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电站施工和港口装卸用的门座起重机,以及建筑施工用的塔式起重机等都是旋转类型的起重机。旋转机构是旋转起重机的主要工作机构之一,它的作用是使已被起升在空间的物品绕起重机的垂直轴线作圆弧运动,以实现物品的水平输送。
Portal cranes for power station construction and port handling, and tower cranes for construction use are all rotating type cranes. Rotating mechanism is one of the main working mechanism of rotating crane. Its function is to make the objects that have been lifted in space move circularly around the vertical axis of the crane to realize the horizontal transportation of objects.