立式螺旋开沟器土槽试验装置的试验-研究与其优化设计

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1、江苏大学硕士学位论文ABSTRACTTrencherisoneofthemainagriculturalmachinerytypesforexcavationoffarmlandirrigationanddrainageditchesinordertocreateagoodenvironmentforcropgrowth．Inrecentyears，verticalspiralditcherhasbeenwidelyusedintrenchingoperationforitsadvantagessuchassimplestructure、compactcomponentsandhighope

2、ratingefficiency．Thehelicalcuttingtoolisthemainworkingpartofscrewditcher,anditspowerconsumptionistheimportantparameterthatneedstobetakenintoconsiderationintheprocessofdesigningatrencher．Inthispaper,al【indofsoil-bintestdeviceofverticalspiralopenerwasdevelopedaccordingtotheworkingcharacteristicsofver

3、ticalspiralditcher．Theresearchofsoilcuttingwasconductedbythetestdeviceandnumericalsimulationandoptimizationofforwardspeed、rotationalspeed、openingfurrowangleanddepthoffurrowwascarriedoutbasedontheexperimentresults．Themainresearchcontentsandresultsincludethefollowingthreeaspects：1)Thedesignofsoil-bin

4、testdeviceofverticalspiralopener．Akindofsoil—bintestdeviceofverticalspiralopenerhasbeenself-developedwhichconsistsofthemechanicalsystemandthemeasurementandcontrolsystem．Thekeydevicesofmechanicalsystemincludesditching、liftingandangleadjustingdevice．TheresearchofsoilcuttingCanbecarriedoutinanyrandomc

5、ombinationwithinthescopeinwhichtheforwardspeedis0-36m／min、rotationalspeedis0-470r／min、openingfurrowangleis0-30。anddepthoffurrowis0-430mm．ThemeasurementandcontrolsystembasedonLabVIEWCanadjusttherotationalspeedandveerofditchingandwalkingmotorsandacquire、analyze、displayandsavetorqueandrotationalspeedw

6、ithhighefficiency,whichhasgoodmaneuverabilityandhuman-computerinteractioninterface．2)Numericalsimulationofhelicaltoolcuttingsoilandstructureoptimization．ExplicitdynamicsofthehelixtoolcuttingthesoilwascarriedoutbasedonLS-DYNA．TheFE／SPHcouplingalgorithmwasadoptedfornumericalsimulationofIII立式螺旋开沟器土槽试验

7、装置的试验研究及其优化设计thehelicaltoolcutting，liftingandthrowingthesoil．TheresultsofsimulationwasanalyzedthroughusingLS--PREPOSTpost--processingtoolandcometotheconclusionthatthemaximumyonstressoccurredintheconnectiono