• 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:
    The present invention relates to a fin for enhancing the efficiency of a propeller of a vessel, comprising: a fin body, and a first flap rotatably connected with the fin body around an axis and comprising a first protruding part projecting into the fin body, wherein the fin further comprises a first actuation means having a first chamber and a second chamber arranged on each side of the first protruding part, the first actuation means being configured to pressurise the first chamber or the second chamber to rotate the first flap around the axis. Furthermore, the present invention relates to a vessel comprising a propeller and a fin.
    公开号:DK201671012A1
    申请号:DKP201671012
    申请日:2016-12-21
    公开日:2018-07-13
    发明作者:Boesen Kenneth；Hvoldal Mads；Ring Nielsen Jens
    申请人:MAN DIESEL & TURBO；
    IPC主号:
    专利说明:

    (19) DANMARK (1°) DK 2016 71012 A1
    (12)
    PATENTANSØGNING
    Patent- og Varemærkestyrelsen
    Int.CI.: B63H 5/125 (2006.01) B63H 5/07 (2006.01)
    Ansøgningsnummer: PA 2016 71012
    Indleveringsdato: 2016-12-21
    Løbedag: 2016-12-21
    Aim. tilgængelig: 2018-06-22
    Publiceringsdato: 2018-07-13
    Ansøger:
    MAN DIESEL & TURBO, FILIAL AF MAN DIESEL & TURBO SE, TYSKLAND, Teglholmsgade 41,2450 København SV, Danmark
    Opfinder:
    Kenneth Boesen, c/o MAN Diesel & Turbo Teglholmsgade 41,2450 København SV, Danmark Mads Hvoldal, c/o MAN Diesel & Turbo Teglholmsgade 41,2450 København SV, Danmark Jens Ring Nielsen, c/o MAN Diesel & Turbo Teglholmsgade 41,2450 København SV, Danmark
    Fuldmægtig:
    HOFFMANN DRAGSTED A/S, Rådhuspladsen 16,1550 København V, Danmark
    Titel: A PRE-SWIRL FIN
    Fremdragne publikationer:
    US5141456A
    US3270699A
    US3244135A
    US5469801 A
    Sammendrag:
    The present invention relates to a fin for enhancing the efficiency of a propeller of a vessel, comprising: a fin body, and a first flap rotatably connected with the fin body around an axis and comprising a first protruding part projecting into the fin body, wherein the fin further comprises a first actuation means having a first chamber and a second chamber arranged on each side of the first protruding part, the first actuation means being configured to pressurise the first chamber or the second chamber to rotate the first flap around the axis. Furthermore, the present invention relates to a vessel comprising a propeller and a fin.
    Fortsættes...
    DK 2016 71012 A1
    DK 2016 71012 A1 i
    A PRE-SWIRL FIN
    Field of the invention
    The present invention relates to a fin for enhancing the efficiency of a propeller of a vessel. Furthermore, the present invention relates to a vessel comprising a propeller and a fin.
    Background art
    Many different solutions have been suggested in order to minimise the energy consumption of a vessel. Recently, it has been suggested to mount a pre-swirl device, such as a pre-swirl stator, a pre-swirl fin or a pre-swirl duct on the stern boss in front of the propeller of the vessel so that the water flow is re-directed before entering the propeller blades. Even though the pre-swirl device itself adds resistance, its re-direction of the inflow to the propeller blades may enhance the propulsive efficiency of the propeller, resulting in an overall minimisation of the energy consumption of the vessel. Normally, several pre-swirl fins are arranged in front of the propeller for guiding the fluid.
    Even though the suggested pre-swirl device solutions seem promising in respect of minimising energy consumption, there is a need for further enhancing the propulsive efficiency, so that energy consumption may be further minimised.
    Summary of the invention
    It is an object of the present invention to wholly or partly overcome the above disadvantages and drawbacks of the prior art. More specifically, it is an object to provide an improved fin for enhancing the efficiency of a propeller in order to minimise the energy consumption of the vessel.
    The above objects, together with numerous other objects, advantages and features, which will become evident from the below description, are accomplished by a solution in accordance with the present invention by a fin for enhancing the efficiency of a propeller of a vessel, comprising:
    - a fin body, and
    DK 2016 71012 A1
    - a first flap rotatably connected with the fin body around an axis and comprising a first protruding part protruding into the fin body, wherein the fin further comprises a first actuation means having a first chamber and a second chamber arranged on each side of the first protruding part, the first actuation means being configured to pressurise the first chamber or the second chamber to rotate the first flap around the axis.
