排灌机械工程学报2025，Vol.43Issue(10)：973-980,8.DOI:10.3969/j.issn.1674-8530.24.0050
光热发电用高温熔盐循环主泵结构动力学特性
Structural dynamic characteristics of high-temperature molten salt circulation main pump for concentrated solar power generation
摘要
Abstract
In order to study the vibration and deformation characteristics of the shaft system of the high-temperature molten salt circulation main pump(cold salt pump)and effectively eliminate key is-sues such as resonance fatigue during operation,a newly developed model of molten salt pump was se-lected as the research subject.Its hydraulic characteristics were numerically simulated and experimen-tally verified.The natural frequency and vibration mode,critical speed,and harmonic response analysis based on modal analysis of the molten salt rotor system with and without prestressing were solved.The results indicate that the numerical simulation results of the hydraulic characteristics of the pump with 300 ℃ molten salt and clear water media are in good agreement with the experimental re-sults,with the numerical simulation results slightly higher than the experimental results,with an error less than 5％.The natural frequency of the rotor with prestress is greater than that without prestress,with a maximum increase of 30％,and the amplitude of each order increases first and then decreases with the order.The critical speeds corresponding to the various mode shapes obtained by calculation are much greater than±10％of the rotor's operating speed,indicating that the rotor system do not resonate under standard conditions.When the rotor of the molten salt circulation is subjected to unbalanced ex-citation,the amplitude of the 5th stage impeller is the largest,and the response displacement increases first and then decreases with the frequency,reaching the maximum value when the frequency reaches the natural frequency corresponding to the 1st and 2nd order critical speeds.When the rotor system is subjected to multiple unbalanced excitations with different phase differences,the response displacement amplitude decreases with the increase of the phase difference.Therefore,it is advisable to avoid operating the rotor system at the critical speeds corresponding to the 1st and 2nd order modes,and the phase between the impellers should be staggered during the installation of the rotor system.关键词
熔盐泵/介质物性/流-固-热耦合/谐响应分析/转子动力学Key words
molten salt pump/medium properties/fluid-structure-thermal coupling/harmonic response analysis/rotor dynamics分类
农业科技引用本文复制引用
高雄发,赵阳,张德胜,施卫东,王道红,金永鑫,朱智彧..光热发电用高温熔盐循环主泵结构动力学特性[J].排灌机械工程学报,2025,43(10):973-980,8.基金项目
国家自然科学基金资助项目(51909108) （51909108）
