液压电机叶片泵的振动模态分析

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Vibration modal analysis of hydraulic motor-van e pumpJI Hong，WU Jun-he，WANG Jin-lin，SUN Tian-jian(Colege of Energy and Power Engineering，Lanahou Univ.of Tech.，Lamhou 730050，China)Abstract：The excitation source and vibration transfer path in hydraulic motor-vane pump were analyzed，a virtual prototype model was built based on appropriate structure assumption and equivalence，the modalanalysis of hydraulic motor-vane pump was carried out with finite element method，and，finally，the natu-ral frequencies and vibration modes were obtained.The result showed that the natural frequency of hy-draulic motor-vane pump would increase to some extent due to hydrodynamic supporting structure，beingin favor of reducing the vibration and noise.Motor rotor was the key origin of vibration，there might beresonance between motor rotor and vane pump in lower-order mode.The simulation result would provide areference for structural design and reduction of vibration and noise of hydraulic motovane pump。

Key words：hydraulic motor-vane pump；modal analysis；vibration and noise reduction；finite element液压电机泵是将电动机和液压泵直接集成为-体的新型液压动力单元，具有结构紧凑、噪声低、效率高、无外泄漏等优点，液压电机泵具有重要的研究价值和广阔的应用前景。

工程实际中，几乎所有设备都以各自特有的形态处在振动环境中，这不仅有碍产品功能的发挥，而