Resumo

PEREZ-CASTANEDA, Román A.; CAMARAZA-MEDINA, Yanan  e  GARCIA-MORALES, Osvaldo F.. DEVELOPMENT OF EXPRESSION FOR RESISTANCE TO EROSION BY SOLID PARTICLES IN TURBIN BLADES. C.T.F Cienc. Tecnol. Futuro [online]. 2023, vol.13, n.1, pp.5-13.  Epub 27-Jan-2024. ISSN 0122-5383.  https://doi.org/10.29047/01225383.662.

The application of reliability centered maintenance on repairable equipment requires that the reliability calculation should not to be based on failure statistics, as in traditional methods, but rather on its condition. The "load vs resistance" method presumes the comparison of process parameters with carefully selected mechanical properties of the materials. The author proposes the calculation based on parameters monitored for diagnosis purposes. Specifically, he analyzes the erosion of steam turbine blades subject to the action of solid particle from the superheaters, which, under certain conditions, grow to critical thicknesses and due to stress actions caused by thermal changes, fracture and detach, acquiring such energy that then impacts the surface of the blades causing their erosion. These phenomena are analyzed and equations are established in relation with the mechanical properties of the blade metal, with the energy required by oxide flakes to cause their erosion. An expression has been obtained, allowing for the application of the method, which has not been found in analyzed research works.

Palavras-chave : Erosion; Solid particles; Blades; Turbines; Load; Resistance.

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