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Bending vibration of an automotive turbocharger under the influence of rotor imbalance

Zhang, Hao, Shi, John Z., Gu, Fengshou and Ball, Andrew (2010) Bending vibration of an automotive turbocharger under the influence of rotor imbalance. In: CM 2010 and MFPT 2010 The 7th International Conference on Condition Monitoring and Machinery Failure Prevention Technologies, 22-24 June 2010, Ettington Chase, Stratford-upon-Avon, England. (Unpublished)

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      Abstract

      As one of the most common faults, rotor imbalance in a turbocharger will give rise to the bending vibration, which may cause damage to and even destroy the bearings and impellers. Therefore, it is necessary to detect rotor imbalance as early as possible. The present paper develops a mathematical model for investigating the rotor dynamic characteristics of a commercial automotive turbocharger supported on floating ring bearings. In order to reveal the behaviours of oil film instabilities the model takes into account nonlinear hydrodynamic oil film forces instead of linearization. A two-dimensional elastic collision model is introduced to deal with the rub-impact process between such solid parts as journal, floating ring and the bearing. In addition, the change of clearances in floating ring bearing due to temperature increases are also estimated by ignoring the variation of lubricating oil viscosity. Following model development, a numerical simulation is implemented to study the bending vibration of the turbocharger and floating ring bearing under the influence of rotor imbalance. This study paves a foundation for the monitoring of turbochargers.

      Item Type: Conference or Workshop Item (Paper)
      Subjects: T Technology > TJ Mechanical engineering and machinery
      Schools: School of Computing and Engineering
      School of Computing and Engineering > Automotive Engineering Research Group
      School of Computing and Engineering > Centre for Precision Technologies
      School of Computing and Engineering > Centre for Precision Technologies > Surface Metrology Group
      School of Computing and Engineering > Diagnostic Engineering Research Centre
      School of Computing and Engineering > Diagnostic Engineering Research Centre > Energy, Emissions and the Environment Research Group
      School of Computing and Engineering > Diagnostic Engineering Research Centre > Machinery Condition and Performance Monitoring Research Group
      School of Computing and Engineering > Diagnostic Engineering Research Centre > Measurement System and Signal Processing Research Group
      School of Computing and Engineering > Informatics Research Group
      School of Computing and Engineering > Informatics Research Group > XML, Database and Information Retrieval Research Group
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      Depositing User: Hao Zhang
      Date Deposited: 03 Aug 2010 14:20
      Last Modified: 24 Jun 2011 09:48
      URI: http://eprints.hud.ac.uk/id/eprint/8187

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