KR20140060668A - Resistance reduction system of offshore - Google Patents

Abstract

Disclosed is a resistance reduction system of a maritime structure. The resistance reduction system of a maritime structure has a housing space formed on the inside wall of a hull inside a moon pool and has an angle adjusting structure installed inside the housing space and capable of being drawn toward the moon pool. The side wall of the hull has a rotation angle adjusting unit of the angle adjusting structure, to adjust the angle of the angle adjusting structure around a central axis. Inside the hull, a drawing instrument for drawing the angle adjusting structure from the housing space, and an insertion instrument for inserting the angle adjusting structure back into the housing space, are installed.

Description

[0001] Resistance Reduction System of Offshore [

The present invention relates to a resistance reducing system for an offshore structure, and more particularly, to an increase in resistance due to a flow in a doorway formed on a ship or an offshore structure. The wedge- The present invention relates to a system for reducing the resistance of an offshore structure.

As the international phenomenon of industrialization and industry develops, the use of earth resources such as petroleum is gradually increasing, and thus the stable production and supply of crude oil is becoming a very important issue on a global scale.

For these reasons, recently marginal field or deep-sea oil field development has become economically feasible, which has been neglected due to economic difficulties so far. Therefore, along with the development of submarine mining technology, A drill rig has been developed.

Conventional submarine drilling can be carried out only by other tugboats, and rig ships or fixed flat grooves dedicated to deep sea drilling which are used for submarine drilling under anchorage at one point of the sea using a mooring device are mainly used .

In recent years, however, a so-called drill ship, which is manufactured in the same form as a general ship, has been developed and installed in underwater drilling so that it can be equipped with advanced drilling equipment and can navigate by its own power.

In order to develop small-scale oilfields, these drillships are designed to be able to navigate powerlessly without a tugboat, depending on the working conditions that need to be moved frequently.

Therefore, for drill ships designed to navigate with their own power, they must be dried to have optimal navigational performance. At the center of the hull of the drill ship, a large moon-pool is formed to send the drill pipe down to the sea floor.

It is an indispensable structure in terms of the application of the drill ship, but it is very disadvantageous in terms of marine vessel stability and navigation stability.

Particularly, in the conventional drill ship, due to the sloshing phenomenon caused by the flow relative to the sea water flowing into the interior of the drum and the sea water outside the hull, Increased resistance, reduced speed, increased horsepower, increased fuel consumption, damage to the hull can occur.

In addition, the conventional drill ship can cause safety and operational efficiency of the operator to be deteriorated due to overflowing of the ship due to the flow of the fluid inside the drum.

A pair of plates for covering a part of the inside of the interior of the interior of the interior of the interior of the interior of the interior of the interior of the interior of the interior of the interior of the interior of the interior of the interior of the interior of the interior of the interior of the interior of the interior of the exterior Each of which is provided in accordance with the ship's operating waterline and is extended along the operating waterline to cover part of the interior of the watercraft during the operation of the ship, and when the ship is stopped, the buoyancy of the ship, Aft and stern side wall surfaces to open the interior of the interior.

However, the conventional door attachment has a problem that the rotation of the plate is not smooth and the plate is exposed to the side of the door so that the resistance of the ship is reduced.

[Prior Art]

[Patent Literature]

Patent No. 10-0963171, entitled " Buoyancy < RTI ID = 0.0 >

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems and provides a resistance reducing system for an offshore structure capable of minimizing an increase in resistance caused by a flow generated in front of a doorpath by adjusting the angle of a wedge- It has its purpose.

It is also an object of the present invention to provide a resistance reduction system of an offshore structure which enables storage of the wedge-shaped structure so as not to affect the operation in the operation area.

In order to achieve the above object, a resistance reduction system of an offshore structure according to the present invention includes a housing space formed on an inner wall surface of a hull, an angle adjusting structure capable of being drawn out to the door pool, And an angle adjusting structure rotation angle adjusting unit is installed on the sidewall of the hull so that the angle adjusting structure can be angularly adjusted around the rotation axis. The hull includes draw-out means for drawing the angle adjusting structure out of the containment space, A drawing means for drawing the angle adjusting structure into the containing space is provided.

