JP2002316694A - Ship propelling with using friction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To greatly reduce friction resistance and wave making resistance for a usual ship which navigates on a water surface by a propulsion force of a propeller attached on a tail of the ship or jet of pumped-up water while supported by buoyancy from displacement of a ship body and needs energy to overcome the friction and wave making resistances. SOLUTION: A ship navigating on water has driving shafts installed at a front and a rear bottom part of a ship body. A rotating belt is mounted on the driving shafts through pulleys. The ship propels with using a friction force generated between the rotating belt and water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a propulsion system for a ship navigating on the water surface, and more particularly to a propulsion ship in which a frictional force generated between a hull and water is used as a propulsion force of the ship. .

[0002]

2. Description of the Related Art In general, a ship sails on the water surface by propagating a propeller attached to a stern or jetting jetted water while supporting its weight by buoyancy generated by drainage of a hull. In this case, the resistance received by the hull is roughly classified into frictional resistance at the contact surface between the hull surface and water, and wave resistance generated by pushing water at the bow or pulling water at the stern. The propulsion described above must be large enough to overcome the sum of the drags, and will account for most of the fuel consumption factors in ship operation.

[0003]

SUMMARY OF THE INVENTION The present invention provides a propulsion system which has never been employed as a conventional method for propulsion of a ship, and utilizes a frictional force generated at a contact surface between the surface of the hull and water. It is an object of the present invention to obtain a propulsive force and to extremely reduce the frictional resistance and the wave-making resistance applied to the ordinary ship described above.

[0004]

In order to solve the above-mentioned problems, a first aspect of the present invention relates to a ship navigating on the water surface, wherein a drive shaft is provided before and after the bottom of the hull, and a pulley is attached to the drive shaft. A rotating belt is mounted via the rotating belt, and the ship is propelled by utilizing a frictional force generated between the rotating belt and water.

According to the second and third aspects of the present invention, the friction surface generating the frictional force is formed as a part of the rotating belt separated from the hull by the compressed air, and the water pressure applied to the belt is transmitted to the hull by the air pressure of the compressed air. By doing so, the peripheral movement resistance of the belt is reduced. Further, by providing a partition wall between the hull at the center of the hull bottom and the rotating belt, a restoring force is provided when the hull is tilted, and turning right and left is facilitated.

A fourth aspect of the present invention is to provide an amphibious vehicle that allows a ship to land by using a rotating wheel having a buoyancy as a friction surface that generates a frictional force. It was done. The rotating wheel is a wheel into which a large amount of air is injected, such as a balloon tire.

[0007]

Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic explanatory side view showing an embodiment of a friction utilization propulsion ship according to the present invention. In the figure, reference numeral 3 denotes a hull, and a drive shaft 4 is provided around the bottom of the hull 3, and the rotating belt 1 is mounted on the drive shaft 4 via a pulley 2. 5 is a water surface. As shown in FIG.
When the is rotated, the rotating belt 1 is rotated via the pulley 2 as shown by an arrow in FIG. Thus, the hull 3 is propelled by utilizing the frictional force between the rotating belt 1 and water.

Next, the fact that the frictional resistance and wave-making resistance applied to the hull 3 are extremely reduced will be described. First, regarding the frictional resistance, assuming that the moving speed of the rotating belt 1 as a friction surface with water is Vf and the boat speed is Vs, in an initial starting state, the rotating belt 1 slides on the water surface, so that Vf> Vs.
A frictional force is generated for the difference Vc (= Vf−Vs),
The hull moves and accelerates. However, as time elapses, the difference Vc decreases, and eventually approaches zero. This means that the boat speed Vs is relatively lower than the moving speed Vf of the rotating belt 1, so that the friction propulsive force applied to the hull 3 is extremely reduced. No frictional resistance occurs.

Next, regarding the wave-making resistance, a normal ship is driven forward by a screw propulsion while draining surrounding water and supported by buoyancy generated thereby. In this case, a wave is generated due to an increase in the pressure of the water near the bow caused when the water is swept by the bow. At the stern, a wave is generated due to a pressure drop caused by the hull pulling water on the water surface. The hull receives the reaction force accompanying the generation of these waves, and a resistance called wave resistance is applied to the hull 3. However, in the present invention, as shown in FIG. 1, the water is drawn into the vicinity of the bow by the rotation of the pulley 2 attached to the bow. The pressure rise of the water at is extremely small. Further, also at the stern, the pressure drop of water near the stern becomes extremely small due to the rotation of the pulley 2. As described above, the generation of waves at the bow and tail is extremely suppressed, and the wave-making resistance of the hull 3 is extremely small.

FIG. 2 is a schematic explanatory side view showing an embodiment of an amphibious vehicle as an application example of the friction propulsion ship according to the present invention. FIG. 2A is a side view thereof, and FIG. 2B is a front view thereof. In the figure, reference numeral 6 denotes a rotating wheel. The rotating wheel 6 is made of a material having a very large buoyancy, such as a balloon tire into which a large amount of air is injected.
And a small fin-like projection 7
By forming a large number of these, a large friction surface with water is formed. Since the rotating wheels 6 are provided on the front, rear, left and right of the hull 3 as in the present embodiment, the hull 3 can be landed, and the vehicle is an amphibious vehicle. Although the principle of propulsion is the same as that of FIG. 1, in the case of the present embodiment, instead of the rotating belt 1, the friction surface is formed by a rotating wheel 6 having small fin-like projections 7 that are not affected when traveling on land. The frictional force with the water can be accurately converted to the propulsion of the ship, and the landing of the ship is made possible, thus providing an amphibious vehicle.

