SINGLE-CASING STEAM TURBINE AND SINGLE-SHAFT COMBINED-CYCLE POWER GENERATION APPARATUS

摘要

It is intended to provide a single-casing steam turbine and a single-shaft combined-cycle power plant using the steam turbine that are capable of suppressing the performance decline of the high-pressure blade rows. A steam turbine 3 is a single-casing steam turbine having high-pressure blade rows 22 and low-pressure blade rows 26 and includes a high/intermediate-pressure chamber 10 housing the high-pressure blade rows 22, a low-pressure chamber 12 housing the low-pressure blade rows 26, and an expansion joint 30 for connecting the high/intermediate-pressure chamber 10 and the low-pressure chamber 12 and for sealing an interior space 31 of the high/intermediate-pressure chamber 10 and the low-pressure chamber 12.