JPH10109684A - Micro-bubble generating device - Google Patents

Micro-bubble generating device

Info

Publication number
JPH10109684A
JPH10109684A JP8266360A JP26636096A JPH10109684A JP H10109684 A JPH10109684 A JP H10109684A JP 8266360 A JP8266360 A JP 8266360A JP 26636096 A JP26636096 A JP 26636096A JP H10109684 A JPH10109684 A JP H10109684A
Authority
JP
Japan
Prior art keywords
hull
pressurized air
plate
water
flexible porous
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.)
Withdrawn
Application number
JP8266360A
Other languages
Japanese (ja)
Inventor
Yoshiaki Takahashi
義明 高橋
Yuki Yoshida
有希 吉田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IHI Corp
Original Assignee
IHI Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by IHI Corp filed Critical IHI Corp
Priority to JP8266360A priority Critical patent/JPH10109684A/en
Publication of JPH10109684A publication Critical patent/JPH10109684A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T70/00Maritime or waterways transport
    • Y02T70/10Measures concerning design or construction of watercraft hulls

Landscapes

  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)

Abstract

PROBLEM TO BE SOLVED: To facilitate the formation of an exhaust nozzle and the mounting of a porous part and improve the corrosion resistance of the porous part by covering the outer surface of an opening part for blowing out pressurized air to a full outer plate with a thin plate-like flexible porous plate formed of a corrosion resisting material to water (sea water). SOLUTION: A flexible porous plate 10 is mounted by mounting a peripheral part 10a to a stepped part 9c by a connecting tool 11 such as rivet, and a number of pore-like blowout holes 10b having a diameter of 1-2mm are formed on the whole inner area of the peripheral part 10a. As the flexible porous plate 10, stainless steel, copper, rubber or plastic is used, and it is mounted in the state where it covers the opening part 5 of a hull outer plate 2 from the outside. When pressurized air is blown into water through the blowout holes 10b, bubbles and an air layer are interposed in the boundary layer with the water making contact with the submerged hull surface to reduce the frictional resistance. The flexible porous plate 10 is swollen outward by the pressurized air, and the form is equilibrated with hydraulic pressure. It is deformed by the kinetic energy of flowing water to smooth the flow line directional movement of water.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、マイクロバブル発
生装置に係り、特に、没水状態の船体表面の境界層に気
泡及び気体層を介在させて、摩擦抵抗を減少させる技術
に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microbubble generator, and more particularly to a technique for reducing frictional resistance by interposing a bubble and a gas layer in a boundary layer on a submerged hull surface.

【0002】[0002]

【従来の技術】船舶等の摩擦低減を図るために、船体の
表面に気泡または空気層を介在させる方法が提案されて
いる。気泡を水中に噴出させる技術として、(1)特開
昭50−83992号、(2)特開昭53−13628
9号、(3)特開昭60−139586号、(4)特開
昭61−71290号、(5)実開昭61−39691
号、(6)実開昭61−128185号が提案されてい
る。また、船底部のくぼみに空気層を形成する技術とし
て、(7)実開昭61−128184号が提案されてい
る。
2. Description of the Related Art In order to reduce friction of a ship or the like, a method of interposing a bubble or an air layer on the surface of a hull has been proposed. Techniques for ejecting air bubbles into water include (1) Japanese Patent Application Laid-Open No. 50-83992, and (2) Japanese Patent Application Laid-Open No. 53-13628.
No. 9, (3) JP-A-60-139586, (4) JP-A-61-71290, (5) JP-A-61-39691.
(6) Japanese Utility Model Application Laid-Open No. 61-128185 has been proposed. Further, as a technique for forming an air layer in a hollow at the bottom of a ship, (7) Japanese Utility Model Application Laid-Open No. 61-128184 has been proposed.

【0003】そして、これらの技術では、気泡を噴出さ
せる方法として、空気ポンプで発生させた加圧空気を複
数の穴や多孔板から水中に噴出させるようにしている。
In these techniques, as a method of ejecting air bubbles, pressurized air generated by an air pump is ejected into water from a plurality of holes or a perforated plate.

