摘要 本文以黑豆挑选机为研究对象，主要研究内容：在黑豆特性和力学特性研究结果的基础上，确定黑豆选机的总体结构和关键结构参数，开展黑豆挑选机的结构设计，并分析主要零部件的受力情况，得到工作过程中驱动力矩的变化规律和最大驱动功率。 黑豆是世界上广泛栽培的主要油料和经济作物，市场需求巨大，同时也是主要的创汇农产品之一。针对这一问题，本文针对黑豆加工环节中的去杂质工序进行了机械化设计，设计本台黑豆挑选机。本黑豆挑选机采用两种精选方式达到精选目的，黑豆经过挑选机，首选经过风选，将较轻杂质吹出，然后经过筛选，将黑豆较重杂质过滤去。 本文首先分析原始参数，并以此参数设计并选定了电动机，然后对齿轮及轴进行了设计计算，对其它结构进行了详细设计，并绘制出整机装配图及零件图。 本文所设计的黑豆挑选机结构简单，操作方便。 关键词：结构设计齿轮传动轴鼓风机 Abstract O
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n gear shaft blower 目录 摘要I Abstract II 第一章绪论1 1.1课题来源及研究的目的和意义1 1.2黑豆清洗加工简述2 1.2.1初步清理2 1.2.2去石3 1.3黑豆挑选机研究现状及发展趋势3 1.4研究方案和预期达到的目标5 第二章设计任务书7 2.1方案原理设计7 2.1.1原理方案一8 2.1.2原理方案二9 2.1.3原理方案确定10 2.2传动设计11 2.2.1原始参数拟定11 2.2.2电机选择12 2.2.3传动比的分配13 2.2.4齿轮传动设计14 2.2.5齿轮结构设计21 2.2.6齿轮及齿轮副精度的检验项目计算（大齿轮） 25 2.2.7传动轴的设计27 2.3风机的设计计算34 2.3.1风机全压计算34 2.3.2电机及风机的选用35 2.4结构设计35 2.4.1机架设计35 2.4.2振动筛结构设计38 2.4.3风选分离装置40 总结41 参考文献43 致谢45