FIG. 3 is a schematic explanatory side view showing another embodiment of the frictional propulsion ship according to the present invention. FIG. 3A is a side view thereof, and FIG. 3B is a sectional view thereof. 2, the same reference numerals as those in FIG. 1 denote the same components, and a detailed description thereof will be omitted. Reference numeral 8 denotes an air supply duct for forming a gap. The air supply duct 8 is provided at the bottom of the hull 3, and a plurality of air ejection nozzles 9 are provided to face the rotating belt 1. 1
0 air pump, the air pump 10
Is supplied to the air supply duct 8 with the air pressure being made uniform in the pressure tank 11. A gap is formed between the rotating belt 1 as a friction surface and the hull 3 by the high-pressure air jetted from the jet nozzle 9. By providing the gap in this way, the hydraulic pressure applied to the rotating belt 1 is reduced to a high level by a high air pressure, so that the rotational resistance of the rotating belt 1 to the hull 3 is extremely reduced.

Reference numeral 12 denotes a roller, which supports the rotary belt 1 and is mounted on the bottom of the hull 3 and is rotatable. Reference numeral 13 denotes a partition wall, which is fixed substantially at the center of the bottom of the hull 3 and divides the gap formed by the high-pressure air into left and right air chambers. By configuring the partition wall 13, the air pressure in the left and right gaps can be adjusted. Thus, when the hull 3 is tilted to the left or right, the pressure of the air chamber on the opposite side of the tilt is reduced, and buoyancy is given to the tilted side, so that the hull 3 can be easily restored. Further, when turning left and right, if the pressure in the air chamber on the turning direction side is reduced, the resistance between the rotating belt 1 and the hull 3 increases, and the turning radius can be significantly reduced.

In a friction propulsion ship, the buoyancy associated with the drainage of the hull 3 is ultimately transmitted from the rotating belt 1 to the hull 3 via the drive shaft 4. In this case, the mechanical frictional force associated with the rotation of the drive shaft 4 is proportional to the buoyancy of the hull 3, and the rotational power of the drive shaft 4 accounts for most of the fuel consumption in the operation of the present invention. In this embodiment, by injecting high-pressure air 8 between the rotating belt 1 and the hull 3,
By transmitting the water pressure directly to the hull 3 by the air pressure of the high-pressure air 8, the mechanical frictional force accompanying the rotation of the drive shaft 4 can be extremely reduced.

The rotary belt 1 in the above embodiment is used.
Has been described, but the present invention is not limited to this, and it goes without saying that a plurality of the rotating belts 1 may be installed on the bottom of the ship. When a plurality of rotating belts 1 are installed in this way, turning one of them is stopped or each of them is reversely rotated, so that turning becomes easier. Further, as is common to all the above-mentioned embodiments, if the rotating belt 1 is rotated in reverse during navigation, a braking force is obtained and navigation is safe.

[0015]

The present invention is configured as described above,
In a ship navigating on the water surface, a drive shaft is provided before and after the bottom of the hull, a rotating belt is mounted on the drive shaft via a pulley, and a frictional force generated between the rotating belt and water is used. The hull's propulsive force, thereby significantly reducing the generation of waves at the bow and stern, and significantly reducing the wave-making resistance experienced by the hull, enabling highly efficient propulsion. . Also, as a result, friction resistance and wave resistance can be significantly reduced, so that speed can be increased,
The fuel consumption can be significantly reduced. Further, by controlling the rotation direction of the rotating belt, the stop / turn can be easily performed.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory side view showing an embodiment of a friction propulsion ship according to the present invention.

FIG. 2 is a schematic explanatory side view showing an embodiment of an amphibious vehicle as an application example of the frictional propulsion ship according to the present invention. (A)
Is a side view thereof, and (b) is a front view thereof.

FIG. 3 is a schematic explanatory side view showing another embodiment of the friction utilization propulsion ship according to the present invention. (A) is a side view thereof,
(B) is a cross-sectional view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotating belt 2 Pulley 3 Hull 4 Drive shaft 6 Rotating wheel 8 Air supply duct 9 Nozzle 13 Partition wall

Claims (4)

[Claims] 1. A ship navigating on the water surface, wherein a drive shaft is provided at the front and rear of the hull, and a rotary belt is mounted on the drive shaft via a pulley, and the drive shaft is formed between the rotary belt and water. A friction-based propulsion ship characterized in that the hull is propelled using frictional force. 2. A rotating belt for generating frictional force is isolated from a hull by high-pressure air.
The friction propulsion ship described. 3. A friction propulsion ship according to claim 1, wherein a partition wall is provided between the hull at the center of the hull bottom and the rotating belt. 4. The propulsion ship utilizing friction according to claim 1, wherein the friction surface generating the frictional force is a rotating wheel having buoyancy.