Stress corrosion cracking of the slip-ring connectors of a 2 MW wind turbine
Por:
Ramirez, Edgar I., Figueroa, Carlos G., Romero, Jorge L., Ramos, E., Schouwenaars, Rafael, Ortiz, A.
Publicada:
1 nov 2022
Resumen:
The failure of the connectors between the slip ring and rotor of a 2 MW
wind turbine was investigated. Visual inspection, low magnification
stereomicroscopy and scanning electron microscopy showed the presence of
highly branched transgranular cracks. The cracks are in zones of
increased stress, as demonstrated by finite elements. The observations
show that the failure is caused by stress corrosion cracking (SCC).
Fourier transform infrared spectroscopy (FTIR) was used to characterise
the insulating varnish of the slip ring. Tropical climate conditions
cause the wetting of the components and with a close-by livestock plant
is a source of NH3 contamination. Corrections to the design and
manufacturing process of the slip rings were suggested to increase the
life expectancy of the generator, although the selection of an
insulating varnish with higher resistance to environmental exposure is
probably the most efficient manner to reduce the incidence of this
phenomenon in the future.
Filiaciones:
Ramirez, Edgar I.:
Departamento de Materiales y Manufactura, Facultad de Ingeniería, Edificio O, Universidad Nacional Autónoma de México. Avenida Universidad 3000, Ciudad de México, Coyoacán, 04510, Mexico
Univ Nacl Autonoma Mexico, Fac Ingn, Dept Mat & Mfg, Ave Univ 3000, Mexico City 04510, Mexico
Figueroa, Carlos G.:
Departamento de Materiales y Manufactura, Facultad de Ingeniería, Universidad Nacional Autónoma de México, Via de la Innovación 410, PIIT ApodacaNuevo León 66629, Mexico
Univ Nacl Autonoma Mexico, Fac Ingn, Dept Mat & Man, Via Innovac 410, Nuevo Leon 66629, Mexico
Romero, Jorge L.:
Departamento de Materiales y Manufactura, Facultad de Ingeniería, Edificio O, Universidad Nacional Autónoma de México. Avenida Universidad 3000, Ciudad de México, Coyoacán, 04510, Mexico
Univ Nacl Autonoma Mexico, Fac Ingn, Dept Mat & Mfg, Ave Univ 3000, Mexico City 04510, Mexico
Ramos, E.:
Departamento de Materiales y Manufactura, Facultad de Ingeniería, Edificio O, Universidad Nacional Autónoma de México. Avenida Universidad 3000, Ciudad de México, Coyoacán, 04510, Mexico
Univ Nacl Autonoma Mexico, Fac Ingn, Dept Mat & Mfg, Ave Univ 3000, Mexico City 04510, Mexico
Schouwenaars, Rafael:
Departamento de Materiales y Manufactura, Facultad de Ingeniería, Edificio O, Universidad Nacional Autónoma de México. Avenida Universidad 3000, Ciudad de México, Coyoacán, 04510, Mexico
Univ Nacl Autonoma Mexico, Fac Ingn, Dept Mat & Mfg, Ave Univ 3000, Mexico City 04510, Mexico
Ortiz, A.:
Departamento de Materiales y Manufactura, Facultad de Ingeniería, Edificio O, Universidad Nacional Autónoma de México. Avenida Universidad 3000, Ciudad de México, Coyoacán, 04510, Mexico
Univ Nacl Autonoma Mexico, Fac Ingn, Dept Mat & Mfg, Ave Univ 3000, Mexico City 04510, Mexico
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