在基于离散元素方法的螺旋鼓的外区域中对煤颗粒运动特征的数值模拟
Zhen Tian1,2, Shan Gao3, Lianwei Ma4
1College of Mechanical and Electrical Engineering, Zhoukou Normal University, Zhoukou, 466000, China. lntutian2008@126.com.
Scientific reports
|January 8, 2025
概括
这项研究模拟了螺旋式桶中的煤颗粒运动,发现更高的鼓旋转速度提高了煤炭装载效率. 引速度对粒子速度的影响最小,但降低了加载率.
科学领域:
- 机械工程 机械工程
- 采矿工程 采矿工程 采矿工程
- 计算科学 计算科学
背景情况:
- 了解装载过程中的煤颗粒动态对于优化采矿设备至关重要.
- 螺旋桶是用于煤炭开采和运输的剪刀装载机的关键部件.
- 之前的研究往往缺乏详细的模拟在鼓中的粒子级相互作用.
研究的目的:
- 在装载过程中,研究螺旋鼓内煤炭颗粒的运动特征.
- 建立一个离散元素模型来模拟煤炭颗粒的流动和分布.
- 为了确定操作参数 (引和鼓速度) 对煤炭装载效率的影响.
主要方法:
- 建立了螺旋鼓煤炭装载过程的离散元素模型.
- 校准材料参数使用煤样品特性和确定粘附参数.
- 模拟的煤炭颗粒分布和速度在空间划分的包裹区域的鼓.
主要成果:
- 煤颗粒数量在外径区域 (III和IV) 中最高,其中外向轴向运动占主导地位.
- 靠近外墙的颗粒显示出高流量潜力到刀输送机;向后弹射的概率增加了靠近端板.
- 提高鼓旋转速度显著提高了粒子速度,而引速度对速度的影响最小,但加载速度降低.
结论:
- 离散元素方法准确地模拟了螺旋鼓中的粒子运动,通过工业实验验证.
- 鼓旋转速度是提高煤炭装载效率的关键参数.
- 研究结果为优化剪刀机操作参数和提高螺旋鼓性能提供了宝贵的见解.
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