采煤机截割部行星减速器可靠性分析
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摘要
为研究多因素影响下采煤机截割部行星减速器的可靠性,以MG400/951-WD采煤机为研究对象,根据截齿受力分析和煤样机械性质测定结果,计算出螺旋滚筒受到的载荷曲线。将载荷施加给截割部模型进行仿真,得到行星架与行星轴的应力信息;通过构建应力-可靠度的高斯型隶属度函数,获取行星架与行星轴的可靠度信息。基于正交试验分析煤的普氏系数、采煤机牵引速度及滚筒截割深度对行星减速器可靠度的影响规律及显著性程度,得出结论:采煤机牵引速度对行星减速器可靠性的影响最大,其次是煤的普氏系数,截割深度对行星减速器可靠性的影响最小;随着煤的普氏系数增大,行星减速器可靠度降低的幅度增大,且可靠度降低趋势愈加明显;随着牵引速度和截割深度的增加,行星减速器可靠度降低的幅度趋于平缓。
In order to study reliability of planetary reducer of shearer cutting unit under influence of multiple factors,taking the MG400/951-WD shearer as research object,the load curve of spiral drum is calculated according to force analysis of pick and measurement result of coal sample mechanical properties.The load is applied to the model of cutting unit for simulation,and stress information of planet carrier and planet shaft is obtained.The reliability information of planet carrier and planet shaft is obtained by building a stress-reliability Gaussian membership function.Based on orthogonal test,influence law and significance degree of Protodyakonov coefficient of coal,traction speed of shearer and cutting depth of spiral drum on reliability of planetary reducer are analyzed.It is concluded that traction speed of shearer has the greatest influence on the reliability of planetary reducer,followed by Protodyakonov coefficient of coal,and the cutting depth has the least influence on the reliability of planetary reducer.With the increase of the Protodyakonov coefficient of coal,the decrease of the reliability of planetary reducer increases,and the decrease trend of the reliability becomes more obvious.With the increase of traction speed and cutting depth,the decrease of planetary reducer reliability tends to be gentle.
In order to study reliability of planetary reducer of shearer cutting unit under influence of multiple factors,taking the MG400/951-WD shearer as research object,the load curve of spiral drum is calculated according to force analysis of pick and measurement result of coal sample mechanical properties.The load is applied to the model of cutting unit for simulation,and stress information of planet carrier and planet shaft is obtained.The reliability information of planet carrier and planet shaft is obtained by building a stress-reliability Gaussian membership function.Based on orthogonal test,influence law and significance degree of Protodyakonov coefficient of coal,traction speed of shearer and cutting depth of spiral drum on reliability of planetary reducer are analyzed.It is concluded that traction speed of shearer has the greatest influence on the reliability of planetary reducer,followed by Protodyakonov coefficient of coal,and the cutting depth has the least influence on the reliability of planetary reducer.With the increase of the Protodyakonov coefficient of coal,the decrease of the reliability of planetary reducer increases,and the decrease trend of the reliability becomes more obvious.With the increase of traction speed and cutting depth,the decrease of planetary reducer reliability tends to be gentle.
引文
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[2]毛君,张瑜,张坤,等.采煤机截割部传动系统的非线性动力学建模及仿真[J].中国机械工程,2017,28(1):27-34.MAO Jun,ZHANG Yu,ZHANG Kun,et al.Nonlinear dynamics modeling and simulation of shearer cutting unit transmission system[J].China Mechanical Engineering,2017,28(1):27-34.
[3]刘旭南,赵丽娟,高猛,等.基于强度理论及虚拟仿真相结合的行星减速机构可靠性分析[J].中国安全生产科学技术,2016,12(2):33-38.LIU Xunan,ZHAO Lijuan,GAO Meng,et al.Reliability analysis on planetary reduction mechanism based on combination of strength theory and virtual simulation[J].Journal of Safety Science and Technology,2016,12(2):33-38.
[4]毛君,郭建峰,陈洪月.采煤机行星减速器太阳轮的受力及疲劳寿命分析[J].机械传动,2015,39(11):124-127.MAO Jun,GUO Jianfeng,CHEN Hongyue,et al.Analysis of forces and fatigue life of the sun wheel in shearer planetary reducer[J].Journal of Mechanical Transmission,2015,39(11):124-127.
[5]崔大文,郭冬梅,赵丽娟.采煤机截割部行星架的可靠性分析及优化设计[J].世界科技研究与发展,2011,33(1):68-72.CUI Dawen, GUO Dongmei, ZHAO Lijuan.Reliability analysis and optimum design on planet carrier in shearer's cutting part[J].World Sci-Tech R &D,2011,33(1):68-72.
[6]赵丽娟,田震.采煤机截割部工作稳定性研究[J].机械传动,2012,36(7):14-16.ZHAO Lijuan,TIAN Zhen.Study of the stability of shearer cutting unit[J].Journal of Mechanical Transmission,2012,36(7):14-16.
[7]刘晋霞,马超,曾庆良,等.镐型截齿截割煤岩过程的截割力研究[J].煤炭学报,2017,42(5):1325-1330.LIU Jinxia,MA Chao,ZENG Qingliang,et al.Research on cutting force of conical pick in cutting coal process[J].Journal of China Coal Society,2017,42(5):1325-1330.
[8]谢嘉成,杨兆建,王学文,等.采掘运装备虚拟装配与仿真系统设计及关键技术研究[J].系统仿真学报,2015,27(4):794-802.XIE Jiacheng,YANG Zhaojian,WANG Xuewen,et al.Design and key technologies of virtual assembly and simulation of mining,driving and transporting equipment system[J].Journal of System Simulation,2015,27(4):794-802.
[9]王正,王增全.基于应力-强度干涉的车用发动机机械零部件B10寿命计算方法[J].机械工程学报,2014,50(16):47-53.WANG Zheng, WANG Zengquan. Method for calculating the B10 reliable life of mechanical components of vehicle engine based on the stressstrength interference[J].Journal of Mechanical Engineering,2014,50(16):47-53.
[10]邓聪颖,殷国富,方辉,等.基于正交试验的机床结合部动刚度优化配置[J].机械工程学报,2015,51(19):146-153.DENG Congying,YIN Guofu,FANG Hui,et al.Optimal configuration of dynamic stiffness of machine tool joints based on orthogonal experiment[J].Journal of Mechanical Engineering,2015,51(19):146-153.
[11]张禄,纪威,周炜,等.汽车零部件时变可靠性及其灵敏度分析[J].公路交通科技,2015,32(10):146-152.ZHANG Lu,JI Wei,ZHOU Wei,et al.Analysis of time-dependent reliability and its sensitivity of vehicle components[J]. Journal of Highway and Transportation Research and Development,2015,32(10):146-152.