Gas Turbine Combustion Chamber (Hitachi)

CATEGORY: GAS TURBINES
PATENT
Gas Turbine Combustion Chamber (Hitachi)
Inventors:
Sekihara, Masaru (Tokyo, JP)
Ichikawa, Kunihiro (Tokyo, JP)
Application Number: 14/079920
Publication Date: 06/05/2014
Assignee: Hitachi, Ltd. (Tokyo, JP)
United States Patent Application 20140150453
Abstract:
A gas turbine combustion chamber is provided, including a flow sleeve structure with an improved anti-vibration performance. A gas turbine combustion chamber of the present invention includes a liner, a transition piece, and a flow sleeve including a plurality of segments and integrated by welding a tie piece along joint portions of the segments. The tie piece includes a first member and a second member, the first member continuously extending along a longitudinal direction of the joint portions of the segments and being arranged to cover the joint portions, and the second member being formed at an end portion of the first member, having a width wider than the first member, and including a recess.
FIELD OF THE INVENTION
The present invention relates to a combustion chamber that is a constituent element of a gas turbine and, particularly, relates to a flow sleeve structure housing a transition piece therein.
BACKGROUND OF THE INVENTION
A transition piece, which is a component of a gas turbine combustion chamber, generally has a shape that connects a cylindrical liner and a turbine passage that is an annular passage. Moreover, a flow sleeve is arranged around the transition piece to form a passage for inducing discharged air from a compressor to the liner between an outer surface of the transition piece and the flow sleeve.
This flow sleeve has a structure to house the complex transition piece, so that it often employs a structure in which a tie piece is welded to joint faces of half-section structures to join the half-section structures together. Moreover, in the combustion chamber of the gas turbine, a small vibration may be involved at the time of combustion. Therefore, it is desirable to optimize the shape of the tie piece because fatigue damage maybe produced at a welded portion due to the vibration. Examples of the tie piece structure generally include a band-plate-shaped tie piece having a recess at the end portion thereof that is irregularly different in the width as is disclosed in JP 2007-285692, and a rectangular-plate-shaped tie piece which has a recess separately provided.
However, it is conceivable that the technique in JP 2007-285692 needs a more effective anti-vibration structure because the structure disclosed in JP 2007-285692 may be insufficient when future increases in the pressure ratio and output are taken into consideration.
The object of the present invention is to provide a gas turbine combustion chamber including a flow sleeve structure with an improved anti-vibration performance.
SUMMARY OF THE INVENTION
In order to attain the above-mentioned object, a gas turbine combustion chamber according to the present invention includes a liner, a transition piece, and a flow sleeve including a plurality of segments and integrated by welding a tie piece along joint portions of the segments. The tie piece includes a first member and a second member, the first member continuously extending along a longitudinal direction of the joint portions of the segments and being arranged to cover the joint portions, and the second member being formed at an end portion of the first member, having a width wider than the first member, and including a recess.
According to the present invention, it is possible to provide a gas turbine combustion chamber including a flow sleeve structure with an improved anti-vibration performance.
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