And adjust the rotation angle of the angle adjusting structure about the rotation axis according to the hull speed.

The angle adjusting structure is preferably formed in a wedge shape.

The hull is formed with a guide slot for guiding in / out of the angle adjusting structure.

Both ends of the rotation axis of the angle adjusting structure are inserted into the guide slots.

Wherein the angle adjusting structure rotation angle adjusting unit includes a driving gear that is engaged with a driven gear coupled to both ends of the rotating shaft, a power transmitting unit that transmits power of the rotating motor that generates power to the driving gear, As shown in FIG.

The drawing means is a plurality of drawing rollers installed in the receiving space to draw out the angle adjusting structure, and the drawing means comprises a wire connected to the angle adjusting structure and a winder pulling the wire.

The drawing means and the drawing means may be hydraulic cylinders.

As described above, the present invention minimizes the resistance increase due to the door openings, thereby reducing fuel consumption, shortening the time required for the operation area, There is an effect not to give.

1 is a perspective view of a hull with a resistance reduction system of an offshore structure according to a first embodiment of the present invention;
2 is a perspective view showing the inside of a resistance reduction system of an offshore structure according to a first embodiment of the present invention;
3 is a perspective view showing the outside of the resistance reduction system of an offshore structure according to the first embodiment of the present invention.
4 is an exploded perspective view showing the angle adjusting structure rotation angle adjusting unit according to the first embodiment of the present invention.
5 is a side view showing a resistance reduction system of an offshore structure according to a first embodiment of the present invention;
Figure 6 shows a flow flow
7 is a perspective view of a hull with a resistance reduction system of an offshore structure according to a second embodiment of the present invention.
8 is a perspective view showing the inside of the resistance reduction system of an offshore structure according to the second embodiment of the present invention.
9 is a perspective view showing the outside of the resistance reduction system of an offshore structure according to the second embodiment of the present invention.
10 is a side view showing a resistance reduction system of an offshore structure according to a second embodiment of the present invention
11 is a view showing the flow flow

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a resistance reduction system of an offshore structure according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a perspective view showing the inside of a resistance reduction system of an offshore structure according to the first embodiment of the present invention, and FIG. 3 is a perspective view of the inside of the resistance reduction system of the offshore structure according to the first embodiment of the present invention. FIG. 4 is an exploded perspective view showing an angle adjusting structure rotation angle adjusting unit according to the first embodiment of the present invention, FIG. 5 is a perspective view of the present invention FIG. 6 is a side view showing a resistance reduction system of an offshore structure according to a first embodiment of the present invention. FIG.

Referring to the drawings, a resistance reduction system of an offshore structure according to a first embodiment of the present invention is characterized in that a containment space 110 is formed in an inner wall surface 11 of a hull 10 inside a door frame 1, (110) is provided with an angle adjusting structure (120) which can be drawn out to the side of the door (1). The angle regulating structure 120 preferably has a wedge shape.

An angle adjusting structure rotation angle adjusting unit 130 is installed on the sidewall 12 of the hull 10 so that the angle adjusting structure 120 can be angularly adjusted around the rotation axis 121.

The angle adjusting structure rotation angle adjusting unit 130 is configured to rotate the power of the driving gear 131 engaged with the driven gear 121a coupled to both ends of the rotating shaft 121 and the rotating motor 132 generating the power, A power transmitting portion 133 for transmitting the driving force to the driving gear 131 and a control portion 134 for controlling the rotation of the rotating motor 132. [

The control unit 134 may be a system that can calculate the angle of the angle adjusting structure 120 in advance according to the speed of the ship 10 (through model testing or CFD analysis) and can command an angle according to the advancing speed, .

A drawing means 140 for drawing the angle adjusting structure 120 from the storage space 110 and a drawing means 140 for drawing the angle adjusting structure 120 into the storage space 110 are formed in the hull 10, 150 are installed.

