QTZ125塔式起重机总体 臂架、变幅机构设计（63m吊臂）【全套CAD图纸+WORD毕业论文】【工程机械】

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1、毕业设计（论文）目的：
本次毕业设计是对机械专业学生在毕业前的一次全面训练，目的在于巩固自己所学知识并把所学知识运用到实际设计当中，真正明白知识如何应用。训练学生综合运用所学知识分析和解决问题的能力。将所学知识应用与实际培养独立工作能力。毕业设计要求每个学生在工作过程中，要独立思考，刻苦钻研，有所创新、解决相关技术问题。通过毕业设计，使学生掌握塔式起重机的总体设计、塔身的设计、整体稳定性计算等内容，为今后步入社会、走上工作岗位打下良好的基础。
2、毕业设计（论文）任务内容和要求（包括原始数据、技术要求、工作要求等）：
（1）设计任务：
①总体参数的选择（QTZ125级别）
②结构形式
（2）总体设计
①主要技术参数性能
②设计原则
③平衡重的计算
④塔机的风力计算
⑤整机倾翻稳定性的计算
（3）变幅机构的设计和计算
①   建立变幅机构的数学模型
②   钢丝绳的选择和校核
③   卷筒的设计和绕绳系统的计算
④   验算实际变幅速度
⑤   电动机的选择
⑥   蜗轮蜗杆减速器的设计
（4） 臂架的设计和计算
①   分析单双吊点的优缺点
②   吊点位置的选择
③   臂架结构参数选择
④   臂架主参数选择与计算

（5）变幅的设计和计算
（6） 要求
①   主要任务：学生应在指导教师指导下独立完成一项给定的设计任务，编写符合要求的设计说明书，并正确绘制机械与电气工程图纸，独立撰写一份2500~~3500字毕业设计小论文，并绘制有关图表。
②   知识要求：学生在毕业设计工作中，应综合运用多学科的理论、知识与技能，分析与解决工程问题。通过学习、钻研与实践，深化理论认识、扩展知识领域、延伸专业技能。
③   能力培养要求：学生应学会依据技术课题任务，完成资料的调研、收集、加工与整理，正确使用工具书；培养学生掌握有关工程设计的程序、方法与技术规范，提高工程设计计算、图纸绘制、编写技术文件的能力；培养学生掌握实验、测试等科学研究的基本方法；锻炼学生分析与解决工程实际问题的能力。
④   综合素质要求：通过毕业设计，学生应掌握正确的设计思想；培养学生严肃认真的科学态度和严谨求实的工作作风；在工程设计中，应能树立正确的生产观、经济观与全局观。
⑤ 设计成果要求：
1）凡给定的设计内容，包括说明书、计算书、图纸等必须完整，不得有未完的部分，不应出现缺页、少图纸现象。
2）对设计的全部内容，包括设计计算、机械构造、工作原理、整机布置等，均有清晰的了解。对设计过程、计算步骤有明确的概念，能用图纸完整的表达机械结构与工艺要求，有比较熟练的认识图纸能力。对运输、安装、使用等亦有一般了解。
3）说明书、计算书内容要精练，表述要清楚，取材合理，取值合适，设计计算步骤正确，数学计算准确，各项说明要有依据，插图、表格及字迹均应工整、清楚、不得随意涂改。制图要符合机械机械制图标准，且清洁整齐。小论文要符合论文书写规范。
4）对国内外塔式起重机情况有一般的了解，对各种塔式起重机有一定的分析、比较能力。
其他各项应符合本资料有关部分提出的要求。
3、毕业设计（论文）成果要求（包括图表、实物等硬件要求）：
①  计算说明书一份
  内容包括：设计任务要求的选型、设计计算内容、毕业实习报告等。作到内容完整，论证充分（包括经济性论证），字迹清楚，插图和表格正规（分别进行统一编号）、批准，字数要求不少于2万字；撰写中英文摘要；提倡学生应用计算机进行设计、计算与绘图。
  ②  图纸一套
1）总图一张（0号）
2）变幅机构图一张（0号）
3）臂架图一张（0号）
4）零件图至少三张（2，3，4号）
③  3000字左右的毕业设计小论文一篇
4、主要参考文献：
要求按国标GB 7714—87《文后参考文献著录规则》书写。
[1] 哈尔滨建筑工程学院主编.工程起重机.北京：中国建筑工业出版社
[2] 董刚、李建功主编.机械设计.机械工业出版社
[3] 机械设计手册.化学工业出版社（5册）
[4] GB/T9462—1999  塔式起重机技术条件
[5] GB/T13752—1992  塔式起重机设计规范
[6] GB5144—1994  塔式起重机安全规程
[7] 濮良贵、纪名刚主编.机械设计（第八版）.高等教育出版社

目录
第一章 前言··················································································1
1.1塔式起重机概述············································································1
1.2塔式起重机的发展趋势····································································3
第二章 总体设计············································································4
2.1 概述························································································4
2.2 总体设计方案的确定······································································5
2.2.1金属结构·················································································5
2.2.2工作机构················································································25
2.3 总体设计原则············································································29
2.3.1 整机工作级别··········································································32
2.3.2 机构工作级别··········································································32
2.3.3 主要技术性能参数····································································32
2.4平衡臂与平衡重的计算···································································33
2.5起重特性曲线·············································································35
2.6塔机风力计算·············································································37
2.6.1工作工况Ⅰ············································································38
2.6.2工作工况Ⅱ·············································································42
2.6.3工作工况Ⅲ·············································································44
2.6.4非工作工况Ⅳ···········································································46
2.7整机的抗倾翻稳定性·····································································48
2.7.1工作工况Ⅰ·············································································49
2.7.2工作工况Ⅱ·············································································50
2.7.3非工作工况Ⅲ···········································································51
2.7.4工作工况Ⅳ·············································································51
第三章 塔身的设计计算·································································52
3.1塔身的总体模型···········································································52
3.2 塔身的受力分析及验算··································································53
3.2.1.塔身的受力分析·······································································53
3.2.2 塔身内力计算及组合··································································56
3.2.3 塔身整体稳定性和强度验算··························································59
第四章 变幅机构的设计和计算························································71
4.1变幅机构的形式··········································································71
4.2 确定卷筒尺寸············································································71
4.2.1 卷筒名义直径··········································································71
4.2.2 多层绕卷筒相关参数计算····························································72
4.3选择电动机、减速器、制动器、联轴器····················································72
4.3.1选择电动机·············································································72
4.3.2 选择减速器············································································73
4.3.3 变幅机构制动器的选择·······························································74
4.3.4变幅机构联轴器的选择································································75
4.4. 验算变幅速度···········································································77
4.5验算起、制动时间验算····································································77
4.6电动机发热校验···········································································79
4.7 校验卷筒强度············································································80
第五章  变幅小车的设计·······························································80
5.1 变幅小车的形式··········································································80
5.2 变幅小车的设计··········································································81
5.2．1 绳索牵引式小车构造及其驱动方式················································81
5.2.2运行小车牵引力计算···································································82
5.2.3 牵引绳最大张力·······································································85
5.2.4 选择牵引绳············································································86
5.2.5 牵引卷筒计算··········································································86
第六章 毕业设计小结····································································89
致谢····························································································90
参考书目·······················································································92