JPH01282086A - Marine vessel - Google Patents

Abstract

PURPOSE:To facilitate the planing of a marine vessel and to prevent the influence of a wave generated at a contact portion between surface of the water and a ship's bottom by providing plural bottom plates upward tilted on their bow sides from the bow to the stern, and arranging a propulsion device at a position nearer to the bow than the center of gravity of a hull to increase water pressure acting on the hull. CONSTITUTION:In the case where marine vessel speed caused by the propulsion force of a screw 18 is relatively slow, the first-the third bottom plates 6-8 are located below the surface of the water, and when a marine vessel is slowby accelerated to make the water strike against a hull, upward strong force is given to each of the bottom plates 6-8 to make most of the marine vessel rise above the surface of the water. In this case, relatively large wave W is generated at a contact portion between the surface of the water and each of the bottom plates 6-8, but since the bottom plates 6-8 are formed upward against a ship's bottom, a contact area between the wave W and each of the bottom plates 6-8 becomes narrower to reduce resistance caused by the wave W. Next, when the marine vessel is decelerated, a bow 9 gradually lowers to make each of the bottom plates 6-8 sink below the surface of the water, and air gathering in a corner 15 is therefore exhausted outside from a through hole 16. Thus the air contained in the ship's bottom can not increase the resistance against the hull.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a ship with an improved bottom.

(Prior Art) Conventionally, pleasure boats such as cruisers and rescue boats place emphasis on speed, and various boat shapes have been adopted in consideration of water resistance. The hull type is generally a so-called displacement boat, which excludes water equal to its own weight and separates the water when moving forward, but high-speed competition boats use a planing boat (hydroprene). . When the ship starts running, the front bottom is exposed above the water due to the water pressure, and the back bottom is in contact with the water and slides. is decreasing.

On the other hand, semi-displacement boats located between the above two types are also well known.

(Problems to be Solved by the Invention) In the above-mentioned prior art, the bottom of the ship is almost flat and the water pressure is low, making it difficult to slide. In addition, since the fore-bottom was exposed above the water, relatively large waves were formed where the water surface and the bottom of the ship met, and when these waves hit the bottom of the ship above the water surface, the boat faced great resistance. - The present invention has been made in view of the above-mentioned problems, and aims to provide a ship that increases water pressure to make it easier to plan, and is less affected by waves that occur at the point where the water surface and the bottom of the ship meet. do.

[Structure of the Invention] (Means for Solving the Problems) The present invention includes a plurality of bottom plates with the bow side slanted upward, and a plurality of bottom plates arranged from the bow side to the stern side. It is installed closer to the bow side of the ship.

(Function) In the present invention, when speeding up, the ship tends to tilt upward due to large water pressure, and due to the collision between the water surface and the bottom of the ship, waves tend to hit the bottom of the ship exposed above the water surface. Since the bottom plate itself faces upwards above the water surface, the distance from the water surface is large, reducing the surface area that collides with the waves and eliminating resistance. Also, by providing the propulsion device on the bow side, the ship can be propelled while keeping it in a stable state.

(Example) Next, embodiments of the present invention will be described with reference to the accompanying drawings.

Figures 1 to 4 show a first embodiment, in which outer panels 1 are provided on both sides, a deck 2 is provided above, and a bow board 3 is provided.
Furthermore, the stern plate 4 and the bottom 5 are firmly assembled by a keel (not shown) or the like.

The boat bottom 5 is made up of first to third boat bottom plates 6°7.8 arranged in parallel. That is, the first bottom plate 6 facing upward toward the bow 9 side has an elevation angle of 10 to 15 degrees, preferably approximately 12 degrees, and its tip is connected to the lower end of the bow plate 3 by the first rising wall 10.
They are connected via the . A second bottom plate 7 is stepped at the rear end of the first bottom plate 6 via a second rising wall 11. Furthermore, a third bottom plate 8 is obliquely provided at the rear end of the second bottom plate 7 with a third rising wall 12 interposed therebetween.

