JP2010052614A - Bilge keel - Google Patents

Bilge keel Download PDF

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JP2010052614A
JP2010052614A JP2008220827A JP2008220827A JP2010052614A JP 2010052614 A JP2010052614 A JP 2010052614A JP 2008220827 A JP2008220827 A JP 2008220827A JP 2008220827 A JP2008220827 A JP 2008220827A JP 2010052614 A JP2010052614 A JP 2010052614A
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bilge keel
bilge
ship
keel
angle
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JP4820393B2 (en
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Satoshi Nakatani
聡 中谷
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Shin Kurushima Dockyard Co Ltd
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Shin Kurushima Dockyard Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a bilge keel having simple structure and good propeller propulsion efficiency. <P>SOLUTION: This bilge keel 1 having a continuous length of 20 to 30%Lpp to front and rear sides from a vessel length direction center part of a vessel 100 is arranged in a lower part on both vessel sides of the vessel 100. A mounting angle of a rear tail part of the bilge keel 1 on a hull is inclined to face upward from an about 20% part of a stern side of the bilge keel 1 to a rear side from the viewpoint of a vessel side direction. A water flow on the rear side of the bilge keel 1 is made to flow into an upper end part of the propeller 102. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、船舶の両船側下部に配設されるビルジキールの構造に関する。   The present invention relates to a structure of a bilge keel disposed at the lower part on both sides of a ship.

一般に、船舶には横揺れを抑制するために、ビルジキールと称する部材が船底船側に設けられる。この種のビルジキールは、船底船側に船体縦方向に連続して設けられる連続型ともいうべきビルジキールの外、船体縦方向に複数に区分されたいわば分割型ビルジキールがある。図８は、従来の連続型ビルジキールの概略を示す船体側面図であり、図８において、符号１００は、船舶、１０１は、連続型ビルジキール、１０２はプロペラである。   Generally, a ship is provided with a member called a bilge keel on the bottom ship side in order to suppress rolling. This type of bilge keel includes a so-called split type bilge keel that is divided into a plurality of parts in the vertical direction of the hull, in addition to a continuous type that is also referred to as a continuous type that is continuously provided in the vertical direction of the hull. FIG. 8 is a hull side view schematically showing a conventional continuous bilge keel. In FIG. 8, reference numeral 100 denotes a ship, 101 denotes a continuous bilge keel, and 102 denotes a propeller.

上記の連続型ビルジキールとしては、例えば、特表２００４−５１３８３０号公報に開示のものが知られており、上記の分割型ビルジキールとしては、例えば、実開昭６１−１３８７９２号（実願Ｓ６０−０２２６８９『格納式ビルジキール装置』）に開示のものが知られている。
特表２００４−５１３８３０号公報に開示のビルジキールは、発明名称「高効率ビルジキール」に係り、「単純な形状を備え、その長さが制限されているため、船舶でのロール運動を減少させるのにそれほど大きな役割を果たすことができない等・・に鑑み（同公報明細書段落番号０００３参照）、速度が遅い船舶や海洋構造物及びＦＰＳＯ等に様々な形状を備えるビルジキールを設けて船舶のロール運動を大きく減少することができる高効率のビルジキールを提供すること（同公報明細書段落番号０００４参照）」を目的として、「幅と底面の延長線外に突出するよう設けられ（請求項１参照）あるいは、ビルジキールの端部には三角形または円形の断面形状の構造物が連結され設けられた（請求項２、３参照）」構成により、「ロール運動を最大限抑制して、運動性能の向上を図り、船舶設計及び解釈に役立たせることができる等」の効果を奏するようにしたものである（同公報明細書段落番号００１７参照）。 As the above-mentioned continuous type bilge keel, for example, the one disclosed in JP-T-2004-513830 is known, and as the above-mentioned split type bilge keel, for example, Japanese Utility Model Laid-Open No. 61-138792 (actual application S60-022689). One disclosed in “Retractable Bilge Keel Device”) is known.
The bilge keel disclosed in JP-T-2004-513830 is related to the invention name "High-efficiency bilge keel", and "Since it has a simple shape and its length is limited, it reduces the roll motion on ships. In view of the fact that it cannot play such a large role (see paragraph number 0003 of the same gazette specification), the ship's roll motion is provided by providing bilge keels with various shapes on ships, marine structures and FPSOs that are slow in speed. For the purpose of providing a highly efficient bilge keel that can be greatly reduced (see paragraph number 0004 of the publication), it is provided so as to protrude outside the extension line of the width and bottom surface (see claim 1) or A structure having a triangular or circular cross-sectional shape is connected to the end of the bilge keel (refer to claims 2 and 3). The was maximally suppressed, achieving an improvement in exercise performance is obtained by such an effect, such as "may be to help the ship design and interpretation (see the publication specification paragraph number 0017).

