滚筒逆转装煤过程的颗粒运动行为研究  

Research on the Particle Movement Behavior in Coaling Process of Drum Reversion

作　　者：徐婵[1,2] 王义亮[1,2] 杨兆建[1,2] 贾嘉[1,2] 

机构地区：[1]太原理工大学机械工程学院,山西太原030024 [2]煤矿综采装备山西省重点实验室,山西太原030024

出　　处：《矿业研究与开发》2017年第5期104-108,共5页Mining Research and Development

基　　金：山西省煤基重点科技攻关项目(MJ2014-05-02);山西省科技重大专项项目(20111101040)

摘　　要：针对薄煤层采煤机滚筒装煤效率低的问题,以某型号薄煤层采煤机为研究对象,以叶片螺旋升角、滚筒转速、牵引速度为主要设计变量,采用离散元研究方法对采煤机滚筒的逆转装煤过程进行分析。利用三维离散元软件PFC,建立滚筒、煤壁、刮板输送机中部槽联合仿真模型,仿真过程中统计滚筒装煤效率以及滚筒叶片包络范围内颗粒速度、颗粒数。结果表明:该型号采煤机滚筒宜采用叶片螺旋升角21°,在牵引速度1.5 m/min,转速45r/min或牵引速度2m/min,转速50r/min时,均能获得较高的装煤效率;叶片包络范围内颗粒三个方向的速度随着滚筒转速的增大而增大,且Y方向速度的增大幅度小于转速的增大幅度,X、Z方向速度的增大幅度大于转速的增大幅度。Aiming at the poor coaling efficiency of drum in coal cutter for thin coal seam, a coal cutter was taken as the research object. Taking the blade helix angle, the rotational speed of drum and the hauling speed as the main design variables, the coaling process of drum reversion was analyzed by discrete element research method. The combined simulation model composed of drum, coal wall and chute of scraper conveyor was established by three-dimensional discrete element software PFC. During the simulation, the coaling efficiency of drum was counted, as well as the particle velocity and number in the range of drum blade envelop. The results showed that the drum of this coal cutter should adopt the blade helix angle of 21°, which could obtain higher coaling efficiency under the hauling speed of 1.5 m/min and rotational speed of 45 r/min or the hauling speed of 2 m/min and rotational speed of 50 r/min. The velocities of particles in the range of drum blade envelop in three directions increased with the increase of rotational speed. But comparing with the increase degree of rotational speed, the increase degree of velocity in Y direction was less, and the increase degrees of velocity in X and Z direction were greater.

关 键 词：采煤机 滚筒 逆转 装煤效率 颗粒速度 离散元 

分 类 号：TD421.61[矿业工程—矿山机电]