刨煤机刨刀及牵引块的强度分析
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摘要
为研究刨削过程中刨刀和牵引块的强度,基于刨刀及刨链的力学模型,结合煤层赋存条件,对刨煤机顶、底刀以及刨链的受力进行了计算。利用多软件建立刨煤机多体模型,通过对其顶、底刀以及牵引块进行动态仿真,得到了刨刀和牵引块的应力分布,其中刨刀与刀座拐角联接位置、牵引块底部矩形楔孔位置受力较大。根据仿真结果对刨刀和牵引块进行局部结构改进,改进后刨刀和牵引块的受力得到较大的改善。
In order to study the strength of plow bit and traction block in the cutting process, the force of the plow bit and the plow chain were calculated according to the mechanical model, combined with coal seam conditions. Multibody model of coal plow was established by using multi software.The stress distribution of plow bit and traction block were obtained according the dynamic simulation, the stress at the connecting point of the plow bit with its holder and the bottom position of traction block rectangular wedge hole were stronger than other positions. According to the simulation result, the partial structural improvement of the plow bit and traction block has been carried out,and the stress state of the plow bit and traction block have been greatly improved.
In order to study the strength of plow bit and traction block in the cutting process, the force of the plow bit and the plow chain were calculated according to the mechanical model, combined with coal seam conditions. Multibody model of coal plow was established by using multi software.The stress distribution of plow bit and traction block were obtained according the dynamic simulation, the stress at the connecting point of the plow bit with its holder and the bottom position of traction block rectangular wedge hole were stronger than other positions. According to the simulation result, the partial structural improvement of the plow bit and traction block has been carried out,and the stress state of the plow bit and traction block have been greatly improved.
引文
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[2]李晓豁,刘霞,焦丽,等.不同工况下滑行式刨煤机的动态仿真研究[J].煤炭学报,2010,35(7):1 202-1 206.
[3]赵丽娟,田震,张建军,等.刨煤机随机载荷的模拟分析及其应用[J].机械设计, 2016,33(10):55-61.
[4]毛君,张瑜,宋秋爽,等.斜切工况下刨煤机动态特性研究及运行参数优化设计[J].机械强度, 2017,39(3):500-504.
[5]张建军,田震,宋振铎.刨煤机刨链受力分析与仿真[J].煤矿机械, 2016, 37(1):98-100.
[6]康晓敏,李贵轩.随机动载荷作用下刨煤机刨链疲劳寿命预测[J].煤炭学报,2010,35(3):503-508.
[7]郝志勇,毛君.基于LS-DYNA刨刀刨削煤岩的模拟研究[J].微计算机信息,2011,27(9):25-26.
[8]刘伟.刨刀刨削煤壁仿真及有限元分析[D].阜新:辽宁工程技术大学, 2012.
[9]赵丽娟,田震,张建军,等.协同仿真技术在薄煤层采煤机械动态可靠性分析中的应用[J].机械设计,2016,33(8):72-78.
[10]穆润青,宋振铎,袁智,等.矿用圆环链数学建模和仿真分析[J].煤矿机械,2017,38(8):160-161.