiläLand&SeaAcademyPage2Chapter202-Dec-08RT-flexComp.&SystemsRT-flexspecificpartsonly©WärtsiläLand&SeaAcademyPage3Chapter202-Dec-08RT-flexComp.&SystemsOverview,RT-flex50(Size0)WECS-9520,E95CylinderElectronicUnitTerminalboxesSupplyunitRailUnit(s)AutomaticfilterWECS-9520,E90ShipyardInterfaceBox(SIB)onthefreeend©WärtsiläLand&SeaAcademyPage4Chapter202-Dec-08RT-flexComp.&SystemsOverview,RT-flex58/60C(Size1)WECS-9520,E95CylinderElectronicUnitTerminalboxesSupplyunitRailUnit(s)AutomaticfilterWECS-9520,E90ShipyardInterfaceBox(SIB)onthefreeend©WärtsiläLand&SeaAcademyPage5Chapter202-Dec-08RT-flexComp.&SystemsOverview,RT-flex82C/82T(Size3)WECS-9520,E95CylinderElectronicUnitTerminalboxesSupplyunitRailUnit(s)AutomaticfilterWECS-9520,E90ShipyardInterfaceBox(SIB)onthefreeend©WärtsiläLand&SeaAcademyPage6Chapter202-Dec-08RT-flexComp.&SystemsOverview,RT-flex84and96(Size4)WECS-9520,E95CylinderElectronicUnitTerminalboxesSupplyunitRailUnit(s)ControloilPumpsAutomaticfilterWECS-9520,E90ShipyardInterfaceBox(SIB)oratthefreeend(smallerengines)©WärtsiläLand&SeaAcademyPage7Chapter202-Dec-08RT-flexComp.&SystemsAutomaticFilterFortheservo-andcontroloilsystemsnormalsystemoilisusedinsteadofaseparatehydraulicsystemforsimplifiedinstallation.Onebranchofthemainlubeoilpipeisconnectedtotheautomaticfilter.Theautomaticfilterhascartridgesofnominal6µmwheretheby-passfilterhasameshsizeof36m.Thefiltersludgegoesbacktothecrankcase.©WärtsiläLand&SeaAcademyPage8Chapter202-Dec-08RT-flexComp.&SystemsAutomaticFilterThebackflushingisautomaticallyinitiatedbythecontrolboxeitherA)standard:Timecontrolled(after1hour)B)or:ifthedifferentialpressureacrossthefilterbecomestoohigh(0.35bar)Thefiltersludgegoesbacktothecrankcase.Itisfilteredsystemoilwhichiscleanenoughfornormaluse.Inthefiltercontrolboxthebackflushingisinitiatedeitherbytimeordifferentialpressure.Flushingcyclesarecounted.Failuremessagesaregeneratedifnecessary(Overcurrent,differentialpressurehighetc…)Thereareswitches/buttonstoswitchfrom“Operation”to“Adjust”.Fordetailedinformationpleaseconsultfiltermaker’smanuals.©WärtsiläLand&SeaAcademyPage9Chapter202-Dec-08RT-flexComp.&SystemsSupplyUnitDrive,Size0SinglelobedriveThesupplyunitisdirectdrivenbythecrankshaft.Theservooilpumpsaredrivenbyindividualpinions,havinga„mechanicalfuse“(reduceddiameterinpinion),inordertoprotectthegear-driveincaseofapumpseizure.Sincethesupplyunit,i.e.fuelpumpsandservooilpumpshavenotiming,meanstheyjustsupplyfueloroil,thecamshaftdoesnothavetohaveadeterminedpositioncomparedtocrankshaft.Howeverthepositionofthecamsrelativetoeachothermustberespected.©WärtsiläLand&SeaAcademyPage10Chapter202-Dec-08RT-flexComp.&SystemsSupplyUnitDrive,Size1RT-flex58T-BRT-flex60C©WärtsiläLand&SeaAcademyPage11Chapter202-Dec-08RT-flexComp.&SystemsSupplyUnitDrive,Size2©WärtsiläLand&SeaAcademyPage12Chapter202-Dec-08RT-flexComp.&SystemsSupplyUnitDrive,Size3©WärtsiläLand&SeaAcademyPage13Chapter202-Dec-08RT-flexComp.&SystemsThesupplyunitisdrivenbythecrankshaft,viatwointermediategearwheels.3-lobecamsaremountedtothecamshaft.Theservooilpumpsaredrivenbyindividualpinions,havinga„mechanicalfuse“(reduceddiameterinpinion),inordertoprotectthegear-driveincaseofapumpseizure.Theservooilpumpgearwheelishydraulicallyfittedaswell.Sincethesupplyunit,i.e.fuelpumpsandservooilpumpshavenotiming,meanstheyjustsupplyfueloroil,thecamshaftdoesnothavetohaveadeterminedpositioncomparedtocrankshaft.Howeverthepositionofthecamsrelativetoeachothermustberespected.3-lobecamsSupplyunitgearwheelServooilpumpdrivegearwheelandpinions2ndintermediategearwheelCamshaftbearingcoversSupplyUnitDriveDrawnforSize4©WärtsiläLand&SeaAcademyPage14Chapter202-Dec-08RT-flexComp.&SystemsSupplyUnit,Size0Fuelside:The„jerk-type“fueloilpumpsdeliverfueltothefuelrail.Tokeeptherailpressure(600-900bar),thepumpflowrateisregulatedviaelectricactuators,bypressuresetpointsignalsfromWECS-9520.Servooilside:TheDynexservooilpumpsdeliveroiltotheservooilrailwithapressureof~100-200barviarisingpipes.Thenumberoffuel-andservooilpumpsdependsonthenumberofcylinders.ServooilPumpsFuelPumpsEl.Actuators©WärtsiläLand&SeaAcademyPage15Chapter202-Dec-08RT-flexComp.&SystemsSupplyUnit,Size1RT-flex60RT-flex58T©WärtsiläLand&SeaAcademyPage16Chapter202-Dec-08RT-flexComp.&SystemsSupplyUnit,Size2©WärtsiläLand&SeaAcademyPage17Chapter202-Dec-08RT-flexComp.&SystemsSupplyUnit,Size3©WärtsiläLand&SeaAcademyPage18Chapter202-Dec-08RT-flexComp.&SystemsSupplyUnit,Size4©WärtsiläLand&SeaAcademyPage19Chapter202-Dec-08RT-flexComp.&SystemsFuelside:The„jerk-type“fueloilpumpsdeliverfuelintotheintermediateaccumulator.Tokeeptherailpressure(600-900bar),thepumpflowrateisregulatedviaregulatinglinkageandel.actuators,bypressuresetpointsignalsfromWECS.Fromtheaccumulatortherearetwooutlets,connectingtheaccumulatortothefuelrailviatworisingpipes.Servooilside:TheservooilpumpsaremadebyDynexorBosch.Theydeliverservooilintoservooilcollectorblockwithapressureo