また、前記実開昭６１−１３８７９２号（実願Ｓ６０−０２２６８９）に開示のビルジキールは、考案名称「格納式ビルジキール装置」に係り、「海象が比較的穏やかな海上を航行する場合においては、・・・抵抗増加によって推進性能を低下させるという問題点・・・を解決しようとするもので、・・・船体横揺れの軽減および推進性能低下の防止の双方をはかれるようにした格納式ビルジキール装置を提供すること」を目的として（同公報２頁３行ないし１４行参照）、「船体の船底部と両船側部とをそれぞれ連結する船体湾曲部に船長方向に沿い複数個に分割されて突設されるビルジキールをそなえ、同ビルジキールを収納すべく上記船体湾曲部に凹所が形成されて、同凹所の一側に上記ビルジキールの基端部が枢着されるとともに、同ビルジキールの回転駆動機構が設けられた」の構成をとることにより（同公報実用新案登録請求の範囲参照）、「簡素な構成で、船体横揺れの軽減および推進性能低下の防止を共にはかれる利点が得られる」の効果を奏するようにしたものである（７頁１２行ないし８頁２行参照）。   Also, the bilge keel disclosed in the Japanese Utility Model Application No. 61-138792 (actual application S60-022689) is related to the devised name "retractable bilge keel device".・ ・ Problems to reduce propulsion performance due to increased resistance ... A retractable bilge keel device that can reduce both hull roll and prevention of propulsion performance. For the purpose of "providing" (see page 3, lines 3 to 14 of the same publication), "the hull curved part that connects the bottom of the hull and both sides of the hull is divided into a plurality along the length of the ship. And a concave portion is formed in the curved portion of the hull to store the bilge keel, and a base end portion of the bilge keel is pivotally attached to one side of the concave portion, By adopting the configuration of “A bilge keel rotation drive mechanism is provided” (see the claims of the utility model registration in the publication), “the simple configuration has the advantage of reducing hull roll and preventing propulsion performance from being reduced. The effect of "obtained" is achieved (see page 7, line 12 to page 8, line 2).

すなわち、実開昭６１−１３８７９２号（実願Ｓ６０−０２２６８９『格納式ビルジキール装置』）に開示のビルジキールは、図９に示されるように、「船体の船底部と両船側部とをそれぞれ連結する船体湾曲部に船長方向に沿い複数個に分割されて突設され」、さらに、「同ビルジキールを収納すべく上記船体湾曲部に凹所が形成されて、同凹所の一側に上記ビルジキールの基端部が枢着されるとともに、同ビルジキールの回転駆動機構が設け」たものである。なお、図９は、上記実開昭６１−１３８７９２号公報の図２に開示の従来の格納式ビルジキール装置の概略を示す図であり、該ビルジキール１１０にはモータ（図示外）、傘歯車やシャフト１０３などのビルジキール回転駆動機構（図示外）を備えるものである。
特表２００４−５１３８３０号公報 実開昭６１−１３８７９２号公報 That is, the bilge keel disclosed in Japanese Utility Model Publication No. 61-138792 (actual application S60-022689 “Retractable Bilge Keel Device”), as shown in FIG. 9, “connects the bottom of the hull and the sides of both ships, respectively. `` It is divided into a plurality of parts along the length of the ship along the length of the ship's curved part '', and further, `` a recess is formed in the above-mentioned curved part to store the bilge keel, and the bilge keel The base end portion is pivotally attached, and the rotational drive mechanism of the bilge keel is provided. FIG. 9 is a diagram showing an outline of the conventional retractable bilge keel device disclosed in FIG. 2 of Japanese Utility Model Laid-Open No. 61-138792. The bilge keel 110 includes a motor (not shown), a bevel gear and a shaft. A bilge keel rotation drive mechanism (not shown) such as 103 is provided.
Special table 2004-513830 gazette Japanese Utility Model Publication No. 61-138792

