南京理工大学学报（自然科学版）2017，Vol.41Issue(2)：159-164,6.DOI:10.14177/j.cnki.32-1397n.2017.41.02.004
不同工况下采煤机截齿截割阻力实验研究
Experimental study of cutting resistance of cutting teethunder different condition of shearer
摘要
Abstract
Aiming at properties of the cutting resistance under different conditions of shearers and frequent accidents under the oblique cutting feed condition,the on line experimental program consisting of the strain gauge plug-in measuring cutting teeth and the wireless strain acquisition module is designed.The program is applied to the type MG400/930-WD shearer under different conditions in a large mining equipment research center and the experimental curves of cutting resistance are obtained.Analysis of the experimental curves show that the cutting resistance is in intermittently periodical change and fluctuates in every period under both the oblique cutting feed condition and the normal condition.Within a single period,the cutting resistance first increases and then decreases and fluctuates.Under the oblique cutting feed condition,the cutting resistance firstly increases and then decreases,and it is relatively stable at the normal condition.Under the oblique cutting feed condition,the maximum cutting resistance of every tooth has different values and positions.The later the cutting of shearers starts,the later the position of the maximum cutting resistance occurs,the smaller the value is,and the biggest difference of the maximum cutting resistance reaches 0.4 kN.Under the oblique cutting feed condition,every tooth has different starting positions and the maximum difference of starting positions is 11.0 m;the maximum cutting resistance is 6 kN,six times of that at the normal condition.All the results show that the experimental scheme is feasible,it can provide experimental data for the reason analysis of accidents under the oblique cutting feed condition and the designing of the cutting tooth and the shearer cutting unit.关键词
采煤机/截割阻力/实验/斜切进刀Key words
shearers/cutting resistance/experimental study/oblique cutting feed condition分类
矿业与冶金引用本文复制引用
李强,毛君,张明玉..不同工况下采煤机截齿截割阻力实验研究[J].南京理工大学学报（自然科学版）,2017,41(2):159-164,6.基金项目
国家能源研发(实验)中心重大项目(2015_215) （实验）
国家自然科学基金(51304107) （51304107）
辽宁省教育厅创新团队资助项目(LT2013009) （LT2013009）
辽宁省煤矿液压技术与装备工程研究中心开放基金(CMHT-201206) （CMHT-201206）
