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起重机械的活配重是用来平衡臂架系统在变幅过程中的重心位置变化的,它主要用于门座起重机及部分浮游起重机上,因为这些机械的变幅机构属于频繁工作的机构,其负荷持续率(JC)值常达40%以上。为了改善变幅机构
The live weight of the crane is used to balance the position of the center of gravity of the boom system during the luffing process. It is mainly used on the portal cranes and some floating plank cranes because these mechanical luffing mechanisms belong to the institutions that work frequently , The load sustained rate (JC) often up to 40%. In order to improve the luffing mechanism