机械设计带轮大作业

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1、设计题目设计驱动离心鼓风机的V带传动机械院（系）车辆工程专业班级093学号设计人指导教师完成日期2010年5月22日目录一．设计任务书·······················································11.总体布置····································································12.原始数据·················································

2、···················13.设计要求····································································14.设计内容····································································1二．V带传动的设计··················································1三．V带的结构设计··············

3、·····································41.带轮的材料··································································42.带轮的结构形式······························································53.带轮的基本结构尺寸··························································

4、5四．主动带轮装配简图设计·············································61.圆头普通平键设计····························································62.轴端挡圈设计································································63.螺栓设计············································

5、························64.弹簧垫圈····································································6五．小带轮装配图····················································6六．设计小结························································6七．参考资料·······················

6、··································7设计计算及说明结果一、设计任务书1.总体布置主动轮1装在电动机轴上，从动轮2装在鼓风机轴上，两带轮中心的水平距离a等于大带轮直径的2倍。简图如右图所示2.原始数据电动机型号：Y112M-4鼓风机转速n2(r/min):1440一天工作时间（h）：163.设计要求（1）绘制小带轮装配图一张（2）编写设计计算说明书一份4.设计内容（1）V带传动的设计带的型号、根数、长度，带轮尺寸，带传动中心距，作用下周上的压力（2）V带轮的结构设计带轮

7、的材料、结构型式，计算基本结构尺寸等。二、V带传动的设计由已知的电动机型号Y112M-4，查参,可得电动机的额定功率P=4kw,满载转速=1440r/min，传动装置应有的传动比i=1.92，每天工作16小时1.确定计算功率Pc由参考表9-6（p230）查得工作情况系数KA=1.1，故2.选择V带的带型根据Pc和小带轮转速由图9-11（P229）选用A型。3.确定带轮的基准直径并验算带速v（1）初选小带轮的基准直径dd1，由P230的表9-7，可取小带轮的基准直径dd1=150mm。=i×dd1=28

8、8mm再由表9-7基准直径系列选=280mm。取n2=1440r/minP=4kw=1440r/mini=1.92=1.1Pc=4.4kw=0.015，则实际传动比i==1.90，传动比偏差为1.04%。（2）验算带速v因为5m/s