重庆大学机械设计课程设计_圆锥圆柱减速器

机械设计课程设计 计算说明书

设计题目：圆锥-圆柱齿轮减速器

机械设计制造及其自动化 专业 班 设计者： 007 指导教师： ***

2011年6月13日

（重庆大学大学）

目录

1 设计任务书 ··························································································································· 3

························································································································· 3 设计课题 ·

已知数据 ························································································································· 3 工作条件 ························································································································· 3 生产批量 ························································································································· 3 要求完成的工作量 ············································································································· 3 2 电动机的选择和传动系统参数的选择和计算 ················································································· 4

电动机类型和结构的选择 ···································································································· 4 电动机功率的选择 ············································································································· 4 电动机转速的确定 ············································································································· 4 计算传动装置的总传动比，并分配传动比 ··············································································· 5 计算传动装置各轴的运动和动力参数 ····················································································· 5 3 传动零件的设计计算 ··············································································································· 6

高速级圆锥齿轮传动的设计与校核 ························································································ 6 低速级圆柱斜齿轮传动的设计与校核 ····················································································· 8 4 轴的设计计算 ······················································································································· 12

电动机的安装尺寸 ············································································································ 12 初定轴的最小直径 ············································································································ 12 选择联轴器 ····················································································································· 12 低速轴的设计 ·················································································································· 13 低速轴强度校核 ··············································································································· 13 5 键连接的选择计算 ················································································································· 16

低速轴键的选择 ··············································································································· 16 低速轴键的校核 ··············································································································· 16 6 滚动轴承的类型、代号及寿命计算 ···························································································· 17

低速轴轴承的选择 ············································································································ 17 轴承的寿命计算 ··············································································································· 17 9 箱体设计 ····························································································································· 18 10 润滑密封的选择 ··················································································································· 20 11 设计小结 ···························································································································· 21 12 参考资料 ···························································································································· 21

1 设计任务书

设计课题

设计一用于带动螺旋输送机的两级圆锥圆柱齿轮减速器。

已知数据

螺旋轴转矩 250N?m 螺旋轴转速70r/min

工作条件

三班制工作运送聚乙烯树脂材料，每班工作8小时，常温下连续、单向运转，载荷平稳，使用5年；螺旋输送机效率为0.92；室内工作。

生产批量

小批量生产。

要求完成的工作量

（1）设计说明书一份。

（2）圆锥-圆柱齿轮减速器A0装配图一张。

2 电动机的选择和传动系统参数的选择和计算 电动机类型和结构的选择 选择应用广泛的三相异步交流电动机。Y系列三相笼形异步电动机结构简 单、工作可靠、价格低廉、维护方便，故选用此系列电动机。全封闭自扇冷式结 构，电压380V。 电动机功率的选择 螺旋输送机所需要的工作功率： Fv2??70?250Pw???1.832kW 10001000Pw?1.832kW 电动机到工作机输送带间的总效率： 联轴器的效率?1?0.99 滚动轴承的效率?2?0.99 8级精度圆锥齿轮传动效率?31?0.94 8级精度圆柱齿轮传动效率?32?0.97 螺旋输送机效率?4?0.92 4????12?2?31?32?4?0.798 电动机所需工作功率： Pd?PW1.832??2.296kW η?0.798Pd?2.296kW 电动机转速的确定 二级圆锥-圆柱齿轮减速器传动比i???8~15，而工作机螺旋输送机的转速为 nw?70r/min。 所以电动机转速可选范围为： ?nd?i?nw?(8~15)?70?(560~1050)r/min 符合这一范围的同步转速为750r/min、1000r/min两种。综合考虑电动机 和传动装置尺寸、重量及价格等因素，为使传动装置结构紧凑，决定选用同步转