JP5030080B2 - Hull frictional resistance reduction device - Google Patents

Hull frictional resistance reduction device Download PDF

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JP5030080B2
JP5030080B2 JP2006188385A JP2006188385A JP5030080B2 JP 5030080 B2 JP5030080 B2 JP 5030080B2 JP 2006188385 A JP2006188385 A JP 2006188385A JP 2006188385 A JP2006188385 A JP 2006188385A JP 5030080 B2 JP5030080 B2 JP 5030080B2
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hull
pressure gas
ship
compartment
gas supply
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JP2008013128A (en
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英幹 川島
宗彦 日夏
良明 児玉
久宣 川島
利文 堀
雅彦 牧野
将史 大縄
我行 迫田
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National Maritime Research Institute
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T70/00—Maritime or waterways transport
    • Y02T70/10—Measures concerning design or construction of watercraft hulls

Description

本発明は、航行中の船体の船底部外面に沿う水の摩擦抵抗を低減させるための装置に関する。   The present invention relates to a device for reducing the frictional resistance of water along the outer surface of the bottom of a hull during navigation.

航行中の船舶では、一般に船底部の没水表面に水の摩擦抵抗を受けており、特に大型船の場合には船体抵抗の大部分が船底部における外水の相対流により生じる摩擦抵抗で占められている。
そこで、航行時に船底面を気泡流で覆うことにより船体摩擦抵抗の低減を図る技術が、古くから提案されている。
特許第３６９２３９８号公報 特開２００２−６８０７３号公報 In navigating vessels, the submerged surface of the bottom of the ship generally receives frictional resistance of water, and in the case of large ships in particular, most of the hull resistance is occupied by the frictional resistance generated by the relative flow of outside water at the bottom of the ship. It has been.
Therefore, a technique for reducing the hull frictional resistance by covering the bottom of the ship with a bubble flow during navigation has been proposed for a long time.
Japanese Patent No. 3692398 JP 2002-68073 A

一般に、船舶は航行中に風や波浪により船体の動揺を生じやすく、このため摩擦抵抗低減用の気泡で常時船底面を一様に包むことは困難とされ、特に船側に近い船底面では、船体の横揺れに伴い傾斜して上昇した際に、気泡が船体から離れてしまうという不具合がある。
また、船底部の全面にわたって気泡噴出口を設けることは、大幅なコスト上昇を招くことになる。
そこで、本発明は、船底部の船体外板面から気泡を噴出するため船幅方向に設けられる局部的な気体室の配置を、船長方向に分散して行うとともに、各気体室を船幅方向にわたって複数の分室に分割することにより、船体の横揺れの際の各分室に対する高圧気体の供給を適切に行えるようにして、気泡発生用の高圧気体の供給の合理化を図りながら、航走時における船体の摩擦抵抗の低減を十分に行えるようにした装置を提供することを課題とする。 In general, a ship is likely to be shaken by wind and waves during navigation, so it is difficult to always wrap the bottom of the ship uniformly with bubbles for reducing frictional resistance, especially on the bottom of the ship close to the ship side. There is a problem that the bubbles are separated from the hull when they are tilted and lifted along with the rolling motion.
In addition, providing the bubble ejection port over the entire surface of the ship bottom causes a significant cost increase.
Therefore, the present invention performs the arrangement of the local gas chambers provided in the ship width direction in order to eject air bubbles from the hull outer plate surface of the bottom of the ship, and distributes each gas chamber in the ship width direction. In order to streamline the supply of high-pressure gas for generating bubbles, it is possible to appropriately supply high-pressure gas to each compartment when the hull rolls. It is an object of the present invention to provide an apparatus that can sufficiently reduce the frictional resistance of a hull.

