| 摘要 |
PROBLEM TO BE SOLVED: To cool the bleed air of a high temperature by a simple structure and enable the cooled bleed air to be used for cooling and sealing bearings. SOLUTION: In a gas turbine, a rotary shaft 105 supports a compressor 101 and a turbine 102 and the rotary shaft 105 is rotatably supported by the bearings 106, 107. The bleed air a extracted from the compressor 101 is fed to the bearings 106, 107 through pipes 121, 122 and 123 for cooling and sealing the bearings 106, 107. When a pressure ratio of the compressor 101 is high, the temperature of the bleed air a is high. A part of the bleed air pipe 121 is therefore disposed in an intake duct 103. By this arrangement, the cooling part 121a of the bleed air pipe disposed in the intake duct 103 contacts with the air A of a large volume and high speed and is cooled so that the bleed air a can be effectively cooled. COPYRIGHT: (C)2008,JPO&INPIT
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