JET ENGINE IGNITION DEVICE Russian patent published in 1999 - IPC

FIELD: aircraft industry; devices providing ignition of propellant and gaining nominal thrust. SUBSTANCE: jet engine ignition device has starting chamber 1 with ignition compound 2 and initiating means 3 arranged outside engine combustion chamber 4 and communicating with combustion chamber 4 through augmenter tube 5 with nozzle 7. Starting chamber 1 is secured on receiver 10 located in bell of jet engine nozzle 9 gas-coupled with combustion chamber 4 and provided with service holes 12. sealing unit is made between receiver 10 and jet engine nozzle 9 near its critical section. Geometry of totality of service holes 12 in receiver 10 and augmenter tube nozzle 7 is made to provide regulated gas dynamic compensation of force pushing out receiver 10 at starting jet engine by reactive forces of combustion products flow. Receiver 10 is fixed in bell of nozzle 9 by locking device. Tightness of sealing unit is provided by viscous lubricant 11 or low-melting substance 11 filling the clearance between subsonic part of jet engine nozzle 9 and receiver 10, receiver being installed in critical section of nozzle 9 to provide tight fitting. Diaphragm 16 is installed at cut of jet engine nozzle 9. Drum 13 with cables 14 passed over sheaves 15 is installed on receiver 10 for rotation. Cables 14 are fixed in bell of jet engine nozzle 9. Drum 13 comes into engagement with stops 18 made on diaphragm 16. Drum is furnished with loading and braking device. EFFECT: enhanced reliability of starting. 3 cl, 3 dwg