    By having an adjustable first flap on the fin, e.g. a pre-swirl fin, the inflow to the propeller can be changed, e.g. when the vessel is loaded with more load than it carried when arriving to a harbour. Consequently, it is possible to optimise the inflow direction to fit the present condition of the vessel so that less fuel is used in order to carry the load on board from one harbour to another. When building prior art vessels, the fins are fixedly mounted onto the side of the vessel in a predetermined angle for guiding the inflow to the propeller in a direction suitable for only one load and one weather condition. However, due to the fact that the load will change many times, and as will the weather, the inflow is not always optimal as compared to the load condition or the weather conditions under which the vessel operates. Tests have shown that by regulating the inflow direction of fluid to the propeller, and thus rotate the first flap, less fuel is used for driving the propeller.
    The fin may be a pre-swirl fin or a post-swirl fin.
    When the fin is a pre-swirl fin, the fin is used to optimise an inflow to a propeller of the vessel, and thus enhance the efficiency of the propeller. Normally, several pre-swirl fins may be arranged in front of the propeller for guiding the fluid.
    Also, the fin body may comprise a wall and the first protruding part may abut the wall, thereby dividing the fin body into the first chamber and the second chamber.
    Moreover, a sealing means may be provided between the first flap and the wall of the fin body.
    In one embodiment, the first actuation means may comprise a first expandable bag and a second expandable bag, the first expandable bag defining the first chamber and the second expandable bag defining the second chamber.
    DK 2016 71012 A1
    In another embodiment, each expandable bag may be an inflatable bladder.
    In yet another embodiment, each expandable bag may be a bellows.
    Furthermore, the inflatable bladder or bellows may have reinforcement means.
    Also, each bag may contain an anti-freeze additive.
    Moreover, each chamber may be pressurised with liquid, such as seawater.
    In addition, each chamber may be fluidly connected with a pump.
    Further, the fin body may comprise the pump.
    The fin according to the present invention may further comprise a position detector configured to detect the position of the first flap.
    Also, the fin may comprise a second flap and a second actuation means, the second flap having a second protruding part.
    In one embodiment, the protruding part may be a plate.
    In another embodiment, the position detector may be an encoder, a taco-pickup, a rotary encoder or a distance sensor.
    In yet another embodiment, the pump and the chambers may be fluidly connected by means of hydraulic pipes.
    Furthermore, the fin body may comprise a first spring and a second spring arranged on each side of the first protruding part.
    Moreover, the fin may further comprise a second actuation means, a third actuation means and a fourth actuation means arranged between the first actuation means and the first flap.
    DK 2016 71012 A1
    Finally, the present invention relates to a vessel comprising a propeller and a fin according to the present invention, the fin being arranged in front of the propeller.
    Brief description of the drawings
    The invention and its many advantages will be described in more detail below with reference to the accompanying schematic drawings, which for the purpose of illustration show some non-limiting embodiments and in which
    Fig. 1 shows a partly cross-sectional view of a fin arranged upstream of a propeller on a vessel,
    Fig. 2 shows a cross-sectional view of fin having a flap in one position,
    Fig. 3 shows a cross-sectional view of the fin of Fig. 2 with the flap being in another position,
    Fig. 4 shows a partly cross-sectional view of another fin having several flaps,
    Fig. 5 shows a cross-sectional view of yet another fin, and
    Fig. 6 shows a cross-sectional view of yet another fin.
    All the figures are highly schematic and not necessarily to scale, and they show only those parts which are necessary in order to elucidate the invention, other parts being omitted or merely suggested.
    Detailed description of the invention
    Fig. 1 shows a fin 1 mounted on a hull of the vessel, e.g. a stern boss 33, upstream of a propeller 30 for optimising an inflow to the propeller 30 of a vessel 31, and the fin 1 is thus a pre-swirl fin. The fin may in another embodiment be arranged downstream of the propeller, and the fin 1 is thus a post-swirl fin. The fin is in the following explained in relation to a pre-swirl fin. The fin 1 comprises a fixed fin body 2, and a first flap 3 rotatably connected with the fin body 2 around an axis 4, the first flap 3 comprising a first protruding part 5 protruding into the
    DK 2016 71012 A1 fin body 2. The fin 1 further comprises a first actuation means 6 having a first chamber 7 and a second chamber 8 arranged on each side of the first protruding part 5, the first actuation means 6 being configured to pressurise the first chamber 7 or the second chamber 8 to rotate the first flap 3 around the axis 4. The first flap 3 is shown in its neutral position in Fig. 1 in which the protruding part 5 extends along a longitudinal axis 21 of the fin body 2. Even though not shown, normally several pre-swirl fins are arranged in front of the propeller for guiding the fluid.
