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

摘要

The purpose of the present invention is to provide a single casing steam turbine with which a decline in the performance of a high pressure blade row can be suppressed and to provide a single shaft combined cycle power generation apparatus in which the single casing steam turbine is used. This steam turbine (3) is a single casing steam turbine comprising a high pressure blade row (22) and a low pressure blade row (26) and is provided with: a high/intermediate pressure chamber (10) in which the high pressure blade row (22) is accommodated; a low pressure chamber (12) in which the low pressure blade row (26) is accommodated; and an expansion joint (30) that joins the high/intermediate pressure chamber (10) and the low pressure chamber (12) and also hermetically seals an internal space (31) of the high/intermediate pressure chamber (10) and the low pressure chamber (12).