Journal of Applied Science and Engineering

Published by Tamkang University Press


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Can Kang This email address is being protected from spambots. You need JavaScript enabled to view it.1, Yongchao Zhang1 , Yilin Xiong2 and Qing Li1

1 School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, P.R. China
2 KSB Shanghai Pump Co., Ltd., Shanghai 200245, P.R. China


Received: April 11, 2018
Accepted: June 30, 2018
Publication Date: December 1, 2018

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Emphasis was placed on the vibration of a horizontally installed two-stage condensate pump. The vibration was caused by resonance, which was confirmed through a vibration test, and the resonance frequency was acquired. The source of vibration was sought from both flow and structural aspects. Computational fluid dynamics technique was used to calculate typical frequencies excited by flows in the pump. Finite element analysis was executed to locate the structural factors that might contribute to the resonance and to enable a modal analysis of the pump base. The test results demonstrate that the resonance frequencies are slightly less than 100 Hz. Nevertheless, the flow-induced dominant frequencies deviate considerably from the resonance frequencies. Regarding the motor, it is featured by a dominant frequency of 100 Hz under the no-load condition; therefore, the primary reason of the pump unit resonance is manifested. Two strategies of reconstructing the pump base were attempted to eliminate resonance. Through adding reinforcing ribs to the supporting frame under the motor, the natural frequencies of the pump base associated with the second- and third-order modes increase relative to their counterparts of the original scheme. The effect of such a strategy was validated by test results. The other strategy is secondary grouting, with which the resonance frequency was avoided and the stiffness of the pump base was elevated remarkably.

Keywords: Condensate Pump, Resonance, Pump Base, Vibration Test, Simulation, Modal Analysis


