KR20130038054A - A ship - Google Patents

Abstract

PURPOSE: A ship is provided to effectively prevent the delivery of noise and vibration caused by the operation of a propeller. CONSTITUTION: A ship comprises a hull(110) and a fluctuation pressure reducing module(140). A propeller is coupled to the tail end of the hull to generate propulsion force. The fluctuation pressure reducing module is coupled to the wall of the hull close to the propeller and has a protrusion part protruded from the outer surface of the hull. The fluctuation pressure reducing module generates bubbles to prevent the delivery of fluctuation pressure caused by the operation of the propeller to the hull. [Reference numerals] (AA) Stem; (BB) Stern;

Description

Ship {A ship}

The present invention relates to a ship, and more particularly, to a ship that can effectively block the phenomenon that the noise and vibration caused by the operation of the propeller to the hull.

1 is a view showing an example of a conventional ship propulsion engine.

Referring to this figure, an ordinary ship comprises a hull 1, a propeller 2 rotatably coupled to the rear of the hull 1 to generate a propulsive force, a rudder 3 for changing the direction of the hull 1 , rudder).

When the propeller 2 is rotated in water, the water flows to the wing surface of the propeller 2 to generate a hydraulic pressure difference on the front and back of the wing surface of the propeller 2, the driving force is generated by the pressure difference.

However, when the propeller 2 is operated as shown in FIG. 1, that is, when the propeller 2 is rotated in water, a pressure fluctuation occurs in the water due to the propeller 2 as a rotating body, and the fluctuation pressure generated in this way is the hull 1. Is transmitted to the hull (1) acts as a factor for generating noise and vibration.

In particular, when cavitation is generated on the surface of the propeller 2 by the propeller 2, noise and vibration are severely generated in the hull 1, which is included in the water when a low pressure occurs in the water. This is because bubbles are generated in the water as the gas is released from the water and is collected at a low pressure, and when the bubbles are generated at a high pressure, the bubbles are rapidly broken to generate strong fluctuation pressure in the water.

In order to prevent the noise and vibration of the hull due to the fluctuation pressure, the propeller (2) design the shape or size of the wing itself differently, to improve the shape of the ship aft, or to add a separate reinforcement to block the noise and vibration Attempting to apply or apply a variety of methods, such as attaching a guide device for guiding the flow of water flowing from the bow, or reducing the size of the propeller (2), it is difficult to obtain a substantial effect, Losses may occur elsewhere.

On the other hand, the noise and vibration problems transmitted to the hull 1 due to the fluctuation pressure by the propeller 2 are urgent in the case of a ship that is intended to be cruised or a quiet ship such as a warship, for example. It is a matter that needs to be solved easily, and appropriate improvement measures are required.

none

Therefore, the technical problem to be achieved by the present invention is to provide a ship that can effectively prevent the phenomenon that the noise and vibration caused by the operation of the propeller to the hull.

According to one aspect of the invention, the propeller for generating a propulsion hull coupled to the rear; And a protrusion coupled to the wall surface of the hull adjacent to the propeller, the protrusion protruding from the outer surface of the hull, and generating bubbles to the outer surface of the hull through a bubble spray hole formed in the protrusion. A vessel may be provided that includes a variable pressure reducing module that prevents the variable pressure generated during the transfer to the hull.

It may further include a compressed air supply unit for supplying compressed air to the variable pressure reduction module.

And a bottom plug coupled to a wall surface of the hull, and the variable pressure reducing module may be detachably coupled to the bottom plug.

The variable pressure reduction module may include: a module body having a compressed air flow line through which the compressed air flows and coupled to be inserted into a through part of the bottom plug, wherein the protrusion is formed at one side thereof; And a body flange formed on the other side of the module body and disposed in the seat jaw of the bottom plug.

The body flange and the bottom plug may be provided with a plurality of first and second through-holes communicated with each other to fasten the bolt.

The protrusion includes an inclined wall portion inclinedly connected to one side of the module body; And an upright wall portion vertically disposed at a surface of the module body at an end of the inclined wall portion.

