低螺旋钻杆排渣流阻分析及减阻方法研究  

Study on slagging flow resistance of low spiral drill rod and the resistance reducing solution

作　　者：王坤[1] 郭文亮[1,2,3] 刘润爱 冯光[1,3] 欧恒安 WANG Kun1, GUO Wen-liang1,2,3, LIU Run-ai1,3, FENG Guang1,3, OU Heng-an1,2,3(1. College of Mechanical Engineering, Taiyuan University of Technology, Taiyuan 030024, China; 2. Mine Fluid Control Engineering Research Center of Shanxi Province, Taiyuan 030024, China; 3. Shanxi Key Laboratory of Precision Machining, Taiyuan 030024, Chin)

机构地区：[1]太原理工大学机械工程学院,山西太原030024 [2]山西省矿山流体控制工程技术研究中心,山西太原030024 [3]精密加工山西省重点实验室,山西太原030024

出　　处：《煤炭工程》2018年第5期111-113,共3页Coal Engineering

基　　金：山西省回国留学人员科研资助项目(2013-040);山西省重点研发计划(国际合作)项目(201603D421016)

摘　　要：为提高松软煤层钻孔气力排渣,改善钻孔施工工艺,基于两相流的相关理论对松软突出煤层低螺旋钻杆气力排渣钻进工艺进行了研究。具体进行了气力排渣流阻分析、钻杆腔体内部流阻计算和环形排渣空间流阻分析。通过分析和讨论影响流阻的因素,得出在钻进过程中流动阻力越大,压力损耗越大的结论,提出了降"内阻"和减"外阻"的方法。分析计算表明:增大钻杆接头内孔直径、减小接头处变径角和优化螺旋叶片的结构参数,可有效降低流阻,为低螺旋钻杆的设计生产提供参考依据。In order to improve the pneumatic slag discharge in soft coal seams and improve the drilling process, the drilling technology of pneumatic conveying slagging was theoretically research in soft and outburst coal seam based on the two phase flow principle. The bigger the resistance to flow is,the more pressure losses,so it is very necessary to reduce flow resistance. The influencing factors of flow resistance are analyzed and discussed,and the solutions are put forward with reducing internal resistance and decreasing external resistance. The calculation and analysis indicates that,the flow resistance is greatly reduced with increased bore diameter of drill pipe joint,reduced steep angle of joint and optimized structure parameters of helical blades.

关 键 词：气力排渣 低螺旋钻杆 压力损耗 减阻 流体动力学 

分 类 号：TD421.25[矿业工程—矿山机电]