Foldable enclosure device for ship air layer drag reduction system and air layer drag reduction ship

Abstract

The present invention discloses a foldable enclosure device for a ship air layer drag reduction system, which is installed on the flat bottom of an air layer drag reduction ship, and the top of the flat bottom is a ship bottom cabin, including a plurality of air pocket enclosures and a plurality of drive structures. Each air pocket enclosure is rotatably connected to the lower surface of the ship flat bottom. After each air pocket enclosure is rotated and unfolded, it cooperates to enclose an air pocket for accommodating the air layer of the air layer drag reduction ship. Each air pocket enclosure is respectively equipped with one or more drive structures, and the drive structure includes a drive member and a transmission member. The drive member is arranged in the ship bottom cabin, one end of the transmission member is connected to the drive member, and the other end passes through the ship flat bottom and is connected to the air pocket enclosure, and a sealing structure is arranged between the transmission member and the ship flat bottom; the drive member drives the air pocket enclosure to rotate relative to the ship flat bottom through the transmission member, so as to realize the unfolding or folding of the air pocket enclosure. According to the present invention, the ship flat bottom only needs to be cut and processed where the transmission member passes, so the modification of the ship bottom is relatively small.

Description

Technical Field

[0001] The present invention belongs to the technical field of ship bottom air layer drag reduction system, and in particular relates to a foldable enclosure device for ship bottom air layer drag reduction system and an air layer drag reduction ship. Background Art

[0002] Air layer drag reduction is a technology that reduces the friction resistance of a sailing ship by jetting air to the bottom of the ship to form an air layer covering the bottom of the ship to reduce the wet surface area of ​​the hull. The jet system currently used is the ship bottom groove and longitudinal coaming. The longitudinal coaming form has a high degree of acceptance due to the small changes to the hull, but it has an impact on the draft of the ship (when sailing in shallow water channels), and in the non-jet state, the additional resistance of the hull increases after the longitudinal coaming is installed on the bottom of the ship.

[0003] In the prior art, the enclosure device of the ship's air layer drag reduction system generally adopts a telescopic form, and the entire longitudinal baffle and partition are completely retracted into the hull. The installation of this device requires a large modification to the bottom of the ship, and the height between the bow and stern coamings and the flat bottom of the ship cannot be adjusted. Summary of the invention

[0004] The object of the present invention is to provide a foldable enclosure device for a ship air layer drag reduction system and an air layer drag reduction ship, so as to solve the problem that the enclosure device in the air layer drag reduction system of the prior art requires significant modification to the bottom of the ship during installation.

[0005] The technical solution of the present invention is:

[0006] A foldable enclosure device for a ship air layer drag reduction system is installed on the flat bottom of an air layer drag reduction ship, and the top of the flat bottom is a ship bottom tank, comprising:

[0007] A plurality of air pocket enclosing plates, each of which is rotatably connected to the lower surface of the flat bottom of the ship, and each of which, after being rotated and unfolded, cooperates to enclose an air pocket for accommodating the air layer of the air layer drag reduction ship;

[0008] A plurality of driving structures, each of the cavitation enclosures is respectively equipped with one or more driving structures, the driving structure comprising a driving member and a transmission member, the driving member is arranged in the ship bottom cabin, one end of the transmission member is connected to the driving member, and the other end passes through the ship flat bottom to be connected to the cavitation enclosure, and a sealing structure is arranged between the transmission member and the ship flat bottom; the driving member drives the cavitation enclosure to rotate relative to the ship flat bottom through the transmission member, so as to realize the unfolding or folding of the cavitation enclosure.

[0009] Preferably, in the foldable enclosure device for the air layer drag reduction system of a ship provided by the present invention, the transmission member is an arc-shaped transmission member, a plurality of first through holes corresponding to the arc-shaped transmission member are provided on the flat bottom of the ship, one end of the arc-shaped transmission member is connected to the driving member, and the other end passes through the first through hole to be connected to the air pocket enclosure plate, and the sealing structure is provided between the arc-shaped transmission member and the first through hole;

[0010] The arc-shaped transmission member slides up and down in the first through hole to drive the cavitation enclosure plate to rotate relative to the flat bottom of the ship.

[0011] Preferably, in the foldable enclosure device for a ship air layer drag reduction system provided by the present invention, the arc-shaped transmission member is an arc-shaped support rod.

[0012] Preferably, the foldable enclosure device for the air layer drag reduction system of a ship provided by the present invention, the sealing structure is a watertight box watertightly connected to the upper surface of the flat bottom of the ship, the watertight box is provided with a second through hole, the arc-shaped transmission member passes through the second through hole, and is watertightly slidably connected to the second through hole.

