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StructureandPrincipleof

UrbanRailTransitVehiclesI.FunctionsofbogieframeTianGuiliStructureandPrincipleof

UrbanRailTransitVehiclesThebogieframeistheskeletonstructureofthebogie,whichisthebasisfortheinstallationofvariousparts.Itismainlyweldedbytheleftandrightbeamsandbeams,formingan"H"weldedframe.Someoftheframesalsohaveendbeamsatthefrontandrearends,forminga"日"shapedframe.Amongthem,thesidebeamisthemainbearingbeamstructureoftheframe,whichisusedtodeterminethewheelset’sposition.Beamsandendbeamsareusedtoensurethestiffnessoftheframeinthehorizontalplane.Structurealsohasairspringseat,electricalinstallationseat,thegearboxseat,brakeequipmentinstallationseat,tractionrodinstallationseat,heightcontrolvalveseat,antirolltorsionbar,shockabsorberandstopper.Ithasacertainstrengthwhichthroughthefixedaxlefixedpositioninbogieensurewheelbase,inheritandpassavarietyofloadandforce.Thestructure,shapeanddimensionsoftheframeshallmeettheshapeandassemblyaccuracyrequirementsofallparts.StructureandPrincipleof

UrbanRailTransitVehicles1.AccordingtothedrivingsystemAccordingtowhetherthevehiclehasadrivingsystem,itcanbedividedintotwotypes:motorcarframeandtrailerframe.Themainstructureofthetwoframesissimilar,buttheframebeamofthemotorcarhasaninstallationseatfortractionmotor,gearboxandotherdrivingdevices,whichisweldedofplatesandbeamsteeltubes,whilethetrailerframedoesnothave.StructureandPrincipleof

UrbanRailTransitVehicles2.AccordingtothestructureformAccordingtothestructureform,itcanbedividedintoopenH-shapedframeandclosed日-shapedframeand目-shapedframe,amongwhichH-shapedframeismorecommoninurbanrailvehicles.StructureandPrincipleof

UrbanRailTransitVehicles3.AccordingtotheproductionprocessAccordingtotheproductionprocess,itcanbedividedintotwoforms,caststeelframeandweldingframe.Caststeelframestructureissimpleandstrong,butthecastingprocessiscomplex,theoverallqualityislarge,intheprocessofuseislimited.Generallycaststeelframeisnotusedinurbanrailvehicles.StructureandPrincipleof

UrbanRailTransitVehiclesThecomponentsoftheweldingframeadopttheemptyboxallsteelplateweldingform,whicharelightweight,savematerial,andcanmeettherequirementsofstrengthandstiffness.Itiswidelyusedinurbanrailvehicles.Especiallypressedsteelplateweldingstructure,thebeamisaccordingtoequalstrengthdesign.Eachpartoftheboxcandesignedaccordingtothestressdistributionandsize,andthestressofeachsectionissimilar.Itcanreasonabledistributetheweldinglines,reducetheweldnumber,notonlyhavesufficientstrength,butalsoeffectivelyavoidstressconcentration,andthematerialutilizationrateishigher.Ittakeshigherrequirementsformanufacturingequipment,processingtechnologyandthecost.StructureandPrincipleof

UrbanRailTransitVehiclesIII.ThestructuralcharacteristicsoftheframeBogieframeofAbuja,urbanrailwayNigeriais"H"typeweldedframe.Thecrossbeamofmotortrainbogieframehastheinstallationseatwiththetractionmotor,gearboxandotherdrivingdevices,whilethecrossbeamoftrailerbogieframehasnoaboveinstallationseatstructure.Barriercleanersarealsoprovidedonthetrailerframewithadriver’sroomintheheadcarposition.Figure3-14showsamotortrainbogieframeofAbuja,urbanrailwayNigeria.StructureandPrincipleof

UrbanRailTransitVehicles1-Verticalshockabsorbermountsofprimarysuspension;2-Tumblernodeseat;3-Verticalshockabsorbermountsofsecondarysuspension;4-Safetycableholder;5-Heightvalveadjustingrodseat;6-Gearboxhanger;7-Motorhanger;8-Springseatofprimarysuspension;9-Side

beam;10-Beam;11-Airspringseat;12-Transversestopperseat;13-Secondarytransverseverticalhydraulicdamperseat;14-BeamconnectionFigure3-14MotortrainframestructureStructureandPrincipleof

UrbanRailTransitVehiclesThesidebeam(9)isthemainbearingbeamstructureoftheframeandisalsousedtodeterminethewheel-pairposition.Thesidebeamisaboxstructuremadeoflowalloystructuresteelplate,anditsupperandlowercoverplateisasteelplatecompressionstructure.Areinforcingplateisarrangedinsidethesidebeam.Andthepositionofthereinforcingplateissetaccordingtotheforcecondition,whichmakesthewholesidebeamsectionincrease,soastoensurethatthesidebeamhasbetterbendingandtorsionresistance.StructureandPrincipleof

UrbanRailTransitVehiclesThecrossbeam(10)isweldedbytwoseamlesssteeltubesandtwocrossbeamconnectingbeams(14),inwhichthecrossbeamconnectingbeamsarebox-shapedstructuresweldedbysteelplategroups.Tractionpullrodseat,heightcontrolstemseat(5),gearboxsuspensionseat(6),motorsuspensionseat(7)andairspringseat(11)areweldedonthebeam,etc.Tractionmotor,gearboxandotherstructuresarehungonthebeam.Undertheactionforceoftheliftingseat,thebeamshouldensuretheuniformdistributionofstress,ensurethestiffnessoftheframeinthehorizontalplane,andeffectivelyimprovethereliability.Inordertoreducethestressconcentrationandenhancetheweldingstre

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