本発明の船体摩擦抵抗低減装置は、船底部の幅方向にわたり船内に形成される複数の気体室が、船長方向に分散するように配設されて、上記気体室は上記船底部の幅方向にわたって複数の分室に分割されており、上記分室に対応する上記船底部の船体外板部分には多数の気泡噴出口が形成されるとともに、上記複数の分室へコンプレッサからそれぞれバルブを介して通じる高圧気体供給管が船内に配設され、航行中に上記気泡噴出口から噴出し上記船底部の船体外板部分の外面に沿って流れる気泡の分布の均一化を図るべく、上記船体の横揺れセンサと、同横揺れセンサで検出される船体横傾斜角に基づいて上記分室への高圧気体供給を制御する高圧気体供給制御系とが設けられ、航行中における上記船体の対水速度に応じて上記気泡噴出口からの気泡噴出量を制御すべく、上記高圧気体供給制御系が船速計で検出された船速に基づき上記分室へ供給される高圧気体供給量を上記バルブの開度により調整できるように設定されていることを特徴としている。 In the hull frictional resistance reduction device of the present invention, a plurality of gas chambers formed in the ship over the width direction of the ship bottom are arranged so as to be dispersed in the ship length direction, and the gas chamber extends over the width direction of the ship bottom. High-pressure gas that is divided into a plurality of compartments, and that has a number of bubble jets formed in the hull outer plate portion of the bottom of the ship corresponding to the compartments, and that leads to the compartments from the compressor via valves, respectively. A supply pipe is provided in the ship, and in order to make uniform the distribution of bubbles that flow out along the outer surface of the hull skin plate at the bottom of the ship, A high-pressure gas supply control system that controls supply of high-pressure gas to the compartment based on a hull lateral inclination angle detected by the roll sensor, and the bubbles according to the water velocity of the hull during navigation Spout The high-pressure gas supply control system is set so that the amount of high-pressure gas supplied to the compartment can be adjusted by the opening of the valve based on the ship speed detected by the ship speedometer. It is characterized by being.

また、本発明の船体摩擦抵抗低減装置は、上記高圧気体供給制御系が、上記横揺れセンサで検出される船体横傾斜角に基づいて、上記船体の横傾斜により喫水の浅くなる側の上記分室への高圧気体供給量を喫水の深くなる側の上記分室への高圧気体供給量よりも減少させるように上記バルブの開度を制御すべく構成されていることを特徴としている。   Further, in the hull frictional resistance reduction device according to the present invention, the high pressure gas supply control system is configured such that the chamber on the side where the draft becomes shallow due to the horizontal tilt of the hull based on the horizontal tilt angle of the hull detected by the roll sensor. It is characterized by controlling the opening degree of the valve so that the amount of high-pressure gas supplied to the water is reduced more than the amount of high-pressure gas supplied to the compartment on the deeper side of the draft.

さらに、本発明の船体摩擦抵抗低減装置は、上記高圧気体供給制御系が、上記船体の横傾斜の際に、喫水の最も浅くなる側の上記分室への高圧気体供給を停止すべく、同分室に対応する上記バルブを閉じるように設定されていることを特徴としている。   Further, in the hull frictional resistance reduction device of the present invention, the high-pressure gas supply control system is configured to stop the high-pressure gas supply to the branch chamber on the side where the draft is shallowest when the hull is tilted sideways. It is characterized by setting so that the said valve | bulb corresponding to may be closed.

さらに、本発明の船体摩擦抵抗低減装置は、航行中における上記船体の対水速度に応じて上記気泡噴出口からの気泡噴出量を制御すべく、船速計で検出された船速に基づき上記分室へ供給される高圧気体供給量を上記コンプレッサの制御により調整するためのコンプレッサ制御系が設けられたことを特徴としている。   Furthermore, the hull frictional resistance reduction device of the present invention is based on the ship speed detected by the ship speedometer to control the amount of bubble ejection from the bubble ejection port according to the water velocity of the hull during navigation. A compressor control system for adjusting the amount of high-pressure gas supplied to the compartment by controlling the compressor is provided.

