US 9,810,430 B2
Conjoined grommet assembly for a combustor
Jonathan P. Sandoval, Hebron, CT (US); and Randolph J. Smith, Ellington, CT (US)
Assigned to United Technologies Corporation, Farmington, CT (US)
Filed by United Technologies Corporation, Hartford, CT (US)
Filed on Dec. 23, 2014, as Appl. No. 14/581,568.
Claims priority of provisional application 61/920,227, filed on Dec. 23, 2013.
Prior Publication US 2015/0323182 A1, Nov. 12, 2015
Int. Cl. F23R 3/06 (2006.01); F23R 3/00 (2006.01); F23R 3/02 (2006.01)
CPC F23R 3/02 (2013.01) [F23R 3/002 (2013.01); F23R 3/005 (2013.01); F23R 3/06 (2013.01); F23R 2900/03041 (2013.01); F23R 2900/03044 (2013.01); Y02T 50/675 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A combustor assembly for a combustor, comprising:
a plurality of grommet assemblies, each grommet assembly including
a first grommet defining at least in-part a first dilution hole; and
a second grommet defining at least in-part a second dilution hole and in contact with the first grommet;
a combustor heat shield including a hot side and an opposite cold side;
a combustion chamber defined at least in-part by the combustor heat shield; and
a shell spaced from and opposing the cold side with a cooling cavity defined between the cold side and the shell and containing at least in part the first and second grommets;
where the first grommet is joined to the combustor heat shield and defines at least in part the first dilution hole communicating through the combustor heat shield;
where the second grommet is joined to the first grommet and the combustor heat shield and defines at least in-part the second dilution hole communicating through the combustor heat shield;
where each grommet assembly is contained at least in part within the cooling cavity;
where the combustor heat shield is substantially cylindrical and concentric to an axis of the combustor; and
wherein the plurality of grommet assemblies are joined and extend circumferentially continuously within the cooling cavity so that air within an upstream portion of the cooling cavity is prevented from flowing into a downstream portion of the cooling cavity by the plurality of grommet assemblies.