Location of Repository

The monitoring of cavitation in centrifugal pumps based on the analysis of vibro-acoustic measurements

By Faisal Al Thobiani, Fengshou Gu and Andrew Ball

Abstract

Cavitation in centrifugal pumps causes damages to pump components and produces high levels of vibration and noise, which not only reduces pump performance but also consumes additional energy. Unfortunately, many pumps operate under a certain degree of cavitation for a number of reasons such as varying operating conditions, inadequate installation and harsh environments. To evaluate the degree of cavitation online and to take necessary actions at an early stage, this research focuses on developing a cavitation measurement technique using non-intrusive vibro acoustic techniques. In this paper, conventional vibro-acoustics measurements are examined with different dimensionless parameters for characterizing the signals and hence for cavitation diagnosis. Conventional parameters such as peak factors and kurtosis from both the time domain and frequency domain have been evaluated to be inefficient for indicating cavitation in different stages. However, the spectral entropy has been found to be more accurate in presenting the cavitation. Especially, the spectral entropy from airborne acoustics can yield a better diagnostic result than the surface vibration

Topics: TJ
OAI identifier: oai:eprints.hud.ac.uk:8182

Suggested articles

Preview

Citations

  1. (1948). A mathematical theory of communications. doi
  2. (2004). Detection of cavitation in hydraulic turbines. Mechanical system and signal processing, doi
  3. (2009). Detection of cavitation in operation of kinetic pumps, Use of discrete frequency tone in audible pump spectra using audible sound. doi
  4. (2003). Detection of cavitation phenomenon in a centrifugal pump using audible sound, doi
  5. (2003). Enhanced diagnostic certainty using information entropy theory. doi
  6. (2001). Extracting information entropy features for rotating machinery vibration signals. doi
  7. (1997). FFT spectral entropy and its application in fault diagnosis.
  8. (2007). Measures of uncertainty in power split systems, doi
  9. (2003). Noise as an indicator of cavitation in a centrifugal pump. doi
  10. (1998). Noise as an indicator of cavitation instability in .entrifugal pumps,
  11. (2003). On-line health assessment of integrated pumps, doi
  12. (1983). Sound and Sources of Sound, doi
  13. (2008). Spectral entropy: a complementary index for rolling element bearing performance degradation assessment, doi
  14. (2005). The application of acoustic emission for detecting incipient cavitation and the best efficiency point of a 60KW centrifugal pump; case study doi
  15. (2009). The use of noise and vibration signals for detecting cavitation in kinetic pumps. doi

To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.