Abstract: Through structural analysis, vibration spectrum analysis and modal simulation analysis, the vibration transmission path of the shaking floor fan is obtained, and corresponding vibration isolation design is carried out for the path. Finally, through comparative analysis and hand-plate verification, it is confirmed that the low-frequency vibration isolation design of the wind blade can reduce the vibration amplitude of the screen cover 150μm~200μm. The maximum vibration amplitude of the whole machine can be decreased from 300μm to 80μm. The results show that the blade vibration isolation has obvious vibration reduction effect on the resonant vibration of floor fan, which can obviously alleviate the low-frequency resonance of floor fan and greatly improve the quality of the whole machine.

Key words: Floor fan, Modal analysis, Spectrum analysis, Path analysis, Vibration isolation