关键词: 核电机组, 半速汽轮机, 设备特点, 振动控制

Abstract:

The turbine of No.1 unit in Ningde CPR1000 PWR nuclear power plant (the capacity of 1000MW), is the first domestic half-speed turbine in China. The equipment features of half-speed turbine was analyzed, and some measures were proposed to control the vibration of the turbine from the aspect of installation, including the installation of second grounding embedded parts and sizing block, the parallelism adjustment of bearing bush, the adjustment of flow path clearance, the load distribution of HIP, the connection between LP and condenser, the spring release, the shafting alignment, the wheel diameter ream connection, and other processes. The actual operation of the unit shows that the improvement is obvious after the implementation of these measures, with which the maximum shaft vibration is 40.0 μm and the maximum vibration speed of bearing bush is 1.42 mm/s, both of the two indices can meet the standard requirements.

Key words: nuclear power unit, half-speed turbine, equipment features, vibration control