Method and apparatus for heat shielding gas turbine engines

A heat shield assembly for a gas turbine engine combustor, the combustor including a domeplate and at least one fuel injector extending through an opening in the domeplate, said heat shield assembly comprising:

• a heat shield coupled against a downstream side of said domeplate;
• a threaded collar extending upstream from said heatshield, said threaded collar received within said domeplate opening;
• a retainer coupled to said collar such that said domeplate is securely coupled between said heat shield and said retainer;
• a spacer coupled between said retainer and a domeplate upstream side, said spacer comprising a plurality of anti-rotation tabs, said anti-rotation tabs configured to extend through said domeplate and engage said heatshield to facilitate securely coupling said heat shield to said domeplate.

A gas turbine engine combustor comprising a combustion chamber comprising an inner liner and an outer liner, and a domeplate coupled to at least one of said inner and outer liners, said domeplate comprising a downstream side, an upstream side, and at least one opening extending therethrough for discharging cooling fluid therefrom for impingement cooling at least a portion of a heat shield assembly, said domeplate further comprises a groove formed in said domeplate upstream side, said heat shield assembly comprising:

• a heat shield coupled against said domeplate downstream side;
• a threaded collar extending upstream from said heatshield, said threaded collar received within said domeplate opening;
• a retainer coupled to said collar such that said domeplate is securely coupled between said heat shield and said retainer;
• and
• a spacer coupled between said retainer and a domeplate upstream side, said spacer comprising a plurality of radial alignment tabs received within said groove to facilitate securely coupling said heat shield to said domeplate.