しかしながら、上記特表２００４−５１３８３０号公報に開示の船側に一体に設けられる連続型ビルジキールは、連続型ビルジキール特有の問題点として、船尾端部から後方にビルジ渦が発生するため、プロペラ推進効率が悪くなるという問題がある。また、実開昭６１−１３８７９２号公報に開示のもののように、分割型ビルジキールは、適宜格納できる反面、構造が複雑であり、駆動部があるため、故障する畏れがあるという問題がある。
本願各請求項に係る発明は、上記の問題点に鑑み、構造が簡単で、かつ、プロペラ推進効率の良いビルジキールを提供することを目的とする。 However, the continuous bilge keel that is integrally provided on the ship side disclosed in the above Japanese translation of PCT International Publication No. 2004-513830 has a problem that is unique to the continuous bilge keel. There is a problem of getting worse. Further, as disclosed in Japanese Utility Model Laid-Open No. 61-138792, the split-type bilge keel can be stored as appropriate, but has a problem that it has a complicated structure and has a drive unit, which may cause a failure.
In view of the above problems, an object of the present invention is to provide a bilge keel having a simple structure and good propeller propulsion efficiency.

上記の目的に鑑み、本願請求項１に係る発明は、ビルジキールにおいて、船舶の船長方向に連続してまたは各ブロック毎に分割して配置されるビルジキールであって、中央部から前後に全長の２０〜３０％Ｌｐｐの長さのビルジキールを前記船舶の両ビルジ外板中央部に配置し、かつ、当該ビルジキールの後尾部の船体への取付け角度を船側方向からみてビルジキールの船尾の約２０％部分から後方を上向きになるように傾斜させたことを特徴とする。
また、本願請求項２に係る発明は、前記請求項１に記載のビルジキールにおいて、前記ビルジキールの後尾部の船体への取付け角度は、船長方向の中央部においては、船舶の船側から船底にかけての湾曲部に対して直角とし、かつ、船尾から約２０％部分から後方においては、前記湾曲部に対して上方に傾斜して船底側の取り付け角度が鈍角となることを特徴とする。
また、本願請求項３に係る発明は、前記請求項１に記載のビルジキールにおいて、前記分割されたビルジキールのうち、船側方向からみて最船尾のビルジキールの船体への取付け角度をビルジキールの後方の水流がプロペラ上端部へ流れ込む角度としたことを特徴とする。 In view of the above-mentioned object, the invention according to claim 1 of the present application is a bilge keel arranged in a bilge keel continuously in the captain direction of a ship or divided for each block, and has a total length of 20 from front to back. A bilge keel with a length of ˜30% Lpp is arranged at the center part of both bilge skins of the ship, and the angle of attachment of the tail part of the bilge keel to the hull is viewed from about 20% of the stern of the bilge keel. It is characterized in that it is tilted so that the rear is upward.
The invention according to claim 2 of the present application is the bilge keel according to claim 1, wherein the angle of attachment of the rear part of the bilge keel to the hull is a curve from the ship side to the bottom of the ship at the center in the ship length direction. It is characterized in that the mounting angle on the bottom side of the ship becomes an obtuse angle with a right angle with respect to the section and with an inclination of about 20% from the stern to the rear with respect to the curved section.
The invention according to claim 3 of the present application is the bilge keel according to claim 1, wherein, among the divided bilge keels, the angle of attachment of the stern bilge keel to the hull as viewed from the ship side is determined by the flow of water behind the bilge keel. It is characterized by the angle flowing into the upper end of the propeller.

本発明は、上述のとおり構成されているので、次の効果を奏する。
ビルジキール最船尾部の角度を調整して、ビルジキール後方の水流がプロペラ上端部へ流れるよう配置することにより、構造が簡単で、かつ、プロペラ推進効率が良くなり馬力軽減の効果がある。 Since this invention is comprised as mentioned above, there exists the following effect.
By adjusting the angle of the stern of the bilge keel so that the water flow behind the bilge keel flows to the upper end of the propeller, the structure is simple, the propeller propulsion efficiency is improved, and the horsepower is reduced.

本願発明を実施するための最良の形態に係るビルジキールの一実施例を図面に基づいて詳細に説明する。   An embodiment of a bilge keel according to the best mode for carrying out the present invention will be described in detail with reference to the drawings.

図１は、本願発明を実施するための最良の形態である実施例１に係るビルジキールの側面図であり、同図２は、同実施例１に係るビルジキールを船尾から見た概略を示す図であり、そのうち、図２（Ａ）は、船尾から見た船舶中央部におけるビルジキールの取り付け角度の概略を、図２（Ｂ）は、同船尾から見た船尾側の取り付け角度の概略を示す図である。図１および図２において、符号１００は、図８に示したと同じ船舶であり、符号１は、前記船舶１００の船側に設けられるビルジキールである。   FIG. 1 is a side view of a bilge keel according to a first embodiment which is the best mode for carrying out the present invention, and FIG. 2 is a schematic view of the bilge keel according to the first embodiment as viewed from the stern. 2A is an outline of the bilge keel attachment angle at the center of the ship as seen from the stern, and FIG. 2B is an outline of the stern side attachment angle as seen from the stern. is there. 1 and 2, reference numeral 100 is the same ship as shown in FIG. 8, and reference numeral 1 is a bilge keel provided on the ship side of the ship 100.

