Air cushion catamaran
SUBSTANCE: catamaran comprises two parallel hulls with connection elements, venting unit with drive mounted at catamaran fore and channels for air feed from the plant. Both hulls feature a flat-bottomed design. Outlet ends of said channels are directed to hull bottom at acute angle. Note here that said outlets of channels are made in said bottom as crosswise slits or rows of holes made uniformly over the bottom length.
EFFECT: higher speed, power savings in motion under water.
The invention relates to shipbuilding, in particular to the construction of transport, sports and other boats of the catamaran type.
Famous catamaran, made in the form of two parallel hulls joined at the top by a deck with superstructure and propulsion complex, containing mounted below the waterline propulsion. As the last applied twin-rotor supercharger Diesel engine, which is perpendicular to the opposite walls of the housings and attached to him /patent RF №2351500, M. CL B63B 1/10, 2009/.
Famous catamaran has good speed, but low maneuverability over obstacles support surface because of the location of the propeller below the waterline.
Another analogue of the claimed invention is a vehicle air cushion with a keel in the middle of the bottom containing the air handling unit supplying compressed air from one side to the chamber to create an air cushion and on the other hand in the air ducts to create thrust. The outlet openings of the air channels placed in the rear of the hull vehicles /USSR patent No. 499790, M. CL B60V 1/18, 1976/.
The disadvantage of the device in this patent is that with effective use of the air flow ventilation system to create thrust W�ucitelka part of the cost of energy accounts for the creation of the airbag, which has a negative impact on the performance characteristics of the vessel.
The closest analogue of the proposed technical solution to the technical essence and the achieved result is a catamaran air cushion containing two parallel buildings with elements of their connection, the ventilation unit to the actuator and the inlet ducts from the installation. Catamaran capable of carrying a big load and lots of people to reach speeds of up to 110 km/h. The base of each hull of the catamaran has a cavity into which air is blown, creating a lifting force and speed /U.S. patent No. 6948439, M. CL B63B 1/38, n. CL. 114/67A, 2005/.
The airflow generated by the ventilation unit, is mixed with air airbag, which prevents the use of airflow to create thrust and limits the speed capability of the catamaran.
The problem to be solved by the claimed invention is to increase the speed capabilities of a catamaran.
Another technical result, which can ensure the proposed technical solution in comparison with the closest analogue, is to reduce energy costs on the mode of movement of the vessel over the water.
The task is achieved by the fact that the known device comprises two pas�allelic corps with elements of their connection, the ventilation unit to the actuator and the inlet ducts from the installation, and according to the invention both enclosures are made flat-bottomed, and the output ends of the channels facing towards the bottom of the housing at an acute angle, the outlet channels are made in the bottom in the form of evenly spaced over the length of the bottom transverse slits or rows of holes.
The invention is illustrated by drawings, where Fig.1 schematically shows a view of a catamaran on the side with the broken-out section on a diametrical plane and dug in one of the buildings of the vessel; Fig.2 - bottom view Fig.1 with a transverse slit in the bottom of the housings; Fig.3 is bottom view of Fig.1 with transverse rows of holes in the bottom of the housings; Fig.4 is a view along arrow A in Fig.1.
The proposed catamaran air cushion contains a parallel flat-bottomed hulls 1 and 2 are interconnected at the front and at the top - deck with 3 add-4. In the front mounted air handling unit 5 wheel /Fig. not shown/ and 6 channels air from the installation of 5 in both buildings 1 and 2. Outlet channel 6 is formed in the bottom in the form of the underside of the transverse slits 7 or the underside of the transverse rows of holes that are evenly spaced along the length of the housings 1 and 2. The weekend ends 9 channel 6 is directed to the bottom at an acute angle α toward the aft of the hulls 1 and 2. �to assure manageability of the catamaran while driving in the channels 6 are mounted the butterfly valve and control system /Fig. not shown/. With their help regulated speed, roll and pitch of the ship in hover mode and movement over the water.
When the drive air from the ventilation unit 5 is fed through the channels 6 and the ends 9 under excess pressure through the slit 7 or hole 8 is ejected into the bottom at an acute angle thereto and across the width of the slits in the direction of the stern of both hulls 1 and 2. A jet of air is pressurized under the bottoms, raising the catamaran above the base surface. The air flow is generated reactive pillow, allowing the forced modes for thrust to obtain the lifting and traction, providing the height of the flight and maneuver of the catamaran.
