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Particle size distribution of coal and gangue after impact-crush separation 被引量:4
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作者 yang dao-long LI Jian-ping +2 位作者 DU Chang-long ZHENG Ke-hong LIU Song-yong 《Journal of Central South University》 SCIE EI CAS CSCD 2017年第6期1252-1262,共11页
Based on the separation and backfilling system of coal and gangue, the mineral material impact experiments were conducted utilizing the hardness difference between coal and gangue according to the uniaxial compression... Based on the separation and backfilling system of coal and gangue, the mineral material impact experiments were conducted utilizing the hardness difference between coal and gangue according to the uniaxial compression experiments. The broken coal and gangue particles were collected and screened by different size meshes. The particle size distributions of coal and gangue under different impact velocities were researched according to the Rosin-Rammler distribution. The relationships between separation indicators and impact velocities were discussed. It is found from experiments that there is a fully broken boundary of coal material. The experimental results indicate that the Rosin-Rammler distribution could accurately describe the particle size distribution of broken coal and gangue under different impact velocities, and there is a minimum overlap region when the impact velocity is 12.10 m/s which leads to the minimum mixed degree of coal and gangue, and consequently the benefit of coal and gangue separation. 展开更多
关键词 Rosin-Rammler distribution impact CRUSH SEPARATION indicator COAL and GANGUE SEPARATION and BACKFILLING system
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Analysis on vertical steering vibration of drum shearer cutting part 被引量:1
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作者 yang dao-long LI Jian-ping +1 位作者 WANG Yan-xiang JIANG Hong-xiang 《Journal of Central South University》 SCIE EI CAS CSCD 2018年第11期2722-2732,共11页
The impact of the load on the shearer is mainly transmitted through cutting part.In this paper,in order to get the vertical steering vibration characteristics of the cutting part of the drum shearer,the working condit... The impact of the load on the shearer is mainly transmitted through cutting part.In this paper,in order to get the vertical steering vibration characteristics of the cutting part of the drum shearer,the working condition of coal mining machine is simplified.A simplified vertical steering model and the simplified vibration model of the whole cutting part of shearer are established.The vertical steering vibration process of the cutting unit is simplified into a single freedom and one forced vibration system under harmonic excitation.The dynamic response of the cutting part under sine excitation is obtained by using Matlab/Simulink for modeling and simulation.The influence of the support rigidity and damping of the high oil cylinder on the vertical steering vibration characteristics of the cutting part is analyzed.The results show that the damping of the cylinder can reduce the vibration of the system and the stability of the swing process of cutting the part is improved. 展开更多
关键词 drum shearer shearer cutting part vertical steering vibration MATLAB/SIMULINK
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机械制图本科教学探讨 被引量:1
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作者 杨道龙 邢邦圣 +1 位作者 王繁生 王雁翔 《内燃机与配件》 2018年第21期219-220,共2页
为提高机械专业本科教学质量、增强机械专业本科毕业生绘图素养,本文提出"机械制图课程线"这一概念,将机械制图系列课程与绘图相关实践课程相互串联一起,辅以机械基础系列课程,将教学成果集中体现在本科毕业设计和论文的二维... 为提高机械专业本科教学质量、增强机械专业本科毕业生绘图素养,本文提出"机械制图课程线"这一概念,将机械制图系列课程与绘图相关实践课程相互串联一起,辅以机械基础系列课程,将教学成果集中体现在本科毕业设计和论文的二维图纸中,形成一条贯穿本科学习全生涯的课程线,以达到将机械制图系列课程"学以致用、用以促学、学用相长"的目的。 展开更多
关键词 机械制图 本科教学 课程线 画法几何 计算机绘图 三维建模
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