Ship

Abstract

A ship comprising: a hull with a central protrusion forward and left-right symmetry; a wind cover installed on the upper deck of the hull on the bow side, wherein the wind cover includes a rotating screen having a curved surface; and a shaft that rotatably fixes the rotating screen to the upper deck, wherein the rotating screen is positioned in a first state when the wind direction is less than a first reference angle and rotates around the shaft to be positioned in a second state when the wind direction is greater than the first reference angle, can respond to not only headwinds but also side winds, thereby obtaining a wind resistance reduction effect regardless of the wind direction.

Description

Technology Field

[0001] The present invention relates to a ship equipped with a wind cover capable of responding to side winds and tail winds. Background Technology

[0002] Generally, when a ship is sailing, it is subject to wind resistance caused by air and wind, in addition to resistance from water and waves. Wind resistance acts as a factor that worsens fuel efficiency, can reduce the ship's maximum speed, and degrades its maneuverability.

[0003] In particular, when cargo is loaded on the upper deck of a vessel such as a super-large container ship or cargo carrier, the rectangular shape makes it vulnerable to air resistance, and being exposed at a high position above the water surface poses a problem due to the large wind pressure area.

[0004] Container ships have a high fuel consumption rate due to wind resistance when operating, especially when there is a lot of cargo or tall structures on the upper deck, and a high fuel consumption rate due to air resistance compared to other ships because they always operate with containers loaded.

[0005] Conventional vessels can reduce wind resistance by installing a wind cover at the bow. However, while conventional wind covers can improve performance against headwinds, they present a problem where performance actually deteriorates compared to vessels without wind covers in the case of crosswinds or tailwinds. The problem to be solved

[0006] The present invention aims to provide a vessel equipped with a wind cover capable of responding not only to headwinds but also to sidewinds and tailwinds. means of solving the problem

[0007] The present invention provides a vessel comprising: a hull having a central protrusion forward and left-right symmetry; a wind cover installed on the upper deck of the hull on the bow side, wherein the wind cover includes a rotating screen having a curved surface; and a shaft that rotatably fixes the rotating screen to the upper deck, wherein the rotating screen is positioned in a first state when the wind direction is less than a first reference angle, and rotates around the shaft to be positioned in a second state when the wind direction is greater than or equal to the first reference angle.

[0008] The above-mentioned rotating screen can be symmetrically positioned on the left and right sides corresponding to the curve of the player in the above-mentioned first state.

[0009] The above pair of rotating screens can be positioned such that the angle difference in the second state is within 30°.

[0010] Of the above pair of rotating screens, only the rotating screen located in the direction from which the wind blows in the second state can rotate.

[0011] The above-mentioned rotating screen can be rotated so that the angle of attack with respect to the wind direction in the above-mentioned second state is 45° or less.

[0012] The above-mentioned rotating screen can maintain the angle of the rotating screen at the second reference angle when the wind direction is greater than or equal to the second reference angle.

[0013] The above first reference angle can have 90°.

[0014] The above-mentioned rotating screen may have thin ends and a protruding airfoil shape on the first and second surfaces.

[0015] The above-described rotating screen includes a main screen fixed to the shaft and a sub-screen coupled to the end of the main screen, and the angles of the main screen and the sub-screen may differ between the first state and the second state.

[0016] The above sub-screen and the above main screen are positioned in the first state corresponding to the bow shape of the hull, and in the second state may have a convex shape facing forward of the hull.

[0017] The above-described rotating screen includes a plurality of screens, and in the first state, they are arranged to be symmetrical with respect to the center of the width direction of the hull, and in the second state, they can be arranged so that the angle difference is within 30°.

[0018] The wind cover includes a fixed screen located at the center of the player, and the rotating screen may be positioned to extend along the shape of the player from both ends of the fixed screen in the first state.

[0019] It may further include a fixing device for fixing the above-mentioned rotating screen. Effects of the invention

[0020] A vessel according to at least one embodiment of the present invention can respond to not only headwinds but also sidewinds, thereby enabling a reduction in wind resistance regardless of wind direction.

