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5XZ-3.0型重力式清选机下体设计毕业论文.doc

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5XZ-3.0型重力式清选机下体设计毕业论文.doc

I摘要随着农业机械化的发展,农作物种子清选机械也日趋成熟,其中正压式重力清选机发展最快最成熟。通过查阅大量文献资料和现场实习,设计出5XZ3.0型正压式重力清选机,其生产率为3.0t/h。该机通过双向倾斜且往复振动的工作台和穿过工作台面由下而上的气流进行清选作业,适用于经过风筛式清选机、窝眼滚筒清选机等机具清选过的外形、尺寸较相似的种子分选。该机具利用比重不同分离出发育不好、成熟不完全、受虫害霉烂和已发芽的种子,以及与种子尺寸相近而质量有一定差异的夹杂物。关键词正压式重力清选机双向倾斜往复振动IIAbstractWiththedevelopmentofagriculturalmechanization,thecropsseedcleanerweaponisalsogettingmoreandmoreprogressive,thepositivepressuretypegravitycleanerdevelopmentismostcommon.Throughtheconsultmassiveliteraturematerialandtheworkshoppractice,designsthe5XZ3.0positivepressuretypegravitycleaner,itsproductivityis3.0t/h.Thisequipmenttorealizechoosesthefunctionclear,throughcaninclineandvibratetheworktableandpassesthroughworkflooraircurrentfrombottomtotoptocomplete,itissuitableforthecontourwhichthesizesimilarseedseparationpassesthroughprimaryelectsclear.Theequipmentusedtoseparatedifferentproportionsofpoor,immature,andhasbeensubjecttopestsorgerminationofseeds,andseedwithsimilarsizeandqualityofacertaindifferenceofimpurities.KeywordPositivepressuretypeGravitycleanerTwodirectionanglesmayadjustReciprocatingvibrationIII目录摘要....................................................................................................IAbstract..........................................................................................II第1章绪论......................................................................................11.1国内外发展情况...................................................................11.2结构特点与分类...................................................................31.2.1结构特点...................................................................31.2.2分类..........................................................................31.3工作原理..............................................................................41.3.1重力分选原理............................................................41.3.2物料的分层化过程....................................................51.4应用范围.............................................................................8第二章无级变速部分的设计方案及选择.........................................9第三章设计计算............................................................................103.1总体参数及运动参数的选择..............................................103.1.1振动台振动频率的确定...........................................103.2所需风量与风压的计算.....................................................133.2.1风量的计算.............................................................133.2.2风压的计算.............................................................133.3风机的设计........................................................................173.3.1叶轮的设计.............................................................173.3.2蜗壳的设计.............................................................193.4传动设计...........................................................................233.4.1无级变速器设计......................................................233.4.2轴承寿命校核..........................................................253.5所需动力功率确定.............................................................263.5.1振动台功率确定......................................................263.5.2风机所需功率的确定...............................................273.5.3所需理论功率和实际功率.......................................27IV3.6强度与刚度的设计与校核.................................................283.6.1驱动连杆的强度与刚度校核...................................283.6.2压杆稳定校核..........................................................313.6.3无级变速轴的强度与刚度校核................................323.6.4无级变速器压缩弹簧的计算...................................35第四章机器的调节、操作与维护...................................................404.1调节...................................................................................404.2操作...................................................................................444.2.1初步调整.................................................................444.2.2分选开始后的调整..................................................484.2.3提高分选能力...........................................................494.3维护...................................................................................504.3.1工作台......................................................................504.3.2皮带.........................................................................514.3.3轴承.........................................................................51结论.................................................................................................52致谢.................................................................................................53参考文献.........................................................................................54附录1..............................................................................................56附录2..............................................................................................60

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