  1. [1] Lancha, A. M., M. Serrano, and D. Gómez Briceño (1999) Failure Analysis of a Condensate Pump Shaft, Engineering Failure Analysis 6, 226–242.
  2. [2] Egusquiza, E., C. Valero, D. Valentin, A. Presas, and C. G. Rodriguez (2015) Condition Monitoring of Pump-turbines. New Challenges, Measurement 67, 151– 163. doi: 10.1016/j.measurement.2015.01.004
  3. [3] Mustata, S. C., D. Dracea, A. S. Tronac, N. Sarbu, and E. Constantin (2015) Diagnosis and Vibration Diminishing in Pump Operation, Procedia Engineering 100, 970–976. doi: 10.1016/j.proeng.2015.01.456
  4. [4] Bordoloi, D. J. and R. Tiwari (2017) Identification of Suction Flow Blockages and Casing Cavitations in Centrifugal Pumps by Optimal Support Vector Machine Techniques, Journal of the Brazilian Society of Mechanical Sciences Engineering 39, 2957–2968. doi: 10.1007/s40430-017-0714-z
  5. [5] Osada, T., T. Kawakami, T. Yokoi, and Y. Tsujimoto (1999) Field Study on Pump Vibration and ISO’s New Criteria, Journal of Fluids Engineering–Transactions of the ASME 121, 798–803. doi: 10.1115/1.2823539
  6. [6] Adamkowski, A., A. Henke, and M. Lewandowski (2016) Resonance of Torsional Vibrations of Centrifugal Pump Shafts Due to Cavitation Erosion of Pump Impellers, Engineering Failure Analysis 70, 56–72. doi: 10.1016/j.engfailanal.2016.07.011
  7. [7] Lomakin, V. O., P. S. Chaburko, and M. S. Kuleshova (2017) Multi-criteria Optimization of the Flow of a Centrifugal Pump on Energy and Vibroacoustic Characteristics, Procedia Engineering 176, 476–482. doi: 10.1016/j.proeng.2017.02.347
  8. [8] Spence, R. and J. Amaral-Teixeira (2008) Investigation into Pressure Pulsations in a Centrifugal Pump Using Numerical Methods Supported by Industrial Tests, Computers & Fluids 37, 690–704. doi: 10. 1016/j.compfluid.2007.10.001
  9. [9] Kang, C. and Y. X. Li (2015) The Effect of Twin Volutes on the Flow and Radial Hydraulic Force Production in a Submersible Centrifugal Pump, Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 229(2), 221–237. doi: 10.1177/0957650914562920
  10. [10] El-Gazzar, D. M. (2017) Finite Element Analysis for Structural Modification and Control Resonance of a Vertical Pump, Alexandria Engineering Journal 56, 695–707. doi: 10.1016/j.aej.2017.02.018
  11. [11] Zhang, M., Z. N. Jiang, and K. Feng (2017) Research on Variational Mode Decomposition in Rolling Bearings Fault Diagnosis of the Multistage Centrifugal Pump, Mechanical Systems and Signal Processing 93, 460–493. doi: 10.1016/j.aej.2017.02.018
  12. [12] Buono, D., D. Siano, E. Frosina, and A. Senatore (2017) Gerotor Pump Cavitation Monitoring and Fault Diagnosis Using Vibration Analysis through the Employment of Auto-regressive-moving-average Technique, Simulation Modelling Practice and Theory 71, 61–82. doi: 10.1016/j.simpat.2016.11.005
  13. [13] Zhang, J. Y., S. J. Cai, Y. J. Li, H. W. Zhu, and Y. X. Zhang (2016) Visualization Study of Gas-liquid Twophase Flow Patterns Inside a Three-stage Rotodynamic Multiphase Pump, Experimental Thermal and Fluid Science 70, 125–138. doi: 10.1016/j. expthermflusci.2015.08.013
  14. [14] Norrbin, C. S., D. W. Childs, and S. Phillips (2017) Including Housing-casing Fluid in a Lateral Rotordynamics Analysis on Electric Submersible Pumps, Journal of Engineering for Gas Turbines and Power 139, 062505–1–062505–12. doi: 10.1115/1.4035358
  15. [15] Minette, R. S., S. F. Silva Neto, L. A. Vaz, and U. A. Monteiro (2016) Experimental Modal Analysis of Electrical Submersible Pumps, Ocean Engineering 124, 168–179. doi: 10.1016/j.oceaneng.2016.07.054
  16. [16] Chen, H. X., Z. Ma, W. Zhang, B. Zhu, R. Zhang, Q. Wei, Z. C. Zhang, C. Liu, and J. W. He (2017) On the Hydrodynamics of Hydraulic Machinery and Flow Control, Journal of Hydrodynamics 29(5), 782–789. doi: 10. 1016/S1001-6058(16)60789-8
  17. [17] Long, Y., R. S. Zhu, D. Z. Wang, L. Y. Jun, and T. B. Li (2016) Numerical and Experimental Investigation on the Diffuser Optimization of a Reactor Coolant Pump with Orthogonal Test Approach, Journal of Mechanical Science & Technology 30(11), 4941–4948. doi: 10. 1007/s12206-016-1014-8
  18. [18] Al-Qutubm, A. M., A. E. Khalifa, and F. A. Al-Sulaiman (2012) Exploring the Effect of V-shaped Cut at Blade Exit of a Double Volute Centrifugal Pump, Journal of Pressure Vessel Technology–Transactions of the ASME 134, 021301–1–021301–8. doi: 10.1115/1.4004798
  19. [19] Kumar, A. and R. Kumar (2017) Time-frequency Analysis and Support Vector Machine in Automatic Detection of Defect from Vibration Signal of Centrifugal Pump, Measurement 108, 119–133. doi: 10.1016/j. measurement.2017.04.041
  20. [20] Hsu, C. N. (2015) Experimental and Performance Analyses of a Turbomolecular Pump Rotor System, Vacuum 121, 260–273. doi: 10.1016/j.vacuum.2015.06. 029
  21. [21] Liu, M. R., H. Xia, L. Sun, B. Li, and Y. Yang (2015) “Vibration Signal Analysis of Main Coolant Pump Flywheel Based on Hilbert-Huang Transform, Nuclear Engineering Technology 47, 219–225. doi: 10.1016/j. net.2014.12.010 [22] Tompkins, M., R. Stakenborghs, and G. Kramer (2016) Use of FEA Software in Evaluating Pump Vibration and Potential Remedial Actions to Abate Resonance in Industrial Vertical Pump/motor Combinations, Proceedings of the 2016 24th International Conference on Nuclear Engineering, ICONE24, Charlotte, USA. doi: 10.1115/ICONE24-60890