JPS62137289A - Bilge keel with rear extension part - Google Patents
Bilge keel with rear extension partInfo
- Publication number
- JPS62137289A JPS62137289A JP27754085A JP27754085A JPS62137289A JP S62137289 A JPS62137289 A JP S62137289A JP 27754085 A JP27754085 A JP 27754085A JP 27754085 A JP27754085 A JP 27754085A JP S62137289 A JPS62137289 A JP S62137289A
- Authority
- JP
- Japan
- Prior art keywords
- propeller
- bilge keel
- water flow
- hull
- stern
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
- B63B39/06—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
- B63B39/06—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water
- B63B2039/067—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water effecting motion dampening by means of fixed or movable resistance bodies, e.g. by bilge keels
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、船体の船底弯曲部にそなえられるビルジキー
ルに関し、特にプロペラ（螺旋推進器）に流入する水流
を整流するための後方延長部をそなえたビルジキールに
関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a bilge keel provided at the curved bottom of a ship, and particularly to a bilge keel provided with a rear extension portion for rectifying water flow flowing into a propeller (helical propulsion device). Regarding the bilge keel.
一般に、船尾部の水流の流速分布は第３図に示すように
なっており、プロペラ２上部付近では、このプロペラ２
への水流の流入速度は遅く、プロペラ２下部付近では同
水流の流入速度が速くなっている。Generally, the flow velocity distribution of the water flow at the stern part is as shown in Figure 3, and near the top of propeller 2,
The inflow speed of the water flow is slow, and the inflow speed of the water flow is high near the bottom of the propeller 2.
なお、第３図中において、符号６はスターンフレーム、
７はボツシング、８はシューピース、ＶＸは水流の船体
に対する船体長手方向速度成分、■は船速を示すほか、
実線で示す速度分布線は軽荷状態での流速分布状態であ
り、破線で示す速度分布線は満載状態での流速分布状態
である。In addition, in FIG. 3, the reference numeral 6 indicates a stern frame;
7 is the bottoming, 8 is the shoe piece, VX is the longitudinal velocity component of the water flow relative to the hull, ■ is the ship speed, and
The speed distribution line shown as a solid line is the flow velocity distribution state in a light loaded state, and the speed distribution line shown as a broken line is the flow velocity distribution state in a fully loaded state.
このような速度分布の不均一な水流の中でプロペラ２が
回転すると大きな変動圧力を受けるため、振動が発生し
、船体に伝播されること４二なる。When the propeller 2 rotates in such a water flow with an uneven velocity distribution, it is subjected to large fluctuating pressure, which generates vibrations that are propagated to the hull.
この船体振動を減少させるために、従来、第・１〜６図
に示すように、船側からプロペラ２上方にかけてスター
ントンネルフィン１１を船体４（こ取り付けている。In order to reduce this hull vibration, a stern tunnel fin 11 is conventionally attached to the hull 4 from the ship side to above the propeller 2, as shown in FIGS. 1 to 6.
このようなスターントンネルフィン１１を取り付けるこ
とにより、船側からの水流をスターンをンネルフイン１
１に沿ってプロペラ２上方へ導けるため、水流の遅かっ
た部分の水流が速くなり、プロペラ２に流入する水流の
速度分布が平滑化され、流速分布の不均一による船体振
動を軽減することができる。By installing such a stern tunnel fin 11, the water flow from the ship side can be diverted from the stern to the stern tunnel fin 1.
1 above the propeller 2, the water flow becomes faster in areas where the water flow was slow, the speed distribution of the water flow flowing into the propeller 2 is smoothed, and ship vibration due to uneven flow speed distribution can be reduced. .
なお、：５４図にすｊいてプロペラ２は図示を省略され
ている。Note that the propeller 2 is not shown in Figure 54.
しかしながら、上述のように、スターントンネルフィン
１１を取り付ける従来の手段では、スターントンネルフ
ィン１１が、構造物として大きなもので重いほか、この
スターントンネルフィン１１を取り付ける場所が船尾部
の曲面の変化の大きい部分であるため、その取付作業に
困難を要するとともに、コス）・高を招くという問題点
がある。However, as described above, in the conventional means of attaching the stern tunnel fin 11, the stern tunnel fin 11 is large and heavy as a structure, and the stern tunnel fin 11 is attached at a location where the curved surface of the stern section has a large change. Since it is a part, there are problems in that the installation work is difficult and costs are high.
また、スターン１ンネルフイン１１自身が推進性能上の
大きな抵抗となるという問題点もある。Furthermore, there is also the problem that the stern 1 neck fin 11 itself becomes a major drag on propulsion performance.
