Stability of the axial-auto-balanced impeller of centrifugal pump
作者机构：College of Water Resources and Civil EngineeringChina Agricultural UniversityBeijing 100083China Beijing Engineering Research Center of Safety and Energy Saving Technology for Water Supply Network SystemBeijing 100083China College of EngineeringChina Agricultural UniversityBeijing 100083China
出 版 物：《Journal of Hydrodynamics》 (水动力学研究与进展B辑（英文版）)
年 卷 期：2022年第34卷第4期
页 面：665-680页
核心收录：
学科分类：080704[工学-流体机械及工程] 08[工学] 0807[工学-动力工程及工程热物理]
基 金：the National Natural Science Foundation ofChina(Grant Nos.51909131 52079142 and 51836010)
主 题：Canned motor pump impeller axial force auto-balanced impeller Lyapunov stability analysis
摘 要：The pump is one of the most important energy consuming devices in an energy system. The axial force on a centrifugal pump is an important factor for improving the operation stability and the service life. Based on the Bernoulli’s equation, the formulas of the axial clearance are derived theoretically. The relationship between the impeller axial force, the clearance leakage flow rate and the axial clearance is obtained. The motion differential equation of the axial-auto-balanced impeller is established by the number axis modeling method. The asymptotic stability of the impeller is evaluated by the Lyapunov stability analysis. The transient simulation of the axial-auto-balanced impeller is carried out by the method of the computational fluid dynamics (CFD) with the dynamic mesh technology. The time required for the impeller to reach the stable state under different conditions is calculated. The effective values of the axial force are determined. This research is useful to improve the operation stability of the pump.
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