张桂冠,赵玉刚,高跃武,刘波,孙义.气-固两相流雾化喷嘴的磨损分析[J].表面技术,2017,46(9):121-126.
ZHANG Gui-guan,ZHAO Yu-gang,GAO Yue-wu,LIU Bo,SUN Yi.Wear Analysis of Gas-Solid Two-phase Flow Atomizing Nozzle[J].Surface Technology,2017,46(9):121-126
气-固两相流雾化喷嘴的磨损分析
Wear Analysis of Gas-Solid Two-phase Flow Atomizing Nozzle
投稿时间:2017-04-09  修订日期:2017-09-20
DOI:10.16490/j.cnki.issn.1001-3660.2017.09.019
中文关键词:  雾化法  气-固两相流  雾化喷嘴  冲蚀磨损  数值模拟  磁性磨料
英文关键词:atomization method  gas-solid two phase flow  atomizing nozzle  erosive wear  numerical simulation  magnetic abrasive
基金项目:国家自然科学基金面上项目(51375285)
作者单位
张桂冠 山东理工大学 精密制造与特种加工山东省重点实验室,山东 淄博 255049 
赵玉刚 山东理工大学 精密制造与特种加工山东省重点实验室,山东 淄博 255049 
高跃武 山东理工大学 精密制造与特种加工山东省重点实验室,山东 淄博 255049 
刘波 山东理工大学 精密制造与特种加工山东省重点实验室,山东 淄博 255049 
孙义 山东理工大学 精密制造与特种加工山东省重点实验室,山东 淄博 255049 
AuthorInstitution
ZHANG Gui-guan Key Laboratory of Precision Manufacturing and Special Processing of Shandong Province, Shandong University of Technology, Zibo 255049, China 
ZHAO Yu-gang Key Laboratory of Precision Manufacturing and Special Processing of Shandong Province, Shandong University of Technology, Zibo 255049, China 
GAO Yue-wu Key Laboratory of Precision Manufacturing and Special Processing of Shandong Province, Shandong University of Technology, Zibo 255049, China 
LIU Bo Key Laboratory of Precision Manufacturing and Special Processing of Shandong Province, Shandong University of Technology, Zibo 255049, China 
SUN Yi Key Laboratory of Precision Manufacturing and Special Processing of Shandong Province, Shandong University of Technology, Zibo 255049, China 
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中文摘要:
      目的 为了解决雾化法磁性磨料制备过程中,雾化喷嘴容易发生冲蚀磨损而无法形成有效流场的问题,分析雾化喷嘴的冲蚀磨损机理,为雾化喷嘴的设计提供理论依据。方法 选用Al2O3硬质磨料颗粒、SiC材料的喷嘴,运用理论分析与计算机模拟(CFD)相结合的方法,探究雾化喷涂冲蚀磨损的机理,并研究雾化压力与最大冲蚀磨损率的关系。结果 运用理论分析,得出了雾化喷嘴的冲蚀磨损形式为脆性断裂与微切削两种。运用CFD计算机模拟分析,得出了雾化喷嘴的冲蚀磨损分布图,其冲蚀磨损率随着雾化压力的增加而增加。当雾化压力为3 MPa时,雾化喷嘴的最大冲蚀磨损率达到了5.3×10-7 kg/(m2•s);当雾化压力为5 MPa时,雾化喷嘴的最大冲蚀磨损率达到了1.3×10-6 kg/(m2•s),较3 MPa时增加了59%。结论 可以采取将硬质磨料注入与雾化工序分离的方法来改进雾化喷嘴的结构,从而减少在制备磁性磨料过程中硬质磨料颗粒对雾化喷嘴内壁的冲蚀磨损。
英文摘要:
      Since atomizing nozzle is easily subject to erosive wear during preparation of magnetic abrasive in atomization method, the work aims to solve the difficulty in forming effective flow field, analyze erosive wear mechanism of atomizing nozzle, and provide theoretical basis for design of atomizing nozzle. Al2O3 hard abrasive particles and SiC nozzle were selected, theoretical analysis and computer simulation (CFD) were combined to explore erosive wear mechanism, and atomization pressure was selected to simulate its relationship with maximum erosive wear rate. Based upon theoretical analysis, it was concluded that the erosive wear forms of the atomizing nozzle were brittle fracture and micro-cutting. Based upon CFD computer simulation analysis, both erosive wear distribution diagram of the atomizing nozzle, and the rule that erosive wear rate increased with the increase of atomization pressure were obtained. At the atomization pressure of 3 MPa, the maximum erosion wear rate of atomizing nozzle reached 5.3×10-7 kg/(m2•s). At the atomization pressure of 5 MPa, the maximum erosion wear rate reached 1.3×10-6 kg/(m2•s), 59% higher than that at 3 MPa. A method of separating the hard abrasive injection and atomization process is proposed to improve structure of the atomizing nozzle, so as to reduce erosive wear of the hard abrasive particles on inner wall of the atomizing nozzle during preparation of the magnetic abrasive.
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