JPS6146789A - Split type bilge keel - Google Patents
Split type bilge keelInfo
- Publication number
- JPS6146789A JPS6146789A JP17028384A JP17028384A JPS6146789A JP S6146789 A JPS6146789 A JP S6146789A JP 17028384 A JP17028384 A JP 17028384A JP 17028384 A JP17028384 A JP 17028384A JP S6146789 A JPS6146789 A JP S6146789A
- Authority
- JP
- Japan
- Prior art keywords
- bilge
- bilge keel
- keel
- ship
- hull
- 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)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、船体のビルジ部（船底弯曲部）に沿って突設
されるビルジキールに関し、特に断続的にビルジキール
部材を用いるようにした分割式ビルジキールに関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a bilge keel that protrudes along the bilge portion (curved bottom portion) of a ship, and particularly relates to a split type keel that uses bilge keel members intermittently. Concerning the bilge keel.
一般に船舶においてはビルジ部に沿って、それに直角に
突出させたビルジキールを設けることによって、船体の
動揺を軽減することが行なわれている。Generally, in ships, a bilge keel is provided along the bilge portion and protrudes at right angles thereto to reduce the shaking of the ship body.
従来のビルジキールとしては、第８図（船体側面図）、
第９図（第８図のＩＸ−ＩＸ矢視断面図）および第１０
図＜１，８図のＸ−χ矢視断面図）に示すようなものが
あり、船体１のビルジ部に沿い、ビルジキール５が突設
されている。Conventional bilge keels are shown in Figure 8 (hull side view),
Figure 9 (cross-sectional view taken along arrow IX-IX in Figure 8) and Figure 10
There is one as shown in FIG.
なお、第８〜１０図は船舶の満載状態を示しているが、
第１１図（船体側面図）および第１２図（第１１図の■
−■矢視断面図）では船舶のバラスト状態を示している
。Although Figures 8 to 10 show the ship in a fully loaded state,
Figure 11 (hull side view) and Figure 12 (■ in Figure 11)
-■ cross-sectional view) shows the ballast condition of the ship.
また、第８〜１２図中の符号２は船体上部構造、３はプ
ロペラ、４は舵、６は水面、７は船底流の流線を示して
いる。Further, in FIGS. 8 to 12, reference numeral 2 indicates the upper structure of the hull, 3 indicates the propeller, 4 indicates the rudder, 6 indicates the water surface, and 7 indicates the flow line of the bottom flow.
ところで、第８〜１０図に示すような満載状態での航行
時には、船底流の流＃ｉＩ７で示すように船体表面に沿
う流れが、船体前半部においては船側からビルジ部を回
り込んで船底下面へ流れ込み、船体後半部においては船
底下面からビルジ部をとおり、船側へ向かうようになる
。By the way, when sailing in a fully loaded state as shown in Figures 8 to 10, the flow along the hull surface flows from the ship's side in the front half of the hull, as shown by flow #iI7, and flows around the bilge section to the underside of the hull. In the rear half of the ship, it flows from the bottom of the ship through the bilge and towards the ship's side.
したがって、ビルジキール５の前端部においては、第９
図に示すように、船底流の流線７がビルジキール５を上
方から下方へ横切るようになり、またビルジキール５の
後端部においては、第１０図に示すように、船底流の流
線７がビルジキール５を下方から上方へ横切るようにな
るので、ビルジキール５を回り込む流れが剥離して渦を
生じ、船体抵抗の増加を招くという問題点がある。Therefore, at the front end of the bilge keel 5, the ninth
As shown in the figure, streamlines 7 of the bottom flow cross the bilge keel 5 from above to below, and at the rear end of the bilge keel 5, as shown in FIG. Since the flow crosses the bilge keel 5 from below to above, there is a problem in that the flow that wraps around the bilge keel 5 separates and creates a vortex, leading to an increase in hull resistance.