[0021] The effects obtainable from the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description below. Brief explanation of the drawing

[0022] FIG. 1 is a perspective view illustrating a first state of a ship equipped with a wind cover according to one embodiment of the present invention. FIG. 2 is a perspective view illustrating a second state of a ship equipped with a wind cover according to one embodiment of the present invention. FIG. 3 is a drawing illustrating the shape of a wind screen according to the wind direction of a ship equipped with a wind cover according to one embodiment of the present invention. Figure 4 is a graph showing the effect of wind depending on whether a wind cover is provided according to the wind direction. FIG. 5 is a plan view illustrating a second state of a ship equipped with a wind cover according to another embodiment of the present invention. FIG. 6 is a perspective view illustrating a first state of a ship equipped with a wind cover according to another embodiment of the present invention. FIG. 7 is a perspective view illustrating a second state of a ship equipped with a wind cover according to another embodiment of the present invention. FIG. 8 is a perspective view illustrating a first state of a ship equipped with a wind cover according to another embodiment of the present invention. FIG. 9 is a perspective view illustrating a second state of a ship equipped with a wind cover according to another embodiment of the present invention. Specific details for implementing the invention

[0023] Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Identical or similar components regardless of drawing symbols will be assigned the same reference number, and redundant descriptions thereof will be omitted. The suffixes "module" and "part" used for components in the following description are assigned or used interchangeably solely for the ease of drafting the specification and do not inherently possess distinct meanings or roles. Furthermore, in describing embodiments disclosed in this specification, if it is determined that a detailed description of related prior art could obscure the essence of the embodiments disclosed in this specification, such detailed description will be omitted. Additionally, the attached drawings are intended only to facilitate understanding of the embodiments disclosed in this specification; the technical concept disclosed in this specification is not limited by the attached drawings, and it should be understood that they include all modifications, equivalents, and substitutions that fall within the spirit and technical scope of the present invention.

[0024] Terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but said components are not limited by said terms. These terms are used solely for the purpose of distinguishing one component from another.

[0025] When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. On the other hand, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between.

[0026] A singular expression includes a plural expression unless the context clearly indicates otherwise.

[0027] In this application, terms such as “comprising” or “having” are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0028] FIG. 1 is a perspective view illustrating a first state of a vessel (100) equipped with a wind cover (150) according to an embodiment of the present invention. An example of the vessel (100) of the present invention is a container ship that carries cargo, such as a container (10), on an upper deck. The container ship is vulnerable to wind resistance because the goods loaded on the upper side of the hull (110) have a rectangular shape.

[0029] Since the ship (100) sails forward, as shown in FIG. 1, the wind mostly blows toward the bow (111) from the front. To reduce not only this wind resistance but also seawater resistance, the ship (100) may have a streamlined bow (111) that protrudes sharply forward in the center and widens toward the rear.

[0030] If wind blowing from the front comes into direct contact with the front of a container loaded on the upper deck, a force opposite to the direction of propulsion is applied to the hull (110), which may reduce the operational efficiency of the vessel. In order to allow the wind blowing toward the front of the container (10) to flow laterally, the vessel (100) of the present invention may have a streamlined wind cover (150) attached to its bow.

[0031] As shown in FIG. 1, the wind cover (150) is arranged symmetrically on both sides corresponding to the streamlined shape of the bow (111), and wind moves along the curved surface of the wind cover (150) to the side of the hull (110), thereby reducing the decrease in navigation efficiency due to wind resistance.

[0032] However, when the speed of the hull (110) is low or the wind blows strongly from the side, the streamlined wind cover (150) corresponding to the bow shape as in FIG. 1 has no wind resistance reduction effect, or at a specific angle (about 90°, see FIG. 3), the effect actually decreases.

[0033] Accordingly, the wind cover (150) of the present invention may include a rotating screen (151) rotatably coupled to the hull (110) so that its shape can change according to the wind direction. The rotating screen (151) is rotatably coupled to the hull (110) via a shaft (152) and may include a pair in the left and right directions as shown in FIG. 1.

[0034] A state arranged in correspondence with the shape of the bow (111) as shown in Fig. 1 is called the first state. In the first state, one side of the rotating screen (151) facing the outer side, that is, the front of the hull (110), may have a curved surface that protrudes convexly like the shape of the bow (111).

[0035] FIG. 2 is a perspective view illustrating a second state of a ship (100) equipped with a wind cover (150) according to an embodiment of the present invention. The rotating screen (151) of the first state may have a significantly reduced wind resistance reduction effect for winds having a wind direction greater than a first reference angle. In particular, for winds blowing from a side direction of 90° or more, a wind cover (150) with a center protruding forward as in the first state actually reduces the efficiency of the ship (100).

