176results about "Hydrodynamic/hydrostatic features" patented technology

The utility model belongs to ship equipment technical field discloses a kind of wave compression device and boat. Wave compression device includes hinged six-bar mechanism, spoiler piece and rotary drive part, rotary drive part drives spoiler piece rotation by hinged six-bar mechanism, to make spoiler piece have the working position of extension into water. The utility model is driven by first connecting rod continuous rotation, by the hinged transmission of fourth connecting rod and spoiler piece, the swing angle of spoiler piece is naturally limited by the rotation range of first connecting rod, without setting rigid stroke end, allowing rotary drive part continuous rotation, without reversing, avoid the "overshoot phenomenon" of traditional reciprocating motion, eliminate the vibration, wear and tear and control deviation problem caused by overshoot fundamentally.

The universal system for toolless mounting of wings to hydrofoils, according to the invention, is applicable to various types of hydrofoils, and provides quick and easy mounting of wings to hydrofoils. The system comprises two plates (4, 9) capable of linear sliding relative to each other and locked together through guide elements and channels. A shaft-mounted lever rotates between locked and unlocked positions: in the locked position it presses the plates (4, 9) together to prevent movement, while in the unlocked position it releases this pressure. The plates (4, 9) also include a stop to limit linear travel and through-holes for fastening the plates (4, 9) respectively to the fuselage and the wing.

The application belongs to the technical field of ships, and discloses an energy dissipation device, a moon pool and a ship. The energy dissipation device is arranged on the inner wall of the moon pool of the ship and comprises a buffer plate arranged in the vertical direction and parallel to the inner wall of the moon pool, a perforated plate arranged on the side of the buffer plate away from the inner wall of the moon pool and parallel to the buffer plate, a plurality of through holes for fluid passing being arranged on the perforated plate, each through hole penetrating the perforated plate in the direction perpendicular to the buffer plate, and a turbulence assembly arranged on the side of the buffer plate away from the perforated plate and used for guiding and dispersing the sloshing fluid in the moon pool. The perforated plate is used for dissipating the energy of the dispersed fluid, and the buffer plate is used for dissipating the energy of the fluid passing through the perforated plate. The energy dissipation device can effectively dissipate the energy generated by the fluid sloshing in the moon pool, suppresses the amplitude and impact force of the fluid sloshing, reduces the vibration and noise of the equipment, and improves the safety, stability and safety of the equipment.

To provide a friction reduction device capable of increasing a friction resistance reduction effect and reducing a pressure loss.SOLUTION: A friction reduction device of a navigation body navigating in contact with water has multiple cavity grooves open to the surface of the navigation body, an air supply pipe connected to each cavity groove and supplying air to the cavity grooves, and a header part connected to the air supply pipe and supplying air to the air supply pipe. The multiple cavity grooves are arranged in a line along the travelling direction of the navigation body. The longitudinal direction of the cavity groove is the direction orthogonal to the travelling direction of the navigation body. On the upstream surface in the travelling direction of the navigation body, the cavity groove has a convex curved surface in the traveling direction of the navigation body, and the air flows along the curved part from the opening and is injected toward the downstream of the traveling direction of the navigation body.SELECTED DRAWING: Figure 2

The application discloses a polymer drag-reducing agent injection type hydrofoil, and belongs to the technical field of polymer drag-reducing agents of underwater vehicles. The application solves the problem that there is no drag-reducing agent injection structure capable of stably outputting polymer drag-reducing agents and capable of adhering to the surface of a drag-reducing part of an underwater vehicle. One end of a steady flow cavity is communicated with a solution storage box in the underwater vehicle through a discharge channel, a cover plate is parallel and slidingly inserted on a main body of the hydrofoil, the lower surface of the cover plate is adhered to the upper surfaces of a plurality of fairing plates, and the outer surface of one end of the cover plate and the inner wall surface of one end of the steady flow cavity form an injection channel. The steady flow cavity has a steady flow effect on the solution, so that the stable output of the polymer solution is realized; the flow state of the polymer solution is adjusted through the fairing plates, so that the polymer solution flows stably; the polymer solution flows out to the surface of the hydrofoil through the injection channel, the frictional resistance generated during sailing is reduced, and the sailing performance of the underwater vehicle is improved.

