双头高叶片螺旋钻杆高转速下排粉效率分析
发布时间：2018-12-20 07:16
【摘要】：为了得到双头高叶片螺旋钻杆高转速下钻进时排粉效率影响因素和规律,运用离散元法对高速螺旋钻进时排粉运动规律进行了分析,使用EDEM软件分析了不同工况下排粉质量流、扭矩与转速关系。研究结果表明:煤粉靠钻具的给进挤压到螺旋槽中进行传输;给进速度一定时,当转速超过临界转速时质量流和扭矩不随回转速度变化而变化;停止给进排粉时,质量流随回转速度增大而呈正相关增大,扭矩随转速增大而指数式增加;塌孔排粉时,一定的塌孔流量下有其对应的临界转速,小于临界转速时质量流随转速增大而增大,大于临界转速后质量流趋于稳定。
[Abstract]:In order to obtain the influencing factors and rules of powder discharge efficiency when drilling high speed spiral drill pipe with double head and high blade, the movement law of powder discharge in high speed spiral drilling was analyzed by discrete element method, and the mass flow of powder discharge under different working conditions was analyzed by EDEM software. The relationship between torque and speed. The results show that the pulverized coal is extruded into the spiral groove by the feed of the drilling tool and the mass flow and torque do not change with the rotating speed when the speed of the feed is constant when the speed exceeds the critical speed. The mass flow increases positively with the increase of rotary speed, and the torque increases exponentially with the increase of rotational speed. The mass flow increases with the increase of the velocity when the critical speed is smaller than the critical speed, and the mass flow tends to be stable when the critical speed is larger than the critical speed.
【作者单位】： 煤炭科学研究总院;中煤科工集团西安研究院有限公司;中国矿业大学机电工程学院;
【基金】：陕西省煤基重点科技攻关资助项目(Q2014-07)
【分类号】：TD712.6
本文编号：2387635
[Abstract]:In order to obtain the influencing factors and rules of powder discharge efficiency when drilling high speed spiral drill pipe with double head and high blade, the movement law of powder discharge in high speed spiral drilling was analyzed by discrete element method, and the mass flow of powder discharge under different working conditions was analyzed by EDEM software. The relationship between torque and speed. The results show that the pulverized coal is extruded into the spiral groove by the feed of the drilling tool and the mass flow and torque do not change with the rotating speed when the speed of the feed is constant when the speed exceeds the critical speed. The mass flow increases positively with the increase of rotary speed, and the torque increases exponentially with the increase of rotational speed. The mass flow increases with the increase of the velocity when the critical speed is smaller than the critical speed, and the mass flow tends to be stable when the critical speed is larger than the critical speed.
【作者单位】： 煤炭科学研究总院;中煤科工集团西安研究院有限公司;中国矿业大学机电工程学院;
【基金】：陕西省煤基重点科技攻关资助项目(Q2014-07)
【分类号】：TD712.6
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