Sea-going ice-breaking transport vessel and propulsion- and-steering complex for this vessel
FIELD: water transport facilities.
SUBSTANCE: proposed sea-going ice-breaking transport vessel has hull with keel, forecastle with deck house, fore pointed extremity, aft convex cochleariform lines, aft deck and propulsion-and-steering gears. Hull is additionally provided with flat bulb considerably projecting beyond fore perpendicular. Fore lines are made with U-shaped frames over entire height of side including forecastle superstructure with streamlined deck house; keel is rising in sternpost area; when it is stowed, its lower aft wedge-shaped edge projects beyond sternpost line. Aft cochleariform lines form section of deck which is oval in plan with transom inclined at angle of 45 deg. In underwater portion, lines smoothly change into side bulges-sponsons provided with passageways with longitudinal slots in their bottom part for motion of propulsion-and-steering gears over them. Side bulges-sponsons terminate in falling-out side on external side and falling-home side in their fore part so that line of maximum breadths in this area directed upward and sternward should cross the waterline at angle of 3-6 deg. Extreme breadth of hull over bulges-sponsons in the waterline area exceeds midship breadth. Bottom part of passageway has horizontal or slightly deadrise surface in cross-sections which passes to stern at angle of 1-3 deg. relative to waterline and extends to deck at angle of 45 deg. On both sides of its oval section made in form of shoulder perpendicular to hull CL. Propulsion-and-steering gear includes two all-moving struts with nacelles located in aft section of ship, motors in nacelles for rotating the propellers and load-bearing service lines running to struts from power module of vessel. Struts with nacelles are located on both parts of stern in bulges-sponsons. Each strut with nacelle has streamlined guide stud in form of spherical segment with base directed upward which is equipped with circular thrust sliding bearing over its perimeter; each strut has vertical shaft which is coaxial with segment and is rotated by motor in radial-thrust bearing of carriage located in passageway of bulge-sponson and driven by means of load-bearing service lines on four bevel gear wheels connected in pairs by means of transversal hydraulic cylinders of carriage and driven by hydraulic motors built in them; hydraulic motors are thrown into engagement with inclined toothed racks laid on either side from slot in bottom part of passageway. Width of this slot is equal to diameter of vertical shaft.
EFFECT: enhanced ice passability of vessel.
3 cl, 7 dwg
The invention relates to water transport, mainly can be used to create dual-purpose vessels.
The prior art of the claimed invention known used in practice icebreakers and icebreaking vessels (1), dual-use vessels, at the expense of a full-circle of azimuthing thruster using two types of navigation of the vessel on the go: free water - nose, ice - stern (2).
The closest analogue to the claimed Maritime icebreaking transport ship is ice-breaking supply vessel "Fesco Sakhalin" (3), the body of which is equipped with aft cargo deck and the bow pointed tip with add-tank, stationary rotary propulsion and steering devices, in the form of azimuthing thruster (PVRC). At the aft end with a spoonlike shape is fixed keel.
The disadvantage of the vessel is insufficient capacity in the ice of considerable thickness and low nautical properties in the free water. The deficiencies due to the known design of the body and stationarity rotary propulsion device.
The task of the claimed invention is the creation of a vessel, effective for movement as in the ice, so to free water.
Technical financial p is tat, achieved in the process of solving the task is to improve the icebreaking capacity of the ship in the ice of considerable thickness and increase nautical properties of the ship to free the water.
The specified technical result is achieved by the claimed Maritime icebreaking transport vessel having a hull with a keel, tank cabin, bow pointed tip, feed convex spoonlike lines, aft deck and propulsion and steering device, the housing is further provided with a flat Bulba significantly Pro-fore perpendicular, nasal contours are made with U-shaped ribs along the entire height of the Board, including the add-tank with a streamlined deckhouse, Kiel near aftershave done lifting so that in the retracted state for a line of aftershave is the lower aft edge having a wedge shape. Feed the spoonlike shape oval form in plan area deck with sloped at an angle of 45° transom and in the underwater part smoothly into the side boules-sponson with corridors with longitudinal slots in their bottom part to move them propulsion and steering devices. Side boules-sponsori the outer side of the end ruined by the Board at their aft and overwhelmed by the Board in their bow so that the line of best W the Rin Board in this area, with the upward and aft, crossed the waterline angle 3-6°while the overall width of the hull at the bulls-sponsons near the waterline more than the midsection, and bottom part of the corridor has a transverse cross sections of horizontal or slightly keeled surface, going aft at an angle 1-3° to the waterline and out on the deck at an angle of 45° on either side of her oval area in the form of a ledge perpendicular to the median plane of the body.
