Gas turbine combustor

Abstract

Provided is a gas turbine combustor having improved maintainability obtained by facilitating the mounting and removal of a base plate for supporting main burners and a pilot burner. A gas turbine combustor is provided with: a pilot burner disposed at the center of a combustor inner tube; main burners provided on the outside of the pilot burner in the radial direction so as to be arranged in the circumferential direction of the inner peripheral surface of the combustor inner tube; a circular disc-shaped base plate disposed within the combustor inner tube and supporting both the pilot burner and the main burners; and an engagement section protruding from the inner peripheral surface toward the inside thereof in the radial direction and engaging with the base plate. The base plate, and the engagement section or the inner peripheral surfaces are affixed by bolts.

1 - 4 . (canceled) 
     
     
         5 . A gas turbine combustor, comprising:
 a pilot burner disposed in a center of a combustor swirler basket;   a plurality of main burners disposed radially outside the pilot burner along a circumferential direction of an inner peripheral surface of the combustor swirler basket;   a base plate disposed inside the combustor swirler basket and supporting the pilot burner and the main burners; and   an engaging portion protruding radially inward from the inner peripheral surface and engaged with the base plate,   wherein the base plate has an upstream surface disposed upstream in a direction of flow of compressed air to be supplied in the combustor swirler basket, and   base plate and the engaging portion are fixed to each other with a bolt inserted from the upstream surface side.   
     
     
         6 . The gas turbine combustor according to  claim 5 , wherein
 the engaging portion is a bolt receiving portion having a streamlined shape along a direction of flow of compressed air to be supplied in the combustor swirler basket, and   the base plate and the bolt receiving portion are fixed to each other with the bolt.   
     
     
         7 . The gas turbine combustor according to  claim 5 , wherein
 the engaging portion is two annular protruding portions formed along the circumferential direction of the inner peripheral surface and disposed side by side in an axial direction of the combustor swirler basket, and   the base plate and the annular protruding portions are fixed to each other with the bolt with the base plate engaged between the annular protruding portions.   
     
     
         8 . A gas turbine combustor, comprising:
 a pilot burner disposed in a center of a combustor swirler basket;   a plurality of main burners disposed radially outside the pilot burner along a circumferential direction of an inner peripheral surface of the combustor swirler basket;   a base plate disposed inside the combustor swirler basket and supporting the pilot burner and the main burners; and   an engaging portion protruding radially inward from the inner peripheral surface and engaged with the base plate,   wherein the engaging portion is an annular step portion formed along the circumferential direction of the inner peripheral surface, and   an outer peripheral end surface of the base plate and the inner peripheral surface are fixed to each other with a bolt with the base plate and the annular step portion engaged with each other, the bolt being inserted from radially outside the combustor swirler basket at a position immediately below the annular step portion.