机械5

摘要 目前我国各种选煤厂使用的设备中,振动筛（筛分机）是问题较多、维修量较大的设备之一。这些问题突出表现在筛箱断梁、裂帮、稀油润滑的箱式振动器漏油、齿轮打齿、轴承温升过高、噪声过大等问题,同时伴有传动带跳带、断带等故障。这类问题直接影响了振动筛（筛分机）的使用寿命,严重影响了生产。圆振动筛可以很好的解决此类问题，因此本次设计的振动筛为圆振动筛，该系列振动筛主要用于煤炭行业中物料分级、脱水、脱泥、脱介等作业。其工作可靠，筛分效率高，但设备自身较重。设计分析论述了设计方案，包括振动筛的分类与特点和设计方案的确定；对物料的运动分析；对振动筛的动力学分析及动力学参数的计算；合理设计振动筛的结构尺寸；进行了激振器的偏心块等设计与计算，包括原始的设计参数，电动机的设计与校核；进行了主要零部件的设计与计算，皮带的设计计算与校核，弹簧的设计计算，轴的强度计算，轴承的选择与计算，然后进行了设备维修、安装、润滑及密封的设计，最后进行了振动筛的环保以及经济分析。 关键词：振动筛；激振器；圆振动筛 Rou
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nd shaker 目录 1.绪论1 1.1前言1 1.2背景1 2振动筛筛面物料运动理论5 2.1筛上物料的运动分析5 2.2正向滑动6 2.3反向滑动7 2.4跳动条件的确定8 2.5物料颗粒跳动平均运动速度9 3.振动筛的工作原理及结构组成10 3.1圆振动筛的工作原理10 3.2振动筛基本结构11 4.振动筛动力学基本理论12 5.振动筛参数计算16 5.1运动学参数的确定16 5.2振动筛工艺参数的确定18 5.3动力学参数19 5.4电动机的选择19 6主要零件的设计与计算22 6.1轴承的选择与计算22 6.2轴的设计26 6.3支承弹簧设计验算29 7振动筛的安装维护及润滑32 7.1振动筛的安装及调试32 7.2操作要点33 7.3维护与检修34 7.4振动筛的轴承润滑的改进35 结束语36 参考文献37