液压挖掘机液压系统故障点维修与调试论文.doc

液压挖掘机液压系统故障点维修与调试毕业设计 毕业 设 计 论 文课 题:液压挖掘机液压系统故障点维修与调试 姓 名: 学 号: 系 别:机械工程系 专 业:机电一体化 班 级:机电111 指导老师:尹霞 摘 要 本次毕业设计课题是小型液压挖掘机液压系统故障点维修与调试。设计思路是根据液压挖掘机各部分的动作要求,参照同类型其他液压挖掘机来设计。随着我国基础设施建设的大力投入和发展,液压挖掘机是工程机械的一个重要品种,是一种广泛用于建筑、 铁路、公路、水利、采矿等建设工程的土方机械。液压挖掘机利用液压元件(液压泵、液压马达、液压缸等)带动各种构件动作,具有许多优点,于是它对液压系统的设计提出了很高的要求,其液压系统也是工程机械液压系统中最为复杂的。因此,对挖掘机液压系统的分析和液压系统故障点的维修与调试对推动我国挖掘机发展具有十分重要的意义。针对液压挖掘机液压系统经常出现故障的问题,通过对液压系统故障原因的分析,提出了相应的解决措施,并指出了液压系统故障诊断时应遵循的一般原则及注意事项。 【关键词】液压挖掘机; 液压系统;检查;维修;诊断 Abstract This graduation design is a small hydraulic excavator hydraulic system fault repair and debug. The design is based on the hydraulic excavator action requirements, refer to the same type of other hydraulic excavator design. With strong investment and the development of infrastructure in China, the hydraulic excavator is an important variety of engineering machinery, is a kind of earth moving machinery widely used in construction, railway, highway, water conservancy, mining and other construction projects. Hydraulic excavator using hydraulic components hydraulic pump, hydraulic motor, hydraulic cylinder to drive various component action, which has many advantages, and put forward a very high request to the design of the hydraulic system, the hydraulic system of engineering machinery hydraulic system is the most complex. Therefore, repair and debug the analysis of excavator hydraulic system and hydraulic system fault point is very important for promoting the development of Chinas excavator has. According to the hydraulic excavator hydraulic system often appear problem, through the analysis of the causes of the failure of hydraulic system, puts forward corresponding solving measures, and points out the general principles and the matters needing attention should follow the fault diagnosis of hydraulic system. [keyword] hydraulic excavator; hydraulic system; inspection; repair; diagnosis 一、前言 6 1、挖掘机简介 6 2、本设计