玉米脱粒机的译文英语Word下载.docx
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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
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