The application discloses a variable structure high-speed trimaran, and belongs to the ship technology field. The trimaran comprises a main hull, a pair of sheet bodies and a pair of telescopic driving assemblies. The telescopic driving assemblies are fixedly arranged on a shape-keeping box body located on the outer side of the middle-rear superstructure of the main hull and are fixedly connected to the sheet bodies at movable ends. The telescopic driving assemblies are inclined to the outer side along the ship width direction. When the telescopic driving assemblies are retracted, the sheet bodies are folded and attached to the side edges of the main hull, so that the high-speed sailing requirement is met. When the telescopic driving assemblies are stretched, the sheet bodies are pushed to the waterline position obliquely downward to the outer side of the main hull, so that the trimaran shape is formed, and the low-speed high-stability requirement is met. The retraction and extension mechanism is arranged on the shape-keeping box body, so that the cabin space is not occupied. The telescopic driving assembly adopts an integrated frame structure, the driving rod only plays a telescopic role, the supporting rod has the functions of guiding and supporting the sheet body, and the structure is simple and reliable. The connection point position is optimized, so that the water power load is transmitted in the form of axial force, and the stress is reasonable.

A motion absorbing system and method for a structure includes the coupling of a container to a structure. The container has a liquid disposed therein wherein a ullage is defined above a surface of the liquid. An elastic element is positioned in the liquid. The elastic element has a natural frequency tuned to damp motion of the liquid.

This invention discloses a drag reduction and thrust reversal device, relating to the field of fluid dynamics technology. The invention includes a front drag reduction air intake assembly, an automatic rotary cutting assembly, two fluid delivery pipes, and the drag reduction and thrust reversal assembly. The automatic rotary cutting assembly is mounted on the front drag reduction air intake assembly. In this invention, the drag reduction and thrust reversal device, composed of the front drag reduction air intake assembly, the automatic rotary cutting assembly, the fluid delivery pipes, and the drag reduction and thrust reversal assembly, efficiently captures oncoming fluid through an inclined inlet at the front. A filter baffle at the inlet blocks large debris, which is then shredded and mixed by fluid-driven rotary cutting blades. The mixture is then transported through the fluid pipes to the end delivery pipes. Under the action of the tail jet pressurization device, the fluid forms a vortex and is ejected at high speed, generating reverse thrust. This converts oncoming resistance into propulsive power, directly propelling the ship forward, achieving the dual effects of drag reduction and thrust reversal, and converting drag energy into forward propulsion.

An energy efficient ship is achieved by powering the ship using at least one propulsion level, each propulsion level having large grids at the forward and stem ends of the ship and side channels incorporating turbines that move water through the ship, rather than around the ship, thereby substantially eliminating energy wasting wakes and cavitation.

A marine vessel 10 comprises a deck 11 and a superstructure 12 that comprises at least two elongate portions 13a and 13b mounted on the deck, positioned either side of the centreline of the vessel, an

This utility model discloses an easily adjustable guide vane fixing base for marine air lubrication. The key technical points are: belonging to the field of marine equipment repair and construction, it includes a mounting frame body, with an air release device installed at the upper end of the mounting frame body; a support is movably connected to the lower part of the mounting frame body; and a symmetrically distributed limiting frame is fixedly connected to the upper end of the support. By setting guide blocks and top rods, the guide blocks move to drive the connected top rods, which in turn drive the top frame to adjust its position. This allows for precise control of the guide vane's height during installation, enabling it to quickly align with the designed installation position and improving positioning accuracy. The adjustable height function allows for fine-tuning of the guide vane's posture and position during initial installation or trial assembly, avoiding rework caused by positional deviations before welding or bolt fixing. This improves the convenience of assembling the guide vane body using this marine air lubrication guide vane fixing base.

This application belongs to the field of surface drag reduction technology for underwater vehicles, specifically relating to a composite skin structure and its fabrication method, and an underwater vehicle. The composite skin structure includes a skin body comprising: an anode layer electrically connected to a positive power source; a first insulating layer disposed on one side surface of the anode layer; a cathode layer disposed on the surface of the first insulating layer away from the anode layer, and electrically connected to a negative power source; and a hydrophobic gas-stabilizing layer disposed on at least a portion of the surface of the cathode layer away from the anode layer. The skin body has multiple openings penetrating it, with a superhydrophobic coating on the inner wall of each opening, and a superhydrophilic coating on the surface of the hydrophobic gas-stabilizing layer away from the cathode layer. This composite skin structure enables "adaptive" on-demand replenishment of the gas phase while significantly reducing underwater drag.

The application belongs to the technical field of law enforcement boats, and particularly relates to a steel-glass mixed high-speed law enforcement boat, which comprises a high-speed law enforcement boat body, the upper surface of the bow deck of the high-speed law enforcement boat body is fixedly connected with a hollow leveling block, the upper surface of the hollow leveling block is fixedly connected with an air extraction pump and a protective cover through connecting bolts, the air outlet end of the air extraction pump is fixedly communicated with the upper surface of the hollow leveling block, the outer wall of the protective cover is provided with a threaded hole, and the hole wall of the threaded hole is sealingly connected with an air inlet filtering mechanism. The steel-glass mixed high-speed law enforcement boat has the function of adjusting the buoyancy, thereby the water depth can be adjusted, the running resistance of the high-speed law enforcement boat is reduced as much as possible, the high-speed law enforcement boat has the functions of overload early warning and breaking thin ice layer, the high-speed running performance and protection capability of the high-speed law enforcement boat can be effectively improved, and the safety and reliability of the high-speed law enforcement boat running can be improved.

Disclosed in the present invention is a hull form of a shallow-draft anti-rolling transport vessel. The hull form comprises a stern section, a cargo hold section and a bow section which are connected in sequence, wherein the length of the stern section does not exceed 30% of the overall length of a vessel; the length of the bow section does not exceed 25% of the overall length of the vessel; the stern section uses a multi-hull structure; the cargo hold section uses a monohull structure; the bottom of the cargo hold section is of a double-bottom structure; the bow section uses a catamaran structure; side flare structures are arranged at both sides of the stern section and the bow section; the stern section, the cargo hold section and the bow section share a main deck; and the main deck is a flat grillage. In the present invention, by means of reducing the draft, a wetted surface area and a wave height during high-speed navigation are reduced, thereby greatly reducing wave-making resistance; and the stability and seakeeping performance of the vessel under severe sea conditions are also taken into account.

The support structure (4) of the floating offshore platform includes a transverse member (8) formed of one or more pipes (10) with tanks (12) partitioned inside the transverse member (8), and at least one bolted flange connection (16) connecting the end of one pipe (10) of the transverse member (8) to another structural element (6) of the support structure (4), wherein each bolted flange connection (16) includes a first flange (20) and a second flange (22) together bolted by bolts (24), and the at least one bolted flange connection (16) is sealed by a sealing assembly (32) which includes at least one sealing member (34) configured to seal the bolted flange connection (16).

A watercraft including a board having a top surface and a bottom surface and a hydrofoil attached to a strut. The strut attaches at the bottom surface of the board. The watercraft includes a movable portion coupled to the top surface of the board such that the movable portion is configured to move relative to a fixed portion of the board.

The invention relates to a water sport device, in particular a foilboard, comprising a floating body (4), preferably in the form of a floating board, and a foil device (6) which is secured to the floating body (4) by means of a retaining device (8), wherein the foil device (6) arranged on a link (10) of the retaining device (8) has at least one, preferably at least two foils (16), and the foil device can be transferred via the retaining device (8) from an idle and / or starting position close to the floating body (4) into an operating position below the floating body (4), wherein, in the operating position and during a forward movement, due to an uplift force caused by the foil device (6), the floating body (4) can be transferred into a position in which it is spaced apart from the surface of the water, wherein at least one propulsion device (50) is provided which has at least one motor designed preferably as an internal rotor, which can be controlled by means of a control unit and which is provided for propelling the water sport device and designed in particular at least partially as part of the foil and / or retaining device (6, 8) or arranged on one of these or between these.

The invention concerns a hull structure (10, 100, 80, 200) for a semi- submersible wind power turbine platform (50), wherein the hull structure (10) comprises: a centre column (4) configured to support a wind power tower (20) provided with a wind turbine (30), the centre column (4) being located in a central region of the hull structure (10, 100); first, second and third buoyancy structures circumferentially distributed around the centre column (4) comprising first, second and third elongated structures (5, 6, 7) connected to the centre column (4) and extending outwards in different radial directions from the centre column (4, wherein the first elongated structure (5) is located at a higher level than the second and / or third elongated structures (6, 7) so that a lower side (5A) of the first elongated connection structure (5) is located above or is substantially aligned with an upper side (6B, 7B) of at least one of the second and third elongated connection structures (6, 7).

The present disclosure provides an inflatable white water kayak (hereinafter referred to as the kayak) with a narrow hull and a U-shaped bottom, which is a high-pressure narrow-type bottom weighted boat, and belongs to the field of portable packrafts. The high-pressure narrow-type bottom weighted boat includes an inflatable and deflatable tubular body, where the tubular body includes a bow, a middle segment, and a stem; the bow, the middle segment and the stern are connected sequentially; the middle segment includes a bottom plate and two side tubes; the two side tubes are symmetrically disposed at two sides of the bottom plate; the bottom plate and the two side tubes define a central seating area; the side tube includes at least two sidewall subtube portions; for the single side tube, the sidewall subtube portions are connected sequentially along a vertical direction to form a whole; a section of the side tube along a direction perpendicular to a central axial direction of the side tube is elliptical or quasi-elliptical; the side tube is combined with the bottom plate; and a section of the middle segment along the vertical direction is quasi-U-shaped.

