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吸油烟机异常噪声分析及研究
首发时间：2021-06-16
摘要：某油烟机工作在常用转速下会出现"嗡嗡"异常噪声，在半消声室进行了噪声测量及频谱分析，结果证明该异常噪声是由结构共振导致。本文通过升速振动测试、模态仿真计算及实验模态测试，确定了"嗡嗡"异常噪声是由风机系统扭转模态与电机齿槽转矩激振力吻合产生共振导致的。最后分析了影响扭转振型频率的影响因素，提出了提高共振频率以避免油烟机异常噪声的凯发k8国际首页的解决方案，并通过样机实验进行了结果验证。
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analysis and optimization of abnormal noise for cooker hood
abstract：subjective noise is audible at certain speed for a cooker hood during normal operation, noise measurement and spectrum analysis were performed in semi-anechoic room, it was verified that the subjective noise is caused by structural resonance. based on run-up test, numerical modal analysis and experimental modal analysis, it has been identified that the resonance is caused by motor cogging torque which crosses torsional mode of blower system and final radiate subjective noise. further analysis was performed on influence factors of torsional mode and frequency, solution was given to increase the torsional frequency to avoid subjective noise, prototypes were made to verify the proposed solution.
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