JPH023972Y2 - - Google Patents

Description

[Detailed description of the invention] <Technical field of the invention> The invention is an amphibious craft called a hovercraft.
In other words, it's about air-cussion boats.

<Background of the invention> Conventionally, this type of air-cussion boat has a
An air generation mechanism that generates thrust and buoyancy in the hull, and a skirt-shaped hollow air chamber that communicates with the air generation mechanism is disposed along the outer periphery of the bottom of the ship, and the air generation mechanism generates air from the air generation mechanism. Introducing a part into the hollow air chamber,
Air is ejected from the jet ports arranged on the inner side of the hollow chamber and the jet holes arranged on the bottom surface, and a buoyant pressure air pool is created under the bottom of the ship surrounded by the hollow chamber, thereby causing air levitation, Promote.

However, since the jet ports arranged in the hollow air chamber are simply holes drilled in the upper part of both sides of the chamber near the bottom of the ship, there is no problem when traveling in a straight line, but when the ship turns left, In the event of a sideslip, as shown in Figure 3, seawater waves are generated in the buoyancy pressure air chamber 4 due to the rotation, and at this time, a considerable amount of water enters the hollow chamber 3 from the spout 37, and if it is on land, it will cause a rock formation. , sand intrudes. If water or the like enters the hollow air chamber in this way, it becomes difficult to float completely, and especially when driving on water, the hollow air chamber 3 is located underwater due to the weight of the water that has entered, increasing frictional resistance. The vehicle speeds down or becomes impossible to drive. Furthermore, when traveling on land, contact with the ground causes friction or damage.

<Purpose of the invention> The present invention provides a novel floating air blowing device that has an extremely simple configuration and can completely prevent water and sand from entering the hollow air chamber during turning, thereby realizing stable running. The purpose is to

<Configuration and effects of the invention> In order to achieve the above object, in the present invention, the base end of a flexible nozzle is connected to each jet port of the skirt-like hollow air chamber, and the tip jet port is connected to the bottom of the ship. They are placed close and diagonally opposite each other. According to the above configuration, when seawater waves are generated in the flotation pressure air chamber due to turning, the high waves do not reach the nozzle injection port, thus preventing water and sand from entering the hollow air chamber. Completely preventable.
Therefore, the hull always floats in the air and has the effect of realizing stable running whether traveling straight or turning.

<Description of Embodiments> FIG. 1 shows an overall side view of an air-cushion watercraft, in which a hull 1 includes an air generation mechanism 2 at the stern 11, and a skirt-shaped hollow air that goes around the outer periphery of the bottom 12. Chamber 3 is installed.

The air generation mechanism 2 has a propeller 22 disposed in a cylindrical duct 21 installed in the hull 1, and a rotating shaft of the propeller 22 is connected to a rotational drive device (not shown) directly or through a transmission means. Become,
The rotation of the propeller 22 generates a high-speed air flow within the duct 21. In the cylindrical duct 21,
An air inlet 23 is provided on the downstream side of the propeller 22 by occupying a part of the duct 21, and the air inlet 23 is connected to the hollow air chamber 3 through a passage 24.
is connected to.

The hollow air chamber 3 has a cylindrical member 31 made of a flexible sheet material whose surface has been treated with air resistance using rubber or synthetic resin material and arranged in a skirt shape along the outer periphery of the ship's bottom 12. Then, the cylinder material 3
1 is a sloped portion 3 adapted to the slope of the outer peripheral portion 13 of the bottom of the ship;
2 and a horizontal bottom 34 at the lower end of the enclosure 33;
It has a cylindrical shape that is continuous with the upper end of the inclined part 32 via a side wall part 35, and the inclined part 32 is integrally attached to the outer peripheral part 13 of the bottom of the ship. The bottom part 34 of the hollow air chamber 3 is provided with air jet holes 36 at appropriate intervals in the circumferential direction, and the surrounding part 3
3, air jet ports 37 are provided at equal intervals in the circumferential direction, and each jet port constitutes an air jet device according to the present invention. That is, in the present invention, the base end of a flexible nozzle 38 that forms a V shape when air passes through is connected to each of the jet ports 37, and the tip jet ports 39 are arranged close to the bottom 12 and diagonally opposite each other. The nozzle is made by cutting a flexible material into a certain shape and sewing it into a V-shaped tube. The number, spacing, and diameter of the nozzles 38 installed, and the position, spacing, number, and diameter of the air jet holes 36 in the bottom 34 are set based on the weight of the hull 1, air pressure, posture during traveling, etc. .

Therefore, when the air generation mechanism 2 operates, a part of the air flow generated in the duct 21 flows through the inlet 23.
The remaining air flow flows into the hollow air chamber 3 through the passage 24, and the rest of the air flow is ejected rearward from the duct 21, and the ejection reaction force is applied to the hull 1 as a thrust force. When the hollow air chamber 3 is filled with air and the pressure rises, the air pressure is regulated within the chamber 3 and sent from each flexible nozzle 38 to the pressure air chamber 4 below the ship's bottom 12 surrounded by the chamber 3.
gushes out. The pressure inside the chamber 3 and the pressure air chamber 4 gradually increases, the hull 1 rises, and the first
As shown in the figure, after the chamber 3 is fully inflated with air, the air further flowing into the chamber 3 is ejected downward from the ejection hole 36 in the chamber bottom 34, and the pressure in the air chamber 5 due to this ejection is reduced, causing the hull 1 lowers, the pressure inside the air chamber 4 rises again due to the air jet from the air chamber 3, and the hull 1 rises.
is floated by air and propelled by the ejection reaction force from the duct 21. Due to turning movement,
High waves occur in the air chamber 4, but the flexible nozzle 38
Since the injection port 39 opens near the bottom 12 of the ship, high waves do not reach it, and therefore there is no intrusion of water when traveling on water or sand when traveling on land, which has the effect of simplifying the configuration and achieving the intended purpose. has.

[Brief explanation of the drawing]

Figure 1 is the overall side view, Figure 2 is Figure 1 A-A
FIG. 3 is a schematic cross-sectional view along the line, and FIG. 3 is a schematic cross-sectional view for explanation. DESCRIPTION OF SYMBOLS 1...Bottom, 12...Bottom, 2...Air generation mechanism, 3...Hollow air chamber, 37...Ejection port, 38...Nozzle, 39...Ejection port, 4...
Pressure air chamber.

Claims (1)

[Scope of utility model registration request] An air generation mechanism 2 that generates thrust and buoyancy in the hull 1, and a plurality of air generators connected to the air generation mechanism 2 and arranged in a skirt shape along the outer periphery of the bottom of the ship, and arranged near the bottom 12 at equal intervals. Spout 37
In the air traction boat, which is equipped with a hollow air chamber 3 having a hollow air chamber 3, and a pressure air chamber 4 for flotation is formed under the bottom surrounded by the chamber 3, each air outlet 37 has a A floating air jetting device for an aircraft, characterized in that flexible nozzles 38 are connected at their base ends, and their tip jetting ports 39 are located close to and diagonally opposed to the ship's bottom 12.