JP5645568B2 - Ship frictional resistance reducing device and marine organism adhesion preventing method for ship frictional resistance reducing device - Google Patents

Ship frictional resistance reducing device and marine organism adhesion preventing method for ship frictional resistance reducing device Download PDF

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JP5645568B2
JP5645568B2 JP2010214496A JP2010214496A JP5645568B2 JP 5645568 B2 JP5645568 B2 JP 5645568B2 JP 2010214496 A JP2010214496 A JP 2010214496A JP 2010214496 A JP2010214496 A JP 2010214496A JP 5645568 B2 JP5645568 B2 JP 5645568B2
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hull
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JP2012066745A (en
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真一 ▲高▼野
真一 ▲高▼野
千春 川北
千春 川北
信 川淵
信 川淵
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Mitsubishi Heavy Industries Ltd
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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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Description

本発明は、空気吹き出しにより船体の摩擦抵抗を低減する船舶の摩擦抵抗低減装置に関し、特に摩擦抵抗低減装置の海洋生物付着防止に関する。   The present invention relates to a ship frictional resistance reducing device that reduces the frictional resistance of a ship body by blowing air, and more particularly to marine organism adhesion prevention of the frictional resistance reducing apparatus.

船舶の航行中、空気吹き出し装置が船底に設けられた空気吹き出し口から水中に空気を吹き出して船底面を覆う気泡流を形成し、これにより船体摩擦抵抗を低減する技術が知られている。   2. Description of the Related Art A technique is known in which an air blowing device blows air into water from an air blowing port provided at the bottom of a ship to form a bubble flow that covers the bottom of the ship during navigation of the ship, thereby reducing the hull frictional resistance.

停泊中は空気の吹き出しを停止するため、空気吹き出し口から空気吹き出し装置内に海水が浸入する。したがって、藻類や貝類（フジツボ、ムラサキ貝等）のような海洋生物が空気吹き出し装置内に付着し、空気吹き出し装置が閉塞してしまうおそれがある。付着した海洋生物を除去するためには多大な労力が必要である。   Since the air blowing is stopped during berth, seawater enters the air blowing device from the air blowing port. Therefore, marine organisms such as algae and shellfish (barnacles, mussels, etc.) may adhere to the air blowing device and the air blowing device may be blocked. A great deal of effort is required to remove attached marine life.

特許文献１は、コンプレッサから空気吹き出し器に送られる加圧空気に塩素ガスを混入させて空気吹き出し器から吹き出させることで海生生物による空気吹き出し部の閉塞を防止する船舶の摩擦抵抗低減装置を開示している。   Patent Document 1 discloses a ship frictional resistance reduction device that prevents blockage of an air blowing portion by marine organisms by mixing chlorine gas into pressurized air sent from a compressor to an air blowing device and blowing it out from the air blowing device. Disclosure.

特開平１１−３１０１８８号公報JP 11-310188 A

本発明の目的は、海洋生物の付着が防止される船舶の摩擦抵抗低減装置及び船舶摩擦抵抗低減装置の海洋生物付着防止方法に関する。   The objective of this invention is related with the marine organism adhesion prevention method of the frictional resistance reduction apparatus of a ship in which adhesion of a marine organism is prevented, and a ship frictional resistance reduction apparatus.

以下に、（発明を実施するための形態）で使用される番号を用いて、課題を解決するための手段を説明する。これらの番号は、（特許請求の範囲）の記載と（発明を実施するための形態）との対応関係を明らかにするために付加されたものである。ただし、それらの番号を、（特許請求の範囲）に記載されている発明の技術的範囲の解釈に用いてはならない。   The means for solving the problem will be described below using the numbers used in the (DETAILED DESCRIPTION). These numbers are added to clarify the correspondence between the description of (Claims) and (Mode for Carrying Out the Invention). However, these numbers should not be used to interpret the technical scope of the invention described in (Claims).

本発明による船舶の摩擦抵抗低減装置は、船体（１０）の没水部分（１３）に設けられた空気吹き出し口（３１〜３３）から空気を水中に吹き出す空気吹き出し装置（３０）と、前記空気吹き出し口から吹き出された空気を前記船体の船底（１３）に設けられた空気回収口（４１〜４３）から前記船体内に回収する空気回収装置（４０）と、前記船体内から前記空気回収装置内に空気を供給する空気供給源（９０、３４）とを具備する。   An apparatus for reducing frictional resistance of a ship according to the present invention includes an air blowing device (30) for blowing air into water from air blowing ports (31 to 33) provided in a submerged portion (13) of a hull (10), and the air An air recovery device (40) for recovering air blown out from the air outlet into the hull from air recovery ports (41-43) provided on the bottom (13) of the hull, and the air recovery device from the hull And an air supply source (90, 34) for supplying air therein.

上記船舶の摩擦抵抗低減装置は、前記空気回収装置内の水面位置を検出する水面位置センサ（９５）を更に具備する。前記空気供給源は、前記水面位置が所定位置より低い場合に前記空気回収装置内への空気の供給を停止する。   The ship frictional resistance reducing device further includes a water surface position sensor (95) for detecting a water surface position in the air recovery device. The air supply source stops the supply of air into the air recovery device when the water surface position is lower than a predetermined position.

前記空気吹き出し装置は、前記空気吹き出し口に空気を供給する空気供給装置（３４）を備える。前記空気供給源は前記空気供給装置である。   The air blowing device includes an air supply device (34) for supplying air to the air blowing port. The air supply source is the air supply device.