すなわち、図１および図２に示すように、これら本実施例１に係るビルジキール１は、船舶１００の船長方向中央部（図中Ｍ点として表記）から前後に計２０〜３０％Ｌｐｐの長さの連続型ビルジキール１を前記船舶１００の両船側下部に配置したものである。そして、本実施例１に係るビルジキール１は、ビルジキールの後尾部の船体への取付け角度を調整することにより、後部に発生するビルジ渦の向きを変えて、プロペラ推進効率を高めたものである。具体的には、前記ビルジキール１の後方の水流が前記プロペラ１０２の上端部へ流れ込むように船側方向からみてビルジキール１の船尾の約２０％部分から後方を上向きになるように傾斜させたものである。   That is, as shown in FIGS. 1 and 2, the bilge keel 1 according to the first embodiment has a total length of 20 to 30% Lpp from the center of the ship 100 in the ship length direction (shown as point M in the figure). The continuous bilge keel 1 is arranged at the lower part on both ship sides of the ship 100. And the bilge keel 1 which concerns on the present Example 1 changes the direction of the bilge vortex which generate | occur | produces in a rear part by adjusting the attachment angle to the hull of the rear part of a bilge keel, and improves propeller propulsion efficiency. Specifically, the water flow behind the bilge keel 1 is inclined so that the rear side is upward from about 20% of the stern of the bilge keel 1 when viewed from the ship side so that the water flow behind the bilge keel 1 flows into the upper end of the propeller 102. .

図２に示すように、船尾から見たビルジキール１の船体への取付け角度に関しては、船長方向の中央部においては、船舶１００の船側外板１０４から船底外板１０６にかけてのビルジ外板１０５に対して直角とし、かつ、船尾から約２０％部分から後方においては、前記湾曲部に対して約１１０度、すなわち、下方に傾斜して鈍角となるように取付けるようにしたものである。   As shown in FIG. 2, with respect to the mounting angle of the bilge keel 1 to the hull as viewed from the stern, the bilge keel 105 from the ship side skin 104 to the bottom skin 106 of the ship 100 is located at the center in the ship's direction. In the rearward direction from the stern at about 20% from the stern, it is attached to the curved portion so as to have an obtuse angle with an inclination of about 110 degrees, that is, downward.

また、本実施例１においては、前記船尾から約２０％部分から後方においては、前記湾曲部に対するビルジキール１の取り付け角度を１１０度にして、水槽実験を繰り返したところ、次ようなデータを得た。図３は、水槽内に船長２メートルの船舶模型に相当する長さのビルジキールを取り付け、前記船尾から２０％部分から後方における取り付け角度を１１０度に変更して実験を試み、得られた馬力軽減効果を示すデータである。縦軸に馬力（ｋＷ），横軸に速力（ｋｎｏｔｓ）を示す。また、図３中、実線で示すものが角度を変更しないで、そのままストレートに湾曲部に釣り付けられているビルジキールの実験データであり、点線で示すものが、本実施例１に係る船尾約２０％部分から後方において前記湾曲部に対して約１００度の角度で取り付けられたビルジキール１の馬力軽減効果を示すものである。図３から明らかなように、本実施例1に係るビルジキール１では、常用出力において、１．０〜２．０％の軽減効果が認められた。   Further, in Example 1, from the rear of about 20% from the stern, the water tank experiment was repeated with the mounting angle of the bilge keel 1 with respect to the curved portion being 110 degrees, and the following data was obtained. . Fig. 3 shows that the bilge keel with a length equivalent to a ship model with a length of 2 meters was installed in the aquarium, and the experiment was attempted by changing the mounting angle at the rear from 20% to 110 degrees from the stern. This data shows the effect. The vertical axis represents horsepower (kW) and the horizontal axis represents speed (knots). Further, in FIG. 3, the solid line indicates experimental data of a bilge keel that is directly caught by the curved portion without changing the angle, and the dotted line indicates the stern of about 20 stern according to the first embodiment. It shows the horsepower reduction effect of the bilge keel 1 attached at an angle of about 100 degrees with respect to the curved portion behind the% portion. As is clear from FIG. 3, in the bilge keel 1 according to Example 1, a reduction effect of 1.0 to 2.0% was observed in the normal output.

