高剪切式單螺桿擠壓機(jī)設(shè)計說明書[帶圖紙].doc

編號無錫太湖學(xué)院畢業(yè)設(shè)計（論文）題目：高剪切式單螺桿擠壓機(jī)設(shè)計信機(jī)系機(jī)械工程及自動化專業(yè)學(xué)號：學(xué)生姓名：指導(dǎo)教師：（職稱：副教授）2013年5月25日無錫太湖學(xué)院本科畢業(yè)設(shè)計（論文）誠信承諾書本人鄭重聲明：所呈交的畢業(yè)設(shè)計（論文）高剪切式單螺桿擠壓機(jī)設(shè)計是本人在導(dǎo)師的指導(dǎo)下獨立進(jìn)行研究所取得的成果，其內(nèi)容除了在畢業(yè)設(shè)計（論文）中特別加以標(biāo)注引用，表示致謝的內(nèi)容外，本畢業(yè)設(shè)計（論文）不包含任何其他個人、集體已發(fā)表或撰寫的成果作品。班級：機(jī)械94學(xué)號：0923202作者姓名：2013年5月25日II摘要目前膨化食品越來越受到人們的歡迎，而擠壓技術(shù)在膨化食品中的應(yīng)用也更加廣泛。在擠壓機(jī)內(nèi)的面團(tuán)類食品中的水分由于處于壓力之下成液態(tài)，然后從模板孔擠出時，過熱的水分突然處于常壓下，壓力突然降低，水分蒸發(fā)成水蒸汽，產(chǎn)生伸張的和膨脹，這樣使這種產(chǎn)品產(chǎn)生一種低密度輕質(zhì)的狀態(tài)。擠壓技術(shù)作為食品工業(yè)中一項非常重要的技術(shù)得到更大的發(fā)展，現(xiàn)代食品工業(yè)用的螺桿擠壓機(jī)集混合、融合、蒸煮、改性反映、調(diào)質(zhì)、組織化、成型、膨化等多種功能于一身，體現(xiàn)出有利于自動控制、便于靈活轉(zhuǎn)產(chǎn)以及節(jié)能、節(jié)勞力、節(jié)省生產(chǎn)場地等優(yōu)點。單螺桿擠壓機(jī)的結(jié)構(gòu)簡單、易于加工制造、成本低廉，廣泛用于加工各種膨化小吃食品，本設(shè)計中設(shè)計一臺單螺桿擠壓機(jī)，其特點是高轉(zhuǎn)速，高剪切率，外部無加熱和冷卻裝置，而是利用其高剪切率產(chǎn)生的摩擦熱來加熱熔融原料使食品原料得到蒸煮熟化，從而生產(chǎn)出松脆可口的膨化谷物食品。設(shè)計將從擠壓機(jī)的傳動系統(tǒng)，擠壓系統(tǒng)，喂料系統(tǒng)等進(jìn)行完整的設(shè)計。關(guān)鍵詞：膨化食品；擠壓技術(shù)；單螺桿擠壓機(jī)IVAbstractAtpresentpuffsfoodmoreandmoretoreceivepeople'swelcome.Theextrusiontechnologyinpuffsinfoodtheapplicationtobealsomorewidespread.Inextruderpastaclassfoodmoisturecontentbecauseisinunderthepressuretobecometheliquidstate,Thenwhensqueezesoutfromthetemplatehole,thesuperheatmoisturecontentsuddenlyisinundertheatmosphericpressure,thepressurereducessuddenly,Thepressurereducessuddenly,themoistureevaporationsteam,producespromotesandtheinflation,likethiscausesthisproducttohaveonekindoflowdensitylightqualitycondition.Theextrusiontechnologytookinthefoodindustryanextremelyimportanttechnologyobtainsabiggerdevelopment,Modernfoodindustrialusedscrewrodextruderhavethemix,thefusion,thesteamboiling,themodificationreflected,thequenchingandtempering,theorganization,theformation,puffandsoonmanykindsoffunctions,manifestsisadvantageoustotheautomaticcontrol,isadvantageousforproducesadifferentproductnimblyaswellastheenergyconservation,thefestivallaborforce,savesproducesmeritsandsoonlocation.Thesinglescrewextruderstructuresimple,easytoprocessthemanufacture,thecostisinexpensive,widelyusesinprocessingeachkindtopuffsnackfood,Inthedesigndesignsasinglescrewrodextruder,itscharacteristicisthehighspeed,highcuttingrate,theoutsidedoesnothavetheheatingandthecoolingsystem,butisusesthefrictionheatwhichitshighcuttingrateproducestoheatupthefusingrawmaterialenablefoodrawmaterialtoobtainthesteamboilingcuring,thusproducesthepinecrisplydelicioustopuffgrainfood.Thedesignfromtheextrudertransmissionsystem,theextrusionsystem,willfeedthematerialsystemandsoontocarryontheintegritythedesign.Keyword:euffsfoodextrusiontechnologysinglescrewextruderV目錄摘要.....................................................................IIAbstract....................................................................IV目錄......................................................................V1緒論......................................................................11.1擠壓技術(shù)介紹..........................................................11.1.1擠壓技術(shù)在食品生產(chǎn)中的應(yīng)用.........................................11.1.2擠壓技術(shù)在食品生產(chǎn)中的發(fā)展?fàn)顩r.....................................11.1.3擠壓機(jī)生產(chǎn)膨化食品................................................11.1.4擠壓膨化原理.......................................................21.2意義、目的、研究范圍..................................................21.3本課題在國內(nèi)外的發(fā)展概況及存在的問題......................................................................21.4本課題研究內(nèi)容........................................................52單螺桿擠壓機(jī)整體設(shè)計方案..................................................62.1擠壓機(jī)的主要部件.......................................................62.1.1擠壓機(jī)的供料部件...................................................62.1.2螺桿...............................................................62.1.3機(jī)筒...............................................................62.1.4模頭及模板.........................................................62.1.5其他...............................................................72.2擠壓機(jī)的驅(qū)動裝置.......................................................72.2.1電動機(jī)的選用.......................................................72.2.2傳動比分配.........................................................83擠壓機(jī)零部件設(shè)計與計算....................................................93.1螺桿的設(shè)計............................................................93.1.1螺桿的結(jié)構(gòu).........................................................93.1.2螺桿各部分參數(shù).....................................................93.2機(jī)筒結(jié)構(gòu)設(shè)計.........................................................123.3帶輪結(jié)構(gòu)設(shè)計與計算...................................................124螺桿和機(jī)筒強(qiáng)度計算及配合要求.............................................164.1螺桿強(qiáng)度計算.........................................................164.1.1螺桿材料選取......................................................164.1.2螺桿校核計算......................................................164.2機(jī)筒強(qiáng)度校核.........................................................185軸承布置與校核計算.......................................................205.1徑向軸承.............................................................205.2推力軸承.............................................................21