本発明による船舶摩擦抵抗低減装置の海洋生物付着防止方法は、航行中に船体（１０）の没水部分（１３）に設けられた空気吹き出し口（３１〜３３）から空気を水中に吹き出すステップと、前記航行中に前記空気吹き出し口から吹き出された空気を空気回収装置（４０）が前記船体の船底（１３）に設けられた空気回収口（４１〜４３）から前記船体内に回収するステップと、停船中に前記空気回収装置内に空気を供給するステップとを具備する。   The marine organism adhesion prevention method of the ship frictional resistance reduction device according to the present invention includes a step of blowing air into water from air blowing ports (31 to 33) provided in a submerged portion (13) of the hull (10) during navigation. The air recovery device (40) recovers air blown from the air outlet during the navigation from the air recovery ports (41-43) provided in the ship bottom (13) into the hull. And supplying air into the air recovery device while the ship is stopped.

前記空気回収装置内に空気を供給する前記ステップは、前記空気回収装置内の水面位置を検出するステップと、前記水面位置が所定位置より低い場合に前記空気回収装置内への空気の供給を停止するステップとを含む。   The step of supplying air into the air recovery device includes the step of detecting a water surface position in the air recovery device and stopping the supply of air into the air recovery device when the water surface position is lower than a predetermined position. Including the step of.

上記船舶摩擦抵抗低減装置の海洋生物付着防止方法は、停船中に前記空気吹き出し口に空気を供給するステップを更に具備する。   The marine organism adhesion preventing method of the ship frictional resistance reducing device further includes a step of supplying air to the air outlet during stoppage.

本発明によれば、海洋生物の付着が防止される船舶の摩擦抵抗低減装置及び船舶摩擦抵抗低減装置の海洋生物付着防止方法が提供される。   ADVANTAGE OF THE INVENTION According to this invention, the marine organism adhesion prevention method of the ship frictional resistance reduction apparatus and ship frictional resistance reduction apparatus by which adhesion of marine organisms is prevented is provided.

図１は、本発明の第１の実施形態に係る船舶の側面図である。FIG. 1 is a side view of a ship according to the first embodiment of the present invention. 図２は、第１の実施形態に係る船舶の底面図である。FIG. 2 is a bottom view of the ship according to the first embodiment. 図３は、本発明の第２の実施形態に係る船舶の側面図である。FIG. 3 is a side view of a ship according to the second embodiment of the present invention. 図４は、本発明の第３の実施形態に係る摩擦抵抗低減装置の一部を示すブロック図である。FIG. 4 is a block diagram showing a part of the frictional resistance reduction device according to the third embodiment of the present invention.

添付図面を参照して、本発明による船舶の摩擦抵抗低減装置及び船舶摩擦抵抗低減装置の海洋生物付着防止方法を実施するための形態を以下に説明する。   With reference to the attached drawings, a mode for carrying out a marine organism adhesion preventing method of a marine frictional resistance reducing device and marine frictional resistance reducing device according to the present invention will be described below.

（第１の実施形態）
図１を参照して、本発明の第１の実施形態に係る船舶は、船体１０と、船体１０に設けられた摩擦抵抗低減装置２０を備える。摩擦抵抗低減装置２０は、空気吹き出し装置３０と、空気回収装置４０と、空気吹き出し装置３０と空気回収装置４０とを接続する戻り空気管路６１と、戻り空気管路６１を開閉するバルブ７１と、空気供給源９０を備える。船体１０は、船首１１と、船尾１２と、船底１３と、プロペラ１６と、舵１７を備える。プロペラ１６及び舵１７は船尾１２に設けられている。船体１０の船長方向（前後方向）及び水深方向（上下方向）が、それぞれＸ及びＺで示されている。 (First embodiment)
Referring to FIG. 1, a ship according to a first embodiment of the present invention includes a hull 10 and a frictional resistance reduction device 20 provided on the hull 10. The frictional resistance reduction device 20 includes an air blowing device 30, an air recovery device 40, a return air pipe 61 that connects the air blowing device 30 and the air recovery device 40, and a valve 71 that opens and closes the return air pipe 61. The air supply source 90 is provided. The hull 10 includes a bow 11, a stern 12, a ship bottom 13, a propeller 16, and a rudder 17. The propeller 16 and the rudder 17 are provided on the stern 12. A ship length direction (front-rear direction) and a water depth direction (up-down direction) of the hull 10 are indicated by X and Z, respectively.

