Design and analysis performance of rotary anti blocking at coal bunker outlet

Rotary anti-blocking is designed using a scrapper/knife that rotates on the inner wall of the coal bunker outlet with a speed of 1 Rpm with a torque of 50.150 Nm. The scrapper /knife is located in the rotor area which is connected to the slewing bearing and is driven by a motor gearbox with a power of 5.5 kW and ratio 1:465. To determine the design dimensions, it is necessary to know in advance the size of the existing coal bunker to coal feeder. Meanwhile, for material design, use materials that are abrasive resistant because coal has a high acid level. Such as the use of stainless steel on the anti-blocking rotary body liner and JIS SCMnH11 manganese steel material on the scrapper/knife. The experiment was carried out on each characteristic with operating time, every 15 minutes, 30 minutes and 60 minutes as well as on variations in flow coal feeder 15 tons/hour, 20 tons/hour, and 25 tons/hour. Then the optimal value can be determined, namely the flow coal feeder of 15 tons/hour, with 1 rotation of anti-blocking scrapper/knife rotary at operating times every 15 and 30 minutes. The flow coal feeder is 20 tons/hour, with 2 rotations anti-blocking scrapper/knife rotary at operating times every 15 and 30 minutes, while the flow coal feeder 25 tons/hour, with 2 rotations anti-blocking scrapper/knife rotary at a time. operation every 15 minutes.