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西安科技大学高新学院课程设计报告学院机电信息学院课程带式运输机传动装置的设计专业机械设计制造及其自动化班级机械姓名学号指导教师日期2015年1月14日1．培养理论联系实际的设计思想，训练综合运用机械设计和西安科技大学高新学院课程设计目的有关先修课程的理论，结合生产实际分析和解决工程实际问题的能力，巩固、加深和扩展有关机械设计方面的知识；2．通过制定设计方案合理选择传动机构和零件类型，正确计算零件工作能力、确定尺寸和选择材料，以及较全面的考虑制造工艺、使用和维护等要求，进行结构设计，达到了解和掌握机械零件、机械传动装置的设计过程和方法；3．进行设计基本技能的训练。例如计算、绘图、熟悉和运用设计资料（手册、图册、标准和规范等）以及使用经验数据、进行经验估算和处理数据的能力。在本课程设计鼓励采用计算机绘图。课程设计要求用计算机绘制减速器装配图1张（A0或A1号图纸）标题栏、明细表和技术要求均要写上，绘制零件图2张（A3或A4号图纸），分别是齿轮、轴，然后编写一份设计说明书。课程设计注意事项1、设计过程，轴的结构设计和减速器的外形尺寸的确定很难，一定要认真查阅相关资料，认真计算；2、在设计过程中，充分发挥自己的独立工作能力及创造能力，对每个问题都应进行分析、比较，并提出自己的见解；3、随时复习教科书、听课笔记及习题；4、及时了解有关资料，做好准备工作，充分发挥自己的主观能动性和创造性；5、认真计算和制图，保证计算正确和图纸质量；课程设计内容设计参数：1、运输带工作拉力：F=2.2kN；2、运输带工作速度：v=1m/s；3、卷筒直径：D=290mm；4、连续单向运转，载荷较平稳；5、使用寿命：使用年限8年；6、每年工作250天；课程设计简要操作步骤1、传动装置的总体设计方案；2、电动机的选择；3、传动装置的运动和动力参数；4、齿轮几何尺寸计算；5、齿轮材料选择和强度计算；6、轴的结构设计和强度校核；7、键连接设计计算；8、轴承选择、寿命计算；9、结构及其附件的设计；10、联轴器、润滑密封和连接键的选择和校验计算；11、画装配图和零件工作图；课程设计心得体会大学以来学了《理论力学》，《材料力学》，《机械原理》，《机械设计》，《互换性与测量基础》，《工程材料与成型技术基础》，还真不知道它们有什么用，我能将它们用在什么地方。通过这次课程设计，我发现以前学的理论基础课程还不是很牢固，没有真正联系实际。自己设计的数据和实践有很大差距，有的不符合机械设计指导书上的要求，还有就是知识的遗忘性大，不会将所学的知识融会贯通等等。这次设计培养了我综合应用机械设计课程及其他课程的理论知识和应用生产实际知识解决工程实际问题的能力，在设计的过程中还培养出了我们的团队精神，大家共同解决了许多个人无法解决的问题，在这些过程中我们深刻地认识到了自己在知识的理解和接受应用方面的不足，在今后的学习过程中我们会更加努力。课程设计评语及成绩评语成绩指导教师（签名）日期：附件：摘要齿轮传动是应用极为广泛和特别重要的一种机械传动形式，它可以用来在空间的任意轴之间传递运动和动力，目前齿轮传动装置正逐步向小型化，高速化，低噪声，高可靠性和硬齿面技术方向发展，齿轮传动具有传动平稳可靠，传动效率高（一般可以达到94%以上，精度较高的圆柱齿轮副可以达到99%），传递功率范围广（可以从仪表中齿轮微小功率的传动到大型动力机械几万千瓦功率的传动）速度范围广（齿轮的圆周速度可以从0.1m/s到200m/s或更高，转速可以从1r/min到20000r/min或更高），结构紧凑，维护方便等优点。因此，它在各种机械设备和仪器仪表中被广泛使用。本文设计的就是一种典型的一级圆柱直齿轮减速器的传动装置。其中小齿轮材料为40Cr（调质），硬度约为280HBS，大齿轮材料为45钢（调质），硬度约为240HBS，齿轮精度等级为7级。轴、轴承、键均选用钢质材料。关键词：减速器、齿轮、轴、轴承、键、联轴器I目录一设计内容及计算项目····················································································11.1传动方案拟定······················································································11.2电动机选择·························································································11.3确定电动机转速···················································································11.4确定电动机型号···················································································21.5计算总传动比及分配各级的传动比···························································21.6计算运动和动力参数·············································································2二传动零部件的设计计算·················································································42.1确定计算功率并选择V带的带型·····························································42.2确定带轮的基准直径并验算带速·······························································42.3计算大带轮的基准直径··········································································42.4确定V带的中心距和基准长度································································42.5计算实际中心距···················································································42.6计算带的根数······················································································5三齿轮的设计计算··························································································63.1齿轮材料和热处理的选择·······································································63.2齿轮几何尺寸的设计计算·······································································63.3齿轮弯曲强度校核················································································83.4齿轮几何尺寸的确定·············································································93.5齿轮的结构设计···················································································9四轴的设计计算····························································································114.1轴的材料和热处理的选择······································································114.2轴的设计···························································································114.3高速轴的设计·····················································································114.4低速轴的设计·····················································································14五键的校核·································································································195.1高速轴上键的校核···············································································195.2低速轴上键的校核···············································································19六轴承寿命的验算························································································206.1高速轴上轴承的寿命校核······································································206.2低速轴上轴承的寿命校核·····································································21七其他零部件设计························································································23八润滑密封及其它························································································258.1润滑································································································258.2密封································································································258.3其它································································································25九减速器附件的选择确定·····