后泵腔宽度对半开式叶轮离心泵性能与轴向力的影响  

Influence of rear chamber width on the performances and axial force of centrifugal pump with front half-open impeller

作　　者：梁武科[1] 刘帆 董玮 吴子娟 魏清希 江伟 LIANG Wu-ke;LIU Fan;DONG Wei;WU Zi-juan;WEI Qing-xi;JIANG Wei(Institute of Water Resources and Hydro-electric Engineering,Xi^n University of Technology,Xi’an 710048,China;College of Water Resources and Architectural Engineering,Northwest A&F University,Yangling 712100,China;Xi’an Pump&Valve Plant Co.LTD,Xi’an 710025,China)

机构地区：[1]西安理工大学水利水电学院,西安710048 [2]西北农林科技大学水利与建筑工程学院,杨凌712100 [3]西安泵阀总厂有限公司,西安710025

出　　处：《水动力学研究与进展（A辑）》2020年第6期688-696,共9页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金资助项目(51809218);陕西省水利科技计划项目经费资助(2019slkj-10,2019slkj-15);陕西省自然科学基础研究计划项目(2019 jlm-58)。

摘　　要：在XUY200-150-250单级单吸双蜗壳悬臂式半开叶轮离心泵性能数值模拟与实验测试结果基本吻合的基础上,选取后泵腔宽度S分别为0.23 Sd、0.49 Sd、0.74 Sd、Sd和1.26 Sd的五种条件,对流量0.79 Qd-1.32 Qd范围内的泵的性能及轴向力进行数值计算。研究后泵腔宽度对离心泵效率、扬程、轴功率和轴向力的影响,分析设计流量Qd工况下,五种不同宽度的泵腔压力分布情况。结果表明:设计流量Qd工况下,后泵腔宽度由0.23 Sd-1.26 Sd增加时,效率呈先增加后保持不变趋势,在后泵腔宽度为0.74 Sd时达到最大值,扬程和轴功率呈逐渐增加趋势变化;后泵腔宽度由0.23 Sd-1.26 Sd增加时,在流量0.79 Qd-1.05 Qd区间内,同一流量工况下,轴向力呈先减小后增大趋势,在后泵腔宽度为0.49 Sd时轴向力值最小;在流量1.16 Qd-1.32 Qd区间内,同一流量工况下,轴向力呈不断增大趋势;后泵腔宽度越大泵腔压力分布越均匀。该研究可以为单级单吸双蜗壳悬臂式半开叶轮离心泵优化性能及平衡轴向力提供依据。On the basis of that the numerical simulation and experimental test about the performance of the centrifugal pump with half-open impeller have the same results, through increasing the width of pump chamber from 0.23 S_d to 1.26 S_d in different flow rate,the performance and axial force of pump were numerically calculated by commercial software CFX17.0. The influence of the width of pump chamber on the efficiency, head, shaft power and axial force were researched under different conditions, and the distribution of liquid pressure in five different widths of pump chamber were studied under the design condition. The results show that with the width of the pump rear chamber increases from 0.23 S_d to 1.26 S_d, the efficiency increases gradually and then remains unchanged, it reaches the maximum value when the width of the pump chamber is 0.74 S_d, head and Shaft power increases too under the design condition;the axial force decreases first and then increases with the increasing of width of pump rear chamber when the flow rate is in the range of 0.79 Q_d to 1.05 Q_d,it decreases to the minimum value when the width of the rear pump cavity is 0.49 S_d;the axial force increase constantly when the flow rate is in the range of 1.16 Q_d to 1.32 Q_d. And it can be found that the distribution of liquid pressure in the pump cavity become more uniform with the increasing of width of pump rear chamber. Therefore, the research provides a basis for optimizing the performance of the semi-open impeller centrifugal pump and balancing the axial force by changing the pump cavity gap in the future.

关 键 词：离心泵 后泵腔宽度 性能 压力 轴向力 

分 类 号：TH311[机械工程—机械制造及自动化]