渣浆泵内多尺度颗粒运动特性试验研究  

Experimental Study on Multi-Scale Particle Motion Characteristics in Slurry Pump

作　　者：张同路 刘和明 陈卫 ZHANG Tong-lu;LIU He-ming;CHEN Wei(Anhui Jingyu Dredging Technology Service Co.,Ltd,Bengbu 233400,Anhui,China;Anhui Liuxiang Special Ship Co.,Ltd,Chuzhou 239400,Anhui,China;Anhui Jianghuai Ship Inspection Bureau,Hefei 230011,Anhui,China)

机构地区：[1]安徽省静宇清淤技术服务有限公司,安徽蚌埠233400 [2]安徽省留香特种船舶有限责任公司,安徽滁州239400 [3]安徽省江淮船舶检验局,安徽合肥230011

出　　处：《机械研究与应用》2024年第6期23-26,共4页Mechanical Research & Application

摘　　要：渣浆泵广泛应用于各种固液混合物的输送和处理领域。目前对渣浆泵的研究多基于单种颗粒开展固液两相流研究,且粒径较小,而实际渣浆泵的工作过程中输运的固液两相流为多尺度混合颗粒。为揭示渣浆泵内多尺度颗粒运动特性,文章搭建了渣浆泵内流可视化试验测试系统,对额定工况下多尺度颗粒固液两相流进行了可视化拍摄,研究了叶轮旋转、颗粒浓度、颗粒密度和颗粒粒径对泵内颗粒分布及颗粒混输特性的影响。试验结果表明,随着叶轮的旋转,蜗壳第5断面至第9断面和蜗壳出口附近颗粒体积浓度较高。随着颗粒浓度的增加,蜗壳第5断面至第9断面出现明显的颗粒堆积,且蜗壳第2断面至第4断面浓度也会随之升高。在粒径相当的颗粒混输过程中,泵内颗粒分布由颗粒密度决定。而在密度相当的颗粒混输过程中,泵内颗粒分布主要由粒径小的颗粒决定。Slurry pumps are widely used in the transportation and treatment of various solid-liquid mixtures.At present,research on slurry pumps is mostly based on single particle solid-liquid two-phase flow research,and the particle size is small.However,the actual solid-liquid two-phase flow transported by slurry pumps during operation is a multi-scale mixed particle.In order to reveal the multi-scale particle motion characteristics inside the slurry pump,a visualization test system for the internal flow of the slurry pump was built.The visualization of the multi-scale particle solid-liquid two-phase flow under rated conditions was captured,and the effects of impeller rotation,particle concentration,particle density,and particle size on the particle distribution and mixed transport characteristics inside the pump were studied.The experimental results show that the volume concentration of particles from the 5th to 9th sections of the volute and near the outlet of the volute is higher with the impeller rotates.As the particle concentration increases,significant particle accumulation occurs from the 5th to 9th sections of the volute,and the concentration also increases from the 2nd to 4th sections of the volute.When mixing particles with similar sizes,the particle distribution inside the pump is determined by the particle density.When mixing particles with similar density,the particle distribution inside the pump is mainly determined by the smaller particles.

关 键 词：渣浆泵 多尺度 颗粒 混输 可视化试验 

分 类 号：TH311[机械工程—机械制造及自动化]