毕业设计外文文献

《毕业设计外文文献》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、Developmentofelectro-hydraulicproportionalpowermatchsystemfortransportinggirdervehicle’sdrivingAbstract:Onthebasisofanalysisofthetheoryofmechanical-hydraulicpowermatchsystem,theelectro-hydraulicproportionalpowermatchsystemwhichissuitableformatchingTLC900tran

2、sportinggirdervehicleoftheengineisdevelopedaccordingtothedrivingforce-speedcurveandparameter,andthecontrolruleandprogramflowchartaboutitareputforward.Experimentsandpracticehaveindicatedthatthepowermatchsystemsatisfiesthecapabilityrequirementsofthetransportin

3、ggirdervehicleandisofgreatsignificancetoimproveperformanceandefficiencyofthetransportinggirdervehicle;meanwhileitisusefulforotherhugedrivingconstructionmachineries.Keywords:transportinggirdervehicle,hydraulicsystem,engine,powermatch,electro-hydraulicproporti

4、onal1.IntroductionTransportinggirdervehicleisdevelopedspeciallyforrailpassengertransportspecialline,anditslargestloadis900tons.Transportinggirdervehicleisappliedtotransporttheconcretegirderfromprefabricatedgroundtobridgeworkspotandcooperateswithspanningbridg

5、emachinetoaccomplishthebridgeworks.Meanwhile,transportinggirdervehiclecanalsotransportthespanningbridgemachinetoachievetheshort-distancetransportationbetweenbridge,whichmeetstherequirementofspanningbridgemachine’sdisplacing.Transportinggirdervehicleisalarget

6、onnagedrivingconstructionmachinery,anditsdrivingcapabilitydeterminestheoperationalquality,stabilityandsecurityoftransportinggirdervehicleintheworkingprocess.1.CorrelativecurveandparametersoftransportinggirdervehiclehydraulicdrivingsystemHydraulicdrivingsyste

7、moftransportinggirdervehicleisaclosedcircuitsystem,whichappliespump-motorcubagetimingcircuit.Thedrivingvelocityoftransportinggirdervehicleiscontrolledthroughadjustedthedisplacementofpumpandmotor,andthewheelisdrovedbymotorgearbox.Accordingtotheparametersofeng

8、ineandtyre,theforce-velocitycurveofhydraulicdrivingsystemisachieved,asshowninfigurel.Table1.Keypointsparametersofforce-velocitycurveKeypoint123Force[kN]1298854141Velocity[km/h]1.272.1810.28Flow[