空気吹き出し装置３０は、船底１３の船首１１側部分に設けられた空気吹き出し口３１〜３３と、空気供給装置３４と、空気取り込み管路３５と、空気取り込み管路３５を開閉するバルブ３９と、空気吹き出し管路３６とを備える。空気供給装置３４は、コンプレッサ、ブロワ、又はファンを含む。空気供給装置３４は、船体１０の喫水線ＷＬより高い位置に配置される。空気取り込み管路３５は、空気供給装置３４の吸込側に接続されている。空気吹き出し管路３６は、空気吹き出し口３１〜３３を空気供給装置３４の吐出側に接続する。空気吹き出し管路３６は、空気供給装置３４の吐出側に接続された幹管路３７と、幹管路３７と空気吹き出し口３１を接続する枝管路３８Ａと、幹管路３７と空気吹き出し口３２を接続する枝管路３８Ｂと、幹管路３７と空気吹き出し口３３を接続する枝管路３８Ｃを備える。空気吹き出し装置３０は、空気吹き出し口３１〜３３から水中に空気を吹き出して船底１３を覆う気泡流を形成する。   The air blowing device 30 includes air blowing ports 31 to 33 provided on the bow 11 side portion of the ship bottom 13, an air supply device 34, an air intake pipe 35, and a valve 39 that opens and closes the air intake pipe 35, And an air blowing conduit 36. The air supply device 34 includes a compressor, a blower, or a fan. The air supply device 34 is disposed at a position higher than the water line WL of the hull 10. The air intake conduit 35 is connected to the suction side of the air supply device 34. The air blowing pipe line 36 connects the air blowing ports 31 to 33 to the discharge side of the air supply device 34. The air blowing line 36 includes a trunk line 37 connected to the discharge side of the air supply device 34, a branch line 38A connecting the trunk line 37 and the air blowing port 31, and the trunk line 37 and the air blowing port. 32, a branch pipe 38 </ b> B that connects 32, and a branch pipe 38 </ b> C that connects the main pipe 37 and the air outlet 33. The air blowing device 30 blows air into the water from the air blowing ports 31 to 33 to form a bubble flow that covers the ship bottom 13.

空気回収装置４０は、船底１３の船尾１２側部分に設けられた空気回収口４１〜４３と、空気回収チャンバ５１〜５３と、空気放出管路５５を備える。ここで、空気回収チャンバ５１〜５３は気液分離機能を有する。空気回収チャンバ５１〜５３は、気液分離機能を有する場合、気液分離チャンバ５１〜５３と称されることがある。空気回収口４１〜４３は、空気吹き出し口３１〜３３より船尾１２側且つプロペラ１６より船首１１側に配置されている。空気回収口４１は空気回収チャンバ５１の底板に形成されている。空気回収口４２は空気回収チャンバ５２の底板に形成されている。空気回収口４３は空気回収チャンバ５３の底板に形成されている。空気回収チャンバ５１〜５３の底板は、船底１３の外板と同一面上に配置される。空気放出管路５５は、水深方向Ｚに延びる幹管路５６と、幹管路５６の上端部に設けられた空気放出バルブ５９と、幹管路５６の下端部と空気回収チャンバ５１とを接続する枝管路５７Ａと、幹管路５６の下端部と空気回収チャンバ５２とを接続する枝管路５７Ｂと、幹管路５６の下端部と空気回収チャンバ５３とを接続する枝管路５７Ｃとを備える。空気回収装置４０は、空気吹き出し装置３０が水中に吹き出した空気を空気回収口４１〜４３から船体１０内に回収して大気中に放出する。空気回収装置４０がプロペラ１６より船首１１側で空気を回収するため、気泡がプロペラ１６に巻き込まれることが防止される。   The air recovery device 40 includes air recovery ports 41 to 43 provided at the stern 12 side portion of the bottom 13, air recovery chambers 51 to 53, and an air discharge pipe 55. Here, the air recovery chambers 51 to 53 have a gas-liquid separation function. When the air collection chambers 51 to 53 have a gas-liquid separation function, they may be referred to as gas-liquid separation chambers 51 to 53. The air recovery ports 41 to 43 are arranged on the stern 12 side from the air blowing ports 31 to 33 and on the bow 11 side from the propeller 16. The air recovery port 41 is formed in the bottom plate of the air recovery chamber 51. The air recovery port 42 is formed in the bottom plate of the air recovery chamber 52. The air recovery port 43 is formed in the bottom plate of the air recovery chamber 53. The bottom plates of the air recovery chambers 51 to 53 are arranged on the same plane as the outer plate of the ship bottom 13. The air discharge pipe 55 connects the main pipe 56 extending in the water depth direction Z, the air discharge valve 59 provided at the upper end of the main pipe 56, and the lower end of the main pipe 56 and the air recovery chamber 51. A branch line 57A that connects the lower end of the main line 56 and the air recovery chamber 52; a branch line 57C that connects the lower end of the main line 56 and the air recovery chamber 53; Is provided. The air collection device 40 collects the air blown out into the water by the air blowing device 30 into the hull 10 from the air collection ports 41 to 43 and releases it into the atmosphere. Since the air recovery device 40 recovers air on the bow 11 side from the propeller 16, air bubbles are prevented from being caught in the propeller 16.

尚、幹管路５６は、幹管路５６全体が水深方向Ｚに延びている場合に限定されず、下端部から上端部に近づくにしたがって位置が高くなっていればよい。   The main conduit 56 is not limited to the case where the entire main conduit 56 extends in the water depth direction Z, and the position only needs to be higher as it approaches the upper end from the lower end.

戻り空気管路６１は、空気取り込み管路３５と幹管路５６とを接続する。戻り空気管路６１の一端は、空気取り込み管路３５のバルブ３９と空気供給装置３４の間の部分に接続される。戻り空気管路６１の他端は、空気放出バルブ５９と幹管路５６の下端部の間の部分に接続される。戻り空気管路６１が幹管路５６に接続される部位は、喫水線ＷＬより高い位置に配置される。   The return air pipeline 61 connects the air intake pipeline 35 and the trunk pipeline 56. One end of the return air pipe 61 is connected to a portion of the air intake pipe 35 between the valve 39 and the air supply device 34. The other end of the return air pipe 61 is connected to a portion between the air discharge valve 59 and the lower end of the main pipe 56. The part where the return air pipe 61 is connected to the main pipe 56 is arranged at a position higher than the water draft WL.

