PROBLEM TO BE SOLVED: To solve a problem in the ballast adjustment of a hull in which: conventionally a ship raises wave-making from bows, and a submerged section of a hull ship bottom section and a ship side section receives frictional resistance; particularly, a resistance component of a bow section or the amount of resistance increases with the rise of a ship speed by a dynamic pressure; and a navigation speed is limited in terms of an economic viewpoint by both total resistance amounts.SOLUTION: An amount of dynamic pressure resistance received by a bow section is greatly reduced. By this function, a conventionally limited economical speed can be raised easily. The submerged section of a ship bottom section and a ship side section has contact friction resistance related to a water flow speed. In the case of a conventional ship, a contact friction factor is a factor value in a range of 0.04-0.05 as a dynamic friction coefficient, and it is reduced to 0.00152-0.0001, thereby the result reduces necessary horse-power of a propulsion system. Economical efficiency of navigation is greatly increased. Conventionally, a ballast adjusting device of a hull and the complexity of operation are solved by injecting a nitrogen gas and an air pressure into double ship side/ship bottom structures, particularly in the ship bottom structure section.
【課題】従来船は船首から造波を起し。船体船底部、舷側部の没水部は摩擦抵抗を受けている。特に船首部の抵抗成分は動圧力で船速度の上昇と共に抵抗量は増大し、両合計抵抗力量により航行速度は経済的観点から制限されている。船体のバラスト調整には問題がある。【解決手段】船首部が受けていた動圧抵抗量を大幅に低減させる。この機能により従来より制限されていた経済速度を上昇させる事が安易に出来る。船底部、舷側部の没水部は水流速度に関係した接触摩擦抵抗であり従来船の場合接触摩擦係数は動摩擦係数として0.04〜0.05の係数値であったのを、0.00152〜0.0001にとした、この成果は推進機関の必要馬力を少なくさせる。運航経済性を抜群な物とさせる。従来から船体のバラスト調整装置や作動の煩雑を、2重船側・船底構造、特に船底構造部に窒素ガスと空気圧の抽入により解決させる。【選択図】図2
STEERING GEAR OF HULL BOW INSTALLATION, FRICTION REDUCING DEVICE IN HULL WATERLINE BOTTOM AND HULL BALLAST ADJUSTING FUNCTION
船体船首部設置の操舵装置。船体喫水線下摩擦低減化装置。船体バラスト調整機能。
2015-06-04
Patent
Electronic Resource
Japanese
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