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起重机在吊装过程中,如果发动机突然出现故障,没有动力输出,所吊载的货物就会处于悬空状态。此时需使用卷扬机液压系统的应急下放功能,将所吊货物缓慢下放,以保障现场人员及货物的安全。1.卷扬机液压系统结构设置应急下放功能的卷扬机主要由控制回路、工作回路和应急下放回路组成。其中控制回路主要由控制泵1、滤油器3、先导溢流阀5、电磁换向阀7、制动器11等组成,工作回路主要由双向变量马达12、球阀14、冲洗阀15、
Crane hoisting process, if the engine suddenly fails, there is no power output, the goods will be suspended suspended in the state. At this moment, it is necessary to use the emergency decentralization function of the winch hydraulic system to slowly release the suspended goods so as to ensure the safety of on-site personnel and cargoes. 1. Hoist hydraulic system structure set emergency decentralized hoist mainly by the control circuit, the work of the circuit and emergency return circuit. The control circuit is mainly composed of a control pump 1, an oil filter 3, a pilot relief valve 5, a solenoid directional control valve 7 and a brake 11. The working circuit is mainly composed of a bidirectional variable motor 12, a ball valve 14, a flushing valve 15,