JP3721401B2 - Ship with propulsion performance improvement device - Google Patents

Ship with propulsion performance improvement device Download PDF

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Publication number
JP3721401B2
JP3721401B2 JP2002303253A JP2002303253A JP3721401B2 JP 3721401 B2 JP3721401 B2 JP 3721401B2 JP 2002303253 A JP2002303253 A JP 2002303253A JP 2002303253 A JP2002303253 A JP 2002303253A JP 3721401 B2 JP3721401 B2 JP 3721401B2
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stern
ship
fin
propulsion
propulsion performance
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JP2004136781A (en
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敏幸 加納
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National Maritime Research Institute
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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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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    • Y02T70/10—Measures concerning design or construction of watercraft hulls

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Description

【０００１】
【発明の属する技術分野】
本発明は、船尾部の船底下面が船尾端へ向かって緩やかに上昇するように傾斜したバトック船型を有する船舶に関し、特に、その推進性能向上のための装置を付設された船舶に関する。
【０００２】
【従来の技術】
一般に、ポッドプロペラなどの推進装置を船尾端に備える場合に用いられるバトック船型では、航行時に船底下面に沿う水の流れを船尾へ円滑に流すために、図１０に示すように、船尾部の船底下面が船尾端へ向かって上昇する傾斜角βを１０数度以下に小さくすることが望ましいとされているが、機関配置や貨物倉配置の制約から、この角度βを図中の角度α程度に大きくせざるを得ないという問題点がある。
【０００３】
【発明が解決しようとする課題】
そこで本発明は、バトック船型における船尾部船底下面の傾斜角をかなり大きく設定しても、航行時に同船底下面に沿う水の流れを円滑に導けるようにして、そのプロペラへの流入に支障を来たさないようにした推進性能向上装置付き船舶を提供することを課題とする。
【０００４】
【課題を解決するための手段】
前述の課題を解決するため、本発明の推進性能向上装置付き船舶は、船尾部の船底下面が船尾端へ向かって緩やかに上昇するように傾斜したバトック船型を有する船舶において、上記船尾部の後部から水中へ垂下するように設けられた推進装置を備え、航行時に船尾部よりも前方のほぼ水平な船底下面に沿う水の流れを上記船尾部の傾斜した船底下面へ沿わせるように導いて上記推進装置へ流入させるべく、上記船尾部の傾斜した船底下面の前端部付近に、同船底下面から離隔するようにして取付け部材を介し装着されたフィンが設けられており、入渠時に上記フィンを上記取付け部材と共に船体付きガイドレールに沿い移動させて前記のほぼ水平な船底下面よりも上方に格納するためのガイドレール付きフィン格納手段が設けられたことを特徴としている。
【０００５】
また、本発明の推進性能向上装置付き船舶は、上記フィンの前縁部と上記船尾部の船底下面との間隔が、上記フィンの後縁部と上記船尾部の船底下面との間隔よりも大きく形成されたことを特徴としている。
【０００６】
さらに、本発明の推進性能向上装置付き船舶は、上記フィンが上記水の流れを円滑に導くための流線形断面を有するとともに、上記取付け部材も流線形断面を有していることを特徴としている。
【０００７】
上述の本発明の推進性能向上装置付き船舶では、船尾部において船尾端へ向け緩やかに上昇するように傾斜した船底下面の前端部付近に、フィンが船底下面から離隔するようにして取付け部材を介し装着されるので、バトック船型において船尾船底下面の傾斜角がかなり大きく設定されても、航行時には船体中央部の船底下面に沿う水の流れが船尾部の船底下面へ剥離を生じることなく円滑に流れてゆき、船尾部の後部から水中へ垂設された推進装置のプロペラへ適切に導入されて、推進性能が向上するようになる。そして、船尾船底下面の傾斜角を大きく設定できるため、船内スペースが広くなり、機関配置や貨物倉配置が容易になる利点が得られるようになる。
【０００８】
また、上記フィンを上記取付け部材と共にガイドレールに沿い移動させて前記のほぼ水平な船底下面よりも上方に格納しうるガイドレール付きフィン格納手段が設けられているにので、その格納作用により上記のフィンおよびその取付け部材が入渠時に邪魔にならない利点が得られる。
【０００９】
さらに、上記フィンの前縁部と上記船尾部の船底下面との間隔が、上記フィンの後縁部と上記船尾部の船底下面との間隔よりも大きく形成されると、航行時に船尾部よりも前方のほぼ水平な船底下面に沿う水の流れを船尾部の傾斜した船底下面へ沿うように移行させる作用がさらに的確に行われるようになる。
