• 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:
    Method and arrangement for the reduction of the resistance to rotation of the propeller (3) of a ship (1) going in ice when the ice increases the resistance to rotation of the propel- lerto a level higher than when sailing in open water. When the resistance to rotation increases, gas is passed to the propeller (3), and the supply of gas is adjusted when the resistance to rotation is changed. The supply of gas may be continual, but as a rule it is used only for short periods in order to correct the speed of rotation of the propeller to the appropriate level.
    公开号:SU1678199A3
    申请号:SU864028333
    申请日:1986-10-24
    公开日:1991-09-15
    发明作者:Калеви Хенрик Ярви Антти；Аксели Хейкинхеймо Юха；Вейкко Элиас Хирвонен Эркки
    申请人:Аквамастер-Раума Ой (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to shipbuilding and is applicable to icebreaking vessels.
    The purpose of the invention is to increase the efficiency of the method when the propeller operates in ice conditions.
    In figure 1 the stern of the vessel, the 1st option, side view; figure 2 - the same, the 2nd option; on fig.Z - propeller; 4 is the same, view A in FIG. 3; Fig, 5 - propeller in the nozzle, side view; figure 6 is the same, section bb in figure 5; FIG. 7 shows the stern of a vessel with a tunnel stern, side view.
    Resistance to rotation of the propeller of a ship moving in the ice, i.e. the torque opposite to the movement of the propeller increases, and the rotational speed of the propeller becomes lower when ice slows down the operational speed of the vessel and when pieces of ice fall into the propeller. When using a high power diesel engine to get the maximum power output from the engine, it is important that the rotational speed of the diesel engine connected to the propeller is not reduced. For this purpose, a gas is supplied to the suction surface of the propeller. Moreover, the gas supply can be increased when the resistance to rotation of the propeller caused by ice increases. As a result of gas supply to the propeller, it is possible to reduce the hydraulic resistance of the propeller, for example, by approximately 50 °. At the same time, the load on the propeller and the amount of water flowing through the propeller decreases, bla
    XI oo
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    with
    A year later, a smaller amount of ice causing resistance to the propeller enters the propeller along with the water.
    When gas is applied to the propeller, it is important to have most of the propeller blade surface on the suction side covered with gas. The gas bubble prevents the suction side of the blade from contacting water and ice and reduces negative pressure, thereby reducing propeller resistance. In the initial control stage, when the resistance decreases and when a gas bubble first forms, a sufficient amount of gas must be applied to the propeller. less than 0.5% and possibly at least 1% of the amount of water passing through the propeller. Even more gas may be required, for example 2%. After supplying gas to the propeller, it remains in contact with the blades, and the gas supply can be reduced to a level equal to the amount of gas leaking on the propeller. At this stage, the appropriate amount of gas may be about half the amount required at the beginning, or even less.
    The gas supply to the propeller can be designed in such a way that it will start, for example, when the power regulator of the vessel's drive motor is shifted beyond a certain limit, when the power hocrb starts to increase. The feed can also be controlled by a detector-sensor, which measures the rotational speed of the propeller and increases the feed when the rotational speed begins to be understood. The detector-sensor can also measure the torque of the propeller, in which case the gas supply starts when torque increases. Other types of sensor detectors, such as observing ice approaching, can also be used. In order for the gas to be quickly supplied to the propeller, and so that its effect can also be quickly stopped, the gas inlet point should be as close as possible to the propeller.
    Gas can be supplied either to the main propeller, or only to the propellers of the vessel, or also to the propeller propellers. In this connection, the main propeller means all those propellers whose power is at least half the power of the largest propeller of the vessel. The power of the propeller propellers is less than this power.
    In Fig. 1, in the stern of the vessel 1, the piping system 2 is installed so that air passes in front of and behind the propeller 3. The piping system 2 has valves 4 for controlling the amount of air. During the course, gas is supplied from the sternstep 5, from the blades of the propeller 3. On the reverse, gas is supplied from the leading edge of the roll 6. To supply gas to the piping system, the system is equipped with a fan 7 or a compressor. The system can also be equipped with a reservoir 8 with compressed air. Propeller is fully located at the same level as the WL waterline.
    Gas may be supplied from the engine supercharger 9 (Fig. 2). This is beneficial for engine operation. When the working power increases on the engine, the supercharger will make the engine more injected gas that cannot be used by the engine if the rotational speed drops.
    The pipelines pass through the propeller shaft 3 to the propeller hub 10.
    5 screws from which the channel holes 11 pass into each blade. Outlets 12 are provided from each channel opening.
    In figure 5 and 6, the propeller 3 is placed in the nozzle 13, installed on the hull
    0 1. The gas passes the rag 13 and the holes 14 open from it in front of the propeller, and the holes 15 behind the propeller. The propeller shaft support 3 is equipped with gas supply points 16,
    5 On a ship with a tunnel stern (Fig. 7),
    which is suitable for navigation in shallow waters, the lower part of the vessel is curved upwards above the propeller, so that a closed space 17 is formed, and the rowing
    0 screw 3 partially passes into this enclosed space. When gas is supplied to this space through the piping system 2, the propeller blades also carry air with it below the waterline level. Gas
    5 can be taken from ambient atmospheric air, and for negative pressure prevailing in a closed space, air is sucked into the space through a piping system 2
    0 without external pressure source, when valves 4 are open,
    The gas supply can be controlled automatically or manually. The gas may be supplied as such or as a mixture.
    5 gas and liquid. A gas or mixture of gas and liquid may also contain solid particles. Gas bubbles can also form near or near the propeller by applying a chemical that leads to the formation of gas in water, or by physical means, for example, by decomposing water when an electric current is passed through the water.
