CHEN Ye1, LI Aifeng2, LI Guang2, TAN Lei2, 

CHEN Yongchun1, SHE Yini1, NING Xiaobin1

 

(1. College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China;

 

2. Technology Center, Taiyuan Heavy Industry Co., Ltd., Taiyuan 030023, China)

 

 

Abstract: Aiming at the problems of the poor performance for hydraulic excavator, which caused by the lacking of critical data of excavator′s crowd force and it can only use analogy method to design working device and hydraulic system of large faceshovel hydraulic excavator, a simulation method in the evaluation of crowd force was prososed. The discrete element method was used in EDEM to establish the model of ore heap and select HertzMindlin (noslip) contact model to caculate the contact force. The crowd force was analyzed in the simulation of hydraulic excavator mining condition. Then MSC.ADMAS was used to calibrate the data of working device and hydraulic system of the excavator dynamic model by inputting the crowd force. The results indicate that the simulation and calculation of crowd force can provide the reliable basis for working device and hydraulic system design.

 

Key words: large faceshovel hydraulic excavator; discrete element method (DEM); crowd force