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目录
摘要
abstract
1引言................................................................................................................................................ 1
2玉米脱粒机总体结构....................................................................................................................... 2
2.1入料部分.............................................................................................................................. 2
2.2脱粒部分.............................................................................................................................. 2
2.3筛选部分.............................................................................................................................. 2
2.4机架部分.............................................................................................................................. 2
2.5玉米脱粒机的总体设计......................................................................................................... 2
3 玉米脱粒机的设计.......................................................................................................................... 3
3.1 电动机的选择...................................................................................................................... 3
3.2 钉齿条上的钉齿转速............................................................................................................ 3
3.3 钉齿滚筒的转速................................................................................................................... 3
3.4 电动机的功率...................................................................................................................... 3
3.5 电动机的转速...................................................................................................................... 4
4带及带轮的设计.............................................................................................................................. 5
4.1传动带的设计....................................................................................................................... 5
4.1.1 确定计算功率............................................................................................................. 5
4.1.2 选择V带的型号......................................................................................................... 5
4.1.3确定带轮的基准直径................................................................................................... 5
4.1.4 确定传动中心距和带长............................................................................................... 6
4.1.5 验算主动轮上的包角.................................................................................................. 6
4.1.6 确定V带的根数......................................................................................................... 6
4.1.7 确定带的初拉力......................................................................................................... 7
4.1.8求V带传动作用在轴上的压力..................................................................................... 7
5 V 带带轮的设计............................................................................................................................. 8
5.1带轮的材料选择.................................................................................................................... 8
5.2结构设计.............................................................................................................................. 8
5.3 从动带轮的设计................................................................................................................... 8
6 传动轴的设计............................................................................................................................... 10
6.1根据轴向定位的要求确定轴的各段直径和长度.................................................................... 10
6.2 初步选择输出轴系............................................................................................................. 10
6.3确定输出轴上的圆角半径值.............................................................................................. 11
6.4 按弯扭合成条件校核轴的强度............................................................................................ 11
6.4.1 作轴的简图............................................................................................................... 11
6.4.2 求输出轴上的所受作用力的大小............................................................................... 11
6.4.3钉齿条上的合力......................................................................................................... 11
6.4.4轴上水平面内所受支反力如图.................................................................................... 12
6.4.5轴在垂直面内所受的支反力....................................................................................... 12
6.4.6 作弯矩图.................................................................................................................. 12
6.4.7作弯矩图................................................................................................................... 13
6.4.8作当量弯矩图（弯矩、扭矩合成图）......................................................................... 13
6.5 校核轴的强度.................................................................................................................... 13
7 钉齿条的设计............................................................................................................................... 15
7.1 钉齿条的总体结构设计...................................................................................................... 15
7.2 钉齿条及钉齿的设计.......................................................................................................... 15
7.3 钉齿的设计........................................................................................................................ 16
7.4 圆盘的设计........................................................................................................................ 16
8 栅格式凹板的设计........................................................................................................................ 18
9入料口及脱粒机上盖的设计........................................................................................................... 19
10机架的设计.................................................................................................................................. 20
11轴承座的设计.............................................................................................................................. 21
12玉米脱粒机上的标准件的选择...................................................................................................... 22
12.1玉米脱粒机上的螺栓的选择............................................................................................... 22
12.2钩头楔键的选择................................................................................................................ 22
13玉米脱粒机的安全操作................................................................................................................ 23
13.1超速运转,机械“爆炸”.................................................................................................... 23
13.2禁止过疲劳或酒后操作...................................................................................................... 23
14 玉米脱粒机的维护...................................................................................................................... 24
14.1玉米脱粒机的技术保养...................................................................................................... 24
14.2玉米脱粒机的保管............................................................................................................. 24
结论................................................................................................................................................ 24
致谢................................................................................................................................................ 25
参考文献：...................................................................................................................................... 26
玉米脱粒机的设计
摘要：为了降低农民在玉米脱粒时劳动强度、提高工作效率,设计玉米脱粒机。该机主要有入料口、栅格式凹板和钉齿脱粒滚筒及传动部件等组成。以电动机为动力源，动力由电动机输出轴输出，再通过传动带传递到钉齿脱粒滚筒上，钉齿脱粒滚筒配合栅格式凹板将玉米脱粒，玉米粒从栅格式凹板分离并排出机体外，而玉米芯从入料的另一端排出机体之外。
关键词：玉米；脱粒机；结构；设计
Maize sheller design
Abstract: For reducinga peasant during the period of the maize threshes, the intensity of labour,raises working efficiency , designs maize sheller. Be machine's turn to havemainly enter expect that the mouth , bars form notch board and nail tooth thecylinder threshing and drive component etc. are composed of. Take electricmotor as driving force source, driving force exports axis output from theelectric motor , the nail tooth seed-husking cylinder threshes on the cylinderthreshing again by the fact that belt delivery arrives at the nail tooth,coordinating bars form notch board with the maize, besides niblet complies withbars form notch board separation and the outside discharging airframe, but themaize core discharges airframe from another one end entering material.
Keywords: Maize; Sheller; Structure; Design
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