ところで、第７図に示すように、従来、船体４には、同
船体４の横揺れを軽減するために、ビルジキール１′が
そなえられる場合がある。このビルジキール１′は、通
常、船体４の船長の約４分の１程度の長さを有して、船
体４の船底弯曲部に取り付けられているが、上記横揺れ
の軽減以外の目的では使用されていない。By the way, as shown in FIG. 7, conventionally, the hull 4 is sometimes provided with a bilge keel 1' in order to reduce rolling of the hull 4. This bilge keel 1' normally has a length of about one-fourth of the length of the ship's length and is attached to the curved bottom of the ship's hull 4, but it is used for purposes other than reducing the above-mentioned rolling. It has not been.
本発明は、上述の問題点の解決をはかろうとするもので
、ビルジキールを用いて、プロペラに流入する水流の整
流を行なえるようにして、船体抵抗の増加を招くことな
く、容易かつ低コストで船体振動の軽減をはがれるよう
にした、後方延長部付きビルジキールを提供することを
目的とする。The present invention aims to solve the above-mentioned problems, and uses a bilge keel to straighten the water flow flowing into the propeller, thereby easily and at low cost without causing an increase in hull resistance. The purpose of the present invention is to provide a bilge keel with an aft extension that can be peeled off to reduce hull vibration.
このため、本発明の後方１艮部付きビルジキールは、船
体の船底弯曲部にビルジキールをそなえ、同ビルジキー
ルの後方への延長部が、船尾のプロペラの上方付近にま
で配設されていることを特徴としている。For this reason, the bilge keel with one aft part of the present invention is characterized in that the bilge keel is provided at the bottom curved part of the hull, and the rearward extension part of the bilge keel is disposed near above the propeller at the stern. It is said that
上述の本発明の後方延長部付きビルジキールでは、船体
の船底弯曲部にそなえられたビルジキールの後方への延
長部が船尾のプロペラの上方付近にまで配設されている
ため、航走中に船体前方で発生する船底部に潜り込む水
流が同ビルジキールに沿ってプロペラ上方へ導かれ、プ
ロペラ上部の水流の流速が速くなり、プロペラに流入す
る水流の流速分布が平滑化される。In the above-mentioned bilge keel with rear extension part of the present invention, the rear extension part of the bilge keel provided at the bottom curved part of the hull is disposed near above the propeller at the stern, so that the front part of the hull is The water flow that is generated under the bottom of the ship is guided above the propeller along the bilge keel, increasing the flow velocity of the water flow above the propeller, and smoothing the flow velocity distribution of the water flow flowing into the propeller.
以下、図面により本発明の一実施例としての後方延長部
付きビルジキールについて説明すると、：ｊＳ１図は同
ビルジキールをそなえた船舶の斜視図、第２図は同船舶
の船尾部を拡大して示す斜視図である。Below, a bilge keel with a rear extension part as an embodiment of the present invention will be explained with reference to the drawings: Figure S1 is a perspective view of a ship equipped with the bilge keel, and Figure 2 is an enlarged perspective view of the stern of the ship. It is a diagram.
第１．２図に示すように、船体４の船底弯曲部には、Ｑ
Ｈ３Ｈ２Ｏ２揺れを軽減するための左右一対のビルジキ
ール１．１が設けられており、各ビルジキール１には、
後方へ向かいプロペラ２の上部ｆ・Ｙ近まで到達するよ
うに、延長部１ａが接続されている。As shown in Figure 1.2, the curved bottom of the hull 4 has a Q
A pair of left and right bilge keels 1.1 are provided to reduce H3H2O2 shaking, and each bilge keel 1 has a
The extension part 1a is connected so as to go rearward and reach near the upper part f/Y of the propeller 2.
なお、第１図において符号３は舵、５は水流を示し、第
２図において開館３は図示を省略されている。In FIG. 1, reference numeral 3 indicates a rudder, and 5 indicates a water flow, and in FIG. 2, the opening 3 is omitted from illustration.
本発明の一実施例としての後方延長部付きビルジキール
は上述のごとく構成されているので、船舶の航走中、船
体４＠方からの水流５は、ビルジキール１．１に沿って
、同ビルジキール１，１延艮部Ｌａ、１ａに導かれ、プ
ロペラ２の上方に流入すこれにより、従来、水流の流速
の遅かったプロペラ２上方の流速を速めることができ、
プロペラ２付近の不均一であった水流の流速分布が均一
化されるため、同水流中で回転するプロペラ２が大きな
変動圧力を受けなくなり、同プロペラ２の円周方向のス
ラスＦ発生の変化が小さく、船体振動が軽減されて船体
４における居住性が向上する。Since the bilge keel with the rear extension part as an embodiment of the present invention is configured as described above, the water flow 5 from the hull 4 is directed along the bilge keel 1.1 while the ship is running. , 1 is guided to the extension portions La, 1a and flows above the propeller 2. As a result, the flow velocity above the propeller 2, where the flow velocity of the water flow was conventionally slow, can be increased.