空気供給源９０は、コンプレッサ、ブロワ、ファン、又は圧力タンクを含む。空気供給源９０は、喫水線ＷＬより高い位置に配置される。空気供給源９０は、空気供給管路９１を介して幹管路５６に接続されている。空気供給管路９１を開閉するバルブ９２が設けられている。空気供給管路９１が幹管路５６に接続される部位は、空気放出バルブ５９と幹管路５６の下端部の間に配置され、喫水線ＷＬより高い位置に配置される。空気供給源９０は、藻類や貝類（フジツボ、ムラサキ貝等）のような海洋生物が空気回収装置４０内に付着することを防止するために用いられる。   The air supply source 90 includes a compressor, a blower, a fan, or a pressure tank. The air supply source 90 is arranged at a position higher than the water line WL. The air supply source 90 is connected to the main pipeline 56 via the air supply pipeline 91. A valve 92 for opening and closing the air supply conduit 91 is provided. The part where the air supply conduit 91 is connected to the main conduit 56 is disposed between the air discharge valve 59 and the lower end portion of the main conduit 56, and is disposed at a position higher than the draft line WL. The air supply source 90 is used to prevent marine organisms such as algae and shellfish (barnacles, mussels, etc.) from adhering to the air recovery device 40.

図２を参照して、船体１０の船長方向（前後方向）及び船幅方向（左右方向）が、それぞれＸ及びＹで示されている。船体１０は、左舷１４と、右舷１５とを備える。プロペラ１６は船体１０のセンターラインＣＬ上に配置される。空気吹き出し口３１〜３３は、互いに離れている。空気回収口４１〜４３は、互いに離れている。   With reference to FIG. 2, the ship length direction (front-rear direction) and the ship width direction (left-right direction) of the hull 10 are indicated by X and Y, respectively. The hull 10 includes a port 14 and a starboard 15. The propeller 16 is disposed on the center line CL of the hull 10. The air outlets 31 to 33 are separated from each other. The air recovery ports 41 to 43 are separated from each other.

空気吹き出し口３１〜３３は、それぞれ複数の空気吹き出し孔によって形成される。空気吹き出し口３１は、船幅方向Ｙに延びる帯形状に形成され、センターラインＣＬをまたぐように設けられる。空気吹き出し口３２は、船幅方向Ｙに延びる帯形状に形成され、空気吹き出し口３１よりも左舷１４側に張り出すようにセンターラインＣＬよりも左舷１４側に設けられる。空気吹き出し口３２は、船幅方向Ｙに延びる帯形状に形成され、空気吹き出し口３１よりも右舷１５側に張り出すようにセンターラインＣＬよりも右舷１５側に設けられる。空気吹き出し口３２及び３３は空気吹き出し口３１よりも船尾１２側に配置される。例えば、空気吹き出し口３２の船長方向Ｘ位置と空気吹き出し口３３の船長方向Ｘ位置とは一致する。   The air blowing ports 31 to 33 are each formed by a plurality of air blowing holes. The air outlet 31 is formed in a band shape extending in the ship width direction Y, and is provided so as to straddle the center line CL. The air outlet 32 is formed in a band shape extending in the ship width direction Y, and is provided on the port 14 side of the center line CL so as to protrude from the air outlet 31 to the port 14 side. The air outlet 32 is formed in a band shape extending in the ship width direction Y, and is provided on the starboard 15 side of the center line CL so as to protrude from the air outlet 31 to the starboard 15 side. The air outlets 32 and 33 are disposed closer to the stern 12 than the air outlet 31. For example, the ship direction X position of the air outlet 32 and the ship direction X position of the air outlet 33 coincide.

このように空気吹き出し口３１〜３３が構成されるため、空気吹き出し口３１〜３３が船長方向Ｘの同じ位置に配置される場合に比べてサギングやホギングにより生じる縦曲げに対する船体１０の強度が確保される。空気吹き出し口３１〜３３が船幅方向Ｙの広い範囲に分布するため、船底１３の船幅方向Ｙに広い範囲を気泡流で覆うことが可能である。   Since the air outlets 31 to 33 are configured in this way, the strength of the hull 10 against vertical bending caused by sagging or hogging is ensured as compared with the case where the air outlets 31 to 33 are arranged at the same position in the ship length direction X. Is done. Since the air outlets 31 to 33 are distributed over a wide range in the ship width direction Y, it is possible to cover a wide range in the ship width direction Y of the ship bottom 13 with a bubble flow.