次に、本願発明を実施するための最良の形態である本実施例２に係る分割型ビルジキールについて、図面に基づいて詳細に説明する。
図４は、本願発明を実施するための最良の形態である実施例２に係る分割型ビルジキールの側面図であり、同図５は、分割された個々のビルジキールの概略を示す概略拡大図であり、図６は、同実施例２に係る分割型ビルジキールを船尾から見た概略を示す図であり、そのうち、図６（Ａ）は、船尾から見た船舶中央部におけるビルジキールの取り付け角度の概略を、図６（Ｂ）は、同船尾から見た船尾側ビルジキールの取り付け角度の概略を示す図である。図４ないし図６において、符号１１ないし１５は、前記船舶１００の船側に分割して設けられるビルジキールであり、船首から順に１１、１２、１３・・・の順に、本実施例２に係る分割型ビルジキールでは、船首側の最先のビルジキール１１から最後尾のビルジキール１５まで、合計５個に分割されたビルジキール１１、１２、１３、１４、１５が設けられる。 Next, the split type bilge keel according to the second embodiment which is the best mode for carrying out the present invention will be described in detail with reference to the drawings.
FIG. 4 is a side view of a split type bilge keel according to a second embodiment which is the best mode for carrying out the present invention, and FIG. 5 is a schematic enlarged view showing an outline of each divided bilge keel. FIG. 6 is a diagram showing an outline of the split bilge keel according to the second embodiment as seen from the stern, and FIG. 6 (A) shows an outline of the mounting angle of the bilge keel at the center of the ship as seen from the stern. FIG. 6B is a diagram showing an outline of the stern side bilge keel mounting angle as seen from the stern. 4 to 6, reference numerals 11 to 15 are bilge keels provided separately on the ship side of the ship 100, and are divided types according to the second embodiment in order of 11, 12, 13... From the bow. In the bilge keel, there are provided bilge keels 11, 12, 13, 14, 15 which are divided into a total of five from the first bilge keel 11 on the bow side to the last bilge keel 15.

すなわち、図４ないし図６に示すように、これら分割されたビルジキール１１、１２、１３、１４、１５は、船舶１００の船長方向中央部（図中Ｍ点として表記）から前後に全長２０〜３０％Ｌｐｐの長さ、５分割された各ビルジキール１１、１２、１３、１４、１５が、ブロック毎に分割されて取り付けられている。   That is, as shown in FIGS. 4 to 6, these divided bilge keels 11, 12, 13, 14, and 15 have a total length of 20 to 30 from the center in the length direction of the ship 100 (shown as point M in the figure). Each bilge keel 11, 12, 13, 14, 15 divided by a length of% Lpp is divided and attached to each block.

また、前記分割型ビルジキール１１、１２、１３、１４、１５のうち、前記最後尾の分割ビルジキール１５を後方の水流がプロペラ上端部へ流れるように船側方向からみて最船尾の分割ビルジキール１５の船尾端部が上向きになるように傾斜させる。
さらに、分割型ビルジキール１１、１２、１３、１４、１５のうち、それぞれの分割型ビルジキールの船体への取付け角度は、船尾方向から見て、船長方向の中央部（符合「Ｍ」で示す）に位置するビルジキール１３に対しては、その取り付け角度を前記船舶１００の船側から船底にかけての湾曲部に対して直角とし、最後尾に位置する分割型ビルジキール１５では前記湾曲部に対して約１００度ぐらいの鈍角となるように取付ける。 Of the split-type bilge keels 11, 12, 13, 14, 15, the stern end of the stern split bilge keel 15 as viewed from the ship side so that the rear stream of water flows to the upper end of the propeller. Tilt so that the part is facing upward.
Further, among the split-type bilge keels 11, 12, 13, 14, 15, the angle at which each of the split-type bilge keels is attached to the hull is at the center in the ship length direction (indicated by the symbol “M”) when viewed from the stern direction. The mounting angle of the bilge keel 13 is set to be perpendicular to the curved part from the ship side to the bottom of the ship 100, and the split bilge keel 15 located at the tail is about 100 degrees with respect to the curved part. Install so that the obtuse angle is.

