36results about "Stern posts" patented technology

A device (100), for the checking and measurement of the journal bearing clearance between the outer bearing on the rudder shaft (25) of a rudder for water-borne craft and the inner bearing (32) on the rudder trunk (20) corresponding with the outer bearing (31), is characterised by a measurement rail (70) made of a springy elastic material having internal stiffness, which can be introduced by means of a guide rail (60), provided with a grip-type handle (61), into the gap between the outer bearing and the inner bearing and hence into the clearance measurement region, with a measurement probe (80) located at its free end (70a) for the clearance width measurement, wherein the measurement rail (70) with the measurement probe (80) with a prescribed thickness (a) are exchanged for measurement rails with measurement probes with other thicknesses until the achievement of an agreement of the clearance width with the thickness of a measurement rail (70) with the measurement probe (80).

The invention relates to a rudder for marine vessels having a rudder shaft which is arranged on a marine vessel hull such that it can pivot about a rotation axis, having a rudder blade which is connected to the rudder shaft and can pivot about the rotation axis with respect to the marine vessel hull, and having at least one bearing for bearing the rudder blade or rudder shaft on the marine vessel hull, wherein the bearing has an inner bearing section and an outer bearing section, which rests such that it can slide on the inner bearing section. The invention provides for a closure pin (4, 4'), which is arranged on one of the outer bearing section (210) or inner bearing section (220) to rest such that it can slide on the other of the inner bearing section (220) and outer bearing section (210).

The invention discloses a sharp-bilge planing boat type with constant wetted length. A boat body curved surface is a fairing space closed curved surface formed in a controlling mode with a designed water line, a midship longitudinal section line, an angle folding line, an upper boundary line, a stern transverse section line, a midship section line, a folding angle line longitudinal inclined angle, a stern inclined rising angle and a midship inclined rising angle as characteristics. The sharp-bilge planing boat type has the advantages that the wetted length is constant and unchanged no matter how the ship state changes at various kinds of ship speed; the resistance performance is greatly reduced than that of a traditional planing boat when sailing in states of water draining, transiting and taking off; the resistance performance is close to that of the traditional planing boat when sailing in a planing state; maneuverability, seaworthiness and seakeeping are greatly improved. The sharp-bilge planning boat type can be used in sea conditions 1-2 grades higher than the traditional planing boat. Further, due to the fact that the wetted length remains unchanged, the sharp-bilge planning boat type is more favorable for people to utilize the length Froude number to analyze and study the performance of the sharp-bilge planning boat type theoretically.

The invention relates to a rudder for ships with propeller drive, in which the propeller is arranged to rotate about a propulsion axis, with a rudder blade (15) and a flow body (20) arranged on the rudder blade (15), whereby the flow body designed in a bulb or zeppelin shape is arranged as an extension of the propulsion axis in the region of the rudder blade and is designed to self-destruct or self-detach in the event of an increase in the effect of force, blow, impact or pressure.

The invention discloses a ship with a knuckle line and an internal rotational fin tail, and belongs to the technical field of ships. The ship comprises a propeller, and the knuckle line is arranged on the basis of a ship with an internal rotation fin tail and positioned on the outer side of a shaft of the propeller along the length direction of the ship. The ship has the advantages that longitudinal flow and lateral flow can be guided, and a flow regulating effect can be achieved.

In order to achieve a connection between a nozzle shaft (20) and a nozzle ring (10) that has the simplest design possible, while at the same time being stable, in a propeller nozzle (100) for a watercraft which comprises a fixed propeller (30) and a nozzle ring (10) surrounding the propeller (30), said nozzle ring being pivotable by means of a nozzle shaft (20), the nozzle shaft (20) is designed as a hollow body.

A propeller arrangement (100) for a marine vessel, the propeller arrangement (100) comprising a propeller (110), a propeller shaft assembly (120) comprising a shaft portion (122) extending from a distal side of the propeller (111), a support member (130) arranged to be connected to a hull (2) of the marine vessel, and a bearing arrangement (140) interconnecting the support member (130) and the shaft portion (122). The propeller arrangement is characterized in that the support member (130) comprises at least one cooling fluid conduit (131 ) for accommodating and circulating a first cooling fluid within the support member (130) and further to the shaft portion (122) and / or to the bearing arrangement (140).

