展开式二级圆柱齿轮减速器设计说明书.doc

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目录

1设计要求············································································3

1.1设计任务··········································································3

1.2原始数据··········································································3

1.3工作与生产环境····································································3

2传动方案的拟定及说明································································3

3传动装置总体设计···································································43.1电动机的选择······································································43.1.1电动机类型和结构的选择··························································43.1.2电动机功率的选择································································43.1.3电动机转速的选择-································································4

3.2传动比的分配······································································5

3.3传动装置的运动和动力参数·························································6

3.3.1计算各轴的转速··································································6

3.3.2计算各轴的输入功率·······························································6

1设计要求

1.1设计任务

设计用于带式运输机的传动装置，要求传动系统中含有两级圆柱齿轮减速器及链传动。

1.2原始数据

运输带有效拉力F（N）

运输带速度V（m/s）

卷筒直径D(mm)

2200

1.1

250

1.3工作与生产条件

两班制工作，常温下连续单向运转，空载起动，载荷平稳，室内工作，环境有轻度粉尘，每年工作300天，减速器设计寿命10年，电压为三相交流电（220V/380V）。

运输带允许速度误差：±5％

2传动方案的拟定及说明

由题目所知传动机构类型为：展开式二级圆柱齿轮减速器。故只要对本传动机构进行分析论证。

本传动机构的特点是：结构简单，但齿轮相对于轴承的位置不对称，因此要求轴又较大的刚度。高速级齿轮布置在远离转矩输入端，这样轴在转矩的作用下产生的扭转变形和轴在弯矩作用下产生的变形可部分地互相抵消，以减缓沿齿宽载荷分布不均匀的现象。用于载荷比较平稳的场合。

计算内容及说明

计算结果

3传动装置总体设计

3.1电动机的选择

3.1.1电动机类型和结构的选择

因为本传动的工作状况是：两班制工作，常温下连续单项运转，空载起动，载荷平稳，室内工作，环境有轻度粉尘，电压为三相交流电（220V/380V）。所以选用常用的封闭式Y（IP44）系列的电动机。

3.1.2电动机功率的选择

1）计算电动机所需功率

2）计算总传动效率

按表1—2（《机械设计指导》P9）确定各部分效率为：齿轮（7级）、滚子链、弹性联轴器、滚子轴承、卷筒。

则总效率：

3）计算电动机的额定功率

则选择额定功率为4kW。

3.1.3电动机转速的选择

卷筒转速为

通常，二级圆柱齿轮传动比范围，连传动比范围为。则总传动比为

计算内容及说明

计算结果

电动机的转速为

查《机械手册》，符合的只有1500r/min和3000r/min二种4kW的电动机，数据与参数如表1。

表1

方案

电动机

型号

额定

功率

kW

电动机转速r/min

电动机质量

kg

总传

动比

同步

满