[0013] Preferably, in the foldable enclosure device for the ship air layer drag reduction system provided by the present invention, the driving member is a hydraulic device, the fixed end of the hydraulic device is connected to the upper surface of the flat bottom of the ship, and the output end of the hydraulic device is connected to the arc-shaped transmission member, driving the arc-shaped transmission member to slide up and down in the first through hole.

[0014] Preferably, in the foldable enclosure device for a ship air layer drag reduction system provided by the present invention, the hydraulic equipment is a hydraulic rod, the hydraulic rod is arranged in the bottom cabin, and the output end of the hydraulic rod is connected to the arc-shaped transmission member.

[0015] Preferably, the foldable enclosure device for a ship air layer drag reduction system provided by the present invention, the cavitation enclosure comprises:

[0016] Two side coamings, respectively arranged on the port side and the starboard side of the flat bottom of the ship along the length direction of the ship;

[0017] A bow coaming, arranged at the bow portion of the flat bottom of the ship along the width direction of the ship;

[0018] A stern coaming, arranged at the stern portion of the flat bottom of the ship along the width direction of the ship;

[0019] The two ship side panels, the bow panel and the stern panel are all rotatably connected to the lower surface of the flat bottom of the ship, and after being rotated and unfolded, they cooperate to enclose an air pocket for accommodating the air layer of the air layer drag reduction ship;

[0020] The two ship side panels, the bow panel and the stern panel are respectively equipped with one or more driving structures for driving the rotation thereof.

[0021] Preferably, in the foldable enclosure device for the air layer drag reduction system of a ship provided by the present invention, the bow coaming and the stern coaming both have a first side connected to the flat bottom of the ship and a second side opposite to the first side;

[0022] A bow flexible member is provided on the stern side of the bow coaming, and the bow flexible member is respectively connected to the flat bottom of the ship and the second side of the bow coaming, and the bow flexible member, the bow coaming and the flat bottom of the ship cooperate to form a first triangular structure;

[0023] A stern flexible member is provided on the stern side of the stern coaming, and the stern flexible member is respectively connected to the flat bottom of the ship and the second side of the stern coaming, and the stern flexible member, the stern coaming and the flat bottom of the ship cooperate to form a second triangular structure.

[0024] Preferably, in the foldable enclosure device for the air layer drag reduction system of a ship provided by the present invention, the air pocket enclosure is hingedly connected to the flat bottom of the ship.

[0025] Preferably, in the foldable enclosure device for the ship air layer drag reduction system provided by the present invention, a solid sealing strip is provided on the rotating outer side of the connection between the ship side enclosure plate and the ship flat bottom.

[0026] Preferably, in the foldable enclosure device for a ship air layer drag reduction system provided by the present invention, the vertical distance between the lowermost end of the ship side enclosure plate when unfolded and the ship flat bottom is between 100 mm and 800 mm.

[0027] Preferably, the foldable enclosure device for the air layer drag reduction system of a ship provided by the present invention, each of the air cavity enclosures comprises a plurality of enclosure sub-plates connected end to end and arranged in a line, and the enclosure sub-plates are rotatably connected to the lower surface of the flat bottom of the ship; each of the enclosure sub-plates is respectively equipped with a driving structure.

[0028] Preferably, the foldable enclosure device for the ship air layer drag reduction system provided by the present invention also includes a plurality of cavitation baffles, each of the cavitation baffles is rotatably connected to the lower surface of the flat bottom of the ship along the length direction of the ship, and the cavitation baffles are all located in the cavitation; each of the cavitation baffles is respectively equipped with one or more of the driving structures.

[0029] An air layer drag reduction ship, the ship is provided with a foldable enclosure device for a ship air layer drag reduction system as described in any one of the above

[0030] Due to the adoption of the above technical solution, the present invention has the following advantages and positive effects compared with the prior art:

[0031] (1) In the foldable enclosure device for the air layer drag reduction system of a ship provided by the present invention, the flat bottom of the ship needs to be cut and processed only at the places where the transmission parts pass through. Compared with the prior art where all the places connected to the air cavity enclosure plate need to be cut and processed, the present invention requires less modification to the bottom of the ship, thereby solving the problem of the prior art that the enclosure device of the air layer drag reduction system requires more modification to the bottom of the ship during installation.

[0032] (2) The foldable enclosure device for the air layer drag reduction system of a ship provided by the present invention, when the driving member pushes or pulls one end of the arc-shaped support rod, the arc-shaped support rod slowly passes through the watertight box and the hull, and the other end pulls or pushes the cavitation enclosure and the cavitation baffle to rotate on the flat bottom of the ship, and the cavitation enclosure and the cavitation baffle can be rotated to fit with the flat bottom of the ship. Therefore, when the air layer drag reduction ship equipped with the present invention is sailing in a shallow waterway, the cavitation enclosure and the cavitation baffle can be rotated to fit with the flat bottom of the ship, thereby maintaining the original draft of the ship and avoiding the increase of draft due to the angle between the cavitation enclosure and the cavitation baffle and the flat bottom of the ship, which affects normal navigation.