また、第１１．１２図に示すようなバラスト状態での航
行時には、船体１が船尾トリムになっているため、船底
流の流線７で示すように、船底下面からビルジ部を回り
、船側へ上がってくる流れが多くなる。このような流れ
は、ビルジキール５を横切って流れるので、流れの剥離
による渦を生じて船体抵抗の増加を引き起こすという問
題点がある。In addition, when sailing in a ballast state as shown in Figure 11.12, the hull 1 is in the stern trim, so as shown by the streamline 7 of the bottom flow, it flows from the underside of the bottom of the ship around the bilge area to the side of the ship. There will be more flow coming up. Since such a flow flows across the bilge keel 5, there is a problem in that a vortex is generated due to separation of the flow, causing an increase in hull resistance.
本発明は、上述の問題点の解決をはかろうとするもので
、船舶の航行時における船底流との干渉を起こさないよ
うにビルジキールを分割式にして、船体抵抗の増加を防
止できるようにした、分割式ビルジキールを提供するこ
とを目的とする。The present invention is an attempt to solve the above-mentioned problems, and the bilge keel is made into a split type so as not to interfere with the underflow when the ship is sailing, thereby preventing an increase in hull resistance. , the purpose of which is to provide a split bilge keel.
Ｃ問題点を解決するための手段〕
このため、本発明の分割式ビルジキールは、船体のビル
ジ部に沿い断続的に突設された複数のビルジキール部材
をそなえ、これらのビルジキール部材の端部相互間に設
けられた隙間が、その部分における船底流の通過を許容
する向きを有するように形成されていることを特徴とし
ている。Means for Solving Problem C] For this reason, the split-type bilge keel of the present invention includes a plurality of bilge keel members intermittently protruding along the bilge portion of the hull, and the ends of these bilge keel members are connected to each other. It is characterized in that the gap provided in the gap is oriented so as to allow passage of bottom flow in the gap.
上述の本発明の分割式ビルジキールでは、船舶の航行時
に、船体のビルジ部における船底流が、ビルジキール部
材の端部相互間に設けられた隙間を通過できるようにな
る。In the above-described split bilge keel of the present invention, when the ship is sailing, bottom flow in the bilge portion of the ship body can pass through the gap provided between the ends of the bilge keel members.
したがって、従来のように船底流がビルジキールの干渉
を受けで流れの剥離を起こすというようなことがなくな
る。Therefore, unlike in the past, there is no possibility that the underflow is interfered with by the bilge keel and the flow separates.
以下、図面により本発明の実施例について説明すると、
第１，２図は本発明の第１実施例としての分割式ビルジ
キールを示すもので、＄１図はその平面図、第２図は第
１図のＩ［−ＩＩ矢視側面図であり、第３図は上記第１
実施例の変形例を示す側面図であり、第４〜７図は本発
明の第２実施例としての分割式ビルジキールを示すもの
で、第４図はその平面図、第５図はそのビルジキール部
材の駆＊ａ構の概略を示す説明図、第６図は上記ビルジ
キール部材の作動状態を示す平面図、第７図は第６図の
■−■矢視側面図である。Hereinafter, embodiments of the present invention will be explained with reference to the drawings.
1 and 2 show a split-type bilge keel as a first embodiment of the present invention, FIG. 1 is a plan view thereof, and FIG. Figure 3 is the same as above.
Fig. 4 is a side view showing a modification of the embodiment, and Figs. 4 to 7 show a split-type bilge keel as a second embodiment of the present invention, Fig. 4 is a plan view thereof, and Fig. 5 is a bilge keel member thereof. FIG. 6 is a plan view showing the operating state of the bilge keel member, and FIG. 7 is a side view taken along arrows 1--2 in FIG. 6.
まず、本発明の第１実施例について説明すると゛、第１
，２図に示すように、船体１のビルジ部に沿い断続的に
突設された前部ビルジキール部材５ｆ。First, the first embodiment of the present invention will be explained.
, 2, a front bilge keel member 5f intermittently protrudes along the bilge portion of the hull 1. As shown in FIG.
中央ビルジキール部材５ｃおよび後部ビルジキール部材
５ａからなる分割式ビルジキール５がそなえられでいる
。A split bilge keel 5 consisting of a central bilge keel member 5c and a rear bilge keel member 5a is provided.
そして、これらのビルジキール部材５ｆ、５ｃ、５ａの
端部相互間には、流ｉ７ｇで示す船底流を許容する向き
を持った隙間が形成されている。A gap is formed between the ends of these bilge keel members 5f, 5c, and 5a in a direction that allows a bottom flow indicated by a flow i7g.
