入水平衡装置对自平衡多级离心泵吸水室性能影响研究  

Influence of water entry balance device on the performance of suction chamber self-balancing multistage centrifugal pump

作　　者：刘志民 左久浩 赵任栋[2] 潘越 吕祥彬 李雅婧 LIU Zhimin;ZUO Jiuhao;ZHAO Rendong;PAN Yue;LYU Xiangbin;LI Yajing(College of Mechanical and Equipment Engineering,Hebei University of Engineering,Handan 056038,China;JZEG Fengfeng Group Co.,Ltd.,Handan 056017,China;Shandong Dongshan Gucheng Coal Mine Co.,Ltd.,Jining 273100,China)

机构地区：[1]河北工程大学机械与装备工程学院,河北邯郸056038 [2]冀中能源峰峰集团有限公司,河北邯郸056017 [3]山东东山古城煤矿有限公司,山东济宁273100

出　　处：《煤炭工程》2024年第4期210-217,共8页Coal Engineering

摘　　要：文章从入水方式着手,以自平衡多级离心泵为研究对象,探究了入水平衡装置对自平衡多级离心泵吸水室性能的影响。将平衡水管中心距入水平衡装置出水口距离与平衡水管直径作为设计变量,基于等间距控制变量法构建5组不同对比方案,利用计算流体动力学(CFD)方法对5组方案外特性、压力分布、速度流线分布以及空化性能进行仿真分析。结果表明:平衡水管的有无、位置与大小均可影响自平衡多级离心泵的扬程与效率,对比方案中,离心泵扬程的极差为2 m,效率的极差为0.27百分点;随着平衡水管中心距入水平衡装置出水口距离l或平衡水管直径d越小时,吸水室中高压区明显增大,而涡流密度明显减小,流线更加平顺;吸水室内所发生的空化区域明显减小,优化后方案的吸水室空泡体积分数最大值为90.91%,较优化前方案的吸水室空泡体积分数最大值降低5.4%。Starting from the water inlet mode,we took the self-balancing multistage centrifugal pump as the research object,and explored the influence of the water inlet balancing device on the performance of suction chamber in the self-balancing multistage centrifugal pump.We took the distance between the center of the balance water pipe and the outlet of the water entry balancing device and the diameter of the balance water pipe as design variables;constructed 5 groups of different comparison schemes based on the equally spaced control variable method;used CFD method to simulate and analyze the external characteristics,pressure distribution,velocity streamline distribution and cavitation performance of the schemes.The results show that,the head and efficiency of the self-balancing multistage centrifugal pump is affected by the presence,location and size of the balance water pipe.In the comparison scheme,the range of centrifugal pump head is 2 m and the range of efficiency is 0.27 percentage points.As the distance between the center of the balanced water pipe and the outlet of the water inlet balancing device or the diameter of the balanced water pipe becomes smaller,the high pressure area in the suction chamber increases obviously,while the eddy current density decreases obviously,and the flow line becomes smoother.The cavitation area in the suction chamber decreased significantly,and the maximum volume fraction of the suction chamber of the optimized scheme was 90.91%,which was 5.4% lower than the maximum volume fraction before optimization.

关 键 词：入水平衡装置 自平衡多级离心泵 吸水室性能 计算流体动力学(CFD) 

分 类 号：TH311[机械工程—机械制造及自动化]