机械方面的故障 起重机的回转支承在回转机构中起着连接上车和底盘部分的作用，又支承着起重机的整个旋转部分。如果回转支承中的钢球损坏、滚道磨损都将影响回转机构的工作，严重时回转机构将出现回转沉重、发出噪声等现象，同时回转液压系统的压力将超过额定值；在停止回转进 Mechanical failure The slewing ring of the crane serves as a connection to the truck and the chassis in the slewing mechanism and also supports the entire rotating part of the crane. If the ball slewing ring is damaged, the wear of the raceway will affect the work of the slewing mechanism. In severe cases, the slewing mechanism will turn heavy and emit noises. At the same time, the pressure of the slewing hydraulic system will exceed the rated value;