Patent ID: 9492906
Filing Date: 2016-11-15
CPC Classification: B08B,B24C,F01D

Claim Text:
1. A method for cleaning a machine stage of a gas turbine, the gas turbine including a plurality of machine stages, each machine stage including a rotor and a plurality of blades, the rotor being rotatable around a rotor axis defining an axial direction parallel to the rotor axis and a radial direction perpendicular to the rotor axis, the blades being radially oriented and mounted on the rotor and configured to revolve around the rotor axis, the method comprising the following steps: providing a sublimable material, wherein the sublimable material is dry ice; introducing a cleaning nozzle through an opening in an outer wall of the gas turbine and into the machine stage, the cleaning nozzle including, acting on the blades of the machine stage by directing a jet including solid particles of the sublimable material from the nozzle opening of the cleaning nozzle in the jet outlet direction against the blades.