Patent ID: 9624788
Date: 2017-04-18
CPC Classifications: F01D,F02C

Claim:
1. A purging device which ejects air into a turbine casing of a gas turbine to prevent deformation in the turbine casing when the gas turbine is in a stop state, the purging device comprising: an air compressor which supplies the air; a buffer tank including a partition wall configured to partition an interior of the buffer tank into a first air chamber having a first volume and a second air chamber having a second volume less than the first volume, wherein the air flows into the first air chamber such that a first portion of the air is within the first air chamber at a first pressure, wherein the partition wall is provided with a through hole to communicate a second portion of the air from the first air chamber to within the second air chamber at a second pressure lower than the first pressure; a stagnation part agitation air ejecting part provided with at least one stagnation part agitation air opening facing a stagnation part where gas flow stagnates in the turbine casing and configured to eject the first portion of the air from the first air chamber through the stagnation part agitation air opening as stagnation part agitation air; an overall agitation air ejecting part provided with a plurality of overall agitation air openings facing a portion in the turbine casing different from the at least one stagnation part and configured to eject the second portion of the air from the second air chamber through the plurality of overall agitation air openings as overall agitation air, to agitate gas held in an upper space of the turbine casing.