なお、図５に示すように、各分割型ビルジキール１１、１２、１３、１４、１５のそれぞれは、略台形形状で船長方向の長さはブロック分割にもよるが約６ｍ〜約１５ｍ、高さは約０．４ｍ〜約０．６ｍ、船体側の角度は約１５度のものとした。ここで、ブロック毎に分割するとしたのは、ブロックごとに船体を構築する作業工程においては、前記各ビルジキール１１、１２、１３、１４、１５も各ブロックごとに構築する方が作業性が良く、各ブロックごとに、その船側から船底にかけての湾曲部に各ビルジキールを取り付けるようにする。したがって、各ビルジキール間の間隔も、水流を乱さない程度の間隔で良いが、各ブロック構築の際の作業性を考慮して適宜の間隔を決めればよいものである。   As shown in FIG. 5, each of the divided bilge keels 11, 12, 13, 14, and 15 has a substantially trapezoidal shape, and the length in the length direction is about 6 m to about 15 m, depending on the block division, and the height. Is about 0.4 m to about 0.6 m, and the angle on the hull side is about 15 degrees. Here, in the work process of constructing the hull for each block, it is better to construct each bilge keel 11, 12, 13, 14, 15 for each block. For each block, each bilge keel is attached to a curved portion from the ship side to the ship bottom. Therefore, the interval between the bilge keels may be an interval that does not disturb the water flow, but an appropriate interval may be determined in consideration of workability in building each block.

すなわち、本実施例２に係る分割型ビルジキール１１、１２、１３、１４、１５において、分割されたビルジキールの最後尾のビルジキールやそれに続くビルジキールの取り付け角度を上向きに調整することにより、ビルジ渦の向きを変えて、プロペラ推進効率を高めたものである。   That is, in the split-type bilge keels 11, 12, 13, 14, and 15 according to the second embodiment, the direction of the bilge vortex is adjusted by adjusting the mounting angle of the last bilge keel of the divided bilge keel and the subsequent bilge keel upward. To improve propeller propulsion efficiency.

次に、本実施例２に係る分割型ビルジキールに関して、上述したと同様に、船尾から約２０％部分以降のビルジキールの前記湾曲部に対する取り付け角度を様々に変更した場合の馬力軽減効果の水槽実験を繰り返した。水槽実験は、水槽内に船長２メートルの船舶模型に相当するビルジキールを取り付け、最後尾のビルジキール１５の取り付け角度を７０度、９０度、１１０度の三種類について、速力に対する馬力の相関データを得てみた。   Next, with respect to the split type bilge keel according to the second embodiment, as described above, a water tank experiment of the horsepower reduction effect when variously changing the attachment angle of the bilge keel about 20% from the stern to the curved portion is performed. Repeated. In the tank experiment, a bilge keel equivalent to a ship model with a length of 2 meters was installed in the tank, and correlation data of horsepower with respect to speed was obtained for three types of attachment angles of the last bilge keel 15 of 70 degrees, 90 degrees, and 110 degrees. I tried.

図７は、水槽内に船長２メートルの船舶模型に５つの各ビルジキール１１、１２、１３、１４、１５を取り付け、最後尾のビルジキール１５の取り付け角度について、上記の三種類の取り付け角度に変更して実験を試みてえられた馬力軽減効果のデータである。縦軸に馬力（ｋＷ），横軸に速力（ｋｎｏｔｓ）を示す。また、図７中、実線で示すものが角度を変更しないとき（船側方向からみたビルジキールの船尾の約２０％部分後方を傾斜させないとき）の分割型ビルジキールのデータであり、細点線で示すものが取り付け角度１１０度の場合、波線で示すものが取り付け角度９０度の場合、一点鎖線で示すものが７０度の取り付け角度の場合をそれぞれ示している。   FIG. 7 shows that the five bilge keels 11, 12, 13, 14, and 15 are attached to a ship model with a length of 2 meters in the aquarium, and the attachment angle of the last bilge keel 15 is changed to the above three types of attachment angles. It is data of the horsepower reduction effect obtained by experimenting. The vertical axis represents horsepower (kW) and the horizontal axis represents speed (knots). In addition, in FIG. 7, the solid line indicates the data of the split bilge keel when the angle is not changed (when the rear part of the stern of the bilge keel is not tilted about 20% as viewed from the ship side direction), and the data indicated by the thin dotted line In the case of the attachment angle of 110 degrees, the case indicated by the wavy line indicates the case of the attachment angle of 90 degrees, and the case indicated by the alternate long and short dash line indicates the case of the attachment angle of 70 degrees.