The prototype sports catamaran with transverse rows of holes in the bottom of the hulls, which are successfully tested.
Thus, in the proposed technical solution effectively uses the airflow from the ventilation unit to create thrust and increase the speed of the catamaran.
Catamaran air cushion containing two parallel buildings with elements of their connection, the ventilation unit with the drive mounted in the bow of the catamaran, and channels air from the installation, characterized in that both enclosures are made flat-bottomed, and the output�s the ends of the channels facing towards the bottom of the housing at an acute angle, in this case the outlet openings of the channels are made in the bottom in the form of evenly spaced over the length of the bottom transverse slits or rows of holes.
SUBSTANCE: collapsible catamaran comprises two floats, collapsible carcass, composite connectors and connecting fasteners. Said floats are furnished with eyebolts, crosswise stability stabilizers, fore baffle plate, lower and upper support levers. Cabin collapsible carcass consists of vertical props, lengthwise and crosswise plates. The latter are provided with sleeves and angle pieces consisting of brackets, left and right shaped angle pieces, lateral and inner angle pieces.
EFFECT: simplified design, higher strength and reliability, better mobility and stability.
2 cl, 4 dwg
SUBSTANCE: hydrocycle includes hull, engine, clutch coupling, reducing gears, control mechanisms. The hull is made streamlined, cigar-shaped, with front transverse step and flat bottom. In the upper part of hull, driver's seat is installed at the sides of which horizontal stabilisers with elevating rudders are fixed. After stabilisers, water-aerial rudder is installed. Inside the middle part of body, through cylindrical channel is made which opens to top surface of hull and ends on flat surface of bottom behind step and is covered from top and from bottom by safety grids. In the upper part of through cylindrical channel, axial-flow air blower is installed behind which antivirtex device is placed. The engine is placed in the fore part of hull, revolving reducing gear and intrachannel reducing gear are connected with axial-flow air blower via clutch coupling. On the top part of hull, T-shaped handle is installed with possibility to turn in horizontal plane and kinematically connected water-aerial rudder and right and left elevating rudders and with possibility of separate turning in vertical plane.
EFFECT: improved technical characteristics of vessel.
FIELD: engines and pumps.
SUBSTANCE: invention relates to shipbuilding and can be used also for fabrication of propeller screws for various vessels. For fabrication of the propeller helicoid screw a screw shaft is designed with a possibility of rotation, on the surface of which the blades of the propeller screw of the vessel hull are provisioned in series. The shaft is designed as two halves the end of which is hinge-jointedly placed in an active clamp. The active clamp is fixed in a middle part of a rigid cover with round surface from its bottom side and they are connected functionally with the machine for transfer of the rotation moment to them. The opposite ends of two halves of the shaft are hinge-jointedly placed in a passive clamp which is fix in the top part of the linear rigid cover with a round surface of its opposite sides.
EFFECT: decrease of speed of rotation of running screws is achieved.
SUBSTANCE: invention relates to ship building, particularly to high-speed boats made of polymer composites. This crosswise hollow step is made of polymer composite comprises outer skin and damping elements composed by at least one plate (horizontally arranged diaphragm) located inside the step between skins of the vessel and step to connect vertical lengthwise diaphragms in height decreasing to vessel fore. Note here that lengthwise diaphragms on top and bottom sides of damping elements are shifted in crosswise direction relative to each other. Lengthwise diaphragms and sidewall with skin and damping elements are glued together with the help of thrust foam plastic to be secured to the skin and damping elements and covered by one or several plies of reinforcing material. Vulcanising-on angle-pieces are welded on step sidewalls and step skin. Step cavities arranged one above the other in one or two lengthwise cross-sections of the vessel (relative to ship centreline plane) are filled with high-density foam plastic.
EFFECT: decreased shock loads, lower drag on rough sea.
3 cl, 5 dwg
SUBSTANCE: proposed device comprises casing shaped to hollow truncated cone. Cone is shaped to vessel hull sizes and has its cross-section directed along motion. Case aft is provided with water-jet propulsor secured at sliding joints with clearance between cone case walls and those of water-jet propulsor.