すなわち、この船舶の満載状態での航行時１こおける船
底流が、船体前半部においでは船側からビルジ部を経て
船底下面へ向かうので、この流れの通過を許容できる向
きを有するように、前部ビルジキール部材５ｆと中央ビ
ルジキール部材５Ｃとの端部相互間の隙間が形成されて
いる。In other words, when the ship is sailing in a fully loaded state, the undercurrent flows from the ship's side to the bottom of the ship through the bilge in the front half of the ship. A gap is formed between the ends of the bilge keel member 5f and the central bilge keel member 5C.
また、船体後半部においては、船底流が船底下面からビ
ルジ部を経て船側へ向かうので、この流れを許容できる
向きを有するように、中央ビルジキール部材５ｃと後部
ビルジキール部材５ａとの端部相互間の隙間が形成され
ている。In addition, in the rear half of the hull, bottom flow flows from the lower surface of the bottom of the ship through the bilge section toward the ship side. A gap is formed.
上述の構成により、この船舶の満載状態での航行時には
、流線７ａで示す船底流が、ビルジキール５の干渉を受
けることなく、円滑に流れるようになり、したがって船
底流が流れの剥離を起こして渦を生じるというようなこ
とがなくなり、これにより従来のような船体抵抗の増加
が防止されるのである。With the above-mentioned configuration, when the ship is sailing in a fully loaded state, the bottom flow indicated by the streamline 7a flows smoothly without interference from the bilge keel 5, and therefore the bottom flow does not cause flow separation. This eliminates the generation of vortices, which prevents the conventional increase in hull resistance.
また、船体ビルジ部からほぼ直角に突設されたビルジキ
ール５は、従来の場合と同様に、船体の動揺に対しては
十分に抵抗し、これを低減させることができる。Further, the bilge keel 5, which projects from the hull bilge at a substantially right angle, can sufficiently resist and reduce the shaking of the hull, as in the conventional case.
なお、前部ビルジキール部材５ｆおよび後部ビルジキー
ル部材５ａについては、第３図に示すように、それぞれ
細分割して、それらの端部相互間の隙間を通じ船底流が
一層円滑に流れるようにすることができる。Note that the front bilge keel member 5f and the rear bilge keel member 5a may be subdivided, as shown in FIG. 3, to allow the bottom flow to flow more smoothly through the gaps between their ends. can.
また、前部ビルジキール部材５ｆおよび後部ビルジキー
ル部材５ａは必ずしも平板とは限らず、それぞれ前止が
り、後部がりに弯曲させてもよい。Further, the front bilge keel member 5f and the rear bilge keel member 5a are not necessarily flat plates, and may be curved at the front end or at the rear end, respectively.
次に、本発明の第２実施例を示す第４〜７図では、船体
１のビルジ部に沿い断続的に突設された多数の可動式ビ
ルジキール部材５′によりビルジキール５が構成されて
おり、各ビルジキール部材５′は、第５図に示すように
、船体外板８を水密に貫通するンヤ７ト９を介し、船内
の駆動装置１０によって回動調整されるようになってい
る。Next, in FIGS. 4 to 7 showing a second embodiment of the present invention, a bilge keel 5 is constituted by a large number of movable bilge keel members 5' that are intermittently protruded along the bilge portion of the hull 1, As shown in FIG. 5, each bilge keel member 5' is rotatably adjusted by a drive device 10 inside the ship via a shaft 9 that penetrates the hull outer plate 8 in a watertight manner.
そして、各ビルジキール部材５′の端部相互間における
隙間が、その部分における船底流（流線７ｂ）の通過を
許容する向きを有するごと＜ＷＲ整されるようになって
いる。The gaps between the end portions of each bilge keel member 5' are oriented so as to allow passage of the bottom flow (streamline 7b) in that portion.
