矿井风机叶片磨损机理与抗磨技术研究进展

从固体颗粒冲击叶片和气固两相流动过程两个方面论述矿井风机叶片磨损机理和规律,分析各种冲蚀磨损理论的优缺点,进而归纳出影响矿井风机叶片磨损的各种因素,其中材料硬度、颗粒特性、冲击速度和冲击角度对叶片磨损影响较大。分析矿井风机叶片多种抗磨防护技术原理并指出:冲蚀磨损机理研究应从宏观的力学分析深入到磨粒与材料的微观和宏观组织相互作用;深入研究动力学机理,将材料单纯的抗磨与抗冲击缓冲相结合;进一步应用数值计算和实验测试方法,提高流场磨粒速度和冲击角时空分布的预测计算精度。从而设计开发出耐磨弹性梯度材料、耐磨新材料和新涂层材料。

The Abrasion Mechanism of Mine Fan Blades and the Development of Anti-abrasion Technology

The abrasion mechanism of mine fan blades is discussed from the aspects of the striking of solid particles and gas-solid flow,and the advantages and disadvantages of various abrasion theories are analyzed as well.The factors influencing the abrasion of blades are concluded and summarized,among which,material hardness,particle characteristics,impact velocity and impact angle are the greatest influencing ones.Then,the anti-abrasion and protection technologies for the mine fan blades are discussed.It is pointed out that the abrasion theory should be studied from the macroscopic mechanical analysis to the interaction between micro structure and macro structure of particles and materials;further researches on impact abrasion kinetics mechanism should combine the simple anti-abrasion of materials with their anti-impact features;the prediction accuracy of flow field particle velocity and angle should be improved by adopting numerical calculation and experimental tests.Thus,the anti-abrasion elastic gradient materials,new anti-abrasion materials and new coating materials can be developed and produced.