The compressed air flow line may include a straight section having one end connected to the compressed air supply unit and extending along the longitudinal direction of the module body; And an intersection section disposed in the protrusion and intersecting with the linear section and having the bubble jetting hole formed at an end thereof.

An arc guide portion for guiding the compressed air may be further formed between the straight section portion and the cross section portion.

The plurality of compressed air flow lines may be independently arranged.

The compressed air supply unit, a compressor provided on one side of the hull; And it may include a compressed air supply line for directly connecting the compressor and the variable pressure reduction module.

The fluctuating pressure reduction module may be disposed in the fore-going direction with respect to the central axis of the propeller so as to generate bubbles in the stern direction.

The variable pressure reduction module may be disposed within a range that does not deviate from the diameter of the propeller with respect to the center axis of the propeller.

It may further include a porous cap coupled to the bubble injection hole region.

A plurality of through holes may be formed on the surface of the porous cap, and a detachable coupling portion may be further provided on the outer surface of the porous cap so as to be detachably coupled to the variable pressure reduction module.

According to the present invention, it is possible to effectively prevent the phenomenon that the noise and vibration caused by the operation of the propeller to the hull.

1 is a view showing an example of a conventional ship propulsion engine.
2 is a schematic side view of a ship according to a first embodiment of the present invention.
3 is an image according to the use state of the variable pressure reducing module shown in area A of FIG.
4 is an enlarged structural view of the area A in Fig.
5 is an exploded view of Fig.
Fig. 6 is a perspective view of Fig. 5. Fig.
7 is a rear perspective view of the variable pressure reducing module.
8 is a schematic diagram showing a state in which the variable pressure reducing module is disposed.
9 is a schematic diagram of a state in which the variable pressure reducing module is disposed in the ship according to the second embodiment of the present invention.
10 is a cross-sectional structural view of a variable pressure reducing module region in a ship according to a third embodiment of the present invention.
11 is a cross-sectional structural view of a variable pressure reducing module region in a ship according to a fourth embodiment of the present invention.
12 is a cross-sectional structural view of a variable pressure reducing module region in a ship according to a fifth embodiment of the present invention.

In order to fully understand the present invention, operational advantages of the present invention, and objects achieved by the practice of the present invention, reference should be made to the accompanying drawings and the accompanying drawings which illustrate preferred embodiments of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements.

FIG. 2 is a schematic side view of a ship according to a first embodiment of the present invention, and FIG. 3 is an image according to a use state of the variable pressure reducing module shown in a region A of FIG.

2 to 3, the ship of this embodiment, the propeller 120 for generating a propulsion force is coupled to the hull 110 and the wall surface of the hull 110 adjacent to the propeller 120, the hull is coupled to the hull Variable pressure reducing module 140 for generating a bubble to the outer surface of the 110 to transmit the fluctuation pressure generated during operation of the propeller 120 to the hull 110 to prevent noise and vibration generated in the hull 110 ) May be included.

The ship shown in FIG. 1 may be any of a commercial vessel, a warship, a fishing vessel, a carrier, a drill ship, a cruise ship, and a special operation line, and may include a floating sea structure.

A directional ridge 130 for adjusting the traveling direction of the ship may be provided around the propeller 120. The rudder 130 may include a rudder 131 and a bulb 135 coupled to the rudder 131 between the propeller 120 and the rudder 131. Of course, since the bulb 135 is not necessarily provided, the right scope of the present invention can be applied to the direction without the bulb 135 as well.

Meanwhile, as described above, when the propeller 120 is operated, that is, when the propeller 120 is rotated in the water, a fluctuation pressure is generated in the water due to the propeller 120 as a rotating body. Is transmitted to the hull 110 to generate noise and vibration.

