IEEE Power & Energy Magazine - Spanish - September/October 2020 - 48

La tercera visita a las instalaciones se planificó para realizar pruebas de eficiencia de la turbina en una unidad en
cada central eléctrica y realizar mediciones de vibración en
tabla 2. Comprobaciones mecánicas de los
componentes de la turbina.
Equipo
Turbina

Rodete

Compuertas
de paso

Cojinete de
guía

48	

Lista de control de mantenimiento y
reparación
* Estado de los revestimientos y reparaciones
de conductos de agua
* Reparación de la soldadura en el área de los
conductos de agua
* Sistema de monitoreo de vibraciones
* Control de supervisión y controles de
adquisición de datos para evitar operaciones
en zonas difíciles
* Modificación adoptada para mejorar la
eficiencia
* Sistema de inyección de aire para reducir
la vibración y el funcionamiento en zonas
difíciles
* Reparación en la superficie del rodete
debido a pérdida de material por cavitación;
comprobación de la cantidad de material
soldado
* Modificación del rodete para mejorar el
rendimiento de la cavitación y la eficiencia
* Reemplazo del anillo de desgaste del rodete
* Reemplazo del rodete
* Mejora del diseño y perfil de la compuerta
de paso
* Reemplazo del casquillo
* Tipo de junta y reemplazo debido a fugas
excesivas
* Mejora del mecanismo operativo
* Falla de pasador de rotura
* Tipo de lubricación del casquillo y
segmentos de corona de operación
* Reparación/reemplazo del soporte o la
superficie
* Reparación de material antifricción (Babbitt)
* Mejoras en el sistema de lubricación y
refrigeración por aceite
* Registro de temperatura

Junta de eje
rotatorio de
la turbina

* Reparación de la superficie de contacto
(cubierta del eje)
* Tipo de segmento de desgaste,
modificaciones para la mejora
* Fallas de los anillos del segmento de desgaste

Sistema
regulador

* Reemplazo del acumulador
* Reemplazo de la bomba/motor
* Mejora del sistema de filtración
* Reemplazo de componentes hidráulicos
* Reemplazo de aceite del sistema
* Sistema de prueba de muestras de aceite
* Reparación o reemplazo de válvulas de
distribuidor y piloto

Válvula de
entrada de
la turbina

* Reparaciones del revestimiento de la
superficie
* Ajuste y reparaciones de la junta interna
* Reemplazo del casquillo
* Reemplazo de la junta del eje
* Reemplazo del accionador
* Reemplazo de las válvulas

ieee power & energy magazine 	

figura 5. El piso del generador de la unidad 3.

tabla 3. La prueba de evaluación de la condición.
Referencia
del estándar

Equipo

Resistencia al bobinado del
estator

IEEE 115

Generador

Resistencia al aislamiento de
bobinado

IEEE 115

Generador

Prueba de alta tensión
controlada

IEEE 95

Generador

Factor de disipación y elevación

IEEE 115

Generador

Descargas parciales

IEEE 115

Generador

Estado de los sensores de
temperatura

IEEE 62.2

Generador

Prueba del colorante penetrante
para la soldadura de araña del
rotor

IEEE 115

Generador

Aislamiento de los anillos
colectores

IEEE 115

Generador

Prueba de excitación de alta
tensión

IEEE 421 B

Excitador

Comprobación de la
estanqueidad del núcleo del
estator

IEEE 62.2

Generador

Resistencia del bobinado del
rotor

IEEE 115

Generador

Resistencia del aislamiento del
bobinado del rotor

IEEE 115

Generador

Prueba

figura 6. La inspección de la cavitación del rodete de
Francis en la unidad 4.
septiembre/octubre 2020



IEEE Power & Energy Magazine - Spanish - September/October 2020

Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - Spanish - September/October 2020

Contents
IEEE Power & Energy Magazine - Spanish - September/October 2020 - Cover1
IEEE Power & Energy Magazine - Spanish - September/October 2020 - Cover2
IEEE Power & Energy Magazine - Spanish - September/October 2020 - Contents
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