Combustor front assembly for a gas turbine

Abstract

A combustor front assembly for a gas turbine power plant, wherein the combustor front assembly is provided with at least a through hole for allowing gas flow into a combustion chamber, the combustor front assembly having a combustor front plate with at least a through hole and with an outer surface outside the combustor chamber; a combustor front segment having a through hole and coupled with the outer surface of the combustor front plate so that the through hole of the front segment is aligned with the through hole of the front plate; wherein the combustor front segment is clamped in position and forced against the outer surface of the combustor front plate.

1 . Combustor front assembly configured for a gas turbine power plant, wherein the combustor front assembly comprises:
 at least a through hole for allowing gas flow into a combustion chamber;
 a combustor front plate having at least a through hole and an outer surface outside the combustor chamber; and 
 at least a combustor front segment having a through hole and coupled with the outer surface of the combustor front plate so that the through hole of the front segment is aligned with the through hole of the front plate; wherein the combustor front segment is clamped in position and forced against the outer surface of the combustor front plate. 
   
     
     
         2 . The combustor front assembly as claimed in  claim 1 , in combination with a gas turbine which comprises:
 a rotor having an axis, the combustor front plate being ring-shaped around the axis;   the combustor front plate including a plurality of through holes equally spaced along the front plate; and   the combustor front assembly including a plurality of combustor front segments which are tile-shaped, covering an entire outer surface of the combustor front plate.   
     
     
         3 . The combustor front assembly as claimed in  claim 2 , wherein each combustor front segments comprises:
 a front wall spaced and parallel to the outer surface of the combustor front plate; and   two opposite side walls which are L-shaped, having a first portion, orthogonal to the outer surface of the combustor front plate and connected with the front wall, and a second portion spaced and parallel to the front wall, the second portion of the side walls of the combustor front segments being clamped and pushed against the outer surface of the combustor front plate.   
     
     
         4 . The combustor front assembly as claimed in  claim 3 , wherein each combustor front segment comprises:
 two side clamping strips having lengths equal to the side walls acting on the second portion of the side walls inside the combustor front segments.   
     
     
         5 . The combustor front assembly as claimed in  claim 4 , wherein each combustor front segment comprises:
 two side closing strips facing the side clamping strips for clamping a free end of the second portion of the side walls between the side clamping strips and the side closing strips.   
     
     
         6 . The combustor front assembly as claimed in  claim 1 , wherein each combustor front segment comprises:
 a front wall spaced and parallel to the outer surface of the combustor front plate;   an outer wall and an inner wall, each L shaped and having a first portion, orthogonal to the outer surface of the combustor front plate and connected with the front wall, and a second portion spaced and parallel to the front wall; the second portion of the outer and inner walls of the combustor front segment being clamped and pushed against the outer surface of the combustor front plate.   
     
     
         7 . The combustor front assembly as claimed in  claim 6 , wherein each combustor front segment comprises:
 an inner clamping plate and an outer clamping plate arranged in a middle of the outer and inner walls acting on the second portion of the outer and inner walls inside the combustor front segments.   
     
     
         8 . The combustor front assembly as claimed in  claim 7 , wherein each of the combustor front segments comprises:
 inner and outer closing strips facing the inner and an outer clamping plates for clamping a free end of the second portions of the outer and inner walls between the clamping plates and the inner and outer closing strips.   
     
     
         9 . The combustor front assembly as claimed in  claim 8 , wherein the clamping plates are in abutment against a step seat realized in an inner surface of the through hole of the front segment. 
     
     
         10 . The combustor front assembly as claimed in  claim 8 , wherein the inner and outer closing strips and the side closing strips are integral each other to form a single square frame. 
     
     
         11 . The combustor front assembly as claimed in  claim 1 , comprising:
 a seal between the combustor front segment and the outer surface of the combustor front plate.   
     
     
         12 . The combustor front assembly as claimed in  claim 11 , wherein the seal is a rope seal housed in a perimetric groove realized in the outer surface of the combustor front plate. 
     
     
         13 . The combustor front assembly as claimed in  claim 11 , wherein the outer surface of the combustor front plate is formed of straight portions. 
     
     
         14 . A gas turbine power plant in combination with the combustor front assembly as claimed in  claim 1 , the gas turbine power plant comprising:
 a rotor arranged for rotating around an axis;   a compressor coupled to the rotor and arranged in an upstream location for compressing air;   an annular combustion chamber configured for mixing compressed air with fuel and burnt in order to generate an high pressure gas; and   a turbine arranged in a downstream location if the rotor and coupled to the rotor wherein high pressure gas will expand performing work on the rotor, the annular combustion chamber being arranged concentrically to the axis and including a combustor front assembly coupled with a plurality of burners.   
     
     
         15 . Gas turbine power plant as claimed in  claim 14 , wherein the burners are EV-burners or AEV-burners. 
     
     
         16 . A gas turbine power plant in combination with the combustor front assembly as claimed in  claim 5 , the gas turbine power plant comprising:
 a rotor arranged for rotating around an axis;   a compressor coupled to the rotor and arranged in an upstream location for compressing air;   an annular combustion chamber configured for mixing compressed air with fuel and burnt in order to generate an high pressure gas; and   a turbine arranged in a downstream location if the rotor and coupled to the rotor wherein high pressure gas will expand performing work on the rotor, the annular combustion chamber being arranged concentrically to the axis and including a combustor front assembly coupled with a plurality of burners.   
     
     
         17 . A gas turbine power plant in combination with the combustor front assembly as claimed in  claim 9 , the gas turbine power plant comprising:
 a rotor arranged for rotating around an axis;   a compressor coupled to the rotor and arranged in an upstream location for compressing air;   an annular combustion chamber configured for mixing compressed air with fuel and burnt in order to generate an high pressure gas; and   a turbine arranged in a downstream location if the rotor and coupled to the rotor wherein high pressure gas will expand performing work on the rotor, the annular combustion chamber being arranged concentrically to the axis and including a combustor front assembly coupled with a plurality of burners.