计算说明书设计题目：带式输送机班级：设计者：学号：指导老师：日期：2011年01月06日目录一、题目及总体分析································1二、选择电动机····································2三、传动零件的计算································71）带传动的设计计算·······························72）减速箱的设计计算·······························10Ⅰ.高速齿轮的设计计算·····························10Ⅱ.低速齿轮的设计计算·····························14四、轴、键、轴承的设计计算·······················20Ⅰ．输入轴及其轴承装置、键的设计·················20Ⅱ．中间轴及其轴承装置、键的设计·················25Ⅲ．输出轴及其轴承装置、键的设计·················29键连接的校核计算································33轴承的校核计算··································35五、润滑与密封···································37六、箱体结构尺寸·································38七、设计总结·····································39八、参考文献······································39一、题目及总体分析题目：带式输送机传动装置设计参数：传动方案输送带的牵引力F，（KN）输送带的速度V，（m/s）提升机鼓轮直径D，（mm）带传动＋两级齿轮减速7350设计要求：1).输送机运转方向不变，工作载荷稳定。2).输送带鼓轮的传动效率取为0.97。3).工作寿命为8年，每年300个工作日，每日工作16小时。设计内容：装配图1张；零件图3张；设计说明书1份。说明：带式输送机提升物料：谷物、型砂、碎矿石、煤炭等；输送机运转方向不变，工作载荷稳定；；工作寿命为8年，每年300个工作日，每日工作16小时。装置分布如图：二、选择电动机选择电动机类型和结构形式按工作条件和要求选用一般用途的Y系列三相异步电动机，卧式封闭。选择电动机的容量电动机所需的工作效率为：SKIPIF1<0SKIPIF1<0电动机功率;SKIPIF1<0SKIPIF1<0-工作机所需功率;工作机所需要功率为：SKIPIF1<0传动装置的总效率为：SKIPIF1<0按表2-3确定各部分效率：V带传动效率SKIPIF1<0，滚动轴承传动效率SKIPIF1<0SKIPIF1<0，闭式齿轮传动效率SKIPIF1<0,联轴器效率SKIPIF1<0，传动滚筒效率SKIPIF1<0，则SKIPIF1<0SKIPIF1<0所需电动机功率为：SKIPIF1<0选择的电动机的额定功率SKIPIF1<0要略大于PSKIPIF1<0，由Y系列三相异步电动机技术数据选择电动机额定SKIPIF1<0为KW。确定电动机转速工作机转速：SKIPIF1<0电动机转速可选范围：V带传动的传动比常用范围SKIPIF1<0，二级圆柱齿轮减速器传动比范围n*n=198SKIPIF1<0，故电动机转速的可选范围为：SKIPIF1<0查表可知，符合条件的电动机有三种，但综合考虑电动机和传动装置的尺寸，结构和带传动，以及减速箱的传动比，认为选择SKIPIF1<0电动机较为合理。其主要技术参数如下：电动机型号额定功率P（KW）同步转速（r/min）满载转速（r/min）SKIPIF1<0SKIPIF1<0SKIPIF1<0100096022电动机的相关尺寸：中心高H外形尺寸SKIPIF1<0底角安装尺寸A×B地脚螺栓孔直径K轴伸尺寸D×E键公称尺寸F×h132515×345×315216×1781238×8010×1324.计算传动比总传动比SKIPIF1<0为：SKIPIF1<0为使带传动外部尺寸不要太大，初步取SKIPIF1<0＝SKIPIF1<0分配减速器的各级传