本発明の船体摩擦抵抗低減装置では、船底部の幅方向にわたり船内に形成される気体室が船長方向に分散するように配設されて、各気体室は船底部の幅方向にわたり複数の分室に分割されるとともに、各分室に対応する上記船底部の船体外板部分に多数の気泡噴出口が形成され、各分室にはコンプレッサからそれぞれバルブを介して通じる高圧気体供給管が接続されるので、航行中の船体の船底部外面は、上記分室に対応する船体外板に形成された多数の気泡噴出口から噴出される微細な気泡によって適切に覆われるようになる。 In the hull frictional resistance reduction device of the present invention, gas chambers formed in the ship over the width direction of the ship bottom are arranged so as to be dispersed in the ship length direction, and each gas chamber is divided into a plurality of compartments over the width direction of the ship bottom. As it is divided, a large number of bubble jets are formed in the hull outer plate portion of the ship bottom corresponding to each compartment, and each compartment is connected to a high-pressure gas supply pipe that leads from the compressor via a valve, The outer surface of the bottom portion of the hull that is being navigated is appropriately covered with fine bubbles that are ejected from a large number of bubble outlets formed in the hull outer plate corresponding to the compartment.

そして、上記分室への高圧気体の供給は、船体の横揺れセンサで検出される船体横傾斜角に基づき高圧気体供給制御系で制御されることにより、波浪中の航行に際して船体が大きく横揺れする際にも、上記気泡噴出口から噴出し船底部外面に沿って流れる気泡の分布の均一化がもたらされるようになる。
また、船舶の対水速度が小さい場合は船体の外水による摩擦抵抗も小さくなるので、航行中における船体の対水速度に応じて上記気泡噴出口からの気泡噴出量を制御できるように、上記高圧気体供給制御系が船速計で検出された船速に基づき上記分室へ供給される高圧気体供給量を上記バルブの開度により調整できるように設定されているため、船速の低い場合は気泡の噴出を抑制できるようにして高圧気体供給量の節減を図ることができる。 The supply of the high-pressure gas to the compartment is controlled by the high-pressure gas supply control system based on the hull lateral inclination angle detected by the hull roll sensor, so that the hull greatly rolls during navigation in the waves. At the same time, the distribution of bubbles flowing from the bubble outlet and flowing along the outer surface of the bottom of the ship is made uniform.
Also, when the water velocity of the ship is small, the frictional resistance due to the outside water of the hull is also reduced, so that the amount of bubble ejection from the bubble outlet can be controlled according to the water velocity of the hull during navigation. The high-pressure gas supply control system is set so that the amount of high-pressure gas supplied to the compartment can be adjusted by the opening of the valve based on the ship speed detected by the ship speedometer. It is possible to reduce the amount of high-pressure gas supply by suppressing the ejection of bubbles.

また、上記高圧気体供給制御系が、上記横揺れセンサで検出される船体横傾斜角に基づいて、上記船体の横傾斜により喫水の浅くなる側の上記分室への高圧気体供給量を喫水の深くなる側の上記分室への気体供給量よりも減少させるように、上記バルブの開度制御を行うことにより、船底部を覆うための気泡の配分が無駄なく適切に行われるようになる。   Further, the high-pressure gas supply control system determines the amount of high-pressure gas supplied to the compartment on the side where the draft becomes shallow due to the lateral inclination of the hull based on the horizontal inclination angle detected by the roll sensor. By controlling the opening of the valve so as to reduce the amount of gas supplied to the compartment on the other side, the distribution of bubbles for covering the bottom of the ship is appropriately performed without waste.

さらに、上記高圧気体供給制御系が、上記船体の横傾斜の際に、喫水の最も浅くなる側の上記分室への高圧気体供給を停止するため同分室に対応する上記バルブを閉じるように設定されていると、航行中の船舶の旋回時などに船体が大きく横傾斜した際にも、船底部外面への気泡の配分が無駄なく適切に行われるようになる。   Further, the high-pressure gas supply control system is set to close the valve corresponding to the branch chamber in order to stop the high-pressure gas supply to the branch chamber on the side where the draft is shallowest when the hull is inclined sideways. In this case, even when the hull is largely inclined at the time of turning of the marine vessel that is being navigated, the bubbles are appropriately distributed to the outer surface of the bottom of the vessel without waste.