【0004】[0004]

【発明が解決しようとする課題】しかし、船体外板に直
接細孔を明ける技術であると、穿孔作業時の労力が多大
になるとともに、細孔部分の耐食性を確保することが困
難になる。また、多孔板を船体外板に取り付ける技術で
あっても同様の困難性がともなうものとなる。
However, if the technique is to directly drill holes in the outer shell of the hull, the labor required for drilling work will be great, and it will be difficult to ensure the corrosion resistance of the holes. Further, even with the technique of attaching the perforated plate to the hull outer plate, the same difficulty is involved.

【0005】本発明は、これらの事情に鑑みてなされた
もので、以下の目的を有するものである。 噴出孔の形成を容易にすること。 多孔部の取り付けを容易にすること。 多孔部の耐食性を向上させること。 多孔部に使用される材料の選択範囲を広く設けるこ
と。 船体外表面の境界層に気泡及び気体層を効率よく形
成すること。 噴出孔への空気送り込み抵抗を小さくすること。 船体外板に取付られる多孔部の突出部を小さくし
て、水(海水)と船体側面との接触摩擦抵抗を小さくす
ること。 多孔部が配された範囲における船体外板の強度の健
全性を保持すること。
The present invention has been made in view of these circumstances, and has the following objects. To facilitate the formation of orifices. Easy installation of the porous part. To improve the corrosion resistance of the porous part. Provide a wide selection range of materials used for the porous portion. To efficiently form bubbles and gas layers in the boundary layer on the outer surface of the hull. To reduce the resistance to sending air into the orifice. To reduce the contact frictional resistance between water (seawater) and the side of the hull by reducing the projection of the porous part attached to the hull outer panel. Maintaining the soundness of strength of the hull skin in the area where the perforated part is arranged.

【0006】[0006]

【課題を解決するための手段】船体外板から気体を噴出
し、没水表面に接する境界層に気泡および気体層を介在
させて没水表面の摩擦抵抗を減少させ、船体外板に加圧
空気を噴出する開口部が配されるとともに、該開口部の
外側表面に、気体を噴出させる薄板状のフレキシブル多
孔板が覆った状態に配される技術が採用される。船体外
板の開口部の外側表面に取り付けフレームが取り付けら
れ、該取り付けフレームにフレキシブル多孔板が取り付
けられる。このとき、取り付けフレームが溶接等によっ
て船体外板の外側表面に取り付けられるとともに、取り
付け箇所に外側表面との間を滑らかに接続する緩傾斜部
が形成される。フレキシブル多孔板は、ステンレス鋼,
銅,ゴム,プラスチック等の水(海水)に対して耐食性
を有する耐食材によって形成され、多数の細孔からなる
噴出孔が配される。船体外板の内側表面には、開口部を
内側から覆うエアチャンバが配され、該エアチャンバの
空気プレナム部に加圧空気供給手段から加圧空気が供給
される。なお、開口部にあっては、円形,楕円形,長方
形,ひし形等が適用され、長径,短径を有する場合は、
長手方向を船体の前後方向に合わせて形成され、短径に
おいて、数10mm以上、長径において、数10m位ま
で許容される。このため、長径が数10mm程度の開口
部がそれぞれ独立した状態で複数配される場合、一つの
フレキシブル多孔板によって開口部全域を覆った状態と
なるように取り付ける技術が採用される。また、長径が
数10mとなる場合には、開口全域を覆う一つのエアチ
ャンバに対して、複数のフレキシブル多孔板を取り付け
る技術も採用される。
A gas is blown out of a hull outer plate, and bubbles and a gas layer are interposed in a boundary layer in contact with the submerged surface to reduce the frictional resistance of the submerged surface and pressurize the hull outer plate. A technique is employed in which an opening for ejecting air is provided, and a thin flexible porous plate for ejecting gas is covered on the outer surface of the opening. A mounting frame is mounted on the outer surface of the opening of the hull skin, and a flexible perforated plate is mounted on the mounting frame. At this time, the attachment frame is attached to the outer surface of the hull outer plate by welding or the like, and a gentle slope portion is formed at the attachment location to smoothly connect the outer surface to the outer surface. Flexible perforated plate is made of stainless steel,
An ejection hole made of a corrosion-resistant material having corrosion resistance to water (seawater) such as copper, rubber, plastic, or the like, and having a large number of pores is provided. An air chamber that covers the opening from the inside is arranged on the inner surface of the hull outer panel, and pressurized air is supplied to the air plenum portion of the air chamber from pressurized air supply means. For the opening, a circle, ellipse, rectangle, rhombus, etc. are applied.
It is formed so that the longitudinal direction is aligned with the longitudinal direction of the hull, and is allowed up to several tens of mm or more in the short diameter and up to several tens of meters in the long diameter. For this reason, when a plurality of openings each having a major diameter of about several tens of mm are arranged independently of each other, a technique is employed in which a single flexible porous plate is attached so as to cover the entire opening. When the major axis is several tens of meters, a technique of attaching a plurality of flexible porous plates to one air chamber covering the entire opening is also employed.