空気回収口４１〜４３は、それぞれ複数の空気回収孔によって形成される。空気回収口４１は、船幅方向Ｙに延びる帯形状に形成され、センターラインＣＬをまたぐように設けられる。空気回収口４２は、船幅方向Ｙに延びる帯形状に形成され、空気回収口４１よりも左舷１４側に張り出すようにセンターラインＣＬよりも左舷１４側に設けられる。空気回収口４３は、船幅方向Ｙに延びる帯形状に形成され、空気回収口４１よりも右舷１５側に張り出すようにセンターラインＣＬよりも右舷１５側に設けられる。空気回収口４２及び空気回収口４３は空気回収口４１よりも船首１１側に配置される。例えば、空気回収口４２の船長方向Ｘ位置と空気回収口４３の船長方向Ｘ位置とは一致する。   The air recovery ports 41 to 43 are each formed by a plurality of air recovery holes. The air recovery port 41 is formed in a band shape extending in the ship width direction Y, and is provided so as to straddle the center line CL. The air recovery port 42 is formed in a band shape extending in the ship width direction Y, and is provided on the port 14 side of the center line CL so as to protrude from the air recovery port 41 to the port 14 side. The air recovery port 43 is formed in a band shape extending in the ship width direction Y, and is provided on the starboard 15 side of the center line CL so as to protrude from the air recovery port 41 to the starboard 15 side. The air recovery port 42 and the air recovery port 43 are disposed closer to the bow 11 than the air recovery port 41. For example, the ship recovery direction X position of the air recovery port 42 and the ship recovery direction X position of the air recovery port 43 coincide.

このように空気回収口４１〜４３が構成されるため、空気回収口４１〜４３が船長方向Ｘの同じ位置に配置される場合に比べてサギングやホギングにより生じる縦曲げに対する船体１０の強度が確保される。空気回収口４１〜４３が船幅方向Ｙの広い範囲に分布するため、船底１３の船幅方向Ｙに広い範囲で空気を回収することができる。空気回収口４１が空気回収口４２及び空気回収口４３よりもプロペラ１６の近くに配置されるため、気泡がプロペラ１６に巻き込まれることが確実に防止される。   Since the air recovery ports 41 to 43 are configured in this way, the strength of the hull 10 against vertical bending caused by sagging or hogging is ensured as compared with the case where the air recovery ports 41 to 43 are arranged at the same position in the ship length direction X. Is done. Since the air recovery ports 41 to 43 are distributed in a wide range in the ship width direction Y, air can be recovered in a wide range in the ship width direction Y of the ship bottom 13. Since the air recovery port 41 is disposed closer to the propeller 16 than the air recovery port 42 and the air recovery port 43, air bubbles are reliably prevented from being caught in the propeller 16.

以下、航行中における摩擦抵抗低減装置２０の動作を詳細に説明する。   Hereinafter, the operation of the frictional resistance reduction device 20 during navigation will be described in detail.

ここで、バルブ３９及び空気放出バルブ５９は開状態であり、バルブ７１及びバルブ９２は閉状態である。空気供給装置３４は、空気取り込み管路３５を介して大気から空気を取り込んで加圧し、空気吹き出し管路３６を介して空気吹き出し口３１〜３３に供給する。空気吹き出し口３１〜３３から水中に吹き出された空気によって形成される気泡流によって船底１３が覆われて船体１０の摩擦抵抗が低減される。   Here, the valve 39 and the air release valve 59 are in an open state, and the valve 71 and the valve 92 are in a closed state. The air supply device 34 takes in air from the atmosphere via the air intake pipe 35 and pressurizes it, and supplies it to the air outlets 31 to 33 via the air outlet pipe 36. The ship bottom 13 is covered with the bubble flow formed by the air blown into the water from the air outlets 31 to 33, and the frictional resistance of the hull 10 is reduced.

空気回収装置４０は、空気吹き出し装置３０が水中に吹き出した空気を空気回収口４１〜４３から船体１０内に回収して大気中に放出する。より具体的には、気泡を含む海水が空気回収口４１〜４３をそれぞれ介して気液分離チャンバ５１〜５３に流入する。気液分離チャンバ５１〜５３は海水から空気を分離する。分離された空気は、空気放出管路５５を介して大気中に放出される。   The air collection device 40 collects the air blown out into the water by the air blowing device 30 into the hull 10 from the air collection ports 41 to 43 and releases it into the atmosphere. More specifically, seawater containing bubbles flows into the gas-liquid separation chambers 51 to 53 through the air recovery ports 41 to 43, respectively. The gas-liquid separation chambers 51 to 53 separate air from seawater. The separated air is discharged into the atmosphere via the air discharge pipe 55.

なお、空気回収装置４０は、回収した空気を大気圧よりも高い圧力状態のまま戻り空気管路６１を介して空気供給装置３４に供給してもよい。この場合、バルブ７１が開状態となり、空気放出バルブ５９及びバルブ３９が閉状態となる。空気吹き出し装置３０が空気回収装置４０から供給された空気を空気吹き出し口３１〜３３から水中に吹き出す場合、大気から取り込んだ空気を吹き出す場合に比べて、空気吹き出しのためのエネルギが削減される。   Note that the air recovery device 40 may supply the recovered air to the air supply device 34 via the return air pipe 61 while maintaining a pressure higher than the atmospheric pressure. In this case, the valve 71 is opened, and the air release valve 59 and the valve 39 are closed. When the air blowing device 30 blows the air supplied from the air recovery device 40 into the water from the air blowing ports 31 to 33, the energy for blowing the air is reduced as compared with the case where the air taken from the atmosphere is blown.

以下、停船中における摩擦抵抗低減装置２０の動作を詳細に説明する。   Hereinafter, the operation of the frictional resistance reduction device 20 while the ship is stopped will be described in detail.

