In order to study the vibration mechanism of a marine centrifugal pump unit and explore the contribution of vibration caused by different vibration excitation sources, a marine centrifugal pump with a specific speed of 66.7 was used for research. A numerical calculation model of the flow field and electromagnetic field of the pump unit was established to analyze the frequency spectrum characteristics and contribution of pump unit vibration caused by different excitation sources. Using the modal superposition method, the vibration characteristics of the pump unit caused by fluid excitation and electromagnetic excitation were analyzed. The results show that the main frequency of pump unit vibration caused by fluid excitation was at the 1× blade passing frequency. The main frequency of pump unit vibration caused by electromagnetic excitation was at the 2× utility frequency. The contribution of different excitation sources to the vibration of marine centrifugal pump unit was in the following order: fluid excitation on the inner surface of the pump electromagnetic excitation fluid excitation in the impeller.

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不同激励源激励的船用离心泵机组振动特性研究

为了研究船用离心泵机组的振动机理，并探讨不同激振源引起的振动的贡献，采用了比转速为66.7的船用离心泵进行研究。建立了泵单元流场和电磁场的数值计算模型，分析了不同激励源引起的泵机组的频谱特性及其对振动的贡献。使用模态叠加法，分析了由流体激励和电磁激励引起的泵单元的振动特性。结果表明，由流体激励引起的泵机组振动的主频率为叶片通过频率的1倍。电磁激励引起的泵单元振动的主频率为2倍效用频率。不同激励源对船用离心泵装置振动的贡献顺序如下：泵内表面的流体激励电磁激励叶轮中的流体激励。