    The fin 1 is arranged on the stern boss 33 or hull of the vessel 31 upstream and in front of the propeller 30 for directing the water flow in an optimal angle, so that as less fuel as possible is used for driving the propeller 30 to move the vessel 31. By having an adjustable first flap 3 on the fin 1, the direction of the water flow can be changed, e.g. when leaving a harbour where the vessel 31 was loaded with more load than it carried when arriving to the harbour. Consequently, even less fuel is used in order to carry the load on board from one harbour to another since the inflow to the propeller 30 is optimised in relation to the present load on the vessel 31. When manufacturing prior art vessels 31, the fins 1 are fixedly mounted onto the side of the vessel 31 in a predetermined angle for guiding the inflow to the propeller 30 in a direction suitable for most loads and weather conditions. However, due to the fact that the load will change many times, and as will the weather, the inflow is not always optimal as compared to the load on board or the weather conditions under which the vessel 31 operates. Tests have shown that by regulating the inflow direction of fluid to the propeller 30, and thus rotate the first flap 3, less fuel is used for driving the propeller 30.
    In order to pressurise either the first chamber 7 or the second chamber 8, the fin 1 is fluidly connected with a pump 16 arranged in the vessel 31 in the vicinity of the propeller 30 wherein each chamber 7, 8 is fluidly connected with a pump 16 by means of hydraulic pipes 27.
    The fin body 2 of the fin 1 comprises a wall 9, and the first protruding part 5 abuts the wall 9, thereby dividing the fin body 2 into the first chamber 7 and the second chamber 8. The wall 9 may form part of the outer wall 35 of the fin body
    2. In Fig. 1, the wall 9 of the fin body 2 extends within the fin body 2 perpendicularly to the longitudinal axis 21.
    DK 2016 71012 A1
    In Fig. 2, a sealing means 22 is provided between the first flap 3 and the wall 9 of the fin body 2 for sealing the interior of the fin body 2. A sealing means 22 is also provided in one end 23 of the protruding part 5 to seal against the wall 9, thereby dividing the interior of the fin body 2 into the first chamber 7 and the second chamber 8. When fluid is injected into the first chamber 7, the fluid presses the protruding part 5 into the position shown in Fig. 2, and in this way the first flap 3 rotates around the axis 4 in order to change the inflow direction of the fluid to the propeller 30. Each chamber 7, 8 may be pressurised with liquid, such as seawater, so that if fluid leaks from the chambers 7, 8, the ocean is not polluted.
    The first actuation means 6, shown in Fig. 1, comprises a first expandable bag 11 and a second expandable bag 12, the first expandable bag 11 defining the first chamber 7 and the second expandable bag 12 defining the second chamber 8. Thus, the first expandable bag 11 encloses the first chamber 7 and the second expandable bag 12 encloses the second chamber 8. The first flap 3 is rotated from the position shown in Fig. 1 to the position shown in Fig. 3 by pressurising the second chamber 8 of the second expandable bag 12. Hereby, the first expandable bag 11 presses on one side of the protruding part 5, compressing the first expandable bag 11 and minimising the first chamber 7 accordingly. The pump 16 generating the pressurised fluid is arranged in the fin body 2 in a part of the fin body 2 furthest away from the first flap 3. The fin body 2 also comprises a motor 26 for driving the pump 16, and the motor 26 is electrically powered from a power supply (not shown) in the vessel 31. The fin 1 further comprises a position detector 17 configured to detect the position of the first flap
    3. The position detector 17 may be an encoder, a taco-pick-up, a rotary encoder, a distance sensor or other suitable detectors.
