排灌机械工程学报2013，Vol.31Issue(7)：570-574,5.DOI:10.3969/j.issn.1674-8530.2013.07.004
缝隙引流叶轮离心泵空化试验研究
Experimental study on cavitation performance of centrifugal pump with impeller having leading edge slots
摘要
Abstract
The cavitation performance of a low specific-speed centrifugal pump with impeller having leading edge slots and the conventional one were measured at various flow rates; and the vibration acceleration signals were acquired by the acceleration sensors installed in various locations in the experimental pump casing; eventually the cavitation performance of these two kinds of impellers was compared and the obtained signals indicating the cavitation characteristics were analyzed.The experimental results turn out that a much better cavitation performance has been achieved with the impeller having leading edge slots comparing with the conventional one.After the RMS (root mean square) of the vibration acceleration signals obtained at the Q =26 m3/h condition being analyzed,it was shown that all the normalized energy of the vibration acceleration at three monitoring points increase with decreasing NPSH available; meanwhile,the vibration of the pump with the impeller having leading edge slots is less violent than that with the conventional impeller during the cavitating process.It suggests that the vibration acceleration acquired can monitor the change in the signals effectively before and after cavitation occurs.The signals picked up at the monitoring point near the outlet of the pump is more sensitive to cavitation state,thus this point is more suitable to be used as the cavitation monitoring site compared with the rest monitoring points in this experimental investigation.关键词
离心泵/缝隙引流/空化/振动测试/加速度传感器Key words
centrifugal pump/gap drainage/cavitation/vibration test/aueleration sensors分类
农业科技引用本文复制引用
陈红勋,林育战,朱兵..缝隙引流叶轮离心泵空化试验研究[J].排灌机械工程学报,2013,31(7):570-574,5.基金项目
国家自然科学基金资助项目(51179100) （51179100）
上海市科学技术委员会基金资助项目(10100500200) （10100500200）
上海市高校科研创新团队项目 （）