さらに、航行中における船体の対水速度に応じて上記気泡噴出口からの気泡噴出量を制御できるように、船速計で検出された船速に基づき、上記分室へ供給される高圧気体供給量を上記コンプレッサの制御により調整するためのコンプレッサ制御系が設けられている場合も、船速の低いときに気泡の噴出を抑制して、高圧気体供給量の節減を図ることができる。   Further, the amount of high-pressure gas supplied to the compartment based on the ship speed detected by the ship speedometer so that the amount of bubble jet from the bubble outlet can be controlled according to the water velocity of the hull during navigation. Even when a compressor control system is provided for adjusting the air pressure by controlling the compressor, it is possible to reduce the amount of high-pressure gas supply by suppressing the ejection of bubbles when the boat speed is low.

図１は本発明の一実施例としての船体摩擦抵抗低減装置を備えた船舶の側面図、図２は図１のＡ−Ａ矢視線における船体横断面図、図３は図２のＢ部の拡大図、図４は上記装置の制御系を示す系統図である。   1 is a side view of a ship equipped with a hull frictional resistance reducing device as one embodiment of the present invention, FIG. 2 is a cross-sectional view of the hull taken along the line AA in FIG. 1, and FIG. FIG. 4 is a system diagram showing a control system of the above apparatus.

図１，２に示すように、大型船としての船舶の船底部１において、図２に示すごとく幅方向にわたり船内に形成される気体室２が、図１に示すごとく船長方向に分散するように複数（本実施例では４個）配設されている。   As shown in FIGS. 1 and 2, in the bottom 1 of the ship as a large ship, the gas chambers 2 formed in the ship over the width direction as shown in FIG. 2 are dispersed in the ship length direction as shown in FIG. A plurality (four in this embodiment) are arranged.

各気体室２は船底部１の幅方向にわたって多数の分室２ａに分割されており、図３に示すように各分室２ａに対応する船体外板部分１ａには、多数の気泡噴出口１ｂが形成されている。なお、この船体外板部分１ａには、多孔質板を採用するようにしてもよい。特に、多数のステンレス金網を重ね合わせて焼結した多孔質板としてのステンレス焼結金網を船底外板部分１ａに用いると、十分な強度および耐久性を確保することができる。 Each gas chamber 2 is divided into a number of compartments 2a over the width direction of the ship bottom 1, and a large number of bubble outlets 1b are formed in the hull outer plate portion 1a corresponding to each compartment 2a as shown in FIG. Has been. Note that this hull shell portion 1a, may be adopted a porous plate. In particular, when a stainless sintered wire mesh as a porous plate obtained by laminating and sintering a large number of stainless steel wire meshes is used for the ship bottom outer plate portion 1a, sufficient strength and durability can be ensured.

また、図３，４に示すように、各分室２ａへ通じる高圧気体供給管３が船内に配設され、各気体供給管３には、図４に示すように、バルブ５および流量計６が介装されていて、その本管３Ａは元栓７を介しコンプレッサ（本実施例ではエア・コンプレッサ）８に接続されている。   As shown in FIGS. 3 and 4, high-pressure gas supply pipes 3 leading to the respective compartments 2a are arranged in the ship, and each gas supply pipe 3 has a valve 5 and a flow meter 6 as shown in FIG. The main pipe 3A is connected to a compressor (in this embodiment, an air compressor) 8 through a main plug 7.

そして、航行中に気泡噴出口１ｂから噴出し船底部１の外面に沿って流れる気泡ｂの分布の均一化を図れるように、図４に示すごとく、船体の横揺れセンサ９と、同横揺れセンサ９で検出される船体横傾斜角に基づいて分室２ａへの高圧気体供給量を制御する高圧気体供給制御系10とが設けられている。   Then, as shown in FIG. 4, as shown in FIG. 4, the roll sensor 9 of the hull and the roll of the hull can be made uniform so that the distribution of the bubbles b flowing from the bubble outlet 1 b and flowing along the outer surface of the ship bottom 1 can be made uniform. A high-pressure gas supply control system 10 is provided for controlling the amount of high-pressure gas supplied to the compartment 2 a based on the hull lateral inclination angle detected by the sensor 9.