いずれも、角度をもって取り付けたものの方が馬力低減の効果があることが知りうるが、これらの実験のうちでも、最後尾のビルジキール１５の取り付け角度を１１０度にしたときが、最も馬力軽減効果が働くことが知りうる。すなわち、角度の変更がないものに比し、７０度の取り付け角度のものでは、０．７〜１．７％の馬力軽減の改善が見られ、同９０度の取り付け角度の場合は、角度の変更がないものに比し、１．０〜２．０％の馬力軽減の改善が見られ、さらには、１１０度の取り付け角度のものでは、角度の変更がないものに比し、１．２〜２．２％の馬力軽減の改善があることが知りうる。   In either case, it can be seen that the one attached with an angle has the effect of reducing the horsepower, but among these experiments, when the attachment angle of the last bilge keel 15 is set to 110 degrees, the horsepower reduction effect is most effective. I know I can work. In other words, compared with the case where the angle is not changed, the improvement in horsepower reduction of 0.7 to 1.7% is seen in the case of the attachment angle of 70 degrees, and in the case of the attachment angle of 90 degrees, the angle An improvement in horsepower reduction of 1.0 to 2.0% is seen compared to the case where there is no change. Furthermore, in the case of a mounting angle of 110 degrees, it is 1.2 compared to the case where the angle is not changed. It can be seen that there is an improvement in horsepower reduction of ~ 2.2%.

なお、本実施例２においては、前記最後尾の分割ビルジキール１５を後方の水流がプロペラ上端部へ流れるように船側方向からみて最後尾の分割ビルジキールの船尾端部が上向きになるように傾斜させたが、これは最後尾の分割ビルジキー
、ルの傾斜に限るものではなく、上述の実施例１の例に倣って、全体として
、のビルジキール１１、１２、１３、１４、１５のうち、差後尾から起算して
約２０％部分に位置するビルジキールからの後方のビルジキールに関して、その取り付け角度が上向きになるように傾斜させるものであっても良い。 In the second embodiment, the rearmost split bilge keel 15 is tilted so that the stern end of the rearmost split bilge keel is upward when viewed from the ship side so that the rear water flow flows to the upper end of the propeller. However, this is not limited to the last split bilge key, the slope of the le, but according to the example of the first embodiment described above, of the bilge keels 11, 12, 13, 14, 15 as a whole, from the difference tail Regarding the bilge keel behind the bilge keel located at the approximately 20% portion, it may be inclined so that the mounting angle is upward.

本願発明は、船舶ビルジキールに利用する。   The present invention is used for a ship bilge keel.

図１は、本願発明を実施するための最良の形態である実施例１に係るビルジキール（連続）の側面図、FIG. 1 is a side view of a bilge keel (continuous) according to Example 1 which is the best mode for carrying out the present invention; 図２（Ａ）は、船舶中央部におけるビルジキールの取り付け角度の概略を、図２（Ｂ）は、同船尾側の取り付け角度の概略を示す図、FIG. 2 (A) shows an outline of the mounting angle of the bilge keel in the center of the ship, and FIG. 2 (B) shows an outline of the mounting angle on the stern side, 図３は、水槽内に船長２メートルの船舶模型に相当するビルジキールを取り付け、前記船尾から２０％部分における取り付け角度を種々変更して実験を試みてえられた馬力軽減効果を示す図、FIG. 3 is a view showing a horsepower reduction effect obtained by attaching a bilge keel corresponding to a ship model with a length of 2 meters in the aquarium, and changing the attachment angle at a 20% portion from the stern in various ways, and performing experiments. 図４は、本願発明を実施するための最良の形態である実施例２に係る分割型ビルジキールの側面図、FIG. 4 is a side view of a split bilge keel according to a second embodiment which is the best mode for carrying out the present invention; 図５は、分割された個々のビルジキールの概略を示す概略拡大図、FIG. 5 is a schematic enlarged view showing an outline of each divided bilge keel; 図６（Ａ）は、船舶中央部におけるビルジキールの取り付け角度の概略を、図６（Ｂ）は、同船尾側ビルジキールの取り付け角度の概略を示す図、FIG. 6 (A) shows an outline of the mounting angle of the bilge keel in the center of the ship, and FIG. 6 (B) shows an outline of the mounting angle of the stern side bilge keel. 図７は、水槽内に船長２メートルの船舶模型に５つの各ビルジキール１１、１２、１３、１４、１５を取り付け、最後尾のビルジキール１５の取り付け角度について、上記の三種類の取り付け角度に変更して実験を試みてえられた馬力軽減効果を示す図、FIG. 7 shows that the five bilge keels 11, 12, 13, 14, and 15 are attached to a ship model with a length of 2 meters in the aquarium, and the attachment angle of the last bilge keel 15 is changed to the above three types of attachment angles. The figure showing the horsepower reduction effect obtained by experimenting with 図８は、従来の一般的ビルジキールの概略を示す船体側面図、FIG. 8 is a side view of a hull showing an outline of a conventional general bilge keel. 図９は、実開昭６１−１３８７９２号公報に開示の従来の格納式ビルジキール装置の概略を示す図である。FIG. 9 is a diagram showing an outline of a conventional retractable bilge keel device disclosed in Japanese Utility Model Laid-Open No. 61-138792.

