JPH0867290A - Ship with full submerged hydrofoil - Google Patents

Abstract

PURPOSE: To make a depth surely measurable of submerging a hydrofoil main unit even when a wave is generated in the surface of water. CONSTITUTION: In a monohull type ship body 10, a bow part hydrofoil 2 and a stern part hydrofoil 3 are provided in the ship body 10, to hold a hydrofoil main unit 4 of the bow part hydrofoil 2 by a strut 21, provided in a ship width direction central part, extended almost horizontally in both sidewards, and an ultrasonic sensor of measuring a distance from the surface of water is mounted in the vicinity of both side end parts of this hydrofoil main unit 4, to mount its upper end part in a ship body side plate 11 held in both side end parts by struts 22 extended in a just downward direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ship with a fully submerged hydrofoil having a monohull type (monohull type) hull applied to leisure boats, fishing boats, passenger ships and the like.

[0002]

2. Description of the Related Art Recently, various new hull forms have been developed for the purpose of speeding up the boat and improving riding comfort. However, the fully submerged hydrofoil ship is particularly excellent in riding comfort in waves. It is increasing rapidly. In this fully submersible hydrofoil, it is necessary to control the hydrofoil body with a flap so that it can maintain a certain depth, so the submerged depth of the hydrofoil body during navigation is always measured. There is a need. Conventionally, as a means for this, as shown in FIG.
A pair of left and right ultrasonic sensors 80 are installed on the bow of the ship, each ultrasonic sensor 80 emits ultrasonic waves to the water surface 90, and the reflected waves are received to measure the height of the hull 10 on the water surface. Therefore, the depth of the hydrofoil body 15 submerged in water by the strut 14 from the hull 10 is detected.

[0003]

In the method of installing the ultrasonic sensor 80 on the bow hull described above, it is inevitable that the distance to the water surface 90 becomes large. There is a problem that the sound waves from the sensors interfere with each other, and when the directivity angle is set to a small value, when there is a wave on the water surface 90, the reflected wave from the water surface 90 is deflected, so that the reflected wave cannot be received. Therefore, there is a problem that reliable measurement cannot be performed.

The present invention has been made in order to solve such a conventional problem, and is capable of reliably measuring the submersion depth of the hydrofoil body even if waves occur on the water surface. The purpose is to provide a winged vessel.

[0005]

According to the present invention, in a monohull type hull, fully submerged hydrofoils are provided at the bow and stern of the hull, and the hydrofoil at the bow is formed by a strut provided at the central portion in the width direction. The hydrofoil body is held and extends substantially horizontally on both sides, and ultrasonic sensors for measuring the distance from the water surface are attached near both side ends of the hydrofoil body.

It is preferable that the hydrofoil body of the above-mentioned hydrofoil of the bow portion is configured so that the upper end portion is attached to the side plate of the hull and is supported at both end portions by struts extending substantially directly downward.

[0007]

In the above structure, since the ultrasonic sensor is mounted on the hydrofoil body, it is arranged relatively close to the water surface and is mounted on both side ends of the hydrofoil body. In addition, since the central strut that acts as a partition exists between the left and right ultrasonic sensors, the ultrasonic sensors do not interfere with each other even if the directivity angle of the ultrasonic waves is set wide. Therefore, even if a wave is generated on the water surface, the measurement can be reliably performed.

Further, if both ends of the body of the hydrofoil at the bow are held by the struts, the vortex of the wing from the both ends of the body of the hydrofoil can be reduced, which adversely affects the hydrofoil at the stern. Can be prevented.

[0009]

1 and 2, a monohull type hull 1 is shown.
No. 0 stern bottom and stern bottoms are each provided with a fully submerged bow hydrofoil 2 and a stern hydrofoil 3. The bow hydrofoil 4 extends horizontally in the ship width direction, and is held by the central strut 21 at the ship width direction central portion and by the side struts 22 at both end portions. The center strut 21 has its upper end attached to the ship bottom 12, and the side strut 22 has its upper end attached to the ship side plate 11 and extends substantially downward. The central strut 21 and side strut 22 have flaps 23 and 2 at their rear ends, respectively.
4 are provided to generate a turning force in the left-right direction, and flaps 41 are provided at the rear end of the hydrofoil body 4 in a symmetrical arrangement in the ship width direction. The adjustment of the lift force is done independently on the left and right. Further, ultrasonic sensors 8 for measuring the distance from the water surface are attached to the front edge portions of the hydrofoil body 4 near both end portions.

The hydrofoil main body 5 of the stern hydrofoil 3 extends horizontally in the ship width direction, and is held by the central strut 31 at the center in the ship width direction and by the side struts 32 at both side ends. ing. An upper end of the central strut 31 is attached to the ship bottom 12, and an upper end of the side strut 32 is attached to the ship side plate 11.
It is attached to and extends almost directly below. Further, flaps 51 are provided at the rear end portion of the hydrofoil body 5 in a symmetrical arrangement, so that the lift force of the hydrofoil body 5 is adjusted independently on the left and right sides. The above-mentioned flaps are controlled by a control means (not shown) at the operator's seat. Also, the above-mentioned struts 21, 22,
31 and 32 and hydrofoil bodies 4 and 5 are formed in a so-called wing shape in the overall cross-sectional shape including the flaps provided on them.

