Axially staged fuel injector assembly mounting

Abstract

The present disclosure is directed to a system for mounting an axially staged fuel injector assembly. The system includes an annularly shaped liner that at least partially defines a hot gas path of a combustor. The liner defines an injector opening that extends radially through the liner. A flow sleeve circumferentially surrounds at least a portion of the liner and is radially spaced from the liner to form a cooling flow annulus therebetween. An annular injector boss extends radially from the liner through the flow sleeve. The injector boss includes a first end portion that extends circumferentially about the injector opening and a second end portion that is disposed radially outwardly from an outer surface of the flow sleeve. The injector boss is formed to receive a fuel injector. The present disclosure is also directed to a method for mounting an axially staged fuel injector.

What is claimed is: 
     
         1 . A system for mounting an axially staged fuel injector, comprising:
 an annularly shaped liner at least partially defining a hot gas path of a combustor, wherein the liner defines an injector opening that extends radially through the liner;   a flow sleeve circumferentially surrounding at least a portion of the liner, wherein the flow sleeve is radially spaced from the liner to form a cooling flow annulus therebetween; and   an annular injector boss extending radially from the liner through the flow sleeve, the injector boss having a first end portion that extends circumferentially about the injector opening and a second end portion disposed radially outwardly from an outer surface of the flow sleeve, wherein the injector boss is formed to receive a fuel injector.   
     
     
         2 . The system as in  claim 1 , further comprising a support plate disposed radially outwardly from the outer surface of the flow sleeve, wherein the support plate extends circumferentially around the injector boss, wherein the support plate includes an inner portion that extends into a slot defined by the injector boss. 
     
     
         3 . The system as in  claim 2 , wherein the support plate comprises a first plate and a second plate, wherein an inner portion of the first plate and an inner portion of the second plate extend within the slot defined by the injector boss. 
     
     
         4 . The system as in  claim 2 , further comprising a doubled ended stud, wherein a first end of the double ended stud is threadingly engaged with the support plate and a second end of the doubled ended stud extends radially through a mounting hole defined by the fuel injector. 
     
     
         5 . The system as in  claim 2 , further comprising a support plate cap having an inner side, an outer side and a pocket defined along the inner side, wherein at least a portion of the support plate is seated within the pocket. 
     
     
         6 . The system as in  claim 5 , wherein the support plate cap is fixedly connected to the flow sleeve. 
     
     
         7 . The system as in  claim 5 , wherein the support plate cap is sealed against the outer surface of the flow sleeve. 
     
     
         8 . The system as  claim 5 , wherein the support plate cap defines a plurality of fastener holes, wherein each fastener hole is coaxially aligned with a respective fastener opening defined by the support plate and a mounting hole defined by the axially staged fuel injector. 
     
     
         9 . The system as in  claim 5 , further comprising a doubled ended stud that extends from the support plate through the support cover and through a mounting hole defined by the fuel injector, wherein a first end of the double ended stud is threadingly engaged with the support plate and a second end of the doubled ended stud is threadingly engaged with a nut. 
     
     
         10 . A system for mounting an axially staged fuel injector, comprising:
 an annularly shaped liner at least partially defining a hot gas path of a combustor, wherein the liner defines a injector boss opening that extends radially through the liner;   a flow sleeve circumferentially surrounding at least a portion of the liner, wherein the flow sleeve is radially spaced from the liner to form a cooling flow annulus therebetween; and   an annular injector boss coaxially aligned with the injector opening and extending radially from the liner through the flow sleeve, the injector boss having a first end portion fixedly connected to the liner and a second end portion disposed radially outwardly from an outer surface of the flow sleeve, wherein the injector boss is formed to receive a fuel injector.   
     
     
         11 . The system as in  claim 10 , further comprising a support plate disposed radially outwardly from the outer surface of the flow sleeve, wherein the support plate extends circumferentially around the injector boss, wherein the support plate includes an inner portion that extends into a slot defined by the injector boss. 
     
     
         12 . The system as in  claim 11 , wherein the support plate comprises a first plate and a second plate, wherein an inner portion of the first plate and an inner portion of the second plate extend within the slot defined by the injector boss. 
     
     
         13 . The system as in  claim 11 , further comprising a doubled ended stud, wherein a first end of the double ended stud is threadingly engaged with the support plate and a second end of the doubled ended stud extends radially through a mounting hole defined by the fuel injector. 
     
     
         14 . The system as in  claim 11 , further comprising a support plate cap having an inner side, an outer side and a pocket defined along the inner side, wherein at least a portion of the support plate is seated within the pocket. 
     
     
         15 . The system as in  claim 14 , wherein the support plate cap is fixedly connected to the flow sleeve. 
     
     
         16 . The system as in  claim 15 , wherein the support plate cap is sealed against the outer surface of the flow sleeve. 
     
     
         17 . The system as  claim 15 , wherein the support plate cap defines a plurality of fastener holes, wherein each fastener hole is coaxially aligned with a respective fastener opening defined by the support plate and a mounting hole defined by the axially staged fuel injector. 
     
     
         18 . The system as in  claim 15 , further comprising a doubled ended stud that extends from the support plate through the support cover and through a mounting hole defined by the fuel injector, wherein a first end of the double ended stud is threadingly engaged with the support plate and a second end of the doubled ended stud is threadingly engaged with a nut. 
     
     
         19 . A method for mounting an axially staged fuel injector, comprising:
 inserting a support plate into a slot defined along a side wall of a second end portion of an injector boss, wherein the second end portion is disposed radially outwardly from an outer surface of the flow sleeve;   placing a support plate cap over the support plate;   threading a first end of a double ended stud into a fastener opening defined by the support plate, wherein the double ended stud extends through the support plate cap;   inserting a fuel injector into the injector boss, wherein a second end of the double ended stud extends through a mounting hole defined by the fuel injector; and   securing the fuel injector to the support plate cap via a nut threadingly engaged with the second end of the double ended stud.