大排量离心泵固液两相流磨损特性仿真分析  

Simulation Analysis of The Wearing Characteristics of Solid-Liquid Two-Phase Flow in Centrifugal Pumps

作　　者：彭俊威 周青 耿鹏 董富强 孙天惠 邓伟 李森 PENG Junwei;ZHOU Qing;GENG Peng;DONG Fuqiang;SUN Tianhui;DENG Wei;LI Sen(CNPC National Petroleum Drilling Equipment Engineering Technology Research Center Company Limited,Baoji 721002,China;CNPC Baoji Oifield Machinery Co.,Ltd.,Baoji 721002,China;Xi’an Branch,China Petroleum Materials Company Limited,Xi’an 710018,China;China University of Petroleum,Beijing 102249,China)

机构地区：[1]中油国家油气钻井装备工程技术研究中心有限公司,陕西宝鸡721002 [2]宝鸡石油机械有限责任公司,陕西宝鸡721002 [3]中国石油物资有限公司西安分公司,西安710018 [4]中国石油大学(北京),北京102249

出　　处：《石油矿场机械》2025年第1期44-52,共9页Oil Field Equipment

基　　金：中国石油天然气集团公司“十四五”前瞻性基础性重大科技项目“大功率智能电驱压裂装备关键技术研究”(2022DJ4507)。

摘　　要：针对大排量混砂离心泵,采用CFD-DEM耦合计算方法建立固液两相流仿真模型,对离心泵内两相流流场进行了研究。得到了不同叶轮转速、流量、颗粒粒径和混砂浓度等因素对离心泵外特性的影响。使用OKA、Archard磨损模型计算得到蜗壳及叶轮的磨损量,分析不同工况下颗粒运动过程及颗粒对过流部件的定性定量的磨蚀规律,得到平均磨损率随时间变化曲线,并对不同镀层的离心泵进行数值计算。结果表明,叶轮主要磨损区在根部和压力面中部,转速每增加100 r/min,最大磨损量为叶轮冲击磨损,增加28.5%;流量增加20%,最大磨损量为蜗壳的冲击磨损,增加85%。使用碳化钨镀层,叶轮和蜗壳磨损速率分别降低28.1%和39.95%。研究结果可为混砂离心泵参数设计提供指导意义。In order to establish a solid-liquid two-phase flow simulation model for the large-displacement sand mixing centrifugal pump,a CFD-DEM coupling calculation method was employed.As a result,the two-phase flow field within the centrifugal pump was subsequently studied.The impact of varying impeller speed,flow rate,particle size,and sand mixing concentration on the external characteristics of the centrifugal pump was determined.Additionally,the wearing of the volute and impeller was calculated using the OKA and Archard wear models.The qualitative and quantitative abrasion laws governing particle movement and particles on the overflow parts under different working conditions were analyzed.The average wearing rate variation curve with time was obtained,and the centrifugal pumps with different coatings were numerically calculated.The findings indicated that the predominant areas of impeller wear were located at the root and the midpoint of the pressure surface.For each 100 r/min increase in speed,there was a corresponding increase in wear due to impeller impact,which increased by 28.5%.Additionally,there was a 20%increase in flow rate,and the maximum wear amount was the impact wear of the volute,which increased by 85%.The application of a tungsten carbide coating resulted in a reduction in the wear rates of the impeller and volute by 28.1%and 39.95%,respectively.This finding provides valuable insight that can inform the design of sand-mixing centrifugal pumps.

关 键 词：混砂离心泵 CFD-DEM 磨蚀规律 镀层 

分 类 号：TE934.2[石油与天然气工程—石油机械设备]