文档介绍：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,QTZ40塔式起重机是由建设部长沙建设机械研究院设计的新型建筑用塔式起重机,该机为水平臂架,小车变幅,上回转自升式多用途塔机。
本设计的题目是固定式QTZ40塔式起重机起升系统的设计。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,其工作幅度为40米。
本设计书主要包括三部分:第一部分是QTZ40塔式起重机总体方案的选择及总体设计计算过程;第二部分是变幅机构的设计与计算:包括变幅机构的形式、确定卷筒尺寸、选择电动机、减速器、制动器、联轴器;验算实际变幅速度验算起、制动时间;电动机发热验算;卷筒强度的计算;第三部分是变幅小车的设计:包括变幅小车的形式、变幅小车的强度计算。
关键词:QTZ40塔式起重机总体设计:变幅系统
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 QTZ40 tower cranes are new tower cranes designed by Changsha Institute of the Ministry of Construction Machinery used in construction building. The aircraft is horizontal boom, trolley luffing, on the back or decanted from the tower-type multi-purpose machines .
The design topic is the stationary QTZ40 tower crane system and the design of lifting structure. 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 when it is being adhered. Its work scope is 40 meters.
This design book mainly includes three 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 characteris