刮板输送机链环在不同磨料条件下的耐磨性研究

Wear resistance of chain rings of scraper conveyor under different abrasive conditions

为了解决刮板输送机在输运煤料的过程中,刮板链系统会产生三体磨损导致链环磨损失效的问题。采用磨料磨损试验机进行磨料磨损试验,通过正交试验以及单因素试验分析了三种刮板输送机链环材料(YXKB2钢、54钢、25MnVK钢)在不同因素(磨料配比、磨粒粒度、链环材料硬度)下的磨损特性及耐磨性能。试验结果表明:磨料配比对材料磨损量的影响最为显著,磨料配比与磨料粒度耦合作用次之。在等质量磨料条件下,YXKB2钢的磨损量随磨料粒度的增大而下降,但在三体磨损过程中,磨料破碎会导致磨料粒度对材料磨损量的影响不显著;三种链环材料的硬度与耐磨性能呈正相关关系。在试验条件范围内,三种材料耐磨性能由高到低依次为YXKB2钢、25MnVK钢、54钢。

In order to solve the chain ring wear inefficiency of scraper conveyor in coal transportation,which is caused by three-body wear of the scraper chain system.The abrasive wear test was carried out by abrasive wear testing machine,and the abrasion characteristics and wear resistance of three kinds of scraper conveyor chain ring materials(YXKB2 steel,54 steel,and 25MnVK steel)were analyzed by orthogonal test as well as one-way test with different factors(abrasive ratio,abrasive grain size,and hardness of the chain ring materials).The test results show that the effect of abrasive ratio on the amount of material wear is the most significant,and the coupling effect of abrasive ratio and abrasive grit size is the second most significant.Under equal mass abrasive conditions,the wear of YXKB2 steel decreases with increasing abrasive grit size,but in the three-body wear process,abrasive fragmentation leads to a non-significant effect of abrasive grit size on material wear.The hardness of the three chain ring materials was positively correlated with the wear resistance.Within the range of test conditions,the wear resistance of the three materials is YXKB2 steel,25MnVK steel,and 54 steel in descending order.