8results about "Stern posts" patented technology

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 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.

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 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).

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).