[0033] (3) The foldable enclosure device provided by the present invention can adjust the distance between the lowest point of the bow and stern enclosures and the flat bottom of the ship in the vertical direction through the driving structure when the air layer drag reduction system is working, that is, when the jet equipment is jetting, at different speeds and drafts of the ship, thereby increasing the stability of the air layer at the bottom of the ship.

[0034] (4) The foldable enclosure device provided by the present invention can rotate the air pocket enclosure plate and the air pocket partition plate to fit the flat bottom of the ship when the air layer drag reduction system is not working, that is, when the jet device is not jetting, thereby reducing the additional resistance caused by the foldable enclosure device on the bottom of the ship and enhancing the drag reduction and energy saving effects.

[0035] (5) The foldable enclosure device provided by the present invention can reduce the attachment of marine organisms to the cavitation enclosure and the cavitation baffle by rotating the cavitation enclosure and the cavitation baffle.

[0036] (6) The foldable enclosure device provided by the present invention has a fixed sealing strip which can support and fix the air pocket enclosure when it is unfolded and prevent gas leakage in the air pocket.

[0037] (7) The foldable enclosure device provided by the present invention has a watertight box fixed on the upper surface of the flat bottom of the ship. The second through hole on the watertight box and the arc-shaped support rod are watertight when slidably connected, so that when the arc-shaped support rod passes through the first through hole opened on the flat bottom of the ship, water outside the ship cannot enter the ship through the second through hole, that is, the watertight box is a watertight structure, which can prevent water outside the ship from entering the interior of the hull. At the same time, the first through hole on the flat bottom of the ship and the second through hole on the watertight box uniquely determine the sliding path of the arc-shaped support rod, and the first through hole and the second through hole can support and fix the arc-shaped support rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0039] Figure 1 It is a top view schematic diagram of the foldable enclosure device for the air layer drag reduction system of a ship according to the present invention;

[0040] Figure 2 It is a side view schematic diagram of the foldable enclosure device for the air layer drag reduction system of a ship according to the present invention;

[0041] Figure 3 It is a structural schematic diagram of the ship side panel of the present invention in an open state;

[0042] Figure 4 It is a structural schematic diagram of the ship side panel of the present invention in a folded state;

[0043] Figure 5 It is a structural schematic diagram of the bow coaming of the present invention in an open state;

[0044] Figure 6 It is a structural schematic diagram of the bow coaming of the present invention in a folded state;

[0045] Figure 7 It is a structural schematic diagram of the stern coaming of the present invention in an open state;

[0046] Figure 8 It is a structural schematic diagram of the stern coaming of the present invention in a folded state.

[0047] Description of reference numerals:

[0048] 1: hull; 2: flat bottom; 3: side coaming; 4: bow coaming; 5: stern coaming; 6: cavitation baffle; 7: bow flexible part; 8: stern flexible part; 9: bow wedge block; 10: stern wedge block; 11: fixed sealing strip; 12: watertight box; 13: arc support rod; 14: hydraulic equipment; 15: controller; 16: control route. DETAILED DESCRIPTION

[0049] The foldable enclosure device for the ship air layer drag reduction system and the air layer drag reduction ship proposed by the present invention are further described in detail below in combination with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer according to the following description and claims. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise ratios, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0050] Meanwhile, expressions such as “first” and “second” are only used to distinguish multiple configurations, rather than to limit the order between configurations or other features.

[0051] In addition, the expression of “comprising” an element is an “open” expression, which simply means that a corresponding component exists, and should not be interpreted as excluding additional components.

[0052] Example 1

[0053] See also Figures 1 to 8 , this embodiment provides a foldable enclosure device for a ship air layer drag reduction system, which is installed on the ship flat bottom 2 of the air layer drag reduction ship, and the top of the ship flat bottom 2 is the ship bottom tank. The foldable enclosure device for the ship air layer drag reduction system includes a plurality of air pocket enclosures and a plurality of driving structures. Each air pocket enclosure is rotatably connected to the lower surface of the ship flat bottom 2. After each air pocket enclosure is rotated and unfolded, it cooperates to enclose an air pocket for accommodating the air layer of the air layer drag reduction ship. Each air pocket enclosure is respectively equipped with one or more driving structures, and the driving structure includes a driving member and a transmission member. The driving member is arranged in the ship bottom tank, one end of the transmission member is connected to the driving member, and the other end passes through the ship flat bottom 2 and is connected to the air pocket enclosure, and a sealing structure is arranged between the transmission member and the ship flat bottom 2; the driving member drives the air pocket enclosure to rotate relative to the ship flat bottom 2 through the transmission member, so as to realize the unfolding or folding of the air pocket enclosure.

