北航机械设计课程设计
机械设计课程设计 计算说明书
设计题目：带式运输机传动装置设计III
自动化科学与电气工程学 院100321 班
设计者： 王尼玛
指导教师： 陈心颐
北京航空航天大学
目录
前言························································································4
一、设计任务书··········································································5
1. 设计要求···············································································5 2. 原始数据···············································································5 3. 设计任务···············································································5
二、机械装置的总体设计方案··························································5
1. 整体方案···············································································5 2. 减速器说明·············································································6 3. 电动机的选择···········································································6 4. 传动比的分配···········································································6 5. 运动及动力参数的计算···································································6
三、主要零部件的设计计算·····························································7
一）闭式齿轮零件的计算及结构说明···························································7 1. 齿轮的材料选择·········································································7 2. 按齿轮的弯曲强度设计计算·······························································8 3. 验算齿面的接触强度·····································································9 4. 弯曲强度校核···········································································9 5. 齿轮的尺寸参数·········································································9 二）开式齿轮零件的计算及结构说明··························································10 1. 齿轮的材料选择········································································10 2. 按齿轮的弯曲强度设计计算······························································10 3. 验算齿面的接触强度····································································11 4. 弯曲强度校核··········································································11 5. 齿轮的尺寸参数········································································11 三）轴的设计计算及校核····································································12 1. 轴的选材及许用应力····································································12 2. 按扭矩估算最小直径 ···································································12 3. 轴的结构设计··········································································12 4. 危险截面的强度校核····································································12 四）滚动轴承的选择与寿命校核······························································17 1. 轴1配套轴承选择······································································17 2. 轴2配套轴承选择······································································18 五）键的选择与校核········································································19 1. 联轴器的键············································································19
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2. 闭式齿轮孔的键········································································19 3. 开式齿轮孔的键········································································19 六）联轴器的选择与校核····································································19
四、减速器箱体及附件的设计，减速器的润滑及密封·······························20
1. 减速器箱体设计及附件设计······························································20 2. 减速器的润滑··········································································21 3. 密封形式的选择········································································22
五、其它技术说明······································································22
六、参考文献············································································23
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前言
设计背景：
机械设计课程设计是各大高校工科学生的必修课，也是培养学生机械设 计能力的基础课程，其重要性和意义是十分显然的。
设计目的：
(1)以机械系统运动方案设计与拟定为结合点，把机械设计课程中分散于各章 的理论和方法融会贯通起来，进一步巩固和加深学生所学的理论和知识； (2)通过拟定减速器的方案，使我们初步具有机构和零件配合的组合能力； (3)进一步提高我们运算、绘图、整理和查阅技术资料的能力；
(4)通过编写说明书，培养我们的表达、归纳、总结和独立思考与分析的能力。
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