High navigation properties are achieved by a U-shaped ribs along the entire height of the hull shell and tank with a streamlined superstructure, giving the minimum reaction corps in roll, pitch and as well as due to much speaker for the bow perpendicular flat nasal Bulba, penetrating the oncoming wave and constraints, thus, vertical movement of the nose, reducing the total wave resistance of the hull in calm water and increasing the stability of the ship on course, and feed lifting keel, providing the minimum resistance from the stop screw rotary propulsion device when the transverse movement of the body during maneuvering of the vessel.
High capacity in the ice of considerable thickness is achieved by feeding convex spoonlike contours with a lifting keel and side boules-CSP is soname, where there are corridors for mobile propulsion and steering devices, allowing the keel to clean the hull and propulsion and steering devices to move to the nose, without interfering thereby promoting the stern of the vessel when creeping on the ice.
To solve the tasks vessel equipped with a mobile propulsion and steering devices.
The closest analogue to the claimed propulsion and steering device is a rotary propeller-steering column (PVRC) type "Azipod" (4), representing a column gondola hosting propellers, rotating motors with power communications energy module of the vessel.
The disadvantage PVRC is insufficient reliability of the columns, due to the fact that near the ice aftershave PVRC affected destructible ice when moving astern.
Another disadvantage is that the repair of engines and propulsion stationary PVRC only possible due to the drydocking of the vessel, which reduces the time use a vessel to perform icebreaking transport works and increases repair time.
These drawbacks are eliminated by the inventive propulsion and steering device containing two full-circle rack with gondolas placed in to rmoval part of the vessel, motors in pods, rotating propellers, power of communication, the input to the counters from the power module of the vessel, while the rack with gondolas placed on either side of the stern in the bulls-sponson, and every hour with the gondola contains in the upper part of the streamline nedelcu in the form of a spherical segment base to the top, provided with an annular thrust sliding bearing on the perimeter concentric with the segment of the vertical shaft, rotatable by means of motor-thrust bearing carriage in the hallway Buhl-sponson hull and are able to move by moving the power communications on four bevel gears pairwise connected by transverse cylinders carriage and driven built-in motors, which engages with the inclined racks, padded on both sides of the slit in the bottom part of the corridor while the slot width equal to the diameter of the vertical shaft.
The inventive propulsion and steering device enables the achievement of a technical result, namely, that when sailing ships "empty" there is an opportunity to change the depth of propulsion without the use of liquid ballast, which increases the speed of the ship in this mode, and while maneuvering is possible to provide the minimum resistance the body from the transverse focusing propulsion PVRC.
The ability to move PVRC and power communications it provides various provisions PVRC depending on the operational situation: in the course of his nose in free water or maneuvering - conventional fodder for maximum propulsion efficiency when driving at high speed and better maneuverability; in the course astern in ice conditions or during empty - shifted in the nose, ensuring the reliability of the device under the influence of ice on the enclosure and high propulsive efficiency; during the inspection, repair or replacement of the device - extreme feed with access to the deck.
The invention is illustrated by drawings, which depict: figure 1 - the declared seaworthy icebreaking supply vessel double action with propulsion and steering devices of the type PVRC, equipped with coaxial counter-rotating screws, figure 2 - theoretical drawing of the housing; figure 3 - lifting keel; figure 4 - operating positions propulsion and steering device; figure 5 - propulsion and steering device, the right; figure 6 - propulsion and steering device, side view; 7 - propulsion and steering device, top view.
