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基于壓力脈動(dòng)和時(shí)序分析的離心泵空化特征提
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on the Method of Centrifugal Pump Cavitation Feature Extraction Based on Pressure Fluctuation and Time Serials Analysis
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    摘要:

    根據(jù)壓力脈動(dòng)幅值對空化變化相當(dāng)敏感的特點(diǎn)，利用離心式水泵試驗(yàn)平臺模擬空化現(xiàn)象，獲取水泵出口壓力信號。研究發(fā)現(xiàn)，在空化發(fā)生時(shí)刻，水泵出口壓力的軸頻幅值增大，且存在 很多低頻脈動(dòng)成分。同時(shí)，根據(jù)試驗(yàn)獲取的殼體振動(dòng)和出口壓力信號，分別建立該水泵正常運(yùn)行的時(shí)間序列數(shù)學(xué)模型，利用模型殘差的方差值判別離心泵的運(yùn)行狀態(tài)，實(shí)現(xiàn)對其空化特征的識別。

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    According to the sensitivity of pressure fluctuation amplitude related with the change of cavitation, the cavitation was first simulated on the centrifugal pump experimentation bed. It was found that the shaft frequency of the pump outlet pressure signal increase; many low frequencies appeared at the time of cavitation happening by using the outlet pressure signal. The natural state time serials model was established by the surface vibration and the outlet pressure signal of pump. Thus the state of centrifugal pump is distinguished and the feature extraction of cavitation is recognized by the variance of the model residual. 

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蘇永生,王永生,張永祥,段向陽.基于壓力脈動(dòng)和時(shí)序分析的離心泵空化特征提[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2009,40(6):81-84. on the Method of Centrifugal Pump Cavitation Feature Extraction Based on Pressure Fluctuation and Time Serials Analysis[J]. Transactions of the Chinese Society for Agricultural Machinery,2009,40(6):81-84.

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