【0007】[0007]

【発明の実施の形態】以下、本発明に係るマイクロバブ
ル発生装置を、タンカーやコンテナ船等の船舶に適用し
た一実施形態について、図1ないし図3を参照して説明
する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which a microbubble generating device according to the present invention is applied to a ship such as a tanker or a container ship will be described below with reference to FIGS.

【0008】各図において、符号1は摩擦低減船、2は
船体外板、2aは内側表面、2bは外側表面、3は船首
部、4は没水表面(船体表面)、5は開口部、6はエア
チャンバ、7は空気プレナム部、8は加圧空気供給手
段、9は取り付けフレーム、10はフレキシブル多孔板
である。
In each of the drawings, reference numeral 1 denotes a friction reducing ship, 2 denotes a hull shell, 2a denotes an inner surface, 2b denotes an outer surface, 3 denotes a bow, 4 denotes a submerged surface (hull surface), 5 denotes an opening, 6 is an air chamber, 7 is an air plenum portion, 8 is pressurized air supply means, 9 is a mounting frame, and 10 is a flexible porous plate.

【0009】前記摩擦低減船1は、図1に示すように、
船体外板2の少なくとも船首部3における船体外板2の
没水表面(船体表面)4に開口部5が複数あけられ、該
開口部5およびその付近に、加圧空気を水中に噴出させ
るための多孔部Tが取り付けられる。
[0010] As shown in FIG.
A plurality of openings 5 are formed in the submerged surface (hull surface) 4 of the hull outer panel 2 at least at the bow 3 of the hull outer panel 2, and pressurized air is blown into the water at and around the opening 5. Is attached.

【0010】前記多孔部Tは、図2に示すように、加圧
空気を挿通させるために船体外板2にあけられた開口部
5と、該開口部5を内側から覆うように船体外板2に取
り付けられるエアチャンバ6と、該エアチャンバ6の内
部に形成される空気プレナム部7と、該空気プレナム部
7に加圧空気を送り込むための加圧空気供給手段8と、
船体外板2の開口部5のまわりの外側表面2bに取り付
けられる取り付けフレーム9と、該取り付けフレーム9
に開口部5の外側を覆った状態に取り付けられるフレキ
シブル多孔板10とを具備する。
As shown in FIG. 2, the porous portion T has an opening 5 formed in the hull outer plate 2 for allowing pressurized air to pass therethrough, and a hull outer plate so as to cover the opening 5 from the inside. 2, an air plenum 7 formed inside the air chamber 6, a pressurized air supply means 8 for feeding pressurized air into the air plenum 7,
A mounting frame 9 mounted on the outer surface 2b around the opening 5 of the hull skin 2;
And a flexible porous plate 10 attached so as to cover the outside of the opening 5.

【0011】前記エアチャンバ6にあっては、図2に示
すように、船体外板2の内側表面2aに溶接により取り
付けられ、その構成壁6aが開口部5を内側から覆って
該開口部5の形成範囲およびその近傍の船体外板2を補
強するように設定される。
In the air chamber 6, as shown in FIG. 2, it is attached to the inner surface 2a of the hull outer plate 2 by welding, and its constituent wall 6a covers the opening 5 from the inside so as to cover the opening 5. Is set so as to reinforce the hull shell 2 in the formation range and the vicinity thereof.

【0012】前記空気プレナム部7は、エアチャンバ6
によって多孔部Tの裏側に形成される空間であり、図2
に示すように、加圧空気供給手段8から供給される加圧
空気が構成壁6aに配された供給口6bから取り入れら
れる構造が適用される。
The air plenum section 7 includes an air chamber 6
2 is a space formed on the back side of the porous portion T.
As shown in FIG. 7, a structure is employed in which the pressurized air supplied from the pressurized air supply means 8 is taken in from the supply port 6b provided in the component wall 6a.

