采煤机截齿截割阻力试验研究
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摘要
为研究采煤机工作状态下截齿截割阻力变化特性,设计了截齿截割阻力试验方案,并应用该试验方案,进行了斜切进刀工况和正常工况下的模拟截割试验,得到了截割阻力试验变化曲线。分析试验结果可知:在斜切进刀和正常工况下各截齿截割阻力均为间歇周期分段变化,且在单个周期内会出现波动;截割阻力在斜切进刀工况下整体上先增大后减小,但在正常工况下,整体较稳定;在斜切进刀工况和正常工况下,截齿截割阻力均会出现一些突变,斜切进刀工况下最大截割阻力可以达到6 700 N左右;在斜切进刀工况下,各截齿开始参与截割的位置差异性较大,最大相差约1.10×104mm;能为采煤机斜切进刀工况下事故频发的原因提供试验依据,为截割部的设计提供试验数据。
For research on cutting resistance under the shearer working state, the experimental program of shearer cutting resistance was designed, and then experiments about oblique cutting feed condition and normal condition were carried out with the experimental program, the experimental curve of cutting resistance was obtained, and then the experimental curve was analyzed. Result shows that the cutting resistance is intermittent period variety, and it fluctuates in every period both at oblique cutting feed condition and normal condition; The cutting resistance firstly increases and then decreases at oblique cutting feed condition, it is relatively stable at normal condition; There are some cutting resistance abrupt changes both at oblique cutting feed condition and normal condition, the maximum cutting resistance can reach about 6 700 N; Every cutting teeth has different starting positions at oblique cutting feed condition, the maximum disparity of starting positions has come to 1.10×104 mm;Research results can provide experimental data for reasons of the accidents at oblique cutting feed condition, and provide experimental data for designing cutting tooth and shearer cutting unit.
For research on cutting resistance under the shearer working state, the experimental program of shearer cutting resistance was designed, and then experiments about oblique cutting feed condition and normal condition were carried out with the experimental program, the experimental curve of cutting resistance was obtained, and then the experimental curve was analyzed. Result shows that the cutting resistance is intermittent period variety, and it fluctuates in every period both at oblique cutting feed condition and normal condition; The cutting resistance firstly increases and then decreases at oblique cutting feed condition, it is relatively stable at normal condition; There are some cutting resistance abrupt changes both at oblique cutting feed condition and normal condition, the maximum cutting resistance can reach about 6 700 N; Every cutting teeth has different starting positions at oblique cutting feed condition, the maximum disparity of starting positions has come to 1.10×104 mm;Research results can provide experimental data for reasons of the accidents at oblique cutting feed condition, and provide experimental data for designing cutting tooth and shearer cutting unit.
引文
[1]刘送永.采煤机滚筒截割性能及截割系统动力学研究[D].徐州:中国矿业大学,2009:57-58.
[2]刘春生.滚筒式采煤机理论设计基础[M].徐州:中国矿业大学出版社,2003:29-40.
[3]Tiryaki B.In situ studies on service life and pick consumption characteristics of shearerrums[J].Journal of the South African Institute of Mining and Metallurgy,2004,104(2):107-121.
[4]雷玉勇,李晓红,王建生,等.刀形截齿截割阻力的理论和试验研究[J].煤矿机械,1999(10):13-15.
[5]王洪英,刘春生.截齿截割阻力的实测方法及其结果分析[J].黑龙江科技学院学报,2007,17(2):105-107.
[6]刘春生,李德根.基于单齿截割试验条件的截割阻力数学模型[J].煤炭学报,2011,36(9):1565-1569.
[7]Hekimoglu O Z,Tiryaki B.Effects of drum vibration on performance of coal shearers[J].Transactions of the Institution of Mining and Metallurgy Section A-Mining Industry(S 1474-9009),1997,106:91-94.
[8]毛君,姜鹏,谢苗.斜切状态下滚筒采煤机液压拉杠力学分析与寿命研究[J].工程设计学报,2015,22(1):95-100.
[9]赵丽娟,田震,刘旭南,等.薄煤层采煤机滚筒载荷特性仿真分析[J].系统仿真学报,2015,27(12):3102-3108.
