海底多金属硫化物采掘机构滚筒切削特性研究

Cutting Performance of Drum Cutter in Mining Mechanism for Seabed Polymetallic Sulphide

为提高采掘机构滚筒的工作性能,采用离散单元法对不同工况下滚筒的切削过程进行了数值模拟。采用单因素分析法和正交试验法分析了切削厚度、转速、牵引速度对切削阻力、产能及比能耗的影响,以滚筒的切削阻力和比能耗为评价指标,利用矩阵分析法获得了最佳的滚筒工作参数。结果表明,随着切削厚度增加,切削阻力和产能均增大,比能耗减小;随着转速增加,切削阻力和产能均减小,比能耗增大;随着牵引速度增加,切削阻力、产能均增大,比能耗减小。滚筒最佳工作参数为:切削厚度50 mm、转速100 r/min、牵引速度0.06 m/s。

In order to improve the working performance of drum cutter in mining mechanism,the cutting process of drum cutter under different working conditions was numerically simulated by using discrete element method(DEM).The effects of cutting thickness,rotating speed and tractor speed on cutting resistance,productivity and specific energy consumption were investigated by single-factor analysis and orthogonal testing.With cutting resistance and specific energy consumption of the drum cutter as evaluation indexes,the best working parameters of the drum cutter were obtained by matrix analysis.The results show that as cutting thickness increases,both cutting resistance and productivity increase,while specific energy consumption decreases.With rotation speed increases,cutting resistance and productivity decrease,but specific energy consumption increases.And with tractor speed increases,both cutting resistance and productivity increase,while specific energy consumption decreases.It is concluded that the optimum working parameters of drum cutter are as follows:cutting thickness of 50 mm,rotation speed of 100 r/min,and tractor speed of 0.06 m/s.