As shown in FIG. 3, the central strut 31 of the hydrofoil main body 5 is formed with a projecting portion 6 protruding downward from the hydrofoil main body 5, and the central strut 31 from a propulsion unit (not shown) in the hull 10 is formed. A propeller shaft guided therethrough extends rearward from the protrusion 6 and a propeller 7 is arranged, and the protrusion 6 forms a fin having a shape that cancels out side force due to the rotation of the propeller 7, whereby It is designed to ensure straightness.

4 and 5 show another embodiment of the bow hydrofoil, in which a fully submerged hydrofoil body 42 extending horizontally in the ship width direction is held in the center by the lower end of the strut 26. The struts 26 are attached to the bottom of the hull 10 at the center in the width direction of the ship. A flap 27 is attached to a rear end edge of the strut 26, a flap 43 is attached to a rear end edge of the hydrofoil body 42, and both side ends of the hydrofoil body 42 are superposed with respect to the water surface 90. An ultrasonic sensor 8 is attached to detect the depth of the hydrofoil body 42 by emitting sound waves and receiving the reflected waves.

In the configuration of FIG. 1, when the hull 10 is driven by the drive of the propeller 7, the hull 10 floats above the water surface 90 by the lift of the hydrofoil bodies 4 and 5 due to the speed exceeding a certain level. Start sailing. Then, the depth of the hydrofoil body 4 is measured by the ultrasonic sensor 8 and the flaps 41 and 51 are controlled according to the measured values so that the hydrofoil bodies 4 and 5 travel at a constant depth. By controlling the flaps 23 and 24, the ladder 2
Along with 2, 24, the turning force is generated.

The ultrasonic sensor 8 is composed of hydrofoil bodies 4, 42.
Are mounted relatively close to the water surface 90 because they are attached to each other, and are placed apart from each other because they are attached to both end portions of the hydrofoil bodies 4 and 42. Further, since there is the central strut 21 or 26 that acts as a partition wall between the left and right ultrasonic sensors 8, they do not interfere with each other even if the directivity angle of the ultrasonic waves is set wide. Even if a wave is generated at 90, the measurement can be reliably performed.

When the hydrofoil body 15 is supported only by the central strut 14 as shown in FIG. 7, vortices are generated at both end portions of the hydrofoil body 15, and the vortex system 16 is formed. By extending in the stern direction and reaching the stern hydrofoil, not only is the lift force of the stern hydrofoil body reduced,
This makes the flow velocity distribution in the width direction of the stern hydrofoil body non-uniform, causing cavitation in part or causing vibration. When these phenomena occur, various adverse effects such as deterioration of durability of the stern hydrofoil or deterioration of riding comfort will be brought about. However, as shown in the embodiment of FIG. 1, when the struts 22 are coupled to the side ends of the hydrofoil body 41, it is possible to prevent the above-mentioned vortex from being generated, and thus It is possible to prevent adverse effects.

In each of the above embodiments, the strut 22,
The lower end portions of 32 and 26 respectively project below the hydrofoil body, but these projecting portions do not necessarily have to be provided.

[0017]

As described above, according to the present invention, since the ultrasonic sensor is attached to the hydrofoil body,
It will be placed relatively close to the surface of the water, and since it is attached to both end parts of the hydrofoil body, it will be placed apart from each other, and there will be a partition between the left and right ultrasonic sensors. Since there is a central strut that performs the action of, the ultrasonic waves do not interfere with each other even if the ultrasonic directivity angle is set to a wide range, and therefore it is possible to reliably perform measurement even when waves are generated on the water surface. .

Further, if both ends of the body of the hydrofoil at the bow are held by struts, generation of wingtip vortices can be reduced from the both ends of the body of the hydrofoil, whereby the hydrofoil at the stern part is reduced. It is possible to prevent adverse effects. Further, the propeller is attached to the lower end of the central strut of the stern hydrofoil, and the lower end is formed into a fin shape that cancels the side force due to the rotation of the propeller, whereby the straightness of the ship can be ensured.

[Brief description of drawings]

FIG. 1 is a perspective view of a bottom of a hull showing an embodiment of the present invention.

2 is a perspective view of the bow portion of FIG. 1. FIG.

3 is a partially enlarged perspective view of the stern hydrofoil of FIG.

FIG. 4 is a perspective view showing another example of a bow hydrofoil.

FIG. 5 is a front view of FIG. 4;

FIG. 6 is a front view of a bow portion for explaining a conventional depth detecting means.

FIG. 7 is a perspective view of a hydrofoil for explaining the problems of the conventional hydrofoil of the bow portion.

[Explanation of symbols]

 2 Bow hydrofoil 3 Stern hydrofoil 4,5 Hydrofoil body 6 Fins 7 Propeller 8 Ultrasonic sensor 10 Hull 11 Ship side plate 12 Ship bottom plate 21,22 Bow hydrofoil struts 31, 32 Stern hydrofoil struts 41,51 flaps

Claims (2)

[Claims] 1. A monohull-type hull is provided with fully submerged hydrofoils at the bow and stern of the hull, and the hydrofoils are held on both sides by struts provided at the central portion in the width direction of the bow. A fully submerged hydrofoil equipped with ultrasonic sensors for measuring the distance from the water surface, which are extended substantially horizontally toward both sides of the hydrofoil main body. 2. The hydrofoil main body of the hydrofoil of the bow portion is supported at both side ends by struts having an upper end attached to a side plate of a hull and extending substantially downward. A completely submerged ship with hydrofoil.