1.故障现象1台50t双梁桥式起重机行驶至车间厂房伸缩缝北侧6m处时,起重机大车振动严重。经安全科、工艺部、制造部对该起重机进行现场检查,发现该起重机大车轨道在距离伸缩缝300mm处出现断裂,而裂缝贯通伸缩缝固定螺栓的螺栓孔,如图1所示。起重机大车轨道发生断裂是重大安全隐患,必须尽快解决。 1. Symptom 1 50t double-girder overhead traveling crane to the workshop plant 6m north of the expansion joints, the crane cart vibration serious. The safety department, craft department, manufacturing department on-site inspection of the crane found that the crane cart track at a distance of 300mm from the expansion joints rupture, and cracks through the expansion joint bolts bolt holes, as shown in Figure 1. Cracking of the crane cart track is a major safety hazard and must be solved as soon as possible.