The present invention relates to a stern tube bush unit. When assembling the stern tube bush unit onto a hull, the rear surface of the stern of the hull and the rear surface of a first bush housing are disposed on the same plane, for coupling, and a rubber sponge is mounted between the bush housing and the hull for retaining sealing resin. Therefore, it is possible to increase the use of space at the rear side of the stern of the hull, and increase the sealing force of the resin which is filled between the hull and the bush housing. In addition, it is possible to firmly mount the stern tube bush unit at the precise position in the hull through a stable structure in a short time.

The invention discloses a back-hydrofoil high-speed wing rowboat, which comprises a boat body and a motive power device, wherein the bottom of the back end of the boat body is in an integral step lifting in a step shape, the bottom linetype of a front boat body is backwards and gradually transited to the shallow V-shaped transverse cross section from the V-shaped transverse cross section of a boat bow part, and then, the bottom linetype of a back boat body is in a horizontal or shallow reverse V-shaped or shallow reverse circular arc-shaped transverse cross section until the bottom linetype of the bow part of the back boat body is in a horizontal or shallow V-shaped transverse cross section. A back hydrofoil is arranged under the bottom of the back boat body, and two pairs of sheet bodies with tapered wing-shaped transverse cross section in horizontal staggered and transverse symmetry in the longitudinal direction respectively and obliquely extend from two sides of the front boat body. The back-hydrofoil high-speed wing rowboat has the advantages that the splashing kinetic energy of the sliding surface fluid can be better absorbed, and the comprehensive performance of the rowboat is better than that of a planing boat and a gliding-hydrofoil boat. The rapidity of the rowboat is improved by more than 10 percent than that of the planing boat, meanwhile, the transverse and longitudinal stability of the rowboat is greatly improved than that of the planing boat and the ordinary gliding-hydrofoil, and in addition, good character that the planing boat can surf the beach is reserved.

The invention provides a manufacturing method of a large tail casting structure of a ship. The manufacturing method includes the following steps that the large tail casting structure of the ship is transversely broken to form an upper part and a lower part, and the upper part and the lower part are cast separately; a jaw-shaped connecting frame is arranged between the upper part and the lower part; and the upper part and the lower part are welded to the jaw-shaped connecting frame to form the tail structure of the ship. By means of the manufacturing method, a large casting can be precisely machined, the manufacturing period is short, and the cost is low.

The invention relates to a three-hull planing boat provided with a groove channel wave suppression plate, and belongs to the technical field of planing boat equipment. According to the three-hull planing boat provided with the groove channel wave suppression plate, the longitudinal trim of the boat is adjusted through the wave suppression plate, so that the three-hull planing boat crosses the lowspeed resistance peak value more quickly, in a high speed stage, the inner pressure of a groove channel is further increased by adjusting the wave suppression plate, thus the rising height is increased, the wet surface area is decreased, and a higher boat speed can be obtained; and the problems that adjusting of the three-hull planing boat is slow in a low-speed sailing stage and resistance is excessively high in a high-speed sailing stage are solved.

The invention provides water bulk cargo transporting equipment applicable to coastal water areas and south areas of China. The water bulk cargo transporting equipment is a ship comprising a stem, a midship part of a ship body, a stern and a cargo space, wherein the ship includes length between vertical lines, molded breadth and moulded depth; and the product of sum of the length between the vertical lines and the molded breadth is 405 to 450 times of the moulded depth. The water bulk cargo transporting equipment is a shallow-draft ship applicable to coastal water areas, so that the loss for detention of the ship due to the influence from tidewater during leaving a port can be reduced; the water bulk cargo transporting equipment adopts straight stem to replace a bulbous stem of common ship, so that the difficulty in the construction of manufacture can be reduced; and with the curved surface on the appearance, the water bulk cargo transporting equipment can reduce the wave-making resistance of the ship.

