基于螺旋理论的大型矿用电铲构型综合研究

Configuration synthesis of large mining shovel based on screw theory

在大型矿用电铲的结构创新设计方面目前还没有较为系统的方法,同时在矿用电铲的构型综合方面也未见相关报道,针对这一问题,采用基于螺旋理论的约束综合法,对大型矿用电铲构型综合问题进行了研究。首先,根据螺旋理论对电铲推压和提升机构模型进行了自由度分析和计算,求出了电铲构型综合期望的运动;其次,采用基于螺旋理论的约束综合法,运用2种构型方案对矿用电铲进行了构型综合,通过优化筛选了支链结构,获得了100种三支链的电铲构型I和14种两支链的电铲构型Ⅱ;最后,通过SolidWorks软件建立了电铲三维模型,运用ADAMS软件对电铲的简化模型及综合出的一种新构型进行了挖掘轨迹仿真分析。研究结果表明:电铲新构型的运动仿真轨迹和理论挖掘轨迹基本吻合,证实了该构型方法的可行性,为多样化矿用电铲的结构创新设计提供了更多可选构型。

At present,there was no systematic method for the structural innovation design of large mining shovel,and there was no relevant report on the configuration synthesis of mining shovel.Aiming at the problem,the constraint synthesis method based on screw theory was used to study the configuration synthesis of large mining shovel.First of all,according to the screw theory,the degree of freedom of the pushing and lifting mechanism model of the mining shovel was analyzed and calculated,and the comprehensive desired motion of the electric shovel configuration was obtained.Secondly,using the constraint synthesis method based on screw theory,two configuration schemes were used to synthesize the configuration of the mining shovel,and through the optimization and screening of the branched chain structure,100 three-chain electric shovel configuration I and 14 two-branch electric shovel configurationⅡwere obtained.Finally,the three-dimensional model was established by the modeling software SolidWorks,and ADAMS software was used to simulate and analyze the excavation trajectory of the simplified model of large mining shovel and a new synthesized configuration.The research results show that the motion simulation trajectory of the new configuration of the electric shovel is basically consistent with the theoretical excavation trajectory,which verifies the feasibility of the configuration method and provides more optional configurations for the structural innovation design of diversified mining electric shovels.