[10]张强,王海舰,吴泽光,等.滚筒式采煤机煤岩截割力学特性及测试系统研究[J].工程设计学报,2017,24(4):459-464.
[11]郝志勇,张佩,闫闯,等.采煤机端盘截齿载荷特性研究[J].机械强度,2017,39(2):360-366.
[12]李景林,于彬,仲崇军,等.斜切状态时的采煤机滚筒的载荷分析[J].煤矿机械,1998(6):1-3.
[13]李强,毛君,张明玉,等.采煤机截齿三向力测试方案设计及实验研究[J].工程设计学报,2016,23(5):506-512.
[14]李强.采煤机斜切进刀工况下力学特性及测试系统研究[D].阜新:辽宁工程技术大学,2014.
[15]李强,毛君,张明玉.不同工况下采煤机截齿截割阻力实验研究[J].南京理工大学学报,2017,41(2):159-164.
[16]高洪斌,杨兆建.滚筒采煤机负载的波动性分析[J].机械科学与技术,2013,32(7):1054-1059.
[17](苏)EЗ保晋,BЗ拉麦德,B B顿.采煤机破煤理论[M].王庆康,门迎春,译.北京:煤炭工业出版社,1992:70-92.
[18]Roxborough F F,Pedroncelli E J.Practical evaluation of some coal-cutting theories using a continuous miner[J].The Mining Engineer,1982,142(252):145-156.
[2]刘春生.滚筒式采煤机理论设计基础[M].徐州:中国矿业大学出版社,2003:29-40.
[3]Tiryaki B.In situ studies on service life and pick consumption characteristics of shearerrums[J].Journal of the South African Institute of Mining and Metallurgy,2004,104(2):107-121.
[4]雷玉勇,李晓红,王建生,等.刀形截齿截割阻力的理论和试验研究[J].煤矿机械,1999(10):13-15.
[5]王洪英,刘春生.截齿截割阻力的实测方法及其结果分析[J].黑龙江科技学院学报,2007,17(2):105-107.
[6]刘春生,李德根.基于单齿截割试验条件的截割阻力数学模型[J].煤炭学报,2011,36(9):1565-1569.
[7]Hekimoglu O Z,Tiryaki B.Effects of drum vibration on performance of coal shearers[J].Transactions of the Institution of Mining and Metallurgy Section A-Mining Industry(S 1474-9009),1997,106:91-94.
[8]毛君,姜鹏,谢苗.斜切状态下滚筒采煤机液压拉杠力学分析与寿命研究[J].工程设计学报,2015,22(1):95-100.
[9]赵丽娟,田震,刘旭南,等.薄煤层采煤机滚筒载荷特性仿真分析[J].系统仿真学报,2015,27(12):3102-3108.
[10]张强,王海舰,吴泽光,等.滚筒式采煤机煤岩截割力学特性及测试系统研究[J].工程设计学报,2017,24(4):459-464.
[11]郝志勇,张佩,闫闯,等.采煤机端盘截齿载荷特性研究[J].机械强度,2017,39(2):360-366.
[12]李景林,于彬,仲崇军,等.斜切状态时的采煤机滚筒的载荷分析[J].煤矿机械,1998(6):1-3.
[13]李强,毛君,张明玉,等.采煤机截齿三向力测试方案设计及实验研究[J].工程设计学报,2016,23(5):506-512.
[14]李强.采煤机斜切进刀工况下力学特性及测试系统研究[D].阜新:辽宁工程技术大学,2014.
[15]李强,毛君,张明玉.不同工况下采煤机截齿截割阻力实验研究[J].南京理工大学学报,2017,41(2):159-164.
[16]高洪斌,杨兆建.滚筒采煤机负载的波动性分析[J].机械科学与技术,2013,32(7):1054-1059.
[17](苏)EЗ保晋,BЗ拉麦德,B B顿.采煤机破煤理论[M].王庆康,门迎春,译.北京:煤炭工业出版社,1992:70-92.
[18]Roxborough F F,Pedroncelli E J.Practical evaluation of some coal-cutting theories using a continuous miner[J].The Mining Engineer,1982,142(252):145-156.