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采用剥离器收割台的联合水稻收割机.pdf

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采用剥离器收割台的联合水稻收割机.pdf

ATHAIMADE108KWRICECOMBINEHARVESTERWASMODIEDBYREPLACINGTHECUTTERBARSYSTEMWITHASTRIPPERHEADERTHEPOWERREQUIREMENTOFTHEMODIEDMACHINEWASMEASUREDATNOLOADANDDURINGELDOPERATIONTHESTRIPPERHEADERSYSTEMCONSISTEDOFA3MWIDESTRIPPINGROTOR,AMETALHOODANDANADJUSTABLENOSETHEOUTERDIAMETEROFTHESTRIPPINGROTORWAS450MMTHESTRIPPINGROTORCONSISTEDOFEIGHTRUBBERBLADESXEDONANOCTAGONALDRUMWITHEACHBLADEHAVING71TEETHTHEWORKRATEANDHARVESTINGLOSSESWEREMEASUREDTOEXAMINETHEELDPERFORMANCEOFTHEMODIEDMACHINERESULTSOBTAINEDFROMTHETESTSHOWEDTHATTHEPOWERREQUIREMENTFORTHEWHOLEMACHINEDURINGELDOPERATIONAT1600MIN1WAS58KWTHETHRESHING,TRACTIONANDSTRIPPERHEADERUNITSCONSUMED114,228AND169KW,RESPECTIVELYANDTHEPOWERTRANSMISSIONLOSSWAS69KWFORSTANDINGCROP,THEAVERAGEELDCAPACITYOFTHEMACHINEWAS066HAH1WITHACORRESPONDINGELDECIENCYOF74INALODGEDCROPCONDITION,THEAVERAGEELDCAPACITYWASFOUNDTOBE03HAH1WITHACORRESPONDINGELDECIENCYOF72THETOTALGRAINLOSSOFTHEMACHINEWAS4OFGRAINYIELDINTHESTANDINGCROPCONDITIONAND56INTHELODGEDCROPCONDITIONNOMAJORMECHANICALOROPERATIONALPROBLEMSWEREOBSERVEDDURINGELDOPERATIONS2001SILSOERESEARCHINSTITUTE1INTRODUCTIONIN1987,THERSTTHAIMADERICECOMBINEHARVESTERWASDEVELOPEDBYADOPTINGSOMEOFTHEDESIGNPRINCIPLESFROMCOMBINEHARVESTERMODELSOFWESTERNCOUNTRIES,MODIFYINGSOMEPARTSTOBETTERSUITLOCALCONDITIONSANDINCORPORATINGTHEINTERNATIONALRICERESEARCHINSTITUTEIRRIDESIGNEDAXIALOWTHRESHER,WHICHISCOMMONLYUSEDINTHAILANDASASTATIONARYTHRESHERIN1989,THETHAIMADERICECOMBINEHARVESTERS,BECAMEACCEPTABLEEORTSHAVEBEENMADETOIMPROVETHEDURABILITYANDELDCAPACITY,ANDREDUCEHARVESTINGLOSSESOFTHEMACHINEBYREPLACINGTHEDIRECTDRIVESYSTEMWITHAHYDROSTATICDRIVESYSTEMANDTHEWOODENSHOETRACKSBYMETALTRACKSIN1998,THEREWEREEIGHTRICECOMBINEHARVESTERMANUFACTURERSINTHAILANDTOGETHERPRODUCINGABOUT400UNITSANNUALLYANDSELLINGTHEMATUS40,000PERUNITITWASESTIMATEDTHATABOUT3000LOCALLYMADERICECOMBINEHARVESTERSWEREBEINGUSEDDURING1998ASGIVENINTABLE1IN1999,THEAVERAGEELDCAPACITYOFTHEADOPTIONOFASTRIPPERHEADERFORARKALSIRISILP;AGRICULTURALAQUATICSYSTEMSANDENGINEERINGPROGRAM,SCHOOLOFENVIRONMENT,BANGKOK,THAILAND;EMAILOFCORRESPONDINGTOFARMERSANDCOMMERCIALPRODUCTIONWASSTARTEDIN1993,PERFORMANCEEVALUATIONOFTHETHAIMADERICECOMBINEHARVESTERS,POWEREDBYA108KWENGINEANDCONSISTINGOFA3MWIDECUTTERBAR,SHOWEDTHATTHEELDCAPACITYOFTHEMACHINEVARIEDFROM010TO071HAH1,WITHANAVERAGEOF040HAH1THETOTALGRAINLOSSESVARIEDFROM130TO108OFGRAINYIELD,WITHANAVERAGEOF48THEMAJORPROBLEMSWEREFOUNDINTHEUNDERCARRIAGEUNITOFTHEMACHINE,PARTICULARLYINTHESPROCKETANDCHAINTRANSMISSIONPARTSKALSIRISILPSINGH,1999THAIMADERICECOMBINEHARVESTERGSINGHRESOURCESANDDEVELOPMENT,ASIANINSTITUTEOFTECHNOLOGY,AUTHORSINGHGAITACTH108KW,3MCUTTERBARHARVESTERWASFOUNDTOBE052HAH1WITHATOTALHARVESTINGLOSSOF3OFGRAINYIELDKALSIRISILP,2000POWERREQUIREMENTEVALUATIONSONTHAIMADERICECOMBINEHARVESTERREVEALEDTHATTHEPOWERCONSUMEDBYTHETHRESHINGUNITWASAPPROXIMATELY52OFTHETOTALOPERATINGPOWERDURINGELDOPERATIONSATTHEFEEDRATEOFABOUT100KGMIN1KALSIRISILP,2000THETHRESHINGDRUMWASFREQUENTLYBLOCKED,PARTICULARLYINTHELODGEDCROPCONDITIONINORDERTOOVERCOMETHISPROBLEM,THAITABLE1NUMBEROFTHAIMADERICECOMBINEHARVESTERSINUSEYEARCOMBINEHARVESTER,UNIT19952800199628001997280019983000SOURCEKRISHNASRENIANDTHONGSAWATWONG1998MANUFACTURERSATTEMPTEDTOUSEENGINEPOWERASHIGHASPOSSIBLETOIMPROVEMACHINEPERFORMANCEWITHOUTINCREASINGTHECOSTSIGNICANTLYSTRIPPERHARVESTINGINVOLVESSTRIPPINGTHEGRAINFROMTHECROPWITHOUTHARVESTINGTHESTRAWINRICEHARVESTING,THISMETHODISADVANTAGEOUSASTHEAMOUNTOFSTRAWTOBEHANDLEDBYTHEMACHINECANBEREDUCEDSIGNICANTLYCONSEQUENTLY,THEELDCAPACITYCANBEINCREASEDANDTHEPOWERREQUIREMENTREDUCEDTADOETAL,1998KLINNERETAL1987REPORTEDTHATTHEPOWERCONSUMPTIONOFASTRIPPINGHEADERFORACONVENTIONALCOMBINEHARVESTERVARIEDBETWEEN07AND08KWM1ATNOLOADCONDITIONANDFORWORKINGCONDITIONSTHESAMEWASBETWEEN20AND29KWM1INBARLEYATAFORWARDSPEEDOF4KMH1ANDBETWEEN28AND39KWM1AT60KMH1FORWHEATTHEPOWERREQUIREMENTOFTHESTRIPPINGHEADERINSTANDINGRICEVARIEDFROM10TO45KWM1OFHARVESTINGWIDTHWITHAFORWARDSPEEDOF75KMH1METIANUETAL,1991ASELFPROPELLEDSTRIPPERCOMBINEHARVESTERMOUNTEDONATRACKCHASSISWASDEVELOPEDATNORTHEASTAGRICULTURALUNIVERSITYINCHINATHESTRIPPERHARVESTERWASCOMPOSEDOFADRUMTYPETHRESHERFORTHRESHINGTHESTANDINGRICE,APNEUMATICCONVEYORSYSTEMFORPROVIDINGAIRSUCTIONTOREDUCEHARVESTLOSSES,ANDAPICKUPSYSTEMFORHARVESTINGTHELODGEDCROPJIANGETAL,1992ATRANSVERSEROTORWASUSEDINTHEDESIGNOFTHESILSOERESEARCHINSTITUTESRISTRIPPERHEADERINWHICHSTRIPPINGOFTHEGRAINTAKESPLACEALONGTHELENGTHOFTHEROTORARRANGEDTRANSVERSELYTOTHEDIRECTIONOFTRAVELTADOETAL,1998THEOUTERDIAMETEROFTHEROTORWAS450MMTHESTRIPPERROTORWASTTEDWITHEIGHTROWSOFEXIBLETEETHTHESTRIPPINGELEMENTSWEREMADEOFMOULDEDPOLYURETHANETHATWASESSENTIALLYV’SHAPEDBUTWITHA20MMDIAMETERCIRCULARRECESSATTHEBASETHERSTSTRIPPERSYSTEMWASEVALUATEDINTHEELDINTHEFORMOFA36MWIDEHEADERFORATTACHMENTTOACONVENTIONALCOMBINEHARVESTERMETIANUETAL,1991IN1989,ACOLLABORATIVEPROJECTFUNDEDBYTHEOVERSEASDEVELOPMENTADMINISTRATIONINTHEUKWASSETUPBETWEENTHEINTERNATIONALRICERESEARCHINSTITUTEIRRIANDSRIINORDERTOEVALUATETHEFEASIBILITYOFTHESTRIPPINGROTORASTHEBASISOFPEDESTRIANCONTROLLEDHARVESTINGMACHINESUITABLEFORTHESMALLRICEFARMSOFASIATHEINTERNATIONALRICERESEARCHINSTITUTE,INCOLLABORATIONWITHSRIDEVELOPEDASTRIPPERSYSTEMTHESTRIPPERGATHERERSG800WASBUILTANDELDTESTEDDURINGTHE1992DRYSEASONINTHEPHILIPPINESTHISMACHINEHADAHARVESTINGWIDTHOF800MMANDWASPROPELLEDBYA67KWGASOLINEENGINEWHICHALSODROVETHESTRIPPINGROTORGATHERINGLOSSESWERELESSTHAN1OFYIELDINSTANDINGSEMIDWARFRICEVARIETIESDOUTHWAITEETAL,1992VECHASIT1995FOUNDTHATTHEUNSTRIPPEDLOSSOFTHESG800WASLESSTHAN1INTHAILANDRICECONDITIONSALIGHTWEIGHTSTRIPPERMODELLS600WASDEVELOPEDBYTHEPHILIPPINERICERESEARCHINSTITUTEPHILRICEIN1997TOSUITTHELOCALELDCONDITIONSTHETOTALWEIGHTWAS190KGCOMPAREDTO250KGOFTHESG800DESIGNTHEHARVESTINGWIDTHWAS600MMANDITWASPOWEREDBYA45}6KWGASOLINEENGINETHEELDCAPACITYWAS07HADAY1WITHSHATTERINGLOSSESOFABOUT2ALDASBAUTISTA,1998TRIMO1996EVALUATEDTHEPERFORMANCEOFANINDONESIANMADERICESTRIPPERHARVESTERTHEMACHINEWASPOWEREDBYA63KWDIESELENGINETHEAVERAGEELDCAPACITYWAS008HAH1WITHAHARVESTINGLOSSOFABOUT21THESHELBOURNEREYNOLDSSTRIPPERHEADERWASINVESTIGATEDTODETERMINEITSPOTENTIALUSEFORGRAINHARVESTINGINMANYCOUNTRIESWITHDIERENTCONDITIONSINITALY,RESEARCHATMILANSHOWEDTHATTHEMINIMUMHEADERLOSSINRICEHARVESTINGWAS04OFTHEYIELDFORRINGOANDEUROPAVARIETIESFORPANDAVARIETY,THELOWESTLOSSWAS13OFTHEYIELDPANDAVARIETYSEEMEDTOBESENSITIVETOTHEHEADERSETTINGRESULTINGINHIGHERHEADERLOSSESHOBSONMETIANU,1989THESTRIPPERHEADERTTEDONATHAIMADERICECOMBINEHARVESTERHADNOTBEENSTUDIEDYETTHISSTUDY,THEREFORE,WASINTENDEDTOINVESTIGATEITSPERFORMANCEINELDCONDITIONSANDTHERESULTSAREPRESENTEDINTHISPAPER2DESIGNANDDEVELOPMENTOFSTRIPPERHEADERTHELOCALLYMADERICECOMBINEHARVESTERMANUFACTUREDBYKASETPATANAMANUFACTURINGCOMPANY,PHITSANULOKPROVINCE,NORTHERNTHAILAND,WASSELECTEDFORTHISSTUDY,ASITWASFOUNDTOBETHEMOSTPOPULARMODELINTHECOUNTRYTHISCOMBINEHARVESTERISASELFPROPELLEDMACHINEEQUIPPEDWITHACUTTERBARMECHANISMHAVINGACUTTINGWIDTHOF3MANDA108KWDIESELENGINEASTHEPRIMEMOVERFIG1POWERWASTRANSMITTEDBYVBELTSFROMTHEENGINESHAFTTOOTHERCOMPONENTSOFTHEMACHINE,EXCEPTFORTRACTIONANDHEADERHEIGHTCONTROLWHICHUSEDAHYDROSTATICPOWERTRANSMISSIONSYSTEMTHEPOWERFROMTHETRACTIONSHAFTWASFURTHEREXTENDEDTOTWOINDEPENDENTHYDRAULICPUMPSGEARTYPEVIADOUBLECHAINCOUPLINGSTWOLOWSPEED,HIGHTORQUE,RADIALPISTONMOTORSWERESELECTEDTODRIVETHESPROCKETWHEELOFFIG1THAIMADERICECOMBINEHARVESTEREQUIPPEDWITHCUTTERBARMECHANISMTHEMACHINETHEWORKINGSPEEDOFTHEMACHINEWASVARIEDFROM3TO6KMH1DEPENDINGONTHECROPANDELDCONDITIONSANAXIALOWTHRESHERWASUSEDASATHRESHINGUNITANDTHEMECHANISMCONSISTEDOFAPEGTOOTHCYLINDERWHICHROTATEDINSIDEACONCAVEDOUBLESECTIONTHELOCALLYMADERICECOMBINEHARVESTEREQUIPPEDWITHACUTTERBARCUTALMOSTTHEWHOLERICEPLANTWHEREASTHESTRIPPERHEADERSTRIPPEDONLYGRAINS,LEAVINGMOSTOFTHESTRAWINTHEELDMODICATIONSOFTHERICECOMBINEHARVESTERFORTTINGASTRIPPERHEADERWERECARRIEDOUTBYREMOVINGTHEPICKUPREELANDCUTTERBARUNITSOFTHEMACHINETHREERUBBERPADDLES5CMBY50CMWEREFABRICATEDANDATTACHEDTOTHECENTREOFTHEFRONTAUGERWHICHENABLEDITTOCONVEYSTRIPPEDMATERIALEASILYFROMBOTHSIDESOFTHETABLEAUGERTHROUGHTHECENTREOFTHEFEEDERCONVEYORTHEFEEDERCONVEYORWASATTACHEDWITHRECTANGULARRUBBERPIECESTABLESPECI5