由于膨胀机与冷箱间的过桥太长且未设置中间竖直支掌,使水平误差超标;同时由于膨胀机止推轴承推力的设计值偏小,导致膨胀机试车时发生了轴瓦烧毁事故。简介膨胀机的设计参数和试车前的检查和整改工作,介绍烧瓦事故的过程、处理措施和效果。 As the bridge between the expander and the cold box is too long and there is no middle vertical support, the horizontal error exceeds the standard. At the same time, due to the design value of the thrust of the expander thrust bearing is too small, the bearing burned accident occurs when the expander is tested . Brief introduction expander design parameters and test before the inspection and rectification work, describes the process of burning tile accidents, treatment measures and effects.