At the rear end of this third bottom plate 8 is a step 13 which is the stern.
Or is provided. Further, below both side edges of these first to third bottom plates 6, 7.8, rectifier plates 14 are formed extending from the lower ends of the outer plates 1, and each of the bottom plates 6, 7.
A through hole 16 is formed in each rectifying plate 14 to communicate the outside with a corner 15 formed by the rising wall 7.8 and each rising wall 10, 11, 12. Further, a rectifying plate 17 is also provided on the approximately medium heat of each bottom plate 6, 7°8.

In addition, 18 is a screw which is a rear propulsion device driven by the engine 19 provided in the step 13, and 20
is the rudder. Further, 21 is a driver's seat, and 22 is a fuel tank.

Next, the operation of the above structure will be explained.

When the speed due to the propulsive force of the screw 18 is relatively slow, the first to third bottom plates 6.7°8 are located below the water surface. As the speed gradually increases, as shown in FIG. 2, when water collides with the vessel, a large upward force is applied to each bottom plate 6, 7, 8, and most of the vessel is exposed above the water surface.

At this time, relatively large waves W are generated at the points where the water surface contacts each of the bottom plates 6, 7.8, but since each bottom plate 6, 7.8 itself is oriented upward with respect to the bottom 5, the waves The contact area between W and each of the bottom plates 6, 7.8 becomes small, and the resistance caused by the waves W can be reduced. After this, when the speed is reduced, the bow 9 gradually lowers, and each bottom plate 6°7.8 is below the water surface. At this time, the air accumulated in the corner 15 is exhausted to the outside through the through hole 16, so that the air contained in the bottom 5 does not increase the resistance.

As described above, in the above embodiment, by arranging the first to third bottom plates 6, 7.8 which face upward toward the bow 9 side on the bottom 5 of the ship, a larger water pressure is generated and the plane is in a planing state. Waves W generated by the collision between the water surface and the bottom 5 when the ship's speed increases and the ship's bow 9 points upward.
The resistance of the engine can be reduced, and higher speeds can be achieved with lower fuel consumption.

Moreover, since the through holes 16 are formed in the current plate 14, the bottom 5
The air contained in the engine can be exhausted, and there is no harm caused by the air even at low speeds after high speeds.

5 and 6 show a second embodiment, in which the first embodiment
The same parts as in the embodiment are given the same reference numerals, and detailed explanation thereof will be omitted.

The entire hull has a substantially streamlined shape, and propellers 24 serving as an upper propulsion device are provided on both sides of the outer plate 1 via upper mounting arms 23. The propeller 24 is provided closer to the bow 9 than the center of gravity G of the hull, and is rotationally driven by an engine 25 built into the engine cover 25A. Further, screws 27 serving as a lower propulsion device are provided below both sides of the bottom 5 via lower mounting arms 26 . This screw 27 is provided closer to the bow 9 than the center of gravity G,
Engine 30 built in watertight engine case 3OA
It is rotationally driven by.

So, the engine 25.30 propeller 24
When the boat is propelled by the screw 27, the boat floats up as in the first embodiment, reducing water resistance and allowing the boat to proceed at high speed. At this time, the propeller 24, the screw 2
7 is provided closer to the bow 9 than the center of gravity G, it is possible to prevent the bow 9 from rising too high. That is, the propeller 24 and the screw 27 exert a propulsive force that pulls the hull rather than pushing it, so that the hull can be stably propelled.

As described above, the propeller 24 is provided on the outer panel 1 via the upper mounting arm 23, and the lower housing (=1 arm 2) is provided on the bottom 5.
By providing the screw 27 through the screw 6, the hull can be propelled with good stability.

FIGS. 7 to 10 show a third embodiment in which a plurality of ships are towed. Reference numeral 31 is a power boat, and a step 32 is provided with a propeller 33 and a rudder 34. A plurality of carrier vessels 35, 36 are connected in a line to this power vessel 31.