CATIONSOFTHETHAIMADECOMBINESTRIPPINGWIDTH,MM3000STRIPPINGROTORDIAMETER,MM540NUMBEROFSTRIPPERROWS8NUMBEROFTEETHPERROW71TRANSMISSIONSYSTEMHYDRAULICRANGEOFSPEED,MIN1600}NOSEADJUSTMENT,MM200POWERSOURCE,KW108NUMBEROFOPERATORS2NUMBEROFUNSKILLEDLABOURERS3FORWARDSPEED,KMH13}75CMBY35CMALONGTHECHAINCONVEYORINORDERTOCONVEYTHESTRIPPEDMATERIALINTOTHETHRESHINGUNITTHEPOWERFROMTHEENGINEWASTRANSMITTEDTOTHESTRIPPINGROTORTHROUGHACOMBINATIONOFPULLEYSANDVBELTSFIG2ORTHROUGHACOMBINATIONOFHYDRAULICANDMECHANICALTRANSMISSIONSYSTEMFIG2MECHANICALTRANSMISSIONSYSTEMOFTHESTRIPPINGROTOR21„HEPROTOTYPESTRIPPERHEADERASTRIPPERHEADERWASFABRICATEDANDMOUNTEDONATHAIMADERICECOMBINEHARVESTERANDTHEPERFORMANCEOFTHEHEADERWASEVALUATEDTHESTRIPPERHEADERMAINLYCONSISTEDOFTHESTRIPPINGROTOR,BAE,HOOD,NOSE,FRONTAUGERANDTHEHYDRAULICMOTORANDPUMPWHICHWEREUSEDTODRIVETHESTRIPPINGROTORDESIGNPARAMETERSOFTHESTRIPPINGROTORWEREBASEDONTHESTRIPPERROTORSYSTEMDEVELOPEDINTHEUKBYSILSOERESEARCHINSTITUTEASUMMARYOFTHESPECICATIONSOFTHESTRIPPERHEADERISPRESENTEDINTABLE2ANDITSMAINCOMPONENTSAREEXPLAINEDBELOWTHEOUTERDIAMETEROFTHESTRIPPERROTORWAS450MMALONGTHEDIRECTIONOFROTORAXIS,ASTRIPPERROTORWASINSTALLEDWITHEIGHTROWSOFTEETH,EACHROWCONSISTINGOF71TEETHTHEROTATIONOFTHESTRIPPINGROTORWASINTHEREVERSEDIRECTIONINRELATIONTOTHEGROUNDWHEELROTATION2HARVESTERWITHSTRIPPERHEADER800RECONDITIONEDISUZUDIESELENGINEFIG3THESTRIPPINGROTORSPEEDWASBETWEEN600AND800MIN1RESULTINGINAPERIPHERALSPEEDOF17}227MS1THEYWEREESSENTIALLYV’SHAPEDBUTWITHA20MMCIRCULARRECESSATTHEBASEFIG4THEHEIGHTOFTHESTRIPPINGROTORCOULDBEADJUSTEDFROMTHEOPERATOR’SSEATUSINGHYDRAULICMEANSFIG3SCHEMATICDIAGRAMOFTHESTRIPPINGROTORTHEPROTOTYPESTRIPPERHEADERWASTTEDWITHLOCALINDUSTRIALRUBBERTEETHTHISWASBECAUSETHEIMPORTEDPOLYURETHANEWASEXPENSIVEANDDICULTTOOBTAINLOCALLYTHECOSTOFLOCALRUBBERTEETHWASUS125FORASETWHEREASASETOFPOLYURETHANESTRIPPERELEMENTSFORTHESTRIPPERHARVESTERCOSTABOUTUS1000ANDNEEDEDTOBEIMPORTEDFROMTHEUKTHEPERFORMANCEOFTHELOCALRUBBERTEETHWASFOUNDTOBESATISFACTORYDURINGELDTESTINGINSTANDINGAND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