In particular, the noise and vibration transmitted to the hull 110 may be a big problem, for example, in the case of a ship that is intended for excursion, such as a cruise ship, or a ship that requires a quiet operation, such as a warship, in order to prevent such a phenomenon. That is, in the present embodiment, in order to prevent noise and vibration generated from the hull 110 by transmitting the fluctuation pressure generated in the water due to the propeller 120 during the operation of the propeller 120, the hull 110 is changed. The pressure reduction module 140 is proposed.

The variable pressure reducing module 140 applied to the present embodiment may be provided on the wall surface of the hull 110 adjacent to the propeller 120 and generates bubbles as shown in the image of FIG. 3. Is formed on the outer surface of the hull 110 so that the bubble layer blocks or otherwise absorbs the fluctuation pressure, thereby preventing noise and vibration from occurring in the hull 110 due to the fluctuation pressure. This will be described in more detail with reference to FIGS. 2 to 8. For reference, although two variable pressure reducing modules 140 are provided in the drawing, one variable pressure reducing module 140 or three or more variable pressure reducing modules 140 may be provided.

3 is an image according to the use state of the variable pressure reducing module shown in region A of FIG. 2, FIG. 4 is an enlarged structural diagram of region A of FIG. 2, FIG. 5 is an exploded view of FIG. 4, and FIG. 6 is FIG. 6. 5 is a perspective view of FIG. 7 is a rear perspective view of the variable pressure reducing module, and FIG. 8 is a schematic view of a state in which the variable pressure reducing module is disposed.

2 to 8, the variable pressure reducing module 140 of the present embodiment is coupled to the wall surface of the hull 110 adjacent to the propeller 120, but protruding portion 141 protrudes from the outer surface of the hull 110. And a bubble is generated on the outer surface of the hull 110 through the bubble spray hole 141a formed in the protrusion 141 to transfer the fluctuation pressure generated during operation of the propeller 120 to the hull 110. It acts to discourage being.

In order for the variable pressure reducing module 140 to be coupled, a bottom plug 160 is coupled to a wall surface of the hull 110. The variable pressure reducing module 140 generates air bubbles on the outer surface of the hull 110 by receiving the compressed air by the compressed air supply unit 170 provided on the hull 110.

Prior to the description of the variable pressure reducing module 140, the bottom plug 160 and the compressed air supply unit 170 will be described first. First, the bottom plug 160 is a part mounted on the wall surface of the hull 110 and serves as a cap for draining water introduced into the hull 110.

Since the bottom plug 160 is opened only when necessary, it is not necessary to disconnect the bottom plug 160 from the hull 110 at normal times.

As shown in FIG. 5, a plug coupling hole 111 for coupling the bottom plug 160 is formed in the hull 110 so that the bottom plug 160 is coupled to the corresponding position.

The first inclined surface 112 and the first horizontal surface 113 are formed on the outer wall of the plug coupling hole 111, and the second inclined surface 161 and the second horizontal surface 162 are also formed in the bottom plug 160. do.

By this structure, the bottom plug 160 may be coupled to the plug coupling hole 111. At this time, the bottom plug 160 may be advantageous in that it is easily assembled or screwed into the plug coupling hole 111 so that it is not easily separated.

Next, the compressed air supply unit 170, as shown in FIG. 2, a compressor 172 disposed in a steering gear room 171 provided on one side of the hull 110, and a compressor 172. ) And a compressed air supply line 173 for directly connecting the variable pressure reducing module 140. In this embodiment, although the compressor 172 is provided in the steering gear room 171, the compressor 172 can also be arrange | positioned in the other place of the ship body 110. As shown in FIG. Therefore, the scope of the present invention can not be limited to the shape of the drawings.

If one variable pressure reducing module 140 is applied, it is sufficient if one compressed air supply line 173 is also provided. If the variable pressure reducing module 140 is two or more as in this embodiment, If the number is applied, the compressed air supply line 173 may be used to pull out the number of the variable pressure reducing module 140.

Compressed air supply line 173 may be provided with a plurality of valves (174a, 174b). The valves 174a and 174b may be solenoid valves that are electronically controllable.

Meanwhile, the variable pressure reducing module 140 is detachably coupled to the bottom plug 160, as shown in Figs.