[0054] The foldable enclosure device for the air layer drag reduction system of a ship provided by the present invention only needs to cut the flat bottom 2 of the ship where the transmission parts pass through. In the prior art, since the longitudinal baffles and the longitudinal partitions are all moved up and down relative to the bottom of the ship so as to be retracted into the hull 1 or extended out of the bottom of the ship, the flat bottom 2 of the ship needs to be cut at all places connected with the longitudinal baffles and the longitudinal partitions. In contrast, the modification of the bottom of the ship in this embodiment is relatively small.

[0055] The structure of this embodiment is now described.

[0056] In this embodiment, the cavitation coaming includes two ship side coamings 3, a bow coaming 4 and a stern coaming 5. The two ship side coamings 3 are respectively arranged at the port and starboard parts of the ship flat bottom 2 along the ship length direction, the bow coaming 4 is arranged at the bow part of the ship flat bottom 2 along the ship width direction, and the stern coaming 5 is arranged at the stern part of the ship flat bottom 2 along the ship width direction. Among them, the two ship side coamings 3 are arranged symmetrically about the center line plane of the air layer drag reduction ship. Among them, the two ship side coamings 3, the bow coaming 4 and the stern coaming 5 are all rotatably connected to the ship flat bottom 2.

[0057] During the folding process, the two ship side panels 3 are folded toward the centerline of the air layer drag reduction ship, and the bow panel 4 and the stern panel 5 are folded toward the stern direction. In the unfolded state, the two ship side panels 3 are perpendicular to the ship flat bottom 2, and the angles between the bow panel 4 and the stern panel 5 and the ship flat bottom 2 in the stern direction are all acute angles. Of course, in the unfolded state, the angles between the two ship side panels 3, the bow panel 4, and the stern panel 5 and the ship flat bottom 2 can be adjusted according to actual conditions through the driving structure. After folding, the two ship side panels 3, the bow panel 4, and the stern panel 5 can all be rotated to fit the ship flat bottom 2. The folding methods of the above-mentioned panels have the advantages of being simple and reliable, and having little change to the bottom of the ship. Of course, in other embodiments, the folding directions of the ship side panels 3, the bow panel 4, and the stern panel 5 can also be adjusted according to specific conditions, which is not limited here.

[0058] During the rotation process, the driving device drives the ship side panels 3, the bow panels 4, and the stern panels 5 to rotate and unfold through the transmission parts; after unfolding, the bow ends of the two ship side panels 3 are in contact with the bow panels 4, and the stern ends are in contact with the stern panels 5, and they cooperate to form an air cavity that is not easy to leak at the connection.

[0059] Furthermore, the length of the ship side coaming 3 is designed according to the length of the ship flat bottom 2, so that the air pocket area under the ship flat bottom 2 is as large as possible, and the relative wet surface area of ​​the hull 1 is as small as possible, which further reduces the friction resistance of the hull. The height of the air pocket coaming, that is, the vertical distance between the lower end and the ship flat bottom 2 in the open state, is related to factors such as the ship width and draft. Generally, in the unfolded state, the height of the air pocket coaming is between 100 mm and 800 mm. Of course, according to actual needs, in special circumstances, the distance between them may be less than 100 mm or greater than 800 mm. Therefore, in general, the length of the ship side coaming 3 is adjusted according to the length of the ship flat bottom 2, and the height of the ship side coaming 3 is controlled between 100 mm and 800 mm according to factors such as the ship width and draft.

[0060] In this embodiment, the cavitation panel is rotatably connected to the flat bottom 2 by a hinge. Furthermore, a solid sealing strip is provided on the rotating outer side of the connection between the side panel 3 and the flat bottom 2. The transmission outer side is: the side panel divides the space below the flat bottom into two sides according to the side panel. The first side is that the angle between the side panel and the flat bottom becomes larger during the unfolding of the side panel, and becomes smaller during the folding of the side panel; the second side is that the angle between the side panel and the flat bottom becomes smaller during the unfolding of the side panel, and becomes larger during the folding of the side panel; the second side is the rotating outer side of the side panel. The fixed sealing strip 11 is arranged at the connection between the side panel 3 and the flat bottom 2 and is perpendicular to the flat bottom 2 (forming an L shape, such as Figure 4When the ship side panel 3 is in the unfolded state, the setting of the fixed sealing strip 11 can play the role of supporting and fixing the ship side panel 3 and preventing the gas leakage in the air layer of the air cavity.