すなわち、高圧気体供給制御系10は、横揺れセンサ９からの検出情報に基づき、船体の横傾斜の際に、喫水の浅くなる側の分室２ａへの高圧気体供給量を、喫水の深くなる側の分室２ａへの高圧気体供給量よりも減少させるべく、バルブ５の開度を制御できるように構成されている。 That is, the high-pressure gas supply control system 10 determines the amount of high-pressure gas supplied to the compartment 2a on the side where the draft becomes shallower when the hull is tilted based on the detection information from the roll sensor 9 on the side where the draft becomes deeper. of order to reduce than the high-pressure gas-body supply amount to the compartment 2a, and is configured to be able to control the opening degree of the valve 5.

また、高圧気体供給制御系10は、横揺れセンサ９からの検出情報に基づき、船体の横傾斜の際に、喫水の最も浅くなる側の分室２ａへの高圧気体供給を停止すべく、同分室２ａに対応するバルブ５を閉じるように設定されている。   Further, the high-pressure gas supply control system 10 is based on the detection information from the roll sensor 9 so as to stop the high-pressure gas supply to the compartment 2a on the side where the draft is the shallowest when the hull is inclined. The valve 5 corresponding to 2a is set to be closed.

さらに、航行中における船体の対水速度に応じて気泡噴出口１ｂからの気泡噴出量を制御できるように、高圧気体供給制御系10が船速計11で検出された船速に基づき分室２ａへ供給される高圧気体供給量をバルブ５の開度によって調節できるように設定されている。   Further, the high-pressure gas supply control system 10 moves to the compartment 2a based on the ship speed detected by the ship speedometer 11 so that the amount of bubble injection from the bubble outlet 1b can be controlled according to the water velocity of the hull during navigation. The high-pressure gas supply amount to be supplied is set so as to be adjusted by the opening degree of the valve 5.

また、航行中における船体の対水速度に応じて、気泡噴出口１ｂからの気泡噴出量を制御できるように、船速計11で検出された船速に基づき分室２ａへ供給される高圧気体供給量をコンプレッサ８の制御により調節するためのコンプレッサ制御系12も設けられている。   In addition, the high-pressure gas supply supplied to the compartment 2a based on the ship speed detected by the ship speedometer 11 so that the amount of air bubbles ejected from the air bubble outlet 1b can be controlled according to the water speed of the hull during navigation. A compressor control system 12 for adjusting the amount by controlling the compressor 8 is also provided.

上述の本実施例の船体摩擦抵抗低減装置では、船底部１の幅方向にわたり船内に形成される気体室２が船長方向に分散するように配設されて、各気体室２は船底部１の幅方向にわたり複数の分室２ａに分割されるとともに、各分室２ａに対応する船体外板部分１ａに多数の気泡噴出口１ｂが形成され、各分室２ａにはコンプレッサ８からそれぞれバルブ５を介して通じる高圧気体供給管３が接続されるので、航行中の船体の船底部１の外面は、分室２ａに対応する船体外板部分１ａに形成された多数の気泡噴出口１ｂから噴出される微細な気泡ｂによって適切に覆われるようになる。 In the above-described hull frictional resistance reduction device of the present embodiment, the gas chambers 2 formed in the ship over the width direction of the ship bottom portion 1 are arranged so as to be dispersed in the ship length direction. While being divided into a plurality of compartments 2a over the width direction, a large number of bubble jets 1b are formed in the hull outer plate portion 1a corresponding to each compartment 2a, and each compartment 2a is connected to each compartment 2a via a valve 5 respectively. Since the high-pressure gas supply pipe 3 is connected, the outer surface of the ship bottom 1 of the sailing hull is fine bubbles ejected from a number of bubble outlets 1b formed in the hull outer plate portion 1a corresponding to the compartment 2a. It will be properly covered by b.

そして、分室２ａへの高圧気体の供給は、船体の横揺れセンサ９で検出される船体横傾斜角に基づき高圧気体供給制御系10で制御されることにより、波浪中の航行に際して船体が大きく横揺れする際にも、気泡噴出口１ｂから噴出し船底部外面に沿って流れる気泡の分布の均一化がもたらされるようになる。   The supply of the high-pressure gas to the compartment 2a is controlled by the high-pressure gas supply control system 10 on the basis of the hull lateral inclination angle detected by the hull roll sensor 9, so that the hull greatly sways during navigation in the waves. Even when shaking, the distribution of bubbles flowing from the bubble outlet 1b and flowing along the outer surface of the bottom of the ship is made uniform.

