Bonding Strength of Interference Connection for Supercharger TiAl Turbine

CHEN Guang; PENG Qianliang; LIU Ye; JING Guoxi; CHEN Sheng; LIU Xiaoang

doi:10.3969/j.issn.1001-2222.2024.03.003

Vehicle Engine ›› 2024, Vol. 0 ›› Issue (3) : 18-24. DOI: 10.3969/j.issn.1001-2222.2024.03.003

Bonding Strength of Interference Connection for Supercharger TiAl Turbine

CHEN Guang^1,2,PENG Qianliang^1,2,LIU Ye³,JING Guoxi^1,2,CHEN Sheng^1,2,LIU Xiaoang^1,2

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Abstract

Lightweight titaniumaluminum(TiAl) turbine can significantly improve the power performance of turbocharged engines, but the interference connection between the TiAl turbine and the K418 bushing will produce the failure that has an important impact on the safe operation of supercharger. The material nonlinearity damage criterion of TiAl turbine and K418 bushing was studied, a finite element model of structural strength for the interference connection between TiAl turbine and K418 bushing was established, and the accuracy of model was verified through tensile test. Then the relationship formula between contact stress and friction coefficient was constructed, and the influence of temperature and rotational speed on the strength of TiAl turbine interference joint under high temperature conditions was explored. The results show that the contact stress attenuation at the structural interference interface shows an upward trend with the increase of temperature and the decrease of interference connection strength increases between 400 ℃and 700 ℃.At high temperatures, the higher the speed, the greater the decrease in interference connection strength.

Key words

turbine / friction coefficient / contact stress / interference connection；structural strength

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CHEN Guang,PENG Qianliang,LIU Ye,JING Guoxi,CHEN Sheng,LIU Xiaoang. Bonding Strength of Interference Connection for Supercharger TiAl Turbine[J]. Vehicle Engine. 2024, 0(3): 18-24 https://doi.org/10.3969/j.issn.1001-2222.2024.03.003