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Esta cortina en Chiapas

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mide 261 metros y

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el agua que detiene

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mueve 8 generadores de

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unos 300 megawatts cada

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uno.

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¿Cómo lo hace?

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El agua baja por

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una tubería forzada y

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llega a la caja

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espiral,

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que la reparte alrededor

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de la turbina.

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Los álabes directrices

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abren y cierran como

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una persiana y controlan

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cuánta agua entra.

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El agua empuja los

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álabes del rodete Francis

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y sale por el

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tubo de aspiración.

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Aquí no hay gearbox,

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la turbina gira lento

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a pocos cientos de

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revoluciones y mueve directo

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al generador.

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Para dar 60 hercios

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a esa velocidad,

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el rotor lleva muchos

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polos salientes,

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por ejemplo 40 polos

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a 180 revoluciones.

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Por eso un hidrogenerador

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es enorme,

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como un disco de

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varios metros.

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La excitación alimenta

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los polos por anillos

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rozantes y el regulador

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mueve los álabes directrices

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para mantener la velocidad.

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Después de décadas,

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la humedad,

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el polvo y el

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calor desgastan el aislamiento

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del estator.

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En TEMISA Power Gen diagnosticamos,

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reparamos y rebobinamos

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generadores.

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Cotiza en temisapowergen.mx