Patent ID: 9003803
Filing Date: 2015-04-14
Classification: F23R

Abstract:
1. A support structure for a burner tube in a combustor cap assembly for a gas turbine combustor comprising: an outer annular ring; an inner annular hub; and a plurality of struts extending radially between said outer annular ring and said inner annular hub, wherein an end of each strut is directly attached to an outer surface of the inner annular hub and an inner surface of the inner annular hub is configured to receive said burner tube; an annular piston ring groove formed in the inner surface of the inner annular hub, and a piston ring seated in the piston ring groove and adapted to receive and seal an inner end of the burner tube, the piston ring located radially between the inner annular hub and the burner tube; wherein said burner tube is radially outer to, and encircles, a fuel nozzle.