Design And Research On The Hydraulic Excavator

The hydraulic excavator is an important model for engineering machinery, and play a very important role in reducing the physical labor, ensuring the quality of engineering, speeding up project construction and increasing in labor productivity. Excavator performance level has become the key of the engineering construction progress, the excavating is more and more important in engineering fields.According to the relevant design standards and the field requirements, overall designed of the whole machine is finished. At the same time, the main performance parameters of the excavator are determined, calculated and checked to ment the design requirements. Considering the load characteristics under typical working conditions, the main parameters of the hydraulic system are determined. According this, the hydraulic system principle charts and the parameters of the main parts in hydraulic system are determined, such as the main pump, travelling motor and the cooling system.Based on the research of other scholars, the computational methods for theoretic excavating force of hydraulic cylinders and the machine are defined. The special working conditions are presented of the machine may encounter in the future. The logical operation scope of the excavating loader is determined during the design process. The solid model of backhoe is made under SolidWorks, and its static analysis is performed by using the finite element software. The distributions of stress and strain inside the backhoe are illustrated.The methods and the obtained results in this paper are helpful to develop the series excavator.