西华大学学报（自然科学版）2026，Vol.45Issue(5)：75-82,8.DOI:10.12198/j.issn.1673-159X.5814
长轴熔盐泵转子动力学特性及轴系优化分析
Rotor Dynamic Characteristics and Shafting Optimization Analysis of Long-Shaft Molten Salt Pumps
摘要
Abstract
Performance experiments in high-temperature molten salt conditions were carried out to solve the stability problems arising from long-shaft molten salt pumps.Based on the fluid-solid coupling analysis,the flow field in the pump and stress-strain characteristics of impeller blades in different media and working conditions were analyzed.The modal law of the rotor shaft system was investigated,and the Latin hypercube sampling method was adopted to optimize the bearing position.The results show that with the in-creasing molten salt temperature,the pump efficiency and head curves shift upward.The larger Reynolds number of the medium leads to smaller hydraulic loss caused by the boundary layer.The hydraulic perform-ance of the molten salt medium at 500℃is better than that of clear water at room temperature.Under differ-ent media and at different temperatures,the maximum stress of the impeller blade approximately positively correlates with the specific gravity of the medium.The maximum deformation of the blade increases with the rising molten salt temperature.The natural frequency and amplitude of the rotor shaft system do not change much in different flow conditions.The optimization results based on Latin hypercube sampling in-dicate that the bearing support should be arranged equidistant.After optimization,the first-order critical speed of the shaft system is about 31%higher than that of the original sample,which effectively avoids the risk of resonance of the rotor shaft system during operation.关键词
长轴熔盐泵/转子系统/流固耦合/轴承位置优化/模态分析Key words
long-shaft molten salt pump/rotor system/fluid-solid coupling/bearing position optimization/modal analysis分类
机械制造引用本文复制引用
胡学卓,张人会,邵文涛..长轴熔盐泵转子动力学特性及轴系优化分析[J].西华大学学报（自然科学版）,2026,45(5):75-82,8.基金项目
甘肃省重大专项(23ZDGH001) （23ZDGH001）
甘肃省联合科研基金项目(24JRRA834) （24JRRA834）
中央引导地方专项(23ZYQA0320). （23ZYQA0320）
