文档介绍：第 35 卷第 3期
煤炭学报
Vol. 35 No. 3
2010年
3月
JOURNAL OF CH INA COAL SOC IETY
M ar. 2010
文章编号: 0253 - 9993 ( 2010 ) 03 - 0503 - 06
随机动载荷作用下刨煤机刨链疲劳寿命预测
康晓敏,李贵轩
(辽宁工程技术大学机械工程学院,辽宁阜新 123000)
摘要:通过建立的刨煤机动力学模型,采用雨流法、性 M iner疲劳累积损伤模型,对刨链疲劳寿
命进行预测。通过仿真计算,得到不同随机刨削阻力、同刨链预紧力以及不同链轮齿数作用下的
刨链疲劳寿命。结果表明:刨削阻力均值增加,疲劳寿命降低; 增大刨链预紧力或增加链轮齿数均
可提高刨链疲劳寿命;随机煤壁作用力和刨链预紧力对刨链的疲劳寿命影响较大,链轮多边形效应
影响较小。通过刨链张力测试实验,分析在不同刨削深度情况下张力实验数据,得到刨链疲劳累积
损伤规律与通过仿真得到的规律一致。
关键词:刨煤机;刨链;疲劳寿命;刨削阻力;预紧力
Pred iction of fa tigue life of coa l plow cha in under
stocha stic dynam ic load
(School of M echanical Engineering, L iaoning Technical University, Fuxin 123000, China)
Abstract: Through dynam ic model of the coal p low, rain flow counting m ethod and linear M iner fatigue cumulative
tained under different stochastic cutting resistances, different p retension forces of p low chain and different number of
chastic forces of coal and p retension force of p low chain have obvious effects on fatigue life of p low chain, but influence
of sp rocket polygon effect is less. Test data of chain tension were analyzed under different cutting dep ths through the
test of p low chain tension. And fatigue cumulative damage change of the p low chain accords w ith dam age change of
p low chain by sim ulating dynam ic model.
Key words: coal p low; p low chain; fatigue life; cutting resistance; p retension force
现在面临资源缺乏,薄煤层的开采已提到日程。深入研究具有重要意义。
刨煤机是开采薄煤层的采煤机械,对其理论研究尤显针对矿用圆环链的可靠性,德国学者从材料、加
工工艺、量检查以及防腐蚀等方面对矿用圆环链的
2 ×800 kW ,刨煤机正在向大功率、刨速、动化的特性进行了研究,分析了导致矿用圆环链寿命降低的
方向发展。疲
[1 - 3]
[4 - 7]
因素影响,刨链运行中受到很高动应力的作用。因此
对刨链在动载荷作用下的疲劳寿命、靠性等问题的
收稿日期: 2009 - 07 - 27 责任编辑:许书阁
© 1994-2010 China Academic Journal Electronic Publishing House. All rights reserved.
中图分类号: TD421162 文献标志码: A
KANG Xiao2m in, L I Gui2xuan
damage model were used to p redict fatigue life of p low chain. Through sim ulation, fatigue life of p low chain can be ob2
crease, im rovementsim retensionresults show that increasingnum mean rocke