上述の構成により、この船舶がパラスト状態で航行する
ような場合には、船体１が船尾トリムになるため、船底
流が、第７図において流線７ｂで示すように、船底下面
からビルジ部を経て船側へ上がってくるようになるが、
この船底流を円滑に通過させる向きを持った隙間が形成
されるように各ビルジキール部材５′が第６，７図に示
すごと（、−斉ｔこ回動調整される。With the above-mentioned configuration, when the ship is sailing in a parast state, the hull 1 is in the stern trim, so that the underflow flows from the underside of the ship to the bilge section, as shown by the streamline 7b in Fig. 7. Afterwards, it will start to rise towards the ship's side,
Each bilge keel member 5' is adjusted to rotate as shown in FIGS. 6 and 7 so that a gap is formed that is oriented to allow the bottom flow to pass through smoothly.
したがって、船底流が流れの剥離を起こして渦を生じる
というようなことがなくなり、これにより従来のような
船体抵抗の増加が防止されるのである。Therefore, separation of the bottom flow and generation of vortices does not occur, and this prevents the conventional increase in hull resistance.
また、この第２実施例では、船体の満載状態での航行時
には、前述の第１実施例における流＃ｉＩ７ ａで示す
ような船底流の流れの方向に応じ、この流れの通過を許
容する向きを持った隙間が形成されるように、各ビルジ
キール部材５′が適宜回動調整されて、船体抵抗の増加
が防止される。In addition, in this second embodiment, when sailing with the hull fully loaded, the direction that allows this flow to pass is determined according to the direction of the bottom flow as shown by flow #iI7a in the first embodiment. The rotation of each bilge keel member 5' is adjusted as appropriate so that a gap having a width of 100 mm is formed, thereby preventing an increase in hull resistance.
なお、この第２実施例の場合も、船体ビルジ部から突設
されたビルジキール５は、従来の場合と
１同様に、船体の動揺に対しては十分に抵抗し
、これを低減させることができる。In addition, also in the case of this second embodiment, the bilge keel 5 protruding from the hull bilge is different from the conventional case.
Similarly to No. 1, it is possible to sufficiently resist and reduce the shaking of the ship.
以上詳述したように、本発明の分割式ビルジキールによ
れば、船体のビルジ部に沿い断続的に突設された複数の
ビルジキール部材をそなえ、これらのビルジキール部材
の端部相互間に設けられた隙間が、その部分における船
底流の通過を許容する向きを有するように形成されると
いう簡素な構成で、船体の動揺を軽減させるビルジキー
ルとしての本末の機能を維持しながら、船舶の航行時に
おける船底流の剥離を防止し、渦の発生を抑制して、船
体抵抗の増加を防止しうる利点がある。As detailed above, according to the split-type bilge keel of the present invention, a plurality of bilge keel members are provided that protrude intermittently along the bilge portion of the hull, and a plurality of bilge keel members are provided between the ends of these bilge keel members. It has a simple configuration in which the gap is formed in a direction that allows the bottom flow to pass through that part, and while maintaining its main function as a bilge keel that reduces the shaking of the ship, This has the advantage of preventing flow separation, suppressing the generation of vortices, and preventing an increase in hull resistance.
第１，２図は本発明の第１実施例としての分割式ビルジ
キールを示すもので、第１図はその平面図、第２図は第
１図の■−■矢視側面図であり、第３図は上記第１実施
例の変形例を示す側面図であり、第４〜７図は本発明の
第２実施例としての分割式ビルジキールを示すもので、
第４図はその平面図、第５図はそのビルジキール部材の
駆動機構の概略を示す説明図、第６図は上記ビルジキー
ル部材の作動状態を示す平面図、第７図は第６図の■−
■矢視側面図であり、第８図は従来のビルジキールをそ
なえた船舶の満載状態を示す側面図、第９図は第８図の
ＩＸ−ＩＸ矢視断面図、第１０図は第８図のｘ−Ｘ矢視
断面図であり、第１１図は上記従来のビルジキールをそ
なえた船舶のバラスト状態を示す側面図、第１２図は第
１１図の刈−■矢視断面図である。
１・・船体、５・・ビルジキール、５′ ・・可動式ビ
ルジキール部材、５ａａ番後部ビルジキール部材、５ｃ
・・中央ビルジキール部材、５ｆ・・前部ビルジキール
部材、７ａ、７ｂ・・船底流の流線、８・・船体外板、
９・・シャフト、１０・・駆動装置。
復代理人 弁理士 飯 沼 義 彦
第４図
第６図
■
第７図1 and 2 show a split-type bilge keel as a first embodiment of the present invention. FIG. 1 is a plan view thereof, FIG. FIG. 3 is a side view showing a modification of the first embodiment, and FIGS. 4 to 7 show a split bilge keel as a second embodiment of the present invention.
