KR20160035883A - Anti-rolling apparatus - Google Patents

Abstract

Disclosed is an anti-rolling device. An anti-rolling device according to an embodiment of the present invention includes: a receiving groove unit formed in a hull; a bilge keel member which is retractable to be received in or projected out from the receiving groove unit; and a driving unit providing a driving force for the operation of the bilge keel member. The bilge keel member includes a first plate of which one side is joined to the hull around a first hinge shaft extended in a longitudinal direction of the hull and a second plate of which one side is hinge-joined to the other side of the first plate around a second hinge shaft extended in the longitudinal direction of the hull. One side of the driving unit is joined to the other side of the second plate around a third hinge shaft extended in the longitudinal direction of the hull. The other side of the driving unit is fixated to the hull. The driving unit pulls or pushes the third hinge shaft. The purpose of the present invention is to provide the anti-rolling device capable of effectively reducing a roll of the hull.

Description

[0001] Anti-rolling apparatus [0002]

The present invention relates to a lateral rocking reduction apparatus.

Floating marine structures such as floating production storage offloading (FPSO) and floating storage and regasification unit (FSRU) drill, produce, store and unload marine resources in the sea.

At this time, the floating ocean structure is inevitably exposed to the wave periodically, and the floating ocean structure rotates by the waves.

These transverse movements cause cargo leaks in cargo holds of floating offshore structures, which in turn cause damage to cargo holds and cargo.

In addition, if the natural period of the transverse fluctuation of the floating structure is coincident with the period of the wave acting on the floating structure (that is, the transverse wave), resonance occurs to increase the rolling angle, The upper refinery or equipment may be damaged.

Patent Document 10 - 02012-0138580 (December 26, 2012)

An embodiment of the present invention is intended to provide a rolling motion reduction apparatus that effectively reduces rolling motion of a hull.

According to an aspect of the present invention, there is provided a hull comprising: a receiving groove formed in a hull; A bill guiding member that is foldably operated to be received or protruded relative to the receiving groove; And a driver for providing a driving force for the operation of the billi chirp member, wherein the billiard member comprises: a first plate coupled to the hull about a first hinge axis extending in a longitudinal direction of the hull; And a second plate hingedly coupled to the other side of the first plate about a second hinge axis extending in the lengthwise direction of the hull, and the drive unit includes a third plate hinged to one side of the third plate extending in the longitudinal direction of the hull, A lateral rocking reduction device may be provided which is coupled to the other side of the second plate about the hinge axis, the other side is fixed to the hull, and the third hinge axis is pushed or pulled.

A plurality of grooves may be formed on the outer surfaces of the first plate and the second plate, respectively.

The billguer member may extend continuously or discontinuously along the longitudinal direction of the hull.

The rear end portion of the bill guiding member closest to the propeller has a structure for guiding the flow flowing into the propeller through the space between the first plate and the second plate to have a flow component opposite to the rotating direction of the propeller .

The rear end structure of the bill guiding member closest to the propeller may be formed such that a plate of the first plate and the second plate facing the direction of rotation of the propeller is shorter than the other plates.

Wherein the billguer member covers an inlet of the receiving groove portion when received in the receiving groove portion and at least a portion of the bill guiding member is formed so that an outline of a cross section of the hull member has a continuous curvature when the bill holding member is received in the receiving groove portion .

According to the embodiment of the present invention, since the bill guiding member is configured so as to be received or protruded from the receiving hopper formed on the hull by folding, when the rolling motion is not required to be reduced, the bill guiding member can be accommodated in the receiving groove It is possible to prevent the damage of the bill guards by the external impact and reduce the resistance by the bill guards when the hull is advanced.

In addition, a plurality of grooves are formed on the surface of the billguard member, thereby maximizing the rolling motion reduction performance.

In addition, the rear end portion of the bill guiding member closest to the propeller has a structure in which the flow introduced into the propeller through the space between the first plate and the second plate has a flow component opposite to the rotating direction of the propeller, Performance is improved.

FIG. 1 is a view illustrating a lateral vibration suppression apparatus according to an embodiment of the present invention,
FIG. 2 is a view showing a state in which the bill guard member of the lateral movement restraining apparatus according to the embodiment of the present invention is housed in the receiving groove,
FIG. 3 is a view showing a state in which a bilge-like member of a lateral vibration removing apparatus according to an embodiment of the present invention protrudes from a receiving groove,
FIG. 4 is a view showing a rear end structure of a bilge articulation member formed on the left side of a hull of a transverse vibration reducing apparatus according to an embodiment of the present invention,
5 is a view showing a rear end structure of a bilge articulation member formed on the starboard of a hull of a lateral vibration suppression apparatus according to an embodiment of the present invention,
6 is a view showing the rotation direction of the propeller viewed from the rear.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Referring to the accompanying drawings, the same or corresponding components are denoted by the same reference numerals, do.

