Stability of the axial-auto-balanced impeller of centrifugal pump  

作　　者：Fa-ye Jin Ran Tao Di Zhu Ruo-fu Xiao 

机构地区：[1]College of Water Resources and Civil Engineering,China Agricultural University,Beijing 100083,China [2]Beijing Engineering Research Center of Safety and Energy Saving Technology for Water Supply Network System,Beijing 100083,China [3]College of Engineering,China Agricultural University,Beijing 100083,China

出　　处：《Journal of Hydrodynamics》2022年第4期665-680,共16页水动力学研究与进展B辑（英文版）

基　　金：the National Natural Science Foundation ofChina(Grant Nos.51909131,52079142 and 51836010)。

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.

关 键 词：Canned motor pump impeller axial force auto-balanced impeller Lyapunov stability analysis 

分 类 号：TH311[机械工程—机械制造及自动化]