Lean burn injector with supply line switching

A lean burn fuel spray nozzle (FSN) 60 comprises a nozzle head 64 having a pilot fuel injector 70 with a pilot fuel injector outlet 71 and a main fuel injector 72 with a main fuel injector outlet 73. The FSN additionally comprises a feed arm 62 which provides pilot fuel from a pilot pipework 175 to...

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Bibliographische Detailangaben
Hauptverfasser:	Imon-Kalyan Bagchi, Michael R Smith
Format:	Patent
Sprache:	eng
Schlagworte:	AIR INTAKES FOR JET-PROPULSION PLANTS BLASTING COMBUSTION APPARATUS COMBUSTION ENGINES COMBUSTION PROCESSES CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS GAS-TURBINE PLANTS GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGHVELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MECHANICAL ENGINEERING WEAPONS
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Beschreibung
Zusammenfassung:	A lean burn fuel spray nozzle (FSN) 60 comprises a nozzle head 64 having a pilot fuel injector 70 with a pilot fuel injector outlet 71 and a main fuel injector 72 with a main fuel injector outlet 73. The FSN additionally comprises a feed arm 62 which provides pilot fuel from a pilot pipework 175 to the pilot fuel injector through a pilot fuel circuit 67 and main fuel from mains pipework 177 to the main fuel injector through a main fuel circuit 69. A switching device 74 may be upstream of the feed arm, and comprises a valve 180 adapted to switch between a Main On position, wherein the main fuel injector outlet is in fluid communication with the mains pipework through the main fuel circuit, and a Main Off position, wherein the main fuel injector outlet is not in fluid communication with the mains pipework through the main fuel circuit and main fuel is prevented to flow through the main fuel injector.