机械5

脐橙分级机分级部分 摘要 近年来，随着我国特别是赣南地区脐橙种植业的发展，对脐橙分级精度的要求越来越高。脐橙分级是脐橙采后加工的第一步，分级结果对分级后销售价格及后续加工都有极大的影响。以实现脐橙机械化分级为出发点，以提高分级精度为目标，对影响脐橙分级机的因素进行试验研究，找出影响分级精度的主要因素及影响趋势，研究分级机对脐橙的分级机理，选择较优工作参数，为分级机结构设计进一步完善提供一定的理论依据。脐橙分级是以其外形尺寸为标准，按大小进行分级。对不同品种核桃的纵径、横径和侧径尺寸进行测量，并对测量结果统计分析。在对尺寸分级研究的基础上，最终确定以脐橙侧径方向尺寸为标准进行分级。分级机采用辊轴式分级法，对脐橙进行连续无级分级。本文阐述了它的结构特点和工作原理，分析了脐橙在辊轴上的运动以及运动速度对分级效果的影响，对分级机的主要工作部件进行设计研究，确定相关参数。 关键词：脐橙；变间隙螺距；大小分级；分级精度 Navel Classifier sectio
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n accuracy 目录 摘要1 目录3 第一章绪论4 1.1研究目的和意义4 1.2国内外研究现状4 1.2.1国内外果蔬分级法4 1.2.1.1按重量分级4 1.2.1.2按大小分级5 1.2.1.3光电式分级7 1.2.2国内外果蔬分级机械发展状况8 1.3存在的问题10 1.4主要研究的内容10 第二章脐橙分级机的整体结构设计10 2.1脐橙分级机的技术参数及结构要求10 2.1.1脐橙的物理特性10 2.1.2技术要求11 2.1.3脐橙分级机的结构要求11 2.1.4脐橙分级机的工作原理11 2.2整体设计原则12 2.3脐橙分级机的总体结构设计12 2.3.1机架结构设计12 2.3.1.1电动机的选用13 2.3.1.2减速器的选用14 2.3.1.3传动系统的设计14 第三章主要工作部件的结构设计15 3.1分级辊的设计15 3.2分级部分链条的设计18 3.3主动链轮的设计19 3.4螺旋轨道轴上的链轮设计20 3.5链轮轴的设计21 3.6传动中间轴的设计23 3.6.1传动中间轴的结构设计23 3.7螺旋轨道轴的设计24 3.7.1螺旋轨道轴的结构参数的确定24 3.7.2螺旋轨道轴扭矩及轴向力分析26 3.7.3螺旋轨道轴的转速的确定27 3.9圆锥齿轮的设计29 3.9.1圆锥齿轮的结构参数设计29 参考文献31 总结32 致谢33