Research On Performance Matching For The Hydraulic Excavator’s Attachment And The Hydraulic System Based On Dynamics Collaborative Simulation

The large hydraulic excavator is an high-tech equipment of complex electro-mechanical and hydraulic system.And it has been gradually widely used in the strip coal mining and the water conservancy project.At present,almost all of the large hydraulic excavator market was dominated by foreign brands in China,especially the large face-shovel hydraulic excavator for the open-pit mining is hardly any.For the hydraulic system technology monopoly by the foreign and the lack of design experience in domestic in the research project of the large face-shovel hydraulic excavator,it often cause that the matching performance for the digging resistance of the excavator attachment and the hydraulic system is unreasonable,which directly affect the work performance of the excavator.In order to enhance the independent development of the large hydraulic excavator in China.in this article,it is proposed the multi-disciplinary collaborative simulation method,and it is carried on that "Research on performance matching for digging resistance of the large face-shovel excavator attachment and hydraulic system based on the multi-disciplinary collaborative simulation",for the research and development program in large hydraulic excavator enterprise.The specific contents are as follows:For the characteristic and the design requirement of the excavator hydraulic system,which has been applied in one type of face-shovel excavator,it analyzes emphatically the control characteristic of hydraulic pump,the basic circuit of hydraulic system and the pump-valve system control model.And the hydraulic system is improved and verified in the original basis,so it provides some reference for system design.Based on the dynamics model of the face-shovel excavator attachment,it theoretically analyzes the kinetic characteristic of the excavator,the digging force,the digging resistance and the gyration torque resistance in the excavator working process.And the working range parameter,the mining envelope and the maximum digging force of the excavator are obtained by simulation in ADAMS/View,The results indicate the correctness of the attachment mechanical system model.The multi-disciplinary collaborative simulation method is proposed.In order to accurately simulate the Digging Resistance in the excavator working process,it build the mineral pile in EDEM,and it is verified the accuracy by simulation.The hydraulic system of the excavator attachment is built based on AMESim,Then by using the interface module between AMESim and ADAMS,importing the EDEM digging resistance model,the mechanical-liquid-load system simulation model is accomplished and it can accurately simulate the actual working process of the excavator.By the simulation analysis of the excavator working process,it obtains performance parameters of hydraulic system under various operating conditions,and the influencing factor of the energy consumption of the system and the efficiency of the system,the result verified the parameter matching rationality.Then under different load conditions,it analyzes the influence on performances of the hydraulic system.Finally,it carries on simulation analysis of the flow regeneration when the boom drops down,the results show that the flow regeneration system has a certain energy-saving effect,and the efficiency of the system is more efficient.The innovative point of the paper is that the mechanical-liquid-load system simulation model is built based on the multi-disciplinary collaborative simulation method.The research results provide effective technical reference and theoretical basis for the design of the large face-shovel hydraulic excavator of the enterprise,and it has important practical significance to promote technological advancements of China Excavator industry.