摘要
咖啡是当下主流饮品之一，经济价值极高，咖啡豆是制成咖啡的主要原材料，外层包裹着一层硬壳，采用人工脱壳效率低、劳动成本高。文中根据查找有关于咖啡豆脱壳机的文献，对其优缺点进行分析后，确定以三辊式脱壳装置为基础进行改进设计，三辊式脱壳装置主要由两根动辊和一根静辊组成，辊上设置有等距螺纹，动辊与静辊形成转速差，外壳与辊产生摩擦、挤压作用实现脱壳。改进设计内容主要包括：在其原有的基础上增加二次脱壳装置，在原有的静辊上设置调节装置，分离装置采用先风选后网筛的方式，传动系统的设计计算。改进设计主要解决了原有脱壳装置脱壳率不高、不能对体积大小的咖啡豆进行脱壳、分离不彻底等问题。
关键词：咖啡豆；脱壳；风选；网筛
Abstract
Coffee is one of the mainstream drinks at the moment. The economic value is extremely high. Coffee beans are the main raw materials for making coffee. The outer layer is covered with a hard shell, and the use of artificial shelling is inefficient and the labor cost is high. According to the literature on coffee beans husking machine, the paper analyzes the advantages and disadvantages of coffee beans husking machine, and determines that the three-roll husking device is used as the basis for improving the design. The three-roll husking device is mainly composed of two dynamic rolls and one static roller., The roller is equipped with equidistance thread. The rotation speed difference between the dynamic roller and the static roller, the friction between the shell and the roller, and the extrusion effect to achieve shelling. The improved design mainly solves the problems such as the low husking rate of the original husking device, the inability to husk the size of the coffee beans, and the incomplete separation. The main contents of the improved design include: the addition of a secondary dehulling device on the basis of its original, the setting of a adjusting device on the original static roller, the separation device using the method of first wind selection and then screen, and the design and calculation of the transmission system.
Key words: coffee beans; Shelling; Wind selection; Double screening; Sole works
目录
1概述1
1.1课题研究背景1
1.2咖啡豆脱壳机的研究现状1
1.2.1咖啡豆脱壳装置国外研究现状1
1.2.2咖啡豆脱壳装置国内研究现状1
1.2.3分离装置的研究现状4
1.3该课题研究的主要内容4
2咖啡豆脱壳机方案设计5
2.1咖啡豆脱壳装置方案设计5
2.2咖啡豆分离装置方案设计6
3咖啡豆脱壳装置的设计7
3.1动辊的设计7
3.2静辊的设计7
3.2橡胶辊的设计8
3.3导流板的设计9
3.4调节装置的设计10
4分离装置的设计11
4.1风选装置的设计11
4.1.1风机的选择11
4.2网筛装置的设计12
5传动系统的设计14
5.1电机的选择14
5.2带传动设计计算15
5.2.1 V带设计计算15
5.2.2带轮结构设计17
5.3齿轮设计计算18
5.4链传动设计计算19
5.4.1滚子链设计计算19
5.4.2链轮设计20
5.5轴的校核22
6咖啡豆脱壳机的机架设计26
7结论与展望28
7.1结论28
7.2展望29
参考文献31
附录32
装配图
装配图视图
从动轴
动辊
静辊
橡胶辊筒
主动轴