The housing 1 of the inventive vessel has a pointed nose shape with a U-shaped frames 2 over the entire height of the Board, including the add-tank 3 with a streamlined deckhouse 4 and acute water the deposits 5 at great length nose taper and a small cylindrical insert, and significantly Pro-nasal perpendicular flat nose Bulba 6, convex spoonlike lines 7 at the rear, forming an oval in plan area deck 8 with a sloped at an angle of 45° transom 9, aftershaves 10 and a lifting keel 11. Spoonlike contours in the region of the water line 12 to the sides go into the bulls-sponson 13, which are corridors with 14 slots 15 in their bottom sections 16 to move the propulsion and steering devices 17 type PVRC and that the outer side of the end ruined the Board 18 in their aft and overwhelmed by the Board 19 in their bow so that the line of greatest widths of 20 boards in the area crossed the line 12 at an angle ϕ=3-6°while the overall width of the hull at the bulls-sponsons 21 in the region of the waterline more than the width at the midsection 22. The bottom portion 16 of each corridor 14 has a transverse cross sections of horizontal or slightly keeled surface 23, going aft at an angle α=1-3° to the water line 12 and out to the deck 24 at an angle of 45° on either side of her oval section 8 in the form of a ledge 25 which is perpendicular to the median plane 26 of the housing 1.
Lifting keel (see figure 3) has two operating positions: lowered position 27 corresponding to the course of the vessel nose in free water, and a raised position 28, the corresponding maneuvering in free water or housotn astern in ice, and is a flat keel section 29 in the shape close to the rectangular triangle connected by a hinge 30 in the forward corner with the hull of the vessel 1 and having in its lower aft serving in the raised condition for a line of aftershave 10, the shape of the wedge 31 at an angle of about 90°and in the upper right corner of the removable ledge 32.
Keel section 29 is moved in the hull of the vessel 1 in the well 33 in the width, the greater the width of the partition to the desired size of the gap with the top retainer wall 34 and extending from the bottom to the structure of aftershave 10 with the supporting heel 35, and fixed in positions 27 and 28 of the lock 36.
Raising and lowering the keel sections 29 are made using a special actuator, respectively, to touch the top edge 37 and the ledge 32 of the keel section of the thrust wall 34 and the base of the heel 35 of the well 33.
The inventive propulsion and steering device on the hull 1 of the vessel (see figure 4) has at least two operating positions: position 38 to turn the nose in the free water and maneuvering, position 39 to move astern in ice and to move empty, and repair position 40. In the repair position 40 PVRC can be removed using onboard or onshore lifting device.
The inventive device consists of a rotating, moving and stationary parts.
Rotary frequent the inventive device includes a gondola 41 with engines and propellers 42, attached to the rack 43 with nadelay 44 in the form of a spherical segment of large radius base 45 upward in its upper part. Nedelka 44 around the perimeter of the base 45 has an annular thrust sliding bearing 46 from caprolon or similar material and a vertical shaft 47, coaxially with nadelay 44 and having in its upper part, the driven gear rotation 48, the support disk 49 spiral section 73 electroline 50, the drum 51 with waterproof connector electroline 50 and the upper bounding the disk 52.
Moving part of the claimed device includes a carriage 53, with four bevel gears 54 paddle motors 55, connected in pairs with the piston 56 of the power cylinders 57, which is part of the carriage, the support 58 and the thrust bearings 59 of the shaft 47, the pinion gear 60 with the motor 61 to drive the rotation of the column, the ring 62 to raise PVRC crane, ice shield 63 and console 64 and 65 of the transaction, respectively, electroline 50 and hydrochloro 66. When dismantling PVRC in position 40 (see figure 4) console 64 and 65 rasstegivayutsya.
The stationary part of the claimed device is a longitudinal corridor 14 (see figures 1 and 4) and consists of an inclined toothed rails 67, laid on both sides of the slit 15, and channels 68 and 69, respectively, for laying electroline 50 and hydrochloro 66, padded along the corridor 14 in the direction diametrically what locoste hull 1 of the vessel and ending in a dead-end branches 70 and 71, the length of which corresponds to the folded power communications (see figure 4). In the upper part of the channels 68 and 69 are guides (guides)on which the hinges are moved vertical "snake" appropriate power of communication.
Fixation and propulsion device in the positions 38 and 39 (see figure 4) are made as follows.
Flattened by the pressure of working medium in a vane motors 55 (see figure 5), which would mean fixing the bevel gears 54, and served the pressure of working medium between the piston 56 into the power cylinders 57 of the carriage 53, corresponding to a certain pressure on the annular thrust bearing 46 at the expense of spreading through the piston 66 of gear wheels 54 on inclined toothed rails 67 and clamp, thus, the segmental nedelki 44 with a rack 43 and the gondola 41 to the outer linear surface 72 of the housing 1 with the slit 15. The pressure on the annular thrust bearing 46 should be such as to allow free rotation of the shaft 47 of the rack 43 to the gondola 41 with the motor 61 with a pinion 60 through the driven gear 48 on the shaft 47 and its support 58 and the thrust bearings 59 in the body of the carriage 53. For additional fixing of the carriage 53 can be used separate brakes. The hydraulic motor 61 is designed to rotate the shaft 47 of the rack 43 to the gondola 41 to 360°that compensia the t spiral 73 electroline 50. Thus, rotation PVRC in fixed positions 38 and 39 (see figure 4) is the deviation of the vector of stop screws 42 to 360°required for control of the boat on the move and without stroke.
