Research on kinetic characteristics of aerostatic bearing-rotor system based on ship turbocharger

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Journal of Vibration and Shock ›› 2011, Vol. 30 ›› Issue (12) : 1-6,27.

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Research on kinetic characteristics of aerostatic bearing-rotor system based on ship turbocharger

Yu Hechun 1，2;Ma Wenqi 1;Zhao Guang 3;Wang Zuwen 1;Chen Longxing 1;Liu Haiyan 1

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Abstract

This paper is focused on the aerostatic bearing-rotor system based on ship turbocharger. One quasi-dynamic interaction method between flow field and rotor dynamics is proposed. CFD software is used to calculate the flow field with the varying of eccentricity and rotor speed. Based on the calculation results, one nonlinear fitting function of the bearing load capacity related to eccentricity and rotor speed is deprived. The finite element method and coupled method are used respectively to build the kinetic model of the rotor system and to calculate the kinetic response of it under the influence of the gravity, the unbalanced force and the gas film force. The critical speed and the response characteristics are followed obtained. The computed numerical results are certified by the experiments which show that the coupled method based on the calculation results of CFD calculation can describe the kinetic characteristics of the system with a good accuracy.

Key words

turbocharger / gas bearing / rotor / dynamics / nonlinear / fluid-solid interaction

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Yu Hechun;Ma Wenqi;Zhao Guang;Wang Zuwen;Chen Longxing;Liu Haiyan . Research on kinetic characteristics of aerostatic bearing-rotor system based on ship turbocharger[J]. Journal of Vibration and Shock, 2011, 30(12): 1-6,27