WATER-JET PROPULSION AND STEERING COMPLEX Russian patent published in 2005 - IPC

FIELD: shipbuilding; designing water-jet propellers with reversible steering complexes.

SUBSTANCE: proposed complex includes water conduit, water intake, impeller with fairing of hub mounted on shaft, nozzle with circular inlet section, straightening unit including hydrodynamic streamlined profiled stanchions used for securing the hub fairing to nozzle and reversible steering gear consisting of swivel deflector located behind nozzle; lower portion of water intake is made in form of semi-circular profiled attachment. Cross sections of nozzle have form of circle segments after its inlet circular section at each section along axis downward of flow. Longitudinal section of walls of semi-circular part of water intake and lower parts of nozzle which is extension of water intake have hydrodynamically streamlined shape in form of wing profile whose rectilinear side is directed inside water conduit. Straightening unit is formed by walls of propeller nozzle, said fairing and profiled stanchions. Reversible steering gear is equipped with bounding plate located horizontally immediately after nozzle exit section at level of its upper wall. Free edges of said plate adjoin inner surface of swivel deflector. Reversible steering gear is provided with at least two rudders provided with drives and located vertically on either side within width of nozzle outlet section; rudders are located under bounding plate on which their stocks are installed.

EFFECT: reduction of mass and overall dimensions; reduced amount of water in propulsor; extended field of application.

3 dwg