24results about "Stern posts" patented technology

A stern operatively mounted universal transducer for boat includes a mounting device, having upper and lower brackets, for securement to the boat, preferably its transom, the upper and lower brackets secure a drive cylinder, which when operative, lowers a drive rod for shifting a sonic transducer upwardly above the water, or downwardly into the water to scope the surrounding underwater typography. A pair of guide rods shiftably extend through the upper and lower brackets, and at their upper ends, secure to a motor and gear housing, the guide rods at their lower ends secure to a base plate. A transducer shaft extends into the motor housing which provides for its pivoting, and at its lower end, extends downwardly through the base plate, and secures a transducer mounting plate, to which the transducer is affixed, in preparation for its usage. Electrical, pneumatic, or hydraulic pressure can be used to pivot the transducer shaft, and to raise and lower the base plate that connects with the drive shaft, the latter when operative, raises or lowers the entire transducer assembly into and out of the water, during application.

The application relates to the technical field of ship equipment, and discloses a rudder heel structure and a rudder system, the rudder heel structure comprising a middle longitudinal plate, a plurality of transverse partition units, a platform plate and a plurality of shell side plates; the transverse partition unit comprises a transverse partition plate and a first plug welding backing plate; the rudder system structure comprises a rudder blade assembly and the rudder heel structure, the rudder blade assembly comprising a connecting piece, the device divides the middle longitudinal plate into a first segment and a second segment, and connects the first segment and the second segment through the connecting piece on the rudder system, so that the strength of the middle longitudinal plate is guaranteed, and the installation of the transverse partition plate, the platform plate and the shell side plate can be simultaneously performed in two groups, the assembly period is shortened, sufficient construction space is provided for construction personnel, the assembly difficulty is reduced, in addition, the device uses the first plug welding backing plate to replace plug welding holes, the welding strength is enhanced, the welding quality of the shell side plate is guaranteed, the time consumed for polishing the plug welding holes is avoided, and the assembly efficiency is improved.

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.

The present invention relates to a submersible stern platform (100) provided with a recreation device (200), comprising at least one recess (110) in which is arranged a recreation device (200) pivoting from the recess (110) between an initial or closed position and a final or open position. A submersible stern platform (100) provided with a recreation device (200) and a sliding backrest (300) is also presented.

The invention relates to a structured sheet-metal profile (10) for a load-bearing structure, in particular for a boat hull, the structured sheet-metal profile comprising: - a profiled metal sheet (18), which is bent at bend lines (17) and can be inserted between two parallel adjacent framing regions of the load-bearing structure and can be fastened to the framing regions, wherein the profiled metal sheet (18) comprises on its upper face (21) an upper profile hole grid (110); and - an upper cover element, which comprises an upper cover element hole grid and is placed on the profiled metal sheet (18), wherein the upper profile hole grid (110) and the upper cover element hole grid are aligned with one another and connected via fastening means. Here, the upper cover element and / or the bent profiled metal sheet comprises support surfaces (19) to be placed on the two framing regions, - the upper cover element hole grid and / or the upper profile hole grid (110) are provided for alignment on framing region hole grids of the framing regions and for connection to the framing region hole grids of the framing regions via fastening means.

The invention discloses a wind-propelled ammonia dual-fuel bulk cargo ship which comprises a ship body, a cargo hold, a superstructure, a fuel oil power device, an ammonia fuel power device and a wind power device, the fuel oil power device and the ammonia fuel power device are arranged on the stern of the ship body, the wind power device is arranged on the front portion of the ship body, and the stern of the ship body is of a full-width structure; the ammonia fuel power device comprises an ammonia fuel equipment room and a plurality of ammonia fuel storage tanks, the ammonia fuel storage tanks are symmetrically arranged on the two sides of the stern of the ship body, and the superstructure and the ammonia fuel equipment room are arranged among the ammonia fuel storage tanks which are symmetrically arranged; a plurality of cargo holds are arranged in sequence from the ammonia fuel power device to the bow of the ship body; the wind power devices are arranged between the adjacent cargo holds. By adopting the layout mode, the layout is more compact and reasonable, and the influence of each device on cargo loading and unloading is avoided while the loading capacity of the ship is improved.

