机械设计基础课程设计说明书
设计题目： 减速齿轮箱 专 业：热能与动力工程 学生姓名： 学 号： 班 级：
指导教师：
2014年7 月 12
日
目 录
一、 传动装配的总体设计
1.1 电机的选择················································3 1.2 求传动比··················································3 1.3 计算各轴的转速、功率、转矩 ·······························4
二、 链的设计计算·············································4 三、 齿轮的设计
3.1 原始数据··················································5 3.2 齿轮的主要参数············································5 3.3 确定中心距················································6 3.4 齿轮弯曲强度的校核 ·······································7 3.5
齿轮的结构设计············································7
四、 轴的设计计算
4.1 轴的材料的选择和最小直径的初定····························8 4.2 轴的结构设计··············································8 4.3 轴的各段直径 ·············································8 4.4 各轴的轴向距离 ···········································9 4.5
轴的弯曲强度的校核········································10
五、 滚动轴承的选择
5.1 滚动轴承的选择············································10
六、 键连接的选择与计算
6.1 键连接的选择和校核······································· 10
七、 联轴器的选择
7.1 类型选择 ··············································12 7.2 计算转矩 ··············································12 7.3 型号选择 ··············································12
八、 润滑方式、润滑油型号及密封方式的选择
8.1 润滑方式、润滑油型号的选择·································12 8.2 减速器密封方式的选择·······································12
九、 箱体及附件的结构设计和选择
9.1 箱体的结构尺寸············································12 十、 参考资料 ············································13
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机械设计课程设计计算说明书 设计要求：
工作年限：8年 工作班制：2 工作环境：清洁 载荷性质：平稳 生产批量：小批
技术参数：
滚筒圆周力：2200N 滚筒直径：300mm 带 速：1.8m/s 滚筒长度：400mm
齿轮箱设计原理简
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图
一、传动装配的总体设计 1.1电机的选择 pw—工作机所需功率, kw; pe—电动机的额定功率, kw； pd—电动机所需功率, kw； ??123电动机到工作机的总效率为，，，， ?4，?5分别是链传动、滚动轴承、闭式齿轮传动（齿 轮精度为8级）、联轴器、卷筒的传动效率。 ?0.97?0.99?0.98?0.90 3421、、、、 ???? ???5?0.96 Pw=3.96kw η=0.797 pw—工作机所需功率, kw pw?F?V2200?1.8??3.96Kw10001000 3???1??2??3??4??5?0.797pd?pe?p?pd=pe=4.97kw w?4.97Kw 总传动比 8.34 Y132M2-1.2求传动比 6 计算各轴的转速 轴1转速 同步转满载转额定功速 速 率 （r/min（r/min（kw） ） ） 5.5 1000 960 n电=960r/min n1=480r/min n电=960r/min 3
n 960???480r/minn1 2i1,2轴2转速 4800n1???115r/min n24.17i2,3 60?1000?1.860?1000?1.8 ???115r/minw?D3.14?300 960 1i???8.34 1152 ?22,3?4.171,21.3计算各轴的 转速、功率、转 矩 各轴转速 1 2 ???4.473kw轴1的输入功率 11d ????4.473?0.98?0.97?4.25Kw轴2的输入功率 2321 轴1的转矩 4.473 1?9550??9550??88.94N.m1 4801 轴2的转矩 4.25 2?9550??9550??352.93N.m2二、链的设计计1152 算 传动比 1,2 小链轮齿数 由《机械设计基础》P236表13-13得 Z1=27 Z2=54 初定中心距 a0?40p 链条节数 n2=115r/min nw=115r/min n i=8.34 iiiii?2 i2,3?4.17 1,2n?960r/minn?115r/minpp?pn p?4.473kw 1 pp??p 2?4.25kw TT1=88.94N.m TpnT2=352.93N.m Z1=27 Z2=54 Lp=121 4 i?2