The Rotor Dynamic Analysis and Optimization in Turbocharger

Abstract:

In this paper the rotor dynamic characters of the bearing system in turbocharger are researched. The computing method of rotor dynamic is also analyzed. Through modeling the components and parts of bearing system and rotor dynamic model, the three critical speeds are computed and analyzed. By comparing the working speed and critical speed, we can judge that whether the turbocharger works nearby the critical speed or not. If it does, then how to make the turbocharger work stably is also researched. At the same time, how the key design parameters, such as the shaft length and diameter, impact on rotor dynamic character is discussed in detail. In the end, an optimization strategy of the rotor structure is proposed to make the working speed be away from the critical speed.

• Periodical: Applied Mechanics and Materials (Volumes 226-228)
• Pages: 651-655
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.226-228.651
• Online since: November 2012
• Authors: Na Na He, Hong Zhang
• Keywords: Critical Speed, Optimization, Rotor Dynamic, Turbocharger

References

[1] Shanghai Hudong Shipyard: Marine Waste Gas Turbocharger (China Communications Publications, China 1978) (In Chinese).

[2] D.X. Zhu: Turbocharging and Turbocharger (Arms Industry Institute of 70, China 1985) (In Chinese).

[3] J.L. Gu: Rotor Dynamic, (National Defense Industry Publications, China 1985) (In Chinese).

[4] X.B. Ge: The Critical Speed Research on Automotive Turbocharger, (MS, Beijing Institute of Technology, China 2008) (In Chinese).

[5] W.J. Chen: Introduction to Dynamics of Rotor-Bearing System, Eigen Technologies Inc. (2005).

[6] Edgar J. Gunter and Wen Jeng Chen: Dynamic Analysis of a Turbocharger Floating Bushing Bearings, ISCORMA-3, (Cleveland, Ohio 19-23 2005).