The Jin Cheng Coal Group, one of the biggest coal groups in China, found a way to avoid unexpected downtimes of its AFCs (armored face conveyors) and to raise the productivity of the Chang Ping Coal Mine.
In the past, the underground mine was facing a lot of problems because of the AFC drives were equipped with two two-speed motors. The head of the Jin Cheng Coal Group decided to replace the two-speed motors with Voith fluid couplings (type 562 DTPKWL2), in order to prevent chain breaks as well as gearbox and motor breakdowns in the future.
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