【0013】前記加圧空気供給手段8にあっては、船体
1の甲板等に配される空気取り入れ口から取り入れられ
た空気を、コンプレッサー,ポンプまたはブロア等によ
って加圧して没水表面4の複数の開口部5に加圧空気を
供給する。また、加圧空気の供給量は、移送管8aの途
中に配した制御弁8bにより遠隔操作によって制御され
る。
In the pressurized air supply means 8, air taken in from an air intake port provided on a deck or the like of the hull 1 is pressurized by a compressor, a pump, a blower or the like to form a plurality of submerged surfaces 4. And pressurized air is supplied to the opening 5. Further, the supply amount of the pressurized air is controlled by remote control by a control valve 8b disposed in the middle of the transfer pipe 8a.

【0014】前記取り付けフレーム9は、図2に示すよ
うに、平坦部9aの外周縁部が溶接等によって船体外板
2に固定され、該平坦部9aの内方に船体外板2に対し
て角度θを有して緩傾斜部9bが傾斜状態に配され、該
緩傾斜部9bの内周縁部近傍にフレキシブル多孔板10
を取り付けるための段部9cが形成される。
As shown in FIG. 2, the outer periphery of the flat portion 9a of the mounting frame 9 is fixed to the hull outer plate 2 by welding or the like. The gentle inclined portion 9b is arranged in an inclined state with an angle θ, and the flexible porous plate 10 is disposed near the inner peripheral edge of the gentle inclined portion 9b.
Is formed.

【0015】前記フレキシブル多孔板10は、図2に示
すように、周縁部10a,段部9cに対してリベット等
の連結具11によって取り付けられ、周縁部10aの内
方全域に多数の直径1〜2mmの細孔状の噴出孔10b
が形成される。また、フレキシブル多孔板10は、ステ
ンレス鋼,銅,ゴム,プラスチック等の可撓性を有する
薄板が採用されるとともに、船体外板2の開口部5を外
側から覆った状態で取り付けられる。
As shown in FIG. 2, the flexible porous plate 10 is attached to the peripheral portion 10a and the step 9c by a connecting tool 11 such as a rivet, and has a large number of diameters 1 to 1 throughout the peripheral portion 10a. 2mm pore-shaped ejection hole 10b
Is formed. As the flexible porous plate 10, a flexible thin plate such as stainless steel, copper, rubber, plastic, or the like is employed, and the flexible porous plate 10 is attached while covering the opening 5 of the hull outer plate 2 from the outside.

【0016】このような、構成を有するマイクロバブル
発生装置であると、摩擦低減船1の航行時等において加
圧空気供給手段8を作動させて、加圧空気を空気プレナ
ム部7に送り込むと、その内容積に対応して圧力の平衡
がなされた状態で、一つまたは複数の開口部5からフレ
キシブル多孔板10の内側空間部に加圧空気が送り込ま
れ、次いで、加圧空気が多数の噴出孔10bから水中に
噴出させられ、フレキシブル多孔板10の外側およびそ
の近傍の外側表面2bに気泡層を形成して、摩擦抵抗に
寄与する。つまり、没水表面(船体表面)4に接する水
(海水)との境界層に気泡および気体層を介在させて摩
擦抵抗を減少させることになる。
In the microbubble generator having such a configuration, when the pressurized air supply means 8 is operated at the time of navigating the friction reducing ship 1 and the like, and pressurized air is sent to the air plenum portion 7, In a state where the pressure is balanced in accordance with the internal volume, pressurized air is sent from one or a plurality of openings 5 into the inner space of the flexible porous plate 10, and then a large number of pressurized air is ejected. The bubbles are spouted into the water from the holes 10b to form a bubble layer on the outer surface 2b outside and near the flexible porous plate 10, thereby contributing to frictional resistance. That is, frictional resistance is reduced by interposing bubbles and a gas layer in a boundary layer between water (seawater) and the submerged surface (hull surface) 4.

