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矿浆泵叶轮磨损数值模拟及陶瓷防护研究
应武权,何家宁,郭凯,毛新超
昆明理工大学机电工程学院,昆明 650500
摘要:
为了解决矿浆泵叶轮磨损腐蚀导致的矿浆泵寿命短、可靠性较差等缺陷。本文通过Fluent软件对矿浆泵叶轮进行了磨损特性的数值分析。模拟得到主要磨损区为叶片进出口压力面,与实际磨损情况基本一致。结合陶瓷涂层耐磨耐腐的特点,采用冷喷涂的方法制备了高铬铸铁基体AT13陶瓷涂层表面试样。测试结果表明:涂层显微硬度高达1020HV;磨损试验测得涂层试样损失质量仅为5.1mg;X射线衍射分析出涂层与基体结合良好;平均孔隙率为1.25%。涂层试样的表面硬度和耐磨性远高于高铬铸铁,涂层质量较好,该涂层工艺可以为矿浆泵叶轮防护提供技术参考。
关键词:  矿浆泵叶轮  数值分析  磨损规律  陶瓷涂层
DOI:10.12044/j.issn.1007-2330.2019.02.005
分类号:TH117
基金项目:云南省人才培养项目 KKSY201501060 云南省人才培养项目(KKSY201501060)
Numerical Simulation of Slurry Wear in Slurry Pump and Research on Ceramic Protection
YING Wuquan,HE Jianing,GUO Kai,MAO Xinchao
Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650500
Abstract:
In order to solve the defects caused by the wear and corrosion of the slurry pump impeller, such as short life and poor reliability. In this paper, the numerical analysis of the wear characteristics of the slurry pump impeller was carried out by Fluent software. The main wear zone is inlet and outlet pressure surfaces of the blade, which is basically consistent with the actual wear. Combined with the wear resistance and corrosion resistance of ceramic coating,the surface sample of the high-chromium cast iron-base AT13 ceramic coating was prepared by cold spraying method. The test results show that the microhardness of the coating is 1020HV; the loss quality of the coating sample is only 5.1mg; X-ray diffraction analysis shows that the coating has good bonding with the matrix; and the average porosity is 1.25%. The surface hardness and wear resistance of the coating sample is higher than that of the high chromium cast iron. The coating quality is good. The coating process can provide technical reference for the protection of the slurry pump impeller.
Key words:  Slurry pump  impeller  Numerical analysis  Law of wear  Ceramic coating