JPS6154398A - Rudder with vortex generator - Google Patents

Abstract

PURPOSE:To reinforce rudder power greatly in steering without increase of resistance in straight sailing by providing a vortex generator driving mechanism which projects the vortex generator from the rudder side face on the low pressure side according to the difference in pressure of both the sides of the rudder. CONSTITUTION:A pressure difference detecting means P detecting pressure difference of both sides of a rudder is constructed with a hole 4, a piston 6 or a spring 5. And a vortex generator driving mechanism D projecting a vortex generator 3 from a rudder side face of the low pressure side according to the pressure difference detected is constructed. And a vortex generator guide mechanism G enabling the vortex generator 3 projecting from the rudder side face is constructed. Thus, when the vortex generator 3 is projected from the outside face of the rudder on the low pressure side, longitudinal vortex is generated at the rear side, and by this longitudinal vortex, flow field of the outside of the rudder where break away of flow will easily occur becomes stable flow and large rudder force can be generated.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a rudder attached to a ship.

[Conventional technology]

Conventionally, in the rudder of upbound ships, in order to obtain a large rudder force,
Dog-like measures are being taken. That is, (1) increase the rudder area by using a plurality of rudders.

(2) The length of the rudder (increase the 4 ratio and increase the lift coefficient).

(3) Set the maximum possible amount of steering to a value greater than the normal 35°.

(4) Attach 7 laps to the rear of the snake, and adjust the 7 wraps according to the amount of steering.
Equipped with a mechanism that allows the angle of attack to be adjusted.

(5) Combine the rudder and a small propulsion device to apply thrust in the direction of the t42 rudder.

[Problem that the invention seeks to solve]

The various types of rudder force enhancement means described above are decided upon in consideration of the purpose of the ship, the shape of the stern, etc., but each method has its own problems and disadvantages, as described below.

(1) With the means described in item (1) above, although the steering force increases, the frictional resistance due to the increase in the rudder surface also increases accordingly, resulting in a waste of energy.

(2) With the means described in item (2) above, if a vertically elongated rudder can be used, a large rudder force can be obtained with a small rudder angle, but if the rudder is removed by 4 lbs. -1
1st period comes out.

(3) With the means described in item (3) above, in the case of a rudder with a large amount of steering, the steering gear will inevitably be large, leading to increased cost and weight, and in the case of a two-rudder ship, Maximum steering IL9
It is necessary to devise a stern 7 lame line so that it does not come into contact with the hull.

(4) With the means described in item (4) above, the rudder force is greatly increased, but a mechanism is required to properly connect the rudder and the seven lances, which increases the complexity of the structure and increases the cost. (In addition, the probability of late IO etc. also increases.)

(5) With the means described in item (5) above, a sufficient steering force ζ can be obtained, but the mechanism is complicated and costs increase.

The present invention aims to solve these problems.
An object of the present invention is to provide a rudder with a vortex generator that can obtain a large rudder force by protruding a vortex generator that generates a longitudinal vortex from the side surface of the rudder on the low pressure side when the rudder is turned. do.

[Means for solving problems]

Therefore, the rudder with a vortex generator of the present invention includes a vortex generator stored inside the rudder and a number of vortex generator guide structures that allow the vortex generator to protrude from the rudder side. A pressure difference detection means for detecting a pressure difference, and a vortex generator driving mechanism for projecting the vortex generator from the low pressure side rudder side in response to the pressure difference detected by the pressure difference detection means. It is characterized by

[Effect]

In the above-mentioned rudder with a vortex generator of the present invention, the vortex generator is caused to protrude from the rudder side on the bottom pressure side (the outside side of the building where a turn is to be made) in response to the pressure difference on the rudder side. A longitudinal vortex is generated by the protrusion of the generator, and the flow field on the low-pressure side rudder side becomes a stable flow due to this longitudinal vortex. As a result, it greatly contributes to increasing the steering force.

〔Example〕

Hereinafter, a rudder with a vortex generator as an embodiment of the present invention will be explained with reference to the drawings. Fig. 1 is a side view showing the state of its installation, and Fig. 2 shows a large number of vortex generators provided on the rudder 1111+. Figure 3 is a cross-sectional view to explain how the vortex generator is installed on the rudder, and Figures 4.5 and 4.5 are cross-sectional views showing the arrangement of the vortex generator in the fλ formula. FIG. 5 is an F5!5 diagram for explaining the operating principle of the generator.

As shown in FIG. 1, a rudder 2 is attached to the rear of the propeller 1 at the stern of the ship.

As shown in figures pA1 to pA3, a large number of plate-shaped vortex generators are disposed vertically on both sides 2a and 2b of the rudder 2, respectively.

Each vortex generator 3 is arranged in pairs at the same level on each side 2g, 2b of the rudder, and the corresponding vortex generator article 3.3 is attached to the snake 2 in the following manner. .

That is, as shown in FIG. 3, the rudder 2 has a large number of holes 4 formed therethrough at the top and bottom, and inside each hole 4,
It is loaded with a spring 5 biasing it in the tension direction.