[0036] Accordingly, when a wind greater than the first reference angle blows relative to the direction of travel of the hull (110), the rotating screen (151) can be rotated around the shaft (152) to switch to the second state as shown in FIG. 2.

[0037] FIG. 3 is a graph showing the effect of wind depending on whether a wind cover (150) is provided according to the wind direction, where the x-axis represents the wind direction and the y-axis represents the efficiency of the ship (100). The higher the efficiency (Cx), which is the value on the y-axis, the more advantageous it is in terms of energy saving.

[0038] In the range of headwind (wind direction less than 90°), having a wind cover (150) is more advantageous, but at 90°, it can be seen that efficiency is actually reduced when a wind cover (150) is present. Wind blowing from the side comes into contact with the wind cover (150) and actually reduces efficiency.

[0039] Accordingly, the present invention maintains a first state wind cover (150) in a shape that is symmetrical to the left and right and has a central part protruding forward, corresponding to the shape of the player (111) as shown in FIG. 1, in a frontal wind section, and when a side wind blows that reduces efficiency, the rotating screen (151) can be rotated to switch to a second state.

[0040] FIG. 4 is a drawing illustrating the shape of a wind screen according to the wind direction of a ship (100) equipped with a wind cover (150) according to one embodiment of the present invention.

[0041] The angle formed by the rotating screen (151) and the direction of the wind is called the angle of attack, and the rotating screen (151) can be rotated so that the angle of attack becomes 45° or less when switching to the second state.

[0042] When the angle of attack is greater than 45°, the wind flows along the curved surface of the rotating screen (151), and the magnitude of the force pushing in the vertical direction of the rotating screen (151) is greater than the effect of changing the direction of the wind, so the wind resistance reduction effect may be reduced.

[0043] Accordingly, the rotating screen (151) of the present invention can rotate from a first state and switch to a second state when the wind direction is greater than or equal to a first reference angle. In the second state, a pair of rotating screens (151a, 151b) may be arranged parallel to each other, or the angle difference between the pair of rotating screens (151a, 151b) may be within 30° within the range of an angle of attack of 45°.

[0044] In the second state, the other side of the rotating screen (151) also receives wind directly, so to reduce wind resistance, the rotating screen (151) can be configured in a streamlined shape where one side and the other side have the same curved surface.

[0045] In this embodiment, the first reference angle is 90° and can be adjusted within a range of about 80° to 100° depending on the shape of the ship (100) or the shape of the rotating screen (151). Since the wind direction refers to the wind direction relative to the hull rather than the actual wind direction, the wind direction may vary depending on the speed of the hull.

[0046] In the second state, the rotating screen (151) rotates so that the angle of attack has a value of 45° or less, and when the wind direction is 90°, the rotating screen (151) can be positioned in a shape tilted at an angle of 45° or less in the longitudinal direction of the hull (110). In order to face the wind blowing from the right side in the drawing, only the right rotating screen (151) rotates, and the left rotating screen (151) can be positioned to form the same angle as the right rotating screen (151).

[0047] In this embodiment, in a first state where the wind direction is 0° or more and less than 90°, a pair of rotating screens (151a, 151b) are arranged in a tilted shape symmetrically opposite to each other, so that when transitioning to a second state, only the right rotating screen (151b) rotates and the left rotating screen (151a) maintains the same state as in the first state.

[0048] When the wind direction changes to 90° or more, the rotating screen (151) can be rotated further to maintain the set angle of attack. Through the rotating screen (151) rotated to the second state, the propulsion of the vessel (100) can be further obtained by utilizing the force of the tail wind with a wind direction of 90° or more.

[0049] As shown in the graph of Fig. 3, it can be seen that the efficiency of the vessel (100) equipped with a wind cover (150) in a rotated second state is better than that of the vessel fixed in the first state at 120°.

[0050] However, since the pair of rotating screens (151a, 151b) are large in size, the radius of rotation is also large. Since it is difficult to secure space on the upper deck where the rotating screen (151) can rotate 360°, interference with other components on the upper part of the hull (110) becomes an issue.

[0051] When the wind direction is approximately 120°, the rotating screen (151) can rotate an additional 30° more than when the wind direction is 90° in order to maintain the set angle of attack. However, when the wind direction is 120° or more, interference with the configuration located on the upper deck or the container loaded on the upper deck may become an issue when the rotating screen (151) is rotated further to maintain the set angle of attack. Therefore, even if the wind direction becomes greater than 120°, the rotating screen (151) may not be rotated any further.