【0017】この際の、フレキシブル多孔板10は、加
圧空気の圧力によって外側に膨らみ、その形状は、水圧
と平衡することによって保持される。また、流水の運動
エネルギーによってフレキシブル多孔板10が変形をと
もなうが、その変形が許容されることにより水の流線方
向の移動を円滑化する。
At this time, the flexible porous plate 10 expands outward due to the pressure of the pressurized air, and its shape is maintained by equilibrium with the water pressure. Moreover, although the flexible porous plate 10 is deformed by the kinetic energy of the flowing water, the deformation is allowed, so that the movement of the water in the streamline direction is smoothed.

【0018】そして、加圧空気供給手段8の非作動時に
あっては、フレキシブル多孔板10の噴出孔10bを介
して水が挿通するために、フレキシブル多孔板10が任
意形状を維持することになる。
When the pressurized air supply means 8 is not operated, water is inserted through the ejection holes 10b of the flexible porous plate 10, so that the flexible porous plate 10 maintains an arbitrary shape. .

【0019】〔他の実施の形態〕本発明に、係わるマイ
クロバブル発生装置にあっては、次の技術を採用するこ
とができる。 (a) 船体外板2に形成される開口部5の形状は、そ
の形状として、円形、楕円形、長方形、ひし形等が適用
され、長径,短径を有する場合にあっては、長手方向を
船体の前後方向に合わせて形成すること。 (b) 開口部5の大きさにあっては、短径において、
数10mm以上とされ、長径において数10m位まで許
容されること。 (c) 開口部5の長径が数10m位まで許容される場
合にあっては、該長径に対応するエアチャンバ6を配
し、これに複数のフレキシブル多孔板10を取り付ける
技術が採用されること。 (d) 連結具11にあっては、ネジ止め,カシメ,溶
接,接着等の固定技術が採用され、かつ、必要に応じて
フレキシブル多孔板10が新規のものと交換されるこ
と。
[Other Embodiments] The microbubble generator according to the present invention can employ the following techniques. (A) The shape of the opening 5 formed in the hull outer panel 2 is a circle, an ellipse, a rectangle, a rhombus, or the like. To be formed in the longitudinal direction of the hull. (B) Regarding the size of the opening 5, in the short diameter,
It should be several tens of mm or more, and it can be up to several tens of meters in the major axis. (C) In the case where the major axis of the opening 5 is allowed up to about several tens of meters, a technique of arranging an air chamber 6 corresponding to the major axis and attaching a plurality of flexible porous plates 10 to this is adopted. . (D) The connecting tool 11 employs a fixing technique such as screwing, caulking, welding, or bonding, and the flexible porous plate 10 is replaced with a new one as required.

【0020】[0020]

【発明の効果】本発明に係るマイクロバブル発生装置に
あっては、以下の効果を奏する。 (1) 薄板によってフレキシブル多孔板が形成される
ため多孔部を簡単に作製することができる。 (2) フレキシブル多孔板の周縁部を取り付けフレー
ムに対して締結具によって取り付けることにより、船体
外板へのフレキシブル多孔板の取り付け作業を容易に行
うことができる。 (3) フレキシブル多孔板の材料選択性を高め、多孔
部の耐食性を向上させることができる。 (4) 噴出孔における加圧空気の挿通距離を小さくし
て、気泡の生成抵抗を少なくすることができる。 (5) フレキシブル多孔板の材料の選択範囲が広が
り、より経済的な材料を使用することが可能となり、生
産コストの低減を図ることができる。 (6) フレキシブル多孔板に形成される噴出孔の高密
度加工が容易化することにより、微小な気泡を大量に生
成することができる。 (7) フレキシブル多孔板が可撓性を有する薄板から
形成されることにより、船体外板に配される突出部の水
圧に応じた形状変形が可能となり、船体表面における水
との摩擦抵抗の低減を図ることができる。 (8) 空気プレナム部が設けられることにより、加圧
空気が噴出孔の形成範囲全体から均等に噴出され、没水
表面の境界層における気泡および気体層を効率よく形成
することができる。 (9) 開口部が設けられた範囲の船体外板の内側表面
に、エアチャンバを配し、補強部材となる構成壁によっ
て該開口部のまわりを補強することにより、船体外板の
強度の健全性を保持することができる。 (10) 上記により船舶等への実用化を容易にするこ
とができる。
The microbubble generator according to the present invention has the following effects. (1) Since a flexible perforated plate is formed by a thin plate, a perforated portion can be easily produced. (2) By attaching the peripheral portion of the flexible porous plate to the mounting frame with a fastener, the work of attaching the flexible porous plate to the hull outer plate can be easily performed. (3) The material selectivity of the flexible porous plate can be improved, and the corrosion resistance of the porous portion can be improved. (4) It is possible to reduce the insertion distance of the pressurized air in the ejection hole, and to reduce the generation resistance of bubbles. (5) The selection range of the material for the flexible perforated plate is expanded, and more economical materials can be used, and the production cost can be reduced. (6) By facilitating the high-density processing of the ejection holes formed in the flexible porous plate, a large amount of minute bubbles can be generated. (7) Since the flexible perforated plate is formed from a flexible thin plate, it becomes possible to deform the shape of the protruding portion disposed on the hull outer plate according to the water pressure, thereby reducing the frictional resistance of the hull surface with water. Can be achieved. (8) By providing the air plenum portion, pressurized air is evenly jetted from the entire area where the jet holes are formed, so that bubbles and gas layers in the boundary layer on the submerged surface can be efficiently formed. (9) An air chamber is arranged on the inner surface of the hull skin in the area where the opening is provided, and the surroundings of the opening are reinforced by a component wall serving as a reinforcing member, thereby improving the strength of the hull skin. Sex can be maintained. (10) Practical application to ships and the like can be facilitated by the above.

