Brakes and controls for underground conveying system in Mongolia


Brake stand with brakes - total weight: 6500 kilograms Image: SUR Engineering

SUR Engineering relies on German manufacturer Dellner Bubenzer to service the mining industry with brake systems and monitoring technology.

Dellner Bubenzer recently supplied brakes for three 7100 tonnes per hour conveying systems, each with an installed power of two 5500 kW gearless drives, for a copper mine in Mongolia.

The scope of supply was including floating calliper brakes SFR50, brake discs, hydraulic power units, UPS, BCC3000 closed loop control systems as well as the complete encoder technology.

The main parameters of the brake like pad wear, stroke (air gap) and brake pad temperature are continuously monitored.

The brakes stop the conveyor within 10 seconds in loaded or unloaded condition. Depending on the parameter, like load, speed etc.,  the HPU and control unit provide different braking levels and scenarios.

The controlled braking process minimises the conveyor belt tension and reduces stresses in the connected equipment. The system is also able to perform the pre-programmed ramps and stopping curves after a power outage.

Redundant controls and HPUs guarantee highest system availability. The environmental conditions need a compact set-up of the brake units. The spring applied, hydraulically released, fail-safe brakes are able to equalise axial movement of the connected shafts.

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