玉米脱粒机的译文英语Word下载.docx

玉米脱粒机的译文英语Word下载.docx

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1.introduction

CornisChina'

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）

Onthebasisofthe"

tenth-five"

nationalresearchtacklekeyproblemsinscienceandtechnologyresearch,inthisarticle4YQZ-3Acombineharvesterwasdesigned,whichcombinesexistingcornharvestandcornsilagemechanizationtechniqueandimprovesthedesignandoptimizesthecombinationforeachworkingdevice.Duringtheofharvestcornear,the4YQZ-3Acombineharvestercanalsocompletecutting,conveying,choppingcollectionandrootcropbrokentasksandsoon;

Withthepopularizationandappli-cationofthistechnique,wecansolvetheproblemofcornstrawrecoveryandreducethewasteofstrawresourcesandimprovetheenvironmentandsoilpollutioncausedbystrawburning.Thereinto,thestrawrecoverycanprovidehighqualityfeedforlivestockandreducetheexcessivedependenceonpasture,sothistechniquehasimportantpracticalsignificancetoourcountry'

sincreasinglydevelopinganimalhusbandryandrelatedindustries.

2.OverallInstitutionsandMainTechnicalIndicators

2.1.WholeStructureandWorkPrinciple

Asshowninfigure1,4YQZ-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.TechnologyIndexoftheMachine

Accordingtotherequirementsofthechoppingandensilingcraftofthecornstalksandthefunctioncharacteristicsoftheprototyperequirements,ThemaintechnicalparametersaredeterminedasisshowninTable1.

Table1.Themaintechnicalparametersof4YQZ-3Acombineharvester

Parameters

Numericalvalue

Boundarydimension（length×

width×

height）/mm

7100×

2500×

3600

Minimumground

clearance/mm

210

Entiremachineweight/kg

5090

RevolvingspeedofspikePickingroller/r•min-1

1080

MatingPower/kW

88.2

RevolvingspeedofStalkschoppingmachine/r•min-1

2100

NumberofHarvestrows/row

3

Forwardspeedofthehavester/km•h-1

1.3~3.5

Adaptedlinespacing/mm

500~800

Theoreticalproductivity/

hm2•h-1

0.638

Figure1.4YQZ-3ofmaizeunitedharvestmachinestructureschematicdrawing

3.MainWorkingPartsDesign

3.1GrippingDeliveryMechanism

Asfigure2shows,grippingdeliverymechanismaremainlymadeofpositivefeedingchain,passivesprocket,tensiondevice,clampingboard,conveyingchainanddrivesprocket,etc.Whenthemachineareworking,milpaaredevidedandliftedupbynearsidedivider,andthendrivesprocketaredrivenbypassivesprocketandforcefeedingchaintorun,soastoturnmilpatogrippingdeliverychains,Inthemeanwhile,cutterbarcutoffthemaizeplants,thebrokenplantsconveyingchainandconveyingdialgrippingunderthecommonfunctionofbluegrasschainconveyorbackintopickspikeroller;

Tensiondeviceisusedtoadjustthetensionerdegreeoftheconveyorchainsoastomaketheclampingstalksofclampingconveyingchainmorestableandreliable.

3.1.1.PositivefeedChain

Positivefeedchainislocatedbelowthenearsidedivider,dedicatedtocooperatingwithittoforce-feedthecornplantswithdifferentLinespacing.Theselectionofthespeedofpositivefeedingchainhaveagreateffectonplantsclampingtransmission.Excessivespeedwillmakeplantsclampingfeedingwithinthesamelines,causingthephenomenonsuchasstembeingcutofforjamedoccur;

however,thelowspeedmaymakethefunctionofFeedingchaindisapper.

Figure2.Shetchofgrippingdeliverymechanism

1.positivefeedingchain2.Passivesprocket

3.Tensioningdevise4.Grippingboard5.Conveyorchain

Theoretically,thespeedofthepositivefeedingchain,thelevelpointsspeedshouldbeequalto,,themarchingspeedofthemachine,butinactualworkprocess,theinfluencefactorsofthespeedofpositivefeedingchaininclude:

mv_,thefrontrakeofpositivefeedingchain,_,aperturehasforcedfeedingspeedchainofAngle,before,andconditions,etc.Inordernottomakethemachinepushdownthestemwhenitismarching,thelevelpointsspeedofthepositivefeedingchainshouldbegreaterthan,themarchingspeedofthemachine.

Figure3.Velocitydecompositionofconveyingchain

3.1.2GrippingDeliveryChain

WhileGrippingconveyingchainisworking,itisnecessarytoensurethatthecuttedplantsaretransportedtospikepickingrollertimelyandreliable,andmaintainedacertaindistancebetweenthetransportedplants,tomakespikepickingrollerloadevenly.DuringWork,selectmaizeplantstomakevelocityanalysisindotoingrippingchain,justasfig.3shows.wv,itsabsolutevelocityisinducedasfollows:

（1）

（2）

Where:

thespeedofgrippingchain;

Andby:

（3）

Bytype

（2）and（3）weknowthat:

（4）

KnownbyType（4）,While

theabsolutevelocity,

pointinthedirectionofclampingchain（bacward）andmakeAngle

withhorizontalline;

While

Absolutespeedandstalkswillmoveforwardacertainangle,whichwillgoagainstconveyingthecornplantssmoothly.Combinedwiththeperformancetestingofgrippingconveyinginthefield,whenthesizeof

belongsto10°

〜20°

，

，thisisthebestsituation.

3.2VerticalPickingandChoppingCutter

Verticalpickingandchoppingcutterisacriticalcomponentofpickingbothspikeandstem,asshownInfigure4,thisdeviceismainlymadeupofaVerticalspikepickingroller,fixedknife,movingknife,Choppingcylinder.etc..

Figure4.Verticalpickingandchoppingcutter

1.Verticalspikepickingroller2.Verticalstempullingroller

3.Movingblade4.Thefixedknife5.Choppingcylinder

3.2.1TheSchemeofPowerDrive

TheSchemeofPowerDriveofVerticalpickingandchoppingcutterisshowninfigure5.Whenitworks,powerdrivenbyengineslowdowntotheinputaxisofchoppedgearboxthroughthepulleysanddoublesprocket,thepowerdriveshreddingmechanismtorunthroughasetofbevelgear;

leftbehindthechopgearboxthereareagroupofdrivingchain（chainwheelofmiddlesizeandlargesize）transmitthepowertospikepickingchoppedgearboxandthendividethepowertostempullingrollerearthebevelgearofthespeedchangingbox;

Abovethestempullingrollerandspikepickingareagroupofdrivingchains,thepoweristransmittedfromstempullingrollertospikepickingrollertopickthespikes.InTheinputaxisofthespikepickinggearboxliesthesmallchainwheelandpulley,itfunctionsastransmittingthepowertoclustertransportationreciprocatingtypecutter.

3.2.2VerticalSpikePickingRoller

Verticalspikepickingiscompletedwhilecorneararedrooping,comparedtotheaverageHorizontalspikepicking,thepickedclustercanquicklybreakawayfromspikepickingroller,greatlyreducethebreakagerateandthelossrateofgrain.Inordertostrengthentheabilitystempullingandspikepicking,behindthespikepickingrollerareinpairsstempullingroller,canpullstemwhilestalks,forc