When the variable pressure reducing module 140 is coupled to the bottom plug 160, the variable pressure reducing module 140 can be easily installed and maintained.

However, the scope of right of the present embodiment is not limited thereto, so that the variable pressure reducing module 140 does not necessarily have to be coupled to the bottom plug 160. For example, the variable pressure reducing module 140 may be integrally embedded in the wall surface of the hull 110, and such a structure is also within the scope of the present invention.

In the present embodiment, as shown in FIG. 8, the fluctuation pressure reducing module 140 is provided at two positions offset from the propeller 120 along the rotating direction of the propeller 120. However, the variable pressure reducing module 140 may be provided at a position opposite to the position shown in Fig. In addition, the number of the variable pressure reducing modules 140 can be appropriately selected depending on the volume of the ship.

Referring to FIG. 2, the fluctuating pressure reducing module 140 determines a position of the propeller 120 on the basis of the center axis C of the propeller 120, So that bubbles can be generated in the stern direction.

8, when the diameter D1 of the propeller 120 is drawn on the basis of the center axis C of the propeller 120, the fluctuating pressure reducing module 140 changes the diameter of the propeller 120 (D1).

When the variable pressure reducing module 140 has such a positional feature, the variable pressure can be reduced while generating bubbles more effectively, and thus the noise and vibration caused by the operation of the propeller 120 are hull 110. ) Can be effectively prevented, and this has been confirmed through experiments.

5, the fluctuating pressure reducing module 140 includes a compressed air flow line 143 in which compressed air flows, a module body 160 inserted in the penetrating portion 163 of the bottom plug 160, And a body flange 144 formed on the other side of the module body 142 and disposed in the seat jaw 164 of the bottom plug 160. [

The module body 142 may be provided as a cylindrical structure and is coupled to be inserted into the through part 163 of the bottom plug 160. The module body 142 may be made of plastic injection molding.

A protrusion 141 is formed at an insertion end of the module body 142. After the module body 142 is inserted into the through part 163 of the bottom plug 160, the protrusion 141 is formed on the hull 110. It takes the form protruding from the outer surface. Therefore, bubbles may be distributed while forming a constant thickness layer along the outer surface of the hull 110 through the bubble spray holes 141a formed at the end of the protrusion 141.

The projecting portion 141 protruding from the outer surface of the hull 110 includes an inclined wall portion 141b inclinedly connected to one side of the module body 142 and an inclined wall portion 141b formed at the end of the inclined wall portion 141b, And an upright wall portion 141c vertically disposed on the surface of the base portion 141c. As the protrusion 141 has the inclined wall portion 141b, that is, the frictional resistance with water can be reduced by the structural streamlined shape of the inclined wall portion 141b.

In the structure of the protrusion 141, the bubble injection hole (141a) may be formed in the vertical wall portion (141c), the bubble injection hole (141a) may be a circular hole or an oval hole, the number is also appropriately selected Can be.

The body flange 144 and the bottom plug 160 are provided with a plurality of first and second through holes 144a and 160a which communicate with each other such that the bolt B is fastened. As shown in FIG. 6, the number of the first and second through holes 144a and 160a is four, but the number of the first and second through holes 144a and 160a can be appropriately changed.

4 and 5, one end of the compressed air flow line 143 is connected to the compressed air supply line 173 of the compressed air supply unit 170 and extends along the longitudinal direction of the module body 142 And an intersection section 143b which intersects the linear section 143a and is formed in the protrusion 141 and has a bubble spray hole 141a formed at an end thereof.

The reason why they are made by separating the straight section 143a and the cross section 143b and then communicating them is because it is difficult to drill once. If the drilling is easy, they may be manufactured integrally.

Although the compressed air flow line 143 is shown as an empty space in the drawing of the present embodiment, the compressed air flow line 143 is used to flow the compressed air flow line 143 through the compressed air flow line 143, It may be desirable that a compressed air flow line 143 is further provided with a valve or a shielding plate and controlled so as to be opened or closed as necessary.