[0061] In this embodiment, each cavitation coaming plate can be designed in sections, and each section is also provided with a corresponding driving structure for driving the rotation thereof. That is, the cavitation coaming plates respectively include a plurality of coaming sub-plates arranged in sequence, and the coaming sub-plates are respectively connected to the lower surface of the flat bottom 2 of the ship for rotation, and each coaming sub-plate is respectively provided with one or more of the driving structures. The cavitation coaming plates are designed in sections for ease of manufacture, installation and use.

[0062] In this embodiment, the driving member of the driving structure may be a hydraulic device 14 , the transmission member may be an arc-shaped support rod 13 , and the sealing structure may be a watertight box 12 .

[0063] Specifically, a plurality of first through holes corresponding to the arc-shaped support rods 13 are provided on the flat bottom 2 of the ship, and the arc-shaped support rods 13 pass through the corresponding first through holes. The watertight box 12 is correspondingly arranged at the corresponding arc-shaped support rods 13 and the first through holes. The watertight box 12 is watertightly connected to the upper surface of the flat bottom 2 of the ship, and the first through hole connects the air layer (or water layer) below the flat bottom 2 of the ship and the internal space of the watertight box 12. A second through hole is provided on the watertight box 12. One end of the arc-shaped support rod 13 is rotatably connected to the output end of the hydraulic device 14, and the other end passes through the second through hole on the watertight box 12 and the corresponding first through hole on the flat bottom 2 of the ship below the watertight box 12, extends out of the hull 1, and is fixedly connected to the corresponding air cavity enclosure. The arc-shaped support rod 13 and the second through hole on the watertight box 12 are watertightly slidably connected.

[0064] The cavitation enclosure is pushed and unfolded by the transmission member, so the transmission member needs to be a rod, plate, etc. that is bent by itself. Because the connection position of the cavitation enclosure on the flat bottom 2 of the ship is fixed, and the position of the first through hole on the flat bottom 2 of the ship is fixed, it is necessary that the distance from the transmission member to the connection position between the transmission member and the flat bottom 2 is equal to the distance from the first through hole to the connection position between the transmission member and the flat bottom 2 of the ship, and the transmission member needs to be an arc-shaped transmission member with the connection point between the transmission member and the flat bottom 2 as the center and the above distance as the radius. In order to make the modification of the flat bottom 2 of the ship smaller during the installation of this embodiment, preferably, the arc-shaped transmission member can use an arc-shaped support rod 13. In other embodiments, arc-shaped plates, etc. can also be used.

[0065] The watertight box 12 mainly serves to fix the arc-shaped support rod 13 and ensure watertightness. The second through hole on the watertight box 12 and the arc-shaped support rod 13 are watertight when they are slidably connected, so that when the arc-shaped support rod 13 passes through the first through hole opened on the flat bottom 2 of the boat, water outside the boat cannot enter the boat through the second through hole, that is, the watertight box 12 is a watertight structure, which can prevent water outside the boat from entering the interior of the hull 1. At the same time, the second through hole on the watertight box 12 and the first through hole on the flat bottom 2 of the boat uniquely determine the sliding path of the arc-shaped support rod 13, and the first through hole and the second through hole can support and fix the arc-shaped support rod 13.

[0066] The hydraulic device 14 is arranged in the transfer cabin, and the fixed end is connected to the hull 1. The hydraulic device 14 is used to drive the arc-shaped support rod 13 to slide up and down in the first through hole, that is, the arc-shaped support rod 13 slides up and down on the watertight box 12, driving the cavitation enclosure to rotate, thereby realizing the unfolding and folding of the cavitation enclosure. At the same time, a controller 15 is arranged, and the controller 15 is electrically connected to the hydraulic device 14 through a control circuit, and is used to control the output degree of the hydraulic device 14, thereby controlling the sliding amplitude of the arc-shaped support rod 13 on the watertight box 12, and then controlling the rotation angle of the cavitation enclosure. Specifically, in this embodiment, the hydraulic device 14 can be a hydraulic rod, and the controller 15 is electrically connected to the hydraulic rod through a control circuit. The fixed end of the hydraulic rod is rotatably connected to the upper surface of the flat bottom 2 of the ship, and the output end is connected to the arc-shaped support rod 13. By controlling the length of the output end of the hydraulic rod extending out, the sliding amplitude of the arc-shaped support rod 13 is controlled, and then the rotation angle of the cavitation enclosure is controlled. In other implementations, other driving members that can enable the arc-shaped support rod 13 to slide on the watertight box 12 can also be used. Even if the hydraulic device 14 is used, other non-hydraulic cylinder options can also be used.