【００１０】
そして、上記フィンおよび同フィンの取付け部材がいずれも流線形断面を有している場合は、航行時において、これらのフィンおよび取付け部材による抵抗の増加が低減されるようになる。
【００１１】
また、本発明の推進性能向上装置付き船舶は、船尾部の船底下面が船尾端へ向かって緩やかに上昇するように傾斜したバトック船型を有する船舶において、上記船尾部の後部から水中へ垂下するように設けられた推進装置を備え、航行時に船尾部よりも前方のほぼ水平な船底下面に沿う水の流れを上記船尾部の傾斜した船底下面へ沿わせるように導いて上記推進装置へ流入させるべく、少なくとも上記船尾部よりやや前方のほぼ水平な船底下面に、航行時に乱流境界層を発生させるための凹凸面が形成されており、上記凹凸面を下側に有する可動部材が船底凹部に嵌め込まれるとともに、入渠時に上記可動部材を駆動して同可動部材の凹凸面を上記船底凹部内へ引き込ませるための可動部材駆動手段が設けられたことを特徴としている。
【００１２】
上述のように、バトック船型を有する船舶において、船尾部よりやや前方のほぼ水平な船底下面に凹凸面を形成することにより、航行時に乱流境界層が形成されるようになっていると、水平な船底下面に沿う水の流れが、剥離を生じることなく船尾部の傾斜した船底下面に沿うようになり、このようにして船尾部の後部から水中へ垂下されたポッドプロペラのごとき推進装置のプロペラへの水の流入が適切に行われるようになって、推進性能の向上がもたらされる。
【００１３】
一方、船内スペースについては、バトック船型における船尾船底下面の傾斜角をかなり大きく設定できるため、余裕を生じて、機関配置や貨物倉の配置が容易になる利点が得られる。
【００１４】
また、上記凹凸面を下側に有する可動部材が船底凹部に嵌め込まれて、入渠時には上記可動部材の駆動により、その凹凸面を上記船底凹部内へ引き込ませるための可動部材駆動手段が設けられているので、入渠作業に際して、上記凹凸面を持たない在来の船舶と同様に支障なく取り扱える利点が得られるようになる。
【００１５】
【発明の実施の形態】
以下、図面により本発明の実施形態について説明すると、図１〜６は本発明の第１実施形態としての推進性能向上装置付き船舶を示すもので、図１はその船体後部を示す側面図、図２は図１のＡ−Ａ矢視断面図、図３は図２のＢ−Ｂ断面図、図４は図２のＣ−Ｃ断面図、図５はそのガイドレール付きフィン格納手段を示す縦断面図、図６は図５のＤ−Ｄ矢視断面図であり、図７は本発明の第２実施形態としての推進性能向上装置付き船舶の船体後部側面図、図８は図７の船舶における推進性能向上装置の格納状態を示す縦断面図、図９は図８の推進性能向上装置の作動状態を示す縦断面図である。
【００１６】
まず本発明の第１実施形態について説明すると、図１，２に示すように、船尾部の船底下面１が船尾端へ向かって緩やかに上昇するように傾斜したバトック船型を有する船舶において、船尾部の後部から水中へ垂下するように装着された推進装置としてのポッドプロペラ２が装備されている。
【００１７】
また、航行時に船尾部よりも前方のほぼ水平な船底下面３に沿う水の流れを船尾部の傾斜した船底下面１へ沿わせるように導いてポッドプロペラ２のプロペラ２ａへ流入させうるように、船尾部の傾斜した船底下面１の前端部付近に、同船底下面１から離隔するようにしてフィン４が取付け部材５を介し装着されている。
そして、取付け部材５およびフィン４は、それぞれ図３および図４に示すように、水の流れを円滑に導くための流線形断面を有している。
【００１８】
船尾部の船底下面１は、船内のスペースに余裕をもたせるためバトック船型としてはかなり大きい傾斜角αを有しているが、フィン４は、船尾部船底下面１の傾斜角αよりも大きい迎え角を有するように、フィン４の前縁部と船尾部船底下面１との間隔が、フィン４の後縁部と船尾部船底下面１との間隔よりも大きく形成されている。
なお、フィン４は、左右端に、それぞれ斜め上方へ反り上がった安定翼４ａを有している。
【００１９】
本実施形態では、この船舶の入渠時にフィン４を取付け部材５と共に船体付きガイドレール６に沿い移動させて、ほぼ水平な船底下面３よりも上方へ格納できるように、ガイドレール付きフィン格納手段が設けられている。
【００２０】
図５および図６はガイドレール付きフィン格納手段の一例を示しており、モーター７によりシーブ９〜12を介して駆動されるエンドレスワイヤ８に、フィン４の取付け部材５が固着されていて、フィン４の停止位置では液圧式ストッパー13によりフィン４の固定が行われるようになっている。
【００２１】
上述の第１実施形態の推進性能向上装置付き船舶では、船尾部において船尾端へ向け緩やかに上昇するように傾斜した船底下面１の前端部付近に、フィン４が船底下面１から離隔するようにして取付け部材５を介し装着されるので、バトック船型において船尾船底下面１の傾斜角αがかなり大きく設定されても、航行時には船体中央部の船底下面３に沿う水の流れが船尾部の船底下面１へ剥離を生じることなく円滑に流れてゆき、船尾部の後部から水中へ垂設されたポッドプロペラ２のプロペラ２ａへ適切に導入されて、推進性能が向上するようになる。そして、船尾船底下面１の傾斜角αを大きく設定できるため、船内スペースが広くなり、機関配置や貨物倉配置が容易になる利点が得られるようになる。
【００２２】
また、フィン４の前縁部と船尾部の船底下面１との間隔が、フィン４の後縁部と船尾部の船底下面１との間隔よりも大きく形成されるので、航行時に船尾部よりも前方のほぼ水平な船底下面３に沿う水の流れを船尾部の傾斜した船底下面１へ沿うように移行させる作用がさらに的確に行われるようになる。
【００２３】
そして、フィン４および同フィン４の取付け部材５がいずれも流線形断面を有しているので、航行時において、これらのフィン４および取付け部材５による抵抗の増加が低減されるようになる。
【００２４】
また、フィン４を取付け部材５と共にガイドレール６に沿い移動させて前記のほぼ水平な船底下面３よりも上方に格納しうるガイドレール付きフィン格納手段が設けられているので、その格納作用によりフィン４およびその取付け部材５が入渠時に邪魔にならない利点が得られる。
