Abstract：The vibration characteristics of a centrifugal pump with low specific-speed were measured when it was operated at various conditions including different flow rates and rotational speeds and so on. The characteristics of vibration in the pump was analyzed, its internal flow patterns that was related to the characteristics were discussed. The vibration was measured as well when a bypass valve was installed in the pump to explore the method for reducing pump vibration levels when it was working at a low flow rate. It was shown that the pump vibration achieves a minimum level at the design point. Compared with the shut-off condition, the minimum level is lowered by 9 dB, especially for the blade passing frequency and the frequency in the range of 1.5-3 kHz. At off-design conditions, however, the vibration level is increased. This phenomenon is obviously related to the excitation of internal flow at different flow rates. With increasing rotational speed, the overall vibration level rises, especially for the shaft rotational frequency and the low frequency in the range of 10-315 Hz. With increasing bypass flow rate, the pump vibration level decreases steadily until a constant level is reached. Note that the overall vibration level is reduced by 2 dB at the best bypass flow rate, suggesting a properly controlled bypass flow rate can suppress pump vibration level effectively when the pump is operated at a low flow rate.
刘禛, 李兵, 马群南, 朱殿璞. 高扬程离心泵振动特性的试验研究[J]. 排灌机械工程学报, 2013, 31(11): 938-942.
Liu Zhen, Li Bing, Ma Qunnan, Zhu Dianpu. Experiment on vibration characteristics of centrifugal pump with high head. Journal of Drainage and Irrigation Machinery Engin, 2013, 31(11): 938-942.
[1]马群南,吴仁荣,徐琼琰,等. 吸入压力对泵振动和噪声的影响[J]. 水泵技术,2005(2):34-38. Ma Qunnan,Wu Renrong, Xu Qiongyan, et al. The effects of suction pressure on pump vibriation and noise[J]. Pump Technology,2005(2):34-38.(in Chinese)[2]王镇宇,杨爱玲,戴韧. 离心泵流动诱导噪声的数值预测[J]. 机械工程学报,2012,48(6):162-167. Wang Zhenyu, Yang Ailing, Dai Ren. Numerical prediction of the flow-induced noise of centrifugal pump[J]. Journal of Mechanical Engineering, 2012,48(6):162-167.(in Chinese)[3]马俊,唐熊辉,周璞.汽轮给水泵振动分析[J]. 噪声与振动控制,2009(5):74-76,164. Ma Jun,Tang Xionghui, Zhou Pu. Analysis of vibriation on feed-water pump turbine[J]. Noise and Vibration Control, 2009(5):74-76,164.(in Chinese)[4]任志安,郝点,谢红杰. 离心泵的振动测试分析[J]. 石油和化工装备,2008(5):55-59. Ren Zhian,Hao Dian,Xie Hongjie. The vibration test and analysis of centrifugal pump[J]. Petroleum and Chemical Equipment, 2008(5):55-59.(in Chinese)[5]吴英友,赵耀,陈炯.汽轮给水泵机组振动频率特性分析[J].中国舰船研究,2006,1(5/6): 90-93. Wu Yingyou,Zhao Yao,Chen Jiong.Study on vibration frequency characteristics of curbine driven feed pump unit[J].Chinese Journal of Ship Research, 2006,1(5/6): 90-93.(in Chinese)[6]张浩,冯涛,刘碧龙,等.离心泵流噪声实验研究[J]. 噪声与振动控制,2013(1):119-122. Zhang Hao, Feng Tao, Liu Bilong, et al. Experimental study of flow noise for a centrifugal pump[J]. Noise and Vibration Control, 2013(1):119-122.(in Chinese)[7]王勇,刘厚林,刘东喜,等. 叶片包角对离心泵流动诱导振动噪声的影响[J]. 农业工程学报, 2013, 29(1): 72-77. Wang Yong, Liu Houlin, Liu Dongxi, et al. Effects of vane wrap angle on flow induced vibration and noise of centrifugal pumps[J]. Transactions of the Chinese So-ciety of Agricultural Engineering,2013, 29(1): 72-77.(in Chinese)[8]Yuan Shouqi,Ni Yongyan,Pan Zhongyong,et al. Unsteady turbulent simulation and pressure fluctuation analsis for centrifugal pump[J]. Chinese Journal of Menchanical Engineering,2009,22(1):64-69.[9]Zhang Ye,Wang Xiaofang,Xu Shengli.Numerical analysis of pressure fluctuations caused by impeller-diffuser interaction in a mixed flow reactor coolant pump[C]//Proceedings of the Power and Energy Engineering Conference,2011:1-4.[10]Spence R, Amaral-Teixeira J. A CFD parametric study of geometrical variations on the pressure pulsations and performance characteristics of a centrifugal pump[J].Computers and Fluild,2009,38(6):1243-1257.[11]Jiang Y Y,Yoshimura S,Imai R,et al.Quanlitalive eva-luation of flow-induced structural vibration and noise in turbomachinery by full-scale weakly coupled simulation[J]. Journal of Fluids and Structures,2007,23(4):531-554.[12]Andreas L,Gunther B. Numerical simulation and eva-luation of velocity fluctuations during rotating stall of a centrifugal pump[J]. Journal of Fluids Engineering,2011,113(8):081102.[13]Zhao X M, Hu Q H, Lei Y G, et al.Vibration-based fault diagnosis of slurry pump impellers using neighbourhood rough set models[J]. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science,2010,224(4):995-1006.[14]Wang Huaqing, Chen Peng. Intelligent diagnosis me-thod for a centrifugal pump using features of vibration signals[J]. Neural Comput & Applic,2009,18(4):397-405.[15]Sakthivel N R, Sugumaranb V, Babudevasenapati S. Vibration based fault diagnosis of monoblock centrifugal pump using decision tree[J]. Expert Systems with Applications, 2010,37(1):4040-4049.
