基于EDEM的环式给煤机卸煤特性分析  

Analysis on coal unloading process of a ring-type coal feeder based on EDEM

作　　者：马倩 韩建斌 马爱霞 周朝辉 MA Qian;HAN Jianbin;MA Aixia;ZHOU Chaohui(Huadian Zhengzhou Mechanical Design Institute Company Limited,Zhengzhou 450046,China)

机构地区：[1]华电郑州机械设计研究院有限公司,郑州450046

出　　处：《华电技术》2020年第12期49-53,共5页HUADIAN TECHNOLOGY

基　　金：中国华电集团科技项目(CHDKJ-2015-G18)。

摘　　要：为解决环式给煤机积煤、撒煤、出力不足等问题,利用离散元分析软件EDEM建立了环式给煤机卸煤过程的有限元模型,研究了卸煤角度、卸煤开口宽度及卸煤车运行速度等参数对卸煤板受力、密封罩受力及卸料出力的影响规律。结果表明:卸煤板角度为45°时,卸煤板受力最小,卸料出力最好;对于内环出力为900 t/h,外环出力为1300 t/h的双环环式给煤机,当内、外环卸煤开口宽度为1600 mm时,对内、外环卸煤板受力,密封罩受力及卸料出力的综合影响最小,开口宽度最合适;卸煤车运行速度的改变,并不能改变卸煤的最大出力,只能改变卸煤出力达到稳定状态的速度。通过对环式给煤机卸煤参数的研究,为实现环式给煤机的稳定运行奠定了基础。To solve the problems of coal accumulation,coal spattering and insufficient output in ring-type coal feeders,a finite element model for coal unloading process of a ring-type coal feeder was established by discrete element analysis software EDEM. It studied the effects of unloading angle,width of unloading opening and velocity of unloading vehicles on the force of unloading plate,the force of seal cover and the unloading capacity. According to the results,the force of unloading plate was the smallest and the unloading capacity was maximized with an unloading angle of 45°. As for the dualring coal feeder with an inner ring of a 900 t/h capacity and an outer ring of a 1 300 t/h capacity,the unloading openness width for the inner and outer rings exert the least influence on the force of the unloading plate and the seal cover,and the unloading capacity,when it is 1 600 mm.Thus,it is the most ideal width for unloading openness. The variation of unloading vehicle velocity can barely impact the maximum output. The research on unloading parameters of ring-type feeders laid a foundation for the feeders’ stable operation.

关 键 词：环式给煤机 离散元法 卸煤板角度 卸煤开口宽度 卸煤车运行速度 

分 类 号：TK223.24[动力工程及工程热物理—动力机械及工程]