| 摘要 |
The system has a fuel feed arm 34 which, in use, extends inwardly from an outer casing 30 of combustion equipment of a gas turbine engine to a flame tube 32 of the combustion equipment. The feed arm ends in an injection nozzle 40 which penetrates a head of the flame tube to deliver fuel into the tube; the flame tube head including a swirler 42 which is arranged coaxially with the injection nozzle. The swirler has one or more air swirler circuits which produce respective flows of swirling air around the fuel delivered by the nozzle. The system further includes a seal ring 46 which seals the removable nozzle to the swirler. The seal ring has a flange portion 52, and the swirler has a pair of spaced retention grooves which may be in the form of lipped rails 50 at a front face 48. Opposite edges of the flange portion slidingly locate in the grooves such that the flange portion sealingly engages to the front face. The swirler also has a spring mechanism (54 Fig 5) which retains the flange portion in the grooves. |
