JPS61278486A - Rectilinear stabilizer for high-speed type hull - Google Patents

Abstract

PURPOSE:To prevent a ship from rocking in all directions as well as to improve its rectilinear stability, by forming a concave bottom surface toward a ship's side from a center keel, while installing a stabilizing blade, making an angle of elevation variable at will, in a bottom stern part. CONSTITUTION:Concave bottom surfaces 8L and 8R are formed toward both ship's sides 4L and 4R from a center keel 6, while in the bottom stern part, there are provided with stabilizing blades 12L and 12R which makes an angle of elevation variable at will by means of an actuating device 18 on the basis of a signal out of a hull attitude detecting device 20. With this constitution, rolling, pitching and swaying at sailing are prevented from occurring so that rectilinear stability is improvable. In this connection, these stabilizing blades are possible to be installed in not only the bottom stern part but also in a lower part of the ship's side as 30L and 30R included.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a straight-line stabilizing device for a high-speed ship, and in particular, it prevents rolling and pitching during navigation of the ship, improves straight-line stability, and improves the steering function. This invention relates to a straight-line stabilizing device for high-speed ships.

[Prior Art] A ship's hull has stability that maintains the ship's upright position due to the relationship between buoyancy and gravity. In other words, the center of gravity of the entire ship is located higher than the center of buoyancy, and when the ship tilts, the volume of water displaced by the ship increases on the tilted side and decreases on the opposite side. As a result, the center of buoyancy moves to the side where the volume has increased, thereby acting to return the hull to an upright position.

[Problems to be Solved by the Invention] By the way, conventional high-speed hulls are mainly of a streamlined wave-riding type, and rolling and pitching occur in the hull due to the influence of waves. This is disadvantageous in that stability due to the relationship between buoyancy and gravity does not work effectively, deteriorating the straight-line stability of the hull and reducing safety.

Furthermore, some wave-riding type hulls are equipped with lift-generating wings to increase buoyancy. However, due to the tensile and compressive forces that act on the hull, such as bending when riding a wave (horaking) and bending when located in the trough of a wave (sagging), the longitudinal strength of the hull is increased by design. There is a disadvantage that it is necessary to do so, which increases the cost and is economically disadvantageous.

[Object of the Invention] Therefore, in order to eliminate the above-mentioned disadvantages, an object of the present invention is to provide a straight-travel stabilizing wing on the hull, and to provide a control means for controlling at least the angle of attack of the straight-travel stabilizing wing, thereby improving the stability during navigation. To provide a straight line stabilizing device for a high-speed ship that can prevent rolling and pitching, improve straight line stability, increase safety, and also have a steering function.

[Means for Solving the Problems] In order to achieve this object, the present invention provides an arcuate cross-section recessed toward the hull between the lower ends of the left and right side plates of the bottom of the hull to the keel, and The present invention is characterized in that a straight-travel stabilizing wing is provided, and a control means is provided for controlling at least the angle of attack of the straight-travel stabilizing wing to be changed in accordance with the attitude of the ship body.

[Function] With the configuration as described above, when the ship is sailing, at least the angle of attack of the straight-line stabilizing wings is controlled by the control means, increasing the stability and straight-line stabilizing force of the ship, preventing rolling and pitching, and maintaining straight-line stability. Improve safety and maximize safety. It is also possible to change the direction of movement of the ship by controlling the straight-line stabilizing wings.

[Examples] Examples of the present invention will be described in detail below based on the drawings.

1 to 5 show embodiments of this invention. 1st
In Figures 1 to 4, 2 is a high-speed hull, 2a is a bow, and 2b is a stern. The hull 2 includes, for example, a side plate 4 that is slightly expanded in the upward direction, and a circular arc-shaped cross section that is recessed toward the hull and is provided between the lower ends of the left and right side plates 4L and 4R to a linear keel portion 6. It consists of bottom plates 8L and 8R.

At this time, the side plate 4 is attached to the hull 2 in the longitudinal direction.
The bottom plates 8L and 8R are formed into a flat or curved surface along the planar shape of the base plates 8L and 8R, and the curvatures in the width direction of the bottom plates 8L and 8R are the same.

As shown in FIGS. 1 to 4, the keel portion 6 of the hull 2 includes:
A straight-travel stabilizing wing 10 is provided, and at least the angle of attack of the straight-travel stabilizing wing 10 is configured to be variable. That is, as shown in FIG. 5, two wing-like plate bodies 12L that match the curvature of the bottom plate 8,
12R to one end 16 of the support shaft 16 via the universal joint 14.
The plate-shaped body 12 is pivotally connected to
It is provided so as to be rotatable around the longitudinal direction of L and 12R.

