Failure Analysis and Optimization of the Rotor System in a Diesel Turbocharger for Rotor Speed-Up Test | Zendy

Zhai Liming | Zendy; Luo Yongyao | Zendy; Wang Zhengwei | Zendy; Liu Xin | Zendy

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Failure Analysis and Optimization of the Rotor System in a Diesel Turbocharger for Rotor Speed-Up Test

Author(s) -

Zhai Liming,

Luo Yongyao,

Wang Zhengwei,

Liu Xin

Publication year - 2014

Publication title -

advances in mechanical engineering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.318

H-Index - 40

ISSN - 1687-8132

DOI - 10.1155/2014/476023

Subject(s) - critical speed , rotor (electric) , turbocharger , rubbing , rotational speed , finite element method , gas compressor , stiffness , control theory (sociology) , automotive engineering , engineering , structural engineering , computer science , mechanical engineering , control (management) , artificial intelligence

During turbocharger rotor speed-up tests, the sensor installed in the compressor greatly affects the rotor dynamics. The effect of the floating bearing stiffness coefficient on the critical rotational speeds and the shaft dynamic response due to the unbalanced mass were both analyzed using rotor dynamics theory and a finite element analysis. The results illustrate that the initial sensor design reduced the 3rd order critical speed to lower than the maximum normal operating speed which leads to the rubbing and failure of the rotor during the speed-up test. The sensor structure was then optimized to reduce the negative influence of the sensor on the rotor dynamic characteristics to ensure stability during rotor speed-up tests.

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