EJECTOR-NOZZLE DEVICE Russian patent published in 2007 - IPC B63H11/02 

FIELD: mechanical engineering.

SUBSTANCE: invention relates to production of ejector-nozzle devices for hydrojet engines. Proposed device contains fixed unit-faceplate with axially sectionalized spaces, each connected with mains with liquid or gas under pressure by channels and holes. Movable unit contains multinozzle head with shank-shaft installed in central hole of faceplate. Movable subassembly contains flexibly deformable bushing with screw-shaped slots, and head nozzles are provided with tube tips installed for rotation. Shank-shaft is mechanically coupled with electric or hydraulic drive. Ring chamber arranged in one of sectionalized spaces is connected with mains to supply gaseous explosive mixture. Blind hole-socket is found on faceplate at one diameter with other holes, being connected with ring chamber by channel on way of which check valve with primer and cutoff-meter in form of rectangular spring-loaded plate with fitted in jet are built in. Nose of meter is in sliding contact with face surface of head which is provided with segment slots on one diameter with meter, depth of said slots corresponds to opening-closing stroke of meter jet hole. Device in form of monoblock is mounted in fairing housing compartment to which thin walled bushing - ejector tube is connected by means of pylons. Walls of said tube are made of screw-shaped relatively engaging tape strips and they form contraction-diffuser outline of tube whose discharge end face is mechanically coupled with ring hydraulic cylinder. Fairing is secured on watercraft by means of pylon. Power supply main lines of device are connected with stationary power supply sources and watercraft control panel through tunnel channel in pylon.

EFFECT: increased efficiency.

8 dwg