Ice breaker for operation in shallow freezing sea areas

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

 

The invention relates to shipbuilding and, more particularly, to ice-breaking ships and tugs intended for operation in ice in the shallow waters.

In conditions of ice-covered shallow water areas the main problem is the procurement of the required thrust to overcome the force of the ice resistance with limited sediment that causes the limitation of the diameter of the propeller and the value of effectively recycle their power.

Restriction the level of processed engine power, given its diameter exists even when a large depth. It is due to the presence of the power limit, when at a fixed diameter propellers (HS) is the development of intense cavitation, leading to a sharp drop in thrust screws and a significant increase of the unsteady hydrodynamic forces and vibration. The requirement to obtain the maximum possible thrust propulsion to achieve the highest icebreaking capability of the vessel leads to the fact that almost all the icebreakers there is cavitation in the first stage, which still leads to lower thrust propulsion. With decreasing precipitation vessel cavitation intensified because of the limitation of the diameter of GW and his approach to free surface water, as well as an additional dangers�ü procosa air to HS (the phenomenon of aeration).

Known Meloidae icebreaking vessel (type "Kapitan Evdokimov". - "A means of extending navigation on inland waterways", V. A. Zuev, "Shipbuilding", 1986, p. 47) for operation in shallow water, taken as a prototype, containing four traditional propeller mounted on the shafts symmetrically relative to the median plane (DP) vessel (two in each direction side), and two steering wheels located behind Central HS totalling vessel propulsion and steering complex, located in the aft skirt of the vessel. With end edges of the propellers do not go beyond the level of the base plane of the vessel height and the designed waterline (DWL) in width at their location.

However, vessel propulsion and steering complex known icebreaking vessel does not provide him with enough maneuverability to conduct ice operations in cramped conditions, especially during operations at offshore oil and gas facilities. His stern extremity is not suited for long-term destruction of ice on the back course, the presence of rudders reduces the movement rate in the ice on the back course and often leads to their damage, in addition, propellers poorly protected against ice loads. On the back of the ship is unstable and not really manageable. Also during certain modes of operation of the propulsion possible�n proses air in the work area guards.

The object of the invention is to improve on the front and reverse maneuverability of the ship in cramped conditions in the ice and, including, clean water, increasing its ice qualities, as well as improving the effectiveness of the fight against protocom air into the region of the working propellers azimuth thrusters and propeller the propellers.

For this purpose icebreaking vessel for work mostly in shallow freezing waters, comprising a housing with a feed valance sliding type, having a flat bottom and leaseway visor on the perimeter valance, and placed in feed valance vessel propulsion and steering complex, including two each side mounted on the shafts symmetrically to the center plane of the vessel the propeller of the propulsion unit, located at the height of the vessel so that the end edges of the propellers do not go beyond the level of the base plane of the vessel and the designed waterline at the location of the guards, according to the invention is equipped with two fully steerable propeller-rudder speakers (WRC), equipped with pulling propellers, mounted on the shaft propeller-rudder speakers before their gondolas with not protruding beyond the base plane of the vessel end edges of the blades, and placed symmetrically with respect to a diametral plane of the vessel with the displacement of the stern so that the separation discs rowed�'s screws WRC disks from each side of the installed propeller propulsion of the vessel is not more than the value of the diameter of the propeller, and is provided with a contactless paddle propellers rotate WRC 360° around their axes. Feed the valance vessel in the area to the designed waterline has ice-breaking form with a pronounced wedge with an angle of taper moulded components, 90-180°, and is inclined at an angle of at least 30° to the vertical surface. Leaseway visor aft valance, has a wedge-shaped cross-section, does not extend past the hull and made the setting in your direction over the plane of the disks for each side of the installed propeller propulsion of the vessel by an amount not to exceed two diameters of the above-mentioned propulsion. He has the height at which the lower edge of the visor aft spaced upward from the axis of rotation of the propellers VRK not less than half the radius of these propellers.

By equipping an icebreaking vessel fully steerable propeller-rudder speakers greatly improves the maneuverability of the vessel with the same effective power, ensures the stability of the vessel on course and manageability while going astern.

The location of the propeller of the propulsion devices of the traditional type on the sides of an icebreaking vessel, and a full-circle WRC - near DP vessel, provides better conditions of work of the WRC by protecting them from possible splashing of large ice formations rotating out-Board propellers, cast most of the broken hull of the vessel with ice in�parties.

