• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A ship hull (1) comprises a starboard side frame structure (2), a port side frame structure (3) and a double bottom structure (4) extending between the starboard and port side frame structures. The double bottom structure comprises an inner bottom (5), an outer bottom (6) and a height (hDB). An air cavity (7) arranged below the double bottom structure (4). At least one vertical partition (8) is arranged in the air cavity to extend at its length for dividing into separate longitudinal compartments (9). The ship hull (1) comprises a plurality of horizontal cross plates (12) connected to the starboard and port side frame structures (2, 3) and to the lower edge(s) (11) of the partition(s) (8). The cross plates (12) are arranged at a distance from each other along the length of the air cavity (7) and extend transversally in relation to the longitudinal direction of the ship hull (1). The double bottom structure (4) is lower than required by the rules for ship classification having the height (hDB) which is greater than 200 mm and smaller than 1000 * B/20 in millimeters, wherein B is breadth of the ship hull (1) in meters.
    公开号:FI20185746A1
    申请号:FI20185746
    申请日:2018-09-07
    公开日:2020-03-08
    发明作者:Oskar Levander
    申请人:Rolls Royce Oy Ab；
    IPC主号:
    专利说明:

    A SHIP HULL AND USES OF THE SHIP HULL
    FIELD OF THE INVENTION
    The present invention relates to a ship hull. Further, 5 the invention relates to uses of the ship hull.
    BACKGROUND OF THE INVENTION
    In prior art, eg. from WO 2014/186875 Al is known a vessel having an air cushion cavity defined in its 10 bottom. The vessel has a ship hull comprising a starboard side frame structure and a port side frame structure. A bottom structure extends between the starboard and port side frame structures. An air cavity is arranged below the bottom structure. Partitions 15 are arranged in the air cavity and extending at the length of the air cavity for dividing the air cavity into separate longitudinal compartments.
    Further, from the document CHALMERS, Shipping and Ma20 rine Technology, Master's Thesis 2015: X -15/321, ISSN 1652-8557,Consequence analysis for Air cavity design, A comparable structural and hydrostatic study between a conventional hull and an Air cavity hull, Patrik Molander, Mathias Lindbäck, is known a ship hull hav25 ing air cavity which is divided into longitudinal compartments by longitudinal partitions and in which the bottom structure is a double bottom structure.
    In the air cavity hull design concepts described in 30 these documents air pockets are introduced in the bottom structure keeping the air under pressure as an air cushion. The water surfaces inside the air pockets substitute the hull plating whereby the interface between the water and the air provides lower friction 35 that the interface between water and the hull. This reduces viscous resistance in the water and thereby
    20185746 prh 07-09- 2018 reduces fuel consumption, but the drawback is that the air cavity and the double bottom structure occupies space reducing the space available for the payload.
    SUMMARY OF THE INVENTION
    According to a first aspect, the present invention provides a ship hull comprising a starboard side frame structure, a port side frame structure and a double bottom structure extending between the star10 board and port side frame structures. The double bottom structure comprises an inner bottom, an outer bottom and a height. Further the ship hull comprises an air cavity arranged below the double bottom structure. At least one vertical partition is arranged in the air 15 cavity and extends at the length of the air cavity for dividing the air cavity into separate longitudinal compartments- The partition has an upper edge and a lower edge, the upper edge of the partition being connected to the outer bottom. According to the invention 20 the ship hull comprises a plurality of horizontal cross plates connected to the starboard and port side frame structures and to the lower edge(s) of the partition (s) . The cross plates are arranged at a distance from each other along the length of the air cavity. 25 The cross plates extend transversally in relation to the longitudinal direction of the ship hull. The double bottom structure is lower than required by the rules for ship classification, thus having the height which is greater than 200 mm and smaller than 1000 * 30 B/20 in millimeters, wherein B is breadth of the ship hull in meters. The partitions and the cross plates together with the double bottom structure provide a sufficient strength and structural integrity for the ship hull against grounding.
    This kind of ship design can be used for many different cargo vessels, such as bulkers, general cargo vessels, tankers and container vessels.
    The advantage of the invention is that, although the double bottom structure is lower than required by the rules for ship classification, it is able to provide together with the partitions and the cross plates, a sufficient strength and structural integrity for the 10 ship hull against grounding and puncture.
    In an embodiment of the invention, the height of the double bottom structure is smaller than required IMO SOLAS rule for double bottom height. IMO SOLAS 15 stands for the International Convention for the Safety of Life at Sea (SOLAS) of the International Maritime Organization (IMO). SOLAS is an international maritime treaty which sets minimum safety standards in the construction, equipment and operation of merchant ships. 20 The convention requires signatory flag states to ensure that ships flagged by them comply with at least these standards .