また、高圧気体供給制御系が10、横揺れセンサ９で検出される船体横傾斜角に基づいて、船体の横傾斜により喫水の浅くなる側の分室２ａへの高圧気体供給量を喫水の深くなる側の分室２ａへの気体供給量よりも減少させるように、バルブ５の開度制御を行うことにより、船底部を覆うための気泡の配分が無駄なく適切に行われるようになる。   Further, the high-pressure gas supply control system is 10, and based on the hull lateral inclination angle detected by the roll sensor 9, the high-pressure gas supply amount to the compartment 2a on the side where the draft becomes shallower due to the horizontal inclination of the hull becomes deeper. By controlling the opening of the valve 5 so as to reduce the amount of gas supplied to the side compartment 2a, the distribution of bubbles for covering the bottom of the ship can be appropriately performed without waste.

さらに、高圧気体供給制御系10が、船体の横傾斜の際に、喫水の最も浅くなる側の分室２ａへの高圧気体供給を停止するため同分室２ａに対応するバルブ５を閉じるように設定されていると、航行中の船舶の旋回時などに船体が大きく横傾斜した際にも、船底部外面への気泡ｂの配分が無駄なく適切に行われるようになる。   Further, the high-pressure gas supply control system 10 is set so as to close the valve 5 corresponding to the same compartment 2a in order to stop the supply of the high-pressure gas to the compartment 2a on the side where the draft becomes the shallowest when the hull is inclined sideways. In this case, even when the hull is largely tilted when the vessel is turning, the air bubbles b are appropriately distributed to the outer surface of the bottom of the vessel without waste.

また、船舶の対水速度が小さい場合は船体の摩擦抵抗も小さくなるので、航行中における船体の対水速度に応じて気泡噴出口１ｂからの気泡噴出量を制御できるように、高圧気体供給制御系10が船速計11で検出された船速に基づき、分室２ａへ供給される高圧気体供給量をバルブ５の開度により調整できるように設定されていると、船速の低い場合は気泡の噴出を抑制できるようにして高圧気体供給量の節減を図ることができる。   Further, since the frictional resistance of the hull is reduced when the water velocity of the ship is low, the high-pressure gas supply control is performed so that the amount of bubble ejection from the bubble outlet 1b can be controlled according to the water velocity of the hull during navigation. If the system 10 is set so that the amount of high-pressure gas supplied to the compartment 2a can be adjusted by the opening of the valve 5 based on the ship speed detected by the ship speedometer 11, bubbles are generated when the ship speed is low. The amount of high-pressure gas supply can be reduced by suppressing the ejection of gas.

さらに、航行中における船体の対水速度に応じて気泡噴出口１ｂからの気泡噴出量を制御できるように、船速計11で検出された船速に基づき、分室２ａへ供給される高圧気体供給量をコンプレッサ８の制御により調整するためのコンプレッサ制御系12が設けられている場合も、船速の低いときに気泡の噴出を抑制して、高圧気体供給量の節減を図ることができる。   Further, a high-pressure gas supply supplied to the compartment 2a based on the ship speed detected by the ship speedometer 11 so that the amount of bubble injection from the bubble outlet 1b can be controlled according to the water velocity of the hull during navigation. Even when the compressor control system 12 for adjusting the amount by the control of the compressor 8 is provided, it is possible to reduce the amount of high-pressure gas supply by suppressing the ejection of bubbles when the boat speed is low.

本発明の一実施例としての船体摩擦抵抗低減装置を備えた船舶の側面図である。It is a side view of the ship provided with the hull frictional resistance reduction apparatus as one Example of this invention. 図１のＡ−Ａ矢視線における船体横断面図である。FIG. 2 is a transverse cross-sectional view of the hull taken along line AA in FIG. 1. 図２のＢ部の拡大図である。It is an enlarged view of the B section of FIG. 上記装置の制御系を示す系統図である。It is a systematic diagram which shows the control system of the said apparatus.

