装卸臂快速离合器故障原因分析及解决措施

Failure Cause Analysis and Solution of Quick Connect/Disconnect Coupler of Loading and Unloading Arm

装卸臂是液化天然气(LNG)接收站船岸联通重要设备,目前已建成LNG接收站安装的装卸臂大多为进口设备。快速离合器是装卸臂与船上歧管连接的关键部件,使用过程中频繁出现紧固杆卡涩、紧固不同步以及紧固后又自动打开等故障,造成快速离合器外漏而停止卸船。通过对快速离合器结构以及控制原理分析,找出了快速离合器故障主要原因是结构件设计缺陷、液压分配器内部流道加工缺陷以及液压分配器关闭压力设定值不足等,相应提出了解决措施,并更换使用了新结构快速离合器,解决了快速离合器故障问题。

Loading and unloading arms is the key equipment for ship-to-shore communication in liquefied natural gas(LNG)terminals.Most of the loading and unloading arms installed in the completed LNG terminals are imported equipment.The quick connect/disconnect coupler is the key component of connecting the loading and unloading arm to the manifold on board.During the operation,there are frequent failures such as jamming of the fastening lever,unsynchronised fastening,and automatic opening after fastening,resulting in the quick connect/disconnect coupler leaking and stopping the unloading of the ship.By analyzing the structure and control principle of the quick connect/disconnect coupler,it is found that the main reasons for the failure of the quick connect/disconnect coupler are the design defects of the structural parts,the machining defects of the internal flow path of the hydraulic distributor,and the insufficient setting value of the closing pressure of the hydraulic distributor.Accordingly,solution measures were proposed,and a new structure of quick connect/disconnect coupler was used to solve the problem of quick connect/disconnect coupler failure.