Optimization of the Front Shaft Seal Structure of the High Pressure Cylinder of 150MW Double Super Steam Turbine
The 150MW grade double super unit adopts an ultra-high temperature steam inlet method,and the leakage temperature of the front shaft seal of the high-pressure cylinder is relatively high.If the shaft seal structure is not designed properly,it will lead to safety accidents such as external leakage of the shaft seal steam,water coming in the bearing oil,deformation of the end cylinder,dynamic and static rubbing of the steam seal,or rotor bending.Moreover,large quantities of high-quality steam leakage can also affect the economic efficiency of the unit.By optimizing the structure of the front shaft seal of the high-pressure cylinder,calculating and analyzing dozens of combined models of steam leakage,coming up with reasonable operation methods,we solved the impact of high steam leakage temperature on the end steam seal,which achieved the expected effect and improved the economy.It has high application and promotion value in similar units.
front shaft seal of high-pressure cylinderhigh pressure balancing drumtemperature differenceheat rateeconomy
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