KR101927547B1

KR101927547B1 - Propulsion improving apparatus of ship

Info

Publication number: KR101927547B1
Application number: KR1020130087307A
Authority: KR
Inventors: 안유원; 이강훈; 한명륜; 이창열
Original assignee: 현대중공업 주식회사
Priority date: 2013-07-24
Filing date: 2013-07-24
Publication date: 2018-12-11
Also published as: KR20150013962A

Abstract

A ship propulsion improvement apparatus according to an embodiment of the present invention includes an asymmetric duct installed in front of a propeller of a ship to guide a flow of a fluid and a duct disposed in the duct to adjust a flow direction of a fluid flowing into the duct, Pin.

Description

{PROPULSION IMPROVING APPARATUS OF SHIP}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a ship propulsion improvement apparatus, and more particularly, to a ship propulsion improvement apparatus capable of improving a propulsion performance of a ship by influencing a flow of a fluid flowing into a propeller through a duct having an asymmetric structure .

In general, a duct is installed at the stern of the hull to improve propulsion of the ship. The duct has a columnar shape with a hollow portion in the longitudinal direction and has an airfoil cross section having a predetermined angle of attack with respect to the flow from the front toward the duct.

Conventional ducts are formed to have, for example, an airfoil cross section having the same shape in the circumferential direction when formed in a cylindrical shape. In this case, the duct generally has an airfoil section whose pressure surface faces outward and whose suction surface faces inward.

In the case of a duct having such a shape, thrust is generated in the upper region of the duct by the flow introduced into the duct.

However, in the lower region of the duct, excessive detent causes flow separation, resulting in a lower area of the duct as a resistance. This resistance reduces the propulsion efficiency of the ship by damping the thrust generated in the upper region of the duct.

A prior art related to the present invention is Korean Patent Laid-Open Publication No. 10-2012-0065029 (published on June 20, 2012), which discloses a 'circular duct support structure for a ship'.

The present invention provides a ship propulsion improvement apparatus capable of improving a propulsion performance of a ship by influencing a flow of a fluid flowing into a propeller through a duct having an asymmetric structure.

A ship propulsion improvement apparatus according to an embodiment of the present invention includes an asymmetric duct installed at a front of a propeller of a ship to guide a flow of a fluid and a duct disposed in the duct to adjust a flow direction of a fluid flowing into the duct Includes duct pins.

The duct includes a first flow path portion having an annular body and provided at a port or a starboard port through the hollow of the duct, a second flow path portion provided at the opposite side of the first flow path portion, 2 < / RTI >

The duct fin includes a vertical duct pin which is arranged to cross the interface between the first flow path portion and the second flow path portion.

The duct pin may include a horizontal duct pin that defines an inner space of the second flow path portion.

The pitch angle of the duct pin varies with the set angle.

The duct is spaced upward from the central axis of the propeller.

According to the ship propulsion improvement apparatus of the present invention, the flow of the fluid flowing into the propeller through the duct having the asymmetric structure is influenced, and the propulsion performance of the ship can be improved.

FIG. 1 and FIG. 2 are views showing a simplified flow direction of a ship operated using a conventional ship propulsion device and a fluid flowing through the ship.
3 is a side view schematically showing a ship equipped with a ship propulsion improvement apparatus according to an embodiment of the present invention;
FIG. 4 is a side view schematically showing an installation of a ship propulsion improvement apparatus according to an embodiment of the present invention; FIG.
FIG. 5 is a rear view illustrating a ship propulsion improvement apparatus according to an embodiment of the present invention. FIG.
FIG. 6 is a perspective view schematically showing a ship propulsion improvement apparatus according to an embodiment of the present invention; FIG.
7 is a perspective view schematically showing a ship propulsion improvement apparatus according to another embodiment of the present invention.
FIG. 8 and FIG. 9 are views showing a simplified flow direction of a ship operating with a ship propulsion improvement apparatus according to an embodiment of the present invention and a fluid flowing through the ship.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which: It is intended that the invention be described in its entirety by reference to the appended claims and their equivalents.