Offshore floating structure may include one or more mooring lines coupled to an elongated base for anchoring the elongated base to a sea floor. Offshore floating structure may further include a mounting platform coupled to the elongated base and configured to removably couple one or more power support components for supporting one or more offshore operations. The one or more power support components may comprise one or more renewable energy power sources, one or more alternative power sources, one or more power storage systems configured to store and provide energy generated from the one or more renewable energy power sources or the one or more alternative power sources, and one or more electric charging stations configured to receive the energy generated from the one or more renewable energy power sources or the one or more alternative power sources. Offshore floating structure may be manually, remotely, and / or autonomously operated.

A floating body platform and a photovoltaic power generation system are provided. A floating body platform according to an embodiment of the present invention includes a plurality of socket frames on which floating bodies are installed, and a plurality of connecting frames configured to connect the plurality of socket frames, in which the plurality of socket frames and the plurality of connecting frames are connected to each other to form a plurality of floating body unit groups each having a hexagonal truss structure.

The present invention relates to a ship flow control system having a pre-swirl flow control fin, wherein a swirl flow is generated opposite to the propeller rotation direction such that the ship propulsion efficiency is improved without increasing cavitation and hull fluctuation pressure occurring in the upper portion of the starboard of the ship. The ship flow control system comprises a flow control fin installed in a curved portion of the stern of the port side of the ship positioned in front of the propeller so as to be inclined toward the lower side with respect to the basic flow direction of seawater, thereby inducing the seawater flow direction to face the lower side of the propeller. By generating a swirl flow in the counterclockwise direction, which is opposite to the propeller rotation direction, such that the ship propulsion efficiency is improved without increasing cavitation and hull fluctuation pressure occurring in the upper portion of the starboard of the ship.

This utility model relates to the field of aquaculture vessel technology, specifically a marine aquaculture tool vessel. It has a hull, and its characteristic is that floats are installed on the left and right sides of the bottom of the hull, and a drive chamber with a rear end opening is provided on the rear side of the float. A propeller is installed in the drive chamber via a bracket. A water inlet is provided on the side wall of the drive chamber near the front of the propeller and close to the inner side of the hull. The propeller is connected to the output end of the driver. It has the advantages of simple structure, low resistance, high safety performance, high stability, and the propeller is not easy to get tangled.

The invention relates to a watercraft (100) comprising a support element (1, 1'), in particular in the form of a support platform or a supporting frame (1.1, 1.1'), for carrying a load, a buoyancy generator (2) for generating a buoyancy force acting on the watercraft (100), and an internal or external drive system (3) for moving the watercraft along a travel direction (10), wherein the buoyancy generator (2) is a temporary buoyancy generator (2). The invention further relates to a method for operating a watercraft (100).

An improved floating structure attachment device comprising a vertically oriented guide member secured to a fixed structure, a dimensional joining block slidably coupled to the guide member, and a horizontally oriented attachment member extending through the joining block secured to a floating structure. The joining block defines intersecting vertical and horizontal passages dimensioned to permit controlled clearance sufficient to prevent binding while substantially limiting excess movement. The device provides four-dimensional freedom of movement, including vertical translation, horizontal translation, rotation about multiple axes, and limited angular pitch, while remaining structurally rigid and free of spring-biased elements.

The utility model discloses a kind of hydrofoil unmanned ships, including hull, tail rudder, motor, hydrofoil, motor connecting frame and steering gear, wherein hull is streamline design, and there is the interface of hydrofoil on hull;Steering gear is arranged in the tail of hull, and rocker is installed on the steering gear, to control tail rudder;Through hole is arranged in the bottom surface of hull, and the upper and lower surfaces of motor connecting frame are both provided with through hole, to realize the connection of connecting frame and hull, the connection of motor and connecting frame;Through hole is arranged in the inside of hull to cooperate with hydrofoil to be connected by short pin, to realize the cooperation of hydrofoil and hull.In the process of advancing, steering gear controls rocker to control tail rudder to realize the steering of unmanned ship, and motor rotation generates propulsive force to control the sailing speed of ship to control the lift obtained by hydrofoil.