WATER-JET ENGINE-PROPULSION COMPLEX Russian patent published in 2016 - IPC B63H1/00 B63H5/14 B63H25/42 

FIELD: shipbuilding.

SUBSTANCE: water-jet engine-propulsion system comprises axially symmetric body in form of ship annular nozzle accommodating motor stator and movably mounted circular ring. On inner side of circular ring are fixed blades, which are working wheel of propulsor. Circular ring is suspended on protected support-thrust structures. Water-jet engine-propulsion system is equipped with circular blade straightener, which is located after impeller and is installed in housing. Length of vanes is 0.5-0.6 times inner radius of circular ring, and impeller blades have length which is 0.6-0.8 times inner radius of circular ring. Number of vanes is greater than number of impeller blades by at least two units. Generatrix of inner surface of nose part of housing has a profile shape, which provides constant pressure downstream within at least 1/3 length of flow passage of propulsor.

EFFECT: higher efficiency, improved acoustic and vibration characteristics.

1 cl, 3 dwg