V带轮设计项目说明指导书.docx

机械设计基础
课程设计说明书

设计题目 V带传动设计
设计组员 李亚霖、吴郅君、刘玲玲、张乐、万学赟
院 系 机电工程学院
专 业 电气工程及其自动化
指导老师 冯原

目录

一． 设计任务书··········································································································3
二、 V带传动设计
1.确定计算功率········································································································3
2.选择V带带型···································································································3
3.确定V带基准直径并验算带速·····································································3
4.确定V带中心距和基准长度····································································4
5.验算小带轮上包角········································································4
6.计算带根数·········································································5
7.计算带对轴作用力··············································································5
三、 V带轮结构设计
1.V带轮材料··························································································5
2.V带轮结构形式·······························································6
3.V带轮槽型··············································································6
4.V带轮尺寸······································································6
四、 小带轮装配图····································································································6
五、 参考文件··············································································································6

一、 设计任务书
1.题目：
设计由电动机驱动鼓风机V带传动。
图1所表示为传动机结构简图，主动带轮1直接装在电动机轴上，从动轮2装在鼓风机轴上，两带轮中心水平距离a约于大带轮直径d22倍。

图1
2.V带传动设计原始数据以下：
作业题号
鼓风机主轴转速n2
电动机型号
额定功率p/kw
满载转速n1
主轴直径D/mm
主轴轴长E/mm
一天工作时间/h
5
650
Y160M-4
11
1460
42
110
16
3.V带传动设计内容
选择V带型号、长度、根数；V带轮直径、包角、带速；V带传动中心距，V带对轴作用力等。
二、V带传动设计
设计计算及说明
1.确定计算功率
由参考文件[1]表6-4查得工作情况系数，
故

2.选择V带带型
依据,,由参考资料[1]表6-8选择B型带。
3.确定带轮基准直径并验算带速
1) 初选小带轮基准直径
由参考资料[1]表6-5和表6-6，取小带轮基准直径。
2) 验算带速v

因为5m/s<v<25m/s,故带速适宜。
3) 计算大带轮基准直径

按表6-6，取。
4）计算大带轮转速n2

误差小于5%，可行。
4.确定V带中心距a和基准长度L
1)初步选择。
2)计算所需基准长度

由参考资料[1]表6-2选带基准长度。
3)计算实际中心距a

5.验算小带轮上包角

小轮包角适合。
6.计算V带根数z

由表6-3
传动比
由表6-7
由表6-2查得
由表6-8查得

取Z=5根。
7.计算带对轴作用力
预紧力
查表

计算带对轴作用力

三、V带轮结构设计
1.V带轮材料
选择HT200
2.V带轮结构形式
因为，所以大带轮选择轮幅式结构，小带轮采取腹板式结构。
3.V带轮尺寸计算

4.V带轮轮槽尺寸

5.主动V带轮结构尺寸

见附图。
四、小带轮装配图
见附图
五、参考文件
参考文件[1]——机械设计基础（第四版） 高等教育出版社
参考文件[2]——机械设课程设计 高等教育出版社