简单介绍近年来水轮机主轴工作密封多次烧焦被迫停机的事例，对事故原因进行分析，最后总结出保证活塞式端面橡胶密封安全运行具体做法。 In this paper, a brief introduction of the cases in which the working shaft of a hydraulic turbine has been shut down several times and burned shut down in recent years is briefly introduced, the cause of the accident is analyzed, and finally the specific practices for ensuring the safe operation of the piston type rubber seal are summarized.