STEAM TURBINE EXHAUST CHAMBER COOLING DEVICE AND STEAM TURBINE

摘要

A steam turbine exhaust chamber cooling device includes a plurality of spray nozzles, and the plurality of spray nozzles inject spray water from an injection port to the turbine exhaust chamber. Here, a center line of the injection port is inclined with respect to a radial direction of a turbine rotor so that the plurality of spray nozzles inject the spray water in a direction counter to a rotation direction of the turbine rotor. An inclination angle α at which the center line of the injection port is inclined to a forward side of the rotation direction with respect to the radial direction of the turbine rotor is in a relationship represented by the following formula (A),;25°≦α≦45°  (A).

主权项

1. A steam turbine exhaust chamber cooling device for supplying spray water to a turbine exhaust chamber to which steam is exhausted from a turbine stage inside a casing housing a turbine rotor, the device comprising:
a plurality of spray nozzles for injecting the spray water from an injection port to the turbine exhaust chamber, wherein a center line of the injection port is inclined with respect to a radial direction of the turbine rotor so that the plurality of spray nozzles inject the spray water in a direction counter to a rotation direction of the turbine rotor; and an inclination angle α at which the center line of the injection port is inclined to a forward side of the rotation direction with respect to the radial direction of the turbine rotor is in a relationship represented by a following formula (A),
25°≦α≦45°  (A).