采煤机截齿分布与载荷谱关系的实验研究

发布时间：2018-11-13 15:49

【摘要】：为了研究斜切工况下采煤机滚筒截齿分布对载荷谱的影响规律,进而对截齿设计提供参考依据,采用等效截齿测试齿座对滚筒同一螺旋叶片不同截线上截齿载荷进行实时在线监测,同步存储后导出分析。实验结果表明:系统技术可靠、性能稳定,能够实时动态检测截齿截割力的变化,通过不同截线上截齿时间-截割力变化曲线可得:截割力曲线波动规律具有相似性,滚筒斜切截割煤岩时,截齿载荷整体曲线呈现波峰与波谷交替形式,反应截齿随截深变化截割力不断改变的过程;同一截齿的截割阻力大于其进给阻力,但其波动状态相似,都出现许多不规则波动;单个截齿上的截割阻力和牵引阻力的瞬时值服从对称性较好的Gamma分布,其分布参数随截齿所在截线与端盘距离呈一次傅里叶级数关系,为研究截齿载荷谱规律提供了一种新方法。
[Abstract]:In order to study the influence of cutter profile on load spectrum under oblique cutting condition, the paper provides a reference for the design of cutter. The load on different cutting lines of the same helical blade of the drum is monitored in real time and on-line by using the equivalent cutter test seat, and the analysis is derived after synchronous storage. The experimental results show that the system is reliable in technology and stable in performance, and can dynamically detect the change of cutting force in real time. The variation curve of cutting force on different cutting lines can be obtained: the fluctuation law of cutting force curve is similar. The integral curve of the cutting load presents the alternating form of wave peak and trough, and the cutting force changes continuously with the change of cutting depth. The cutting resistance of the same tooth is larger than its feed resistance, but its fluctuation state is similar, and there are many irregular fluctuations. The instantaneous value of cutting resistance and traction resistance on a single tooth follows the Gamma distribution with good symmetry, and the distribution parameters show a Fourier series relationship with the distance between the truncation line and the end disk. A new method is provided for studying the law of load spectrum.
【作者单位】：辽宁工程技术大学机械工程学院;辽宁工程技术大学研究生学院;中国煤矿机械装备有限责任公司;
【基金】：国家973计划课题(2014CB046301) 国家自然科学基金(51404135) 国家能源采掘装备研发实验中心项目([2010]1961号) 中煤集团重点科技项目(13-8)资助~~
【分类号】：TD421.6

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