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Damage-repairing method of transition piece and transition piece

A transitional, post-repair technology, applied in the direction of combustion methods, support elements for blades, lighting and heating equipment, capable of solving difficult-to-apply repairs, etc.

Inactive Publication Date: 2012-07-25
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In the above-mentioned conventional repair by diffusion brazing, compared with welding repair, problems such as deformation of the base material can be avoided, but it is difficult to apply to a wide range of repairs such as thinning, creep holes, etc.

Method used

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  • Damage-repairing method of transition piece and transition piece
  • Damage-repairing method of transition piece and transition piece
  • Damage-repairing method of transition piece and transition piece

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no. 1 approach

[0040] figure 1 FIG. 3 is a diagram illustrating a configuration of a gas turbine 100 including a transition section 10 to which the transition section damage repair method according to the first embodiment of the present invention is applied, in partial cross section.

[0041] Such as figure 1 As shown, the gas turbine 100 includes: a compressor 110 that compresses external air; and a combustor liner 120 that mixes and combusts air and fuel pressurized by the compressor 110 . The gas turbine 100 further includes: a transition section 10 that guides combustion gas generated in the combustor liner 120 to a gas turbine section 130 ; and a gas turbine section 130 that is driven to rotate by the combustion gas introduced through the transition section 10 .

[0042] The compressor 110 includes a compressor rotor 113 in which buckets 112 are implanted in a compressor housing 111 . A plurality of moving blades 112 are planted along the circumferential direction, and form multi-stag...

no. 2 approach

[0094] The method of repairing damage to the transition section according to the second embodiment adds a step of removing damage to the method of repairing damage to the transition section according to the first embodiment. In addition, since the oxide film is also removed when the damage is removed, the step of removing the oxide film in the method for repairing the damage of the transition section according to the first embodiment is not included. Here, process parts different from the damage repair method of the transition section of the first embodiment will be mainly described.

[0095] Figure 13 It is a flow chart for explaining the process of the damage repair method of the transition section which concerns on the 2nd Embodiment of this invention. Figure 14 ~ Figure 17 It is a figure for explaining the process of the damage repair method of the transition piece concerning 2nd Embodiment of this invention, and shows a part of the cross section of the inner cylinder 2...

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Abstract

A damage-repairing method of a transition piece in an embodiment includes; an oxide removing step of removing an oxide on an outer surface 20b of an inner duct 20 of a transition piece 10 having damage; a repair material placing step of placing a brazing repair material 80 on the outer surface 20b of the inner duct 20 so as to cover the damage; and a diffusion brazing step of diffusion heat treating the inner duct 20 to repair the damage formed in the outer surface 20b. The damage-repairing method of the transition piece includes: a pressurized heat treating step of, under high pressure, heat treating the inner duct 20; a surface finishing step of scraping off the brazing repair material 80 projecting from the outer surface 20b; and a non-pressurized heat treating step of solution heat treating and aging heat treating the inner duct 20 under non-pressure.

Description

[0001] This application is based on Japanese Patent Application No. 2011-011858 for which it applied on January 24, 2011, and claims the priority of this patent application, The content of this priority document is incorporated in this invention by reference. technical field [0002] The present invention relates to a damage repair method for a transition piece of a gas turbine, and a transition piece repaired by the damage repair method. Background technique [0003] In a gas turbine power plant, compressed air and fuel compressed by the drive of a compressor installed coaxially with the gas turbine are introduced into a combustor and combusted in a combustion chamber of a combustor liner. The high-temperature combustion gas generated by combustion is introduced into a gas turbine unit composed of stationary blades and rotor blades through a transition section, and expands to drive the rotor blades to rotate. In a gas turbine power plant, the kinetic energy generated by thi...

Claims

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Application Information

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IPC IPC(8): B23P6/00B23K1/00F23R3/00
CPCF01D5/005F05B2230/80F01D9/023B23K1/0018F05D2230/80B23K2201/001B23K2101/001
Inventor 伊藤胜康斋藤大藏酒井义明
Owner KK TOSHIBA