凿岩钻车捕尘罩结构改进及内部流场特性研究  

Structural improvement of dust shield of rock drill and research on characteristics of its inner flow field

作　　者：段焱辉 郭勇[1,2] 赵宏强[1,2] 周茂贤[1] 陈庆[1] 

机构地区：[1]中南大学高性能复杂制造国家重点实验室,湖南长沙410083 [2]湖南山河智能装备股份有限公司国家级企业技术中心,湖南长沙410100

出　　处：《矿山机械》2016年第5期13-17,共5页Mining & Processing Equipment

基　　金：国家自然科学基金资助项目(51375499)

摘　　要：为了确定凿岩钻车除尘系统最优参数匹配关系,提高除尘系统效率,对除尘系统关键部件捕尘罩进行研究。利用Inventor建立捕尘罩的三维模型,使用Gambit软件进行网格划分,基于RNG?-?方程的气相湍流模型,借助Fluent软件对原型和改进型捕尘罩内部流场进行了数值模拟分析,采用拉格朗日粒子追踪法描述固相,进行气固两相流运动仿真分析,并与实验观察结果进行对比,验证了仿真的准确性。结果表明:增加导流板和罩体卷边设计,大大提升了流场速度,改进了流场分布,吸尘效率提高了54%。当原型捕尘罩出口流量设为入口流量4倍,明显减少粉尘外泄所造成的二次污染,而改进型仅为3倍,且吸尘效果更好。In order to determine the optimal parameter matching relationship of the dust removal system in the rock drill and improve the efficiency of the dust removal system, dust shield, the key part of the dust removal system, was studied. The 3D model of the dust shield was built by Inventor and mesh division was carried out by Gambit. Based on the gas phase turbulent model of RNGk-｜？ equation, Fluent was applied to conduct numerical simulation and analysis on the inner flow field of original dust shield and the improved one. Lagrange particle tracking method was applied to describe the solid phase, and the simulation and analysis on gas-solid two phase flow motion were carried out. The contrast of simulation results and test ones verified the correctness of the simulation. The results showed： addition of the guide plate and the hood edge curl greatly enhanced the velocity of the flow field and improved the distribution of the flow field, and the dust removal efficiency increased by 54%; when the outlet flow of the original dust shield was set as four times of the inlet flow, the secondary pollution caused by dust leakage significantly reduced, while the outlet flow of the improved one was only three times of the inlet flow, and the dust removal efficiency was higher.

关 键 词：捕尘罩 参数匹配 气固两相流元 数值模拟 卷边 

分 类 号：TD714.4[矿业工程—矿井通风与安全] TD421.2