JPH0640395A - Rudder of ship - Google Patents

Abstract

PURPOSE:To improve steerability by providing two rudders which are arranged in parallel to each other and whose at least partial areas are positioned in the range where they are subjected to the acceleration flow in the rear of one propeller, and by attaching fins to rudders in the direction where thrust can be obtained from generated lift. CONSTITUTION:Tow rudders 4, 5 are arranged in the direction of the boat width within a range where they are subjected to the acceleration flow in the rear of one propeller 1. And a right side fin 6 is attached so as to be protruded to the outside from the right side rudder 4. A left side fin 7 is attached so as to be protruded to the outside from the left side rudder 5. When a ship sails in the direction of the arrow A, the fins 6, 7 generate lift L, and the component of force S in the direction of the arrow A of the lift L becomes thrust, that is, a part of the propulsion power.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rudder of a ship which travels by a propeller.

[0002]

2. Description of the Related Art The relationship between a propeller and a rudder in a conventional ship propelled by a propeller is, for example, as shown in FIGS.
It has a configuration as shown in. In FIG. 6, 11
Is a hull, 12 is a propeller, 13 is a rudder, and 14 is a water surface. Further, in FIG. 7, 15 is a propeller shaft, and 16 is a propeller circle.

That is, conventionally, one rudder 13 is usually arranged behind the propeller 12.

[0004]

However, in the conventional technique, when a large rudder area is required, as shown in FIG.
Since the rudder 13 cannot be arranged in the area of the parallel hatched portion 17 and the height of the rudder 13 is determined by the profile of the hull 11, it is necessary to increase the width of the rudder 13 in order to increase the area. The independent performance of the rudder 13 is reduced. Further, there is a problem that the rotation energy of the propeller 12 is not sufficiently recovered.

The present invention is intended to solve the above problems. That is, an object of the present invention is to provide a rudder of a ship that can generate a large rudder force, has improved maneuverability, and can also sufficiently recover rotational energy of a propeller wake. It is a thing.

[0006]

In order to achieve the above-mentioned object, the present invention has a structure in which at least a part of the two propellers are arranged side by side in a range that receives an accelerated flow behind a propeller. It is assumed that the rudder is provided with fins attached to the rudder in a direction in which thrust is obtained from lift generated.

[0007]

According to the present invention, the conventional single-lens rudder having a small aspect ratio is replaced with two rudders having a large aspect ratio and a large lift coefficient, and the two rudders are placed in the wake of one propeller. Due to the arrangement, a larger rudder force than before can be generated, excellent steering performance of the ship can be obtained, and moreover, the rotational energy of the propeller wake that cannot be collected by the rudder alone is applied to the rudder. Can be collected by fins,
Propulsion performance is improved.

[0008]

1 and 2 show a first embodiment of the present invention. In FIG. 2, reference numeral 1 is a propeller, and FIGS.
1, 2 is a propeller shaft, 3 is a propeller circle in FIG. 1, 4 is a right-hand rudder, 5 is a left-hand rudder, 6 is the right-hand rudder 4 so as to project outward from the right-hand rudder 4. The right fins 7, 7 are left fins attached to the left rudder 5 so as to project outward from the left rudder 5.

That is, acceleration behind one propeller 1
Within the range that receives the flow (parallel diagonal lines in the propeller circle 3 in Fig. 1)
2 rudders 4 and 5 are arranged in the ship width direction. here,
The radius of the propeller circle 3 is r, and the right rudder 4 from the hull centerline 9
The distance at x ₁, Similarly, the distance to the left rudder 5 is x₂Tosu
Then, according to the result of the experiment,
The optimum effect was obtained. Formula 1 0.2r ≦ x₁≦ 0.8r Formula 2 0.2r ≦ x₂≦ 0.8r That is, the distance between the right-side rudder 4 and the left-side rudder 5 is calculated by the formula 3
Is desirable. Formula 3 0.4r ≦ (x₁+ X₂) ≦ 1.6r Further, as shown in FIG. 5, the vessel sails in the direction indicated by arrow A.
When the fin is moved, the fin 6 generates a lift L, and this lift L
Component S in the direction of arrow A is just thrust, that is, thrust
The fins 6 are attached so as to be a part of the progress.
It

Also for the left fin 7, the lift L is
Whether the component is upward or downward, the component force S in the direction of arrow A is attached in a direction that is a part of the propulsion force.

FIG. 3 shows a second embodiment of the present invention, and FIG. 4 shows a third embodiment of the present invention. That is, in the second embodiment, the central fin 8 in which the two rudders 4 and 5 are connected is provided, and in the third embodiment, the fins 6 similar to those in FIG. 2 are provided.
7 and a fin 8 similar to FIG. 3 are provided. In the second and third embodiments, the right rudder 4 and the left rudder 5
Are connected by a central fin 8, the fin 8 also serves as a structural member, and as a result, the fin 8 and the rudder 4, 5 are connected.
Although it also contributes to the reduction of the thickness of the steering wheel, since these three members become an integrated body, it is necessary to devise a mechanism for steering.

[0012]

As described above, according to the present invention,
By replacing the conventional single rudder with a small aspect ratio with two rudders with a large aspect ratio and a large lift coefficient, and by arranging the two rudders in the wake of one propeller, Can generate a large amount of rudder force, which gives excellent controllability of the ship, and can also use the fins attached to the rudder to collect the rotational energy of the propeller wake that cannot be collected by the rudder alone. Performance is improved.

As described above, in a ship that travels with a propeller, the steering performance and propulsion performance can be improved by devising the shape, number, and arrangement of the rudder and the fins attached to it.

[Brief description of drawings]

FIG. 1 is a rear view showing a first embodiment of the present invention.

FIG. 2 is a perspective view of FIG.

FIG. 3 is a perspective view showing a second embodiment of the present invention.

FIG. 4 is a perspective view showing a third embodiment of the present invention.

FIG. 5 is a side view for explaining the operation of the fin of FIG.

FIG. 6 is a side view showing an example of a conventional technique.

FIG. 7 is a rear view showing a part of FIG. 6 in an enlarged manner.

FIG. 8 is a side view for explaining the operation of FIG.

[Explanation of symbols]

 1 Propeller 2 Propeller Axis 3 Propeller Circle 4 Right Rudder 5 Left Rudder 6 Right Fin 7 Left Fin 8 Center Fin

Claims (4)

[Claims] 1. At least a part of the rudder is provided with two rudders arranged in parallel and positioned within a range for receiving an accelerating flow behind one propeller, and the rudder generates lift. A rudder of a ship, characterized in that fins are attached in a direction in which hydraulic power is obtained from the ship. 2. The distance between the two rudders is 0.4 of the propeller radius.
The ship rudder according to claim 1, wherein the rudder is in the range of double to 1.6 times. 3. The ship rudder according to claim 1, wherein the fins project outward from the rudder. 4. The ship rudder according to claim 1, wherein the fin is provided between the two rudders.