The operation of the variable pressure reducing module 140 having such a configuration will be described below.

When the compressor 172 is operated and compressed air is supplied through the compressed air supply line 173, the compressed air flows along the straight section 143a and the cross section 143b to flow through the bubble spray hole 141a. Sprayed in water

When the strong compressed air is injected in the water, the compressed air injected forms air bubbles. As shown in FIG. 2 or FIG. 4, the generated air bubbles form a bubble layer having a certain thickness on the outer surface of the hull 110 .

In particular, the bubble layer may be formed to have a large or constant thickness on the outer surface of the hull 110 at a position adjacent to the propeller 120 so as to block or absorb the fluctuating pressure generated by the propeller 120.

Such a bubble layer can serve as a cushion layer for blocking or absorbing the fluctuating pressure as described above. Actually, when the fluctuation pressure reduction module 140 is applied and tested, it has been confirmed that the magnitude of the fluctuation pressure is reduced by 20% or more.

Taken together, when the variable pressure reduction module 140 of the present embodiment is applied to the hull 110, it is possible to effectively prevent the phenomenon that the noise and vibration caused by the operation of the propeller 120 to the hull 110.

Therefore, in the case of ships intended for excursion like cruise ships or ships that require quiet operation such as warships, it is possible to appropriately solve the noise and vibration problems caused by the ships.

In particular, the same structure as the present embodiment, the propeller 120, the shape or size of the wing itself differently as in the prior art, to improve the shape of the ship's tail, or to add a separate reinforcement for blocking noise and vibration, or bow Noise and vibration by reducing the overall loss that can be generated from the variable pressure reduction method, such as attaching a guide device for guiding the flow of water flowing from the water, or reducing the size of the propeller 120 As an effective improvement of the problem, rather, the size of the propeller 120 may be greatly increased, which may help to improve the driving force.

9 is a schematic diagram of a state in which the variable pressure reducing module is disposed in the ship according to the second embodiment of the present invention.

In the present embodiment, the ship is equipped with a pair of propellers 220 is mounted on the hull 210, in the case of such a vessel, the variable pressure reduction module 140 at each position of the pair of propellers 220 It is coupled to the wall surface of the adjacent hull 210 can reduce the noise and vibration transmitted to the hull 210.

In particular, in the case of the ship shown in Figure 9, the variable pressure reduction module 140 is coupled to the wall surface of the hull 210 in a position biased to one side along the direction in which the propellers 220 are rotated to reduce the variable pressure.

10 is a cross-sectional structural view of a variable pressure reducing module region in a ship according to a third embodiment of the present invention.

In the case of this embodiment, the structure of the compressed air flow line 343 provided in the fluctuation pressure reducing module 340 is different from that of the first embodiment.

That is, in this embodiment, in the case of the compressed air flow line 343, an arc guide portion 343c for guiding compressed air is further formed between the straight line portion 343a and the intersection portion 343b, The compressed air can be easily injected through the bubble spray holes 341a without vortex due to the arc-shaped guide portion 343c, thereby forming a bubble layer.

In the present embodiment, the arc guide 343c is applied by processing the arc between the straight section 343a and the cross section 343b into an arc, but by arranging a separate structure in this region and compressing it. It may be to guide the air, which should also fall within the scope of the present invention.

11 is a cross-sectional structural view of a variable pressure reducing module region in a ship according to a fourth embodiment of the present invention.

In the present embodiment, a plurality of compressed air flow lines 443 provided in the fluctuation pressure reducing module 440 are independently provided.

 In this case, the bubble jetting holes 441a may be provided by the number of the compressed air flow lines 443, and the efficiency or amount of bubbles can be increased through such a structure.

12 is a cross-sectional structural view of a variable pressure reducing module region in a ship according to a fifth embodiment of the present invention.

In the case of this embodiment, most of the structures are similar to those of the above-described first embodiment except that the porous cap 580 (cap) is further coupled to the bubble spraying hole 141a region.

