JPH1111387A - Device for preventing rolling of hull - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the rolling of a hull by providing a hydrofoil comprising a separation foil which is provided in the center of the hydrofoil and separates the section of the hydrofoil in the ship breadth direction, and an auxiliary foil which is provided on a rear end part of the separated hydrofoil and independently driven. SOLUTION: When the clockwise rolling R1 of a hull 1 is detected by a list sensor and an accelerometer, a port side driving mechanism 10 raises a port side auxiliary foil 8 by the signal from a control part 12, a starboard side driving mechanism 11 lowers a starboard side auxiliary foil 9, the upward lift F1 is formed on the port side and the downward lift F2 is formed on the port side, the suppressing moment against the forced moment caused by the wave is formed to cancel the moment, and to prevent the rolling of the hull. The reverse effect is achieved for the counterclockwise rolling. Because a separation foil 7 divides the right and left flow field of the separation foil 7 while the resistance during the navigation is suppressed small, the lift in the different direction can be generated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hull roll prevention apparatus.

[0002]

2. Description of the Related Art As one of the techniques for preventing the ship from rolling, there is a method of independently controlling the left and right auxiliary wings of both end supporting wings (prior art 1).

[0003] Japanese Patent Application Laid-Open No. 6-263082 entitled "Twin-hull hydrofoil ship" has been disclosed (prior art 2). The `` twin-hull hydrofoil ship '' disclosed in this publication has a fully submerged hydrofoil before and after the hull, and the center of each hydrofoil is supported by a column suspended from the bottom on the hull center line. Support,
An independently driven auxiliary wing is attached to the trailing edge of each hydrofoil.

In order to prevent the roll, an auxiliary wing provided on the port side of the hydrofoil is driven so as to generate a restraining moment in the direction opposite to the roll moment.

[0005]

However, in the above-mentioned prior art 1, it is difficult to obtain a sufficient lift from the respective auxiliary wings due to the crossflow of the left and right flow fields on the wing surface.

In the prior art 2, since the center of the hydrofoil is supported by the column, the function of the auxiliary wing can be sufficiently exhibited, but the resistance acting on the column during sailing increases. Occurs.

[0007] It is an object of the present invention to provide a more effective roll prevention device in the above-described double-ended hydrofoil.

[0008]

SUMMARY OF THE INVENTION The foregoing object is achieved by providing a hydrofoil provided in the width direction of a hull, a strut extending downward from the hull to support both ends of the hydrofoil, and a center of the hydrofoil. This is solved by a ship hull anti-rolling device comprising: a separating wing provided in a section and separating a hydrofoil surface in a ship width direction; and an auxiliary wing provided at a rear end of the separated hydrofoil and independently driven. You.

According to the above means, the rolling moment is generated by independently driving the auxiliary wings while the hull is moving. At this time, the water flow is rectified to the left and right by the separating blades, and the pressure distribution on the left and right hydrofoil surfaces forms a preferable state for generating a rolling moment. In addition, since the effect of lift due to the action of the auxiliary wing can be sufficiently generated by the rectifying action, a moment in the opposite direction to the forced moment due to waves is generated, and the rolling of the hull is reduced by canceling the forced moment. Can be prevented.

[0010] Further, since the size of the separation wing can be reduced, the resistance during sailing can be suppressed.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of an anti-rolling device for a hull according to the present invention, wherein 1 is a hull, and 1 'is a hull bottom.

Reference numerals 2 and 3 denote struts extending downward from the bottom 1a of the hull 1 as a pair. Both ends of the hydrofoil 4 are attached to the ends of the struts 2 and 3 via attachment portions 5 and 6 at predetermined positions. Installed at the corner.

The hydrofoil 4 is separated into a port hydrofoil 4a and a starboard hydrofoil 4b by a separating blade 7 at the center of the wing surface.

Further, the separated port hydrofoil 4a and starboard hydrofoil 4b are provided with a port auxiliary wing 8 and a starboard auxiliary wing 9 at the trailing edge, respectively, and are mounted so as to be independently driven. I have.

A port driving mechanism 10 drives the port auxiliary wing 8. A starboard drive mechanism 11 drives the starboard auxiliary wing 9. A control unit 12 controls the port drive mechanism 10 and the starboard drive mechanism 11.

FIG. 2 is a perspective view of a hull roll prevention device according to the present invention applied to a catamaran.

1a is a port body, and 1b is a starboard body.
The upper parts of the struts 2 and 3 are the port body 1a and the starboard body 1b.
And supports both ends of the hydrofoil 4 under struts 2 and 3. A separating wing 7 is provided at the center of the hydrofoil 4 to form a port hydrofoil 4a and a starboard hydrofoil 4b, and a port auxiliary wing 8 and a starboard auxiliary wing 9 are attached to the rear edge thereof.

