5XZ-3.0型重力式清選機(jī)下體設(shè)計(jì)畢業(yè)論文.doc

I摘要隨著農(nóng)業(yè)機(jī)械化的發(fā)展，農(nóng)作物種子清選機(jī)械也日趨成熟，其中正壓式重力清選機(jī)發(fā)展最快最成熟。通過查閱大量文獻(xiàn)資料和現(xiàn)場(chǎng)實(shí)習(xí)，設(shè)計(jì)出5XZ-3.0型正壓式重力清選機(jī)，其生產(chǎn)率為3.0t/h。該機(jī)通過雙向傾斜且往復(fù)振動(dòng)的工作臺(tái)和穿過工作臺(tái)面由下而上的氣流進(jìn)行清選作業(yè)，適用于經(jīng)過風(fēng)篩式清選機(jī)、窩眼滾筒清選機(jī)等機(jī)具清選過的外形、尺寸較相似的種子分選。該機(jī)具利用比重不同分離出發(fā)育不好、成熟不完全、受蟲害霉?fàn)€和已發(fā)芽的種子，以及與種子尺寸相近而質(zhì)量有一定差異的夾雜物。關(guān)鍵詞正壓式重力清選機(jī)雙向傾斜往復(fù)振動(dòng)IIAbstractWiththedevelopmentofagriculturalmechanization,thecropsseedcleanerweaponisalsogettingmoreandmoreprogressive,thepositivepressuretypegravitycleanerdevelopmentismostcommon.Throughtheconsultmassiveliteraturematerialandtheworkshoppractice,designsthe5XZ-3.0positivepressuretypegravitycleaner,itsproductivityis3.0t/h.Thisequipmenttorealizechoosesthefunctionclear,throughcaninclineandvibratetheworktableandpassesthroughworkflooraircurrentfrombottomtotoptocomplete,itissuitableforthecontourwhichthesizesimilarseedseparationpassesthroughprimaryelectsclear.Theequipmentusedtoseparatedifferentproportionsofpoor,immature,andhasbeensubjecttopestsorgerminationofseeds,andseedwithsimilarsizeandqualityofacertaindifferenceofimpurities.KeywordPositivepressuretypeGravitycleanerTwodirectionanglesmayadjustReciprocatingvibrationIII目錄摘要.IAbstract.II第1章緒論.11.1國(guó)內(nèi)外發(fā)展情況.11.2結(jié)構(gòu)特點(diǎn)與分類.31.2.1結(jié)構(gòu)特點(diǎn).31.2.2分類.31.3工作原理.41.3.1重力分選原理.41.3.2物料的分層化過程.51.4應(yīng)用范圍.8第二章無級(jí)變速部分的設(shè)計(jì)方案及選擇.9第三章設(shè)計(jì)計(jì)算.103.1總體參數(shù)及運(yùn)動(dòng)參數(shù)的選擇.103.1.1振動(dòng)臺(tái)振動(dòng)頻率的確定.103.2所需風(fēng)量與風(fēng)壓的計(jì)算.133.2.1風(fēng)量的計(jì)算.133.2.2風(fēng)壓的計(jì)算.133.3風(fēng)機(jī)的設(shè)計(jì).173.3.1葉輪的設(shè)計(jì).173.3.2蝸殼的設(shè)計(jì).193.4傳動(dòng)設(shè)計(jì).233.4.1無級(jí)變速器設(shè)計(jì).233.4.2軸承壽命校核.253.5所需動(dòng)力功率確定.263.5.1振動(dòng)臺(tái)功率確定.263.5.2風(fēng)機(jī)所需功率的確定.273.5.3所需理論功率和實(shí)際功率.27IV3.6強(qiáng)度與剛度的設(shè)計(jì)與校核.283.6.1驅(qū)動(dòng)連桿的強(qiáng)度與剛度校核.283.6.2壓桿穩(wěn)定校核.313.6.3無級(jí)變速軸的強(qiáng)度與剛度校核.323.6.4無級(jí)變速器壓縮彈簧的計(jì)算.35第四章機(jī)器的調(diào)節(jié)、操作與維護(hù).404.1調(diào)節(jié).404.2操作.444.2.1初步調(diào)整.444.2.2分選開始后的調(diào)整.4