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Chenxu LUO
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Influence of drum motion parameters on shearer cutting properties Chenxu LUO; Changlong DU; Songyong LIU
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 1: January 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

In order to study the influence of motionparameters of shearer drum on shearer cutting properties,an embedded system for cutting load test that can identify thecutting resistance indirectly were developed and put into test experimentunderground. The analysis results indicated that in the case of pullingspeed being constant, when pulling speed is small, the cuttingresistance nonlinearly declined and cutting specific energy consumption (CSEC)increases nonlinearly with the increase of the drum rotating speed; whenpulling speed is large, cutting resistance approximately linearly decreases andCSEC linearly increases with the increase of the drum rotating speed; in thecase of drum rotating speed being constant, the cutting resistance presentslinearly reducing form with pulling speed increasing its value in the range ofhigher speed and increases nonlinearly with pulling speed increasing its valuein the range of lower speed, and CSEC decreases nonlinearly with the increaseof the pulling speed. The consistency of the theoretical analysis and the testresults confirmed the reliability of the proposed embedded system whichprovides an effective way for the detection and analysis of mine shaft cuttingload and also provides the instruction for shearer speed-changing cutting coal. DOI : http://dx.doi.org/10.11591/telkomnika.v12i1.3191
Fractal and Chaos Characteristics in Rock Milled Process Xinxia CUI; Chenxu LUO
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 1: January 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

In order to research the mechanism and to reveal the natural characteristics in rock milled process, the milling load was deemed to be a component of the deterministic nonlinear dissipation system. The characteristic factor model of milling load was built on the basis of time delay method, and the phase-space of milling load was rebuilt. the dimensional phase-type of broken attractor was described. The results indicated that the broken attractor was a fractal set ,which acquired through the scale conversion of phase-space developed by each dimension. The relevant dimension of broken attractor can be as the identification to reflect the change of rock broken mechanism. And the Lyapunov exponential spectrum and the maximum Lyapunov exponent were acquired by confirming the system reconstruction dimension. The chaos phenomenon was existed in the rock milled process, which provides the basis for building the deterministic model of rock milled process. DOI : http://dx.doi.org/10.11591/telkomnika.v12i1.3448
Design front rake angle of PDC bit based on SolidWorks simulation method Xiaoming HAN; Chenxu LUO; Xingyu HAN
Indonesian Journal of Electrical Engineering and Computer Science Vol 1, No 3: March 2016
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v1.i3.pp627-634

Abstract

In order to solve the bit front rake angle parameter selection problem of under different coal rock, it is proposed in polycrystalline diamond compact no core bit as the research object, and established a bit compact two-dimensional stress model of cutting teeth. The result shows that the front rake angle is the factor of cutting force and the drilling efficiency. Application of SolidWorks simulation carries out the finite element simulation analysis respectively to different front rake angle of bit model under the condition of soft rock and hard rock. Form the simulation it concludes that under the condition of soft rock and hard rock, the optimal front rake angle is 10° and 15° respectively. It is obtained that the strength of the bit is largest and the life is longest on the best front rake angle of bit.
Co-Authors Changlong DU Songyong LIU Xiaoming HAN Xingyu HAN Xinxia CUI