【００２５】
次に、本発明の第２実施形態について説明すると、図７に示すように、この実施形態の場合も、船尾部の船底下面１が船尾端へ向かって緩やかに上昇するように傾斜したバトック船型を有する船舶において、船尾部の後部から水中へ垂下するように推進装置としてのポッドプロペラ２が設けられている。
【００２６】
そして、航行時に、船尾部よりも前方のほぼ水平な船底下面３に沿う水の流れを、船尾部の傾斜した船底下面１へ沿わせるように導くため、少なくとも船尾部よりやや前方のほぼ水平な船底下面３に、航行の際、乱流境界層を発生させる凹凸面20が形成されている。
【００２７】
この凹凸面20は、固定式のものでもよいが、本実施形態では、図８および図９に示すように、凹凸面20を下側に有する可動部材21が船底凹部22内に上下摺動可能に嵌め込まれるとともに、入渠時に可動部材21を駆動して同可動部材21の下側の凹凸面20を船底凹部22内へ引き込ませるための可動部材駆動手段が設けられている。
【００２８】
すなわち、可動部材21と船底凹部22との間の空間23にタンク24内の水をポンプ25によりバルブ26を介して導くことにより、その水圧で可動部材21を下方へ押圧し、その凹凸面20を船底下面より下方へ突出させることができるとともに、ポンプ 25 で空間 23 内の水を吸引することにより可動部材 21 を船底凹部 22 内へ引込ませることができるようになっている。
また、可動部材21の下方への脱落を防止できるように、ストッパー機構27が設けられている。
【００２９】
上述の第２実施形態では、バトック船型を有する船舶において、船尾部よりやや前方のほぼ水平な船底下面３に凹凸面20を形成することにより、航行時に乱流境界層が形成されるようになっているので、水平な船底下面３に沿う水の流れが、剥離を生じることなく船尾部の傾斜した船底下面１に沿うようになり、このようにして船尾部の後部から水中へ垂下されたポッドプロペラ２のプロペラ２ａへの水の流入が適切に行われるようになって、推進性能の向上がもたらされる。
【００３０】
一方、船内スペースについては、バトック船型における船尾船底下面の傾斜角αをかなり大きく設定できるため、余裕を生じて、機関配置や貨物倉の配置が容易になる利点が得られる。
【００３１】
また、凹凸面20を下側に有する可動部材21が船底凹部22に嵌め込まれて、入渠時には同可動部材21の駆動により、その凹凸面20を船底凹部22内へ引き込ませるための可動部材駆動手段が設けられているので、入渠作業に際して、凹凸面20を持たない在来の船舶と同様に支障なく取り扱える利点が得られるようになる。
【００３２】
【発明の効果】
以上詳述したように、本発明の推進性能向上装置付き船舶によれば次のような効果が得られる。
(1) 船尾部において船尾端へ向け緩やかに上昇するように傾斜した船底下面の前端部付近に、フィンが船底下面から離隔するようにして取付け部材を介し装着されるので、バトック船型において船尾船底下面の傾斜角がかなり大きく設定されても、航行時には船体中央部の船底下面に沿う水の流れが船尾部の船底下面へ剥離を生じることなく円滑に流れてゆき、船尾部の後部から水中へ垂設された推進装置のプロペラへ適切に導入されて、推進性能が向上するようになる。そして、船尾船底下面の傾斜角を大きく設定できるため、船内スペースが広くなり、機関配置や貨物倉配置が容易になる利点が得られるようになる。また、上記フィンを上記取付け部材と共にガイドレールに沿い移動させて前記のほぼ水平な船底下面よりも上方に格納しうるガイドレール付きフィン格納手段が設けられているので、その格納作用により上記のフィンおよびその取付け部材が入渠時に邪魔にならない利点が得られる。
(2) 上記フィンの前縁部と上記船尾部の船底下面との間隔が、上記フィンの後縁部と上記船尾部の船底下面との間隔よりも大きく形成されると、航行時に船尾部よりも前方のほぼ水平な船底下面に沿う水の流れを船尾部の傾斜した船底下面へ沿うように移行させる作用がさらに的確に行われるようになる。
(3) 上記フィンおよび同フィンの取付け部材がいずれも流線形断面を有している場合は、航行時において、これらのフィンおよび取付け部材による抵抗の増加が低減されるようになる。
(4) バトック船型を有する船舶において、船尾部よりやや前方のほぼ水平な船底下面に凹凸面を形成することにより、航行時に乱流境界層が形成されるようになっていると、水平な船底下面に沿う水の流れが、剥離を生じることなく船尾部の傾斜した船底下面に沿うようになり、このようにして船尾部の後部から水中へ垂下されたポッドプロペラのごとき推進装置のプロペラへの水の流入が適切に行われるようになって、推進性能の向上がもたらされる。一方、船内スペースについては、バトック船型における船尾船底下面の傾斜角をかなり大きく設定できるため、余裕を生じて、機関配置や貨物倉の配置が容易になる利点が得られる。
(5) 上記凹凸面を下側に有する可動部材が船底凹部に嵌め込まれて、入渠時には上記可動部材の駆動により、その凹凸面を上記船底凹部内へ引き込ませるための可動部材駆動手段が設けられているので、入渠作業に際して、上記凹凸面を持たない在来の船舶と同様に支障なく取り扱える利点が得られるようになる。
(6) 上記各項により、本発明の推進性能向上装置付き船舶によれば、バトック船型における船尾部船底下面の傾斜角をかなり大きく設定しても、航行時に同船底下面に沿う水の流れを円滑に導けるようにして、そのプロペラへの流入に支障を来たさないようにすることが可能になる。
【図面の簡単な説明】
【図１】 本発明の第１実施形態としての推進性能向上装置付き船舶の船体後部を示す側面図である。
【図２】 図１のＡ−Ａ矢視断面図である。
【図３】 図２のＢ−Ｂ断面図である。
【図４】 図２のＣ−Ｃ断面図である。
【図５】 図１の推進性能向上装置付き船舶におけるガイドレール付きフィン格納手段を示す縦断面図である。
【図６】 図５のＤ−Ｄ矢視断面図である。
【図７】 本発明の第２実施形態としての推進性能向上装置付き船舶の船体後部側面図である。