A plurality of bottom plates 40 are provided on the bottom 37 of the power boat 31 from the bow 38 side to the stern 39 side via rising walls 41. Similarly, the bottoms 42 of the first and second carriers 35, 36 are also provided via a plurality of bottom plates 43 or rising walls 44. The stern 39 of the power boat 31 and the bow 45 of the first carrier 35 are connected by a universal joint 46. The universal joint 46 is a receiving part 46 fixedly installed on the power boat 31.
A connecting portion 46B fixed to the first carrier 35 is loosely inserted into A, and both are connected by a shaft 46C.

In addition, the stern 39 side of the power boat 31 and the bow 45 side of the first carrier 35 are connected by an elastic side plate 47 having water resistance such as rubber or vinyl, and the lower end of the bow 45 side of the first carrier 35 is connected from step 32. A hollow portion 49 is formed between the stern 39 and the bow 45, through which water enters through the hole 47A. The elastic side plates 47 and the elastic bottom plate 48 are mounting plates made of steel or the like provided at the stern 39 and the bow 45, respectively.
It is installed through the Similarly the first and second
A cavity 49 is also provided between the carriers 35 and 36.

Next, the operation of the above structure will be explained.

A first carrier vessel 35 is connected to the power vessel 31 via a vertically movable and horizontally movable universal joint 46 via a cavity 49, and a second carrier vessel is connected to the first carrier vessel 35 via a universal joint 46. 36 are connected through a cavity 49, the power boat 31, the first and second carrier boats 35.36 are connected in a line, and when the power boat 31 is propelled, the first and second carrier boats 35.36
is towed. This flow of water removal flows through the bow 38 of the power boat 31.
The water flows uniformly from the water to the stern 53 of the second carrier ship 36, and can be propelled with water resistance smaller than the sum of the water resistances that propelled each power boat 31 and the carrier boat 35, 36 individually.

Further, holes 47 are provided between the power boat 31 and the first carrier boat 35 and between the first carrier boat 35 and the second carrier boat 36.
By forming the cavity 49 into which water flows in from A, there is no risk of the cavity 49 being filled with water to the same water level as the water level and damaging the elastic side plate 47 etc. due to water pressure.Water resistance at each connection part can be reduced.

Note that the present invention is not limited to the above embodiments,
For example, in the second embodiment, only one of the propeller 24 as the upper propulsion device or the screw 27 as the lower propulsion device may be provided, or a jet engine may be used as the propulsion device instead of the propeller or the screw. . Furthermore, as shown in FIG. 11, a screw 18, which is a rear propulsion device, is provided behind the center of gravity.
A screw 27 serving as a lower propulsion device may be provided closer to the bow 9 side. In this case, the screw 27 may be replaced with a propeller serving as an upper propulsion device. In addition, multiple provers are installed regardless of the rudder. Various modifications are possible, such as changing the propulsion direction by changing each output of a propulsion device such as a jet engine.

[Effects of the Invention] As described in detail above, the present invention has a plurality of diagonally installed bottom plates, thereby increasing the water pressure caused by the water surface. It is less susceptible to resistance, allowing for faster speeds and energy savings. Furthermore, by providing the propulsion device closer to the bow than the center of gravity of the hull, stability can be improved.

[Brief explanation of the drawing]

Figures 1 to 4 show the first embodiment, with Figure 1 being a partially cutaway perspective view, Figure 2 being a partially cutaway front view, and Figure 3 being a partially cutaway front view.
The figure is a bottom view, Figure 4 is a partially cutaway front view, Figures 5 and 6 show the second embodiment, Figure 5 is a partially cutaway front view, and Figure 6 is a side view. , Fig. 7 to Fig. 10 show the third embodiment, Fig. 7 is a front view, Fig. 8 is a plan view,
FIG. 9 is a front view of the main part, FIG. 10 is a plan view thereof, and FIG. 11 is a partially cutaway front view showing the fourth embodiment. 5... Bottom 6.7.8... Bottom plate 9... Bow 13... Step (stern) 24... Propeller (upper propulsion device) 27... Screw (lower propulsion device W) G ...center of gravity

Claims (2)

[Claims] (1) A ship characterized by having a plurality of bottom plates with the bow side facing upward from the bow side to the stern side. (2) The ship according to claim (1), wherein the propulsion device is provided closer to the bow than the center of gravity of the ship.