Controlled-leak combustor grommet
AssigneeSolar Turbines Incorporated
InventorsCrosby Hayhurst Johnson, Yong Weon Kim, Ted Edwin Groocock
Life of this patent
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Abstract
A grommet for a combustor of a gas turbine engine is disclosed. The grommet includes a lower platform and a raised platform. The lower platform includes a plurality of top slots located in the top surface and a plurality of bottom slots located in the bottom surface. Each top slot and bottom slot may extend radially along the lower platform. The plurality of top slots may be spaced equidistantly from one another along the circumference of the lower platform. The plurality of bottom slots may be spaced equidistantly from one another along the circumference of the lower platform.
Claims20
A grommet assembly for a combustion chamber of a gas turbine engine, the grommet assembly comprising:
- a retaining shroud including an upper annulus having an inner surface;
- a retaining nut coupled to the retaining shroud, the retaining nut including a covering portion having an inner surface;
- and a grommet including a lower annular platform having a top surface, a bottom surface opposite the top surface, an outer surface extending between the top surface and the bottom surface, a plurality of top grooves extending radially along the top surface of the lower annular platform, and a plurality of bottom grooves extending radially along the bottom surface of the lower annular platform, a cylindrical platform extending from the top surface of the lower annular platform, the cylindrical platform having an outer surface, at least a portion of the lower annular platform of the grommet extending between the retaining nut and the retaining shroud, the inner surface of the covering portion of the retaining nut and the outer surface of the cylindrical platform of the grommet defining an upper gap, and the outer surface of the lower annular platform of the grommet and the inner surface of the upper annulus of the retaining shroud defining a lower gap, the upper gap in fluid communication with the lower gap.
A combustion chamber of a gas turbine engine, the combustion chamber comprising:
- an outer liner and an inner liner, the outer liner and inner liner forming a combustion zone there between;
- a conduit inserted through the outer liner, the conduit having a channel in fluid communication with the combustion zone;
- a grommet assembly coupled to the conduit, the grommet assembly including a first fixture component including an upper annulus having an inner surface;
- a second fixture component coupled to the first fixture component, the second fixture component including a covering portion having an inner surface, a floating grommet including a lower annular platform having a top surface, a bottom surface opposite the top surface, an outer surface extending between the top surface and the bottom surface, a plurality of top grooves extending radially along the top surface of the lower annular platform, and a plurality of bottom grooves extending radially along the bottom surface of the lower annular platform, a cylindrical platform extending from the top surface of the lower annular platform, the cylindrical platform having an outer surface, at least a portion of the top grooves and at least a portion of the bottom grooves extending between the first fixture component and the second fixture component, the inner surface of the covering portion of the second fixture component and the outer surface of the cylindrical platform of the floating grommet defining an upper gap, and the outer surface of the lower annular platform of the floating grommet and the inner surface of the upper annulus of the first fixture component defining a lower gap, the upper gap in fluid communication with the lower gap.
A grooved cooling grommet for a conduit within a combustion chamber for a gas turbine engine, the grooved cooling grommet comprising:
- a lower annular platform having a top surface, a bottom surface opposite the top surface, an outer surface extending between the top surface and the bottom surface at an outer circumferential end of the lower annular platform, and an inner circumferential end, a collar extending from the top surface of the lower annular platform adjacent the inner circumferential end of the lower annular platform, the collar having an outer surface located at an outer circumferential end of the collar, the outer surface of the collar circumferentially offset from the outer surface of the lower annular platform, a plurality of top grooves located in the top surface of the lower platform and a plurality of bottom grooves located in the bottom surface of the lower platform, each top groove and bottom groove extending radially from the outer surface of the collar to the outer surface of the lower platform;
- and wherein the plurality of top grooves are spaced equidistantly from one another along the circumference of the lower platform, the plurality of bottom grooves are spaced equidistantly from one another along the circumference of the lower platform, and each top groove is circumferentially offset from an adjacent bottom groove.
Dependencies are inferred from the claim text.