【図８】 図７の船舶における推進性能向上装置の格納状態を示す縦断面図である。
【図９】 図８の推進性能向上装置の作動状態を示す縦断面図である。
【図１０】 従来のバトック船型を有する船舶の船体後部側面図である。
【符号の説明】
１ 船尾部船底下面
２ ポッドプロペラ
２ａ プロペラ
３ 船尾部より前方の水平な船底下面
４ フィン
４ａ 安定翼
４ｂ 支軸
５ 取付け部材
６ ガイドレール
７ モーター
８ エンドレスワイヤ
９〜１２ シーブ
13 液圧式ストッパ
20 凹凸面
21 可動部材
22 船底凹部
23 空間
24 タンク
25 ポンプ
26 バルブ
27 ストッパー機構[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a ship having a buttocks hull form such that the bottom bottom surface of the stern part gently rises toward the stern end, and more particularly to a ship provided with a device for improving its propulsion performance.
[0002]
[Prior art]
In general, in a buttocks hull form used when a propulsion device such as a pod propeller is provided at the stern end, as shown in FIG. 10 , in order to smoothly flow the water along the bottom surface of the stern to the stern during navigation, Although it is desirable to reduce the inclination angle β at which the lower surface rises toward the stern end to less than 10 degrees, this angle β is set to about the angle α in the figure due to restrictions on engine arrangement and cargo hold arrangement. There is a problem that it must be enlarged.
[0003]
[Problems to be solved by the invention]
Therefore, the present invention prevents the inflow to the propeller by smoothly guiding the water flow along the bottom bottom surface of the stern when navigating, even if the inclination angle of the bottom bottom surface of the stern portion is set to be considerably large. It is an object of the present invention to provide a ship with a propulsion performance improving device that does not play.
[0004]
[Means for Solving the Problems]
In order to solve the above-described problems, a ship with a propulsion performance improving device according to the present invention is a ship having a buttocks hull form so that the bottom bottom surface of the stern part gently rises toward the stern end. And a propulsion device provided so as to hang from the water to the water, and guides the flow of water along the bottom surface of the bottom of the ship substantially horizontal ahead of the stern during navigation to the bottom surface of the bottom of the stern that is inclined. in order to flow into the propulsion apparatus, the in the vicinity of the front end portion of the ship bottom underside that inclination of the stern section, has the fitted fin through the attachment member provided so as to apart from the ship bottom underside, the fin during docking that the guide rail finned storage means for move along with the mounting member to the hull with the guide rail and stores above the generally horizontal vessel bottom lower surface of the provided It is a symptom.
