The danger of overhead travelling cranes overloading

The danger of overhead travelling cranes overloading: The excessive stress produced by the overload of the overhead travelling cranes can cause the steel wire rope to break, the driving parts are damaged, and the motor is burnt out. Due to the braking force is insufficient, brake can not hold brake lead to major accidents. Overload operation is very harmful to overhead travelling cranes structure, On the typical example of this is caused by girder downwarping, crack of cover board and web, desoldering and bring serious accidents of overhead travelling cranes safe operation. Because of the deflection of the main beam, the trolley track will deform along with the main beam. When the trolley is driven from middle to back, it is necessary not only to overcome the normal running resistance, but also to overcome the additional resistance caused by climbing. When serious, the trolley running mechanism, motor will be burned. In addition, the trolley will appear "slipping" phenomenon, the trolley itself, seriously affecting lifting operations. For the double girder overhead travelling cranes, it will cause the car "three legs" to run, because of the horizontal bending, it will make the small operation "gnaw rail" phenomenon.

Overload operation is more harmful to boom overhead travelling cranes, and often causes major accidents of boom and tower broken. The stability of the overhead travelling cranes is damaged by overloading, also can cause the whole machine overthrow the malignant accident.