According to the present invention, even when the hull 1 is wide, even a monohull can be installed with a similar structure.

FIG. 3 is a front view illustrating the operation of the anti-rolling device for a hull according to the present invention.

In the present invention, a clockwise roll R ₁ of the hull 1 is obtained by a tilt sensor and an accelerometer (not shown).
Is detected, the port drive mechanism 10 raises the port auxiliary wing 8 and the starboard drive mechanism 11 lowers the starboard auxiliary wing 9 by a signal from the control unit 12 to generate an upward lift F ₁ on the starboard side.
Further, on the port side to form a downward lift F _2, to form a restraining moment for forcing moment by waves, performs cancellation of the moment, to prevent lateral sway of the hull. In addition, the counterclockwise roll has the opposite effect to that described above.

The separation wing 7 can divide the flow fields on the left and right sides of the separation wing 7 while keeping the resistance at the time of traveling small, so that it is possible to generate lift in different directions as described above.

Since the struts 2 and 3 also extend downward, they function as dampers for the rotational moment. Furthermore, the attachment parts 5 and 6 can also function as a damper by forming the attachment parts 5 and 6 into a fin shape in the vertical direction.

FIG. 4 is a front view of an embodiment in which the hydrofoil according to the present invention is mounted on a catamaran. The struts 2, 3 are formed in the catamaran hulls 1a, 1b. In this structure, the hydrofoil 4 is supported at an angle that opens downward.
With this structure, the wing area of the hydrofoil 4 can be set large.

FIG. 5 is a front view of an embodiment in which the hydrofoil according to the present invention is mounted on a catamaran, and the struts 2 and 3 are submerged at an angle in which the struts 2 and 3 are wide open upward. The structure supports the wing 4. With this structure, the strength of the structural system including the strut can be increased.

FIG. 6 is a plan view in which struts 2 and 3 supporting both ends of the hydrofoil 4 according to the present invention are cut along a water surface line, and shows an embodiment in which the struts 2 and 3 are arranged in the longitudinal direction of the hull. It is in a state of being arranged parallel to the hull center line.

FIG. 7 is a plan view in which struts 2 and 3 supporting both ends of the hydrofoil 4 according to the present invention are cut along a water surface, and the struts 2 and 3 are closed forward with respect to the hull center line. It is a structure arranged in. With this structure, the wing area of the port auxiliary wing 8 and the starboard auxiliary wing 9 at the trailing edge of the hydrofoil 4 can be increased.

FIG. 8 is a plan view in which struts 2 and 3 supporting both ends of the hydrofoil 4 according to the present invention are cut along a water line, and the struts 2 and 3 open forward with respect to the center line of the hull. It is a structure arranged in. With this structure,
The resistance acting on the struts 2, 3 can be reduced.

[0029]

As described above, the present invention makes it possible to enhance the lift generating effect of the auxiliary wing, which serves as a roll suppressing moment, while keeping the resistance increase small during sailing.
Rolling of the hull can be accurately prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view of a hull anti-rolling device according to the present invention.

FIG. 2 is a perspective view in which the anti-rolling device for a hull according to the present invention is applied to a catamaran.

FIG. 3 is a front view illustrating the operation of the hull roll prevention device according to the present invention.

FIG. 4 is a front view of the embodiment when the hydrofoil according to the present invention is mounted on a catamaran.

FIG. 5 is a front view of the embodiment when the hydrofoil according to the present invention is mounted on a catamaran.

FIG. 6 is a plan view of struts supporting both ends of a hydrofoil according to the present invention, taken along a water surface line.

FIG. 7 is a plan view of struts supporting both ends of a hydrofoil according to the present invention, cut along a water surface line.

FIG. 8 is a plan view of struts supporting both ends of a hydrofoil according to the present invention, taken along a water surface line.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hull 1 'Bottom 1a Port fuselage 1b Starboard fuselage 2 Strut 3 Strut 4 Hydrofoil 4a Port hydrofoil 4b Starboard hydrofoil 5 Mounting part 6 Mounting part 7 Separation wing 8 Port auxiliary wing 9 Starboard auxiliary wing 10 Port drive mechanism 11 Starboard drive Mechanism 12 control unit

Claims (1)

[Claims] 1. A hydrofoil provided in a width direction of a hull, a strut extending downward from the hull to support both ends of the hydrofoil, and a hydrofoil provided at a central portion of the hydrofoil, and An anti-rollover device for a hull, comprising: a separating wing separated in a width direction; and auxiliary wings provided at a rear end of the separated hydrofoil and independently driven.