[0005]
Further, in the ship with a propulsion performance improving device of the present invention, the distance between the front edge of the fin and the bottom bottom of the stern is larger than the distance between the rear edge of the fin and the bottom bottom of the stern. It is characterized by being formed.
[0006]
Furthermore, the ship with a propulsion performance improving device of the present invention is characterized in that the fin has a streamline cross section for smoothly guiding the water flow, and the mounting member also has a streamline cross section. .
[0007]
In the ship with the propulsion performance improving device of the present invention described above, the fins are spaced from the bottom surface of the bottom of the ship so that the fins are spaced apart from the bottom surface of the bottom of the bottom of the bottom of the ship. Because it is installed, even when the inclination angle of the bottom surface of the stern bottom is set to be quite large in the buttocks, the water flow along the bottom bottom surface of the center of the hull flows smoothly without causing separation to the bottom bottom surface of the stern during navigation. As a result, the propulsion performance is improved by being properly introduced into the propeller of the propulsion device suspended underwater from the rear of the stern. And since the inclination angle of the bottom surface of the stern bottom can be set large, the inboard space is widened, and the advantages of facilitating engine arrangement and cargo hold arrangement can be obtained.
[0008]
In addition, since the fin is moved along the guide rail together with the mounting member to be stored above the substantially horizontal bottom surface of the bottom of the ship, the fin storage means with the guide rail is provided. There is an advantage that the fin and its mounting member do not get in the way when entering.
[0009]
Furthermore , if the distance between the front edge of the fin and the bottom bottom of the stern is larger than the distance between the rear edge of the fin and the bottom bottom of the stern, it will be more The action of shifting the flow of water along the substantially horizontal bottom surface of the front of the ship so as to follow the bottom surface of the bottom of the stern inclined is more accurately performed.
[0010]
And when both the said fin and the attachment member of the said fin have a streamline cross section, the increase in resistance by these fins and an attachment member will be reduced at the time of navigation .
[0011]
Further, the ship with the propulsion performance improving device of the present invention is a ship having a buttocks hull shape so that the bottom bottom surface of the stern portion gently rises toward the stern end, so that it hangs down from the rear portion of the stern portion into the water. In order to guide the flow of water along the bottom bottom surface, which is substantially horizontal ahead of the stern, along the bottom bottom of the bottom of the stern during navigation, and to flow into the propulsion unit , a substantially horizontal vessel bottom lower surface of the forward somewhat from at least the aft portion, sailing at the uneven surface is formed for generating a turbulent boundary layer, on the Symbol uneven surface on the movable member ship bottom recess having a bottom The movable member driving means is provided for being fitted and for driving the movable member at the time of anchoring to draw the concave and convex surface of the movable member into the concave portion of the ship bottom.
[0012]
As described above, in a ship having a buttocks hull form, when a turbulent boundary layer is formed at the time of navigation by forming an uneven surface on a substantially horizontal bottom surface slightly ahead of the stern, Propellers of propulsion devices such as pod propellers that flow along the bottom of the bottom of the stern without being separated and follow the bottom of the bottom of the stern with no inclination. As a result, water is appropriately introduced into the vehicle, and propulsion performance is improved.
[0013]
On the other hand, for the inboard space, since the inclination angle of the bottom surface of the stern bottom in the buttocks can be set to be considerably large, there is an advantage that a margin is generated and the arrangement of the engine and the cargo hold is facilitated.
[0014]
In addition, a movable member driving means is provided in which the movable member having the concave and convex surface on the lower side is fitted into the bottom of the ship bottom, and the concave and convex surface is drawn into the bottom of the bottom of the ship by driving the movable member when entering the ship. As a result, it is possible to obtain the advantage of handling without problems as in the case of a conventional ship having no uneven surface .
[0015]
DETAILED DESCRIPTION OF THE INVENTION
1 to 6 show a ship with a propulsion performance improving device as a first embodiment of the present invention. FIG. 1 is a side view showing the rear part of the hull. 2 is a cross-sectional view taken along line AA in FIG. 1, FIG. 3 is a cross-sectional view taken along line BB in FIG. 2, FIG. 4 is a cross-sectional view taken along CC in FIG. 6 is a cross-sectional view taken along the line DD of FIG. 5, FIG. 7 is a rear side view of the hull of a ship with a propulsion performance improving device as a second embodiment of the present invention, and FIG. 8 is a ship of FIG. longitudinal sectional view showing the storage condition of propulsion performance enhancing apparatus in FIG. 9 Ru longitudinal sectional view showing an operating state of the propulsion performance enhancing apparatus of FIG.
[0016]
First, a first embodiment of the present invention will be described. As shown in FIGS. 1 and 2, in a ship having a buttocks hull shape in which the bottom bottom surface 1 of the stern portion is inclined so as to rise gently toward the stern end, A pod propeller 2 as a propulsion device mounted so as to hang down from the rear part of the water is equipped.