Furthermore, when installing the straight-travel stabilizing wing 10 on the keel portion 6 of the hull 2, the longitudinal direction of the keel portion 6 and the longitudinal direction of the straight-travel stabilizing wing 10 are arranged to be perpendicular to each other, and the straight-travel stabilizing wing 10 is Provided on the stern 2b side. Further, as shown in FIG. 3, when the straight stabilizing wing 10 is not in use, it is configured to be housed in contact with the bottom plate 8 of the hull 2.

A control unit 18 serving as a control means is provided in the hull 2, and this control unit 18 inputs signals from a detection unit 20 that detects the posture of the hull 2, such as a horizontal state, and other input units (not shown), and controls the straight forward movement. At least the angle of attack of the stabilizing wing 10 is controlled (configured). Reference numeral 22 is a deck, 24 is a rear plate, and A is an arrow indicating the direction of movement of the hull 2.

Next, the effect will be explained.

When the hull 2 is sailing, the straight stabilizing wing lO, which is in the retracted state as shown by the solid line in FIG. 3, is rotated to a substantially horizontal state as shown by the dashed line. When rolling or pitching occurs due to the influence of waves, the detection section 20 detects an abnormal state of the attitude of the hull 2 and outputs an abnormal state signal to the control section 20. As shown in FIG.
is rotated to control the angle of attack of one or both of the plate-like bodies 12L and 12R of the straight-travel stabilizing blade IO.

As a result, the straight-line stabilizing wing exhibits a resistance function, effectively preventing rolling and pitching during navigation, improving straight-line stability and increasing safety.

In addition, by controlling the angle of attack of only one of the plate-like bodies forming the straight-line stabilizing blade, the direction of movement of the ship can be changed, and it also has a function of steering the ship.

Furthermore, by changing the horizontal state of the straight stabilizing blades and the angle of attack due to the rotation of the plate body, the wave riding state of the hull can be reduced as much as possible, and the bending force caused by honking and sagging can be reduced as much as possible. It is also possible to reduce the longitudinal strength of the hull in design.

Furthermore, by curving the bottom plate of the hull concavely in the direction of the hull, it is possible to improve straight-line stability and increase the strength of the bottom surface of the hull, which is advantageous in practice.

Note that the present invention is not limited to the above-described embodiments, and various modifications can be made.

For example, in the embodiment of the present invention, the linear stabilizing wing 10 is provided on the keel part 6 at the rear of the hull 2, but as shown by the two-dot chain line in FIG. Alternatively, it is also possible to provide straight-line stabilizing wings at other locations.

In addition, in the embodiment of the present invention, the straight-line stabilizing blade is constructed of two wing-like plate bodies, but the straight-line stabilizing blade can be constructed of plate bodies of various shapes such as triangular and quadrangular. The straight-travel stabilizing blade can also be constructed by one or three or more plate-like bodies.

[Effects of the Invention] As explained in detail above, the present invention provides the following effects.

(1) Since straight-line stabilizing wings are provided on the hull, rolling, pitching, and swaying can be prevented during navigation, improving straight-line stability and increasing safety.

(2) Since at least the angle of attack of the straight-travel stabilizing blade is controlled by the control means, reliable control operations can be performed, and
It can also easily change the direction of travel of the ship and may have a steering function.

(3) By preventing the wave-riding condition acting on the hull as much as possible and reducing the bending force during the wave-riding condition, the longitudinal strength of the hull can be reduced in terms of design, and the structure can be simplified and manufactured. It is easy to do so, the cost can be kept low, and it is economically advantageous.

[Brief explanation of the drawing]

Figures 1 to 5 show examples of the present invention; Figure 1 is a right side view of the hull, Figure 2 is a bottom view of the hull, Figure 3 is a front view of the hull, and Figure 4 is a straight-line stabilizing wing. The right side view and FIG. 5 are schematic perspective views of the straight-travel stabilizing blade. In the figure, 2 is a hull, 4 is a side plate, 6 is a keel, 8 is a bottom plate, 10 is a straight-travel stabilizing wing, and 18 is a control section.

Claims (1)

[Claims] A cross-section is formed in the shape of an arc concave toward the hull between the lower ends of the left and right side plates of the bottom of the hull to the keel, and the hull is provided with straight-line stabilizing wings, and the straight-line stabilizing wings are adjusted according to the attitude of the hull. 1. A straight-line stabilizing device for a high-speed ship, comprising a control means for controlling at least a change in the angle of attack.