雙頭高葉片螺旋鉆桿高轉(zhuǎn)速下排粉效率分析
[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.
【作者單位】: 煤炭科學(xué)研究總院;中煤科工集團(tuán)西安研究院有限公司;中國(guó)礦業(yè)大學(xué)機(jī)電工程學(xué)院;
【基金】:陜西省煤基重點(diǎn)科技攻關(guān)資助項(xiàng)目(Q2014-07)
【分類號(hào)】:TD712.6
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