[0017]
Further, at the time of sailing, the water flow along the bottom bottom surface 3 which is substantially horizontal ahead of the stern portion can be guided along the bottom bottom surface 1 inclined to the stern portion to flow into the propeller 2a of the pod propeller 2, Fins 4 are mounted via attachment members 5 in the vicinity of the front end portion of the bottom bottom surface 1 inclined at the stern portion so as to be separated from the bottom bottom surface 1.
And the attachment member 5 and the fin 4 have the streamline cross section for guide | inducing the flow of water smoothly, as shown in FIG. 3 and FIG. 4, respectively.
[0018]
The bottom bottom surface 1 of the stern portion has a considerably large inclination angle α as a buttocks hull form in order to provide a space in the ship, but the fin 4 has an angle of attack larger than the inclination angle α of the bottom surface 1 of the stern bottom portion. So that the distance between the front edge of the fin 4 and the stern bottom bottom surface 1 is larger than the distance between the rear edge of the fin 4 and the stern bottom bottom 1.
In addition, the fin 4 has the stable wing | blade 4a which curved up diagonally upward at the right-and-left end, respectively.
[0019]
In the present embodiment, the fin storage means with guide rails is provided so that the fin 4 can be moved along the guide rail 6 with the hull together with the mounting member 5 when the ship enters, and can be stored above the substantially horizontal bottom surface 3 of the bottom of the ship. Is provided.
[0020]
FIG. 5 and FIG. 6 show an example of the fin storage means with guide rails. The attachment member 5 of the fin 4 is fixed to the endless wire 8 driven by the motor 7 through the sheaves 9-12. At the stop position 4, the fin 4 is fixed by the hydraulic stopper 13.
[0021]
In the boat with the propulsion performance improving device of the first embodiment described above, the fins 4 are separated from the bottom bottom surface 1 in the vicinity of the front end portion of the bottom bottom surface 1 inclined so as to rise gently toward the stern end at the stern portion. Therefore, even if the inclination angle α of the stern bottom bottom surface 1 is set to be considerably large in the buttocks, the water flow along the bottom bottom surface 3 in the center of the hull is maintained during navigation. 1 smoothly flows without causing separation, and is appropriately introduced into the propeller 2a of the pod propeller 2 suspended from the rear portion of the stern portion into the water, so that the propulsion performance is improved. And since the inclination | tilt angle (alpha) of the stern bottom bottom surface 1 can be set largely, the shipboard space becomes large and the advantage that engine arrangement | positioning and cargo hold arrangement | positioning become easy will be acquired.
[0022]
Moreover, since the space | interval of the front edge part of the fin 4 and the stern bottom surface 1 of a stern part is formed larger than the space | interval of the rear edge part of the fin 4 and the stern bottom surface 1 of a stern part, it is larger than a stern part at the time of navigation. The action of shifting the flow of water along the substantially horizontal bottom surface 3 at the front of the ship along the bottom surface 1 inclined at the stern portion is more accurately performed.
[0023]
Since both the fin 4 and the attachment member 5 of the fin 4 have a streamlined cross section, an increase in resistance due to the fin 4 and the attachment member 5 is reduced during navigation.
[0024]
In addition, since the fin 4 is moved along the guide rail 6 together with the mounting member 5 so as to be stored above the substantially horizontal bottom surface 3 of the ship bottom, the fin storage means with guide rail is provided. 4 and its mounting member 5 can be advantageously prevented from getting in the way.
[0025]
Next, a second embodiment of the present invention will be described. As shown in FIG. 7, in this embodiment as well, the buttocks hull form is inclined so that the bottom bottom surface 1 of the stern portion gently rises toward the stern end. A pod propeller 2 as a propulsion device is provided so as to hang down into the water from the rear part of the stern part.
[0026]
And during navigation, in order to guide the flow of water along the substantially bottom bottom surface 3 in front of the stern portion along the bottom bottom surface 1 inclined to the stern portion, at least substantially horizontal slightly ahead of the stern portion. An uneven surface 20 that generates a turbulent boundary layer during navigation is formed on the bottom surface 3 of the ship bottom.
[0027]
Although this uneven surface 20 may be a fixed type, in this embodiment, as shown in FIGS. 8 and 9, the movable member 21 having the uneven surface 20 on the lower side can slide up and down in the ship bottom recess 22. In addition, a movable member driving means for driving the movable member 21 and retracting the concave and convex surface 20 on the lower side of the movable member 21 into the ship bottom concave portion 22 is provided.
[0028]
That is, by guiding the water in the tank 24 to the space 23 between the movable member 21 and the ship bottom concave portion 22 through the valve 26 by the pump 25, the movable member 21 is pressed downward by the water pressure, and the uneven surface 20 the as well as being able to protrude from the vessel bottom lower surface downwards, so that it is possible to retract the movable member 21 into the vessel bottom recess 22 by sucking water in the space 23 by the pump 25.