The present invention provides a design method for an intelligent active stern energy-saving and drag-reducing device. The method specifically comprises: S1: designing the shape of the stern drag-reducing device and determining the parameters of the drag-reducing device; S2: geometrically modeling the ship's resistance by varying the downtilt angle a; S3: performing array calculations: setting an objective function f=min{R(a)} and calculating the minimum stern resistance under different speeds V and different drafts T; S4: establishing an optimal downtilt angle matrix, wherein the rows of the matrix represent the speed V and the columns represent the draft T; S5: performing model tests; S6: experimentally verifying and revising the optimal downtilt angle matrix; and S7: integrating the optimal downtilt angle matrix into the software and hardware control system of the stern drag-reducing device to adjust the downtilt angle a to achieve optimal drag reduction at different speeds and drafts. The present invention has a wide range of applications and exhibits good drag reduction effects for ships at different speeds and drafts, i.e., different cargo loads, in actual operation.

The utility model discloses a boat-shaped structure of a high-speed rescue boat, which belongs to the technical field of high-speed boats and is characterized by comprising a boat body, a bow of the boat body is V-shaped, a first break angle and a second break angle are arranged on the bottom surface of the boat body, the first break angle is positioned above the second break angle, the first break angle extends from the stern of the boat body to the bow of the boat body, and the second break angle extends from the bow of the boat body to the bow of the boat body. The first bevel extends from the bow of the boat body to the stern of the boat body, the second bevel extends from the bow of the boat body to the stern of the boat body, the first bevel and the second bevel are symmetrically distributed along the center line of the boat body, and the boat-shaped structure can change the flowing state of water flow at the bottom of the boat body through the first bevel and the second bevel, so that the water flow can be separated more smoothly when flowing through the boat body, and the resistance of the boat body during movement is reduced; and the bevel I and the bevel II can guide water flow to flow along corresponding paths, so that the water flow forms more concentrated and stable wake flow at the stern of the boat body, the resistance can be further reduced, the stability of the boat body is improved, and the sailing efficiency is improved.

The invention relates to a stern form for a ship propeller, applicable to the hull of single- and multi-propeller ships with a central propeller, characterized in that the cross- sections of the ship's hull, referenced as sections 8, ½, and 9, are modified in the parts between the reference lines A and B of the lines plan, shifting aft of the propeller the bulge necessary to house a shaft and a supporting bearing for the propeller itself, allowing a reduction of the hull's wetted surface, a decrease in fuel consumption, and an improvement in overall propulsive efficiency.

The invention discloses a high-speed quadruple ship structure, and belongs to the technical field of ship engineering. The high-speed quadruple ship comprises two bow and stern catamarans which are the same in size and are symmetrically arranged. Each bow and stern catamaran comprises a bow piece body and a stern piece body, and the bow piece bodies and the stern piece bodies are arranged at intervals in the longitudinal direction; a continuous main deck is arranged above the two bow and stern catamarans, the main deck covers a central area defined by the four sheet bodies, and the sheet bodies are connected with the main deck through independent damping structures. Through differentiated design of the front sheet body and the rear sheet body and optimized sheet body layout, on the premise that the displacement is kept equivalent to that of a catamaran, the total width of the ship body is remarkably increased, the transverse stability and the deck area are improved, meanwhile, the hydrodynamic performance is optimized, the high-speed high-sea-condition maintaining capacity is high, the wave impact load is greatly reduced through a damping system, and the service life of the catamaran is prolonged. Hull movement is inhibited, and good compatibility of high navigational speed and high stability is achieved; and rapid large-scale construction is facilitated.

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.

The utility model discloses a composite type tail column structure which comprises a propeller column and a tail hub connected to the propeller column. The propeller column comprises a tail column inner supporting frame, and the tail hub comprises a shaft hub. The thruster column further comprises a first marine composite component as a thruster column shell; the first marine composite material component is fixed outside the supporting frame in the tail column; the tail hub further comprises a second marine composite material component serving as a tail hub shell. The shaft hub is sleeved with the second marine composite material component; the second marine composite material component is fixed outside the shaft hub; the shaft hub is fixedly connected to a supporting frame in the tail column; the tail column internal supporting frame is fixedly connected to a ship shell plate. According to the utility model, the processing difficulty is reduced, and the propulsion efficiency is improved.