As enlarged in FIG. 12, the porous cap 580 may be a disc shaped structure in which a plurality of through holes 581 are formed.

As such, when the porous cap 580 having the plurality of through holes 581 is applied, the compressed air passes through the plurality of through holes 581, and the air is faster and at the same time, the air is finely broken. Because of this, there is an advantage that can make a lot of finer bubbles.

The outer surface of the porous cap 580 may be provided with a detachable coupling portion 582 as a detachable coupling means to the variable pressure reduction module 140. In this embodiment, Lt; / RTI >

The porous cap 580 has a groove-shaped detachable coupling portion 582 formed on the outer surface thereof and a portion of the variable capping pressure reducing module 140 on which the porous cap 580 is provided is fitted into the detachable coupling portion 582 A protrusion (not shown) may be formed.

Of course, the opposite is also possible. That is, the outer surface of the porous cap 580 may have a protrusion shape, and the opposite pressure reducing module 140 may be formed with a groove to easily fit the porous cap 580.

In addition, the porous cap 580 may be screwed into the variable pressure reducing module 140.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Accordingly, such modifications or variations are intended to fall within the scope of the appended claims.

110: Hull 120: Propeller
130: Bulb rudder 140: Variable pressure reduction module
141: protrusion 142: module body
143: compressed air flow line 144: body flange
160: bottom plug 163: through part
164: seat jaw 170: compressed air supply unit
171: steering gear room 172: compressor
173: compressed air supply line 174a, 174b: valve

Claims (14)

A hull coupled to the rear of the propeller generating propulsion; And
It is coupled to the wall surface of the hull adjacent to the propeller and has a protrusion projecting from the outer surface of the hull, and when the operation of the propeller by generating bubbles to the outer surface of the hull through the bubble spray hole formed in the protrusion A ship comprising a variable pressure reduction module for preventing the generated fluctuation pressure is transmitted to the hull. The method of claim 1,
And a compressed air supply unit for supplying compressed air to the variable pressure reducing module. The method of claim 2,
Further comprising a bottom plug coupled to the wall of the hull,
The variable pressure reduction module is a vessel detachably coupled to the bottom plug. The method of claim 3,
The variable pressure reducing module includes:
A module body having a compressed air flow line through which the compressed air flows, and coupled to be inserted into a through part of the bottom plug, wherein the protrusion is formed at one side; And
And a body flange formed on the other side of the module body and disposed in a seat jaw of the bottom plug. 5. The method of claim 4,
The body flange and the bottom plug is a vessel in which a plurality of first and second communication holes are formed to communicate with each other to be fastened. 5. The method of claim 4,
The protrusion,
An inclined wall portion inclinedly connected to one side of the module body; And
And a vertical wall portion vertically disposed at a surface of the module body at an end of the inclined wall portion. 5. The method of claim 4,
The compressed air flow line,
A linear section having one end connected to the compressed air supply unit and extending along the longitudinal direction of the module body; And
And a crossing section disposed inside the protrusion, the crossing section crossing the straight line section and forming the bubble jetting hole at an end thereof. The method of claim 7, wherein
And an arc guide portion for guiding the compressed air is formed between the straight line portion and the crossing portion. 5. The method of claim 4,
Wherein the compressed air flow lines are independently arranged in multiple numbers. The method of claim 2,
The compressed air supply unit,
A compressor provided on one side of the hull; And
And a compressed air supply line directly connecting the compressor and the variable pressure reducing module. The method of claim 1,
The variable pressure reduction module is arranged in the bow direction with respect to the center axis of the propeller to generate bubbles in the stern direction. The method of claim 1,
Wherein the fluctuating pressure reducing module is disposed within a range that does not deviate from the diameter of the propeller with respect to the central axis of the propeller. The method of claim 1,
Ship further comprises a porous cap (cap) coupled to the bubble injection hole region. The method of claim 13,
A plurality of through holes are formed in the surface of the porous cap,
And the outer surface of the porous cap is further provided with a detachable coupling portion detachably coupled to the variable pressure reduction module.

Images