FIG. 4 is a plan view thereof, FIG. 5 is an explanatory diagram schematically showing the drive mechanism of the bilge keel member, FIG. 6 is a plan view showing the operating state of the bilge keel member, and FIG. 7 is the
■It is a side view taken from the direction of arrows, and Fig. 8 is a side view showing a fully loaded state of a ship equipped with a conventional bilge keel. Fig. 9 is a sectional view taken from IX-IX of Fig. 8. Fig. 10 is a side view taken from Fig. 8. FIG. 11 is a side view showing the state of ballast of a ship equipped with the conventional bilge keel, and FIG. 12 is a cross-sectional view taken along the line-■ arrow in FIG. 11. 1... Hull, 5... Bilge keel, 5'... Movable bilge keel member, No. 5aa aft bilge keel member, 5c
... Central bilge keel member, 5f... Front bilge keel member, 7a, 7b... Streamline of bottom flow, 8... Hull outer plate,
9. Shaft, 10. Drive device. Sub-Agent Patent Attorney Yoshihiko Iinuma Figure 4 Figure 6 ■ Figure 7
Claims (1)
キール部材をそなえ、これらのビルジキール部材の端部
相互間に設けられた隙間が、その部分における船底流の
通過を許容する向きを有するように形成されていること
を特徴とする、分割式ビルジキール。A vessel is provided with a plurality of bilge keel members that protrude intermittently along the bilge part of the hull, and the gaps provided between the ends of these bilge keel members are oriented in such a way as to allow the passage of bottom flow in those parts. A split-type bilge keel characterized by being formed into.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17028384A JPS6146789A (en) | 1984-08-13 | 1984-08-13 | Split type bilge keel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17028384A JPS6146789A (en) | 1984-08-13 | 1984-08-13 | Split type bilge keel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6146789A true JPS6146789A (en) | 1986-03-07 |
Family
ID=15902072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17028384A Pending JPS6146789A (en) | 1984-08-13 | 1984-08-13 | Split type bilge keel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6146789A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999044882A1 (en) * | 1998-03-06 | 1999-09-10 | Petróleo Brasileiro S.A. - Petrobrás | Bilge keel and method for fpso type petroleum production systems |
| JP2007238007A (en) * | 2006-03-10 | 2007-09-20 | Yanmar Co Ltd | Bilge keel for ship |
| NL1036206C2 (en) * | 2008-11-17 | 2010-05-18 | Tryvia Boat Patent B V | FASTFISHING VESSEL. |
| US10526046B2 (en) * | 2013-06-26 | 2020-01-07 | Sealoading Holding As | Cargo transfer vessel |
-
1984
- 1984-08-13 JP JP17028384A patent/JPS6146789A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999044882A1 (en) * | 1998-03-06 | 1999-09-10 | Petróleo Brasileiro S.A. - Petrobrás | Bilge keel and method for fpso type petroleum production systems |
| GB2350088A (en) * | 1998-03-06 | 2000-11-22 | Petroleo Brasileiro Sa | Bilge keel and method for fpso type petroleum production systems |
| US6176191B1 (en) | 1998-03-06 | 2001-01-23 | Petroleo Brasileiro S.A. | Bilge keel and method for FPSO petroleum production systems |
| GB2350088B (en) * | 1998-03-06 | 2001-10-31 | Petroleo Brasileiro Sa | Bilge keel and method for fpso type petroleum production systems |
| 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 |
| NL1036206C2 (en) * | 2008-11-17 | 2010-05-18 | Tryvia Boat Patent B V | FASTFISHING VESSEL. |
| WO2010056120A1 (en) * | 2008-11-17 | 2010-05-20 | Tryvia Boat Patent B.V. | High-speed vessel |
| US10526046B2 (en) * | 2013-06-26 | 2020-01-07 | Sealoading Holding As | Cargo transfer vessel |
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