In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

FIG. 1 and FIG. 2 are schematic views showing a flow direction of a ship and a fluid flowing through the ship using a conventional ship propulsion device.

Referring to FIGS. 1 and 2 together, a ship 1 using a conventional ship propulsion device 10 is operated. In this case, the conventional ship propulsion device 10 shown in FIGS. 1 and 2 has a duct-free structure.

When the ship 1 is traveling along the traveling direction, the fluid flows in the stern direction according to the flow direction of the hull, and flows into the propeller.

At this time, as shown in FIG. 2, the fluid introduced into the rotating propeller does not flow in the linear direction by the propeller but flows in the direction of the twisted curve, so that the propulsion force of the ship 1 can be lowered.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, a ship propulsion improvement apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings.

3 and 4 are side views schematically showing a ship equipped with a ship propulsion improvement apparatus according to an embodiment of the present invention, and FIG. 5 is a perspective view illustrating a ship propulsion improvement apparatus according to an embodiment of the present invention, Fig.

3 to 5, a ship propulsion improvement apparatus 100 according to an embodiment of the present invention includes a duct 110 and a duct pin 120.

The duct 110 is installed in front of the ship propeller 101 to guide the flow of the fluid and has an asymmetrical shape.

Referring to FIG. 5, the duct 110 is spaced upward from the central axis 102 of the propeller 101.

That is, the center axis 111 of the duct 110 may have a step d spaced upward from a position on the same line as the central axis 102 of the propeller 101.

This is to allow the fluid flowing along the hull to be sucked into the duct 110 during the operation of the ship, and then the introduced fluid can be easily sucked into the propeller 101.

Since the step d between the center axis 111 of the duct 110 and the center axis 102 of the propeller 101 shown in FIG. 5 is exaggerated for convenience of explanation, Need not be limited.

The duct 110 consists of an annular body with a hollow, as shown. At this time, the duct 110 is installed in front of the propeller 101 and has an asymmetric shape to guide the flow of the fluid.

The duct 110 includes a first flow path portion 112 provided in the port or starboard through the hollow and a second flow path portion 113 provided on the opposite side of the first flow path portion 112.

The first flow path portion 112 has a quadrangular shape. The second flow path portion 113 has a larger flow area than the first flow path portion 112.

The first flow path portion 112 and the second flow path portion 113 may be installed on the ship 1 in a state where the first flow path portion 112 and the second flow path portion 113 are mutually displaced according to the driving direction of the propeller 101 or the drying condition of the ship.

The duct pin 120 is provided in the duct 110 to adjust the flow direction of the fluid introduced into the duct 110.

The duct pin 120 may include a vertical duct pin 121 that extends across an interface between the first flow path portion 112 and the second flow path portion 113.

The duct pin 120 may include a horizontal duct pin 122 that defines an inner space of the second flow path portion 113.

FIG. 6 is a perspective view briefly showing a ship propulsion improvement apparatus according to an embodiment of the present invention, and FIG. 7 is a perspective view briefly showing a ship propulsion improvement apparatus according to another embodiment of the present invention.

Referring to FIG. 6, a ship propulsion improvement apparatus 100 according to an embodiment of the present invention includes a duct 110 and a duct pin 120.

Since the above-described configurations are described above with reference to FIGS. 2 to 5, duplicate descriptions will be omitted. However, the above-described contents may be partially overlapped to help understand the drawings.

The duct 110 is installed in front of the ship propeller, guides the flow of the fluid, and has an asymmetrical shape. At this time, the duct 110 has an annular body and includes a first flow path portion 112 and a second flow path portion 113.

The duct fin (120) is provided in the duct (110) to adjust the flow direction of the fluid flowing into the duct (110).

