Experimental observations in the shaft orbits of relatively flexible machines with different rotor related faults

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Abstract

An experimental study on the shaft orbit response for different rotor-related faults is presented in this paper. Similar studies in readily available literature on this subject were previously done considering a few fault conditions on different machines. Therefore, an opportunity exists to provide further insight to changes in the behaviour of a single machine when affected by a wider range of different rotor related faults. Experiments are done on a small laboratory ball bearing rig on which vibration displacement data are acquired for a baseline condition as well as six different fault conditions that are introduced separately at different subcritical steady-state speeds. For each condition tested, orbit plots are generated and critically analysed. These orbits are also compared to those observed on a similarly configured rig with different dynamic characteristics on which the same experiments are done. It is hoped that the present work provides useful material for practical rotor fault diagnosis as well as offer some worthwhile qualitative information to analytical studies related to the faults observed here.
Original languageEnglish
Pages (from-to)320-337
Number of pages18
JournalMeasurement
Volume75
DOIs
Publication statusPublished - Nov 2015

Keywords

  • Orbit plot analysis
  • Vibration analysis
  • Condition monitoring
  • Fault diagnosis
  • Rotating machinery
  • Rotor faults

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