摘要
针对目前的离心泵水力设计仅能满足设计工况的问题,提出一种离心泵三工况的水力设计方法,利用离心泵的基本原理,推导出叶轮出口几何参数关于离心泵理论扬程、实际扬程及流量的计算关系式。选取WEZ80×50型离心泵为研究对象,以离心泵叶轮出口关键几何参数为目标变量,通过建立水力损失模型计算得出非设计工况点的性能参数,编写程序进行设计方法验证,采用阈值迭代法确定一组最优的离心泵叶轮几何参数,用数值模拟及试验的方法检验设计方法准确性。结果表明:经过重新设计的离心泵叶轮性能均能满足设计要求且扬程、水力效率误差均在5%以内,提出的设计方法能满足离心泵在三工况运行的设计要求。
For the issue that the current hydraulic design of centrifugal pump can only meet the design condition,a hydraulic design method for centrifugal pumps under three working conditions is proposed.Utilizing the fundamental principle of centrifugal pump,the calculation relationships of impeller outlet geometric parameters regarding the theoretical head,actual head and flow rate of centrifugal pump are derived.The WEZ80×50 centrifugal pump is selected as the research object,with the key outlet geometric parameters of the impeller as the target variables,by establishing a hydraulic loss model,the performance to calculate performance parameters of off-design points and a program is written to verify the design method.A set of optimal centrifugal pump impeller geometric parameter is determined using the threshold iteration method.The accuracy of the design method is verified through numerical simulation and experimental methods.The results show that the performance of the centrifugally redesigned pump impeller at three working points can meet the design requirements,and the errors in head and hydraulic efficiency are within 5%,indicating that the design method proposed in this article can meet the design requirements of centrifugal pumps operating under three working conditions.
作者
杨军虎
李佳旭
杨春野
林疆哈
宋丹玉
王鸣帅
YANG Jun-hu;LI Jia-xu;YANG Chun-ye;LIN Jiang-ha;SONG Dan-yu;WANG Ming-shuai(School of Energy and Power Engineering,Lanzhou University of Science and Technology,Lanzhou 730050,China;Key Laboratory of Fluid Machinery and Systems of Gansu Province,Lanzhou 730050,China;Ebara Great Pumps Co.,Ltd.,Wenzhou 325204,China)
出处
《液压气动与密封》
2025年第7期17-24,共8页
Hydraulics Pneumatics & Seals
基金
国家自然科学基金(52169019)。
关键词
离心泵
三工况
水力设计
叶轮几何参数
centrifugal pump
three working conditions
hydraulic design
geometrical parameter of impeller
