目录
1. 前言·····································································1 2. 设计任务书·······························································1 3. 传动方案的分析和拟定（富传动方案简图）····································1 4. 电动机的选择·····························································1 4.1电动机功率计算··························································2 4.2电动机转矩计算··························································2 4.3总传动比计算和分配各级传动比············································2 5. 传动装置运动和动力参数计算···············································3 5.1各轴转速的计算···························································3 5.2各轴功率的计算···························································3 5.3各轴扭矩的计算···························································3 6. 传动零件的设计计算························································4 6.1高速级齿轮传动的设计计算·················································4 6.2低速级齿轮传动的设计计算··················································7 7. 轴的设计计算·····························································8 7.1高速轴最小轴径计算·······················································8 7.2低速轴的设计计算·······················································9 7.2.1低速轴的结构设计·····················································9 7.2.2低速轴弯扭组合强度校核···············································10 7.2.3低速轴疲劳强度安全系数校核············································10 7.3中间轴的设计计算························································10 8. 滚动轴承的选择和计算·····················································10 8.1高速轴和中间轴上滚动轴承的选择··········································10 8.2低速轴上滚动轴承的选择和计算············································10 9. 联轴器的选择·····························································11 9.1输入轴联轴器的选择·······················································11 9.2输出轴联轴器的选择·······················································11 10. 键连接的选择和计算·······················································11 10.1高速轴和中间轴上键联接的选择············································11 10.2低速轴上键联接的选择和计算··············································12 11. 润滑方式、润滑剂牌号及密封装置的选择······································12 11.1润滑方式································································12 11.2润滑油牌号······························································12 11.3密封装
置································································12 12. 其他技术说明（如对装配、拆卸安装和维护的注意事项及需要采取的重要措施等）···12 13. 结束语···································································12
参考资料（“资料编号，作者。书名。单位所在城市：名出版单位，出版年月”） 附图一：二级直齿圆柱齿轮减速器总装配图 附图二：减速器低速轴零件图
附图三：减速器低速级大齿轮零件图
一、前言
机械设计基础这门课是机械类专业很重要的一门基础课程，我们平时上课是按部就班地按照学，学的比较散，没有真正地联系贯通也没有实际用过，而课程设计将我们学的知识整个联系起来，让我们用自身学到的知识去处理实际问题，也真正贯彻我校 “学以致用” 的校训
二、设计任务书（附纸） 三．传动方案的分析和拟定
1. 组成：传动装置由电动机、减速器、工作机组成。 2. 特点：齿轮相对于轴承不对称分布，故沿轴向载荷分布不均匀，要求轴有较大的刚度。 方案图如下：
改
sbsnvepaccbhyujvicoq 四．电动机的选择
4.1电动机功率Ped的选择
电动机功率Ped，设：工作机（卷筒）所需功率PW，卷筒效率ηW，电机至卷筒轴Ⅲ的传动总效率ηa（减速器效率） 电机需要的功率Pd 计算如下：
V?3.14?350?60?1.1m
s60?100060?1000FV2900?1.1Pw?kw??3.19kw
10001000??Dn?轴承=0.99 ?齿轮?0.97 ?联轴器?0.99 ?卷筒?0.96
?a??轴承3??联轴器2??齿轮2?0.993?0.973?0.993?0.89?w??轴承??卷筒?0.99?0.96?0.95
Pd?pw3.19??3.77kw
?a·?w0.89?0.95查手册取Ped?4kW，对于Ped=4kW的电动机型号有四种： 型号 同步转速 Y112M-2 3000 r/min Y112M-4 1500 r/min Y132M1-6 1000 r/min Y160M1-8 750 r/min 满载转速 2890 r/min 1440 r/min 960 r/min 720 r/min 改4.2电动机转速的选择
已知卷筒转速为60r/min，二级减速器的总传动比合理围是ia=8~25。所以：电动机转速为nd=ia·n=480～1500 r/min，该围的转速有 750 r/min, 1000 r/min, 1500 r/min。 方案 电动机 额定功率电动机转速Ped（kW） r/min 4 4 4 同步转速 1500 1000 750 满载转速 1440 960 720 电动机重量（kg） 43 73 118 参考价格 减速器传动比ia 24 16 12 1 2 3 型号 Y112M-4 Y132M1-6 Y160M1-8 通过比较和计算，知道如果选用方案1，则在后面分配传动比时将出现i1=5.58,不符合教材P249页直齿传动比要求（i<3,最大可达5）。2号方案相对而言，其重量轻，价格便宜，传动比适中，故选2号方案。
4.3总传动比计算和分配各级传动比
由上表读出Ia=16，按浸油润滑条件考虑，取高速级传动比i1=1.3·i2 则 ia=1.3 i2·i2=1.3·i2所以i2=
2
ia=3.51，i1 =ia/i2=4.56.改 1.3
机械设计课程设计2
