QTZ40塔式起重机总体及平衡臂的设计

设计题目：QTZ40塔式起重机总体及平衡臂设计设计人：

摘要

塔式起重机作为建筑施工的主要设备，在建筑等行业发挥着极其重要的作用。塔式起重机属于臂架型起重机，由于其臂架铰接在较高的塔身上，且可回转，臂架长度较大，结构轻巧、安装拆卸运输方便，适于露天作业，因此大多数用于工业与民用建筑施工。

塔式起重机是为了满足高层建筑施工、设备安装而设计的新型起重运输机械。本次设计QTZ40塔式起重机为自升式上回转塔式起重机，能够随建筑高度的升高而加升、占地面积小和拆装方便等优点，塔机上部能借助于液压顶升机构，根据施工的建筑物的增高而相应地升高，使司机操作方便，视野宽并始终保持高清晰，主要适用于高层住房、高层建筑的施工。

本设计的题目是固定式QTZ40塔式起重机平衡臂的设计。QTZ40塔式起重机有多种形式，此次设计的形式为上回转液压顶升自动加节，可随着建筑物的升高而升高，固定式高度为30米，在附着状态下可达到100米。

本设计书主要包括四部分：第一部分主要是对现今国内外塔式起重机的发展现状、趋势以及QTZ40塔式起重机特点、应用场合，做了一个简要的概述；第二部分是QTZ40塔式起重机总体方案的选择及总体设计计算过程；第三部分是平衡臂设计和计算。

关键词： QTZ40塔式起重机平衡臂设计

设计题目：QTZ40塔式起重机总体及平衡臂设计设计人：

ABSTRACT

As an important facility, the tower crane plays an important role in construction industry. The tower crane belongs to the arm rack type crane. Its arm is hinged on the high tower body, and it may rotate. It has longer arm, dexterous structure. What’s more, it is easy to be assembled, disassembled and transported. It is suitable for the open-air work and mainly used for industry and civil construction

Tower cranes are to meet high-rise construction building, equipment installation and design as a new type machinery of lifting transport. The form of this design is tower crane ，the rotating structure of the QTZ40 tower crane is on the top. To the building of the height of the rise and add up, this crane covers an small area and open a convenient advantages of the tower on top of the department have the promotion, according to the construction of buildings improves and correspondingly increase, the driver is easy to operate with wide and remained high, which is applied to the construction of the high buildings.

The design topic is the stationary QTZ40tower crane system and the design of jack arm. There are many kinds of QTZ40 tower crane. The form of this design is as below. With an upper rotating hydraulic pressure propping system, the machine could add height automatically and thus rise with the building ascension. The stationary type is 30meter high; it could reach the height of 100meters.

This design book mainly includes four parts. The first part summarizes the present situation and the development tendency of the Tower crane in both our country and abroad, as well as the characteristic and application occasion. The second part is the QTZ40 tower crane overall concept choice and the system design computation process; the last part is the organization design and the computation of jack arm.

KEY WORDS: QTZ500 tower crane jack arm design

设计题目：QTZ40塔式起重机总体及平衡臂设计设计人：

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 (1)

第二章总体设计 (2)

2.1 概述 (2)

2.2 确定总体设计方案 (2)

2.2.1 金属结构 (2)

2.2.2 工作机构 (19)

2.2.3 安全保护装置 (27)

2.3 总体设计设计总则 (29)

2.3.1 整机工作级别 (29)

2.3.2 机构工作级别 (29)

2.3.3主要技术性能参数 (30)

2.4 平衡臂与平衡重的计算 (30)

2.5 起重特性曲线 (32)

2.6 塔机风力计算 (34)

2.6.1 工作工况Ⅰ (34)

2.6.2 工作工况Ⅱ (38)

2.6.3 非工作工况Ⅲ (40)

2.7整机的抗倾翻稳定性 (43)

2.7.1工作工况Ⅰ (44)

2.7.2工作工况Ⅱ (45)

2.7.3工作工况Ⅲ (46)

2.7.4工作工况Ⅳ (47)

2.8固定基础稳定性计算 (49)

第三章平衡臂结构设计及计算 (51)

3.1 平衡臂总体结构设计 (51)

3.2 平衡臂计算 (51)

3.2.1 计算简图及工况 (51)

3.2.2 平衡臂稳定性计算 (54)

3.2.3载荷计算 (55)

3.3 拉杆受力计算 (59)

3.4 平衡重设计及计算 (59)

3.4.1 平衡重设计 (59)

3.4.2 计算 (59)

3.4.3校核 (60)

第四章毕业设计小结 (63)