EFFECT: higher efficiency, lower drag and noise.
SUBSTANCE: invention relates to navy exploiting high-navigability and high-speed vessels with power plants running on hydrogen fuel and the product of thermal dissociation of steam, that is, hydrogen and oxygen. Note here that sweet water stored in tanks is used as a heat carrier. This vessel comprises surface hull mounted at streamlined supports of underwater hulls, starting steam plant arranged in surface hull, sweet water tanks, main power plants with steam condensers to use sweet water as power carrier to produce useful power. Said power plants include gas turbine plant and steam plant engaged by shaft with electrical generator connected in electrical protection hardware. Steam units running of used hydrogen and oxygen of thermal dissociation gas turbines are connected via steam lines with steam collectors and plasma chemical heaters of said main power plants and refrigerators for cooling of said used hydrogen and oxygen. Steam units are connected to cooling system running on liquid metal heat carrier of the main power plants connected to steam turbines connected to electrical generators connected to switchboards and to capacitors. Plasma chemical heaters and reactors with their power supplies, motors connected with screw propellers are arranged in underwater hulls. It differs from known designs in that thermal dissociation gas turbine to produce useful power, hydrogen and oxygen incorporates plasma chemical heaters arranged regularly in circle to heat steam to temperature over 2000°C.Said plasma chemical heaters are connected to power supply and connected, on one side, via valve gear with high-temperature and high-pressure steam collector and, on opposite side, with reactors for thermal dissociation of steam to produce hydrogen and oxygen their temperature exceeding 2500°C. Threes are connected to power supply including HF generators and capacitor bank connected with diverging nozzles and cylinders of wave compressors. The latter incorporate water or liquid metal injectors connected to gas turbine fitted on the shaft engaged with electrical generator. Said turbine is provided with discharge pipe to force used hydrogen and oxygen into steam unit. Or, thermal dissociation gas turbine incorporates plasma chemical reactors for thermal dissociation of steam and production of hydrogen and oxygen with temperature over 2500°C and high pressure. Said reactors are connected via valves gears with high-pressure and high-temperature steam collectors on one side and, on the other side, with cylinders connected to aforesaid diverging nozzle and cylinders of wave compressors provided with water or liquid metal injectors connected with gas turbine. Said turbine is provided with discharge pipe to force used hydrogen and oxygen into steam unit. Also, it differs in that plasma chemical heaters, plasma chemical reactors for thermal dissociation of steam and production of hydrogen and oxygen with temperature over 2500°C, or plasma chemical reactors, diverging nozzles and wave compressor cylinders are provided with jackets for circulation of aforesaid coolants for cooling reactors for thermal dissociation of steam and production of hydrogen and oxygen with temperature over 2500°C and high pressure. Also, it differs in that plasma chemical heaters or reactors incorporate housing with jacket, cover and cap and electrode-cathode secured in housing, in electric insulation ply. Said cathode communicates with cooled nozzle, the anode, arranged at the angle to axes of said reactors. Or, plasma chemical heaters or reactors are arranged in one unit with light ionising additive injectors built therein and arranged in the axis of reactors. Note here that valve mechanism with high-pressure-and-temperature inlet valve is arranged at plasma chemical heater housing. Also, it differs in that valve mechanism comprises steam feed pipe and discharge valve with constrictor and spring. The latter is composed of tubular slider plugged on one side and fitted in cylinder secured at the housing. Said cylinder has openings in it and inlet valve tubular slider walls to intake steam in plasma chemical heater or reactor. Its differs in that said reactor is made of ceramic material with circular inductor arranged thereon and composed of copper pipes with jacket for circulation and cooling of reactor walls and inductor by water. Also, it differs in that steam plat for combustion of hydrogen and oxygen incorporates axial compressor connected with long pipes, combustion chambers arranged regularly in circle. They include injectors to ignite hydrogen in oxygen by injection of gaseous jets of conducting fluid thermal dissociation products with diverging nozzles and wave compressor cylinders connected to steam turbine. The latter is fitted on shaft engaged with electrical generator and incorporates branch pipe to discharge used steam into condenser. Besides, it differs in that said injector comprises casing with conducting liquid feed pipes. Said pipes are connected to cylindrical channels arranged inside the casing in insulating material ply. Electrodes connected to pulse generator are arranged on one side of said channels while, on opposite side, nozzle are arranged directed at the angle to each other and communicated with blast chamber of injector that has perforated bottom for escape of gas jets.
