刨煤机斜切进刀动态特性分析与实验研究
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摘要
为了研究刨煤机在斜切进刀过程中刨头力学特性及系统动态特性,推导了刨刀在斜切进刀时的截割阻力,并以此为外激励模型,基于有限元法构建了刨煤机系统动力学微分方程。采用数值分析方法对方程进行求解。分析了斜切进刀速度、刨削深度、进刀位置、中部槽偏移角度等因素对刨煤机系统动态特性的影响。通过刨煤机力学测试实验平台对系统动态特性进行了测试,对比分析了理论结果与测试结果,为刨煤机系统工作稳定性、关键零部件的疲劳寿命及工艺参数优化提供理论基础。
Aiming at the mechanical properties of plow head and dynamic charateristics of system under oblique cutting condition,cutting resistance of planning tool under oblique cutting condition was derived,and was treated as external excitation. Dynamic differential equation of plow system were established by using the finite element method,and were solved by using numerical method. The effect of oblique cutting velocity、cutting depth、cutting location、middle trough angle offset on dynamic charateristics of plow system. The dynamic charateristics of plow system were tested based on the mechanical test experimental platform. The test results and theoretical results were compared. The research results provided theoretical basis for working stability、fatigue life of key parts、process parameters optimization of plow system.
Aiming at the mechanical properties of plow head and dynamic charateristics of system under oblique cutting condition,cutting resistance of planning tool under oblique cutting condition was derived,and was treated as external excitation. Dynamic differential equation of plow system were established by using the finite element method,and were solved by using numerical method. The effect of oblique cutting velocity、cutting depth、cutting location、middle trough angle offset on dynamic charateristics of plow system. The dynamic charateristics of plow system were tested based on the mechanical test experimental platform. The test results and theoretical results were compared. The research results provided theoretical basis for working stability、fatigue life of key parts、process parameters optimization of plow system.
引文
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[12] 康晓敏,李贵轩. 多自由度刨煤机动力学模型的建立与仿真[J]. 振动与冲击,2010,29(7):139-144.KANG XiaoMin,LI GuiXuan. Multi-DOF dynamic model for a coal plough with its simulation[J]. Journal of Vibration and Shock,2010,29(7):139-144(In Chinese):40-45.
[13] 刘芮葭. 刨煤机纵向振动特性分析[J]. 辽宁工程技术大学学报,2017,36(1):65-69.LIU RuiJia. Longitudinal vibration characteristics analysis of plough[J]. Journal of Liaoning Technical University,2017,36(1):65-69(In Chinese).
[14] 郝志勇. 刨煤机刨刀刨削煤岩力学特性研究及其优化设计[D]. 阜新:辽宁工程技术大学,2014:40-45.HAOZhiYong. The research on mechanical characteristics of cutting coal and rock and optimization design for coal plow bits [D]. Fuxin:Liaoning Technical University,2014:40-45(In Chinese).
[2] 吕金龙,张守祥. 中国薄煤层自动化刨煤机开采现状与展望[J]. 中国新技术新产品,2014(10):121-122.Lǚ JinLong,ZHANG ShouXiang. Current situation and prospect of mining automation planing coal machine in China [J]. China New Technlogies and Products,2014(10):121-122(In Chinese).
[3] 张东升,赵西贝,于海洋. 刨煤机多体动力学建模与仿真分析[J]. 煤炭科学与技术,2016,44(12):124-129.ZHANGDongSheng,ZHAO XiBei,YU HaiYang. Analysis on multibody dynamics modeling and simulation of coal plough[J]. Coal Science and Techbology,2016,44(12):124-129(In Chinese).
[4] 赵丽娟,陈磊,田震. 刨煤机不同位置刨刀的载荷模拟研究及其强度验证[J]. 机械强度,2017,39(1):79-84.ZHAO LiJuan,CHEN Lei,TIAN Zhen. Simulation study and strength validation of planes’load at different of coal plough[J]. Journal of Mechanical Strength,2017,39(1):79-84(In Chinese).
[5] 郭辰光,李源,胡迪,等.刨刀刨削煤岩特性数值模拟研究[J]. 煤炭科学技术,2017,45(2):141-145.GUO ChenGuang, LI Yuan, HU Di, et al. Numerical simulation study on coal and rock ploughing and planing features of plough cutters[J]. Coal Science and Technology,2017,45(2):141-145(In Chinese).
[6] 毛君,张瑜,刘占胜,等. 间隙条件下刨煤机刨头接触碰撞动态特性研究[J]. 振动与冲击,2015,34(19):224-229.MAOJun,ZHANG Yu,LIU ZhanSheng,et al. Dynamic characteristics of plough head under contact-impact with clearances [J]. Journal of Vibration and Shock,2015,34(19):224-229(In Chinese).
[7] 陈洪月,张瑜,宋秋爽,等. 间隙条件下刨煤机刨头接触碰撞动态特性研究[J]. 机械设计,2016,33(11):45-48.CHEN HongYue,ZHANG Yu,SONG QiuShuang,et al. Dynamic characteristics study of contact-impact of plough plow body with lateral clearance [J]. Journal of Machine Design,2016,33(11):45-48(In Chinese).
[8] 贺洪华,陆俭. 刨煤机刨头的振动分析与仿真研究[J]. 煤矿机电,2013(2):5-7.HEHongHua,LU Jian. Vibration analysis and simulation study of coal plough head [J]. Colliery Mechanical & Electrical Technology,2013(2):5-7(In Chinese).
[9] 康晓敏,李贵轩. 刨煤机刨头的稳定性分析[J]. 中国机械工程,2012,23(22):2739-2742.KANG XiaoMin,LI GuiXuan. Stability analysis of plow body of coal plow [J]. China Mechanical Engineering,2012,23(22):2739-2742(In Chinese).
[10] 李晓豁,刘霞,焦丽,等. 不同工况下滑行式刨煤机的动态仿真研究[J]. 煤炭学报,2010,35(7):1202-1206.LIXiaoHuo,LIU Xia,JIAO Li,et al. Dynamic simulation of sliding coal plow under different working conditions [J]. Journal of China Coal Society,010,35(7):1202-1206(In Chinese).
[11] 康晓敏,李贵轩. 单自由度刨煤机动力学模型的建立与仿真研究[J]. 振动与冲击,2009,28(2):191-195.KANG XiaoMin,LI GuiXuan. Single-degree of freedom dynamic model for a coal plough and its simulation[J]. Journal of Vibration and Shock,2009,28(2):191-195(In Chinese).
[12] 康晓敏,李贵轩. 多自由度刨煤机动力学模型的建立与仿真[J]. 振动与冲击,2010,29(7):139-144.KANG XiaoMin,LI GuiXuan. Multi-DOF dynamic model for a coal plough with its simulation[J]. Journal of Vibration and Shock,2010,29(7):139-144(In Chinese):40-45.
[13] 刘芮葭. 刨煤机纵向振动特性分析[J]. 辽宁工程技术大学学报,2017,36(1):65-69.LIU RuiJia. Longitudinal vibration characteristics analysis of plough[J]. Journal of Liaoning Technical University,2017,36(1):65-69(In Chinese).
[14] 郝志勇. 刨煤机刨刀刨削煤岩力学特性研究及其优化设计[D]. 阜新:辽宁工程技术大学,2014:40-45.HAOZhiYong. The research on mechanical characteristics of cutting coal and rock and optimization design for coal plow bits [D]. Fuxin:Liaoning Technical University,2014:40-45(In Chinese).