The inner end of each spring 5 is fixed to the rudder 2 at the center of the hole 4 via a pin or the like, and the outer end is fixed to the iSi at the center of the hole 4.
A piston 61 that is movably fitted is connected. Because of this, each piston 6 is urged inward into the hole 4 by Js5.

Further, a vortex generator 3 is connected to each piston 6 via a rod 7.

Note that the spring loading space formed in the open piston 6 is filled with seawater or the like.

Now, to simplify the explanation, as shown in Figure 4.5,
Regarding the case where the vortex generator 3 is installed on one side of the rudder,
The operating principle of the protrusion and retraction of the vortex generator 3 will be explained.

First, if we consider the case when the steering angle is zero and the steering angle is zero, the pressure difference on the control surface side is 1r zero, so the piston 6
The pressures acting on both sides of the vortex generator 3 are balanced, so that only the tensile biasing force by the spring 5 acts on the vortex generator 3 via the piston 6, so that the vortex generator 3 Since the vehicle is in a retracted state, there is no increase in resistance when driving straight.

Next, let us consider the case where the rudder 2 is operated to take a certain large rudder angle. In this case, assuming that by turning the rudder 2, one rudder side surface 2a becomes the outer surface with lower pressure, and the other rudder side surface 2b becomes the inner surface with higher pressure than the outer surface 2a, in this case, the rudder surface +1111 The pressure difference acts on the piston 6, and the piston 6 is driven to the low pressure 11111 against the force t of the spring 5.

As a result, the vortex generator 3 protrudes from the rudder side surface 2uh on the low pressure side.

Therefore, the hole 4, the piston 6, the spring 5, etc. constitute a pressure difference detection means P that detects the pressure difference on the control surface side, and the vortex generator 3 is connected to the low pressure side rudder surface according to the detected pressure difference. It comprises a vortex generator drive +11 structure that allows the vortex generator to protrude from the rudder side, and also comprises a vortex generator guide fusion G that allows the vortex generator 3 to protrude from the rudder side.

As described above, the vortex is generated from the outside side of the building on the low pressure side:;
When 3 protrudes, a longitudinal vortex is generated behind it, but this longitudinal vortex creates a stable flow in the flow field outside the building, where flow separation is likely to occur, making it possible to generate a large steering force.

In addition, even when the vortex generator () is installed on the control surface side as shown in Figure 3, the principle of the protruding and retracting operation of the vortex generator (!) is based on the same principle as explained in Figure 4.5. do.

Also, in Figure 3, there are nails (as shown by the lines, springs!
I11 may be allowed to communicate with the side surface of the control surface via the check valve 8.

Furthermore, a sensor (pressure difference detection means) that directly or indirectly detects the pressure difference on the rudder surface side is provided, and a vortex generator drive mechanism for driving the vortex generator 3 to protrude and retract inside the rudder 2 is configured. The external side of the building when the vortex generator 3 is rotated by incorporating an actuator (/II+pressure serial cylinder may be used) and operating the 7 actuators based on the detection results from the above sensor using a funiputer command. It may also be made to protrude from.

〔Effect of the invention〕

As detailed above, according to the rudder with a vortex generator of the present invention, the vortex generator stored inside the rudder and the vortex generator guide rock structure that allows the vortex generator to protrude from the side surface of the rudder are combined. A pressure difference detection means for detecting a pressure difference on the control surface side, and a vortex generator drive mechanism that causes the vortex generator to protrude from the low pressure side rudder surface in response to the pressure difference detected by the pressure difference detection means. The rr3 element (1η configuration) has the advantage that the steering force can be significantly increased during steering without increasing the resistance when moving straight.

[Brief explanation of drawings]

The figure shows a vortex generator iτ1 rudder as an embodiment of the present invention, and figure fj&1 is a side view showing the state of its installation.
Figure 2 shows g/fL! installed on the side of the control surface! Figure 3 is a cross-sectional view schematically showing the arrangement of the vortex generator L, Figure 3 is a cross-sectional view to explain how the vortex generator is attached to the rudder, and Figures 4.5 and 4. This is a (λ formula diagram) for explaining the operating principle of the vortex generator. 1. Propeller, 2. Rudder, 2a, 21+... Rudder 11
Surface, 3. Vortex generator, 4. Hole, 5. Bah, 6. Piston, 7. Rod, 8. Check valve, D. Vortex generator drive mechanism, G. Vortex. 11qi for generator guide, P.
・Pressure difference detection means. Sub-Agent Patent Attorney Yoshihiko Iinuma Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] A pressure difference detection means that includes a vortex generator stored inside the rudder and a vortex generator guide mechanism that allows the vortex generator to protrude from the side of the rudder, and detects a pressure difference on both sides of the rudder; A rudder with a vortex generator, characterized in that it is provided with a vortex generator drive mechanism that causes the vortex generator to protrude from a low-pressure side rudder side in response to a pressure difference detected by the means.