高速轴轴系部件设计

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1、哈尔滨工业大学机械设计作业设计计算说明书题目：设计齿轮传动高速轴的轴系部件系别：班号：姓名：日期：2014.11.29哈尔滨工业大学机械设计作业任务书题目：设计带式运输机中的齿轮传动设计原始数据：带式运输机传动方案如图1所示。图1带式运输机运动方案及各轴名称原始数据见表1表1带式运输机设计中的已知数据电动机工作功率Pd（kW）电动机满载转速工作机的转速第一级传动比轴承中心高H（mm）最短工作年限工作环境3960901.81508年1班室外、有尘14目录1轴材料的选择···············································32初算轴径·········

2、··········································33结构设计···················································33.1确定轴的轴向固定方式··································43.2确定轴承类型及其润滑和密封方式·························43.3确定各段轴的径向尺寸··································43.4确定轴承端盖的尺寸·····································53.5确定各段

3、轴的轴向尺寸··································53.6确定各段轴的跨距·······································63.7确定箱体的尺14寸·········································63.8确定键的尺寸···········································74轴的受力分析···············································74.1画出轴的受力简图································

4、·······74.2计算轴承的支承反力·····································74.3画出轴的弯矩图·········································74.4画出轴的转矩图·········································95校核轴的强度···············································95.1按弯扭合成强度计算·····································95.2轴的安全系数校核计算·················

5、··················9146校核键连接的强度··········································117轴承寿命计算··············································118绘制高速轴装配图··········································129参考文献··················································121轴材料的选择因传递功率不大，且对质量及结构尺寸无特殊要求，故需选用常用材料45钢，并调质处理。2初算轴径由V带传动

6、的设计计算和齿轮传动的设计计算可得各轴的运动参数和动力参数见表2。表2各轴的运动及动力参数轴名功率P/kW转矩T/(N·m)转速n/(r/min)传动比i效率η电机轴329.89601.80.96Ⅰ轴2.8851.495335.90.96Ⅱ轴2.77291.739010.9814卷筒轴2.71285.9290高速轴作为转轴，这里按照扭转强度初算轴径式中：——高速轴（即I轴）传递的功率，kW，由表2可知，；——高速轴的转速，，由表2可知，；C——由许用扭转剪应力确定的系数，查参考文献[1]表10.2得，取。由上述数据计算轴径得由于轴上有一个键槽，因此，轴径需要增大5%，即根据GB/T282

7、2—2005系列圆整得。3结构设计3.1确定轴的轴向固定方式因为高速轴的跨距不太大，而且齿轮减速器效率较高、发热小，温度变化不大，故轴的轴向固定可采用两端固定方式。3.2确定轴承类型及其润滑和密封方式因为轴承所受轴向力很小，故选用深沟球轴承。因为轴承转速不高，并且轴承内径也较小，其速度速度因数，故轴承的润滑方式选择脂润滑。因为带式运输机的工作环境是有尘的，故轴承的密封方式选择唇形圈密封。3.3确定各段轴的径向尺寸图2各轴段示意图⑦⑥