Steam turbine driving machine, as well as marine and gas liquefaction apparatus having a steam turbine driving machine

摘要

A steam turbine driver which enables using two shafts without increasing an installation space, and can further independently drive the two output shafts with a simple configuration is provided. A steam turbine driver (1A) includes: an ahead high-pressure turbine (7) driven upon supply of steam; a first drive shaft (4) driven by the ahead high-pressure turbine (7); an ahead first low-pressure turbine (11) and an ahead second low-pressure turbine (13) driven upon supply of steam discharged from the ahead high-pressure turbine (7); and a second drive shaft (14) driven by the ahead first low-pressure turbine (11) and the ahead second low-pressure turbine (13), the steam turbine driver further including a steam dump pipe (33) and a pressure reducing valve (35) that control a pressure of the steam discharged from the high-pressure turbine (7) and supplied to the first low-pressure turbine (11) and the second low-pressure turbine (13).