Repair method of plate-shaped member, plate-shaped member, burner, split ring, gas turbine

Abstract

A repair method of a plate member 3 disposed so as to separate a high-pressure space and a low-pressure space and having a cooling passage 7 provided inside thereof along a surface thereof, comprising: removing a damaged portion generated in the plate member 3 so as to expose the cooling passage 7; primarily filling an area 10 where a material is removed so as to block the cooling passage and form an external shape of the plate member having no missing portion as compared to its original external shape; forming a first opening 13 through which the cooling passage communicates with the low-pressure space on an upstream side, in a flow direction of a refrigerant in the cooling passage, of a position where the cooling passage is blocked; and forming a second opening 14 through which the cooling passage communicates with the high-pressure space on a downstream side of the position where the cooling passage is blocked.

Description

technical field [0001] The present invention relates to a method of repairing a plate-shaped member, a plate-shaped member, a combustor, a split ring, and a gas turbine including the plate-shaped member. Background technique [0002] The combustor of the gas turbine has a transition piece that sends high-temperature and high-pressure combustion gas to the turbine. [0003] The main body plate forming the transition piece has a structure that guides cooling air to the inside in order to prevent burnout caused by exposure to high-temperature combustion gas. Specifically, a plurality of cooling air passages extending in a direction along the axis of the transition piece are formed on the main body plate, and a cooling air passage opening to the outer peripheral side of the main body plate is formed on each of the plurality of cooling air passages. The air inlet and the cooling air outlet open to the inner peripheral side of the main body plate. The cooling air enters the cool...

AI Technical Summary

Problems solved by technology

[0008] However, in the above-mentioned repairing method, it is necessary to make a cover plate of an appropriate shape according to the shape of the crack to be repaired every time it is repaired. In addition, it is necessary to make the size of the groove correspond to the cover plate. Therefore, the work for forming the groove becomes less cumbersome

Therefore, the repair work takes a long time, and not only the construction period cannot be shortened, but also there is a problem that the repair cost increases

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