基于极限挖掘力的组合挖掘性能分析

Performance Analysis of Synthesis Digging Based on the Extreme Digging Force

以某国产100 t大型液压挖掘机为研究对象,采用极限挖掘力模型,对更加符合实际挖掘情况的组合挖掘进行性能分析。先选用考虑阻力矩的极限挖掘力模型,即挖掘力不仅由切向力和法向力组成,还考虑了阻力矩,更加符合真实挖掘情况。其次采用组合挖掘,即由铲斗挖掘和斗杆挖掘相互配合完成一次挖掘,更符合实际挖掘轨迹。最后通过挖掘力结果对挖掘机进行性能分析,此方法对大型液压挖掘机的设计与研究具有一定的借鉴意义。

Taking the working device of a domestic 100T large hydraulic excavator as the research object,the extreme digging force model is used to analyze the performance of the synthesis digging which is more in line with the actual digging situation.First of all,model of the extreme digging force considering the resistance moment is chosen,that is,the digging force is not only composed of tangential force and normal force,but also considering the existence of resistance moment,which is more in line with the actual situation.Secondly,the synthesis digging is adopted,that is,the bucket digging and the stick digging are combined to complete a dig,which is more in line with the actual digging track of the excavator.Finally,performance of the excavator is analyzed by calculation results of the digging force.This method has certain significance for the design and research of the large hydraulic excavator.