A device (100), for the checking and measurement of the journal bearing clearance between the outer bearing on the rudder shaft (25) of a rudder for water-borne craft and the inner bearing (32) on the rudder trunk (20) corresponding with the outer bearing (31), is characterized by a measurement rail (70) made of a springy elastic material having internal stiffness, which can be introduced by means of a guide rail (60), provided with a grip-type handle (61), into the gap between the outer bearing and the inner bearing and hence into the clearance measurement region, with a measurement probe (80) located at its free end (70a) for the clearance width measurement, wherein the measurement rail (70) with the measurement probe (80) with a prescribed thickness (a) are exchanged for measurement rails with measurement probes with other thicknesses until the achievement of an agreement of the clearance width with the thickness of a measurement rail (70) with the measurement probe (80).

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 invention discloses a ship stern post, which comprises an outer plate, a shaft hub and round steel, and one end of the shaft hub extends out of the outer plate and is used for being connected with a propeller of a ship; the round steel extends along the outer contour line of the outer plate; the outer plates comprise the first outer plate and the second outer plate, the end face of the first outer plate and the end face of the second outer plate are connected with the outer wall of the round steel, and the diameter of the round steel is larger than the wall thickness of the first outer plate or the second outer plate. By adopting the invention, the tail end connecting position of the outer plate is moved forwards, namely, the connecting position of the original middle longitudinal section is moved to the position tangent to the outer edge of the round steel. According to the structure, the internal operation space of the ship body is increased, and the construction manufacturability is effectively improved. In addition, the round steel replaces a part of the outer plate, correspondingly, the size of the outer plate is reduced, and therefore the machining difficulty of the outer plate is lowered, especially the outer plate with the tail portion provided with bidirectional curvature.

An asymmetrical stern structure of a ship includes the hull, A stern is arranged at the bottom of the hull, A longitudinal section of that stern of the ship is in the shape of a dagger, the longitudinal centerline of the stern of the ship is shifted toward one side of the hull, the stern of the ship comprises a hub cast steel piece, the hub steel casting includes an integrally formed first portionand a second portion, A lateral cross-section of that first portion and the second portion are U-shape and opposite in direction, A longitudinal section of that first portion is rectangular and radiated at both ends; At first, that width of the longitudinal section of the second part increase and then decreases along the longitudinal cent line, A tail shaft of a propeller is arrange in that middle of the shaft hub cast steel part, the tail shaft of the propeller is positioned on the longitudinal centerline of the hull, and the front end of the tail shaft of the propeller is provide with a stern tube front support. The invention has the advantages of simple structure, reducing ship resistance, improving propulsion efficiency, reducing oil consumption and saving energy.

The invention discloses a line type of a supervise boat. A V-shaped break angle line type is adopted. The supervise boat comprises a main boat body. A rib frame composed of a plurality of ribs is arranged in the main boat body. Two watertight cabin walls are arranged at the positions #0 and #8 and divide the main boat body into a tail tip cabin from the stem to the position #0 and a passenger compartment and a cockpit from the position #0 to the position #8. A head tip cabin is arranged from the position #8 to the bow. A flat barge line type with a break angle is adopted for the stem. Ship sides on the two sides are transited to the bow in an upwarp mode. The rib frame structures of all parts on the ship sides are different. The structure of the line type of the supervise boat is optimized, and the wave-making resistance and viscous resistance of the boat body are effectively reduced.

The invention discloses an ice prying type icebreaking tug ship structure, and belongs to the technical field of ship manufacturing. The ice prying type icebreaking tug ship structure includes a shipframe, a half-row ice ship stern, a sharpened forward-leaning type ship bow and a main deck; the half-row ice ship stern includes a stern inclined outer plate and a stern drum, the sharpened forward-leaning type ship bow includes a bow inclined outer plate and a lifting main deck, and the ship frame includes a longitudinal frame, a transverse bulkhead and a water-tight transverse bulkhead; and anincluded angle between the stern inclined outer plate and the horizontal plane is alpha degrees, an included angle between the bow inclined outer plate and the horizontal plane is beta degrees, wherein the alpha degrees are 17 degrees, and the beta degrees are 25 degrees. According to the ice prying type icebreaking tug ship structure, the included angle between the bow inclined outer plate and the horizontal plane is beta degrees, the requirement of an icebreaking grade is met, and broken ice smoothly entering the bottom of a ship and being discharged through the tail part is facilitated; andthe included angle between the stern inclined outer plate and the horizontal plane is alpha degrees, the smooth discharging of the broken ice along the stern inclined outer plate is facilitated, andthe damage to a propeller due to the fact that the broken ice is separated from the ship outer plates is prevented.