EFFECT: clean atmosphere.
SUBSTANCE: invention relates to ship building, namely to marine propulsors for shallow-water flat-bottomed vessels. The marine propulsor contains pressurised water supply pipeline and nozzle. Vessel's fore end is made at the front as part of cylindrical or spherical shell. On the front outside surface, water is pumped under pressure from nozzle from above or from above-behind. This water spreading down over shell surface and interacting with water beneath waterline of flat-bottomed vessel creates pushing force.
EFFECT: creation of traction force.
4 cl, 4 dwg
SUBSTANCE: hull lines and structural layout are proposed for an afterend of an underwater semi-submersible large-tonnage ship with protruding parts.
EFFECT: reduced resistance of shape to ship motion, increased coefficient of use of cargo volume, optimal placement of EU and a rudder propeller unit for improved controllability.
6 cl, 4 dwg
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
SUBSTANCE: invention relates to ship building, particularly to designing of ocean fishery ships for self-contained and all-weather fishing far from ports in storm and ice areas of far east seas of Russia and north-west of Pacific. Proposed fishing boat features relatively notable draft, streamlined fore waterlines and bent stem, cruise aft with slip for drag-net and side pockets for storage and servicing of drag-net boards on aft deck right behind the towing winch. Fishing board has the hull with hydrodynamic compensation for roll and pitch at rough sea with aft drag-net deck covered from winds and mooring, anchoring and cargo devices arranged at boat fore in solid heated superstructure that covers the crew from flooding by rough storm waves and prevents accumulation of ice at high-intensity icing.
EFFECT: enhanced performances, higher safety of navigation in stormy and icy latitudes.
SUBSTANCE: air cushion vehicle comprises hull, propulsion and discharge units, air cushion guard with fore and aft moving elements, side skegs and mid skeg to divide said area into LH and RH separate chambers. Discharge unit incorporates steering device to control air forcing into said chambers. Side and mid skegs are composed of two cases each. Note here that retractable rotary propulsors are arranged in every chamber between two cases.
EFFECT: enhanced performances.
SUBSTANCE: hovercraft comprises displacement hull with V-shaped bottom, central ski with transverse steps and lengthwise steps. The latter are arranged at vessel fore. Note here that bottom incorporates extra cleats extending from edges to mid point. Lengthwise steps are hollow and through design.
EFFECT: higher speed and mobility.
2 cl, 3 dwg
SUBSTANCE: proposed ship comprises hull with lengthwise lateral compartments accommodating vertical lift propulsors. Primary engine is arranged at ship hull fore-part and engaged with said vertical lift propulsors. Sustainer propulsor is arranged at hull stern part and engaged with horizontal motion propulsors. Ship incorporates navigation control system and course-keeping ability control system. Vertical lift propulsors feature identical design and comprise round case wherein rotor runs in bearings composed of the solid of revolution consisting of three integral parts separated by thin discs.
EFFECT: enhanced performances.
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.
SUBSTANCE: invention relates to universal transport facilities that can move in various media. Amphibious planning vehicle comprises hull with cabin, engine compartment, screw propeller with protective ring and inflatable floats with blowers. Contact surface of the floats is equipped with protective shell arranged to flex over their length. Said hull is composed of a wing-type deck with small elongation that features sweepforward leading edge. Wing-type deck tail has flaps deflecting up and down and furnished with extending tail skids. With flaps moving down, said tail skids brake the vehicle on surface of motion. Wind-type deck inner space is filled with foam plastic and fuel tanks.
EFFECT: higher speed and safety in planning, braking on ice and snow.
3 cl, 3 dwg
SUBSTANCE: invention relates to ship building, particularly, to air-cushion craft destructing the ice cover by resonance waves. Air-cushion craft is displaced in selected direction at preset speed and, at a time, in sinusoidal path. Note here that in displacement in sinusoidal path, the craft is tilted to centers of curvature of said path.
EFFECT: higher efficiency of ice breaking.