The discs HS WRC and drives the propeller of the propulsion of the vessel at a distance apart not exceeding one propeller diameter propeller of the vessel, to minimize the impact on WRC unsteady hydrodynamic forces from jets located each side of the propeller the propellers.

Equipping WRC pulling propellers can improve quality of ship icebreaking especially in reverse and protects VRK racks from damage.

Icebreaking form feed valance with a pronounced wedge and inclined with an angle of at least 30° to the vertical surface when driving in reverse contributes to the destruction of the ice bending, splitting and priceplan sectors of ice that improves ice quality in reverse.

Leaseway visor with the cross-section wedge-shaped, and mounted not in favour of the hull on all draft varies and entering the nose for drives propellers propellers, more effectively prevents aeration (prosoco air), and also contributes to the destruction of the ice cover.

The distance of the bottom edge of the canopy upward from the axis of rotation of the propellers VRK not less than half the radius of these propellers to minimize the deterioration of traction characteristics digitalno and steering equipment due to the ingress of the sun visor in jet DIGITE�her.

The essence of the invention is illustrated by drawings, where Fig.1 schematically shows an icebreaking vessel for operations in shallow freezing waters; Fig.2 - view of the vessel of Fig.1 from the stern; Fig.3 - view from the bottom on the ship of Fig.1.

Icebreaking vessel (Fig.1-3) includes a housing 1 having a feed valance with 2 lesasilny visor 3 disposed in the aft valance 2 vessel propulsion and steering the ship, including two located each side of a traditional propeller propulsion of the vessel 4, mounted on the shafts 5, and mounted on the housing 1 of the vessel two fully steerable azimuth thrusters with 6 screws 7.

Feed the valance 2 has a pronounced wedge-shaped with an angle of taper θ moulded 90°≤θ≤180° (Fig.3) and is inclined at an angle α≥30° to the vertical surface (Fig.1).

Leaseway visor 3 in the feed has the height at which the distance h from the lower edge of the visor 3 to the axis of rotation of GW 7 6 WRC (Fig.1, 2) is less than half the radius (quarters of diameter D2) HS 7 WRC 6 (Fig.3). The visor is installed the setting in your direction drives for propeller propulsion vessel 4 at a distance L1not more than two diameters (D1rowing propulsion vessel 4 (Fig.1).

WRC 6 are arranged symmetrically DP vessel, with a displacement in the stern from the level plane of the disk of the propeller propulsion 4 su�at a distance of L 2providing free rotation through 360° of azimuth thrusters 6 around its vertical axis of rotation 8 with no contact with both of the propeller engines 4 vessels. In addition, the distance d drives HS 7 6 WRC propeller propulsion vessel 4 does not exceed the diameter D1rowing propulsion vessel 4 (Fig.3).

While rowing propulsion vessel 4 and GW 7 UAC 6 is located at the height of the vessel so that the end edges of the blades of all propellers 4, 7 it does not go beyond the level of the Central plane 9 of the vessel (Fig.1).

Operation of the proposed icebreaking vessel in freezing shallow waters is as follows.

When driving an icebreaking vessel in the ice field forward course the resulting ice sectors protaplivat the housing 1 of the vessel, forming on the surface of the body 1 of the vessel so-called "ice shirt". Moving along the sides and bottom of the vessel, the ice surface in the stern mainly from the sides. When large pieces of ice the main mass of the ice shirt" walking in on each side located traditional propeller propulsion vessel 4, which rotates, is milled ice and drop the bulk of the wreckage of the ice to the sides from behind them near the DP vessel 6 WRC. As a result, the number of ice debris falling on WRC 6, is reduced in several times, and after Frai�of eromania and splitting they have a smaller mass thereby reducing the intensity of ice loads on WRC 6, and therefore increases the reliability of their work. Thus leaseway visor 3 side protects the propeller propulsion vessel 4 and GW 7 6 WRC from the outside of the ship ice while maneuvering, and prevents prosoco air to the propeller propulsion vessel 4 and to propellers 7 6 WRC.