１ 船底部
１ａ 船体外板部分
１ｂ 気泡噴出口
２ 気体室
２ａ 分室
３ 高圧気体供給管
３Ａ 本管
５ バルブ
６ 流量計
７ 元栓
８ コンプレッサ
９ 横揺れセンサ
10 高圧気体供給制御系
11 船速計
12 コンプレッサ制御系
ｂ 気泡 DESCRIPTION OF SYMBOLS 1 Ship bottom part 1a Hull outer plate part 1b Bubble outlet 2 Gas chamber 2a Branch 3 High pressure gas supply pipe 3A Main pipe 5 Valve 6 Flow meter 7 Main plug 8 Compressor 9 Roll sensor
10 High-pressure gas supply control system
11 Ship speedometer
12 Compressor control system b Air bubbles

Claims (4)

船底部の幅方向にわたり船内に形成される複数の気体室が、船長方向に分散するように配設されて、上記気体室は上記船底部の幅方向にわたって複数の分室に分割されており、上記分室に対応する上記船底部の船体外板部分には多数の気泡噴出口が形成されるとともに、上記複数の分室へコンプレッサからそれぞれバルブを介して通じる高圧気体供給管が船内に配設され、航行中に上記気泡噴出口から噴出し上記船底部の上記船体外板部分の外面に沿って流れる気泡の分布の均一化を図るべく、上記船体の横揺れセンサと、同横揺れセンサで検出される船体横傾斜角に基づいて上記分室への高圧気体供給を制御する高圧気体供給制御系とが設けられ、航行中における上記船体の対水速度に応じて上記気泡噴出口からの気泡噴出量を制御すべく、上記高圧気体供給制御系が船速計で検出された船速に基づき上記分室へ供給される高圧気体供給量を上記バルブの開度により調整できるように設定されていることを特徴とする、船体摩擦抵抗低減装置。 A plurality of gas chambers formed in the ship over the width direction of the ship bottom are disposed so as to be dispersed in the ship length direction, and the gas chamber is divided into a plurality of compartments over the width direction of the ship bottom, A large number of air bubble outlets are formed in the hull skin of the ship bottom corresponding to the compartments, and high-pressure gas supply pipes that are connected to the plurality of compartments from the compressors via valves are arranged in the ship for navigation. In order to make uniform the distribution of bubbles that blow out from the bubble outlet and flow along the outer surface of the hull skin plate part of the bottom of the ship, the hull roll sensor and the roll sensor detect the same. A high-pressure gas supply control system that controls the supply of high-pressure gas to the compartment based on the horizontal inclination angle of the hull is provided , and the amount of bubble ejection from the bubble outlet is controlled according to the water velocity of the hull during navigation As much as possible Characterized in that the high-pressure gas supply control system is set to a high pressure gas supply amount supplied to said compartment based on the boat speed detected by the boat speed meter so as to adjust the opening degree of the valve, the hull Friction resistance reduction device. 上記高圧気体供給制御系が、上記横揺れセンサで検出される船体横傾斜角に基づいて、上記船体の横傾斜により喫水の浅くなる側の上記分室への高圧気体供給量を喫水の深くなる側の上記分室への高圧気体供給量よりも減少させるように上記バルブの開度を制御すべく構成されていることを特徴とする、請求項１に記載の船体摩擦抵抗低減装置。   The high-pressure gas supply control system is configured such that, based on the hull lateral inclination angle detected by the roll sensor, the amount of high-pressure gas supplied to the compartment on the side where the draft becomes shallow due to the horizontal inclination of the hull becomes the side where the draft becomes deeper. The hull frictional resistance reduction device according to claim 1, wherein the opening degree of the valve is controlled so as to be less than the amount of high-pressure gas supplied to the compartment. 上記高圧気体供給制御系が、上記船体の横傾斜の際に、喫水の最も浅くなる側の上記分室への高圧気体供給を停止すべく、同分室に対応する上記バルブを閉じるように設定されていることを特徴とする、請求項２に記載の船体摩擦抵抗低減装置。   The high-pressure gas supply control system is set to close the valve corresponding to the same compartment in order to stop the high-pressure gas supply to the compartment on the side where the draft is shallowest when the hull is inclined sideways. The hull frictional resistance reduction device according to claim 2, wherein 航行中における上記船体の対水速度に応じて上記気泡噴出口からの気泡噴出量を制御すべく、船速計で検出された船速に基づき上記分室へ供給される高圧気体供給量を上記コンプレッサの制御により調整するためのコンプレッサ制御系が設けられたことを特徴とする、請求項１〜３のいずれか１つに記載の船体摩擦抵抗低減装置。 In order to control the amount of air bubbles ejected from the air bubble outlet according to the water velocity of the hull during navigation, the compressor supplies the amount of high-pressure gas supplied to the compartment based on the ship speed detected by the ship speedometer. The hull frictional resistance reduction device according to any one of claims 1 to 3 , further comprising a compressor control system for adjustment by the control.
JP2006188385A 2006-07-07 2006-07-07 Hull frictional resistance reduction device Expired - Fee Related JP5030080B2 (en)

