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Structural Design and Stress Analysis of a High-Speed Turbogenerator Assembly Supported by Hydrodynamic Bearings

Structural Design and Stress Analysis of a High-Speed Turbogenerator Assembly Supported by Hydrodynamic Bearings

Rodrigo Teixeira Bento, André Ferrus Filho, Marco Antonio Fumagalli
Copyright: © 2020 |Volume: 10 |Issue: 1 |Pages: 14
ISSN: 2156-1680|EISSN: 2156-1672|EISBN13: 9781799807513|DOI: 10.4018/IJMMME.2020010104
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MLA

Bento, Rodrigo Teixeira, et al. "Structural Design and Stress Analysis of a High-Speed Turbogenerator Assembly Supported by Hydrodynamic Bearings." IJMMME vol.10, no.1 2020: pp.54-67. http://doi.org/10.4018/IJMMME.2020010104

APA

Bento, R. T., Filho, A. F., & Fumagalli, M. A. (2020). Structural Design and Stress Analysis of a High-Speed Turbogenerator Assembly Supported by Hydrodynamic Bearings. International Journal of Manufacturing, Materials, and Mechanical Engineering (IJMMME), 10(1), 54-67. http://doi.org/10.4018/IJMMME.2020010104

Chicago

Bento, Rodrigo Teixeira, André Ferrus Filho, and Marco Antonio Fumagalli. "Structural Design and Stress Analysis of a High-Speed Turbogenerator Assembly Supported by Hydrodynamic Bearings," International Journal of Manufacturing, Materials, and Mechanical Engineering (IJMMME) 10, no.1: 54-67. http://doi.org/10.4018/IJMMME.2020010104

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Abstract

Turbine and bushing bearing are the most critical components of high-speed machines. This article describes the design of a high-speed turbine supported by hydrodynamic bearings. The mathematical dimensioning and the FEM analysis are presented to validate the mechanical strength of the turbine and the bushing bearing models. Fatigue life and factor of safety were also determined. The simulations showed that the maximum Von Mises stress values obtained are associated to the centrifugal force generated by the system rotational movement. The results variation was mainly due to the properties of the materials proposed. For the turbine, 7075-T6 aluminum alloy and SAE 4340 steel obtained satisfactory behavior under a constant operating speed of 30,000 RPM. For the hydrodynamic bearing, the TM23 bronze alloy exhibited excellent results, without fracture, and low mechanical deformation. The models exhibited a great potential employment in several applications, such as biogas systems to generate electrical energy, and educational test bench for thermodynamic and tribological simulations.

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