ここで、空気放出バルブ５９、及びバルブ７１は閉状態であり、バルブ９２は開状態である。空気供給源９０は、空気供給管路９１を介して空気放出管路５５に空気を供給する。空気供給源９０が船体１０内から船体１０外を経由しないで空気回収装置４０内に空気を供給することで、空気回収装置４０内から空気回収口４１〜４３を介して海水が排出される。したがって、海洋生物が空気回収装置４０内に付着することが防止される。
Here, the air discharge valve 59 and the valve 71 are closed, and the valve 92 is open. The air supply source 90 supplies air to the air discharge line 55 via the air supply line 91. When the air supply source 90 supplies air into the air recovery device 40 without passing through the hull 10 from outside the hull 10, seawater is discharged from the air recovery device 40 through the air recovery ports 41 to 43. Therefore, marine organisms are prevented from adhering to the air recovery device 40.

尚、空気供給装置３４が空気吹き出し口３１〜３３に空気を供給して空気吹き出し装置３０内から海水を排出してもよい。海洋生物が空気吹き出し装置３０内に付着することが防止される。   The air supply device 34 may supply air to the air blowing ports 31 to 33 to discharge seawater from the air blowing device 30. Marine organisms are prevented from adhering to the air blowing device 30.

（第２の実施形態）
図３を参照して、本発明の第２の実施形態に係る摩擦抵抗低減装置２０を説明する。本実施形態にかかる摩擦抵抗低減装置２０は、以下の説明を除いて第１の実施形態に係る摩擦抵抗低減装置２０と同じである。本実施形態においては、空気供給装置３４が空気回収装置４０に空気を供給する空気供給源として機能する。 (Second Embodiment)
With reference to FIG. 3, the frictional resistance reduction apparatus 20 which concerns on the 2nd Embodiment of this invention is demonstrated. The frictional resistance reduction device 20 according to the present embodiment is the same as the frictional resistance reduction device 20 according to the first embodiment except for the following description. In the present embodiment, the air supply device 34 functions as an air supply source that supplies air to the air recovery device 40.

本実施形態に係る摩擦抵抗低減装置２０は、空気供給源９０のかわりに幹管路５６と空気供給装置３４の吐出側とを接続する空気供給管路６２を備える。空気供給管路６２を開閉するバルブ７２が設けられている。空気供給管路６２が幹管路５６に接続される部位は、空気放出バルブ５９と幹管路５６の下端部の間に配置され、喫水線ＷＬより高い位置に配置される。   The frictional resistance reduction device 20 according to the present embodiment includes an air supply conduit 62 that connects the main conduit 56 and the discharge side of the air supply device 34 instead of the air supply source 90. A valve 72 that opens and closes the air supply conduit 62 is provided. A portion where the air supply pipeline 62 is connected to the trunk pipeline 56 is disposed between the air discharge valve 59 and the lower end portion of the trunk pipeline 56 and is disposed at a position higher than the draft line WL.

航行中において、バルブ７２は閉状態である。その他の点については、航行中における摩擦抵抗低減装置２０の動作は第１の実施形態と同様である。   During navigation, the valve 72 is closed. About the other point, operation | movement of the frictional resistance reduction apparatus 20 during navigation is the same as that of 1st Embodiment.

以下、停船中における摩擦抵抗低減装置２０の動作を詳細に説明する。   Hereinafter, the operation of the frictional resistance reduction device 20 while the ship is stopped will be described in detail.

ここで、空気放出バルブ５９、及びバルブ７１は閉状態であり、バルブ３９及びバルブ７２は開状態である。空気供給装置３４は、空気供給管路６２を介して空気放出管路５５に空気を供給する。空気供給装置３４が船体１０内から船体１０外を経由しないで空気供給装置４０内に空気を供給することで、空気回収装置４０内から空気回収口４１〜４３を介して海水が排出される。したがって、海洋生物が空気回収装置４０内に付着することが防止される。   Here, the air release valve 59 and the valve 71 are closed, and the valve 39 and the valve 72 are open. The air supply device 34 supplies air to the air discharge pipe 55 via the air supply pipe 62. When the air supply device 34 supplies air into the air supply device 40 without passing through the hull 10 from outside the hull 10, seawater is discharged from the air recovery device 40 through the air recovery ports 41 to 43. Therefore, marine organisms are prevented from adhering to the air recovery device 40.

尚、空気供給装置３４が空気吹き出し口３１〜３３に空気を供給して空気吹き出し装置３０内から海水を排出してもよい。海洋生物が空気吹き出し装置３０内に付着することが防止される。   The air supply device 34 may supply air to the air blowing ports 31 to 33 to discharge seawater from the air blowing device 30. Marine organisms are prevented from adhering to the air blowing device 30.

本実施形態によれば、空気供給装置３４が空気回収装置４０に空気を供給するため、空気供給装置３４とは別に空気供給源９０を設ける必要がない。これに対し、空気供給源９０が空気回収装置４０に空気を供給する場合、船体１０内をかなりの長さに渡って延びる空気供給管６２が不要である。   According to the present embodiment, since the air supply device 34 supplies air to the air recovery device 40, it is not necessary to provide the air supply source 90 separately from the air supply device 34. On the other hand, when the air supply source 90 supplies air to the air recovery device 40, the air supply pipe 62 extending over a considerable length in the hull 10 is unnecessary.

（第３の実施形態）
図４を参照して、本発明の第３の実施形態に係る摩擦抵抗低減装置２０を説明する。本実施形態に係る摩擦抵抗低減装置２０は、以下の説明を除いて第１の実施形態に係る摩擦抵抗低減装置２０と同じである。 (Third embodiment)
With reference to FIG. 4, the frictional resistance reduction apparatus 20 which concerns on the 3rd Embodiment of this invention is demonstrated. The frictional resistance reduction device 20 according to the present embodiment is the same as the frictional resistance reduction device 20 according to the first embodiment except for the following description.

