Cavitation Detection of a Centrifugal Pump Using Noise Spectrum
Cavitation Detection of a Centrifugal Pump Using Noise Spectrum
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DOI：
10.1115/detc2005-84363
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
S. F. Chini;H. Rahimzadeh;M. Bahrami
中科院分区：
文献类型：
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作者：
S. F. Chini;H. Rahimzadeh;M. Bahrami
气蚀是离心泵的常见故障。对气蚀发生和严重程度的检测和诊断提供了防止有害影响的方法，例如水力性能恶化、泵部件损坏、振动和噪声污染。本文提出了一种基于噪声测量频谱和分析的空化监测新方法。使用麦克风和 PC 测量噪声。配备声卡，Matlab6.1使用快速傅里叶变换将域从时间改变到频率。已经发现，某些频率下的声压级可以用作主要监测特征来检测空化的发生并量化空化的严重性。这些频率之一与叶片的数量有关。其他检测功能也在其他频率中定义。通过增加流量来产生更强的空化效应。版权所有 © 2005 by ASME
Cavitation is a common fault in centrifugal pumps. The detection and diagnosis of the onset and severity of the cavitation provide the means for preventing harmful effects such as deterioration of the hydraulic performance, damage to pump components, vibration and noise pollution. This paper presents a new approach for monitoring cavitation based on the noise measurement spectrum and analysis. Noise is measured using a microphone and a P.C. equipped with soundcard and Matlab6.1 uses Fast Fourier Transform to change the domain from time to frequency. It has been found that the sound pressure level at some frequencies can be used as a primary monitoring feature to detect the onset of the cavitation and to quantify the severity of the cavitation. One of these frequencies is related to the number of blades. Other detection features are defined in other frequencies, as well. Flow rate increase was used to have stronger cavitation effect.Copyright © 2005 by ASME