The invention discloses a structure for connecting outboards on two sides of a sternpost through round steel and an installation method. The top ends of the outboards on the two sides are each cut to form a groove of 20-40 degrees, angles are set according to the center line of a board and a ship body, the outboards on the two sides are installed, the round steel is placed on the tops of the outboards on the two sides, and the round steel is adjusted to be tangent to extension lines of the outer surfaces of the outboards; a steel gasket is welded between the round steel and the outboard plate groove, so that the round steel, the steel gasket and the outboard plate are welded into a whole; and after welding, the surface of the weld joint is polished, so that the outer end face of the weld joint is in smooth transition with the round steel. According to the method, the connection reliability of the outboard can be effectively improved, the problem of weld cracks caused by stress concentration and the like is reduced, and the service life of a ship is prolonged. The connecting strength between the outboard and the round steel is enhanced, the stability of the overall structure of the outboard on the two sides of the ship column is improved, the ship column can better bear various loads in the operation process of a ship, and the safety of the ship is guaranteed.

The invention provides an underwater vehicle stern noise reduction design method, an acoustic metamaterial and an underwater vehicle, and relates to the technical field of underwater vehicles, and the underwater vehicle stern noise reduction design method comprises the following steps: obtaining body noise generated when a propeller of the underwater vehicle works, the pulsating load generated by the propeller is transmitted to the shell through the shaft system or directly excites the shell to generate vibration information; the radiation noise of the stern shell is determined according to the vibration information; the target structure type and target characteristic parameters of the acoustic metamaterial are determined according to the body noise, the stern shell radiation noise and the to-be-controlled sound wave frequency band, and the reverse sound wave is obtained after the stern shell radiation noise is deflected by the acoustic metamaterial. According to the underwater vehicle stern noise reduction design method, the design parameters of the acoustic metamaterial can be determined, so that after the acoustic metamaterial is laid on the surface of the underwater vehicle stern shell, reverse sound waves and propeller body noise can be superposed to generate destructive interference, and the noise is reduced.

An energy-efficient ship is powered using at least one propulsion level having a large grid at the bow and stern ends of the ship for each propulsion level and side channels incorporating turbines that move water through the ship rather than around the ship, thereby achieved by significantly reducing wake and cavitation that waste energy.

A vessel, comprising a deckhouse (3), wherein ballast water tanks (7) are arranged on two sides below the deckhouse (3); a gravity tank (8) is arranged in the middle between the ballast water tanks (7) on the two sides; an air chamber (9) is provided between each of the ballast water tanks (7) on the two sides and the gravity tank (8); a watertight compartment (23) is provided below the tank bottom of each ballast water tank (7); a pressure-boosting bulkhead (48) is provided below each watertight compartment (23); a vertical surface of each pressure-boosting bulkhead (48) is provided with a pressure-equalizing opening (17); an arched gravity block (14) is provided below each pressure-boosting bulkhead (48); flow diversion plates (4) are arranged on a bow (2) in a manner of extending downwards and backwards; a dual-flow conversion plate (18) is arranged between the tank bottom of the gravity tank (8) and an enclosure plate; a pressure-balancing pocket (49) is provided on the inner lower edge of each air chamber (9) from an intersection point in the air chamber (9) below an outer hull board (6) of the bow (2) backwards to a junction point at the compartment bottom of the corresponding watertight compartment (23); and a combination of a dual-flow conversion force and propellers (25) is used for improving the traveling speed of the hull (1) of a flat structure.

The utility model discloses a hull structure and a ship, and belongs to the technical field of hull structures, the hull structure comprises a structural frame and a stern shaft bracket, the structural frame is provided with a first cavity, and a connecting part filled with epoxy resin is arranged in the first cavity; the stern shaft bracket comprises a support and a shaft hub, the support comprises a second end and a first end with a T-shaped section, and the second end is fixedly connected with the shaft hub; the first end is located in the first cavity and completely wrapped by the connecting part, and the first end is fastened to the structural frame through the connecting part. The hull structure solves the problem that a structural frame needs to be repeatedly polished when the stern shaft frame is installed, and the effects of shortening the manufacturing period of a hull and reducing cost are achieved.

