采用剥离器收割台的联合水稻收割机.pdf采用剥离器收割台的联合水稻收割机.pdf

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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,ACOLLABORATIVEPROJECTFUNDEDBYTHEOVERSEASDEVELOPMENTADMINISTRATIONINTHEUKWASSETUPBETWEENTHEINTERNATIONALRICERESEARCHINSTITUTEIRRIANDSRIINORDERTOEVALUATETHEFEASIBILITYOFTHESTRIPPINGROTORASTHEBASISOFPEDESTRIANCONTROLLEDHARVESTINGMACHINESUITABLEFO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