不同螺旋线数纵向截割头截割性能的比较分析  

Comparison and analysis of cutting performance of longitudinal cutting heads with various numbers of helical lines

作　　者：张倩倩[1] 韩振南[1] 刘炜煌[1] 

机构地区：[1]太原理工大学机械工程学院,山西太原030024

出　　处：《矿山机械》2013年第5期12-16,共5页Mining & Processing Equipment

基　　金：山西省煤矿装备研究生创新中心项目(MKY2011-004)

摘　　要：为了评价不同螺旋线数纵轴式截割头的截割性能,在截割头形体尺寸、总截齿数、截齿及齿座型号完全相同的情况下,建立了按2条螺旋线排列的截割头(2LC型)和按3条螺旋线排列的截割头(3LC型)模型,通过编制程序进行模拟,并从切屑块度、受载大小及同时参与截割的有效截齿数变动量3个方面进行分析对比。由模拟图及相应的计算结果可知,3LC型截割头的平均切屑面积较2LC型的平均切屑面积大0.52%,且2LC型截割头球面段的截齿剥落下来的岩石崩落效果不佳,易产生粉尘。与2LC型截割头相比,3LC型截割头的载荷变差系数及有效截齿变差系数均较小,因此其载荷稳定性好。分析得出的结论为截割头截齿排列的优化设计奠定了一定的理论基础。In order to evaluate the cutting performance of the longitudinal cutting heads with various numbers of helical lines, on the premise of the cutting heads possessing the same dimensions, the same total number of picks, the same type of the pick and toothholder, the models of the cutting head with two helical lines （2LC typed） and three helical lines （3LC typed） were established. After simulation by programming, the models were compared from chip size, loading size and the number of effective picks operating simultaneously. The results showed that the average chip area of the 3LC typed cutting head was 0.52% larger than that of the 2LC typed, and the rock falling from the picks on the section of spherical surface of the 2LC typed cutting head was not satisfied, being easy to produce dust. Compared with the 2LC typed cutting head, the 3LC typed cutting head possessed the smaller load coefficient of variation, and the pick＇s effective coefficient of variation was less also, which led to better load stability. The research offered some theoretical basis for optimization design of the pick arrangement.

关 键 词：纵轴式掘进机 截割头 截齿排布 螺旋线数 截割性能 

分 类 号：TD421.5[矿业工程—矿山机电]