    20185746 prh 07-09- 2018
    In an embodiment of the invention, the cross plates 25 are arranged at a height from a baseline of the ship hull.
    In an embodiment of the invention, the cross plates are located at the height of at least 10 cm from the 30 baseline of the ship hull.
    In an embodiment of the invention, the cross plate comprises a rounded front edge.
    In an embodiment of the invention, the cross plate has a streamline shape.
    In an embodiment of the invention, the cross plate has a wing-like profile.
    20185746 prh 07-09- 2018
    In an embodiment of the invention, the ship hull com5 prises an air management system for adjusting the air amount and pressure in the air cavity.
    According to a second aspect, the present invention provides use of the ship hull according to the first aspect in a ballast-free ship.
    According to a second aspect, the present invention provides use of the ship hull according to the first aspect in a ship having a ballast water system.
    It is to be understood that the aspects and embodiments of the invention described above may be used in any combination with each other. Several of the aspects and embodiments may be combined together to form 20 a further embodiment of the invention.
    BRIEF DESCRIPTION OF THE DRAWINGS
    The accompanying drawings, which are included to provide a further understanding of the invention and 25 constitute a part of this specification, illustrate embodiments of the invention and together with the description help to explain the principles of the invention. In the drawings:
    Figure 1 is a schematic longitudinal section of a ship hull according to one embodiment of the invention,
    Figure 2 is an enlarged cross-section II-II from Figure 1, and 35
    Figs 3a, 3b, and 3c show cross-sectional profiles of various embodiments of the cross plates.
    20185746 prh 07-09- 2018
    DETAILED DESCRIPTION OF THE INVENTION
    Figures 1 and 2 show a ship hull 1 comprising a starboard side frame structure 2 and port side frame 5 structure 3. The ship hull 1 comprises a double bottom structure 4 extending between the starboard side frame structure 2 and the port side frame structure 3. The double bottom structure comprises an inner bottom 5 and an outer bottom 6. The double bottom structure 4 10 has a height hDB. An air cavity 7 is arranged below the double bottom structure 4. Vertical partitions 8, which in this embodiment are four vertical partitions 8, are arranged in the air cavity 7. The vertical partitions 8 extend at the whole length of the air cavity 15 7 and divide the air cavity 7 into separate longitudinal compartments 9. The partitions 8 have upper edges and lower edges 11. The upper edges 10 of the partitions 8 are connected to the outer bottom 6 of the double bottom structure 4.
    The ship hull 1 further comprises a plurality of horizontal cross plates 12 connected to the starboard and port side frame structures 2, 3 and to the lower edges of the partitions 8. The cross plates 12 are ar25 ranged at a distance from each other along the length of the air cavity 7. The cross plates 12 extend transversally in relation to the longitudinal direction of the ship hull 1 between the starboard and port side frame structures 2, 3. 30
    The double bottom structure 4 is lower than required by the rules for ship classification, specifically IMO SOLAS rule for double bottom height. The double bottom structure 4 has the height hDB which is greater than 35 200 mm and smaller than 1000 * B/20 in millimeters, wherein B is breadth of the ship hull 1 in meters. The partitions 8 and the cross plates 12 together with the
    20185746 prh 07-09- 2018 double bottom structure 4 provide a sufficient strength and structural integrity for the ship hull against grounding.
    The height hDB of the double bottom structure 4 is smaller than required by the IMO SOLAS rule for double bottom height. E.g. the document 01/11/1974 SOLAS Convention: International Convention of 1 November 1974 for the Security of Life at Sea, 1974, Regulation 9:
    Double bottoms in passenger ships and cargo ships other than tankers rules for the normal double bottom structure :
    Where a double bottom is required to be fitted the inner bottom shall be continued out to the ship's sides in such a manner as to protect the bottom to the turn of the bilge. Such protection will be deemed satisfactory if the inner bottom is not lower at any part than a plane parallel with the keel line and which is located not less than a vertical distance h measured from the keel line, as calculated by the formula :
    h = B/20
    However, in no case is the value of h to be less than 760 mm, and need not be taken as more than 2000 mm.
    In an embodiment of the present invention the height is at least 500 mm which is still practical relative to manufacturing.
    With reference to Figure 2, the cross plates 12 are arranged at a height h from a baseline (. of the ship hull 1. Preferably, the cross plates 12 are located at the height h of at least 10 cm from the baseline (. of the ship hull 1. Thereby, ideally the cross plates 12 35 are above the water level in the air cavity so that the cross plates do not contact water when the ship is in a laden condition.