The duct pin 120 includes a vertical duct pin 121 for partitioning the boundary between the first and second flow paths 112 and 113 and a horizontal duct pin for dividing an inner space of the second flow path 113 122 may be provided.

The vertical duct pin 121 and the horizontal duct pin 122 may have a pitch angle of 3 to 10.

7, another embodiment of the duct pin 120 is shown in the marine propulsion improvement apparatus 100. As shown in FIG.

The ship propulsion improving apparatus 100 according to another embodiment of the present invention is configured such that the pitch angle of the duct pin 120 is varied at a predetermined angle.

At this time, the set angle is 3 to 10 degrees, and the vertical duct pin 121 and the horizontal duct pin 122 can be changed by the controller 130 at the set angle.

Since the vertical duct pin 121 and the horizontal duct pin 122 have different positions from each other, the pitch angle may be individually varied by the controller 130.

When the pitch angle of the duct pin 120 is less than 3 degrees or more than 10 degrees, when the fluid flowing into the duct 110 flows forward of the propeller, flow separation or resistance is excessively generated, It may not help to improve propulsion.

Therefore, it is preferable that the pitch angle of the duct pin 121 is 3 to 10 degrees, and the pitch angle can be varied within the range according to the control of the controller 130.

FIG. 8 and FIG. 9 are schematic views illustrating a direction of flow of a ship and a fluid flowing through the ship using the ship propulsion improvement apparatus according to an embodiment of the present invention.

Referring to FIGS. 8 and 9, the ship 1 is operated using the ship propulsion improvement apparatus 100 according to an embodiment of the present invention. 8 and 9, a duct 110 having an annular body is installed in front of the propeller 101. [

When the ship 1 is traveling along the traveling direction, the fluid flows in the stern direction along the flow direction of the hull and flows into the propeller 101.

As shown in FIG. 9, the fluid flowing into the rotating propeller 101 is divided into a duct 110 having an asymmetric shape and a duct pin 120 provided inside the duct 110, 101).

Thus, the fluid introduced into the propeller 101 is rectified to the rear, thereby improving the propulsive performance of the ship 1.

As described above, the ship propulsion improvement apparatus of the present invention can improve the propulsion performance of the ship by influencing the flow of the fluid flowing into the propeller through the duct having the asymmetric structure.

As described above, the ship propulsion improvement apparatus according to one embodiment of the present invention has been described.

It is to be understood that the terminology or words used in the foregoing detailed description and in the following claims should not be construed as limited to ordinary or dictionary meanings and the inventor shall not be construed to limit the concept of the term to the best of his / Should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be properly defined.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory only and are not restrictive of the invention, It should be understood that water and variations may be present.

1: Ships
10: Conventional ship propulsion device
100: Ship propulsion improvement device
101: Propeller
102: Propeller center axis
110: duct
111: Duct center axis
112:
113:
120: Duct pin
121: Vertical duct pin
122: Horizontal duct pin
130: controller

Claims

An asymmetric duct installed in front of the ship propeller for guiding the flow of the fluid,
And a duct pin provided in the duct to adjust the flow direction of the fluid introduced into the duct,
In the duct,
Wherein the center axis is spaced apart from the central axis of the propeller so as to be spaced apart from the center axis of the propeller, and the asymmetric portion protruding from the semicircular portion on the upper side and the port side or the starboard on the lower side with respect to the central axis.

The method according to claim 1,
In the duct,
Having an annular body,
A first flow path portion provided at a port or a starboard port through the hollow of the duct,
And a second flow path portion provided on the opposite side of the first flow path portion and having a flow area larger than that of the first flow path portion.

3. The method of claim 2,
The duct pin
And a vertical duct pin that extends across an interface between the first flow path portion and the second flow path portion.

3. The method of claim 2,
The duct pin
And a horizontal duct pin for partitioning an inner space of the second flow path portion.

The method according to claim 1,
The duct pin
A ship propulsion improvement device in which the pitch angle changes at a set angle.

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