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Svendborg BSFI 320 Braking System with SOBO® iQ for Coal Mine Conveyor
Svendborg supplied a complete braking system for use on an overland conveyor at a large
coal mine in Tusimice, Czech Republic. The 1800 mm (72 in.) belt conveyor is 900 m
(2,952 ft.) long and powered by 3 x 500 kW drives.
The opencast coal mine conveyor transports overburden at a rate of 3,000 mt/h with a belt
speed of 4.5 m/s. The braking system, consisting of BSFI 320 dual-spring caliper disc
brakes, a SOBO® iQ controller and SOBO iQ hydraulic power units, provides emergency
stopping and parking functions.
The spring-applied, hydraulically-released BSFI 320 brakes act on a 0.8 m (31.5 in.)
diameter disc mounted on the high-speed side of the drive. Braking time is fully
programmable and, in case of power failure, can reach up to 50 seconds.
SOBO iQ, the next generation of Svendborg’s industry-leading SOBO (Soft Braking Option)
braking controller combines various cutting-edge technologies to provide significant
flexibility, safety and durability on mine conveyors. The controller features three-state digital
modulation and a revolutionary dual-loop PI control (pressure/speed). The pressure control
is based not only on speed but also on deceleration. SOBO iQ controls braking torque by
comparing a preset speed ramp with actual conveyor speed feedback. Advanced functions
including independent overspeed monitoring, rollback, gearbox and out-of-band monitoring
Manufactured in-house, Svendborg’s specialized hydraulic power units are engineered to
perform in tough mining applications. The units are equipped to monitor oil level and
temperature, motor and pump function, and operational pressure.
- BSFI 320 dual-spring
caliper disc brakes
- Unique soft braking
control (SOBO iQ)
- Hydraulic power units