汽轮机调节系统卡涩原因分析及处理措施

Analysis on reasons of jam fault of steam turbine governing system and treatment measures

针对汽轮机调节系统出现的迟缓、卡涩等问题进行了分析,确认是前轴承座角销(压板)及回油管存在缺陷,在机组启动过程中引导前轴承座向左前方偏移,造成转子偏心使前汽封右侧漏汽量增大,导致调节汽门杠杆、支架等受热膨胀不均。对滑销系统进行调整,排除了设备隐患,保证了机组正常运行。

Some problems,such as sluggish and jam,occurred in the steam turbine governing system. The problems were analyzed,and it was confirmed that there were defects in the front bearing seat angular pin( plate) and the oil return pipe. In unit startup process,the defects can lead the front bearing seat to shift to left front direction,which will cause the rotor to be offcenter,the steam leakage in front steam seal right side to increase,and the heating expansion of the lever and support of the governing valve to be uneven. The sliding key system was adjusted,the equipment hidden danger was eliminated,and the normal operation of the unit was ensured.