超大吨位履带起重机采用单卷扬机构缺点有3点:一是要求所配起升钢丝绳倍率较大,长度较长;二是要求卷扬机滚筒体积较大,从而给卷扬机构布置带来困难;三是会使卷扬机滚筒上的钢丝绳层数过多,易于造成钢丝绳挤压和磨损。因此,超大吨位履带起重机大多采用2台卷扬机同步起升。采用2台卷扬机起升时,若2台卷扬机不同步,可能造成吊钩倾斜、钢丝绳脱离滑轮、滑轮损坏等故障,甚至会导致安全事故。因此,采用2台卷扬机起升必须设置同步机构。当卷扬同步机构有故障造成起升不同步时,要立即停机进 Large tonnage crawler cranes with a single hoist shortcomings have three points: First, the requirements of the rationale for lifting the rope with a larger ratio, longer length; second is the larger volume of the hoist drum, which gives the winch mechanism layout difficulties; the third is So that the winch drum rope over the number of layers, likely to cause rope extrusion and wear. Therefore, large tonnage crawler cranes are mostly used 2 hoist synchronous lifting. When 2 winches are hoisted, if 2 winches are not synchronized, the hook may be inclined, the rope may be disconnected from the pulley, the pulley is damaged, or even a safety accident may occur. Therefore, the use of two hoist hoist must be set up synchronization mechanism. When the winch synchronization mechanism failure caused lifting is not synchronized, it should immediately shut down