Since the flow velocity distribution of the water flow, which was uneven near the propeller 2, is now made uniform, the propeller 2 rotating in the same water flow is no longer subject to large fluctuating pressure, and changes in the generation of thrust F in the circumferential direction of the propeller 2 are reduced. This reduces hull vibration and improves the comfort of the hull 4.
また、船体振動が軽減されるため、耐振用の補強部材が
不要となる。Furthermore, since hull vibration is reduced, vibration-proof reinforcing members are not required.
さらに、ビルジキール１が延長されることにより、ビル
ジキール１本来の作用によって船体・１の横揺れをより
確実に軽減できるようになる。Furthermore, by extending the bilge keel 1, it becomes possible to more reliably reduce the rolling of the ship body 1 by the original action of the bilge keel 1.
その上、従来の手段で用いたスターントンネルフィン（
第４〜６図の符号１１参照）に比べ、本実施例では、ビ
ルジキール１をプロペラ２上刃まで延長するという極め
て低コストで容易な工作により、水流を効率よくプロペ
ラ２上方へ導くことができるほか、構造的にも小型・軽
量になるとともに、プロペラ２へ流入する流速が平滑化
されるので、推進効率が大幅に高められるのである。Moreover, the stern tunnel fins (
(See reference numeral 11 in Figs. 4 to 6), in this embodiment, the water flow can be efficiently guided above the propeller 2 by extending the bilge keel 1 to the upper blade of the propeller 2, which is an extremely low-cost and easy operation. In addition, the structure is smaller and lighter, and the flow velocity flowing into the propeller 2 is smoothed, so propulsion efficiency is greatly increased.
以上詳述したように、本発明の後方延長部付きビルジキ
ールによれば、船体の船底弯曲部にビルジキールをそな
え、同ビルノキールの後方への延長部が、船尾のプロペ
ラの上方付近にまで配設されるという簡素な構成で、船
舶の航走中、船体前方からの水流をビルジキールおよび
その延長部に沿ってプロペラの上方に導くことができ、
これによりプロペラ付近の水流の流速分布を均一化でき
るので、同水流中で回転するプロペラが大きな変動圧力
を受けなくなり、船体振動が大幅に軽減し、船体におけ
る居住性が高められるのである。 また、ビルジキール
が延長されることにより、ビルジキール本来の作用によ
って船体の′ＷＬ揺れをより確実に軽減することがでと
る。As described in detail above, according to the bilge keel with the rear extension part of the present invention, the bilge keel is provided at the bottom curved part of the hull, and the rear extension part of the bilge keel is arranged up to near above the propeller at the stern. With this simple configuration, water flow from the front of the ship can be guided above the propeller along the bilge keel and its extension while the ship is sailing.
This makes it possible to equalize the flow velocity distribution of the water flow near the propeller, so the propeller rotating in the same water flow is no longer subject to large fluctuating pressures, significantly reducing hull vibration and improving the comfort of the hull. Further, by extending the bilge keel, the 'WL shaking of the hull can be more reliably reduced by the original action of the bilge keel.
さらに、ビルジキールをプロペラ上方まで延長するとい
う極めて低コストで容易な工作により、水流を効率よく
プロペラ上方へ導くことができるほか、船体抵抗の増加
を招くことなく、プロペラへ流入する流速が平滑化さ７
”Ｌるので、推進効率が大幅に高められる利点らある。Furthermore, by extending the bilge keel above the propeller, which is an extremely low-cost and easy process, water flow can be efficiently guided above the propeller, and the flow velocity flowing into the propeller can be smoothed out without increasing hull resistance. 7
``L, so it has the advantage of greatly increasing propulsion efficiency.