    In Fig. 1, the protruding part 5 is formed as a plate, and hereby the fluid acts on a greater area than if the protruding part 5 was pin-shaped. The first actuation means 6 is, hereby, capable of rotating the first flap 3 even though high forces acts on the first flap 3. The first expandable bag 11 and the second expandable bag 12 are an inflatable bladder 14 in Fig. 1. By having expandable bags 11, 12, the fluid for pressurising the first chamber 7 or the second chamber 8 may contain an anti-freeze additive.
    DK 2016 71012 A1
    The inflatable bladder 14 may have reinforcement means 28, as shown in Fig. 4, so that the inflatable bladder 14 does not deform during expansion of the inflatable bladder 14, and hereby the wall 9 extending perpendicularly to the longitudinal axis 21 of the fin body 2 is unnecessary for diminishing the free movement of the inflatable bladder 14.
    The fin 1 shown in Figs. 1 and 4 comprises a second flap 18 and a second actuation means 19 for rotating the second flap 18 separately from the first flap 3, and thus the second actuation means 19 has a second protruding part 20. The second actuation means 19 has the same design as the first actuation means 6, meaning that a first chamber 7 is arranged on one side of the second protruding part 20 and a second chamber 8 is arranged on the other side of the protruding part 20. The first chamber 7 is constituted by a first expandable bag 11 and the second chamber 8 is constituted by a second expandable bag 12, and both expandable bags 11, 12 are inflatable bladders 14. The first expandable bag 11 of the first actuation means 6 may be pressurised to move the first flap 3 upwards in a first direction, and the second expandable bag 12 of the second actuation means 19 may be pressurised to move the second flap 19 downwards in a second direction opposite the first direction. The first expandable bag 11 of the first actuation means 6 and the second expandable bag 12 of the second actuation means 19 may be pressurised using the same pump 16 and a hydraulic block 34 to control which chamber is pressurised.
    In Fig. 5, the first expandable bag 11 and the second expandable bag 12 are bellows 15, and the fin body 2 further comprises a first spring 36 and a second spring 37 arranged on each side of the first protruding part 5, so that if the pump 16, the motor 26 or the hydraulic block 34 fails, the first spring 36 and second springs 37 position the first flap 3 in the neutral position shown.
    In Fig. 6, the fin 1 further comprises a second actuation means 19 arranged between the first actuation means 6 and the first flap 3. The second actuation means 19 has a second protruding part 20 rotating around a second axis 43 and does not have any flap as a second body 62 replaces the flap 3 compared to Fig.
    2. Thus, the flap 3 is divided into two parts being the flap 3 itself and the second body 62. The fin 1 of Fig. 6, thus have a flap 3 divided in n flap parts where n is 2. The flap 3 could in another embodiment be divided in n=3,4,5 etc. The protruding part 5 of the first actuation means 6 and the protruding part 20 of the
    DK 2016 71012 A1 second actuation means 18 are moved by the chamber solution as illustrated in Fig. 2 and described in relation Fig. 2, so that each actuation means 6, 18 comprises a first chamber 7 and a second chamber 8 being inflatable bladders 14.
    The invention further relates to a vessel 31 comprising a propeller 30 and the described fin 1, where the fin 1 is arranged in front and upstream of the propeller 30 for guiding fluid to the propeller 30 in an optimal direction in relation to the load of the vessel 31, i.e. depending on how much cargo, containers etc. are on 10 board the vessel 31, and in relation to the draft and weather conditions. Thus, when leaving a harbour, the fin 1 may be adjusted in relation to weather forecast and the load on board the vessel 31.
    Although the invention has been described in the above in connection with 15 preferred embodiments of the invention, it will be evident for a person skilled in the art that several modifications are conceivable without departing from the invention as defined by the following claims.
    DK 2016 71012 A1
    权利要求:
    Claims (5)
    [1] 1/6

    [2] 2/6

    [3] 3/6

    [4] 4/6
    LD

    [5] 5/6

    m
    CD Ll.
    DK 2016 71012 A1
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    同族专利:
    公开号 | 公开日
    DK179432B1|2018-07-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2018-07-13| PAT| Application published|Effective date: 20180622 |
    2018-07-13| PME| Patent granted|Effective date: 20180713 |
    优先权:
    申请号 | 申请日 | 专利标题
    DKPA201671012A|DK179432B1|2016-12-21|2016-12-21|A pre-swirl fin|DKPA201671012A| DK179432B1|2016-12-21|2016-12-21|A pre-swirl fin|
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