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中南大学学报(自然科学版)

Journal of Central South University

第48卷    第3期    总第271期    2017年3月

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文章编号:1672-7207(2017)03-0675-09
螺旋钻采煤机犁煤板的结构及参数分析
付林,杜长龙,李建平,杨道龙

(中国矿业大学 机电工程学院,江苏 徐州,221116)

摘 要: 为了提高螺旋钻采煤机犁煤板的收煤率,降低其能耗,提出3种结构形式的犁煤板,建立犁煤板物料回收离散元模型,利用该模型分别对不同形式犁煤板的结构参数进行仿真分析。研究结果表明:螺旋形犁煤板的收料比能耗和收煤率均随螺旋导程的增大而减小;圆弧形犁煤板的收煤率大体上随倾斜角的增大而减小,随圆弧半径的增大而增大;其收料比能耗大体上随倾斜角的增大先减小而后增大,随圆弧半径的变化无显著规律性;当倾斜角为40°左右,圆弧半径为300 mm左右时,犁煤板的收料比能耗较小;平面形犁煤板的收煤率大体上随铲角和倾角的增大而减小;收料比能耗大体上随铲角的增大而增大,随倾角的增大而减小;在研究的结构参数范围内,当铲角和倾角同时在30°左右取值时,犁煤板的比能耗较小;在3种结构形式的犁煤板中,倾角和铲角均为0°的平面形犁煤板能获得的收煤率最高。

 

关键字: 螺旋钻采煤机;犁煤板;离散元模型;收煤率;收料比能耗;结构参数

Structure and parameter analysis of auger miner’s coal plough
FU Lin, DU Changlong, LI Jianping, YANG Daolong

School of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou 221116, China

Abstract:In order to improve the coal recovery ratio and reduce energy consumption, three types of coal ploughs were presented and their structure parameters were studied respectively using the discrete element method (DEM). The results show that the recovery specific energy and coal recovery ratio of the spiral coal plough decrease with the increase of screw lead. For the circular coal plough, its coal recovery ratio decreases generally with the increase of tilt angle and the decrease of the arc radius, and its recovery specific energy decreases firstly and then increases with the increase of the tilt angle. The smaller recovery specific energy of the circular coal plough can be achieved when the tilt angle is chosen at around 40° and the arc radius is around 300 mm. For the plane coal plough, its coal recovery ratio decreases generally with the increase of pushing angle and tilt angle, and its recovery specific energy increases generally with the increase of pushing angle and the decrease of tilt angle. Within the scope of the selected parameters, the minimum specific energy of the plane coal plough can be achieved when the pushing angle and tilt angle are chosen at around 30° at the same time. In the three coal ploughs, the plane coal plough with 0° pushing angle and 0° tilt angle has the highest coal recovery ratio.

 

Key words: auger miner; coal plough; the discrete element method (DEM); coal recovery ratio; recovery specific energy; structure parameters

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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