偏置短叶片对改善重介质旋流器合介入料泵性能的影响  

Effect on performance of qualified medium pump of heavy-medium cyclone produced by offset-arranged short impeller blades

作　　者：吕秀丽 

机构地区：[1]中煤科工集团唐山研究院有限公司,河北唐山063012 [2]河北省煤炭洗选工程技术研究中心,河北唐山063012

出　　处：《选煤技术》2016年第5期1-4,8,共5页Coal Preparation Technology

基　　金：2015年煤炭科学研究总院科技创新基金项目:大型高效蜗壳两产品重介质旋流器的研究(2015ZYJ007)

摘　　要：为了优化设计重介质旋流器合介入料泵的结构,提升设备性能,结合重介质旋流器的阻力特性,从数学机理和物理机理两方面分析偏置短叶片合介入料泵的内部流体流动机理,并利用计算流体力学技术揭示其内部流场分布规律。研究结果表明:偏置短叶片能够改善泵内流体的运动状态,减小压力脉动,降低冲击损失,有效抑制尾流区的形成和发展,此时泵的扬程和水力效率分别提高3.46个百分点和2.66个百分点,这说明偏置短叶片能够改善重介质旋流器合介入料泵的性能。With an aim to optimizing the structural design of H. M. cyclone＇s qualified medium feed pump for improvement of cyclone performance,an analysis is made of the flow mechanism inside the medium pump operating with offset-arranged short blades,based on the resistance characteristics of cyclone and from both mathematical and physical aspects. Following that,the laws governing the flow filed distribution are revealed through computational fluid dynamics analysis. Result of study indicates that the use of the short blades arranged in an offset manner can lead to improvement of state of fluid flow inside the pump,reduction of pressure pulsation and impact loss,effective control of the formation and development of the wake zone and increases of pump head and efficiency by respectively 3. 46 and 2. 66 percentage points. This well demonstrates the pump can work with much improved performance when operating with short blades arranged in a offset manner.

关 键 词：重介质旋流器 合介入料泵 偏置短叶片 阻力特性 流动机理 

分 类 号：TD943[矿业工程—选矿]