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1、毕业设计（论文）外文参考资料及译文译文题目：Investigationofthemaizeearthreshingprocess玉米月兑粒过程的研究学生姓名:学号：专业：机械设计制造及其自动化所在学院：机电工程学院指导教师：职称：InvestigationofthemaizeearthreshingprocessS.PetkevichiusaA,LShpokas,H.-D.KutzbachbWetmaizeearsofthe'Benicia，varietywithamoisturecontento
2、f32.5%andmediumdrymaizeearsof'Attributevarietywithamoisturecontentof18.5%werefedinparallelandperpendiculartothedrumshaftofaconventionalthreshingdrum.Maizeearsfedinparallelwiththedrumshaftintheconcaveclearancemovedtwiceasfast(4-5ms1),receivedtwiceasfew
3、(5-7)raspbarimpacts,and10-20%ofthethreshedgrainpassedthroughtheconcavewhencomparedtothreshingwiththemaizeearsfedperpendiculartothedrumshaft.Threshinglossesofwet'Benicia'maizeearsdidnotexceedthepermissiblerangeofO.5%whendrumraspbarsmovedatthespeedof16m
4、/sandtheconcaveclearancewasinthefront21mmandattheend6mm(21-6mm).Whenmediumdry"Attribut"maizeearswerethreshed,theconcaveclearancewasinthefront27mmandattheend15mm.Whenmaizeearswerefedperpendiculartothedrumshaft,theclearancecouldbeincreasedby2mmasthemaiz
5、eearsmovedthroughtheconcaveatanapproximately1.8m/sslowerspeed,andreceived8additionalraspbarimpacts.Duringthethreshingofwet"Benicia"maizeearsthethreshingdamagewas30%greaterascomparedwiththethreshingdamageofmediumdrymaizeearsof"Attribufvariety.Wetmaizes
6、houldbeimmediatelycmshedandpreservedassilage.1.IntroductionMaizeproductionisincreasinginEuropeasmaizecropsaregrownnotonlyforasilageandgrainbutalsoforbiogasproduction.Since2000,maizevarietieswithshortervegetationperiodshavebeengrowninLithuania.Ingoodwe
7、atherconditionsthegrainsinearsmatureto35%moisturecontentafterwhichtheyareharvestedduringthesecondhalfofOctober(Bulgakovetal.,2006).However,itisnoteconomictodrysuchgrainstoal4%moisturecontent.Thus,anewwetmaizeprocessingtechnologywastested(Shpokas&Petke
8、-vichius,2005).Whenthemaizemoisturereached35%,theearswereharvestedusingthecornhead,maizegrainswereCrushedon-site,andthesilagewaskeptinatrench.However,thethreshingprocessofthewetmaizeearswasnotinvestigatedandtheoptimumparametersforthethreshinga
