刨煤机刨刀三向力实验测试及理论公式修正

Experimental Measurements of Triaxial Forces Acting on Plow Bits and Correction to Theoretical Formula

为了研究刨煤机工作状态下刨刀载荷特性,根据刨煤机破煤理论,建立了刨煤机力学检测平台,研制了刨刀三向测力系统。以BH38/2×400型刨煤机作为研究载体,对刨煤机刨削煤岩进行了实验测试,得到了不同刨深、不同刨速条件下的刨刀三向力测试结果,并将实验结果与理论计算结果进行了对比分析。研究结果表明:不同刨深条件下,实验所测得的三向力均值比理论计算值小,且三向力的实验值与理论计算比值在一定系数附近波动;不同刨速条件下,实验测得的三向力均值与理论计算值存在差异,且三向力实验值与理论计算比值呈一定倍数。

To study the load characteristics of plow bits under operational conditions, an experimental platform for studying mechanical testing of a coal plow and a system for measuring the triaxial forces acting on the plow bits were developed based on the theory of coal cutting by coal plows. Experimental measurements were performed during the coal cutting process of a BH38/2×400 coal plow. The triaxial forces acting on the cutting bits at different cutting depths and speeds were obtained, and the experimental results were compared with theoretical calculations. The results show that the measured triaxial forces were consistently lower than the corresponding theoretical values for various cutting depths. In addition, the ratios of the experimental values to the theoretical values of the triaxial forces were found to fluctuate at certain values. For different cutting speeds, the experimental values of the triaxial forces deviated from the theoretical values and they were related by certain multiplicative factors.