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针对大型液压挖掘机液压控制技术研究的不足,设计了大型正铲挖掘机液压系统控制方案,建立了大型正铲挖掘机的数学模型,对挖掘机的挖掘阻力进行了分析。采用ADAMS软件建立了挖掘机工作装置的仿真模型,利用AMESim软件建立了挖掘机液压控制系统的仿真模型,用这2种软件对动臂及斗杆液压缸在1个工作循环内的压力、速度及位移变化进行了联合仿真分析,并对液压挖掘机进行了试验研究。结果表明:所设计的液压控制系统可以满足动臂与斗杆复合动作时的压力及速度要求,验证了所提出的大型正铲挖掘机液压控制方案的正确性。
Aiming at the insufficiency of hydraulic control technology of large hydraulic excavator, the hydraulic control scheme of large front shovel excavator was designed. The mathematical model of large front shovel excavator was established and the excavation resistance of excavator was analyzed. The simulation model of excavator working device was established by using ADAMS software. The simulation model of excavator hydraulic control system was established by AMESim software. The pressure and speed of boom and stick cylinder in one working cycle And the displacement of the joint simulation analysis, and hydraulic excavators were studied. The results show that the designed hydraulic control system can meet the pressure and speed requirements when the boom and the stick move together, and verify the correctness of the hydraulic control scheme of the large front shovel excavator.