The Simulation Analysis Of The Hydraulic Work Elements Based On The Virtual Prototype Technology

Hydraulic excavators,which are widely used in transportation, water conservancy and hydropower project, mine-excavating and many other industries, are a large-scale construction machinery and play a key role in raising labor productivity. So it's important to design and research the excavator. However, in China, because of the cycle length of the new product development, high cost and old designing method, homemade excavators age serious and have no advantage in market competition comparing with overseas excavators. Now, along with gradual maturity of the technical of virtual prototype, one could use it to design excavators, then, the questions mentioned above can be solved easily.This paper elaborates about the research condition of the technical of virtual prototype, and the trend of domestic and overseas technology. Because of the limitations in the design of hydraulic excavators, virtual prototype technology is applied in this domain. Based on the study of motion of hydraulic excavator's working equipment, 3D(Three Dimensional) model components of a hydraulic excavator are set up, and in the end an excavator virtual prototype was found using the Pro/E software in Chapter 3. Then, in Chapter 4,the preprocess is completed, and validity of the model is verified in the analysis software ADAMS. To analyze the movement of the excavator working equipment, the main dimensions, the drawing of working range about the excavator and the efficiency of multi-hydraulic-cylinder movement is obtained. According to the analysis of the resistance of the bucket's tooth, the dynamics analysis of the whole excavator is completed and the forces of articulated points between boom, arm, bucket and other components and the correspond curves are measured, which provides the basis for further analysis of the intensity of excavator components. Finally based on the parameter-processing of the hydraulic excavator, it is shown that the change in geometry of four-link mechanism of bucket has great influence on the transmission ratio and excavating force, which can supply a good reference for the optimization of transmission ratio.