| 离心泵内部流动诱导噪声测试系统设计 |
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| 引用本文： | 袁寿其,杨勇,袁建平,骆寅.离心泵内部流动诱导噪声测试系统设计[J].排灌机械,2009,27(1):10-14. |
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| 作者姓名： | 袁寿其 杨勇 袁建平 骆寅 |
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| 作者单位： | 江苏大学,流体机械工程技术研究中心,江苏,镇江,212013 |
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| 基金项目： | 国家杰出青年科学基金 |
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| 摘 要： | 设计了一套基于虚拟仪器的噪声测试系统,能够便利地对离心泵内部流动诱导噪声信号进行采集、调理、分析,得到噪声特性.应用ST70型水听器测量诱导噪声信号,通过虚拟仪器应用模块分析频谱特征,进而判断机组运行状况.在工频时对5种流量大小状况的诱导噪声进行测试及时域频域分析,发现随着流量的增加,诱导噪声时域波形开始趋于紊乱,而且振幅峰值不断降低;噪声信号在低频范围内组成基本稳定;在500~1000 Hz范围内频谱内有两个峰值,且随流量变化影响很小;在1000~2000 Hz范围内频谱峰值逐渐开始突显.试验表明水听器采集的信号能够反映噪声的基本特性,该测试系统能够进行噪声信号的时域、频域、A计权声级及倍频程等分析,能满足工程和科学研究的需要,具有较好的应用前景.
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| 关 键 词： | 测试系统 虚拟仪器 诱导噪声 频谱 |
Measurement system design of flow-induced noise in centrifugal pumps |
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| Yuan Shouqi,Yang Yong,Yuan Jianping,Luo Yin.Measurement system design of flow-induced noise in centrifugal pumps[J].Drainage and Irrigation Machinery,2009,27(1):10-14. |
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| Authors: | Yuan Shouqi Yang Yong Yuan Jianping Luo Yin |
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| Institution: | Technical and Research Center of Fluid Machinery Engineering;Jiangsu University;Zhenjiang;Jiangsu 212013;China |
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| Abstract: | A measurement system for flow-induced noise based on LabVIEW is designed and applied in the test. The system can easily collect noise signal, and obtain the characteristic of noise. With the sensor ST70 measuring induced noise signal and being sent to applied modules to analyze frequency in virtual instrument modules, it can be used to understand the state of unit running. By comparing five flow measurements, it shows that signal＇s time domain tends to fluctuated wave and its amplitude decreases as flow rate increase. Signals are almost constant at low frequency, but from 500 to 1 000 Hz, two obvious peaks appear and have little change. There is a treney which peaks from 1 000 to 2 000 Hz turns out as flow is growing. Signals by ST70 can represent the basic characteristics of flow-induced noise in test. The measurement system applied in time domain, frequency domain, band octave and so on can be satisfied to meet engineering and research needs in the future. |
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| Keywords: | measurement system virtual instrument induced noise frequency spectrum |
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