Repair method of plate member, plate member, combustor, ring segment, and gas turbine

摘要

A repair method of a plate member disposed so as to separate a high-pressure space and a low-pressure space and having a cooling passage provided inside thereof along a surface thereof, comprising: removing a damaged portion generated in the plate member so as to expose the cooling passage; primarily filling an area 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 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 through which the cooling passage communicates with the high-pressure space on a downstream side of the position where the cooling passage is blocked.

主权项

1. A repair method of a plate member disposed so as to separate a high-pressure space and a low-pressure space, the plate member having a cooling passage extending inside of the plate member, the repair method comprising the steps of:
removing a damaged portion in the plate member so as to expose the cooling passage, and forming a long hole which communicates with the cooling passage and at least one of the high-pressure space and the low-pressure space; primarily filling the long hole with a filling member made of a material different from that of the plate member, and form an external shape of the plate member having no missing portion as compared to an original external shape of the plate member; forming a first opening on the low-pressure space side of the plate member and through which the cooling passage is communicated with the low-pressure space on an upstream side of the filling member in a flow direction of a refrigerant flowing in the cooling passage; and forming a second opening on the high-pressure space side of the plate member and through which the cooling passage is communicated with the high-pressure space on a downstream side of the filling member in the flow direction of the refrigerant flowing in the cooling passage, wherein the filling member blocks the cooling passage to prevent the refrigerant flowing between the first opening and the second opening.