    With reference to Figures 3a - 3c, since the cross plates 12, however may be in contact with the water during travel, the cross plates 12 preferably comprise 5 rounded front edges 13. In some further embodiments, as illustrated in Figures 3b and 3c the cross plates 12 may have a streamline shape. Figure 3c shows an embodiment wherein the cross plate 12 has a wing-like profile . 10
    The ship hull 1 may comprise an air management system (not shown in Figures) for adjusting the air amount and pressure in the air cavity 7.
    The ship hull having the disclosed combination of the air cavity system and the low double bottom structure is usable in a ballast-free ship, as well as in a ship having a ballast water system.
    Further, the combination of the air cavity system and the low double bottom structure is usable in ship hulls of cargo vessels, such as bulkers, general cargo vessels, tankers and container vessels.
    20185746 prh 07-09- 2018
    Although the invention has been the described in conjunction with a certain type of ship hull, it should be understood that the invention is not limited to any certain type of ship hull. While the present inventions have been described in connection with a number 30 of exemplary embodiments, and implementations, the present inventions are not so limited, but rather cover various modifications, and equivalent arrangements, which fall within the purview of prospective claims.
    权利要求:
    Claims (10)
    [1] 20185746 prh 07-09- 2018
    1. A ship hull (1) comprising
    - a starboard side frame structure (2),
    5 - a port side frame structure (3),
    - a double bottom structure (4) extending between the starboard and port side frame structures, the double bottom structure comprising an inner bottom (5), an outer bottom (6) and a height (hDB) ,
    10 - an air cavity (7) arranged below the double bottom structure (4) for reducing resistance, at least one vertical partition (8) arranged in the air cavity and extending at the length of the air cavity for dividing the air cavity into 15 separate longitudinal compartments (9), the partition (8) having an upper edge (10) and a lower edge (11), the upper edge (10) of the partition (8) being connected to the outer bottom (6), characterized in that the ship hull (1) comprises a plurality of 20 horizontal cross plates (12) connected to the starboard and port side frame structures (2, 3) and to the lower edge(s) (11) of the partition(s) (8), the cross plates (12) being arranged at a distance from each other along the length of the air cavity (7), the 25 cross plates extending transversally in relation to the longitudinal direction of the ship hull (1), and that the double bottom structure (4) is lower than required by the rules for ship classification having the height (hDB) which is greater than 200 mm and smaller 30 than 1000 * B/20 in millimeters, wherein B is breadth of the ship hull (1) in meters, whereby the partitions (8) and the cross plates (12) together with the double bottom structure (4) provide a sufficient strength and structural integrity for the ship hull against ground35 ing.
    20185746 prh 07-09- 2018
    [2] 2. The ship hull according to claim 1, characterized in that the height (hDB) of the double bottom structure (4) is smaller than required by the IMO SOLAS rule for double bottom height.
    [3] 3. The ship hull according to claim 1 or 2, characterized in that the cross plates (12) are arranged at a height (h) from a baseline ((. ) of the ship hull (1).
    [4] 4. The ship hull according to any one of the claims 1 to 3, characterized in that the cross plates (12) are located at the height (h) of at least 10 cm from the baseline (O of the ship hull (1).
    [5] 5. The ship hull according to any one of the claims 1 to 4, characterized in that the cross plate (12) comprises a rounded front edge (13).
    20
    [6] 6. The ship hull according to any one of the claims 1 to 5, characterized in that the cross plate (12) has a streamline shape.
    [7] 7. The ship hull according to any one of the claims 1 25 to 6, characterized in that the cross plate (12) has a wing-like profile.
    [8] 8. The ship hull according to any one of the claims 1 to 7, characterized in that the ship hull (1)
    30 comprises an air management system for adjusting the air amount and pressure in the air cavity (7).
    [9] 9. Use of the ship hull according to any one of the claims 1 to 8 in a ballast-free ship.
    [10] 10. Use of the ship hull according to any one of the claims 1 to 8 in a ship having a ballast water system.
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    同族专利:
    公开号 | 公开日
    FI128545B|2020-07-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2020-04-09| PC| Transfer of assignment of patent|Owner name: KONGSBERG MARITIME FINLAND OY |
    2020-07-31| FG| Patent granted|Ref document number: 128545 Country of ref document: FI Kind code of ref document: B |
    优先权:
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    FI20185746A|FI128545B|2018-09-07|2018-09-07|A ship hull and uses of the ship hull|FI20185746A| FI128545B|2018-09-07|2018-09-07|A ship hull and uses of the ship hull|
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