Further, a stopper mechanism 27 is provided so that the movable member 21 can be prevented from falling off.
[0029]
In the second embodiment described above, in a ship having a buttocks hull form, the turbulent boundary layer is formed at the time of navigation by forming the irregular surface 20 on the substantially horizontal bottom surface 3 slightly ahead of the stern. Therefore, the flow of water along the horizontal bottom surface 3 of the bottom of the stern becomes along the sloped bottom surface 1 of the bottom of the stern without causing separation, and thus the pod suspended from the rear of the stern to the water. Propeller 2 is appropriately supplied with water into propeller 2a, and propulsion performance is improved.
[0030]
On the other hand, with respect to the inboard space, since the inclination angle α of the bottom surface of the stern bottom in the buttocks can be set to be considerably large, there is an advantage that a margin is generated and the arrangement of the engine and the cargo hold is facilitated.
[0031]
Further, a movable member driving means for causing a movable member 21 having a concave and convex surface 20 on the lower side to be fitted into the bottom bottom recess 22 and for pulling the concave and convex surface 20 into the bottom bottom concave portion 22 by driving the movable member 21 when entering the ship. Therefore, the advantage of being able to handle without trouble as in the case of a conventional ship that does not have the uneven surface 20 can be obtained during the docking operation.
[0032]
【The invention's effect】
As described above in detail, according to the ship with the propulsion performance improving device of the present invention, the following effects can be obtained.
(1) Since the fins are attached to the bottom of the bottom of the bottom of the ship, which are inclined so as to rise gently toward the stern at the stern, via the attachment members so as to be separated from the bottom of the bottom of the stern, Even when the inclination angle of the lower surface is set to be quite large, the water flow along the bottom surface of the bottom of the hull in the middle of the hull flows smoothly without separation to the bottom surface of the bottom of the stern during navigation. The propulsion performance is improved by being properly introduced into the propeller of the propulsion device installed vertically. And since the inclination angle of the bottom surface of the stern bottom can be set large, the inboard space is widened, and the advantages of facilitating engine arrangement and cargo hold arrangement can be obtained. Further, since the fin is moved along the guide rail together with the mounting member and is stored above the substantially horizontal bottom surface of the ship bottom, the fin storage means with guide rail is provided. And the advantage that the attachment member does not get in the way when entering.
(2) If the distance between the front edge of the fin and the bottom bottom of the stern is larger than the distance between the rear edge of the fin and the bottom bottom of the stern, the stern In addition, the action of shifting the water flow along the substantially horizontal bottom surface of the front of the ship along the inclined bottom surface of the stern is more accurately performed.
(3) When both the fin and the attachment member of the fin have a streamlined cross section, an increase in resistance due to the fin and the attachment member is reduced during navigation.
( 4 ) In a ship having a buttocks hull form, if a turbulent boundary layer is formed during navigation by forming an uneven surface on the bottom surface of the ship that is almost horizontal slightly ahead of the stern, The flow of water along the bottom surface follows the slanted bottom of the bottom of the stern without causing separation, and in this way to the propeller of a propulsion device such as a pod propeller that hangs underwater from the rear of the stern. Proper performance is achieved by properly flowing water. On the other hand, for the inboard space, since the inclination angle of the bottom surface of the stern bottom in the buttocks can be set to be considerably large, there is an advantage that a margin is generated and the arrangement of the engine and the cargo hold is facilitated.
( 5 ) A movable member driving means is provided for fitting the movable member having the uneven surface on the lower side into the bottom of the ship, and pulling the uneven surface into the bottom of the ship by driving the movable member when entering the ship. since it has, during docking operations, so the advantages that can be handled without any trouble like the conventional ship that does not have the irregular surface is obtained.
( 6 ) According to the above items, according to the ship with the propulsion performance improving device of the present invention, even if the inclination angle of the bottom bottom of the stern part in the buttocks is set to be considerably large, the flow of water along the bottom bottom of the ship bottom is maintained during navigation. It is possible to guide smoothly so that the flow into the propeller is not hindered.
[Brief description of the drawings]
FIG. 1 is a side view showing a rear part of a hull of a ship with a propulsion performance improving device as a first embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along the line AA in FIG.
3 is a cross-sectional view taken along the line BB in FIG.
4 is a cross-sectional view taken along the line CC of FIG.
5 is a longitudinal sectional view showing fin storage means with guide rails in the ship with the propulsion performance improving device of FIG. 1; FIG.
6 is a cross-sectional view taken along the line DD in FIG.
FIG. 7 is a side view of the rear part of the hull of a ship with a propulsion performance improving device as a second embodiment of the present invention.
8 is a longitudinal sectional view showing a retracted state of the propulsion performance improving device in the ship of FIG.
9 is a longitudinal sectional view showing an operating state of the propulsion performance improving apparatus of FIG.
