| Full text | |
| Author(s): |
Peixoto, Thales Freitas
;
Cavalca, Katia Lucchesi
Total Authors: 2
|
| Document type: | Journal article |
| Source: | TRIBOLOGY INTERNATIONAL; v. 145, MAY 2020. |
| Web of Science Citations: | 0 |
| Abstract | |
Nowadays tendency is the practice of engine downsizing with a turbocharger, to increase fuel economy and decrease emissions. For both design and analysis, a reliable rotor-bearing model is mandatory. In turbochargers, floating-ring bearings support the rotating shaft, with a double-acting thrust bearing, to support axial force imbalances from the compressor and turbine gas flows. The typical turbocharger is highly nonlinear due to the high rotational speeds achieved. Therefore, a turbocharger model, supported by floating-ring and thrust bearings, is developed, considering both bearings nonlinear behaviour, including temperature variations in oil films. The thrust bearing model contemplates a full thermo-hydrodynamic evaluation, while the floating-ring bearing investigation is somewhat simplified. The analysis focuses on the thrust bearing influence in the turbocharger lateral vibrations. (AU) | |
| FAPESP's process: | 15/20363-6 - Fault tolerant identification and control of rotating systems |
| Grantee: | Katia Lucchesi Cavalca Dedini |
| Support Opportunities: | Research Projects - Thematic Grants |