Moving PVRC for making operating positions 38 and 39 (see figure 4) is as follows.
Served the pressure of working medium between the pistons 56 (see figure 5) and the ends of the power cylinders 57 to create a minimal gap between the annular thrust bearing 46 and the outer linear surface 72 of the housing 1 due to removal of spreading through the piston 56 gears 54 on inclined toothed rails 67 and then creates a differential pressure of the working medium in a vane motors 55, corresponding to the rotation of the gear wheels 54 with a specified frequency and displacement of the carriage 53 PVRC in the bow or stern of a vessel.
Moving PVRC for making the repair provisions of 40 (see figure 4) is in a similar way, only with an increased gap between the annular thrust bearing 46 and the outer linear surface 72 of the housing 1 to overcome the carriage 53 of curvature of the corridor 14 in the area 74 (see figure 4). Upon reaching PVRC position 40 in which you want to undock the console 64 electroline 50 (see figure 5), there is a possibility of rotation of the gondola 41 for inspection, repair or replacement of propellers 42 and move the carriage 53 further up in the Orme to the exit due to the engagement of the aft pair of gear wheels 54 with racks 67. After undocking console 65 hydrochloro 66 by means of the second carriage 62 53 PVRC rises either side a crane or coastal lifting means for subsequent repair or replacement.
The invention carry out the following work.
When moving the nose to free water, when the mobile propulsion and steering device in the form of PVRC are in feeding position, a lifting keel is omitted and performs the role of food stabilizer, which is especially important during the course of the vessel empty, when nasal location engine (power module) his body will have the trim on the nose (so-called landing "pig") with exposure feeding bulls-sponsorof and part spoonlike feed lines. In any case, omitted the keel will reduce forage yaw (nose yaw prevents sufficiently recessed speaker bow bulb) and simplify the management of a vessel by reducing the number of reruns PVRC.
While maneuvering to free water or the movement in the ice of a lifting keel rises, line aftershave will be the only of its lower wedge-shaped part. While maneuvering to free water, when PVRC are located in the aft position, spoonlike contours without keel will provide the minimum is gidrodinamicheskoe resistance transverse emphasis PVRC and transverse movement of the rear of the hull as a whole (in particular, during the rotation, relative to the nose).
The most complex movement in the ice of great thickness, carried out with creeping corps on the ice when PRVC in the forward operating position, is as follows. Extended oval stern his aftershaves when creeping on the ice cover creates a stress concentration in it area along the PD housing, with the tapered portion of the lifting keel creates additional concentration along the line of the DP. At this point, the linear surface of the bulls-sponsorof also begin to act on top of the ice plate, increasing, thus, the transverse stability of the vessel and concentrating stress their slits, resulting in chipped ice, the plates must occur on the square, close to the line, the greater base of which is along a DP case. When the creeping body on the ice (upward movement) and the chipped ice plate (downward movement) boules-sponson your cheekbones will break off the edge of the channel ice fields. Fragments of ice during movement of the hull in the channel due to the spoonlike contours should concentrate at his sides with the subsequent release to the surface in the fore part of the hull, where the width at the waterline is much smaller.
Used sources of information
1. The influence of the shape of the bow of the hull on the capacity. Titov, I., SIM is a new Y.A., Mem. of S. // Ship building, No. 11-12, 1992, p.6-8.
2. Towards tempera-the first double-acting tanker. Nav. Archit., 2003, Febr., 23.
3.http://www.HansaInternational Maritime Journal.htm.
4. Features manageability vessels equipped with propulsion complex "AZIPOD". Nemzer A.I., A. Rusetsky (CRI them. Acad. Krylov shipbuilding). Mor. Gazette, 2002, No. 4, p.76-79.
