轻型化工渣浆泵叶轮轴向间隙泄漏流及磨损特性分析  

Analysis of Axial Clearance Leakage Flow and its Erosion in Light Chemical Slurry Pump

作　　者：安一超 张人会[1] 李维 孙鹏程 李家虎 An Yichao;Zhang Renhui;Li Wei;Sun Pengcheng;Li Jiahu(School of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Xiangyang 525 Pump Industry Limited Company,Xiangyang 441004,China)

机构地区：[1]兰州理工大学能源与动力工程学院,兰州730050 [2]襄阳五二五泵业有限公司,湖北襄阳441004

出　　处：《流体机械》2020年第1期21-26,共6页Fluid Machinery

基　　金：国家自然科学基金资助项目(51469014);国家重点研发计划项目(2016YFB0200901);甘肃省陇原创新人才计划项目

摘　　要：针对渣浆泵的泵腔及叶轮磨损问题,基于DPM模型对LCF100/350型化工渣浆泵叶轮轴向叶顶间隙泄漏流及磨损特性进行数值分析。在清水介质条件下对泵轴向叶顶间隙泄漏流结构及泵外特性进行模拟,并与试验结果进行对比分析;固液两相流分析中液相采用k-εRealizable湍流模型,固体颗粒相采用离散相模型,分析了叶轮轴向叶顶间隙处固液两相流场分布及其前泵腔磨损特性。分析结果表明:叶轮轴向叶顶间隙泄漏流与主流相互作用,在叶轮流道内产生泄漏涡;泵体磨损强度分布呈螺旋线分布,与实际的泵体磨损情况完全一致。研究结果为渣浆泵的磨损特性的优化提供了理论依据。For the erosion problems of pump cavity and impeller,the leakage flow from axial tip clearance of impellers and the erosion characteristic of LCF100/350 light chemical slurry pump were numerically analyzed based on the DPM model.The external characteristics of the pump and the structure of the tip leakage flow were simulated under the condition of clear water medium,and the results were analyzed and compared with the experimental results;In solid-liquid two-phase flow analysis,the distribution of solid-liquid two-phase flow field in axial tip clearance of impellers and the wear characteristics of the front pump chamber and impeller were analyzed based on the Realizable k-εturbulence model for liquid phase and discrete phase model for solid particle phase.The results show that the leakage flow from axial tip clearance of impellers interacts with the main flow,resulting in leakage vortices in impeller flow passage.And the distribution of wear intensity of the pump body was helical,which is completely consistent with the actual wear condition of the pump body.The research results provide a theoretical basis for optimization of the wear characteristics of slurry pump.

关 键 词：固液两相流 数值模拟 轴向叶顶间隙 磨损 

分 类 号：TH311[机械工程—机械制造及自动化]