玉米脱粒机的译文英语

DesignandExperimentof4YQZ-3ACombineHarvesterforCornZhangXiruiDongYoufuZhangDaolin(SchoolofMechanicsandElectricsEngineeringHainanUniversityDanzhou,[e-mail])Abstract—Duetotheproblemofthelowretrievingrateofstrawwhileharvesting,fodderwentsortinstockraisingandtoovercomethepracticalproblemofcornharvesterreapingbothcornstalkandspikewhileinoperation,4YQZ-3Acombineharvesterwasdesigned,analyzedandtheparametersofkeycomponentswerepointedoutforbettergrippingdeliverymechanism,verticalpickingandchoppingcutter,helicinaeandthrowingapparatus.Duringthecornharvestingseason,numerousperformancetestingandtheproductionassessmentwerecarriedoutinthefield.Resultsachievedfromtheexperimentindicatethatthewholemachinehasbetterperformanceandcanaccomplishreapingbothcornstalkandspikewell.Keywords-cornharvester;pickingandthreshingharvester;design;Experiment1.introductionCornisChina'ssecond-largestfoodcrop,occupiesanimportantpositioninfoodproduction[1].Maizestrawcontainsalotofcrudeprotein,crudefatandfibernutrientcomponent,etc.Thusitisoneofthemostperfectforageofhighqualityinanimalhusbandry.Thenationalannualproductionofcornstrawisabout60,000tons,whichisahugepotentialforagesource[4].Cornharvesterreapingbothcornstalkandspikecancompletetheharvestofcornearandstalkswithinonetime,soithassignificanteconomic,socialandeco-systemefficiency[5-6].Atpresent,cornharvesterreapingbothcornstalkandspikestilldevelopsveryslow,andthedomesticmodelmainlyarehangingtype.Becauseofunderpowered,lowproductionefficiencyandstrawcleanness,ithasnotbeenrapidlypromoted[7-8].ForeignmodelsaremainlyUkrainianKCKY-6CornharvestmachineandCornStarseriesunitedharvestmachinedevelopedbyKempeCo.inGerman,duetountidystubbleheightandhigherprice,thistypeofair-craftisnotsuitableforChina'snationalconditions[9-11].Foundationitem:Publicbeneficial(agriculture)Scienceresearchfundissue(200903059-04)Onthebasisofthetenth-fivenationalresearchtacklekeyproblemsinscienceandtechnologyresearch,inthisarticle4YQZ-3Acombineharvesterwasdesigned,whichcombinesexistingcornharvestandcornsilagemechanizationtechniqueandimprovesthedesignandoptimizesthecombinationforeachworkingdevice.Duringtheofharvestcornear,the4YQZ-3Acombineharvestercanalsocompletecutting,conveying,choppingcollectionandrootcropbrokentasksandsoon;Withthepopularizationandappli-cationofthistechnique,wecansolvetheproblemofcornstrawrecoveryandreducethewasteofstrawresourcesandimprovetheenvironmentandsoilpollutioncausedbystrawburning.Thereinto,thestrawrecoverycanprovidehighqualityfeedforlivestockandreducetheexcessivedependenceonpasture,sothistechniquehasimportantpracticalsignificancetoourcountry'sincreasinglydevelopinganimalhusbandryandrelatedindustries.2.OverallInstitutionsandMainTechnicalIndicators2.1.WholeStructureandWorkPrincipleAsshowninfigure1,4YQZ-3Acombineharvesterforcornismainlymadeupofgrippingdeliverymechanism,spikepickingdevice,stemshreddingmechanism,castcylinder,spikecollectingbox,stemcrushingbox,counters-fielddeviceandhelicinaeanddeliveryapparatusofstalks,etc.Thismachinecanoncecompletedthepicking,risingandtransportation,settingintothebox,stalkscutting,conveying,chopping,throwingandcollectionandrootcropcrushingofcorngrain.Whilethemachineskisoperating,nearsidedividersubdividedmaizeplants,reciprocatingcuttercuttheplants,clampingchainclampsmaizeplantsofwhichrootissunderedandthenconveythemtoverticalspike-pickingrollertopickofftheear,thecornearareconveyedtothespikecollectingboxbythedeliverymechanism;Stalksarechoppedbyverticalhobbehindthestempullingroller,andthenarecastedbycastingdevicetostemcrushingbox;andcornrootarebrokenbycounters-fielddevice.2.2.TechnologyIndexoftheMachineAccordingtotherequirementsofthechoppingandensilingcraftofthecornstalksandthefunctioncharacteristicsoftheprototyperequirements,ThemaintechnicalparametersaredeterminedasisshowninTable1.Table1.Themaintechnicalparametersof4YQZ-3AcombineharvesterParametersNumericalvalueParametersNumericalvalueBoundarydimension(length×width×height)/mm7100×2500×3600Minimumgroundclearance/mm210Entiremachineweight/kg5090RevolvingspeedofspikePickingroller/r•min-11080MatingPower/kW88.2RevolvingspeedofStalkschoppingmachine/r•min-12100NumberofHarvestrows/row3Forwardspeedofthehavester/km•h-11.3~3.5Adaptedlinespacing/mm500~800Theoreticalproductivity/hm2•h-10.638Figure1.4YQZ-3ofmaizeunitedharvestmachinestructureschematicdrawing3.MainWorkingPartsDesign3.1GrippingDeliveryMechanismAsfigure2shows,grippingdeliverymechanismaremainlymadeofpositivefeedingchain,passivesprocket,tensiondevice,clampingboard,conveyingchainanddrivesprocket,etc.Whenthemachineareworking,milpaaredevidedandliftedupbynearsidedivider,andthendrivesprocketaredrivenbypassivesprocketandforcefeedingchaintorun,soastoturnmilpatogrippingdeliverychains,Inthemeanwhile,cutterbarcutoffthemaizeplants,thebrokenplantsconveyingchainandconveyingdialgrippingunderthecommonfunctionofbluegrasschainconveyorbackintopickspikeroller;Tensiondeviceisusedtoadjustthetensionerdegreeoftheconveyorchainsoastomaketheclampingstalksofclampingconveyingchainmorestable