KR20090122034A - Ship rudder equipped angles - Google Patents

Abstract

PURPOSE: A ship rudder equipped angles is provided to improve driving control performance of a ship without changing a section or volume of the ship rudder. CONSTITUTION: A ship rudder(20) is positioned in a rear side of a propeller of a ship. The ship rudder includes an angle(20c). The angle is installed in a rear end of the ship rudder. One surface of the angle is protruded while being engaged with a rear part of the ship rudder. The other surface of the angle is attached to the rear part of the ship rudder.

Description

SHIP RUDDER EQUIPPED ANGLES}

The present invention relates to a ship rudder having an angle, and more particularly to a ship rudder provided with an angle at the trailing edge of the ship's rudder to obtain a high lift force at the rudder used for steering control of the ship.

Generally, a propeller (propeller, etc.) and a rudder are provided at the rear of the hull, and when the propeller rotates with the power transmitted from the engine, the forward force of the ship is secured by inducing the flow of the hull wake, and the rudder in the wake induced by the propeller is provided. It is provided, while rectifying the flow to generate a lift for steering control of the vessel.

In relation to the cross-sectional shape of the rudder for ships, research on the section with excellent hydrodynamic performance has been systematically conducted through many experiments in NASA in the US since the 1940's. Is interested in research and development. Moreover, recent developments in Computational Fluid Dynamics (CFD) have made these developments more active, and the use of high CFDs has greatly reduced the number of model experiments required to develop rudder cross-sections. 'S lab is accelerating various developments.

Here, as shown in FIG. 1, the angle of the ship's rudder 10 with respect to the wake is adjusted so that the ship's rudder 10 generates lift with respect to the wake generated by the propeller 3, whereby Steering control is possible. However, in general, the vessel flows around the ship's rudder 10 even if the flow velocity is accelerated by the propeller 3 due to the low speed of the vessel itself and the decrease in the flow velocity of the wake 1 due to the influence of the hull 1. The flow rate is insufficient to generate a sufficient lift force for coordination control of the vessel in the rudder 10 for the vessel.

Therefore, in order to improve the steering control performance of the ship, by applying a ship rudder 10 cross section that can generate a high lift force, or by increasing the area of the ship rudder 10 cross section, Attempts have been made.

However, when the ship rudder 10 is already attached to the hull 1 or when the ship is already built, it is not only difficult to replace it with the ship rudder 10 having a cross section which can generate more lift, but also for ships. Increasing the area of the rudder 10 is also limited by the propeller 3 in the front of the rudder 10 for ships, and is subject to design limitations that must not exceed the transom end 1b in the rear. There was a limit.

In addition, even when extending in the vertical direction of the ship rudder 10 in order to increase the volume of the ship rudder 10 itself, above the ship rudder 10 is limited by the hull 1, and downwards Was also limited by design limitations not to exceed the keel line (1a).

Therefore, there is an urgent need to improve the steering control performance of the ship without changing the shape itself of the rudder 10 for the existing ship or a new ship.

Ship rudder equipped with an angle according to the present invention was devised to solve the above problems, the ship rudder provided with an angle that can improve the steering control performance of the ship without changing the cross section or volume of the ship rudder. The purpose is to provide.

The ship rudder provided with an angle according to the present invention includes a ship rudder positioned at the rear of the propeller of the ship, and an angle provided at the rear end of the ship rudder.

Here, the angle has a "b" shape cross section, it may be provided symmetrically at the rear end of both sides of the camber of the rudder for ships.

In addition, the other side of the angle may be attached in accordance with the rear end of the rudder for ships so that one side of the angle protrudes in accordance with the trailing edge of the rudder for ships.

In addition, the other surface of the angle may be formed in a streamline shape according to the camber shape of the rudder for ship to which the other surface of the angle is attached.

In addition, the angle has a triangular cross-sectional shape, it may be provided symmetrically at the rear end of both sides of the camber of the rudder for ships.

Here, the first surface of the angle that directly receives the flow flowing around the rudder for the vessel may be formed to have a shape continuous with the shape of the camber.

Here, the first surface of the angle attached to the ship rudder may be formed in a streamline shape according to the camber shape of the ship rudder, and the third surface of the angle may be formed in a plane.

Vessel rudder equipped with an angle according to the present invention has the effect of generating a high lift so as to improve the steering control performance of the vessel without changing the cross section or volume of the vessel rudder.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in the following description of the present invention, if it is determined that the detailed description of the related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of a user or an operator. Therefore, the definition should be made based on the contents throughout the specification.

Figure 2a and 2b is a schematic side view showing the position of the rudder for ships provided with an angle according to an embodiment of the present invention, Figures 3a and 3b is a partial exploded view of the rudder for ships provided with an angle according to an embodiment of the present invention 4 is a bottom view of a ship rudder having an angle according to an embodiment of the present invention, viewed from below, and FIGS. 5A and 5B illustrate a part of the ship rudder having an angle according to another embodiment of the present invention. Exploded perspective view.

