Ship navigation in ice

FIELD: transport.

SUBSTANCE: proposed method comprises creation of thrust with the help of ship propulsor to act upon the ice bulk along with creation of rarefaction in water by its intake and ejection from the area in shift aft in direction of ship motion. Note here that water ejection is performed by ship propulsor or by ship active control means.

EFFECT: power saving in navigation in ice.

 

The invention relates to shipbuilding and can be used in the design and manufacture of vessels intended for driving in icy conditions.

There are two main groups of methods of the movement of the vessel in ice. The first group includes the methods, is the impact on ice massif directly to the hull and its various elements (see, for example, patent RF №2268193, IPC WV 35/08). The second group includes the methods, is the impact on ice massif is not only the hull but also additional factors, for example, the shock wave generated when a high-voltage discharge (ed.the certificate of the USSR No. 1131757, IPC WV 35/08), hydraulic jets, created with a water gun (Aut. the certificate of the USSR No. 203494, IPC WV 35/08), high-frequency energy generated by a generator of ultra high frequency energy (RF patent No. 2465399, IPC WV 35/08). Both methods have their drawbacks. Implementation methods emerging in the first group, requires powerful icebreaking ships propulsion and durable shells made of expensive high-alloy steels considerable thickness. Ways second group, are energy-intensive and can be used at short-term movement of the vessel in ice.

Closest to the claimed invention p� technical essence and the achieved result is a method of movement of the vessel in the ice from the first group of the above methods, including stops with the help of propulsion and power impact of the hull on solid ice with creating additional dilution in water through its intake and discharge zone at the end of the housing, in the direction which is the movement of the vessel (see RF patent №2230000, IPC WV 35/08, 2004 ). The disadvantage of this method of the movement of the ship in the ice is the need for introduction to the design of the ship more powerful pump, providing the intake and pumping water.

The purpose of this invention is to simplify the method of movement of ships in ice conditions.

This object is achieved in that in the known method the vessel in the ice, including the creation of the stop by means of ship propulsion and the impact of his body on the solid ice with the additional creation of suction in the water through its intake and discharge zone at the end of the housing, in the direction which is the movement of the vessel, the pumping of water is carried out by the propulsion of the vessel or its means of active control.

The creation of a vacuum in the aquatic environment below the ice surface initiates the pressure drop along the height of ice, leading to deformation and cracking. This facilitates the fracture of ice that the ship's hull. Organization of dilution in an aqueous medium can be produced by intensive sampling and QC�chki water from the zone at the end of the vessel, in the direction which the movement of the vessel. As devices, providing the intake and pumping water, you can use the propulsion of the vessel or means of active control of the vessel - thrusters, for example T-shaped water-jet thrusters. To accommodate such devices and means must, in the extremity of the vessel, towards which it is moving. If the ship moves forward nose part, then this part can be located thruster. If the ship is moving forward stern, respectively, the aft propeller of the vessel, providing a reversing mode of intensive sampling and pumping water. The ship propulsion or thrusters perform the role well pump, pumping water from the zone at the end of the vessel and create a vacuum zone in the aquatic environment in front of him. For example, a thruster with a channel diameter of 1.3 m and a speed of flow in the channel 7 m/s to pump out from the bow area of the vessel (5,5 - 6,0) cubic meters of water per second and thereby create a significant vacuum in the aquatic environment.

Using the proposed method allows to significantly simplify the way of the movement of the ship in the ice due to the exclusion of additional equipment (pumps).

The way the ship in the ice, �comprising creating emphasis using propulsion of the vessel and the impact of his body on the solid ice with creating additional dilution in water through its intake and discharge zone at the end of the housing, in which direction is the motion of the vessel, characterized in that the dewatering is carried out by the propulsion of the vessel or its active management.



 

Same patents:

Ice breaker aft // 2551638

FIELD: transport.

SUBSTANCE: ice breaker aft comprises ice breaking ledge rigidly secured at stem-post in the ship centre line and arranged behind rudder blade along ship motion. Top end of rudder blade turn axle extends thorough stem-post while bottom end is secured at the heel rigidly secured with keel. Said rudder blade turn axle is arranged on the side of ice breaking ledge side, said ledge being rigidly coupled by vertical prop with appropriate end of said heel to make a vertical protective frame around rudder propeller unit. Vertical prop rear edge is sharpened. Ice baffle plates are rigidly secured on both sides of stem-post at acute angle to horizontal plane at ship hull underwater surface, free ends of said plates are lowered under secured edges by at least to the level above below screw top edge. Distance from rudder blade turn axle to its rear edge does not exceed the radius of curvature described by said edge.

EFFECT: better controllability in reverse motion, higher reliability of rudder propeller protection.

3 cl, 3 dwg

FIELD: transport engineering.

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FIELD: construction.

SUBSTANCE: device is proposed to damage ice cover comprising an underwater vessel equipped with ballast cisterns, due to drying of which a trim is created to a stern and buoyancy force. In the bow there is a container with a reservoir in it, walls of which are made of corrugated elastic material. Inner sides of the container are equipped with remotely controlled relief valves, and the reservoir itself with the help of a flexible hose is connected with a source of compressed air, is attached to the bottom of the container with the help of slings, and being straightened by supplied air it acquires toroid shape.

EFFECT: increased efficiency of ice cover damage by an underwater vessel.

5 dwg

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.

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3 dwg

FIELD: transport.

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EFFECT: higher safety of navigation in ice.

1 dwg

FIELD: transport.

SUBSTANCE: invention relates to ship building, particularly, to surface scientific and research vessels. Scientific and research icebreaking vessel is proposed for carrying out 3D seismic technology exploration irrespectively to ice conditions which vessel has a hull where seismic equipment is located, as well as a shaft for bay cable laying. To move source of acoustic waves untethered unmanned submersible is used which bases on a vessel and is dropped and lifted via separate vertical shaft using running - pulling tool.

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FIELD: physics, navigation.

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4 cl, 1 dwg

FIELD: transportation.

SUBSTANCE: invention relates to design of hull lines of a ship hull with higher icebreaking capability having a stem with a bulb. Eyes of a ship hull are proposed, having a bottom in the area of a midship frame with low or zero deadrise and boards close to vertical ones, comprising a bulb having in its upper part a straight or slightly bent rib, formed in the diametral plane during connection of the right and left surfaces of the bulb at the spatial angle of 30-150°, having an inclination forward to 30° to the plane of the waterline and crossing planes (levels) of the highest and lowest positions of the rated waterline of the ship in the head for different versions of its load. The upper surface of the bulb is made with gradual rise from its front part to the area of coupling with main hull lines, the length of the body part of the bulb in the longitudinal direction makes 4-5 theoretical spaces. Cross sections of the bulb vary slightly along the width from 1 to 3 of the theoretical frame. Coupling of the eyes with the bulb lines is made to form concavity of buttocks, stretching at the angle downwards from the start of coupling on the stem to the area of approximately 3-4 of the theoretical frame.

EFFECT: increased icebreaking capability of a ship and speed of its movement.

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Icebreaker fore end // 2535588

FIELD: transport.

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EFFECT: higher icebreaker capability to go through Arctic thick ice fields.

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FIELD: transportation.

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EFFECT: increased efficiency of ice cover breaking and icebreaking capability for transportation of loads.

8 cl, 9 dwg

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EFFECT: enhanced safety of surfacing under ice conditions.

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EFFECT: enhanced efficiency of ice breaking.

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EFFECT: enhanced efficiency of breaking ice cover.

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