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JP5311565B2 (en) * 2009-03-27 2013-10-09 独立行政法人海上技術安全研究所 Method and apparatus for reducing marine frictional resistance
JP5604736B2 (en) * 2008-04-01 2014-10-15 独立行政法人海上技術安全研究所 Ship frictional resistance reduction device
JP5403648B2 (en) * 2008-07-17 2014-01-29 独立行政法人海上技術安全研究所 Ship jet gas supply method and jet gas control device
EP2272747B1 (en) * 2008-04-01 2019-05-08 National Institute of Maritime, Port and Aviation Technology Frictional resistance reduction device for ship
JP5631039B2 (en) * 2010-04-01 2014-11-26 三菱重工業株式会社 Propeller vibration reduction device
JP5797418B2 (en) * 2011-02-15 2015-10-21 国立研究開発法人海上技術安全研究所 Bubble blowing device for reducing frictional resistance of ships
JP5581369B2 (en) * 2012-12-07 2014-08-27 株式会社大島造船所 Air lubrication device and ship
JP5669113B2 (en) * 2013-06-28 2015-02-12 独立行政法人海上技術安全研究所 Ship frictional resistance reduction device
CN110758634A (en) * 2019-11-11 2020-02-07 中船重工（上海）节能技术发展有限公司 Ship gas lubrication resistance reduction system and ship

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6181283A (en) * 1984-09-27 1986-04-24 Mitsubishi Heavy Ind Ltd Vessel having reduced frictional resistance
JPS62108098U (en) * 1985-12-27 1987-07-10
JPS61232982A (en) * 1986-03-25 1986-10-17 Osamu Uenoyama Viscous resistance reducer for ship
JPH09240571A (en) * 1996-03-12 1997-09-16 Ishikawajima Harima Heavy Ind Co Ltd Frictional resistance reducing device of ship
JPH09272491A (en) * 1996-04-08 1997-10-21 Ishikawajima Harima Heavy Ind Co Ltd Air blowoff unit for generating small air bubbles for ship reducing in frictional resistance
JPH11180380A (en) * 1997-12-19 1999-07-06 Ishikawajima Harima Heavy Ind Co Ltd Friction reduction ship and friction reducing method for hull
JPH11348871A (en) * 1998-06-12 1999-12-21 Ishikawajima Harima Heavy Ind Co Ltd Control for air amount supplied to micro bubble device
JP2000128062A (en) * 1998-10-21 2000-05-09 Ishikawajima Harima Heavy Ind Co Ltd Device to reduce friction resistance of ship
ES2302923T3 (en) * 2002-05-07 2008-08-01 Dk Group N.A. N.V. VESSEL WITH AIR CAVITIES WITH CUNEIFORM CAVITIES, LONGITUDINALLY SEPARATED CAVITIES, BALANCE CONTROL MEANS AND METHOD FOR CONSTRUCTION.

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