2 is a view illustrating a state in which a bilge-rigid member of a lateral vibration suppression device according to an embodiment of the present invention is housed in a receiving groove, and FIG. FIG. 3 is a view showing a state in which a bilge-like member of a lateral movement reducing apparatus according to an embodiment of the present invention protrudes from a receiving groove.

1 to 3, the lateral vibration suppression apparatus 100 according to the present embodiment includes a receiving groove 110, a billiard member 120, and a driving unit 140.

The receiving groove 110 is formed on the side surface of the hull 10. The receiving groove 110 may be formed at a position where a conventional billguard is attached. For example, on the curved portion which meets the bottom of the side surface of the hull 10.

The billiard member 120 operates foldably so as to be received or protruded relative to the receiving groove 110. When the billguard member 120 is accommodated in the receiving groove 110, exposure to the outside is minimized to prevent damage to the billguard member 120 due to external impact, and when the hull 10 is advanced, The resistance generated by the member 120 can be minimized.

When the bill guard member 120 protrudes from the receiving groove 110, the bill guard member 120 functions as a conventional bilge lock. In this case, the bill shielding member 120 reduces rolling of the hull 10.

The bill guard member 120 includes a first plate 121 and a second plate 122. One side of the first plate 121 is coupled to the hull 10 about the first hinge axis 131 extending in the longitudinal direction of the hull 10. One side of the second plate 122 is coupled to the other side of the first plate 121 about the second hinge axis 132 extending in the longitudinal direction of the hull 10.

The billiard member 120 performs an operation of folding and unfolding while adjusting the angle between the first plate 121 and the second plate 122 about the second hinge axis 132. The bill holding member 120 is accommodated in the receiving groove 110 when it is extended about the second hinge shaft 132 and protrudes from the receiving groove 110 when folded.

The driving unit 140 provides a driving force for the folding operation of the billiard member 120. [ One side of the driving unit 140 is coupled to the other side of the second plate 122 about the third hinge shaft 133 extending in the longitudinal direction of the hull 10. The other side of the driving unit 140 is fixed to the hull 10. This driving unit 140 operates to push or pull the third hinge shaft 133.

In one example, the drive 140 may include, but is not limited to, a hydraulic or pneumatic cylinder that expands and contracts.

The driving unit 140 may be located inside the hull 10. In this case, a part of the driving unit 140 positioned inside the hull 10 penetrates the hull 10 and is coupled to the third hinge shaft 133. For example, when the driving unit 140 is in the form of a cylinder, the piston of the cylinder passes through the hull 10 and is coupled to the third hinge shaft 133. In this case, the penetration through the cylinder is watertight.

Alternatively, the driving portion 140 may be formed in the receiving groove 110.

A plurality of grooves 123 are formed on the outer surfaces of the first plate 121 and the second plate 122 constituting the billguard member 120, respectively. These grooves 123 maximize the rolling shake reduction performance when the billi chuck member 120 protrudes from the receiving groove 110 and functions as a bilge cheek.

The billguard member 120 may be continuously extended in the longitudinal direction of the hull 10 as shown in Fig. Or the billguard member 120 may extend discontinuously in the longitudinal direction of the hull 10 although not shown.

Meanwhile, the bill shield member 120 is composed of a first plate 121 and a second plate 122 having a flat plate shape as shown in FIG.

Alternatively, although not shown, the billguard member may have at least a portion of a curved shape. When the billguard member is received in the receiving groove 110, the billguard member covers the mouth of the receiving groove 110, and the bend portion of the billguard member can function as a part of the shell plate of the hull 10.

If the outline of the cross section of the hull 10 is formed to have a continuous curvature when the billguard member is received in the receiving groove 110, the resistance applied to the hull 10 can be effectively reduced.

FIG. 4 is a view illustrating a rear end structure of a bilge articulation member formed on a left side of a hull of a transverse vibration reducing apparatus according to an embodiment of the present invention. FIG. 5 is a cross- FIG. 6 is a view showing the rotation direction of the propeller viewed from the rear. FIG.

4 and 6, the rear end structure closest to the propeller 20 of the bill guerrillas member 120a formed on the left side of the hull 10 includes the first plate 121 and the second plate 122 ).

When the propeller 20 rotates clockwise as viewed from the rear, the first plate 121 of the billiard member 120a is rotated counterclockwise in the direction of rotation (clockwise) of the propeller 20 I'm headed.

