15 T挖掘机机械臂的改进设计及强度分析

Improvement design and performance analysis on manipulator of 15 T excavator

两节臂挖掘机的挖掘范围有限,难以适应于挖掘范围广的工况。为扩大挖掘机的挖掘范围,提高其作业性能,将15 T挖掘机的动臂拆解成两节式动臂,和铲斗组成三节机械臂。对三节机械臂建立其动力学模型,并进行有限元分析。仿真结果表明,三节臂挖掘机的挖掘范围远大于15 T两节臂挖掘机的挖掘范围,且优化后的机械臂满足强度要求。

Due to limited excavation scope of the excavator with two-section manipulator,it is hard to adapt to the broad excavation scope operation.In order to improve the excavation scope and the operation performance of excavators,the moving arm of a 15 T excavator was reconstructed to a two-section manipulator,which combined with the bucket to form a three-section manipulator.The dynamic model of the three-section manipulator was built and the finite element analysis was conducted.The simulation results showed the excavation scope of the exactor with three-section manipulator was much larger than that of 15 T excavator with two-section manipulator,and the optimized manipulator satisfied the strength requirements.