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葫芦科植物嫁接机平台、苗木输送系统的设计及总装图毕业论文.doc

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葫芦科植物嫁接机平台、苗木输送系统的设计及总装图毕业论文.doc

摘要I摘要目前在蔬菜种植中,由于营养钵育苗在移栽时对幼苗无损伤,所以有取代传统穴盘育苗的趋势。为了满足营养钵育苗日益普遍的现状,研制新型嫁接机成为现在的一个热门课题。本次设计的自动嫁接机针对的是采用营养钵育苗的葫芦科植物,实现了砧木苗在营养钵内无需拔苗即可直接的操作,有助于嫁接以后苗的恢复,在生产中具有较高的使用价值。本次毕业设计是葫芦科植物自动嫁接机的苗木传输系统及平台。通过分析原有各种嫁接机,我们决定选取传感器配合带式运输机作为苗木传输系统。首先对嫁接机及其苗木传输系统和胶带输送机作了简单的概述接着分析了带式输送机的选型原则及计算方法然后根据这些设计准则与计算选型方法按照给定参数要求进行选型设计接着对所选择的输送机各主要零部件进行了校核。普通型带式输送机由六个主要部件组成传动装置,机尾和导回装置,中部机架,拉紧装置以及胶带。简单的说明了输送机的安装与维护。最后说明了传感器的选择,平台的设计。关键词嫁接机苗木传输系统平台带式输送机选型设计主要部件摘要IIAbstractBecausethebowlseedinghasnoharmtothestockwhentransplanted,thereforeitisusedwidelyandtendstoreplacetheholeseeding.Inordertoapplytothecurrentincreasingnumbersfornutritionalbowlseedingofvegetables,thedevelopmentofnewGraftingautomaticmachinenowbecomeahottopic.TheGraftingautomaticmachineisthecucurbitaceousvegetableswhichseedlinginnutritionalbowl..Itsolvesadifficultprobleminvegetablesgrafting.,therefore,hashighvalueforuseinvegetableproduction.Thegraduationprojectisthetransmissionsystemofgraftingautomaticmachineandplatformdesign.Afteralloftheoriginalgraftmachine,wedecidedtoselectthesensorwithabeltconveyorasseedlingstransmissionsystem.Atfirst,itisintroductionaboutthegraftingautomaticmachine,seedlingstransmissionsystemandthebeltconveyor.Afterthatthebeltconveyorabaseontheprincipleisdesigned.Then,itischeckingcomputationsaboutmaincomponentparts.TheordinarybeltconveyorconsistsofsixmainpartsDriveUnit,JiborDeliveryEnd,TailEnderReturnEnd,IntermediateStructure,LoopTakeUpandBelt.Atlast,itisexplanationaboutfixandsafeguardofthebeltconveyor.KeywordGraftingautomaticmachine,seedlingstransmissionsystem,beltconveyorLectotypeDesign,mainparts目录III目录摘要.................................................................................................................................IAbstract............................................................................................................................II目录..............................................................................................................................III第一章引言....................................................................................................................11.1课题目的意义............................................................................................................11.2葫芦科嫁接机的发展现状...........................................................................................11.3苗木传输系统的研究现状...........................................................................................31.4带式输送机的概述.....................................................................................................31.4.1带式输送机的应用............................................................................................31.4.2带式输送机的分类............................................................................................41.4.3各式输送机的特点............................................................................................41.4.4带式运输机的发展现状.....................................................................................51.4.5带式运输机的工作原理.....................................................................................61.4.6带式运输机的机构和布置形式..........................................................................81.5传感器简介...............................................................................................................10第二章带式输送机设计................................................................................................112.1带式输送机的设计计算..............................................................................................112.1.1已知原始数据及工作条件................................................................................112.1.2计算步骤.........................................................................................................122.1.2.1带宽的确定...........................................................................................122.1.2.2输送带宽度的核算..................................................................................152.1.3圆周驱动力.....................................................................................................152.1.3.1计算公式...............................................................................................152.1.3.2主要阻力计算........................................................................................162.1.3.3主要特种阻力计算.................................................................................182.1.3.4附加特种阻力计算.................................................................................182.1.3.5倾斜阻力计算........................................................................................182.1.4传动功率计算..................................................................................................182.1.4.1传动轴功率(AP)计算.........................................................................182.1.4.2电动机功率计算....................................................................................192.1.5输送带张力计算..............................................................................................20目录IV2.1.5.1输送带不打滑条件校核..........................................................................202.1.5.2输送带下垂度校核.................................................................................212.1.6传动滚筒最大扭矩计算....................................................................................222.1.7拉紧力计算.....................................................................................................232.1.8绳芯输送带强度校核计算.................................................................................232.2驱动装置的选用与设计.............................................................................................232.2.1电机的选用.....................................................................................................242.2.2联轴器............................................................................................................252.3带式输送机部件的选用.............................................................................................262.3.1输送带............................................................................................................262.3.2传动滚筒.........................................................................................................262.3.3托辊................................................................................................................272.3.4制动装置.........................................................................................................282.3.5拉紧装置.........................................................................................................282.4其他部件的选用.........................................................................................................292.4.1机架与中间架..................................................................................................292.4.2电气及安全保护装置.......................................................................................31第三章传感器的选择.....................................................................................................333.1传感器的概述...........................................................................................................333.1.1定义................................................................................................................333.1.2分类................................................................................................................333.2传感器的选择...........................................................................................................343.2.1传感器的类型..................................................................................................343.2.2传感器水平间距..............................................................................................343.2.3传感器垂直间距..............................................................................................343.2.4传感器电源.....................................................................................................34第四章平台设计............................................................................................................354.1材料选取...................................................................................................................354.2结构示意图...............................................................................................................354.3联接方式..................................................................................................................35第五章结论和建议.........................................................................................................365.1结论..........................................................................................................................365.2建议.........................................................................................................................36

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