1. Nautical icebreaking supply vessel having a hull with a keel, tank cabin, bow pointed tip, feed convex spoonlike lines, aft deck and propulsion and steering device, characterized in that the housing is further provided with a flat Bulba significantly Pro-fore perpendicular, nasal contours are made with U-shaped ribs along the entire height of the Board, including the add-tank with a streamlined deckhouse, Kiel near aftershave done lifting so that in the retracted state for a line of aftershave is the lower aft edge having a wedge shape, feed the spoonlike shape was oval in form the plan area of the deck tilted under an angle of 45°, transom, and in the underwater part smoothly into the side boules-sponson with corridors with longitudinal slots in their bottom part to move them propulsion and steering devices, side boules-sponsori the outer side of the end ruined by the Board at their aft isovaleryl Board in their bow so to line the greatest widths of the boards in this area, with the upward and aft, crossed the waterline angle 3-6°while the overall width of the hull at the bulls-sponsons near the waterline more than the midsection, and bottom part of the corridor has a transverse cross sections of horizontal or slightly keeled surface, going aft at an angle 1-3° to the waterline and out on the deck at an angle of 45° on either side of her oval area in the form of a ledge perpendicular to the median plane of the body.
2. Propulsion and steering device comprising two rotary rack gondola, located in the aft part of the ship, the engines in nacelles, rotating propellers, power of communication, the input to the counters from the power module of the vessel, while the rack with gondolas placed on either side of the stern in the bulls-sponson, and every hour with the gondola contains in the upper part of the streamline nedelcu in the form of a spherical segment base to the top, provided with an annular thrust sliding bearing on the perimeter concentric with the segment of the vertical shaft, rotatable by means of motor-thrust bearing carriage in the hallway Buhl sponson hull and are able to move by moving the power communications on four bevel gear wheels that are pairwise connected by the priest who ecname the cylinders of the carriage and driven built-in motors, which engages with the inclined racks, padded on both sides of the slit in the bottom part of the corridor while the slot width equal to the diameter of the vertical shaft.
FIELD: smaller and medium shipbuilding.
SUBSTANCE: according to first version, proposed shipboard transmission consists of inclined propeller shaft with propeller and bracket. Propeller shaft is connected with engine shaft via intermediate shaft and two universal joints made in form of constant-velocity universal joints, cardan joints or couplings ensuring rotation of shafts at angle relative to each other. Propeller shaft bracket is secured on ship's hull for lifting it. Joints are located under bottom and are closed with fairing. According to second version, joints are located in branch pipe mounted on inner side of bottom and fitted with flange.
EFFECT: extended range of technical means.
26 cl, 2 dwg
FIELD: smaller and medium shipbuilding.
SUBSTANCE: according to first version, shipboard transmission consists of inclined propeller shaft with propeller and bracket. Propeller shaft is connected with engine shaft or with intermediate shaft via constant-velocity universal joint, cardan joint or coupling ensuring rotation of shafts at angle relative to each other. Propeller shaft bracket is secured on ship's hull for lifting it. Joint is located under bottom and is closed with fairing. According to second version, joint is located in branch pipe mounted on inner side of bottom and fitted with flange.
EFFECT: extended range of technical means.
6 cl, 2 dwg
FIELD: ferries for rivers of limited navigation.
SUBSTANCE: proposed ferry is provided with pontoons which are spaced apart in width and are made from different materials; cargo and passenger deck is secured on pontoons at two levels. Ferry is also provided with propulsion plant. Upper surface of cargo deck rising above water during operation is located in center plane of cylindrical pontoons; lower part of cargo deck which possesses positive buoyancy is immersed in water. Middle cylindrical part of each pontoon is made from non-metallic materials and is connected with metal end units by means of flanged joint located inside pontoon. Propulsion plant consists of two portable units mounted turnably on cargo deck for control of heading; these units are spaced apart along longitudinal axis of symmetry on edges of cargo deck.
EFFECT: increased capacity of ferry at shallow draft.
4 cl, 9 dwg
FIELD: shipbuilding; building of submersible vehicles for study of sea depth.
SUBSTANCE: proposed submersible vehicle has hull and aft propulsion plant which includes two reversible cruise propulsors mounted in horizontal plane at angle to submersible vehicle axis on both sides from axis. Propulsion plant of submersible vehicle is additionally provided with rudder stock mounted in horizontal plane perpendicularly to longitudinal axis of submersible vehicle; rudder stock is provided with reversible drive for performing reciprocating motion relative to longitudinal axis. Reversible cruise propulsors are immovably mounted on rudder stock. Proposed submersible vehicle possesses high maneuverability in vertical plane (in depth) over entire range of working speeds which is necessary for passing round obstacles in conducting TV survey near water area bottom.