When driving an icebreaking vessel in an ice field in reverse due to the optimized shape of the rear end is the destruction of the ice cover bending, which reduces the energy consumption for breaking the ice, and the resulting ice sectors are moved apart, and caught one of them in the aft valance 2 milled pulling propellers 7 6 WRC and discarded at the side of the casing 1 and side rowing propulsion vessel 4 located on the shafts 5. As a result, the ice does not accumulate in front of the stern, and the ship has a steady course. Thus leaseway visor 3 effectively breaks the ice and prevents the aeration of work area HS 7 6 WRC and rowing propulsion vessel 4.

The proposed icebreaking vessel for operations in shallow freezing waters has improved maneuverable and ice qualities both front and rear track, which distinguishes it from the prototype.

Icebreaking vessel for use primarily in shallow �americausa areas comprising a housing with a feed valance sliding type and having a flat bottom and leaseway visor on the perimeter valance, and placed in feed valance vessel propulsion and steering complex, including two each side mounted on the shafts symmetrically to the center plane of the vessel the propeller of the propulsion unit, located at the height of the vessel so that the end edges of the propellers do not go beyond the level of the base plane of the vessel and the designed waterline at the location of the propeller, characterized in that it is equipped with two fully steerable propeller-rudder speakers, equipped with pulling propellers, mounted on the shaft propeller-rudder speakers before their gondolas with not protruding beyond the base plane of the vessel end edges of the blades, and placed symmetrically with respect to a diametral plane of the vessel with the displacement of the stern so that the separation discs of their propellers from disks installed for each side of the propeller the propellers were not more than the value of the diameter of the propeller, and was provided with a contactless paddle propellers rotating propeller-rudder columns by 360° around its axis, at the same time feed the valance vessel in the area to the designed waterline has ice-breaking form with a pronounced wedge with an angle of taper at the design load waterline, with�component 90-180°, and inclined at an angle of at least 30° to the vertical surface, and leaseway visor aft valance has a wedge-shaped cross-section, installed in the aft valance is not in favour of the hull and entering the nasal direction for the plane of the disks for each side of the installed propeller propulsion of the vessel by an amount not to exceed two diameters of the above-mentioned propulsion, and has a height at which the lower edge of the visor aft spaced upward from the axis of rotation of propellers propeller-rudder columns not less than half the radius of these propellers.



 

Same patents:

Propulsion system // 2544268

FIELD: electricity.

SUBSTANCE: device includes first propeller screw driven by rotating power aggregate and second propeller screw driven by an AC motor. Second propeller screw rotates in direction opposite to the first propeller screw. AC generator is driven by rotating power aggregate and has electric connection to the AC motor. Rotation speed of the first propeller screw is 95-150% of rotation speed of the first propeller screw. AC motor and AC generator have the same electric frequency, AC generator has 2 to 40 poles, and AC motor has 2 to 40 poles. AC generator to AC motor pole number ratio is 0.05 to 20.

EFFECT: profitability of device providing electric power at a ship or sea vessel.

14 cl, 9 dwg

FIELD: transport.

SUBSTANCE: method of manufacturing water vessel with improved characteristics of penetration into ice includes hull (1) with the first end (2) and the second end (3), which is provided with engine assembly creating main vessel propellent traction while vessel is moving with any end being forward. Engine assembly comprises at least three engine devices of which at least majority is antitorque propeller rotor devices (4) and located on at least two different distances from the second end (3) of vessel so that when the vessel is moving in ice or in ice formations with its second end (3) being forward, propeller rotor with one or more engine devices installed near the second end (3) of the vessel is positioned so that it breaks ice. Propeller rotor with one or more engine devices located further from the second end (3) of the vessel is positioned so that it moves broken ice or pieces of ice further from ice formations. Water vessel with improved characteristics of penetration into ice includes engine assembly with at least three engine devices of which at least majority is antitorque propeller rotor devices (4) and which are located on at least two different distances from the second end (3) of vessel so that when the vessel is moving in ice or in ice formations with its second end (3) being forward, propeller rotor with one or more engine devices installed near the second end (3) of the vessel is positioned so that it breaks ice.

EFFECT: vessel is capable to effectively break ice and move in heavy ice conditions.

11 cl, 2 dwg

FIELD: transportation.

