JET DEVICE Russian patent published in 2000 - IPC

FIELD: jet equipment. SUBSTANCE: jet device has a body with a mixing chamber and a diffuser, and an active nozzle and active medium flow governor in the form of a throttle needle installed in the body. The throttle needle positioning mechanism represents a worm-and-worm gear or gear set positioned in a housing installed inside the active nozzle, providing an alignment of the needle and nozzle. The active nozzle is made with an internal tapered section on the side of the mixing chamber, and at least three helical splines are made on the internal tapered section of the active nozzle. The splines in the active nozzle are made with a section area decreasing towards the mixing chamber, helical splines are made on the throttle needle, and the twist angles of the splines made on the active nozzle and throttle needle are the same, and the direction of their twisting coincides. EFFECT: enhanced reliability of operation and expanded range of control. 2 cl, 4 dwg