Patent ID: 8152448
Filing Date: 2012-04-10
Classification: F01D,F05D

Abstract:
1. A steam turbine comprising: a stationary section that includes a casing; a turbine rotor that includes a plurality of moving blade stages arranged in an axial direction, each of the moving blade stages being provided with a plurality of moving blades arranged in a circumferential direction, and rotatable provided in the casing; a plurality of nozzle diaphragms, wherein each of the nozzle diaphragms having a plurality of turbine nozzles arranged in the circumferential direction, arranged substantially coaxially with the turbine rotor by being supported on the stationary section; a steam passage formed with moving blade portions of the plurality of moving blade stages and turbine nozzle portions of the plurality of nozzle diaphragms; a nozzle box supported on the stationary section, wherein the nozzle box is arranged at an upstream side of the steam passage substantially coaxially with the turbine rotor; and a sealing that divides a space between the turbine rotor and the casing into a first space provided at an inner side of the nozzle box and a second space provided at an outer side of the nozzle box, the sealing being a bulkhead arranged between the nozzle box and the casing along an entire circumferential direction of the nozzle box.