DEVICE FOR BREAKING DOWN ICE COVER Russian patent published in 2016 - IPC B63B35/08 B63G8/00 

FIELD: shipbuilding.

SUBSTANCE: invention relates to underwater vessels which break down ice using a resonance method. Device for ice breaking consists of a submarine vessel, capable of moving under ice cover and excite therein resonance flexural-gravity waves. Vessel has in water-flow channels between its strong and light two impellers, cross-sections of which are located perpendicular to longitudinal axis of vessel, they are located one after another and have in top parts open sections, impellers can rotate in opposite directions. Blade impellers at end of open channel sections are able to deviate, that is,can be held down to inner surface of impellers, for a time equal to time of approach to closed sections of next blades, after which they return into initial position. Blades of front and rear impellers are bent in directions opposite to direction of their rotation, and blades of rear impeller are further inclined to its rotation axis. Impellers are also configured to periodically with frequency of resonance flexural-gravity waves start and stop its rotation during time equal to half-period of said waves.

EFFECT: higher efficiency of ice breaking.

1 cl, 4 dwg