    权利要求:
    Claims (2)
    [1]
    1. A method of reducing the rotational resistance of a propeller of a ship, consisting in controlled supply of gas to the suction surfaces of the propeller blades, which differs from the fact that, in order to increase the efficiency of the method when the propeller operates in ice conditions,
    0
    a screw or a cool moment on the propeller shaft or ice is detected approaching the propeller, and gas is supplied respectively by decreasing the speed of rotation of the propeller shaft, or increasing the torque on the propeller shaft, or when ice approaches the propeller.
    [2]
    2. The method according to claim 1, characterized in that the volume gas supply is at least 0.25%, preferably 0.5% and in particular at least 1% of the volume flow of water flowing through the propeller at full power.
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    Ritter1972|Paper 20. Improvement of Control by Special Devices
    同族专利:
    公开号 | 公开日
    US4973275A|1990-11-27|
    NO864271D0|1986-10-24|
    EP0221443B1|1990-03-14|
    KR870003918A|1987-05-06|
    DE3669474D1|1990-04-19|
    FI74920C|1989-04-10|
    NO864271L|1987-04-27|
    JPS62103296A|1987-05-13|
    US5074813A|1991-12-24|
    FI854197A0|1985-10-25|
    EP0221443A1|1987-05-13|
    DK161953B|1991-09-02|
    FI74920B|1987-12-31|
    CA1293158C|1991-12-17|
    JP2547321B2|1996-10-23|
    FI854197L|1987-04-26|
    DK497786A|1987-04-26|
    DK497786D0|1986-10-17|
    DK161953C|1992-02-03|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE650590C|1937-09-25|Ludwig Kort Dipl Ing|Device to distribute the thrust more evenly over the whole propeller circle|
    US1007583A|1910-08-12|1911-10-31|Christian E Loetzer|Motor-boat.|
    US4188906A|1959-08-25|1980-02-19|Miller Marlin L|Supercavitating propeller with air ventilation|
    GB1261024A|1968-04-08|1972-01-19|Lips Nv|Method and means for minimizing the actuating forces of a controllable pitch propeller|
    FR2071402A5|1969-12-29|1971-09-17|Pastre De Bousquet R De|
    US3745964A|1971-08-19|1973-07-17|Outboard Marine Corp|Racing lower unit|
    SU461861A1|1971-11-22|1975-02-28|Центральный Научно-Исследовательский И Проектно-Конструкторский Институт Механизации И Энергетики Лесной Промышленности|Propulsion steering complex|
    JPS49111392A|1973-02-25|1974-10-23|
    US3924556A|1973-04-09|1975-12-09|Schottel Werft|Device for reducing the thrust of steerable propellers|
    SE377919B|1973-04-10|1975-08-04|Karlstad Mekaniska Ab|
    JPS5950557B2|1977-04-26|1984-12-08|Kawasaki Heavy Ind Ltd|
    JPS6114997B2|1978-12-21|1986-04-22|Mitsubishi Heavy Ind Ltd|
    JPS5528639Y2|1979-09-20|1980-07-08|
    US4383829A|1979-10-25|1983-05-17|Great Lakes Power Products, Inc.|Drive assembly for inboard speedboat|
    DE3129232A1|1981-07-24|1983-02-10|Herbert 6927 Bad Rappenau Wunschik|Propeller|
    JPS5942796U|1982-09-13|1984-03-21|
    JPS5957092A|1982-09-28|1984-04-02|Mitsubishi Heavy Ind Ltd|Reducer for propeller exciting force|
    JPS6047792A|1983-08-26|1985-03-15|Shigeo Shindo|Overload preventing method of fishing boat engine|
    FI74920C|1985-10-25|1989-04-10|Rauma Repola Oy|FOERFARANDE OCH SYSTEM FOER ATT MINSKA ROTATIONSMOTSTAONDET I PROPELLER.|FI74920C|1985-10-25|1989-04-10|Rauma Repola Oy|FOERFARANDE OCH SYSTEM FOER ATT MINSKA ROTATIONSMOTSTAONDET I PROPELLER.|
    FI82653C|1987-04-24|1991-04-10|Antti Kalevi Henrik Jaervi|FOERFARANDE OCH ANORDNINGAR FOER AVLAEGSNANDE AV IS FRAON RAENNA.|
    GB8709003D0|1987-04-27|1987-05-20|British Gas Plc|Apparatus for cutting under water|
    JPH0549598U|1991-12-17|1993-06-29|川崎重工業株式会社|Air blowout hole structure of marine propeller blades|
    FI97351C|1993-11-22|1996-12-10|Kvaerner Masa Yards Oy|The silencing|
    FI107040B|1997-07-31|2001-05-31|Kvaerner Masa Yards Oy|Method of operation of the work vessel|
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    WO2002038441A1|2000-11-08|2002-05-16|Duelger Fikret|Stern unit for marine craft|
    DE10135474B4|2001-07-20|2005-10-20|Kvaerner Warnow Werft Gmbh|ship|
    NO20045623D0|2004-12-23|2004-12-23|Goldfish Technology As|Hydrodynamic cavitation coupling|
    JP5101210B2|2007-08-16|2012-12-19|三菱重工業株式会社|Ship propulsion device|
    SE0702129L|2007-09-25|2009-03-26|Stormfaageln Ab|Boat Propeller|
    KR101482918B1|2008-04-01|2015-01-16|내셔널 매리타임 리서치 인스티튜트|Frictional resistance reduction device for ship|
    US20130040513A1|2011-08-12|2013-02-14|Zuei-Ling Lin|Hydraulic propeller enhancement method|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FI854197A|FI74920C|1985-10-25|1985-10-25|FOERFARANDE OCH SYSTEM FOER ATT MINSKA ROTATIONSMOTSTAONDET I PROPELLER.|
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