DEVICE TO PROTECT ROCKET ENGINE NOZZLE AGAINST SEA WATER INGRESS (VERSIONS) Russian patent published in 2008 - IPC F02K9/97 F42B15/20 

FIELD: engines and pumps, physics.

SUBSTANCE: in compliance with the first version, the proposed device incorporates a power membrane deformed by a forced gas aspiration and arranged in the nozzle taper part between its plug and edge, resting upon the flexible carcass congruent with the nozzle taper part, a central fastener coupling with membrane with the plug and formed by a mushroom-like damper furnished with an annular lock and a pyrobolt. Its also comprises appropriate means designed to supercharge the membrane and allowing it to be screwed out. The said means comprising, a cold gas generator, as a self-contained power source, and a manifold allowing a directed aid effect on the said membrane and attached on to the nozzle edge. The power membrane represents a sleeve with a diameter making, at least, the nozzle edge diameter, and with a length making, at least, the nozzle taper part length. Note that the said membrane is made up of three separate layers, moving relative to each other, i.e. an outer sealing layer, an intermediate load-bearing layer and an inner thermal insulator layer, jointed together along the membrane edges. The aforesaid membrane one edge is clamped around the aforesaid damper foot and locked thereat. The membrane remaining part is laid along the nozzle inner surface to make, between itself and the nozzle wall, a supercharging gas passage. Finally, the membrane other end face is fastened along with the aforesaid carcass on to the manifold, the manifold orifices being directed towards the aforesaid gap between the nozzle and the layer. In compliance with the other version, the membrane thermal insulator layer is aligned with the carcass and makes a support for two other membrane layers to rule out sticking of the membrane to the nozzle plug.

EFFECT: higher reliability, ease of manufacture and mounting.

6 cl, 7 dwg