JPS6175093A - Double shaft high speed boat associated with rolling reducer - Google Patents

Abstract

PURPOSE:To reduce rolling of hull without causing resistance of hull by employing fixed front half section of rudder in double shaft high speed boat then coupling the left/right coupling sections through horizontal wing while providing a flap to be controlled through hull rolling detecting means on the rear edge of horizontal wing. CONSTITUTION:Propellers 5R, 5L are provided to the left and right at the stern while rudders 9R, 9L are provided in the rear of each propeller. In such double shaft high speed boat, front half sections 8R, 8L of each rudder 9R, 9L are constructed as fixed sections to couple the left/right fixed sections through a horizontal wing 10. Then a flap 11 is provided at the rear edge of said wing 10 to function in the direction for reducing the rolling of hull on the basis of hull rolling detecting means. Consequently, sufficient reducing effect of rolling of hull can be achieved without increasing the hull resistance.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a two-shaft high-speed boat having propellers on both sides of the stern, and particularly to a two-shaft high-speed boat having a hull vibration reduction device.

[Conventional technology]

As shown in Figures 5 to 7, there are conventional two-Yuu type high-speed boats equipped with devices for reducing hull oscillations (particularly longitudinal oscillations).
The rear half of the hull B is constructed as a twin hull as indicated by the symbols IL and IR (however, the front half of the hull B is a Jil hull), and a vertical vibration reduction fin (
Anti-pitching fins) 3 are rotatably mounted as shown by arrow a.

In addition, the rotation control 8 for the anti-pitching fin 3!
Although not shown, a chestnut is provided.

In addition, in Figures 5 to 7, the symbols 4L and 4R indicate the left and right propeller pongee protruding diagonally downward from the bottom of the ship, SL.
, SR are the left and right propellers, 6L, 6R are the left and right propellers, a Bella 5L, 5R17) At the rear, these propellers SL, 5R
The rudders are arranged along the vertical direction on the outer side, and the reference numeral W indicates the water line surface.

[Problem that the invention seeks to solve]

However, the conventional 2
In the Sen-type high-speed boat, the anti-pitching fin 3 is arranged in the recess 2 between the twin hull parts IL and IR, so a sufficient flow velocity cannot be obtained as a flow velocity against the 7-inch pitching fin 3. In addition to the 7-inch pitching fins 3 having an insufficient effect of reducing longitudinal sway, the hull is partially twin-hulled, so there is a problem in that the hull resistance increases considerably and the propulsion performance is impaired.

The present invention aims to solve these problems, and provides a two-shaft high-speed boat with a hull sway reduction device that can obtain a sufficient hull sway reduction effect without causing an increase in hull resistance. The purpose is to

[Means for solving problems]

For this reason, the two-shaft high-speed boat with a hull motion 41 mitigation device of the present invention is equipped with propellers on the left and right sides of the stern, and has rudders behind each of these propellers. The front half is configured as a fixed part, and a horizontal wing is provided that connects the fixed parts of the rudder on the left and right sides, a flap is pivotally attached to the trailing edge of the horizontal wing, and a rotation control mechanism for the flap is provided. It is characterized by the provision of.

[For production]

In the above-mentioned two-Year type high-speed boat equipped with a hull vibration reduction device of the present invention, the fixed parts of the left and right rudders are connected with each other by a horizontal wing, so the strength of the rudder can be increased, and the thickness of the rudder can be increased. The increase in resistance due to the addition of horizontal wings and flaps is due to the rudder! Since it can be sufficiently offset by reducing the stiffness, it does not cause an increase in hull resistance, and since the flap is pivotally attached to the trailing edge of the horizontal wing, it can effectively reduce hull sway. I can do it.

〔Example〕

Below, the drawings show how to reduce the hull ei as an embodiment of the present invention! To explain the two-shaft type high-speed glue with & device, Figure 1 is a perspective view of the bottom of the ship from below, and Figure 2 is the same as Figure 1.
The arrow view, Figure 3 is a partial side view showing the stern part enlarged, and Figure 4 is a block diagram showing the 727 system W system. The same reference numerals indicate substantially similar parts.

As shown in Figure 1.2, this two-Yuzu type high-speed lever is
5L propellers on the left and right sides of the bottom of the stern at ''.

Along with being equipped with 5R, these propeller SL.

There is a rudder at the rear of 5R and on the outer side.

It has 7R.

By the way, each building is 7L? The front half of R is the fixed part 8L
, 8R, and the rear half is fixed f.
It is configured as rudder parts 9L and 9R that are pivotally attached to the rear edges of i8L and 8R, and these fixed parts 8L and 8R and rudder part 9L
, 9R are combined into one, and the cross-sectional shape is the fifth
It is formed to have the same cross-sectional shape as the conventional snakes 6L and 6R shown in the figure, for example, an airfoil-shaped cross-sectional shape.

Furthermore, the fixed portions 8L of the rudders 7L and 7R on the left and right sides.