SUBSTANCE: said utility invention relates to the ship building industry, in particular to designs of double-stage marine blade propeller systems. A blade propeller system comprising a propeller and a counterpropeller coaxially installed behind it, which has variable pitch blades, a mechanism for the rotation of the latter about the vertical axis, and a counterpropeller hub stopping mechanism. Each of the counterpropeller blades is curvilinear and curved in such a manner that its suction or pressure surface at the blade end portion faces the outer surface of the counterpropeller hub.

EFFECT: enhanced multifunctional blade propeller system performance, particularly decreased counterpropeller vibration level in reactive mode of operation, elimination of blade erosion damage, and enhanced hydrodynamic efficiency when counterpropeller operates in reactive mode.

3 cl, 3 dwg

FIELD: transport.

SUBSTANCE: invention refers to method and device for steering motor vessel driven in motion and/or steered by two propulsion installations. Propulsion drive contains at least one first drive of propelling gear and at least one second drive of propelling gear. First drive of propelling gear rotates first screw-propeller and adjusts propulsive capacity and/or rotation speed of first screw-propeller. Second drive of propelling gear rotates and adjusts speed of second screw-propeller. Propulsion drive is steered with single control instruction. At that, control instruction forms first control signal for control of first drive of propelling gear and second control signal for control of second drive of propelling gear.

EFFECT: raising of efficiency of drive gear control is raised for vessels having several propulsion installations.

12 cl, 3 dwg

FIELD: transport.

SUBSTANCE: invention relates to ship building, particularly to ice breaking facilities operated in combination with tug. Propose ice breaking adapter pushed by pusher tug is intended for making of navigable waterways in ices. Adapter hulls are composed of front and two lateral rigidly interconnected frame structure for tight contact with pusher tug. Said hulls feature a broken flat stern in shape approximating to triangle at waterline level. Lateral hulls feature equal width and are shifted downward from the main hull so that the line extending through their stems level with the waterline is spaced from the parallel line extending level with waterline through main hull stem-post at least 0.1 of the main hull width in its midship. Said lateral hulls are located on both sides from the main hull so that their midship planes are spaced from ice breaker midship plane by distance I defined by the formula: m, where Bf and Bl are widths of the front and lateral hulls in midship plane. Device for tight contact of said adapter with pusher tug is arranged at frame structure to extend by magnitude b making at least 3 m beyond the line passing through lateral hull stem-posts.

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.

EFFECT: improved operational performance of scientific and research vessel for seismic exploration.

3 cl, 1 dwg

FIELD: physics, navigation.

SUBSTANCE: invention relates to seismic survey of underwater oil and gas deposits in Arctic seas. Disclosed is a vessel having a design which combines the advantages of a surface ship (high level of habitability, safety and a large deck area which enables maintenance and repair of seismic survey equipment) and advantages of a multipurpose underwater station, particularly use of hydroacoustic emitters and seismic cables towed in water under ice for 2D seismic survey. The towed seismic cables and hydroacoustic emitters are released using extensible structures mounted in vertical shafts in the bottom part of the vessel outside the ice region.

EFFECT: high reliability of seismic survey in ice conditions, reduced negative impact of seismic survey on the environment and marine ecology.

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.

5 cl, 3 dwg

Icebreaker fore end // 2535588

FIELD: transport.

SUBSTANCE: icebreaker fore end, including hull fore end lines of optimal shape, contains board rotary units for creation of wells in thick ice as icebreaker is moving. Each of rotary units is made as changeable hollow cylinder with cutting elements in the form of diamond teeth on lower part - coring bit with changeable coaxial auger bit inside it. Coring and auger bits have independent drives of axial rotation around vertical axis with reversing and device for bit feeding into wells.

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

2 dwg

FIELD: transportation.

SUBSTANCE: method is proposed to break ice cover, in which a pushing buoyant force is developed during motion of a semi-submersible ship, which presses at the lower surface of ice in vertical direction, and ice is broken with a ram brought under it with an ice-breaking rib connected to the ship body. The vertical pushing force is developed by all positive buoyancy of the semi-submersible ship and lifting force of its horizontal hydrodynamic rudders, at the same time the ram acts at ice in horizontal direction both by its inclined breaking rib and its entire surface. Also a semi-submersible icebreaking ship is proposed.

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

8 cl, 9 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to preventive jobs aimed at prevention of ice jams formation at river section and can be used for softening of ice cover at areas of underwater communications. Ice cover cleaned of snow is blacked to arranged ice bulky lens. The latter focus sun rays at blacked surface and inside ice cover.