符号の説明Explanation of symbols

１ 連続型ビルジキール
１１、１２、１３、１４、１５ 分割型ビルジキール
１００ 船舶
１０２ プロペラ
１０３ シャフト
１０４ 船側外板
１０５ ビルジ外板
１０６ 船底外板 DESCRIPTION OF SYMBOLS 1 Continuous type bilge keel 11, 12, 13, 14, 15 Split type bilge keel 100 Vessel 102 Propeller 103 Shaft 104 Ship side skin 105 Bilge skin 106 Ship bottom skin

Claims (3)

船舶の船長方向に連続してまたは各ブロック毎に分割して配置されるビルジキールであって、中央部から前後に全長の２０〜３０％Ｌｐｐの長さのビルジキールを前記船舶の両ビルジ外板中央部に配置し、かつ、当該ビルジキールの後尾部の船体への取付け角度を船側方向からみてビルジキールの船尾の約２０％部分から後方を上向きになるように傾斜させたことを特徴とするビルジキール。   A bilge keel arranged continuously in the direction of the ship's length or divided into each block, the bilge keel having a length of 20 to 30% of the total length from the center to the front and back of the bilge keel at the center of both bilge outer plates of the ship The bilge keel is arranged so that the angle of the bilge keel attached to the hull of the rear part of the bilge keel is inclined upward from about 20% of the stern of the bilge keel as viewed from the ship side. 前記ビルジキールの後尾部の船体への取付け角度は、船長方向の中央部においては、船舶の船側から船底にかけての湾曲部に対して直角とし、かつ、船尾から約２０％部分から後方においては、前記湾曲部に対して上方に傾斜して船底側の取り付け角度が鈍角となることを特徴とする請求項１に記載のビルジキール。   The angle of attachment of the bilge keel to the hull at the rear part of the bilge keel is perpendicular to the curved part from the ship side to the bottom of the ship in the center in the direction of the ship, and from the rear about 20% from the stern. 2. The bilge keel according to claim 1, wherein the bilge keel is inclined upward with respect to the curved portion and has an obtuse angle on the bottom side. 前記分割されたビルジキールのうち、船側方向からみて最船尾のビルジキールの船体への取付け角度をビルジキールの後方の水流がプロペラ上端部へ流れ込む角度としたことを特徴とする請求項１に記載のビルジキール。   2. The bilge keel according to claim 1, wherein, among the divided bilge keels, an angle at which the stern bilge keel is attached to the hull as viewed from the ship side direction is an angle at which a water flow behind the bilge keel flows into the upper end of the propeller.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200480500Y1 (en) 2014-08-19 2016-06-02 대우조선해양 주식회사 Floating type production structure
WO2018150912A1 (en) * 2017-02-17 2018-08-23 三井Ｅ＆Ｓ造船株式会社 Hull structure
CN114954776A (en) * 2022-04-28 2022-08-30 大连船舶重工集团有限公司 Novel bilge keel suitable for FPSO

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JPS5551763U (en) * 1978-10-02 1980-04-05
JPS62137289A (en) * 1985-12-10 1987-06-20 Mitsubishi Heavy Ind Ltd Bilge keel with rear extension part
JPH0297189U (en) * 1989-01-19 1990-08-02
JPH0632291U (en) * 1992-09-29 1994-04-26 石川島播磨重工業株式会社 Ice piece floating promotion device for ice sea vessels
JP2007238008A (en) * 2006-03-10 2007-09-20 Yanmar Co Ltd Anti-corrosion plate for ship
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200480500Y1 (en) 2014-08-19 2016-06-02 대우조선해양 주식회사 Floating type production structure
WO2018150912A1 (en) * 2017-02-17 2018-08-23 三井Ｅ＆Ｓ造船株式会社 Hull structure
CN114954776A (en) * 2022-04-28 2022-08-30 大连船舶重工集团有限公司 Novel bilge keel suitable for FPSO
CN114954776B (en) * 2022-04-28 2023-11-17 大连船舶重工集团有限公司 Bilge keels suitable for FPSO

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