摩擦抵抗低減装置２０は、空気回収装置４０内の水面位置を検出する水面位置センサ９５を備える。空気供給源９０は、空気回収装置４０内の水面位置が所定位置より低い場合に空気回収装置４０内への空気の供給を停止する。これにより、海洋生物の付着防止のためのエネルギが削減される。   The frictional resistance reduction device 20 includes a water surface position sensor 95 that detects the water surface position in the air recovery device 40. The air supply source 90 stops the supply of air into the air recovery device 40 when the water surface position in the air recovery device 40 is lower than a predetermined position. Thereby, energy for preventing adhesion of marine organisms is reduced.

水面位置センサ９５を第２の実施形態に係る摩擦抵抗低減装置２０に適用してもよい。この場合、空気供給装置３４は、空気回収装置４０内の水面位置が所定位置より低い場合に空気回収装置４０内への空気の供給を停止する。これにより、海洋生物の付着防止のためのエネルギが削減される。尚、空気回収装置４０内への空気の供給を停止するが空気吹き出し口３１〜３３への空気の供給を継続する場合、空気供給装置３４の運転を継続したままバルブ７２を閉じる。   The water surface position sensor 95 may be applied to the frictional resistance reduction device 20 according to the second embodiment. In this case, the air supply device 34 stops the supply of air into the air recovery device 40 when the water surface position in the air recovery device 40 is lower than a predetermined position. Thereby, energy for preventing adhesion of marine organisms is reduced. Note that when the supply of air into the air recovery device 40 is stopped but the supply of air to the air outlets 31 to 33 is continued, the valve 72 is closed while the operation of the air supply device 34 is continued.

更に、空気吹き出し装置３０内の水面位置を検出する水面位置センサ（不図示）が設けられてもよい。空気供給装置３４は、空気吹き出し装置３０内の水面位置が所定位置より低い場合に空気吹き出し口３１〜３３への空気の供給を停止する。空気供給装置３４が空気回収装置４０内に空気を供給する場合であって、空気吹き出し口３１〜３３への空気の供給を停止するが空気回収装置４０内への空気の供給を継続する場合、空気供給装置３４の運転を継続したまま枝管路３８Ａ〜３８Ｃにそれぞれ設けられたバルブ（不図示）を閉じる。   Further, a water surface position sensor (not shown) for detecting the water surface position in the air blowing device 30 may be provided. The air supply device 34 stops the supply of air to the air blowing ports 31 to 33 when the water surface position in the air blowing device 30 is lower than a predetermined position. In the case where the air supply device 34 supplies air into the air recovery device 40 and stops supplying air to the air outlets 31 to 33, but continues to supply air into the air recovery device 40, Valves (not shown) provided in the branch pipes 38A to 38C are closed while the operation of the air supply device 34 is continued.

以上、実施形態を参照して本発明を説明したが、本発明は上記実施形態に限定されない。上記実施形態に様々な変更を加えることが可能であり、上記実施形態どうしの任意の組合せが可能である。   As mentioned above, although this invention was demonstrated with reference to embodiment, this invention is not limited to the said embodiment. Various modifications can be made to the above embodiment, and any combination of the above embodiments is possible.

例えば、空気吹き出し装置３０が船首１０の船側部分に設けられた空気吹き出し口から空気を水中に吹き出し、船首１０近傍の流線に沿わせて空気を船底１３に回り込ませてもよい。このように、空気吹き出し装置３０は船体１０の没水部分としての船首１０の船側部分や船底１３に設けられた空気吹き出し口から水中に空気を吹き出せばよい。   For example, the air blowing device 30 may blow air into the water from an air blowing port provided in the ship side portion of the bow 10 and cause the air to flow around the ship bottom 13 along a streamline near the bow 10. In this way, the air blowing device 30 may blow air into the water from the ship side portion of the bow 10 as the submerged portion of the hull 10 or the air blowing port provided in the ship bottom 13.

空気吹き出し口及び空気回収口の数及び配置は上記の例に限定されない。また、一つの気液分離チャンバが複数の空気回収口から回収された空気を海水から分離するように空気回収装置４０を構成してもよい。   The number and arrangement of the air outlets and air recovery ports are not limited to the above example. Moreover, you may comprise the air collection | recovery apparatus 40 so that one gas-liquid separation chamber isolate | separates the air collect | recovered from the several air collection | recovery port from seawater.

