论文部分内容阅读
我矿副井JKM2.25×4B多绳摩擦轮提升机配套电控JKMK/J中原带有过速保护GSJ_2与3GSJ。GSJ_2为超速15％动作,用于保护全速段;3GSJ为超速10％动作,用于保护全速段及减速段,均使AC断开,实现紧急制动。分析超速原因,不外乎下放物料过重、动力制动因故障不能投入而制动力不足等。如果能在提升机超速10％以前就使可调闸自动贴闸,则既可避免继续超速,免于紧急制动,又可完成本次提升过程。一、超速自动贴闸原理可调闸磁放大器特性曲线如图1。闸把在全
Mine auxiliary shaft JKM2.25 × 4B multi-rope friction wheel elevator supporting electric control JKMK / J Central with over-speed protection GSJ_2 and 3GSJ. GSJ_2 is an overspeed 15% action for protecting the full speed segment; 3GSJ is an overspeed 10% action for protecting the full speed segment and the deceleration segment, both of which disconnect AC for emergency braking. Analysis of the reasons for speeding, nothing more than decentralization of materials, dynamic braking due to failure can not be put into force and lack of braking force. If the elevator can be overstated 10% before the automatic gate brake, you can avoid to continue to speeding, from the emergency brake, but also to complete the upgrade process. First, speed automatic closing brake principle Adjustable brake magnetic amplifier characteristic curve shown in Figure 1. Brake in the whole