面向灌溉需求的大流量海水提升泵空间导叶优化研究OA
Optimization of the spatial guide vane for improving the efficiency of high-flow seawater lift pumps
[目的]解决大流量海水提升泵大流量工况区效率低、高效区较窄的问题.[方法]以某型大流量海水提升泵空间导叶为研究对象,采用正交设计法,以额定点效率、1.2Qn 及 0.8Qn 工况点效率为评价指标(Qn 为额定流量),选取导叶外缘最大直径 D4、导叶外缘最大直径轴向长度 lD、导叶进口边与叶轮出口边距离 l、导叶进口边与叶轮出口边相应轴面投影间夹角θ 4个因素进行分析.然后对正交设计法筛选出的主要因素进行响应面法优化分析,对构建的回归模型进行寻优,获得最优参数组合.[结果]导叶外缘最大直径 D4 对 1.2Qn 及 0.8Qn 工况点效率影响显著;导叶外缘最大直径D4、导叶外缘最大直径轴向长度lD对额定点效率的影响程度基本持平.综合各评价指标,可得最佳方案组合:导叶外缘最大直径D4为2 149 mm,导叶外缘最大直径轴向长度lD为266 mm,导叶进口边与叶轮出口边距离l为155 mm,导叶进口边与叶轮出口边相应轴面投影间夹角θ为 15°.[结论]降低导叶外缘最大直径 D4,并相应调整其他 3个因素,可以在减小泵径向尺寸的同时,显著提升大流量区效率,为大流量海水提升泵节能增效的优化研究提供参考.
[Objective]High-flow seawater lift pumps are widely used in marine engineering applications,but they often exhibit low efficiency under high-flow conditions.This study investigates the feasibility of improving the efficiency of such pumps by optimizing their spatial guide vane.[Method]The study was based on the orthogonal design method.The pump efficiencies at the rated flow rate(Qn)and the off-design flow at rates of 1.2Qn and 0.8Qn were selected as the optimization objectives;the design variables were four geometric parameters of the vane:the maximum diameter of the outer streamline(D4),the corresponding axial length lD,the distance between the guide-vane leading edge and the impeller outlet(l),and the angle between the guide-vane leading edge and the impeller outlet(θ).The primary factors identified through the orthogonal design were subsequently optimized using response surface methodology(RSM).A regression model was established to determine the optimal geometric parameters of the vane.[Result]The orthogonal experimental results showed that D4 had a significant effect on pump efficiency at both 1.2Qn and 0.8Qn.At the rated flow rate,the effects of D4 and lD on pump efficiency were comparable.Based on a comprehensive evaluation,the optimal geometric parameters of the spatial guide vane were D4=2 149 mm,lD=266 mm,l=155 mm and θ=15o.[Conclusion]Reducing the maximum outer diameter D4,together with a coordinated adjustment of the geometric parameters lD,l and θ can effectively improve the efficiency of the pump in the high-flow region while simultaneously reducing its radial size and manufacturing cost.These results provide a useful reference for efficiency-oriented optimization of high-flow seawater lift pumps.
刘洁琼;吕忠斌;汤玲迪;高超;尤保健
上海凯泉泵业(集团)有限公司,上海 201800上海凯泉泵业(集团)有限公司,上海 201800江苏大学流体机械工程技术研究中心,江苏 镇江 212013上海凯泉泵业(集团)有限公司,上海 201800上海凯泉泵业(集团)有限公司,上海 201800
机械制造
海水提升泵空间导叶效率优化节能增效
seawater lift pumpspatial guide vaneefficiencyoptimizationenergy saving and efficiency improvement
《灌溉排水学报》 2026 (10)
90-97,8
国家自然科学基金项目(52109105)
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