不同工况下采煤机截齿截割阻力实验研究

发布时间：2018-12-13 13:06

【摘要】：针对采煤机在不同工况下的截齿截割阻力的变化特性及斜切进刀工况下事故频发的状况,该文设计了由贴应变片插入式测量截齿和无线信号采集模块等组成的截齿截割阻力在线实验方案。将该方案用于MG400/930-WD型采煤机,在某大型采掘装备研究中心进行截割实验,得到了不同工况下采煤机截割阻力的变化曲线。分析实验结果可知,各截齿截割阻力在斜切进刀和正常工况下均为"间歇周期"变化,在单个周期内截割阻力先增大后减小,且增大和减少过程中呈波动变化;截割阻力在斜切进刀工况下先增大后减小,正常工况下较为稳定;在斜切进刀工况下,各截齿最大截割阻力数值及其出现的位置均不同,越晚参与截割的截齿出现最大截割阻力的位置越靠后,数值也越小,最大相差0.4 k N;斜切进刀工况下各截齿开始参与截割时,采煤机位置差异较大,最早与最晚位置相差约11.0 m;斜切进刀工况下的最大截割阻力达到6k N,约为正常工况下的6倍。该文实验方案可为采煤机斜切进刀工况下事故频发原因分析和截割部设计提供实验依据。
[Abstract]:In view of the variation characteristics of cutting resistance of shearer under different working conditions and the condition of frequent accidents under the condition of oblique cutting, In this paper, an on-line experimental scheme of tooth cutting resistance is designed, which consists of strain gage insertion measurement module and wireless signal acquisition module. This scheme is applied to MG400/930-WD shearer, and the cutting resistance curve of shearer under different working conditions is obtained by cutting experiment in a large mining equipment research center. The experimental results show that the cutting resistance of each cutter is "intermittent period" under the oblique cutting cutter and the normal working conditions, the cutting resistance increases first and then decreases in a single period, and fluctuates in the process of increasing and decreasing. The cutting resistance increases first and then decreases under the oblique feed condition, and is more stable under normal working condition. Under the condition of oblique cutting, the maximum cutting resistance and its position are different. The later the position of cutting resistance appears, the smaller the value is, and the greater the difference is 0.4 KN; When each cutter begins to participate in cutting, the position of shearer is very different, which is about 11.0 m from the last position, and the maximum cutting resistance under the condition of oblique feed is 6K N, which is about 6 times as high as that under normal working condition. The experimental scheme can provide experimental basis for the cause analysis of frequent accidents and the design of cutting part under the condition of inclined cutting cutter of shearer.
【作者单位】：宿州学院机械与电子工程学院;辽宁工程技术大学机械工程学院;
【基金】：国家能源研发(实验)中心重大项目(2015_215) 国家自然科学基金(51304107) 辽宁省教育厅创新团队资助项目(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)
【分类号】：TD421.6

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