论文部分内容阅读
为提高矿山采空区气力充填效率,对以粉煤灰为填充材料的气力填充发送罐进行研究。发送罐作为气力填充系统的核心装置,其结构参数直接影响填充性能。基于流动场协同的减阻理论,对上引式发送罐的几何尺寸和关键结构进行优化设计,并使用欧拉双流体模型分析其对出料特性的影响。结果表明:出料管增设吸嘴有助于提高协同角和出料量,在吸嘴尺寸R/r为1.2左右时达到出料峰值;出料管吸嘴与入口的距离和发送罐半顶角对出料影响的变化趋势一致,呈先增大后减小,分别在距离h=55mm和θ′=18°时达到出料峰值;发送罐结构优化后,提高了出料量的20%。针对输送出现的问题,可进行相应的结构参数优化,提高设备性能。
In order to improve the gas filling efficiency in the goaf, the pneumatically filled sending tank with fly ash as filling material was studied. Sending tank as the core device of pneumatic filling system, the structural parameters directly affect the filling performance. Based on the synergetic drag reduction theory of flow field, the geometrical dimensions and key structures of the top-drawer are optimized. The Euler double-fluid model is used to analyze the influence on the output characteristics. The results show that the additional nozzles in the discharge tube can help to increase the synergistic angle and discharge volume. When the nozzle size R / r is about 1.2, the discharge peak is reached. The distance between the suction nozzle and the inlet of the discharge tube and the half The influence of the angle on the discharge was the same, first increased and then decreased, reaching the peak value at the distances of h = 55mm and θ ’= 18 ° respectively. After the optimization of the sending tank structure, the output of the sending tank increased by 20% . For delivery problems, the appropriate structural parameters can be optimized to improve equipment performance.