Abstract The present state of research on flow induced vibration and noise of centrifugal pumps was introduced. Based on the virtual instrument data acquisition system and a routine pump test system, a closedloop test rig was established for measurement of flow induced vibration and noise in centrifugal pumps. A synchronous acquisition was realized for pump performance parameters and flow induced vibration and noise signals. A singlestage, endsuction centrifugal pump with 5 blades, whose specific speed was 93, was chosen as the experimental model. The additional impellers respectively with 4, 6 and 7 were made and tested in the same volute. The performance of pumps with those four impellers were measured in the whole flow rate, the vibration and noise signals were recorded and processed as well. The experimental results show that the highest vibration intensity is observed in the pump with 5 blades. With increasing flow rate, the vibration intensity level keeps constant initially and then significantly rises. The frequency of noise issued from the pumps mainly was in the range of 0-2 000 Hz. With increasing number of blades, the peak shaft frequency augments gradually at small flow rates. Those outcomes will be instructive and helpful for establishing a hydraulic design method to ensure centrifugal pumps with a low level of flow induced vibration and noise.
TAN Ming-Gao,WANG Yong,LIU Hou-Lin et al. Effects of number of blades on flow induced vibrationand noise of centrifugal pumps[J]. Journal of Drainage and Irrigation Machinery Engin, 2012, 30(2): 131-135.
Yuan Shouqi, Yang Yong, Yuan Jianping, et al. Measurement system design of flowinduced noise in centrifugal pumps[J]. Drainage and Irrigation Machinery, 2009, 27(1): 10-14.(in Chinese)
Perotti R B, Parrondo J L, Perez J G, et al. Discrete noise sources in a centrifugal pump operating at partial load[C]／／Proceedings of the 7th International Congress on Sound and Vibration. Lisboa, Portugal: [s.n.], 2005:1849-1856.
Jiang Y Y,Yoshimura S, Imai R,et al.Quantitative evaluation of flowinduced structural vibration and noise in turbomachinery by fullscale weakly coupled simulation[J].Journal of Fluids and Structures,2007, 23(4): 531-544.
Andreas L, Gunther B. Numerical simulation and evaluation of velocity fluctuations during rotating stall of a centrifugal pump[J].Journal of Fluids Engineering, 2011,133(8): 081102.