[0067] The working principle of the foldable enclosure device for the ship air layer drag reduction system provided in this embodiment is further described below:

[0068] Please refer to Figure 3 and Figure 4 During the unfolding process of the ship side panel 3, the controller 15 drives the output end of the hydraulic rod to retract through the control route 16, and the arc-shaped support rod 13 passes through the ship flat bottom 2 through the watertight box 12 and enters the water at the bottom of the ship, pushing the ship side panel 3 and the cavitation partition 6 to slowly open downward until the fixed sealing strip 11 is attached to and fixed to the ship flat bottom 2. At this time, the ship side panel 3 and the cavitation partition 6 are both perpendicular to the ship flat bottom 2, reaching a better unfolding state.

[0069] During the folding process of the ship side panel 3, the controller 15 drives the output end of the hydraulic rod to extend through the control circuit, and the arc-shaped support rod 13 is retracted into the inside of the ship flat bottom 2 through the watertight box 12, pulling the ship side panel 3 to fold upward slowly until the ship side panel 3 is in contact with the ship flat bottom 2 and reaches a folded state.

[0070] Please refer to Figures 5 to 8 During the opening process of the bow coaming 4 and the stern coaming 5, the controller 15 drives the output end of the hydraulic rod to contract through the control circuit, pushing the bow coaming 4 and the stern coaming 5 to slowly open downward. By adjusting the extension length of the output end of the hydraulic rod, the intersection of the bow coaming 4 and the stern coaming 5 with the flat bottom 2 of the ship can be adjusted, that is, the vertical distance between the lowest end of the bow coaming 4 and the stern coaming 5 and the flat bottom 2 of the ship can be adjusted.

[0071] During the folding process of the bow coaming 4 and the stern coaming 5, the controller 15 drives the output end of the hydraulic rod to extend through the control circuit, pulling the bow coaming 4 and the stern coaming 5 to slowly fold upward until the bow coaming 4 and the stern coaming 5 are in contact with the flat bottom 2 of the ship.

[0072] Among them, the cavitation enclosure reduces the attachment of marine organisms on itself by rotating.

[0073] Example 2

[0074] Please see Figure 2 , Figures 5 to 8 In this embodiment, based on the first embodiment, a bow wedge block 9 and a stern wedge block 10 are provided.

[0075] The bow coaming 4 and the stern coaming 5 each have a first side connected to the flat bottom 2 of the ship and a second side corresponding to the first side.

[0076] A bow flexible member 7 is arranged on the stern side of the bow coaming, and the bow flexible member 7 is connected to the second sides of the ship flat bottom 2 and the bow coaming 4 respectively. In the unfolded state, the bow flexible member 7, the bow coaming 4 and the ship flat bottom 2 cooperate to form a first triangular structure, and the first triangular area is the bow wedge block 8; the height of the bow wedge block 9 is the distance between the lowermost end of the bow coaming 4 and the ship flat bottom 2 when in the unfolded state.

[0077] A stern flexible member 8 is provided on the stern side of the stern coaming, which is respectively connected to the second sides of the flat bottom 2 and the stern coaming 5. In the unfolded state, the stern flexible member 8, the stern coaming 5 and the flat bottom 2 cooperate to form a second triangular structure. The second triangular area is the stern wedge block 10. The height of the stern wedge block 10 is the distance between the lowermost end of the stern coaming 5 and the flat bottom 2 when in the unfolded state.

[0078] The bow wedge block 9 and the stern wedge block 10 are provided. When the ship sails at different speeds, the heights of the bow wedge block 9 and the stern wedge block 10 can be adjusted to reduce the vortex resistance formed behind the bow coaming 4 and enhance the stability of the air layer in the air cavity. Further, if the bow coaming 4 and the stern coaming 5 are designed in sections, the flexible member is also designed in sections together with the corresponding bow coaming 4 or stern coaming 5, that is, the bow wedge block 9 and the stern wedge block 10 are designed in sections.

[0079] Specifically, the bow flexible member 7 and the stern flexible member 8 in this embodiment can both be rubber rings. Of course, in other embodiments, the bow flexible member 7 and the stern flexible member 8 can be other flexible members, which are not limited here.

[0080] During the unfolding process of the bow coaming 4 and the stern coaming 5, when the bow coaming 4 and the stern coaming 5 are slowly opened downward, the corresponding bow flexible member 7 and the stern flexible member 8 are also pulled apart from the folded state. By adjusting the extension length of the output end of the hydraulic rod, the height of the bow wedge block 9 and the stern wedge block 10 can be adjusted.

[0081] During the folding process of the bow coaming 4 and the stern coaming 5, when the bow coaming 4 and the stern coaming 5 are slowly folded upward, the corresponding bow flexible member 7 and the stern flexible member 8 are also slowly contracted and folded from the stretched state until the bow coaming 4 and the stern coaming 5 are in contact with the flat bottom 2 of the boat.