EFFECT: enhanced efficiency of control of submersible vehicle.
FIELD: bridge erection and crossing equipment; pontoon parks.
SUBSTANCE: proposed mounting includes frame, transom board, cross-piece, spacer and two side members. Cross-piece is made in form of beam secured on force portion of pontoon by means of pin joint and provided with shaped bolts for securing on pontoon transom. Spacer is made in form of distance truss with lower and upper brackets supported by fore portion of pontoon and is secured to cross-piece by means of bolts; frame is connected with cross-piece by means of fork joint and is supported by spacer; articulated to each strut of frame is side member which may be fixed in working position; both side members are provided with plates to which transom board is secured. Besides that, struts of frame are provided with brackets and transversal couplings of side members are provided with lugs; brackets and lugs have two parallel holes each where axles and pins-retainers are fitted in skew-symmetric position relative to side member. Proposed device ensures motorization of pontoon and compact transportation due to folding of mounting in transportation position reducing volume by 3 times.
EFFECT: enhanced efficiency and reliability.
2 cl, 8 dwg
FIELD: oil producing industry; floating oil platforms.
SUBSTANCE: invention relates to devices for breaking ice over perimeter of floating oil platform. Proposed ice breaking device contains falling weight and weight-lifting machine installed on platform and provided with wire rope, sheaves and winch with drive mechanism. Falling weight is provided with lugs, cavity with lead filler of without such filler filled with inert gas or gaseous nitrogen at pressure of 0.01-25 MPa, and cover. Falling weight is made cylindrical, diameter 0.05-10 m, with saw-like, or conical or wedge-like cutting head, and weight-lifting machine is provided with machine travel motion mechanism.
EFFECT: improved reliability of ice-breaking device.
FIELD: water transport; ice-breaking fleet.
SUBSTANCE: proposed device includes watercraft acting on ice cover which is provided with gas source and system for delivery of this gas under ice cover. Gas supply system is provided with manifold located under cover and mechanism for placing this manifold in submersible position for forming gas interlayer in ice-breaking zone.
EFFECT: extended range of technical means.
SUBSTANCE: proposed jet-propelled catamaran has two cargo and passenger hulls with connection members and propulsor. Catamaran propulsor is made in form of double-flow turbojet engine installed in fore section on pylons in between hulls; engine is provided with jet propulsion nozzle directing the reaction gases sternward at angle of 45o relative to water surface for slightly raising the fore section of catamaran above water surface and thawing the ice on this surface in between hulls. Pylons are located at level of upper surface of hulls.
EFFECT: wide use of catamaran.
FIELD: sea-going transport; ships of active ice navigation.
SUBSTANCE: proposed ice-navigation ship has parallel middlebody between fore and aft extremities and is provided with rimers mounted in fore extremity. Ship's hull is provided with side rimers mounted on either side within middlebody area; side rimers are arranged along ship and their front parts are located at distance from fore rimers as far as section in the vicinity of ship's CG at shift towards ship's bow from section where section of the run begins; height of rimers exceeds distance between load and ballast waterlines.
EFFECT: reduction of radius of turning under ice conditions; enhanced passability through ice under action of ice compression.
3 cl, 5 dwg, 1 tbl
FIELD: shipbuilding; multi-purpose dry cargo vessels for carrying cargoes in water areas covered with ice and not covered with ice.
SUBSTANCE: proposed multi-purpose dry cargo vessel has hull with fore and aft extremities and sides provided with ice strengthening members. Hull bottom in aft extremity has inclined surface. Extent of cargo holds is no less than half length of vessel and maximum breadth is no less than ¾ of ship's extreme breadth. Main propulsion plant with propulsor is swivel in construction. Slewing axis of main propulsion plant is deflected at angle α from vertical in CL or in plane parallel to CL. Axis of thrust vector is also inclined at angle α from normal relative to slewing axis of main propulsion plant. Angle satisfies condition 0<α≤β/2, where β is angle whose magnitude is equal to magnitude of average angle of inclination of ship's bottom surface in aft extremity relative to ship's waterplane on inclined section of bottom located below level of point of intersection of main propulsion plant slewing axis with propulsor thrust vector axis.