第１．２図は本発明の一実施例としての後方延長部付き
ビルジキールを示すもので、第１図は同ビルノキールを
そなえた船舶の斜視図、′：ｊＳ２図は同船舶の船尾部
を拡大して示す斜視図であり、第３図は通常の船舶の船
舶航走中におけるプロペラ付近の水流の流速分布図であ
り、ｆｊＳ ４ ＝ ６図は従来のスターントンネルフ
ィンによる船体振動防止手段を示すもので、ｆ５４図は
そのスターントンネルフィンをそなえた船舶の船尾部を
示す斜視図、第５図は同船尾部の側面図、第６図は第５
図の■−■矢視断面図であり、第７図は従来のビルジキ
ールをそなよた船舶の斜視図である。
１・・ビルジキール、１ａ・・ビルジキールの延長部、
２・・プロペラ、３・・舵、４・・船体、５・・水流。
復代理人 弁理士 飯 沼 義 彦
第１図
第２図
第３図
第４ 図
第５図
■４
第 ６ 図
第７図Figure 1.2 shows a bilge keel with a rear extension as an embodiment of the present invention, Figure 1 is a perspective view of a ship equipped with the bilge keel, and Figure 1.2 is an enlarged view of the stern of the ship. Fig. 3 is a flow velocity distribution diagram of the water flow near the propeller of a normal ship during navigation, and Fig. 3 shows a conventional ship vibration prevention means using stern tunnel fins Fig. f54 is a perspective view of the stern of the ship equipped with the stern tunnel fin, Fig. 5 is a side view of the stern, and Fig. 6 is a perspective view of the stern of the ship equipped with the stern tunnel fin.
It is a sectional view taken along the line ■-■ in the figure, and FIG. 7 is a perspective view of a ship swinging a conventional bilge keel. 1...Bilge keel, 1a...Bilge keel extension,
2. Propeller, 3. Rudder, 4. Hull, 5. Water flow. Sub-Agent Patent Attorney Yoshihiko Iinuma Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 ■4 Figure 6 Figure 7
Claims (1)
ールの後方への延長部が、船尾のプロペラの上方付近に
まで配設されていることを特徴とする、後方延長部付き
ビルジキール。A bilge keel with an aft extension section, characterized in that a bilge keel is provided at the bottom curved part of the hull, and the aft extension part of the bilge keel is arranged up to near above the propeller at the stern.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27754085A JPS62137289A (en) | 1985-12-10 | 1985-12-10 | Bilge keel with rear extension part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27754085A JPS62137289A (en) | 1985-12-10 | 1985-12-10 | Bilge keel with rear extension part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62137289A true JPS62137289A (en) | 1987-06-20 |
Family
ID=17584971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27754085A Pending JPS62137289A (en) | 1985-12-10 | 1985-12-10 | Bilge keel with rear extension part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62137289A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007238007A (en) * | 2006-03-10 | 2007-09-20 | Yanmar Co Ltd | Bilge keel for ship |
| JP2010052614A (en) * | 2008-08-29 | 2010-03-11 | Shin Kurushima Dockyard Co Ltd | Bilge keel |
| JP2015098214A (en) * | 2013-11-18 | 2015-05-28 | ジャパンマリンユナイテッド株式会社 | Fin device and craft |
| US20170341715A1 (en) * | 2013-06-26 | 2017-11-30 | Cefront Technology As | Cargo Transfer Vessel |
| JP2018103917A (en) * | 2016-12-27 | 2018-07-05 | ジャパンマリンユナイテッド株式会社 | Fin device and vessel |
| CN109229297A (en) * | 2018-09-26 | 2019-01-18 | 上海船舶研究设计院（中国船舶工业集团公司第六0四研究院） | The bilge keelson and ship of Trapezoidal |
-
1985
- 1985-12-10 JP JP27754085A patent/JPS62137289A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007238007A (en) * | 2006-03-10 | 2007-09-20 | Yanmar Co Ltd | Bilge keel for ship |
| JP4625888B2 (en) * | 2006-03-10 | 2011-02-02 | ヤンマー株式会社 | Marine bilge keel |
| JP2010052614A (en) * | 2008-08-29 | 2010-03-11 | Shin Kurushima Dockyard Co Ltd | Bilge keel |
| US20170341715A1 (en) * | 2013-06-26 | 2017-11-30 | Cefront Technology As | Cargo Transfer Vessel |
| US10526046B2 (en) * | 2013-06-26 | 2020-01-07 | Sealoading Holding As | Cargo transfer vessel |
| JP2015098214A (en) * | 2013-11-18 | 2015-05-28 | ジャパンマリンユナイテッド株式会社 | Fin device and craft |
| JP2018103917A (en) * | 2016-12-27 | 2018-07-05 | ジャパンマリンユナイテッド株式会社 | Fin device and vessel |
| WO2018123756A1 (en) * | 2016-12-27 | 2018-07-05 | ジャパンマリンユナイテッド株式会社 | Fin device and ship |
| CN109229297A (en) * | 2018-09-26 | 2019-01-18 | 上海船舶研究设计院（中国船舶工业集团公司第六0四研究院） | The bilge keelson and ship of Trapezoidal |
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