2016年玉米脱粒机毕业论文设计doc格式免费下载

目  录

1、绪论…………………..…………………................................…..............................................1

1.1研究内容的现状………..………………………………........................………………..1

1.2选题意义……………………………………………….....................……...…………....1

1.3研究内容…………………...……………...........………………..…................................1

2、玉米脱粒机总体设计方案……………………………......…...............................…...........…2

2.1设计任务分析………………………………....................................................................2

2.1.1总功能确定……………………….............……………........................................3

2.2功能分析…………………………………………….....……………...............................3

2.2.1功能分析………………………………………………….…................................3

3、电动机的选择…………………………….......................………..…...……….………...........4

3.1电动机的转速………………………………………………...........................….............4

3.2确定电机工作效率….....................……………………………….....………….…….....5

3.3确定电机的型号………………….....................……………………...……….….…..…5

4、带轮与传动带的设计............……………….....................……...........……….....…...........…6

4.1带轮材料的选择….....................………………...............……..........………......…..…..6

4.2带轮的结构设计………………........................................…............................................6

4.2.1主动轮的结构设计.................................................................................................6

4.2.2从动带轮的设计.………..…..................................................................................7

4.3传动带的设计………...................................................................………..…….….….....8

5、轴的设计………………………………...................…….……………...……….…...............11

5.1轴材料的选择…………………….....................….…….........……………...................11

5.2轴结构的基本要求………………….....................……………........…….......….….....11

5.3根据轴向定位的要求确定轴的各段直径和长度..............................................…....…12

5.4 初步选择输出轴系........................................................................................................12

5.5确定输出轴上的圆角半径值.......................................................................................13

5.6按弯扭合成条件校核轴的强度......................................................................................13

5.6.1作轴的简图...........................................................................................................13

5.6.2 求输出轴上的所受作用力的大小.....................................................................13

5.6.3钉齿条上的合力...................................................................................................13

5.6.4轴上水平面内所受支反力如图...........................................................................13

5.6.5轴在垂直面内所受的支反力...............................................................................14

5.6.6 作弯矩图.............................................................................................................14

5.6.7作弯矩图..............................................................................................................15

5.6.8作当量弯矩图（弯矩、扭矩合成图）..............................................................15

5.7 校核轴的强度................................................................................................................15

5.8轴承座的设计..................................................................................................................16

6、钉齿滚筒的设计………………...................…….....…………………….....……….............17

6.1钉齿条的总体结构设计……….....................…….........………………….......….…....17

6.2钉齿条及钉齿的设计…………….....................……..........……………..........….........17

6.2.1钉齿的设计.....…………….................................................................................17

6.3 圆盘的设计 ….........………….....................…............................................................18

7、玉米脱粒机的安全操作..........................................................................................................19

7.1超速运转,机械“爆炸”……….....................………....….........……..................……19

7.2禁止过疲劳或酒后操作…………......................................……………........................19

8、玉米脱粒机的维护..................................................................................................................21

8.1玉米脱粒机的技术保养…………..................................................................................21

8.2玉米脱粒机的保管…………………….....................................….................................21

总结：……………………............................................................................................................22

参考文献…………………….......................................................................................................23