This paper according to the function of the crane to car,component and features,combined with the use of mobile crane status and development trend,design a can adapt to the construction of the light truck crane hydraulic system.QY40 type truck crane hydraulic system design is the cranes design process of the most important step.According to the technical index of the hydraulic system on the system overall plan,the function and working principle analysis,and preliminarily determines the system the basic structure of the loop and the main components,according to the performance parameters of the mechanism and hydraulic performance parameters calculation of choosing component,through calculating the performance of the system and fever structure,so as to meet the crane will reach requirements.The truck crane can meet the design requirements of the use function,safe and reliable,convenient in operation,can be applied to many engineering construction,with strong practical significance
帮忙翻译一下中文摘要,不要是英文软件翻译的啊,在线等