The invention discloses an open tunnel ship type reversing performance enhancement method and device. In order to form a tail-closed structure similar to a closed tunnel at the tail of a ship body, one device needs to be added, a closed space can be formed at the tail of an open tunnel during reversing, air in the upper portion of the tunnel is evacuated to form vacuum, the closed space sucks water and is filled with the water, and all screw propellers are immersed in the water during reversing. The device needs to be opened during advancing, and backward drainage of the tunnel cannot be affected. The requirements are combined, a turnover baffle plate is additionally mounted at the back of a tail sealing plate and pushed open by backward water flow during advancing, and the shape of the open tunnel is ensured. The reversing performance enhancement device with simple structure, high efficiency and low cost is provided for shallow draught ships constrained, controllability of open tunnelships can be effectively improved, and the low-priced device for efficiently enhancing ship reversing performances can be provided for future similar ships by project implementation.

The invention discloses a light-weight electric unmanned emergency rescue ship and an emergency rescue operation method, and belongs to the field of rescue equipment. The rescue ship comprises a ship body and a stern frame assembly which are of an assembled structure; the ship body is an inflatable ship body, an inflation inlet is formed in the upper end of the ship body, an electric control unit is arranged at the rear end of the middle area of the ship body, an electric propeller connected with the ship body through a watertight plug, and a remote control system is connected; the stern frame comprises a fixing frame, and the electric propellers are arranged on the lower portions of the two sides of the ship body. Supporting frames are arranged on the two sides of the end, away from the ship body, of the fixed frame, an adjusting rod is hinged to the middle of the fixed frame, and a retractable spring is arranged between the middle of the upper end face of the adjusting rod and the upper ends of the supporting frames so that the adjusting rod can be switched between the upward lifting state and the vertical downward state. The end, away from the supporting frame, of the adjusting rod is rotationally connected with a stern wheel, and when the adjusting rod is in a vertically-downward state, the lower end face of the stern wheel is lower than the lower end face of the ship body. The rescue ship can be rapidly installed, is good in portability, is convenient to transfer, and is also suitable for a rapid driving state in water.

A vessel for operation on a water surface, having a hull that creates a waveform that attracts aquatic animals such as dolphins when traveling at a speed of 9 to 13 knots. The hull comprises a bow, a rounded stern and a midship section extending from the bow to the stern. The hull has a ratio of a waterline beam to a radius of the stern in a range between 2.0-2.5, and a speed-to-length ratio in a range between 1.5-1.7 to create a soft, curling wake in which dolphins can surf and jump. The hull further has a length-to-beam ratio between 2.5 to 3.0, a flat bottom aft, a high deadrise at the bow, and a full midsection with a longitudinal center of gravity located 52% to 56% aft of a beginning of a waterline to result in a low prismatic coefficient of the hull.

The invention discloses a sharp-bilge planing boat type with constant wetted length. A boat body curved surface is a fairing space closed curved surface formed in a controlling mode with a designed water line, a midship longitudinal section line, an angle folding line, an upper boundary line, a stern transverse section line, a midship section line, a folding angle line longitudinal inclined angle, a stern inclined rising angle and a midship inclined rising angle as characteristics. The sharp-bilge planing boat type has the advantages that the wetted length is constant and unchanged no matter how the ship state changes at various kinds of ship speed; the resistance performance is greatly reduced than that of a traditional planing boat when sailing in states of water draining, transiting and taking off; the resistance performance is close to that of the traditional planing boat when sailing in a planing state; maneuverability, seaworthiness and seakeeping are greatly improved. The sharp-bilge planning boat type can be used in sea conditions 1-2 grades higher than the traditional planing boat. Further, due to the fact that the wetted length remains unchanged, the sharp-bilge planning boat type is more favorable for people to utilize the length Froude number to analyze and study the performance of the sharp-bilge planning boat type theoretically.