液压起重机变幅系统设计学士学位.doc

液压起重机变幅系统设计 摘 要 随着经济建设的飞速发展，我国的基础建设力度正逐渐加大道路交通机场港口水利水电市政建设等基础设施的建设规模也越来越大市场上液压起重机的需求也随之增加。液压起重机是各种工程建设广泛运用的重要起重设备用来对物料进行起重、运输、装卸或安装等作业的机械设备作为主要施工机械在工业和民用建筑中得到广泛运用。它对减轻劳动强度、节省人力降低建设成本提高施工质量加快建设速度实现工程施工机械化起着十分重要的作用。 本设计的主要任务是《新编液压工程手册》和《机械设计手册》 关键词 液压起重机；变幅机构；变幅 Hydraulic crane luffing system design Abstract With the rapid economic development, Chinas infrastructure is enlarging gradually. Road traffic, airport, port, water conservancy and hydropower, municipal construction and other infrastructure construction scale is more and more. Market demand increases hydraulic crane. Hydraulic crane is an important hoisting equipment widely used in various engineering construction. It is used for lifting, transportation, loading and unloading and installation work on material mechanical equipment. As the main construction machinery in the industrial and civil construction has been widely used. It is to reduce labor intensity, save manpower, reduce the cost of construction, improve construction quality, speed up the construction, engineering construction mechanization plays a very important role. The design of the main tasks is to access relevant information and documents, to determine the three hinge luffing system of crane luffing mechanism scheme and the position. According to known data, luffing hydraulic cylinder to the crane design and calculation. According to drawings and CAD data drawing calculation. Finally, other major components of the luffing system selection. Design and calculation of amplitude hydraulic cylinder luffing system is the emphasis of the whole system design. Design and calculation of amplitude hydraulic cylinder is the main reference New Hydraulic Engineering Handbook and Mechanical Design Manual in the formula. Key words: Hydraulic crane；Luffing mechanism；Luffing cylinder 目 录 摘要 I Abstract II 1 1.1 课题研究的意义 1 1.2 国内外发展现状与趋势 1 第2章 变幅系统方案和变幅机构三铰点的确定 4 2.1 变幅系统方案的确定 4 2.1.1 变幅机构布置形式的确定 4 2.1.2 变幅机构液压回路方案的确定 5 2.2 变幅机构三铰点的确定 5 2.2.1 三铰点的运动和受力要求