Hytec South Africa recently custom designed and manufactured a 6000 ton power pack for a mine in Lephalale. Supplied in a three metre shipping container, the solution is equipped with a pressurisation unit, control electronics and automated lighting. The power pack was designed, manufactured and commissioned at the Rexroth HUBB in Kempton Park.
The containerised power pack controls the belt feeder on a coal conveyor to determine the amount of coal feeding into the line using proportional control. Independent knife gate control systems control the chute closing with a 350 kN force. Its pressurisation unit supplies clean filtered air at a positive pressure to the inside of the unit, ensuring dust is kept out, and all filters have a 100% backup system to prevent downtime.
“In using a shipping container, we are able to offer the customer a movable hydraulic room,” says Hytec projects manager, Neil Griezel. The 6000 ton power pack has an automated lighting system, which is activated when the door is opened, and the inside of the container acts as a secondary containment system in the event of hydraulic liquids being expelled from the system. Sliding mounts for the electric motor and pump combinations are fitted for ease of maintenance. The whole system consists of transducers and switches, which continuously monitor system performance, and is equipped with an integrated air blast cooler.
The plug-and-play unit will be connected on site to all the hydraulic actuators, switched on and be ready for use.
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