EFFECT: reduced usage of material; enhanced survivability and durability of vessel.
15 cl, 4 dwg
FIELD: shipbuilding; carrying liquid cargo in water areas free from ice and in water areas covered with ice.
SUBSTANCE: proposed ship has fore and aft extremities of hull with main engine plant and propeller; engine plant is preferably mounted in aft extremity and is turnable relative to axis deflected from vertical in CL or in plane parallel to it. When running in water area covered with ice, ship moves with her aft extremity forward and vector of propeller thrust is directed at angle relative to plane of waterline contour upward away from center in ship's length, mainly in parallel with average angle of inclination of lower section of ship's bottom near main engine plant. When running in water area free from ice, ship moves with her fore extremity forward and vector of propeller thrust is directed in parallel with plane of waterline contour towards center in ship's length. Direction of propeller thrust vector is changed by turning the main engine plant around inclined axis which is deflected through angle α; vector of engine thrust of main engine plant is also deflected from normal to slewing axis of main engine plant through angle which satisfies the condition 0<α<β/2, where β is angle equal to average angle of inclination of bottom surface to respective extremity of ship in plane of waterline contour at inclined section of bottom located below point of intersection of slewing axis of main engine plant with axis of propeller thrust vector.
EFFECT: enhanced economical and operational efficiency; improved sea-going qualities in water area covered with ice.
24 cl, 7 dwg
FIELD: shipbuilding; submarine ships breaking ice cover by resonance flexural gravitational waves.
SUBSTANCE: proposed device includes submarine ship running under ice at resonance velocity. Submarine ship is provided with hair coat on her upper surface at point of arising of first trough of flexural gravitational waves.
EFFECT: enhanced efficiency of ice breaking.
FIELD: shipbuilding; submarine vessels breaking ice cover.
SUBSTANCE: proposed method consists in forming area of reduced pressure under ice cover. Area of reduced pressure is formed in space between ice and ship which is formed by rigid folding envelope. Lower edge of this envelope is secured to upper surface of ship and upper edge is secured to lower surface of ice cover by means of buoyancy elements. Envelope is preliminarily divided into lower and upper parts by means of membrane. Membrane is provided with device for converting the membrane from watertight to non-watertight, shutters for example.
EFFECT: enhanced efficiency of ice breaking in limited areas.
FIELD: transportation of liquid cargoes in bulk, inclusive use of tankers.
SUBSTANCE: proposed method includes transportation on land from points of production, storage or processing by means of pipe lines and/or ground transport, transshipment of cargoes to storage reservoirs of temporary storages, loading of cargoes on board tanker and motion of tanker to point of delivery. Tanker used for transportation of cargo has hull with fore and aft extremities, bottom, inner bottom, sides, upper deck and cargo zone with cargo tanks located over larger part of tanker length. Tanker is provided with double sides over larger part of its length; sides have outer and inner plating forming inter-side space divided vertically by upper platform located in upper third of double side freeboard. Inner plating of side is structurally combined with respective longitudinal bulkheads of at least part of cargo tanks. Longitudinal bulkheads are flat in construction and are provided with vertical pillars on section from double bottom as far as inter-side platform and with longitudinal stiffeners on section from upper inter-side platform as far as upper deck.
EFFECT: enhanced economical efficiency of transportation of liquid cargoes in bulk.
25 cl, 9 dwg
FIELD: shipbuilding; construction of ice-type tanker hulls.
SUBSTANCE: proposed tanker has hull with bottom, inner bottom, vertical sides, ballast tanks, upper deck and cargo zone with cargo tanks located over larger part of its length. Double sides have inner and outer plating forming inter-side space divided vertically by upper inter-side platform located in upper third of tank height. Inner plating of side is structurally combined with respective longitudinal bulkheads of some cargo tanks. Longitudinal bulkheads are flat in construction and are provided with vertical pillars on section extending from inner bottom as far as upper inter-side platform and with longitudinal stiffeners on section from upper inter-side platform as far as upper deck; framing members are located inside inter-side space. Tanks are divided in pairs by center corrugated longitudinal bulkhead; corrugated bulkheads are provided with horizontal corrugations and with at least one pillar located on deep frame in each tank.
EFFECT: enhanced damage resistance and durability of tanker.
17 cl, 6 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.