As shown in Figures 2a and 2b, the ship rudder 20 with an angle according to the present invention is a propeller (3) to accommodate the flow flowing from the propeller (3) provided at the rear of the hull (1), that is, the bottom of the rear And an angle 20c attached to the ship's rudder 20 and the ship's rudder 20 located behind the vessel 3).

FIG. 2A illustrates the present invention applied to a general marine rudder equipped with a rudder blade horn 20a for ships and a rudder blade 20b for ships, and FIG. 2B is another example of the rudder 20 for ships. The present invention is applied to a one-piece marine rudder.

Here, the ship rudder 20 provided with an angle according to the present invention can be applied to both a general ship rudder and an integrated ship rudder, but will be described below in detail with respect to the general ship rudder.

As shown in FIG. 2A, in a general ship rudder, the ship rudder blade 20b is formed to be rotatable with respect to the ship rudder horn 20a, thereby allowing steering control of the ship. At this time, the ship rudder 20 cannot exist beyond the transom end 1a and the kill line 1b so as not to interfere with the control of the entire area of the hull 1.

Here, as shown in Figure 3a or 4, the rudder blade 20b for ships has a cross-sectional shape designed to receive the flow of the fluid smoothly. For example, the NACA cross section may be used as the cross section of the rudder blade 20b for ships, and of course, the MANDEL cross section, the MARIN cross section, and the EPH cross section may be used.

Here, the NACA cross section refers to a series of National Advisory Committee for Aeronautics (NACA) series, and the cross section used for the rudder blade 20b for ships is a right camber of the cross section to ensure symmetry in the steering of the ship. Symmetrical wings of the same and left camber are generally used. In the case of the symmetrical blade, since the right camber 21a and the left camber 21b are the same, the average camber line becomes the same as the demonstration line which is the center line of the cross section.

In addition, as shown in Figure 3a or 4, the angle (20c) may be formed to have a cross-section of the "b" shape. At this time, the angle (20c) is formed in the form of a beam having a cross section of the "b" shape, symmetrical to the right camber 21a and the left camber 21b of the ship rudder blade 20b of the ship rudder 20, respectively It is provided as an enemy.

At this time, the angle (20c) can be formed to be attached to the rudder blade (20b) for ships, the method of attaching may be used a variety of methods such as welding.

In this case, the angle 20c may be attached to the rear edge 23 of the rudder blade 20b for ships. That is, the corner where one surface and the other surface in the "a" shape is matched with the rear front line 23, it can be attached so that there is no portion protruding vessel rudder blade 20b to the rear of the angle (20c).

In addition, in the case of one surface of the angle 20c attached to the ship's rudder blade 20b, the portion of the ship's rudder blade 20b to be attached is attached so that the ship's rudder blade 20b is attached in accordance with the streamlined shape. It is manufactured to be streamlined to match the streamlined shape, so that its adhesion can be increased.

Here, the angle of angle formed by one surface and the other surface of the angle (20c) can of course be produced in a variety of adjustments to the above contents.

The flow around the rudder 20 for ships provided with an angle according to an embodiment of the present invention having the above configuration will be described with reference to FIG. 4.

As shown in FIG. 4, the flow flowing from the propeller 3 flows along the right camber 21a and the left camber 21b of the rudder blade 20b for ships. At this time, the angle 20c attached to the rear of the rudder blade 20b for ships acts as an obstacle of such flow, and the flow of the right camber 21a and the left camber 21b passing through the angle 20c is an angle. After the angle 20c is moved away from the outside of 20c, it is gradually collected again.

In this case, vortex (V, Vortex) is generated between one surface of the angle 20c and the other surface. Occurrence of this vortex (V) is a common phenomenon from a hydrodynamic point of view. Specifically, the vortex (V) refers to a portion in which a rotational motion of the fluid velocity vector is not zero, and is formed by a motion difference in each fluid portion, and flows through the right camber 21a and the left camber 21b. The motion difference between the flow close to the angle 20c and the flow close to the angle 20c is generated while meeting the obstacle of the angle 20c, so that a part of the flow rotates between one side and the other side of the angle 20c to generate a vortex. will be.

Here, the vortex V generated between one surface and the other surface of the angle 20c acts as an obstacle of flow flowing along both cambers 21a and 21b, but does not directly impede the flow of the flow, that is, buffering. It will function as an obstacle that plays a role. Thus, the flow passing through both cambers 21a and 21b moves along the rotational area of the vortex V and moves past the angle 20c. Moreover, the flow through the vortex V becomes more accelerated.

By this movement of the flow, the point where the flow passing through both cambers 21a and 21b approaches the ship's rudder blade 20 is considerably separated from the trailing edge 23 rather than the trailing edge 23 of the ship's rudder 20. This flow is substantially the same as if the ship's rudder blades 20b were formed extending to this point. In other words, it functions as extending the chord length of the rudder 20 for ships.

Thus, it is possible to induce the same flow as when the cross-sectional area of the ship's rudder blade 20b is increased without increasing the cross-sectional area of the ship's rudder blade 20b, thereby controlling the steering control performance of the ship in the ship's rudder 20. Can improve.

Another embodiment of a ship rudder equipped with an angle according to the present invention will be described with reference to FIG. 5A. Description of the components substantially the same as the embodiment of the rudder for ships provided with an angle according to the present invention will be omitted.

As shown in Fig. 5a, the ship rudder 30 provided with an angle according to the present invention has a ship rudder horn 30a, a ship rudder blade 30b, and an angle 30c. The angle 30c is attached along the trailing edge 33 of the rudder blade 30b for ships.

Here, the angle 30c has a triangular cross-sectional shape. The triangular cross-sectional shape includes the case where the inside is empty as well as the case where the inside is empty. At this time, the angle 30c may be provided symmetrically at the rear ends of both sides of the camber of the rudder blade 30b for ships.

In this case, the triangular cross section of the angle 30c includes a first surface directly receiving the flow flowing around the vessel rudder 30 and a second surface attached to the vessel rudder blade 30b of the vessel rudder 30; And the remaining third side.

Here, the first surface of the angle 30c is a streamlined shape of both cambers 31a and 31b in the ship rudder 30 so that the flow flowing along both cambers 31a and 31b of the ship rudder blade 30b is smoothly continued. It may be formed in a streamlined shape to have a shape and a continuous shape, the second surface of the angle (30c) angle 30c to be attached to both sides of the camber (31a, 31b) of the rudder blade (30b) of the ship rudder 30 well ) May be formed to have the same shape as the streamline of the portions of the both side cambers 31a and 31b to which they are attached.

In this case, the third surface of the angle 30c may be designed to have various shapes, and may be formed in a plane.

In another embodiment of the rudder for ships provided with an angle according to the present invention, unlike one embodiment of the rudder for ships provided with an angle according to the present invention, the votex (V in FIG. 4) does not occur, but the ship rudder 30 An embodiment of the ship's rudder equipped with an angle according to the present invention, while the flow flowing along both side cambers 31a and 31b of the ship's rudder blade 30b flows along the first surface of the angle 30c Achieve the same action.

Next, as shown in Figure 2b, the angle 20c of the present invention can be applied to the integrated vessel rudder 20 as well. The integrated ship rudder 20 is a ship rudder 20 in which a drive shaft (not shown) extending from the hull 1 is located in the ship rudder 20 and formed integrally.

As shown in Figs. 3b and 5b, the angles 20c and 30c described in detail in the above two embodiments of the present invention can be similarly applied, and the construction and operation are the same as those described in detail above, and thus will be omitted. .

1 is a schematic side view showing the position of a general rudder for ships,

Figure 2a and 2b is a schematic side view showing the position of the rudder for ships provided with an angle according to an embodiment of the present invention,

3a and 3b is a partially exploded perspective view of the rudder for ships provided with an angle according to an embodiment of the present invention,

4 is a bottom view of a ship rudder having an angle according to an embodiment of the present invention viewed from below,

5a and 5b is a partially exploded perspective view of a rudder for ships provided with an angle according to another embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

1: hull 3: propeller

10, 20, 30: ship's rudder 10a, 20a, 30a: ship's rudder horn

10b, 20b, 30b, ship rudder blades 21a, 31a: right camber

21b, 31b: Left Camber 23, 33: Backward

20c, 30c: Angle V: Botex

Claims (7)

A rudder for ships located behind the propeller of the ship, An angle provided at the rear end of the rudder for ships Ship's rudder with angle. The method of claim 1, The angle has a cross-section of the "b" shape, is provided symmetrically to the rear end of both sides of the camber of the ship rudder Ship's rudder with angle. The method of claim 2, The other surface of the angle is attached to the rear of the rudder for the ship so that one surface of the angle protrudes to the trailing edge of the rudder for the ship. Ship's rudder with angle. The method of claim 1, The other surface of the angle is formed in a streamline shape according to the camber shape of the rudder for ship to which the other surface of the angle is attached. Ship's rudder with angle. The method of claim 1, The angle has a triangular cross-sectional shape, is provided symmetrically to the rear end of both sides of the camber of the rudder for ship Ship's rudder with angle. The method of claim 5, wherein The first surface of the angle that directly receives the flow flowing around the rudder for the vessel is formed to have a continuous shape with the shape of the camber Ship's rudder with angle. The method according to claim 5 or 6, The first surface of the angle attached to the ship rudder is formed in a streamlined shape according to the camber shape of the ship rudder, the third surface of the angle is formed in a plane Ship's rudder with angle.

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