ICE BREAKER FOR OPERATION IN SHALLOW FREEZING SEA AREAS Russian patent published in 2015 - IPC B63B35/08 B63H5/08 

Abstract RU 2549739 C1

FIELD: transport.

SUBSTANCE: invention relates to ship building, particularly, to ice breaker vessels and pusher tug to be operated in shallow iced areas. Ice breaker comprises hull with sledge-type stern counter and steering mover complex arranged in the latter and including two paddle propulsors arranged on sides as well as two whirligig steering columns provided with two propeller screws and arranged in symmetry about the ice breaker centre line. Stern counter at structural waterline area features ice breaking shape with expressed wedge-shape with taper angle in waterline making 90-180 degrees and with surface inclined to vertical , at least 30 degrees. Ice-protection nose is formed in stern counter perimeter, features wedge-like cross-section and does not extend beyond ship hull. Said nose extends in fore direction beyond the screw propeller disc plane by magnitude not exceeding two diameters of said propulsors. This nose features height whereat its bottom edge at stern is spaced from rotational axes of screw propellers by at least half the radius of said propellers.

EFFECT: better manoeuvrability in ice.

3 dwg

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RU 2 549 739 C1

Authors

Appolonov Evgenij Mikhajlovich

Sazonov Kirill Evgen'Evich

Beljashov Valerij Adamovich

Simonov Jurij Andreevich

Shtrambrand Vladimir Il'Ich

Dates

2015-04-27Published

2013-11-06Filed