FIG. 10 is a rear side view of a hull of a ship having a conventional buttocks hull form.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Stern part bottom bottom 2 Pod propeller 2a Propeller 3 Horizontal bottom bottom front ahead of stern 4 Fin 4a Stabilization wing 4b Spindle 5 Mounting member 6 Guide rail 7 Motor 8 Endless wire 9-12 Sheave
13 Hydraulic stopper
20 Uneven surface
21 Movable parts
22 Ship bottom recess
23 space
24 tanks
25 Pump
26 Valve
27 Stopper mechanism

Claims (4)

船尾部の船底下面が船尾端へ向かって緩やかに上昇するように傾斜したバトック船型を有する船舶において、上記船尾部の後部から水中へ垂下するように設けられた推進装置を備え、航行時に船尾部よりも前方のほぼ水平な船底下面に沿う水の流れを上記船尾部の傾斜した船底下面へ沿わせるように導いて上記推進装置へ流入させるべく、上記船尾部の傾斜した船底下面の前端部付近に、同船底下面から離隔するようにして取付け部材を介し装着されたフィンが設けられており、入渠時に上記フィンを上記取付け部材と共に船体付きガイドレールに沿い移動させて前記のほぼ水平な船底下面よりも上方に格納するためのガイドレール付きフィン格納手段が設けられたことを特徴とする、推進性能向上装置付き船舶。In a ship having a buttocks hull shape inclined so that the bottom bottom surface of the stern part gradually rises toward the stern end, it is provided with a propulsion device provided to hang down from the rear part of the stern part to the stern part during navigation. Near the front end of the bottom bottom inclined bottom of the stern to guide the water flow along the bottom bottom of the bottom of the stern ahead and to flow along the bottom bottom inclined bottom of the stern. And a fin mounted through a mounting member so as to be separated from the bottom surface of the bottom of the ship. A ship with a propulsion performance improving device, characterized in that fin storage means with guide rails for storing upward is provided . 請求項１に記載の推進性能向上装置付き船舶において、上記フィンの前縁部と上記船尾部の船底下面との間隔が、上記フィンの後縁部と上記船尾部の船底下面との間隔よりも大きく形成されたことを特徴とする、推進性能向上装置付き船舶。  The ship with a propulsion performance improving device according to claim 1, wherein a distance between the front edge portion of the fin and the bottom bottom surface of the stern portion is greater than a distance between the rear edge portion of the fin and the bottom bottom surface of the stern portion. A ship with a propulsion performance improvement device, characterized by being formed large. 請求項１または２に記載の推進性能向上装置付き船舶において、上記フィンが上記水の流れを円滑に導くための流線形断面を有するとともに、上記取付け部材も流線形断面を有していることを特徴とする、推進性能向上装置付き船舶。  The ship with a propulsion performance improving device according to claim 1 or 2, wherein the fin has a streamline cross section for smoothly guiding the flow of water, and the mounting member also has a streamline cross section. Characterized ship with propulsion performance improvement device. 船尾部の船底下面が船尾端へ向かって緩やかに上昇するように傾斜したバトック船型を有する船舶において、上記船尾部の後部から水中へ垂下するように設けられた推進装置を備え、航行時に船尾部よりも前方のほぼ水平な船底下面に沿う水の流れを上記船尾部の傾斜した船底下面へ沿わせるように導いて上記推進装置へ流入させるべく、少なくとも上記船尾部よりやや前方のほぼ水平な船底下面に、航行時に乱流境界層を発生させるための凹凸面が形成されており、上記凹凸面を下側に有する可動部材が船底凹部に嵌め込まれるとともに、入渠時に上記可動部材を駆動して同可動部材の凹凸面を上記船底凹部内へ引き込ませるための可動部材駆動手段が設けられたことを特徴とする、推進性能向上装置付き船舶。In a ship having a buttocks hull shape inclined so that the bottom bottom surface of the stern part gradually rises toward the stern end, it is provided with a propulsion device provided to hang down from the rear part of the stern part to the stern part during navigation. In order to guide the flow of water along the bottom surface of the bottom of the stern that is in front of the stern along the bottom surface of the bottom of the stern that is inclined, and to flow into the propulsion device, the bottom of the boat that is substantially horizontal at least slightly in front of the stern An uneven surface for generating a turbulent boundary layer at the time of navigation is formed on the lower surface, and a movable member having the uneven surface on the lower side is fitted in the bottom of the ship, and the movable member is driven to enter A marine vessel with a propulsion performance improving device, characterized in that movable member driving means for pulling the concave and convex surface of the movable member into the ship bottom concave portion is provided .
JP2002303253A 2002-10-17 2002-10-17 Ship with propulsion performance improvement device Expired - Lifetime JP3721401B2 (en)

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JPS51146088A (en) * 1975-06-06 1976-12-15 Mitsui Eng & Shipbuild Co Ltd Means for reducing fluid resistance
JPS58135395U (en) * 1982-03-08 1983-09-12 三井造船株式会社 Battsukuflo - ship type with a stern
JPS6072798U (en) * 1983-10-27 1985-05-22 三菱重工業株式会社 ship finned skeg

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