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

Hao Zhang, Zhanqun Shi, Fengshou Gu, Andrew Ball

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

As one of the most common faults, rotor imbalance in a turbocharger will give rise to the bending vibration, which may cause damages 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 twodimensional 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.

LanguageEnglish
Title of host publication7th International Conference on Condition Monitoring and Machinery Failure Prevention Technologies 2010, CM 2010/MFPT 2010
PublisherBritish Institute of Non-Destructive Testing
Pages274-285
Number of pages12
Volume1
ISBN (Print)9781618390134
Publication statusPublished - Aug 2011
Event7th International Conference on Condition Monitoring and Machinery Failure Prevention Technologies - Stratford-upon-Avon, United Kingdom
Duration: 22 Jun 201024 Jun 2010
Conference number: 7

Conference

Conference7th International Conference on Condition Monitoring and Machinery Failure Prevention Technologies
Abbreviated titleCM/MFPT 2010
CountryUnited Kingdom
CityStratford-upon-Avon
Period22/06/1024/06/10

Fingerprint

Bearings (structural)
Rotors
Impellers
Lubricating oils
Linearization
Hydrodynamics
Viscosity
Mathematical models
Monitoring
Computer simulation

Cite this

Zhang, H., Shi, Z., Gu, F., & Ball, A. (2011). Bending vibration of an automotive turbocharger under the influence of rotor imbalance. In 7th International Conference on Condition Monitoring and Machinery Failure Prevention Technologies 2010, CM 2010/MFPT 2010 (Vol. 1, pp. 274-285). British Institute of Non-Destructive Testing.
Zhang, Hao ; Shi, Zhanqun ; Gu, Fengshou ; Ball, Andrew. / Bending vibration of an automotive turbocharger under the influence of rotor imbalance. 7th International Conference on Condition Monitoring and Machinery Failure Prevention Technologies 2010, CM 2010/MFPT 2010. Vol. 1 British Institute of Non-Destructive Testing, 2011. pp. 274-285
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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 damages 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 twodimensional 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.",
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Zhang, H, Shi, Z, Gu, F & Ball, A 2011, Bending vibration of an automotive turbocharger under the influence of rotor imbalance. in 7th International Conference on Condition Monitoring and Machinery Failure Prevention Technologies 2010, CM 2010/MFPT 2010. vol. 1, British Institute of Non-Destructive Testing, pp. 274-285, 7th International Conference on Condition Monitoring and Machinery Failure Prevention Technologies, Stratford-upon-Avon, United Kingdom, 22/06/10.

Bending vibration of an automotive turbocharger under the influence of rotor imbalance. / Zhang, Hao; Shi, Zhanqun; Gu, Fengshou; Ball, Andrew.

7th International Conference on Condition Monitoring and Machinery Failure Prevention Technologies 2010, CM 2010/MFPT 2010. Vol. 1 British Institute of Non-Destructive Testing, 2011. p. 274-285.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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N2 - As one of the most common faults, rotor imbalance in a turbocharger will give rise to the bending vibration, which may cause damages 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 twodimensional 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.

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Zhang H, Shi Z, Gu F, Ball A. Bending vibration of an automotive turbocharger under the influence of rotor imbalance. In 7th International Conference on Condition Monitoring and Machinery Failure Prevention Technologies 2010, CM 2010/MFPT 2010. Vol. 1. British Institute of Non-Destructive Testing. 2011. p. 274-285