| 离心风机蜗壳共振频率的探讨 |
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| 引用本文： | 李运江.离心风机蜗壳共振频率的探讨[J].声学技术,2007,26(3):464-466. |
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| 作者姓名： | 李运江 |
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| 作者单位： | 华南理工大学建筑学院,广州,510640 |
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| 摘 要： | 在一些吸声系数和体积较小的工业厂房通风及空调系统中,当风机稳定的频率与房间简正频率相近时,房间会出现强烈和持续的低频嗡声。风机蜗壳共振时出现较大的噪声峰值。根据离心风机蜗壳的声学特点,通过电-力-声类比线路和其数学模型分析,推导出蜗壳结构的两个声学共振简正频率,并与已有文献提供的试验数据进行了比较,结果显示两个共振简正频率之一与蜗壳进气口几何尺寸无关。
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| 关 键 词： | 共振频率 离心风机 蜗壳 |
| 文章编号： | 1000-3630（2007）-03-0464-03 |
| 收稿时间： | 2005-11-22 |
| 修稿时间： | 2005-11-222006-02-06 |
Acoustic resonance frequency of volute casing of centrifugal fans |
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| LI Yun-jiang.Acoustic resonance frequency of volute casing of centrifugal fans[J].Technical Acoustics,2007,26(3):464-466. |
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| Authors: | LI Yun-jiang |
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| Affiliation: | Department of Architecture, South China University of Technology, Guangzhou 510640, China |
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| Abstract: | In ventilation and air conditioning systems in small industrial workshops without sufficient sound absorption capability, strong and continual low-frequency buzz occurs. When the stable frequency of centrifugal fans is close to the natural frequency of the room and the volute casing is under resonance, a peak value of noise appears. Based on the acoustical characteristics of volute casing of centrifugal fans, the analogous circuitry of electricity-mechanics-acoustic and mathematic model is analyzed. Two resonance frequencies of volute casing are derived, one of which shows no correlation with inlet geometry dimension. |
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| Keywords: | resonance frequency centrifugal fan volute casing |
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