The rotation angle of the angle regulating structure 120 is adjusted around the rotation axis 121 according to the speed of the hull 10. When the speed of the hull 10 is large, The rotation angle of the hull 10 is made steep and the rotation angle of the angle adjusting structure 120 is kept steep when the speed of the hull 10 is small.

The side wall 12 of the hull 10 is formed with a guide slot S for guiding in / out of the angle adjusting structure 120. Both ends of the rotation shaft 121 of the angle adjusting structure 120 are inserted into the guide slot S and guided.

The drawing means 140 includes a plurality of drawing rollers installed in the receiving space 110 to draw the angle adjusting structure 120. Although not shown in the figure, the drawing roller is driven by a motor.

The lead-in unit 150 may include a wire 151 connected to the angle adjusting structure, and a winder 152 pulling the wire 151.

The operation of the resistance reducing system of an offshore structure according to the first embodiment of the present invention will now be described.

First, when the motor of the drawing roller is driven to rotate the drawing roller in a state where the angle adjusting structure 120 is stored in the holding space 110, the angle adjusting structure 120 is taken out of the storing space 110. [

At this time, the angle adjusting structure 120 maintains the state where the end of the rotation shaft 121 is inserted into the guide slot S. Therefore, the drawing of the angle adjusting structure 120 is guided by the guide slot S.

When the angle adjusting structure 120 is completely drawn, the driven gear 121a of the rotating shaft 121 is engaged with the driving gear 131. [

The rotating force of the rotating motor 132 may be transmitted to the rotating shaft 121 through the power transmitting portion 133 and adjusted to the rotating angle of the angle adjusting structure 120. [ The controller 134 controls the rotational force of the rotating motor 132.

When the winder 152 of the guiding means 150 is operated to pull the wire 151 when the angle adjusting structure 120 is to be stored in the storage space 110, (120) is guided by the guide slot (S) and is stored in the containment space (110).

6A shows resistance generated when the angle adjusting structure 120 hits the rear face of the door frame according to the angle of rotation of the angle adjusting structure 120. It is confirmed that the resistance generated when the angle adjusting structure 120 hits the back face of the door frame decreases .

FIG. 6 (b) shows the flow along the line speed, and it can be seen that when the hull velocity is large, the resistance caused by colliding with the rear face of the door frame decreases.

FIG. 7 is a perspective view of a hull equipped with a resistance reduction system of an offshore structure according to a second embodiment of the present invention. FIG. 8 is a perspective view showing the inside of a resistance reduction system of an offshore structure according to a second embodiment of the present invention, 10 is a side view showing a resistance reducing system of an offshore structure according to a second embodiment of the present invention, and FIG. 11 is a side view Fig.

Referring to the drawings, in the resistance reduction system of an offshore structure according to the second embodiment of the present invention, a containment space 210 is formed in the inner wall surface 11 of the hull 10 inside the door frame 1, An angle adjusting structure 220 which can be drawn out to the side of the door frame 1 is installed in the door 210. The angle regulating structure 220 preferably has a wedge shape.

An angle adjusting structure rotation angle adjusting unit 230 is installed on the sidewall 12 of the hull 10 so that the angle adjusting structure 220 can be angularly adjusted around the rotation axis 221.

The angular adjustment structure rotation angle adjusting unit 230 adjusts the power of the drive gear 231 engaged with the driven gear 221a coupled to both ends of the rotation shaft 221 and the rotation motor 232 generating the power, A power transmission portion 233 for transmitting the driving force to the driving gear 231 and a control portion 234 for controlling the rotation of the rotation motor 232. [

The control unit 234 may be a system that can calculate the angle of the angle adjusting structure 220 in advance according to the speed of the ship 10 (through model testing or CFD analysis) and can command an angle according to the advancing speed, .

The hull 10 is provided with a take-out and take-out means 240 for taking out the angle-regulating structure 220 from the containment space 110. Here, the drawing-out means 140 may be constituted by a hydraulic cylinder.

And adjust the rotation angle of the angle adjusting structure 220 about the rotation axis 221 according to the speed of the hull 10.

