S114型碾轮式混砂机的设计说明书.doc

毕业设计说明书1目录1前言········································································································12总体方案论证···························································································23传动方案的论证························································································33.1方案一、带传动·····················································································33.1.1带传动的主要优点··············································································33.1.2带传动的缺点·····················································································33.2方案二、齿轮传动·················································································43.2.1齿轮传动的主要优点···········································································43.2.2齿轮传动的主要缺点···········································································43.3方案三、蜗杆传动·················································································43.3.1蜗杆传动的主要优点···········································································43.3.2蜗杆传动主要缺点··············································································44选用电动机······························································································65机械传动装置的总体设计···········································································75.1传动装置的运动简图··············································································75.2传动装置总传动比·················································································75.3分配各级传动比·····················································································75.4计算传动装置的运动参数和动力参数························································85.4.1各轴转数···························································································85.4.2各轴功率···························································································85.4.3各轴转矩···························································································85.5将运动和动力参数计算结果进行整理并列于下表········································96机械传动件的设计····················································································106.1锥齿轮设计及计算项目··········································································106.1.1按接触疲劳强度设计计算····································································106.1.2有关参数修正····················································································116.1.3弯曲疲劳强度校核计算·······································································116.2高速级直齿圆柱齿轮的设计····································································156.2.1选择齿轮材料····················································································156.2.2按齿面接触疲劳强度计算····································································15S114型碾轮式混砂机的设计（总装及传动机构设计）26.2.3校核齿根弯曲疲劳强度·······································································166.3低速级斜齿圆柱齿轮的设计····································································186.3.1齿轮材料的选择················································································186.3.2确定公式中个参数值··········································································186.3.3设计计算··························································································196.3.4校核齿面接触疲劳强度·······································································196.3.5校核计算··························································································206.3.6计算齿轮传动几何尺寸·······································································206.3.7齿轮结构设计及绘制齿轮零件图··························································217轴的设计································································································238主要规格及技术参数················································································249主要结构及工作原理·················································································259.1机体····································································································259.1.1机盘································································································259.1.2出砂门·····························································································259.2传动机构·····························································································259.2.1电动机·····························································································259.2.2减速器·····························································································259.3辗轮机构·····························································································259.3.1混辗机构··························································································259.3.2辗轮································································································259.3.3刮砂板·····························································································2610操作与使用····························································································2711结论·····································································································28参考资料····································································································29致谢····································································································30毕业设计说明书3S114型碾轮式混砂机的设计(总装及传动机构设计)摘要：课题来源于大丰市春城铸造机械厂。设计主要包括混砂机的传动部分，齿轮传动的设计，轴的设计与校核，混砂机总体结构的设计分析与计算。其中S114型碾轮式混砂机减速机采用圆锥+二级渐开线圆柱齿轮软齿面减速方式，不仅满足了混砂机传动装置传动比大和承载能力高的要求，而且使减速机具有结构简单，成本低，易于制造，安装、调整要求低，运行维护方便，可靠性更强等特点。在混砂机设计中，还采取了以下措施，以保证其技术先进性和经济合理性:（1）采用矮刮板，加强对型砂的混合搅拌作用，并降低其功率消耗；（2）加大卸砂门面积，缩短卸砂时间；（3）采用辉绿岩铸石做底盘护板，增加其使用寿命，减少刮板磨损,改堆焊WC（碳化钨）为直接焊接硬质合金刀片,针对强度不足,在刮板反面焊上加强筋以增加其强度,经改进后,一副刮板可正常使用1年左右,刮砂干净,结砂很少,负荷波动小。因此,设计具有较好的应用前景和实用价值。关键词：辗轮式混砂机；传动装置；密封；润滑；减速机S114型碾轮式混砂机的设计（总装及传动机构设计）4TheDesignoftheS114RollerSandMixer(theDesignoftheGeneralFittingandtheDriveGear)Abstract:Thesubjectstemsfromthemachine-castingfactoryofChunchengofDafengCity.Thedesignmainlyincludesthedrivesystemofthesandmixer,thegear,thedesignandcheckoftheaxle,theanalyzingandcalculationofthegeneralfitting.TheS114typesand-mixturemachineusesa2-stagespiralgearboxwhichnotonlysatisfiestomachinetransmissionandtherequirementofbearingcapacity,butalsomakesdecelerationfacilitysimple,economical,contributestomanufacture,makesrequirementofinstallationandadjustmentlow,andmakesreliabilitystrong.Inthemachinedesign,thefollowingmeasureshavebeenadoptedinordertoguaranteetechnologyadvancementandeconomyreliability.WeldedWC(tungstencarbide)isadoptedinsteadofdirectweldingbladeofhardalloyAccordingtostrength.Thescraperreversesidesofweldsareenforcedinordertoincreaseitsstrength.Afterimprovement,apairofscrapermaybeusedforoneyearincommon.Itiscleantoscrapesand,withfewknotsandandlittleloadfluctuation.So,thedesignwillhavebetterprospectofapplicationandpracticalvalue.Keywords：wheelrollingtypesandmixer；transmission；sealingdevice；lubrication；Gearbox