[0052] The angle at which the rotation of the rotating screen (151) stops is called the second reference angle, and in this embodiment, 120° is set as the second reference angle. At the second reference angle or higher, it no longer rotates, so the angle of attack can be 45° or higher.

[0053] Since the rotating screen (151) rotates, it may further include a fixing device (not shown) to maintain the angle of the rotating screen (151) to withstand wind resistance. It may be equipped with a fixing device that fixes in a first state and a fixing device that fixes the angle in 5° increments to fix in a second state.

[0054] FIG. 5 is a plan view illustrating a second state of a ship (100) equipped with a wind cover (150) according to another embodiment of the present invention. As shown in FIG. 5, the rotating screen (151) may be divided into two sections. It may include a main screen (1511) and a sub-screen (1512) connected to one end of the main screen (1511).

[0055] The main screen (1511) is connected to the hull (110) via a shaft (152), and the sub-screen (1512) is rotatably coupled to the end of the main screen (1511). When divided into the main screen (1511) and the sub-screen (1512), the rotation angle of the main screen (1511) and the sub-screen (1512) can be adjusted so that the rotating screen (151) can be maintained in a convex state toward the front as shown in FIG. 5.

[0056] That is, when the wind direction is greater than the first angle, the shaft (152) rotates to arrange the main screen (1511) and the sub screen (1512) as shown on the left side of FIG. 5, and then the angle between the sub screen (1512) and the main screen (1511) is changed so that the shape of the rotating screen (151) can be changed to a shape that protrudes forward as shown on the right side.

[0057] In the first state, when the wind direction is forward, wind can flow along the curved surface of the rotating screen (151), and in the second state, propulsion can be obtained by using the side wind by changing the angle between the main screen (1511) and the sub screen (1512).

[0058] FIG. 6 is a perspective view illustrating a first state of a ship (100) equipped with a wind cover (150) according to another embodiment of the present invention, and FIG. 7 is a perspective view illustrating a second state of a ship (100) equipped with a wind cover (150) according to another embodiment of the present invention.

[0059] The wind cover (150) of the present embodiment is characterized by using rotating screens (151c, 151d) that are smaller in size than the rotating screen (151) of the previously described embodiment, and having a greater number thereof. In the present embodiment, the wind cover (150) is constructed using four rotating screens (151).

[0060] Each of the multiple rotating screens (151) may have an airfoil shape. The sizes of the multiple rotating screens (151) may all be the same, or, as shown in FIG. 7, the sizes of each rotating screen (151c, 151d) may be different. In the rotating screen (151) of the present embodiment, the size of the first rotating screen (151) located in the center is smaller than the size of the second rotating screen (151) located at the rear, but is not limited thereto.

[0061] In the first state, as shown in FIG. 6, it is arranged to form a curve corresponding to the shape of the player (111) and is symmetrical. In order to be arranged corresponding to the curve of the player (111), the angles of the first rotating screen (151) and the second rotating screen (151) in the first state may be different.

[0062] As shown in FIG. 7, in the second state, the rotating screen (151) can rotate so that the angle of attack with the wind forms a predetermined angle. As previously mentioned, optimal efficiency is achieved when the angle of attack is about 45° or less, so when the wind direction is 90° or more, it can rotate so that it forms 45° or less with respect to the longitudinal direction of the hull (110).

[0063] The rotating screen (151) of this embodiment is smaller in size than the embodiment of FIG. 2 or FIG. 5 described above, so the radius of rotation is also smaller. Therefore, it is less affected by structures located on the upper deck, and can rotate further even when the wind direction is 120° or more.

[0064] The rotating screens (151c, 151d) of this embodiment can be driven independently, so that when the rotating screen (151c) located in the center is positioned along the shape of the bow (111) without rotating, it can block the green water flowing into the upper deck.

[0065] FIG. 8 is a perspective view illustrating a first state of a ship (100) equipped with a wind cover (150) according to another embodiment of the present invention, and FIG. 9 is a perspective view illustrating a second state of a ship (100) equipped with a wind cover (150) according to another embodiment of the present invention.

[0066] The wind cover (150) of the present embodiment may include a rotating screen (151) and a fixed screen. As it is necessary to block green water as described above, it may include a fixed screen (155) that is fixed to the hull (110) without rotating so as to block green water formed in at least a part of the bow (111).

