大型轴流泵泥沙磨损特性研究  

Research on Sediment Wear Characteristics of Large Axial-Flow Pump

作　　者：林鹏 刘和云 胡东 刘梅清[2] 王舒 赵文胜[2] LIN Peng;LIU Heyun;HU Dong;LIU Meiqing;WANG Shu;ZHAO Wensheng(School of Energy and Mechanical Engineering,Hunan University of Humanities,Science and Technology,Loudi Hunan 417000,Chian;School of Power and Mechanical Engineering,Wuhan University,Wuhan Hubei 430072,China)

机构地区：[1]湖南人文科技学院能源与机电工程学院,湖南娄底417000 [2]武汉大学动力与机械学院,湖北武汉430072

出　　处：《润滑与密封》2019年第9期89-95,共7页Lubrication Engineering

基　　金：国家自然科学基金项目(51409197);湖南省自然科学基金项目(2018JJ2195;2018JJ3253;2017JJ3057);湖北省水利重点科研项目(HBSLKJHT201307);娄底市重点项目

摘　　要：为探讨大型轴流泵的泥沙磨损特性,采用非均相流模型、Particle模型和Tabakoff磨损模型和滑移壁面边界条件,研究泥沙在轴流泵内部的流动规律及磨损机制。结果表明:叶片头部及叶片工作面的泥沙体积分数和磨损率最大,导致叶片头部、工作面磨损速度和程度大于背面;粒径对泥沙的运动轨迹有显著影响,而含沙量的改变对泥沙的运动轨迹影响不大;颗粒在叶轮中的运动速度与粒径呈正相关关系,粒径大的沙粒向叶片工作面运动的趋势更为明显,说明粒径为影响泥沙运动轨迹的一个主要因素,含沙量为一个次要因素;随着泥沙粒径的增大,磨损率范围增大,磨损强度也相应增大,随着含沙量的增大,叶轮内各处磨损率均增大,说明粒径和含沙量均是加快轴流泵磨损的重要因素。To investigate the sediment wear characteristics of large axial-flow pump,the internal flow law and wear mechanism of sediment in axial flow pump were studied,using the inhomogeneous model,Particle model and Tabakoff wear model and slip wall boundary conditions.The results show that the sediment volume fraction,the wear rate of the head and the pressure face of blade are the largest,which will lead to larger wearing speed of the blade face compared with the suction face,and the most significant wear damage in the inlet head.The particle size has a significant effect on the trajectory of sediment,but the change in sediment concentration has little effect on the trajectory of sediment.As particle size grows,the movement velocity of the sediment in the impeller is increased,and its movement towards the blade pressure face becomes more obvious.The wear rate is increased with the increasing of sediment particle size.Particle size is a major factor affecting sediment trajectory,and sediment concentration is a secondary factor.As the particle size of the sediment increases,the wear rate is increased and the wear strength is increased accordingly.As the sediment concentration increases,the wear rate is increased throughout the impeller.It is indicated that both particle size and sediment concentration are important factors in accelerating the wear of axial-flow pumps.

关 键 词：轴流泵 非均相流模型 Particle模型 磨损率 磨损特性 

分 类 号：TH313[机械工程—机械制造及自动化]