Ice Breaking Vessel

Abstract

An icebreaking vessel (10) with icebreaking reamers (23a, 23b) at each side and, in connection with the reamers, propellers (24a, 24b) for the propulsion of the vessel. The icebreaking vessel can be formed by attaching a detachable icebreaking bow section (31) equipped with reamers and propellers in connection with them to any such ship (30) which is not an actual icebreaker and which has corresponding joint members for attaching the detachable bow section to the ship.

1 . An icebreaking vessel ( 10 ) with reamers ( 23   a ,  23   b ) at each side, characterized in that, in connection with the reamers ( 23   a ,  23   b ) located at each side of the icebreaking vessel ( 10 ), there are propellers ( 24   a ,  24   b ) for the propulsion of the vessel. 
     
     
         2 . A vessel ( 10 ) according to  claim 1 , characterized in that there are downwards breaking reamers ( 23   a ,  23   b ) at each side of the vessel ( 10 ) and the propellers ( 24   a ,  24   b ) in connection with them are located in the midship area of the vessel, or between the midship and the bow of the vessel. 
     
     
         3 . A vessel ( 10 ) according to  claim 1  or  2 , characterized in that the propellers ( 24   a ,  24   b ) in connection the reamers ( 23   a ,  23   b ) located at each side of the vessel ( 10 ) are attached to propeller shafts ( 25   a ,  25   b ) directed towards the stern of the vessel, the propellers shafts being horizontal or tilted downwards or upwards, and the propellers shafts being parallel as viewed from above or directed slightly outwards, towards the sides of the vessel, or inwards, such that the propeller shafts form an angle relative to one another. 
     
     
         4 . A vessel ( 10 ) according to  claim 1  or  2 , characterized in that the propellers ( 24   a ,  24   b ) in connection the reamers ( 23   a ,  23   b ) located at each side of the vessel ( 10 ) are attached to either fixed or azimuthing thruster apparatuses ( 28 ) which have one or two pulling propellers ahead of the thruster apparatus, or one or two pusher propellers astern of the thruster apparatus, or at least one propeller ahead of the thruster apparatus and at least one propeller astern of the thruster apparatus. 
     
     
         5 . A vessel ( 10 ) according to any one of  claims 1 - 4 , characterized in that the vessel ( 10 ) has propellers ( 24   a ,  24   b ) in connection with the reamers ( 23   a ,  23   b ) located at the sides of the vessel ( 10 ) only. 
     
     
         6 . A vessel ( 10 ) according to any one of  claims 1 - 4 , characterized in that, in addition to the propellers ( 24   a ,  24   b ) in connection with the reamers ( 23   a ,  23   b ) located at the sides of the vessel ( 10 ), the vessel has at least a single propeller ( 24   c ) and/or thruster apparatus ( 27 ) in the stern. 
     
     
         7 . A vessel ( 10 ) according to any one of  claims 1 - 6 , characterized in that, the inclination of the hull sides relative to the vertical plane in the bow section of the vessel ( 10 ) is greater than 10° at the point where the hull sides of the ship come into contact with the ice to be broken. 
     
     
         8 . A vessel ( 10 ) according to any one of  claims 1 - 7 , characterized in that, in the icebreaking vessel ( 10 ), the draught of the bow section ( 20 ) equipped with reamers ( 23   a ,  23   b ) and propellers ( 24   a ,  24   b ) is equal to or larger or smaller than the draught of the stern section ( 21 ) of the vessel. 
     
     
         9 . A vessel ( 10 ) according to any one of  claims 1 - 8 , characterized in that the icebreaking vessel ( 10 ) equipped reamers ( 23   a ,  23   b ) located at the sides and propellers ( 24   a ,  24   b ) in connection with them has been arranged by attaching to a ship ( 30 ) which is not an actual icebreaker such a detachable icebreaking bow section ( 31 ) that has reamers ( 23   a ,  23   b ) at the sides and propellers ( 24   a ,  24   b ) in connection with them. 
     
     
         10 . A vessel ( 10 ) according to any one of  claims 1 - 9 , characterized in that the icebreaking vessel ( 10 ) is comprised of a ship ( 30 ), such as a merchant ship or a cargo ship, to which can be attached a detachable icebreaking bow section ( 31 ) with reamers ( 23   a ,  23   b ) at each side and propellers ( 24   a ,  24   b ) in connection with them. 
     
     
         11 . A vessel ( 10 ) according to any one of  claims 1 - 10 , characterized in that the total engine power of the propellers ( 24   a ,  24   b ) in connection with the reamers ( 23   a ,  23   b ) of a detachable icebreaking bow section ( 31 ) is greater than or equal to the engine power of the propeller or propellers of the ship ( 30 ) to be attached to the detachable bow section. 
     
     
         12 . A vessel ( 10 ) according to any one of  claims 1 - 11 , characterized in that the detachable icebreaking bow section ( 31 ) equipped with reamers ( 23   a ,  23   b ) located at the sides and with propellers ( 24   a ,  24   b ) in connection with the reamers can be attached to the ship ( 30 ) when breaking ice is necessary or when the ship is heading to ice-covered water areas, and can be detached from the ship when the ship is used in open water areas. 
     
     
         13 . A vessel ( 10 ) according to any one of  claims 1 - 12 , characterized in that, in the icebreaking vessel ( 10 ), the draught of the detachable bow section ( 31 ) equipped with reamers ( 23   a ,  23   b ) and propellers ( 24   a ,  24   b ) is equal to or larger or smaller than the draught of the ship ( 30 ) to be attached to it. 
     
     
         14 . A vessel ( 10 ) according to any one of  claims 1 - 13 , characterized in that the propulsion system of the detachable icebreaking bow section ( 31 ) of the icebreaking vessel ( 10 ) includes parts such as an electric motor, generator, diesel engine and the fuel tank of the diesel engine, which are distributed and positioned such that some of the said parts are located in the detachable icebreaking bow section ( 31 ) and some in the vessel ( 30 ). 
     
     
         15 . A vessel ( 10 ) according to any one of  claims 1 - 14 , characterized in that the detachable icebreaking bow section ( 31 ) equipped with reamers ( 23   a ,  23   b ) and propellers ( 24   a ,  24   b ) in connection with them has joint members to attach the detachable bow section to any ship ( 30 ), such as a merchant ship or a cargo ship, which has corresponding joint members for attaching the detachable bow section to the ship. 
     
     
         16 . A vessel ( 10 ) according to any one of  claims 1 - 15 , characterized in that the icebreaking vessel ( 10 ) is arranged by the detachable icebreaking bow section ( 31 ) equipped with reamers ( 23   a ,  23   b ) and propellers ( 24   a ,  24   b ) in connection with them and any ship ( 30 ), such as a merchant ship or a cargo ship, that can be selected from a group of one or several such ships where the ships belong to these groups have joint members for attaching the detachable bow section to the ship. 
     
     
         17 . A vessel ( 10 ) according to any one of  claims 1 - 16 , characterized in that the icebreaking vessel ( 10 ) is arranged alternatingly by at least two ships ( 30 ), such as a merchant ship or a cargo ship, with joint members for alternatingly attaching the detachable icebreaking bow section ( 31 ) equipped with reamers ( 23   a ,  23   b ) and propellers ( 24   a ,  24   b ) in connection with them.