A backward flow 50 is generated in a space between the first plate 121 and the second plate 122 while the first plate 121 and the second plate 122 are folded to reduce rolling motion. A portion of the flow 50 is short in length and is converted into a flow 51 which is diverted through an opening 126 at the rear end of the first plate 121.

The Z direction component of the flow 51 turned through the opening 126 thus has a negative value. In this case, the diverted flow 51 is directed downward. When the inflow flow is directed downward by the propeller 20 by the rear end structure of the bill shielding member 120a formed at the port side, the angle of attack is increased and the thrust of the propeller 20 is improved.

5 and 6, the rear end structure closest to the propeller 20 of the bill guerrillas member 120b formed on the starboard of the hull 10 is configured such that the second plate 122 is attached to the first plate 121 The length is shorter than that.

When the propeller 20 rotates clockwise as viewed from the rear, the second plate 122 of the billiard member 120b is rotated counterclockwise in the direction of rotation (clockwise) of the propeller 20 I'm headed.

At this time, a part of the flow 60 that is rearward in the space between the first plate 121 and the second plate 122 is short in length, and the direction is changed through the opening 127 formed at the rear end of the second plate 122 (61).

The Z direction component of the flow 61 that has been turned through the opening 127 thus has a positive value. I.e. the diverted flow 61 is directed upward. At this time, when the flow flowing into the propeller 20 is directed upward by the rear end structure of the billguer member 120b formed on the starboard, the angle of attack is increased and the thrust of the propeller 20 is improved.

The rear end of the bill guards 120a and 120b closest to the propeller 20 passes through the space between the first plate 121 and the second plate 122 and flows into the propeller 20 through the space between the propeller 20 and the propeller 20, And has a flow component in a direction opposite to the rotating direction of the rotor 20.

However, it is needless to say that the rear end structure of the bill shield member 120 is not limited to the shapes shown in FIGS. 4 and 5, but may have various shapes.

In the above-described horizontal motion reduction apparatus 100 according to the present embodiment, the billguard member 120 is configured to be received or protruded from the receiving hopper formed on the hull 10 in a foldable manner, The bill holding member 120 can be received in the receiving groove 110. [ In this case, damage to the bill shielding member 120 due to an external impact can be prevented, and resistance by the bill shielding member 120 can be reduced when the hull 10 advances.

In addition, a plurality of grooves 123 are formed on the surface of the billguer member 120, thereby maximizing the rolling motion reduction performance.

The rear end of the billiard member 120 closest to the propeller 20 flows through the space between the first plate 121 and the second plate 122 and flows into the propeller in the direction opposite to the rotating direction of the propeller The propelling performance of the propeller 20 is improved.

Meanwhile, the transverse vibration reduction apparatus 100 according to the present embodiment can be used not only for ships but also for floating ocean structures. At this time, the rear end structure of the billguard member described above is applied to a ship that generates thrust by a propeller.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, many modifications and changes may be made by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims. The present invention can be variously modified and changed by those skilled in the art, and it is also within the scope of the present invention.

10: Hull
20: Propeller
100: transverse vibration reducing device
110: receiving groove
120: Invisible member
121: first plate
122: second plate
123: Home
126, 127:
131: first hinge shaft
132: 2nd hinge shaft
133: Third hinge shaft
140:

Claims (6)

A receiving groove formed in the hull;
A bill guiding member that is foldably operated to be received or protruded relative to the receiving groove; And
And a driving unit for providing a driving force for the operation of the billiard member,
The bilge-
A first plate coupled to the hull on one side thereof about a first hinge axis extending in the longitudinal direction of the hull; And
And a second plate hinged to the other side of the first plate about a second hinge axis extending in the longitudinal direction of the hull,
The driving unit includes:
Wherein one side is coupled to the other side of the second plate about a third hinge axis extending in the longitudinal direction of the hull and the other side is fixed to the hull and the third hinge shaft is pushed or pulled. The method according to claim 1,
Wherein a plurality of grooves are formed on outer surfaces of the first plate and the second plate, respectively. The method according to claim 1,
The bilge-
And extends continuously or discontinuously along the longitudinal direction of the hull. The method according to claim 1,
The rear end of said billiest member, closest to the propeller,
Wherein the propeller has a structure in which a flow flowing into the propeller through a space between the first plate and the second plate has a flow component opposite to a rotating direction of the propeller. 5. The method of claim 4,
The rear end structure of the billiard member, closest to the propeller,
Wherein the plate of the first plate and the second plate facing the direction of rotation of the propeller is shorter than the plate of the other plate. The method according to claim 1,
The bilge-
And an inlet of the receiving groove portion is covered when the receiving groove portion is received in the receiving groove portion,
And at least a portion of the hull is formed such that the outline of the cross section of the hull has a continuous curvature when the bill guiding member is received in the receiving recess.

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