Gas turbine with an air bleeder tube

Patent metadata

Field	Value
Publication number	US-9650966-B2
Application number	US-201213977172-A
Country	US
Kind code	B2
Filing date	Jan 31, 2012
Priority date	Feb 25, 2011
Publication date	May 16, 2017
Grant date	May 16, 2017

Abstract

A gas turbine provided with an air bleeder tube ( 1 ) that, during startup, bleeds a portion of the compressed air of a compressor from the compressor and discharged the bled air into a cylindrical exhaust duct ( 20 ), wherein the air bleeder tube ( 1 ) is disposed at a portion that does not obstruct the flow of the main flow of combustion gas.

First claim

The invention claimed is:

1. A gas turbine having a compressor, the gas turbine comprising:
an exhaust diffuser;
an exhaust duct connected to a downstream side of the exhaust diffuser; and
an air bleeder tube that guides a portion of compressed air bled from said compressor at a startup timing into the exhaust duct, wherein an outlet of the air bleeder tube is configured to direct the portion of the compressed air downstream of the exhaust diffuser,
wherein the compressed air bled from the compressor is discharged into the exhaust duct arranged on the downstream side of the exhaust diffuser, and connected directly to the exhaust diffuser,
wherein a main flow of combustion gas is not obstructed by an arrangement of said air bleeder tube, and
wherein said air bleeder tube is passed through an inside of a structural element connected to a bearing for supporting a rotor.

2. A gas turbine as claimed in claim 1 , said gas turbine characterized in that the outlet of said air bleeder tube is arranged at a lower outer peripheral portion of the structural element connected to the bearing for supporting the rotor.

3. A gas turbine having a compressor, the gas turbine comprising:
an exhaust diffuser;
an exhaust duct connected to a downstream side of the exhaust diffuser;
an air bleeder tube that guides a portion of compressed air bled from said compressor at a startup timing into the exhaust duct, wherein an outlet of the air bleeder tube is configured to direct the portion of the compressed air downstream of the exhaust diffuser; and
three structural elements connected to a bearing for supporting a rotor, wherein said three structural elements are arranged in an invert Y shape along a peripheral direction of a rotor and said air bleeder tube is passed through an inside of said three structural elements,
wherein the compressed air bled from the compressor is discharged into the exhaust duct arranged on the downstream side of the exhaust diffuser, and connected directly to the exhaust diffuser, and
wherein a main flow of combustion gas is not obstructed by an arrangement of said air bleeder tube.

Assignees

• Sakamoto Yasuro
• Ito Eisaku
• Wakazono Susumu
• Ishizaka Koichi
• Machida Yukinori
• Mitsubishi Hitachi Power Sys

Inventors

• Sakamoto Yasuro
• Ito Eisaku
• Wakazono Susumu
• Ishizaka Koichi
• Machida Yukinori

Classifications

• F05D2250/12

  rectangular · CPC title

• F02C9/52

  by bleeding or by-passing the working fluid · CPC title

• F05D2260/606

  Bypassing the fluid · CPC title

• F01D25/305

  with fluid, e.g. liquid injection · CPC title

• F02C7/20

  Mounting or supporting of plant; Accommodating heat expansion or creep · CPC title