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Equilibrado de piezas
El equilibrado representa una fase clave en las tareas de mantenimiento de maquinaria agricola, asi como en la fabricacion de ejes, volantes, rotores y armaduras de motores electricos. Un desequilibrio provoca vibraciones que incrementan el desgaste de los rodamientos, provocan sobrecalentamiento e incluso pueden causar la rotura de los componentes. Con el fin de prevenir fallos mecanicos, es fundamental detectar y corregir el desequilibrio a tiempo utilizando tecnicas modernas de diagnostico.

Principales metodos de equilibrado
Hay diferentes tecnicas para corregir el desequilibrio, dependiendo del tipo de pieza y la magnitud de las vibraciones:

El equilibrado dinamico – Se utiliza en componentes rotativos (rotores, ejes) y se lleva a cabo mediante maquinas equilibradoras especializadas.

Equilibrado estatico – Se emplea en volantes, ruedas y piezas similares donde basta con compensar el peso en un solo plano.

Correccion del desequilibrio – Se lleva a cabo mediante:

Perforado (eliminacion de material en la zona mas pesada),

Instalacion de contrapesos (en ruedas, aros de volantes),

Ajuste de masas de equilibrado (por ejemplo, en ciguenales).

Diagnostico del desequilibrio: equipos utilizados
Para detectar con precision las vibraciones y el desequilibrio, se utilizan:

Maquinas equilibradoras – Permiten medir el nivel de vibracion y determinan con exactitud los puntos de correccion.

Analizadores de vibraciones – Capturan el espectro de oscilaciones, identificando no solo el desequilibrio, sino tambien fallos adicionales (como el desgaste de rodamientos).

Sistemas laser – Se usan para mediciones de alta precision en componentes criticos.

Las velocidades criticas de rotacion requieren especial atencion – regimenes en los que la vibracion aumenta drasticamente debido a fenomenos de resonancia. Un equilibrado correcto previene danos en el equipo en estas condiciones de funcionamiento.

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Elusive shipwreck found in Lake Michigan over 100 years after sinking
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A “ghost ship” that sank in Lake Michigan nearly 140 years ago and eluded several search efforts over the past five decades has been found, according to researchers with the Wisconsin Underwater Archeology Association.

The wooden schooner got caught in a storm in the dead of night and went down in September 1886. In the weeks after, a lighthouse keeper reported the ship’s masts breaking the lake surface, and fishermen caught pieces of the vessel in their nets. Still, wreck hunters were unable to track down the ship’s location — until now.
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Earlier this year, a team of researchers with the Wisconsin Underwater Archeology Association and Wisconsin Historical Society located the shipwreck off the coastal town of Baileys Harbor, Wisconsin, the association announced on Sunday.

Named the F.J. King, the ship had become a legend within the Wisconsin wreck hunter community for its elusive nature, said maritime historian Brendon Baillod, principal investigator and project lead of the discovery.

“We really wanted to solve this mystery, and we didn’t expect to,” Baillod told CNN. “(The ship) seemed to have just vanished into thin air. … I actually couldn’t believe we found it.”

The wreck is just one of many that have been found in the Great Lakes in recent years, and there are still hundreds left to be recovered in Lake Michigan alone, according to Baillod.

The ‘ghost ship’
Built in 1867, the F.J. King plied the waters of the Great Lakes for the purpose of trans-lake commerce. The ship transported grains during a time when Wisconsin served as the breadbasket of the United States. The 144-foot-long (44-meter) vessel also carried cargo including iron ore, lumber and more.

The ship had a lucrative 19-year career until that September night when a gale-force wind caused its seams to break apart, according to the announcement. The captain, William Griffin, ordered the crew to evacuate on the ship’s yawl boat, from where they watched the F.J. King sink, bow first.

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