EFFECT: accelerated destruction.

2 cl

FIELD: transport.

SUBSTANCE: invention relates to ship building, particularly, to arctic navigation. In arctic navigation ice-breaking sip and common ship, common ship is, first, arranged in ice-breaking ship dock. Then, all ice-breaking ships along with icebreaker are coupled in butting column by fitting ship fore to aft recess of forward ship and with the help of unified docking unit. Note here that clearance between aft of every ship and fore of coupled ship is overlapped board skegs that rule out crushed ice effects at ship fore lines. Icebreaker aft has intake part of unified docking assembly and, optionally, devices of stiff docking with fore of the next ship.

EFFECT: higher efficiency and safety.

34 cl, 11 dwg, 1 tbl

FIELD: agriculture.

SUBSTANCE: invention relates to ice technology, in particular, to performing icebreaking works with air-cushion ships. During the low tide the air-cushion ship moves with the resonance speed along the shoreline at a distance from the edge of the cadder and excites the resonant flexural-gravity waves in the ice, at that the transverse periodic motion is transmitted to the ship, with an amplitude not exceeding the half of the wavelength of the static deflection of ice, and the frequency equal to the frequency of resonant flexural-gravity waves.

EFFECT: increase of the efficiency of ice cover destruction.

2 dwg

FIELD: transport.

SUBSTANCE: invention relates to shipbuilding and concerns vessel or floating structure working in frozen waters. Proposed vessel contains hull or similar structure (1, 1') including at least one arc-shaped end or similar portion (2, 2') of hull which portion subjects to ice loading action when ice or vessel is moving. The mentioned arc-shaped end or similar portion (2, 2') of hull in underwater part of hull is equipped with facilities for bringing out from beneath of vessel bottom one or more strong essentially upward water streams towards ice or ice field encountered by arc-shaped end or similar portion (2, 2') of hull. Proposed invention also concerns method of vessel or floating structure use in frozen waters.

EFFECT: technical result consists in improved vessel performance in frozen waters.

14 cl, 9 dwg

FIELD: shipbuilding; submarine vessels running under ice conditions and breaking ice cover by resonance method at surfacing in compact ice.

SUBSTANCE: while breaking the ice, ship makes several lanes at area of surfacing; number of lanes is dictated by safety of surfacing. Degree of breaking the ice is determined by maximum force of thrust of propeller.

EFFECT: enhanced safety of surfacing under ice conditions.

FIELD: shipbuilding; amphibian hovercraft breaking ice cover by resonance method.

SUBSTANCE: proposed device includes hovercraft. Laser gun mounted in hovercraft hull is used for forming the light and hydraulic impact under crest of flexural gravitational wave when ship is running at resonance speed along edge of ice cover.

EFFECT: enhanced efficiency of ice breaking.

FIELD: shipbuilding; amphibian hovercraft breaking ice by resonance method.

SUBSTANCE: proposed device includes hovercraft with electro-hydraulic water-jet propeller mounted in its hull and used for forming hydraulic impact under crest of flexural gravitational wave when ship is running at resonance speed along edge of ice cover.

EFFECT: enhanced efficiency of breaking ice cover.

FIELD: shipbuilding; amphibian hovercraft breaking ice cover by resonance method.

SUBSTANCE: proposed device includes hovercraft with laser unit mounted on the bottom. Said laser unit is used for making notches on ice in transverse direction relative to ship's motion.

EFFECT: enhanced efficiency of ice breaking.

FIELD: shipbuilding; submarine ships breaking ice cover by resonance flexural gravitational waves.

SUBSTANCE: proposed device includes submarine ship running under ice cover at resonance speed. Upper surface of ship's hull in her fore portion under first trough of flexural gravitational waves excited by ship is provided with easily deformable envelope under which damping fluid is placed.

EFFECT: enhanced efficiency of breaking ice cover.

1 dwg

FIELD: shipbuilding; submarine ships breaking ice cover by resonance flexural gravitational waves.

SUBSTANCE: proposed device includes submarine ship running under ice cover at resonance speed. Upper surface of ship in her fore portion under first trough of waves excited by ship is provided with wedge-shaped cavitator.

EFFECT: enhanced efficiency of breaking ice cover.

1 dwg

Up!