１０…船体
１１…船首
１２…船尾
１３…船底
１４…左舷
１５…右舷
１６…プロペラ
１７…舵
２０…摩擦抵抗低減装置
３０…空気吹き出し装置
３１〜３３…空気吹き出し口
３４…空気供給装置
３５…空気取り込み管路
３６…空気吹き出し管路
３７…幹管路
３８Ａ〜３８Ｃ…枝管路
３９…バルブ
４０…空気回収装置
４１〜４３…空気回収口
５１〜５３…空気回収チャンバ
５５…空気放出管路
５６…幹管路
５７Ａ〜５７Ｃ…枝管路
５９…空気放出バルブ
６１…戻り空気管路
６２…空気供給管路
７１、７２…バルブ
９０…空気供給源
９１…空気供給管路
９２…バルブ
９５…水面位置センサ
Ｘ…船長方向（前後方向）
Ｙ…船幅方向（左右方向）
Ｚ…水深方向（上下方向）
ＷＬ…喫水線
ＣＬ…センターライン DESCRIPTION OF SYMBOLS 10 ... Hull 11 ... Bow 12 ... Stern 13 ... Ship bottom 14 ... Port 15 ... Starboard 16 ... Propeller 17 ... Rudder 20 ... Friction resistance reduction device 30 ... Air blowing device 31-33 ... Air blowing device 34 ... Air supply device 35 ... Air Intake line 36 ... Air outlet line 37 ... Trunk lines 38A to 38C ... Branch line 39 ... Valve 40 ... Air recovery devices 41 to 43 ... Air recovery ports 51 to 53 ... Air recovery chamber 55 ... Air release line 56 ... main pipes 57A to 57C ... branch pipe 59 ... air discharge valve 61 ... return air pipe 62 ... air supply pipe 71, 72 ... valve 90 ... air supply source 91 ... air supply pipe 92 ... valve 95 ... water surface Position sensor X ... Ship direction (front-rear direction)
Y ... Ship width direction (left-right direction)
Z ... Water depth direction (vertical direction)
WL ... Draft line CL ... Center line

Claims (6)

船体の没水部分に設けられた空気吹き出し口から空気を水中に吹き出す空気吹き出し装置と、
前記空気吹き出し口から吹き出された空気を前記船体の船底に設けられた空気回収口から前記船体内に回収する空気回収装置と、
前記空気回収装置によって回収された空気を放出する空気放出管路と、
前記船体内から前記空気放出管路を介して前記空気回収装置内に空気を供給する空気供給源と
を具備し、
前記空気放出管路を介して前記空気回収装置内に空気を供給し、前記空気回収口を介して海水を排出することで、海洋生物が前記空気回収装置内に付着することを防止する
船舶の摩擦抵抗低減装置。 An air blowing device that blows air into the water from an air blowing port provided in a submerged portion of the hull;
An air recovery device for recovering air blown out from the air outlet into the hull from an air recovery port provided at the bottom of the hull;
An air discharge conduit for discharging the air recovered by the air recovery device;
An air supply source for supplying air into the air recovery device from the hull through the air discharge conduit ;
A ship that prevents marine organisms from adhering in the air recovery device by supplying air into the air recovery device via the air discharge pipe and discharging seawater through the air recovery port . Friction resistance reduction device. 前記空気回収装置内の水面位置を検出する水面位置センサを更に具備し、
前記空気供給源は、前記水面位置が所定位置より低い場合に前記空気回収装置内への空気の供給を停止する
請求項１の船舶の摩擦抵抗低減装置。 A water surface position sensor for detecting a water surface position in the air recovery device;
The ship's frictional resistance reduction device according to claim 1, wherein the air supply source stops the supply of air into the air recovery device when the water surface position is lower than a predetermined position. 前記空気吹き出し装置は、前記空気吹き出し口に空気を供給する空気供給装置を備え、
前記空気供給源は前記空気供給装置である
請求項１又は２の船舶の摩擦抵抗低減装置。 The air blowing device includes an air supply device that supplies air to the air blowing port,
The ship's frictional resistance reduction device according to claim 1 or 2, wherein the air supply source is the air supply device. 航行中に船体の没水部分に設けられた空気吹き出し口から空気を水中に吹き出すステップと、
前記航行中に前記空気吹き出し口から吹き出された空気を空気回収装置が前記船体の船底に設けられた空気回収口から前記船体内に回収するステップと、
前記空気回収装置によって回収された空気を空気放出管路を介して放出するステップと、
停船中に、前記空気回収装置内に、前記空気放出管路を介して空気を供給するステップと
を具備する
船舶摩擦抵抗低減装置の海洋生物付着防止方法。 Blowing air into the water from the air outlet provided in the submerged part of the hull during navigation;
An air recovery device recovers air blown out from the air outlet during the navigation from the air recovery port provided on the bottom of the hull into the hull;
Discharging air recovered by the air recovery device via an air discharge line;
During quarantine, the air collecting device, marine anti-biofouling process of ship frictional resistance reducing device comprising a step of supplying air through the air discharge line. 前記空気回収装置内に空気を供給する前記ステップは、
前記空気回収装置内の水面位置を検出するステップと、
前記水面位置が所定位置より低い場合に前記空気回収装置内への空気の供給を停止するステップと
を含む
請求項４の船舶摩擦抵抗低減装置の海洋生物付着防止方法。 The step of supplying air into the air recovery device comprises:
Detecting a water surface position in the air recovery device;
The marine organism adhesion prevention method of the ship frictional resistance reduction apparatus of Claim 4 including the step which stops supply of the air into the said air collection | recovery apparatus when the said water surface position is lower than a predetermined position. 停船中に前記空気吹き出し口に空気を供給するステップを更に具備する
請求項４又は５の船舶摩擦抵抗低減装置の海洋生物付着防止方法。
The marine organism adhesion prevention method of the ship frictional resistance reduction device according to claim 4 or 5, further comprising a step of supplying air to the air outlet during stoppage.
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US5967071A (en) * 1997-12-02 1999-10-19 Wipper; Daniel J. Energy efficient system and method for reducing water friction on the hull of a marine vessel
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