带式运输机的展开式二级直齿圆柱齿轮减速器设计.docx

目 录1. 设计任务书···························································································（3）2. 设计方案·····························································································（4）3.传动装置的总体设计········································································（5） 3.1 电机选择·························································································（5） 3.2 传动装置的总传动比及分配····················································（7） 3.3传动装置各轴的运动及动力参数··············································（7）4.传动件的设计·······················································································（9） 4.1 V带的设计·····················································································（9） 4.2 齿轮的设计··················································································（11） 5.轴及轴上零件的设计·······································································（22） 5.1 高速轴的设计············································································（22） 5.2 中速轴的设计·············································································（24） 5.3 低速轴的设计············································································（26）5.4 中间轴的校核············································································（28）6. 箱体结构的设计··············································································（32）7. 润滑及密封类型的设计··································································（32）8. 其他附件的设计··············································································（33）9. 参考文献····························································································（34）10. 课程设计心得··················································································（34）题号：F2，运输带工作拉力F/N：1600，运输带工作速度v (m/s)：1.15，卷筒直径D(mm)：230，工作条件：连续单向运转，工作时有轻微振动，使用期限10年，小批量生产，两班制工作，运输带工作速度允许误差为±5%。

2. 设计方案·根据任务书有以下设计方案：3.传动装置的总体设计3.1 电机选择设计内容计算及说明结 果1、选择电动机的类型按工作要求和工作条件选，选用用三相笼型异步电动机，其机构为封闭式结构，电压为380V,Y型2、选择电动机的容量工作机的有效功率为：PW=Fv1000kW=1600×1.151000=1.84kW从电动机到工作机输送带间的总效率为：ηa=η1η24η32η4η5式中：η1、η2、η3、η4、η5分别为带传动、轴承、齿轮传动、联轴器和转筒的传动效率 取η1=0.96, η2=0.98 （滚子轴承），η3=0.96,η4=0.99，η5=0.96，所以： ηa=0.96×0.984×0.962×0.99×0.96 =0.78所以电动机所需的功率：Pd=PW ηa=1.840.78=2.36kWPW=1.84kWηa=0.78Pd=2.36kW3、确定电动机的转速卷筒轴工作转速为n=60×1000vπD=60×1000×1.153.14×230 =95.54rmin根据传动比的合理范围，取V带传动的传动比i1,=2~4,二级圆柱齿轮减速器传动比i2,=8~40,则总传动比合理范围为ia,=16~160,故电动机转速的可选范围为nd,=ia,n=16~160×95.54=1529~15286rmin根据电动机的类型、容量和转速，由机械设计课程设计手册选定电动机的型号为Y100L-2，其主要性能如下表所示:电动机型号额定功率/k w满载转速/(r/min)堵转转矩额定转矩最大转矩额定转矩Y100L-2328702.22.3n=95.54r/min3.2 传动装置的总传动比及分配设计内容计算及说明结 果1、总传动比ia=nmn=287095.54=30.04ia=30.042、分配传动比ia=i1×i2×i3考虑润滑的条件，为使两级大齿轮相近，取i2=i3 ，i1=2,故：i2=ia2=30.42=3.90i2=i3=3.90i1=2i2=3.90i3=3.903.3传动装置各轴的运动及动力参数设计内容计算及说明结 果1、各轴的转数Ⅰ轴 nⅠ=nmi1=28702=1435rminⅡ轴 nⅡ=nⅠi2=14353.90=367.95rminⅢ轴 nⅢ=nⅡi3=367.953.90=95.54rmin卷筒轴 n卷=nⅢ=95.54rminnⅠ=1435rminnⅡ=367.5rminnⅢ=95.54rminn卷=95.54rmin2、各轴的输出功率Ⅰ轴：pⅠ=pd.η1=2.36×0.96=2.27kwⅡ轴：pⅡ=pⅠ.η2.η3=2.27×0.98×0.96=2.13kwⅢ轴：pⅢ=pⅡ.η2.η3=2.13×0.98×0.96=2.01kw卷筒轴：p卷=pⅢ.η2.η4=2.01×0.98×0.99=1.95kwpⅠ=2.27kwpⅡ=2.13kwpⅢ=2.01kwp卷=1.95kw3、各轴的输出转矩Td=9550×pdnm=9550×2.362870=7.85N.m故Ⅰ轴：TⅠ=9550×pⅠnⅠ=9550×2.271435=15.11N.mⅡ轴：TⅡ=9550×pⅡnⅡ=9550×2.13367.95=55.28N.mⅢ轴：TⅢ=9550×pⅢnⅢ=9550×2.0195.54=200.92N.m卷筒轴：T卷=9550×p卷n卷=9550×1.9595.54=194.92N.m将上述计算结果汇总与下表:带式传动装置的运动和动力参数Td=7.85N.mTⅠ=15.11N.mTⅡ=55.28N.mTⅢ=200.92N.mT卷=194.92N.m轴名功率P/k w转矩T/N. m转速r/min传动比i电动机轴2.367.852870 23.903.901Ⅰ轴2.2715.111435Ⅱ轴2.1355.28367.5Ⅲ轴2.01200.9295.54卷筒轴1.95194.9295.544.传动件的设计4.1 V带的设计设计内容计算及说明结 果1、带的型号的确定额定功率P=2.36 kW 根据工作情况由机械设计教材表8—7查的KA=1.2P ca=KA﹒p=2.832kw 根据功率Pca和小带轮转速nm=2870r/min按机械设计图8-11选择：普通V带Z型 普通V带V带Z型2、确定带轮的基准直径并验算带速查机械设计表8-6和表8-8 图8-11取小轮基准直径dd1=80mm带速v=πdd1nm60×1000=π×80×287060×1000=12.02ms因为5ms

根据nm=2870r/min，i=2和Z型带，查表8-4b得△P0=0.04kW查表8-5的Kα=0.96，表8-2得KL=1.18，于是 Pr= （P0+△P0）KαKL=0.68kWZ= P ca。