六、水轮发电机组开停机步骤和运行注意事项1.机组开机步骤(1)关闭蜗壳和伸缩节的放水阀;开启蜗壳上放气阀,对卧式机组开启考克。(2)开放一切水冷系统、主轴密封排水开关等。(3)打开压力表和真空表开关。(4)开启旁通阀向蜗壳充水(对冲击式机组向弯管闸阀两端压力管充水),待蜗壳内空气全部排除后关 Six, hydroelectric generating units on-off steps and operating precautions 1. Unit boot step (1) turn off the volute and telescopic section of the drain valve; open the volute valve on the volute, open the horizontal unit Cough. (2) Open all water-cooled system, the main shaft seal drainage switch. (3) Open the pressure gauge and vacuum gauge switch. (4) Open the bypass valve to the volute water (on the impact of the unit to the elbow pressure valve at both ends of the water pipe), to be excluded after the air inside the volute off