摘要
为了得到不同工况下采煤机各个滑靴的受力状态及其运动特性,在考虑仰俯角和煤层倾角的条件下,建立了采煤机整机力学模型。采用Krylov子空间方法的拟极小剩余法,解算出不同工况下各滑靴受力的最佳逼近值,分析随着煤层倾角和仰俯角的变化采煤机各滑靴受力的变化规律。结果表明:行走轮前一轮齿退出啮合、后一轮齿进入啮合时与销齿啮合区由圆弧段过渡到斜线段时,加速度值会出现两次突变;后导向滑靴受正压力较大,煤层倾角对各滑靴的受力状态影响相对较小。该研究为采煤机整机力学特性的分析提供了参考。
This paper is concerned with a better insight into the stress state of shearer and the motion characteristics of shearer under different working conditions; and the development of the mechanics model of shearer,along with the consideration of the conditions of the elevation angle and the inclination of coal seam. The research involves using Krylov subspace method of quasi minimal residual method,calculating the optimal approximation of slippers under force values due to different conditions,and delving into the mechanism by which the slippers are subjected to varying forces,depending on the variation of coal seam angle and pitch angle of the machine. Results show that there occur two sudden changes in the acceleration value when the engagement area of the pin tooth moves from the arc section to the oblique line segment,the front of the running gear is engaged with the gear wheel,and the rear gear tooth enters the engagement time. Rear guide sliding boots are subjected to a greater positive pressure and coal seam dip angle has a relatively small effect on the stress state of each shoe. This study might provide a reference for the analysis of mechanical properties of coal mining machines.
作者
刘春生
李孝宇
Liu Chunsheng Li Xiaoyu(Heilongjiang University Science ＆ Technology, Harbin 150022, China School of Mechanical Engineering, Heilongjiang University of Science ＆ Technology, Harbin 150022, China)
出处
《黑龙江科技大学学报》
CAS
2016年第5期552-557,590,共7页
Journal of Heilongjiang University of Science And Technology
基金
国家自然科学基金项目(51274091)
黑龙江省教育厅科学技术研究项目(12531006)
关键词
采煤机
整机力学模型
拟极小剩余法
惯性力
coal winning machine
force of the whole machine
quasi-minimal residual method
inertial force