A pedal assembly and steering assembly are disclosed for converting an inflatable, drop stitch paddle watercraft into a pedal watercraft. The pedal assembly includes a mounting plate and mounting bracket for supporting a geared drive shaft in an opening extending through the floor of the watercraft. The steering assembly includes a rudder connected to a tiller through push pull cables.

The invention relates to an aft support structure for a ship propeller, applicable to single- or multi-propeller ships, wherein said aft structure comprises a support (10) for the ship propeller, said support (10) being positioned aft of the propeller (21) and configured to support a boss (17) integral with the support (10) itself and housing a propeller bearing (19) to allow rotation of a propeller hub (22) of the propeller (21), the support (10) having a hydrodynamically streamlined section aligned with a rudder blade (15) to reduce vortex formation and resistance to ship advancement, characterized in that said support (10) is separate from the said rudder (15).

In order to improve the hydrodynamic efficiency of a ship, a rudder stock (100) for a ship (13) is proposed, comprising a rudder stock tube (10), a receiving shaft (11) and a retainer (20) for holding the rudder stock tube (10) in the receiving shaft (11), wherein in the state in which the rudder stock tube (10) is arranged in the receiving shaft (11), an intermediate space (19) is provided between the rudder stock tube (10) and the receiving shaft (11), wherein the retainer (20) comprises at least one retainer element (21, 21a, 21b, 21c, 21d) and at least one complementary retainer workpiece (22, 22a, 22b, 22c, 22d), wherein the at least one retainer element (21, 21a, 21b, 21c, 21d) is arranged on the rudder stock tube (10), wherein the at least one complementary retainer workpiece (22, 22a, 22b, 22c, 22d) is arranged at the receiving shaft (11), and wherein the at least one retainer element (21, 21a, 21b, 21c, 21d) and / or at least one complementary retainer workpiece (22, 22a, 22b, 22c, 22d), in the state in which the rudder stock tube (10) is arranged in the receiving shaft (11), protrude into the intermediate space (19).

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 stern 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 vessel, comprising a deckhouse (3), wherein ballast water tanks (7) are arranged on two sides below the deckhouse (3); a gravity tank (8) is arranged in the middle between the ballast water tanks (7) on the two sides; an air chamber (9) is provided between each of the ballast water tanks (7) on the two sides and the gravity tank (8); a watertight compartment (23) is provided below the tank bottom of each ballast water tank (7); a pressure-boosting bulkhead (48) is provided below each watertight compartment (23); a vertical surface of each pressure-boosting bulkhead (48) is provided with a pressure-equalizing opening (17); an arched gravity block (14) is provided below each pressure-boosting bulkhead (48); flow diversion plates (4) are arranged on a bow (2) in a manner of extending downwards and backwards; a dual-flow conversion plate (18) is arranged between the tank bottom of the gravity tank (8) and an enclosure plate; a pressure-balancing pocket (49) is provided on the inner lower edge of each air chamber (9) from an intersection point in the air chamber (9) below an outer hull board (6) of the bow (2) backwards to a junction point at the compartment bottom of the corresponding watertight compartment (23); and a combination of a dual-flow conversion force and propellers (25) is used for improving the traveling speed of the hull (1) of a flat structure.

A pedal assembly and steering assembly are disclosed for converting an inflatable, drop stitch paddle watercraft into a pedal watercraft. The pedal assembly includes a mounting plate and mounting bracket for supporting a geared drive shaft in an opening extending through the floor of the watercraft. The steering assembly includes a rudder connected to a tiller through push pull cables.

Water craft comprising a hull (1), with an opening (4) and a lowerable segment (7) arranged in said opening. The lowerable segment (7) is coupled to the hull (1) via a lifting mechanism (8) for lowering or raising the lowerable segment (7) with respect to the hull (1) between - a first position in which an outer surface (9) of a bottom wall of the segment is substantially flush with the outer surface of a bottom (5) of the hull adjacent to the segment, and - a second position wherein the segment (7) is arranged below the water line (11) of the hull (1). The lowerable segment comprises a lower watertight compartment (13) and an upper compartment (14) that can at least partially be filled with water when the segment (7) is lowered, and can be drained when the segment is raised. When in the first position, a wall between the lower and upper compartment is arranged at a level at or near the water line (11).