[0082] Example 3

[0083] Please see Figure 1 , Figure 3 and Figure 4 On the basis of Example 1 or Example 2, a plurality of cavitation baffles 6 are arranged in the cavitation, that is, the cavitation baffles are all located between the two ship side baffles 3.

[0084] Each air cavity baffle 6 is respectively connected to the lower surface of the flat bottom 2 of the ship by rotation along the length direction of the ship, dividing the air cavity into a plurality of air chambers. Preferably, the plurality of air cavity baffles 6 are symmetrical about the center line of the bottom of the ship, and evenly divide the air cavity into a plurality of air chambers.

[0085] Each cavitation baffle 6 is respectively equipped with one or more driving structures as described in Example 1. The connection and positional relationship between the specific cavitation baffle 6 and the driving structure and the flat bottom 2 are the same as the connection and positional relationship between the ship side panel 3 and the driving structure and the flat bottom 2. The cavitation baffle 6 is connected to the follower in the corresponding driving structure. The cavitation baffle 6 and the flat bottom 2 are also connected by a hinge, and a fixed sealing strip 11 is provided on the rotating outer side of the connection to support and fix the cavitation baffle 6 and prevent air leakage in the air cavity.

[0086] Furthermore, the air cavity baffle 6 rotates toward the center line during the folding process. Preferably, the air cavity baffle 6 is perpendicular to the flat bottom 2 of the boat in the unfolded state.

[0087] The length of the cavitation baffle 6 is related to the positions of the bow coaming 4 and the stern coaming 5 (or the bow wedge block 9 and the stern wedge block 10). The bow end of the cavitation baffle 6 is close to the bow coaming 5 (or the bow wedge block 9), and the stern end of the cavitation baffle 6 is close to the stern coaming 5 (or the stern wedge block 10). The number of cavitation baffles 6 is related to factors such as the ship width, draft, and heel angle of the ship. The height value of the cavitation baffle 6, that is, the vertical distance value between the lower end of the cavitation baffle and the flat bottom 2 of the ship when the cavitation baffle is unfolded, is close to the height value of the cavitation baffle.

[0088] The cavitation baffle 6 may also be designed in sections, each section being provided with a corresponding driving structure for driving the rotation thereof, and the sectioned interface of the cavitation baffle 6 is designed to prevent air leakage.

[0089] Example 4

[0090] Please see Figures 1 to 8 , an air layer drag reduction ship, on which is installed a ship air layer drag reduction system, and the enclosure device for accommodating the bottom air layer in the ship air layer drag reduction system adopts any one or more of the foldable enclosure devices for the ship air layer drag reduction system in the above-mentioned embodiments 1, 2, and 3.

[0091] The foldable enclosure device used in the air layer drag reduction system of a ship can realize the rotation of the enclosure structure, namely the air cavity enclosure plate and the air cavity partition plate 6 relative to the flat bottom 2 of the ship.

[0092] Therefore, the air layer drag reduction ship provided in this embodiment can rotate the cavitation enclosure and the cavitation baffle 6 to fit with the flat bottom 2 of the ship when sailing in a shallow water channel, thereby maintaining the original draft of the ship and avoiding the increase in draft due to the angle between the cavitation enclosure and the cavitation baffle 6 and the flat bottom 2 of the ship, which affects normal navigation.

[0093] When the air layer drag reduction system is working, that is, when the jet equipment is jetting, the air layer drag reduction ship can adjust the distance between the lowest point of the bow coaming 4 and the stern coaming 5 and the flat bottom 2 of the ship in the vertical direction through the driving structure at different speeds and different drafts, thereby increasing the stability of the air layer at the bottom of the ship.

[0094] When the air layer drag reduction system is not working, that is, when the jet equipment is not jetting, the cavitation enclosure and the cavitation baffle 6 can be rotated to fit with the flat bottom 2 of the ship, reducing the additional resistance caused by the foldable enclosure device used for the ship's air layer drag reduction system on the bottom of the ship, thereby enhancing the drag reduction and energy saving effects.

[0095] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they still fall within the protection scope of the present invention.

