Structural design and stress analysis of a high‑speed turbogenerator assembly supported by hydrodynamic bearings

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2019
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Journal of the Brazilian Society of Mechanical Sciences and Engineering
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Turbine and bushing bearing are the most critical components of high-speed machines. This paper 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 are also determined. The simulations show that the maximum von Mises stress values obtained are associated with the centrifugal force generated by the system rotational movement. The results variation is 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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BENTO, RODRIGO T.; FERRUS FILHO, ANDRE; FUMAGALLI, MARCO A. Structural design and stress analysis of a high‑speed turbogenerator assembly supported by hydrodynamic bearings. Journal of the Brazilian Society of Mechanical Sciences and Engineering, v. 41, n. 10, p. 1-9, 2019. DOI: 10.1007/s40430-019-1946-x. Disponível em: http://repositorio.ipen.br/handle/123456789/30478. Acesso em: 28 Feb 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.

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