SHIP AIR PROPULSION COMPLEX Russian patent published in 2012 - IPC B63H7/02 

FIELD: transport.

SUBSTANCE: invention relates to ship building. proposed complex comprises guide nozzle, bucket wheel and circular grating. Bucket wheel is fitted aligned on drive shaft inside said nozzle. Grating is arranged on guide grating inlet. Grating is made up of radial vanes twisted along their lengthwise axes and arranged regularly along the circle. Said vanes features asymmetric profile. The number of vanes is multiple of two but may not be less that eight. Roots of said vanes are attached to grating hub while peripheral ends are secured to nozzle case. Chords of vane profile formed by cylindrical sections make angle varying along the radius. Said angle varies in wheel rotational direction from 0°-5° on peripheral end to 15°-30° on root end. Pair of vanes directed in opposite directions in circular grating is arranged along vertical. Length of said cords makes 0.8-1.5 of the distance between profiles along the circle in grating cylindrical section on radius equal to mean arithmetic distance between root and peripheral radii.

EFFECT: higher efficiency.

2 dwg