# US 12,760,898 B2 · Combustor of gas turbine

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- Number: US 12,760,898 B2
- Document ID: US12760898B2
- Status: Granted
- Kind: B2
- Application number: 18/873,812
- Filed: 2023-08-09
- Published: 2025-11-27
- Granted: 2026-10-13
- Earliest claimed: 2022-06-16
- Assignees: Kawasaki Jukogyo Kabushiki Kaisha
- Applicants: Kawasaki Jukogyo Kabushiki Kaisha
- Inventors: Yoshihiko Ozaki; Ryusuke Matsuyama
- Web page: https://patentgrep.com/patent/US12760898B2

## CPC

- F23R 3/60: Support structures; Attaching or mounting means
- F23R 3/007: {constructed mainly of ceramic components}
- F05D 2260/38: by a spring, i.e. spring loaded or biased towards a certain position
- F23R 3/002: {Wall structures (F23R3/02 and F23R3/007 take precedence)}
- F23R 3/50: Combustion chambers comprising an annular flame tube within an annular casing (toroidal combustion chambers F23R3/52)
- F23R 2900/00017: Assembling combustion chamber liners or subparts
- F23R: GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS (fluidised bed combustion apparatus specially adapted for operation at superatmospheric pressures F23C10/16)
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS

## Abstract

A combustor of a gas turbine includes: a shell surrounding a combustion chamber; a liner located inside the shell and facing the combustion chamber; and a fixture by which the liner is attached to the shell. The fixture includes: a support including a shaft portion and a head portion, the shaft portion penetrating the shell, the head portion being connected to the shaft portion and supporting the liner from an inside of the shell in a radial direction; a fixing structure attached to the shaft portion of the support at an outside of the shell in the radial direction; a spacer interposed between the shell and the liner; and a biasing structure that biases the liner toward the inside in the radial direction to separate the liner from the shell in the radial direction and form a gap between the spacer and the shell in the radial direction.

## Claims

### Claim 1

A combustor of a gas turbine, the combustor comprising:
a shell surrounding a combustion chamber;
a liner located inside the shell and facing the combustion chamber;
a cooling space into which compressed air flows and which is located between the shell and the liner; and
a fixture by which the liner is attached to the shell, the fixture including
a support including a shaft portion and a head portion, the shaft portion penetrating the shell, the head portion being connected to the shaft portion and supporting the liner from an inside of the shell in a radial direction,
a spacer including a main body portion and a projecting portion, the main body portion being located between the shell and the liner, the projecting portion projecting from the main body portion toward an outside in the radial direction and penetrating the shell,
a fixing structure attached to the shaft portion of the support at an outside of the shell in the radial direction, and
a biasing structure that is located outside the shell in the radial direction and located inside the fixing structure in the radial direction, wherein:
the biasing structure includes
an elastic body,
an upper seat located outside the elastic body in the radial direction, and
a lower seat located inside the elastic body in the radial direction;
the upper seat and the lower seat include respective opposing surfaces which bypass the elastic body and are opposed to each other in the radial direction;
the projecting portion of the spacer contacts the upper seat;
the biasing structure biases the fixing structure toward the outside in the radial direction such that the liner approaches the shell in the radial direction against the compressed air flowing into the cooling space; and
when a pressure in the cooling space exceeds a predetermined pressure in a state where there is a gap between the opposing surface of the upper seat and the opposing surface of the lower seat, the liner moves toward an inside in the radial direction, the opposing surface of the upper seat and the opposing surface of the lower seat contact each other, and a gap is formed between the main body portion of the spacer and the shell.