抄録
A low pressure end blade for thermal power plant is one of the most important elements in a steam turbine design to determine the performance, the dimension and the number of casings of the turbine. Applying the state of the art technology for aerodynamic design and mechanical design, Mitsubishi Heavy Industries (MHI) has been conducting a developing program of new advanced low pressure end blades with ISB (ISB : Integral Shroud Blade) construction in order to enhance steam turbine efficiency and reliability. A series of these low pressure end blades has been completed for 50Hz and 60Hz unit application inclusive of 3600rpm 45 inch Titanium blade, and 1500/1800rpm 54 inch steel blade. And those blades have good operation experience more than 10 years. This paper reports on the up-to-date design technology applied for new advanced low pressure end blades and on the verification tests to ensure high efficiency and reliability of the blade.