A guide slot S is formed in the sidewall 12 of the hull 10 to guide the inlet / outlet of the angle regulating structure 220. Both ends of the rotation shaft 221 of the angle adjusting structure 220 are inserted into the guide slot S and guided.

The operation of the resistance reduction system of an offshore structure according to the second embodiment of the present invention will now be described.

First, when the angle control structure 120 is stored in the storage space 110 and the hydraulic cylinder, which is the input / output means 240, is driven to push the angle control structure 120, (Not shown).

At this time, the angle adjusting structure 120 maintains the state where the end of the rotation shaft 121 is inserted into the guide slot S. Therefore, the drawing of the angle adjusting structure 120 is guided by the guide slot S. When the drawing of the angle adjusting structure 120 is completed, the driven gear 221a of the rotating shaft 221 is engaged with the driving gear 231. [

In this state, the rotational force of the rotating motor 232 is transmitted to the rotating shaft 221 through the power transmitting portion 233 and can be adjusted to the rotating angle of the angle adjusting structure 220. The control unit 234 controls the rotational force of the rotation motor 232.

When the angle regulating structure 220 is to be stored in the storage space 210, the hydraulic cylinder 240 operates to store the angle regulating structure 120 in the storage space 110.

11 (a) is a view showing a resistance caused by a collision against the rear surface of the door frame 1 according to the angle of rotation of the angle adjusting structure 220, It can be confirmed that the resistance decreases.

11 (b) shows the flow along the line speed. When the rotation angle of the angle adjusting structure 220 is fixed, when the speed of the hull 1 is large, Can be confirmed.

As described above, the present invention minimizes the resistance increase due to the door openings, thereby reducing fuel consumption, shortening the time required for the operation area, There is an effect not to give.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Various modifications and variations are possible within an even range.

1:
10: Hull
11: My wall
110: Storage space
120: Angular adjustment structure
121:
121a: driven gear
130: Angle adjustment structure rotation angle adjustment unit
131: drive gear
132: Rotary motor
133: Power transmission unit
134:
140:
150: incoming means

Claims (10)

A housing space is formed in the inner wall of the hull, and an angle adjusting structure capable of being drawn out to the door pool is installed in the housing space. The angle adjusting structure is angularly adjusted around the rotary shaft on the hull side wall Wherein the angle adjustment structure rotation angle adjusting unit is installed in the hull and includes a drawing means for drawing the angle adjusting structure out of the holding space and a drawing means for drawing the angle adjusting structure into the holding space. The resistance reduction system of offshore structures. The method according to claim 1,
Wherein the angle adjusting structure is configured to adjust the angle of rotation of the angle adjusting structure about the rotation axis according to the speed of the ship. The method according to claim 1,
Wherein the angle adjusting structure is a wedge shape. The method according to claim 1,
Wherein the hull is formed with a guide slot for guiding in / out of the angle adjusting structure. The method according to claim 1,
Wherein both ends of the rotation axis of the angle adjusting structure are inserted into the guide slots. The method according to claim 1,
Wherein the angle adjusting structure rotation angle adjusting unit comprises:
A driving gear engaged with a driven gear coupled to both ends of the rotating shaft;
A power transmitting portion for transmitting power of a rotating motor for generating power to the driving gear; And
And a control unit for controlling the rotation of the rotary motor. The method according to claim 1,
The drawing means
A plurality of drawing rollers installed in the storage space for drawing the angle adjusting structure,
The inlet means
A wire connected to the angle adjusting structure, and a winder pulling the wire. The method according to claim 1,
Wherein the drawing means and the drawing means are hydraulic cylinders. The method according to claim 1,
Wherein the resistance generated when the inclination of the angle adjusting structure is abruptly collided against the rear surface of the door frame is decreased and the resistance caused by colliding with the rear surface of the door frame is reduced when the hull speed is high. A housing space is formed in an inner wall of the hull, and an angle adjusting structure capable of being drawn out to the door pool is provided in the housing space, and the angle adjusting structure is formed on the side wall of the hull, Wherein a control structure rotation angle adjusting unit is installed.

Images