CARBON FIBREGLASS INSERT OF THE NOZZLE UNIT OF A SOLID ROCKET ENGINE WITH ADJUSTABLE EROSION RESISTANCE Russian patent published in 2022 - IPC F02K9/97 

FIELD: rocket technology.

SUBSTANCE: carbon fibreglass (CFG) insert with adjustable planned erosion resistance can be used in the nozzle unit of a solid-propellant rocket engine. The composition of the pressed plate of a CFG insert consists of consecutively alternating fractions of layers of silica and carbon fabrics or layers of fabric woven from fractions of carbon and silica threads impregnated with a grade A polymer binder FN, and by changing the ratio of fractions of carbon and silica fabrics or fractions of carbon and silica threads in the fabric woven from carbon and silica threads, allows for adjustment and production of compositions of various erosion resistance under the impact of the flow of rocket fuel combustion products, perpendicular to the layers of fabrics in the range from the erosion resistance of an insert made of pressed plates of silica fabrics to the erosion resistance of an insert made of pressed plates of carbon fabrics, since an increase in the proportion of carbon threads increases the erosion resistance of the insert in the nozzle unit of the rocket engine and, accordingly, a reduction in the proportion thereof contributes to a reduction in the erosion resistance.

EFFECT: creation of a CFG insert suitable for use in the nozzle unit of a solid rocket engine.

1 cl, 2 dwg