[0067] In the drawing, a fixed screen (155) is positioned in the central part of the bow (111), and a rotating screen (151) can be arranged in a manner connected to both sides of the fixed screen (155). In the first state, the rotating screen (151) is arranged along the curved shape of the bow (111) together with the fixed screen (155), and can be switched to the second state when the wind direction changes to a side wind.

[0068] Although the effect of reducing wind resistance due to wind direction change may be reduced as the area of ​​the rotating screen (151) is reduced, the driving force required to rotate the rotating screen can be reduced as the size of the rotating screen (151) is reduced, and green water can also be shielded.

[0069] The fixed screen (155) may be positioned only at the center of the player (111) as shown in FIGS. 8 and 9, but may also be positioned at a certain height below the rotating screen (151) to further enhance the green water shielding effect.

[0070] The rotation of the rotating screen (151) can be controlled according to the wind direction in the same way as in the previously described embodiment.

[0071] A vessel (100) according to at least one embodiment of the present invention can respond to not only headwinds but also sidewinds, thereby enabling a reduction in wind resistance regardless of wind direction.

[0072] The foregoing detailed description should not be interpreted restrictively in all respects and should be considered exemplary. The scope of the invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the invention are included within the scope of the invention. Explanation of the symbols

[0073] 100: Ship 110: Hull 111: Player 150: Wind cover 151: Rotating screen 152: Shaft 1511: Main Screen 1512: Sub screen 155: Fixed screen

Claims

Claim 1 A ship comprising: a hull having a central protrusion forward and left-right symmetry; and a wind cover installed on the upper deck of the hull on the bow side, wherein the wind cover comprises a rotating screen rotatably coupled to the upper deck; and a shaft rotatably fixing the rotating screen to the upper deck, wherein the rotating screen is configured to be arranged in a shape corresponding to the curve of the bow to reduce wind resistance and is configured to rotate to be arranged in a shape different from the first state, thereby switching to one of two states. Claim 2 A ship according to claim 1, characterized in that the rotating screen comprises a pair symmetrically arranged on the left and right sides corresponding to the curve of the bow in the first state. Claim 3 A vessel according to paragraph 2, characterized in that the angle difference of the pair of rotating screens in the second state is within 30°. Claim 4 A vessel characterized in that, in paragraph 2, among the pair of rotating screens, only the rotating screen located in the direction from which the wind blows in the second state rotates. Claim 5 A vessel according to paragraph 2, characterized in that the rotating screen rotates such that the angle of attack with respect to the wind direction in the second state is 45° or less. Claim 6 A ship according to claim 1, characterized in that the rotating screen is positioned in the first state when the wind direction is less than the first reference angle, and is positioned in the second state when the wind direction is greater than or equal to the first reference angle. Claim 7 A vessel according to claim 6, characterized in that the rotating screen maintains the angle of the rotating screen at the second reference angle when the wind direction is greater than or equal to the second reference angle. Claim 8 A vessel characterized in that, in paragraph 6, the first reference angle is 90°. Claim 9 A ship according to claim 1, wherein the rotating screen comprises a main screen coupled to the upper deck via a shaft and a sub-screen coupled to the end of the main screen, and wherein the angles of the main screen and the sub-screen are different in the first state and the second state. Claim 10 A ship according to claim 9, characterized in that the sub-screen and the main screen are positioned in the first state corresponding to the bow shape of the hull, and in the second state have a convex shape toward the front of the hull. Claim 11 A ship according to claim 1, wherein the rotating screen comprises a plurality of such screens, and in the first state, is arranged to be symmetrical with respect to the center of the width direction of the hull, and in the second state, is arranged such that the angle difference is within 30°. Claim 12 A vessel according to claim 1, characterized in that the wind cover further includes a fixed screen located at the center of the bow. Claim 13 A ship according to claim 12, characterized in that the rotating screen is positioned to extend along the shape of the bow at both ends of the fixed screen in the first state. Claim 14 A vessel characterized in that, in paragraph 12, the fixed screen is positioned at a predetermined height below the rotating screen to shield seawater flowing into the upper deck. Claim 15 A ship according to claim 1, wherein the rotating screen is characterized by having both ends having a thin thickness and a first surface and a second surface having a protruding airfoil shape. Claim 16 A vessel characterized by further including a fixing device for fixing the rotating screen in paragraph 1.

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