FIELD: machine building.
SUBSTANCE: fuel injection device for annular combustion chamber of turbo-machine comprises the primary system continuously feeding the injector, opening into the first Venturi tube, and multipoint system discontinuously feeding the injector holes. The injector holes are made on a frontal surface of the ring rim installed in the annular chamber, second tube, formed upstream the second Venturi tube, coaxially with reference to the first Venturi tube and enclosing the latter. The fuel injection device comprises the thermal isolation of frontal surface of the ring rim with an annular cavity, formed around injector holes between the frontal surface of the ring rim and the frontal wall of the annular chamber and intended for filling during operation with air or coked fuel.
EFFECT: invention is aimed at simplification of the fuel injection device with simultaneous improvement of its profitability and efficiency.
11 cl, 9 dwg
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