Claims

1. A foldable enclosure device for a ship air layer drag reduction system, installed on the flat bottom of an air layer drag reduction ship, above which is a ship bottom tank, characterized in that: include: A plurality of air pocket enclosing plates, each of which is rotatably connected to the lower surface of the flat bottom of the ship, and each of which, after being rotated and unfolded, cooperates to enclose an air pocket for accommodating the air layer of the air layer drag reduction ship; A plurality of driving structures, each of the cavitation enclosures is respectively equipped with one or more driving structures, the driving structure comprising a driving member and a transmission member, the driving member is arranged in the ship bottom cabin, one end of the transmission member is connected to the driving member, and the other end of the transmission member passes through the ship flat bottom and is connected to the cavitation enclosure, and a sealing structure is arranged between the transmission member and the ship flat bottom; the driving member drives the cavitation enclosure to rotate relative to the ship flat bottom through the transmission member, so as to realize the expansion or folding of the cavitation enclosure; Wherein, the transmission member is an arc-shaped transmission member, and a plurality of first through holes corresponding to the arc-shaped transmission member are provided on the flat bottom of the ship, one end of the arc-shaped transmission member is connected to the driving member, and the other end passes through the first through hole and is connected to the air cavity enclosure plate, and the sealing structure is provided between the arc-shaped transmission member and the first through hole; the arc-shaped transmission member slides up and down in the first through hole to drive the air cavity enclosure plate to rotate relative to the flat bottom of the ship; The sealing structure is a watertight box watertightly connected to the upper surface of the flat bottom of the ship, the watertight box is provided with a second through hole, the arc-shaped transmission member passes through the second through hole and is watertightly slidably connected to the second through hole; The arc-shaped transmission member is an arc-shaped support rod.

2. The foldable enclosure device for a ship air layer drag reduction system according to claim 1, characterized in that: The driving member is a hydraulic device, a fixed end of the hydraulic device is connected to the upper surface of the flat bottom of the boat, and an output end of the hydraulic device is connected to the arc-shaped transmission member to drive the arc-shaped transmission member to slide up and down in the first through hole.

3. The foldable enclosure device for a ship air layer drag reduction system according to claim 2, characterized in that: The hydraulic equipment is a hydraulic rod, which is arranged in the bottom cabin of the ship, and the output end of the hydraulic rod is connected to the arc-shaped transmission member.

4. The foldable enclosure device for a ship air layer drag reduction system according to claim 1, characterized in that: The cavitation enclosure plate comprises: Two side coamings, respectively arranged on the port side and the starboard side of the flat bottom of the ship along the length direction of the ship; A bow coaming, arranged at the bow portion of the flat bottom of the ship along the width direction of the ship; A stern coaming, arranged at the stern portion of the flat bottom of the ship along the width direction of the ship; The two ship side panels, the bow panel and the stern panel are all rotatably connected to the lower surface of the flat bottom of the ship, and after being rotated and unfolded, they cooperate to enclose an air pocket for accommodating the air layer of the air layer drag reduction ship; The two ship side panels, the bow panel and the stern panel are respectively equipped with one or more driving structures for driving the rotation thereof.

5. The foldable enclosure device for a ship air layer drag reduction system according to claim 4, characterized in that: The bow coaming and the stern coaming each have a first side connected to the flat bottom of the ship and a second side opposite to the first side; A bow flexible member is provided on the stern side of the bow coaming, and the bow flexible member is respectively connected to the flat bottom of the ship and the second side of the bow coaming, and the bow flexible member, the bow coaming and the flat bottom of the ship cooperate to form a first triangular structure; A stern flexible member is provided on the stern side of the stern coaming, and the stern flexible member is respectively connected to the flat bottom of the ship and the second side of the stern coaming, and the stern flexible member, the stern coaming and the flat bottom of the ship cooperate to form a second triangular structure.

6. The foldable enclosure device for a ship air layer drag reduction system according to claim 4, characterized in that: The air pocket coaming is hingedly connected to the flat bottom of the ship.

7. The foldable enclosure device for a ship air layer drag reduction system according to claim 6, characterized in that: A solid sealing strip is arranged on the rotating outer side of the connection between the ship side panel and the ship flat bottom.

8. The foldable enclosure device for a ship air layer drag reduction system according to claim 4, characterized in that: The vertical distance between the lowermost end of the ship side panel when unfolded and the ship flat bottom is between 100 mm and 800 mm.

9. The foldable enclosure device for a ship air layer drag reduction system according to claim 1, characterized in that: Each of the cavitation enclosures comprises a plurality of enclosure sub-plates arranged in sequence, and the enclosure sub-plates are rotatably connected to the lower surface of the flat bottom of the ship respectively; each of the enclosure sub-plates is equipped with one or more of the driving structures respectively.

10. The foldable enclosure device for a ship air layer drag reduction system according to claim 1, characterized in that: It also includes a plurality of cavitation baffles, each of which is rotatably connected to the lower surface of the flat bottom of the ship along the length of the ship, and each of which is located in the air cavity; each of the cavitation baffles is equipped with one or more of the driving structures.

11. An air layer drag reduction ship, characterized in that: A foldable enclosure device for a ship air layer drag reduction system as described in any one of claims 1 to 10 is provided on board.

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