汽车起重机液压专业系统设计.doc

前 言 此次毕业设计选择课题是QY-8汽车起重机液压系统设计，选择本题是因为本题是大家见到最多液压系统。此次毕业设计选择课题是QY-8汽车起重机液压系统设计能使我愈加好了解汽车起重机及液压系统。并熟悉相关知识。 　　经过对汽车起重机液压系统研究和学习，熟练掌握了液压系统相关知识，并能在实际中实际应用，加强了对液压系统了解，增加了液压系统方面知识，拓宽了我知识面，使我知识不再局限于书本，能从实例中发觉问题、处理问题、学习问题。 本课题关键是液压起动问题。能经过参考文件用自己所学知识去设计一台汽车起重机液压系统，对一个毕业生来说是一件坚巨任务。我经过大量阅读资料和请教老师得到了相关知识，而且和同学们一起讨论并实地查看汽车起重机。 经过本课题我认识到所学不足，经过本课题使我学到了跟多知识并让我了解到所学不足。 摘 要 在中国，车载起重机发展已经有五十年历史了，因为受到客观条件限制，一度发展较慢。进入九十年代发展快速，但和国际优异水平还相差很远，关键表现在产品质量稳定性、自动化、智能化等方面。伴随国家基础建设规模不停加大，很多生产场所全部需要对设备、产品、零件、货物等进行搬运和位移，车载起重机在起重运输行业和野外作业发挥作用也将越来越大，市场也将越来越大。? 本文对车载起重机设计进行了研究，分章、节逐一叙述了设计过程。在设计过程部分，首先对装载起重机汽车底盘进行选择，确定起重机技术参数，关键就车载起重机液压系统进行叙述和设计，和对起重机关键机构如起升机构、回转机构型式和计算方法做出叙述，对回转机构机械装配部分也进行了设计，最终对影响起重机起重能力支腿型式及其跨距确实定进行了简明说明。? 设计汽车起重机能够满足使用功效要求，安全可靠，结构合理，重量轻，操作使用方便，对很多生产场所和起重运输等行业，含有很强现实意义。 关键词：车载起重机，液压系统，回转机构 液压缸 ABSTRACT The design and production of the vehicle-mounted crane have more than 50 year’s history in our country. The development of vehicle-mounted crane, however, was slow as the well known reason. Since 1990’s, it was accelerated in our country, but the products still could not reach the advanced international level in the quality stability, automation, and intelligent. With the need vehicle-mounted crane to move and shift production equipment, products, components and goods, etc. Vehicle-mounted crane in lifting the transport industry and the role of field operations will be increasing, and the market will be growing, too. In this paper, the design of truck crane is studied in detail and sub-chapter, each section is discussed in the design process. Choosing the vehicle chassis which loading the cranes is described at first. Next is to identify technical parameters of crane. And the design of the vehicle with the liquid press system is the key. The design method of main mechanisms of the crane, which includes the winch section and the rotary bearing section, is described. Mechanical assembly design of the rotary mechanism is also conducted. At last this paper gives a brief descri