A horizontal wing 10 is provided that connects the lower ends of the 8R, and a flap 11 functioning as an anti-pitching fin is pivotally attached to the trailing edge of the horizontal wing 10 almost flush with the horizontal wing 10. The cross-sectional shape of the wing 10 and the flap 11 combined into one is also formed to have an airfoil-shaped cross-sectional shape, for example.

The green part after flap 11 is propeller 5L.

It is set to be located slightly further forward than 5R.

As mentioned above, the fixed parts 8L at the left and right rudders 7L and 7R
, 8R by connecting 10t horizontal blades,
The strength of the rudders 7L and 7R can be increased, and the thickness of the rudders 7L and 7R can thereby be reduced, so the increase in resistance due to the installation of the horizontal blades 10 and 7 ruffs 11 is due to the increase in the resistance of the rudders 7L and 7R. This does not result in an increase in hull resistance as it can be sufficiently offset by reducing the thickness.

Furthermore, a rotation control mechanism M for the flap 11 is provided.

That is, #&3. +As shown in the figure, an actuator (for example, a hydraulic cylinder) for rotating the flap 11
12 is installed inside the ship, and these 7 cutuators 12
and the flaps 11 are each arranged in the fixed 88R (or 8L) of the rudder, for example. They are connected via a structure.

Furthermore, a ship movement detection means 14 is provided for detecting ship movement, particularly longitudinal movement.
For example, a device capable of detecting pitching angle, angular velocity, or angular acceleration, such as a hull tilt meter, a rate gauge, or a suitable differentiator, can be cited, and the output signal thereof is an electrical signal.

Then, the signal 1 from this means 14 and the controller 13
This controller 13, for example,
It is equipped with a suitable memory and an input/output ink 7ace, and outputs a control signal to the actuator 12 to reduce the motion of the ship based on the signal from the means 14 described above.

As mentioned above, the 7 cut unit 12 is connected to the feed roller 13.
When a control signal is received from the ship, the actuator 12 is actuated in response, and the flap 11 is rotated up and down as shown by the chain rule in Figure 3, which causes the bow to move up and down to reduce pitching. It will be done.

In addition, since the flap 11 is located immediately in front of the propellers SL and SR, the flow attracted and accelerated by the propellers 5L and 5R is transferred to the water blade 10 and the flap 11.
Since it hits the ground, it is easy to generate lift, which can be expected to have a sufficient effect of reducing vertical sway.

By the way, snake 7L? The rudder sections 9L and 9R of R are driven by a steering mechanism 15.

Moreover, since the flap rotation control mechanism shown in FIGS. 3 and 4 is merely an example, it goes without saying that various other examples are possible.

In addition, 7 U 7 B 11 is vertical! l! In addition to being used as a fin for reducing IJ rocking, it can also be used as a fin for reducing other hull vibrations (for example, rolling and yawing).

〔Effect of the invention〕

As described in detail above, the ship body motion reducing device 2 according to the present invention
According to the MJ-type high-speed boat, in a 2Jll-type high-speed boat that has propellers on the left and right sides of the stern and has rudders behind each of these propellers, the front half of each of the above-mentioned buildings is configured as a fixed part, and the above-mentioned on the left and right It has a simple structure in which a horizontal wing is provided that connects the fixed parts of the rudder, a flap is pivotally attached to the trailing edge of the horizontal wing, and a rotation control mechanism for the flap is provided. A sufficient effect of reducing ship motion can be obtained without causing an increase.

[Brief explanation of drawings]

Figures 1 to 4 show a two-shaft high-speed boat equipped with a hull vibration reduction device as an embodiment of the present invention. Figure 1 is a perspective view of the bottom of the boat seen from below, and Figure i2 is a Arrow view, 3rd
The figure is an enlarged partial side view of the stern section, Figure 4 is a block diagram showing the flap control system, and Figures 5 to 7 show a conventional twin-shaft high ffi boat with a hull vibration reduction device. Fig. 5 is a perspective view of the bottom of the ship from below, and Fig. 6 is a perspective view of the bottom of the ship.
The figure is a schematic view of the arrangement of the anti-pitching fins viewed from the direction of the arrow ■ in Fig. 5, and Fig. 7 is a vertical cross-sectional view schematically showing the arrangement and operation of the anti-pitching fins. . 4L, 4R...Propeller Tsumugi, SL, 5R...Propeller,
7 L, 7 R... Rudder, 8L, 8R... Fixed part of rudder, 9
L, 9R...Rudder section, 10...Horizontal wing, 11...Flap, 12...7 Cutuator, 13...Controller, 1
4. Hull vibration detection means, 15. Steering mechanism, B'.
・Hull, M...flap rotation control** structure. Sub-Agent Patent Attorney Yoshihiko Iinuma Figure 1 Figure 2 B. Figure 3 Figure 4

Claims (1)

[Claims] In a two-shaft high-speed boat having propellers on the left and right sides of the stern and rudders behind each of these propellers, the front half of each of the rudders is configured as a fixed part,
A horizontal wing is provided to connect the fixed parts of the rudder on the left and right sides, a flap is pivotally attached to the trailing edge of the horizontal wing, and a rotation control mechanism for the flap is provided. , a two-axle high-speed boat equipped with a hull vibration reduction device.