SUBSTANCE: invention relates to ship building, particularly, to hovercrafts. Proposed joint comprises stiff structure composed of hovercraft hull stiff structural element edge strip and elastic shell attached thereto by fasteners to make hovercraft flexible guard. Said fasteners represent "П"-like clevises made of strong resilient material with their foot ends bent inside to make elastic spring-loaded hooks to lock the clevis. Said hovercraft hull stiff structural element edge strip is set to position approximating to normal line to the edge of as-stretched shell and has paired holes for clevis foot with hooks arranged along the joint length. Elastic shell panel edge is tucked under and clamped to make a pocket with perforated edge, perforation being aligned with holes in structural element edge strip through which clevises are run. Ends of clevises run through appropriate mate holes and ate fitted against the stop to lock engagement by latching ends of spring-loaded hooks.
EFFECT: higher strength and reliability of joint.
2 cl, 2 dwg
SUBSTANCE: invention relates to ship building. Proposed ship comprises hull with lengthwise lateral compartments accommodating vertical lift propulsors. Primary engine is arranged at ship hull fore-part and engaged with said vertical lift propulsors. Sustainer propulsor is arranged at hull stern part and engaged with horizontal motion propulsors. Ship incorporates navigation control system and course-keeping ability control system Vertical lift propulsors feature identical design, each comprises rectangular housing accommodating two identical lifting mechanisms arranged one above the other. Every said mechanism has rectangular box with open part directed upward. Several pairs of cylindrical drums are fitted on bearings in top section horizontally and in parallel. Gear is fitted on shaft of every drum while idle gear are fitted between gears to engage with two gears of two adjacent drums. Distance between drums makes 0.3-0.5 mm. Taper gears and drum vertical shafts on bottom lifting element engage with drums of top lifting element. Drums run in one direction. Porous elastic wear proof insert is fitted inside the box to get in contact with bottom surfaces of drums and box bottom.
EFFECT: higher operating performances.
SUBSTANCE: invention relates to air-cushion vehicles, namely, to hovercraft. Proposed craft comprises inflatable guard of cushion, hull, discharge unit with steering, cushion guard with bow and stern elements. Craft is equipped with extending guide device composed of bearing frame articulated to hull bottom bearing frame, hydraulic drive and disc wheel pivoted to said frame along hull lengthwise axis. Disc wheel axis in extreme extended position is located in lateral plane perpendicular to craft lengthwise axis to cross the point of application of resultant forces acting of craft.
EFFECT: higher stability at side wind.
SUBSTANCE: invention relates to ship building, particularly, to amphibious ships. Proposed device comprises housing with bulk separation platform, front and/or rear drive drums whereon fitted is elastic bearing closed belt with air floats across platform outer horizontal surface. It comprises also closed chamber between platform bottom surface and belt bottom flight that makes sealed air cushion communicated via air duct with air blower. Besides it includes closed chamber guard made up of flat walls closing gaps between belt flights and platform topl and bottom surfaces. It incorporates propellant engine articulated with front and/or rear drive drum. Belt side edges are conjugated with flat walls of bottom closed chamber side guards. Aforesaid drums are arranged between said guards. Platform is jointed with aforesaid flat inner walls of guards and articulated with drive drums. Platform is divided into watertight compartments to house engine, drum transmission and air blower. Air float inside pressure is lower than air pressure in closed air cushion below bottom closed chamber. Platform bottom surface is located above top envelop of belt operating shape. Side guards have skids with their level located not lower than horizontal tangent to circle arc of belt idle shape corresponding to its position without contact with support medium. Height of air floats resting on soil is set to provide for required clearance of skids with belt bottom support flight located between top and bottom envelopes.
EFFECT: higher reliability and efficiency.
4 cl, 10 dwg
FIELD: ice breaking technique; breaking ice cover by resonance method with the aid of hovercraft.
SUBSTANCE: proposed method includes excitation of resonance flexural gravitational waves in ice and creation and change of aerodynamic lift force at frequency of resonance flexural gravitational waves. In the course of motion of ship, alternating aerodynamic lift force is created at frequency of resonance flexural gravitational waves by turning the horizontal plates to positive and negative angles of attack towards incoming flow of air. Plates are mounted on upper deck. Angles of attack are periodically changed at frequency of said waves.
EFFECT: increased thickness of ice broken by this method.