Gas turbine exhaust member, and exhaust chamber maintenance method

An exhaust chamber maintenance method for an exhaust chamber that includes:

• an outside diffuser;
• an inside diffuser disposed inside the outside exhaust diffuser, the inside diffuser being tubularly shaped and divided into two parts in a circumferential direction by horizontal dividing surfaces;
• a first seal housing being tubularly shaped is integrally formed in the circumferential direction, a front end of the first seal housing in an axial direction being coupled to a rear end of the inside diffuser in the axial direction;
• a second seal housing being tubularly shaped is integrally formed in the circumferential direction, a front end of the second seal housing in the axial direction being coupled to a rear end of the first seal housing in the axial direction;
• wherein the first seal housing and the second seal housing include:
• a recessed portion provided on one of the first seal housing and the second seal housing;
• and
• a protruding portion provided on the other of the first seal housing and the second seal housing, the protruding portion being slidably fitted into the recessed portion so as to allow the rear end of the first seal housing and the front end of the second seal housing to move relative to each other in the axial direction;
• and
• an inner cylinder that is tubularly shaped and divided into two parts in the circumferential direction, a front end of the inner cylinder in the axial direction being coupled to a rear end of the second seal housing in the axial direction, wherein the first seal housing, the second seal housing and the inner cylinder define a combustion gas flow path, and
• wherein a rear end of a rotating shaft disposed inside the inside diffuser is upstream of the first seal housing with respect a flow direction of the combustion gas,
• the exhaust chamber maintenance method comprising the steps of:
• releasing fastening of the dividing surfaces of the inside diffuser;
• releasing fastening between the inside diffuser and the first seal housing;
• and
• removing the dividing surfaces of the inside diffuser.

A gas turbine exhaust member comprising:

• an outside diffuser;
• an inside diffuser disposed in the outside diffuser, the inside diffuser being tubularly shaped and divided into two parts in a circumferential direction by horizontal dividing surfaces;
• a first seal housing, which is tubularly shaped and integrally formed in the circumferential direction, a front end of the first seal housing in an axial direction being coupled to a rear end of the inside diffuser in the axial direction;
• a second seal housing, which is tubularly shaped, is integrally formed in the circumferential direction, a front end of the second seal housing in the axial direction being coupled to a rear end of the first seal housing in the axial direction, wherein the first and second seal housings are disposed inside the outside diffuser;
• and
• an inner cylinder, which is tubularly shaped and divided into multiple parts in the circumferential direction, wherein a front end of the inner cylinder in the axial direction is coupled to a rear end of the second seal housing in the axial direction,
• wherein the first seal housing, the second seal housing, and the inner cylinder define a combustion gas flow path, and
• wherein the first seal housing and the second seal housing include:
• a recessed portion provided on one of the first seal housing and the second seal housing, and
• a protruding portion, which is slidably fitted into the recessed portion, provided on the other one of the first seal housing and the second seal housing so as to allow the rear end of the first seal housing and the front end of the second seal housing to move relative to each other in the axial direction.