【簡単な図面の説明】[Description of simple drawings]

【図1】 本発明に係るマイクロバブル発生装置が適用
される摩擦低減船の正面図である。
FIG. 1 is a front view of a friction reduction ship to which a microbubble generator according to the present invention is applied.

【図2】 本発明に係わるマイクロバブル発生装置の一
実施例を示すブロック図を併記した一部の記載を省略し
た正断面図である。
FIG. 2 is a front sectional view of a microbubble generator according to an embodiment of the present invention, in which a block diagram illustrating an embodiment of the microbubble generator is partially omitted, and some description is omitted.

【図3】 図2のフレキシブル多孔板噴の噴出孔の状況
を示す要部の正断面図である。
FIG. 3 is a front sectional view of a main part showing the state of the ejection holes of the flexible porous plate ejection of FIG. 2;

【符号の説明】[Explanation of symbols]

1 摩擦低減船 2 船体外板 2a 内側表面 2b 外側表面 3 船首部 4 没水表面(船体表面) 5 開口部 6 エアチャンバ 6a 構成壁 6b 供給口 7 空気プレナム部 8 加圧空気供給手段 8a 移送管 8b 制御弁 9 取り付けフレーム 9a 平坦部 9b 緩傾斜部 9c 段部 10 フレキシブル多孔板 10a 周縁部 10b 噴出孔 11 連結具 REFERENCE SIGNS LIST 1 friction reduction ship 2 hull outer plate 2a inner surface 2b outer surface 3 bow 4 submerged surface (hull surface) 5 opening 6 air chamber 6a component wall 6b supply port 7 air plenum 8 pressurized air supply means 8a transfer pipe 8b Control valve 9 Mounting frame 9a Flat portion 9b Slowly inclined portion 9c Stepped portion 10 Flexible perforated plate 10a Peripheral edge portion 10b Spray hole 11 Connector

Claims (7)

【特許請求の範囲】[Claims] 【請求項1】 船体外板(2)から気体を噴出し、没水
表面(4)に接する境界層に気泡および気体層を介在さ
せて、没水表面の摩擦抵抗を減少させる装置であって、
船体外板に加圧空気を噴出する開口部(5)が配される
とともに、該開口部の外側表面(2b)にフレキシブル
多孔板(10)が覆った状態に配されることを特徴とす
るマイクロバブル発生装置。
An apparatus for blowing gas from a hull shell (2) and interposing bubbles and a gas layer in a boundary layer in contact with a submerged surface (4) to reduce frictional resistance of the submerged surface. ,
An opening (5) for ejecting pressurized air is disposed on the hull outer panel, and a flexible perforated plate (10) is disposed so as to cover an outer surface (2b) of the opening. Micro bubble generator.
【請求項2】 船体外板(2)の船体外板の開口部
(5)の外側表面(2b)に取り付けフレーム(9)が
取り付けられ、該取り付けフレームにフレキシブル多孔
板(10)が取り付けられることを特徴とする請求項1
記載のマイクロバブル発生装置。
2. A mounting frame (9) is mounted on the outer surface (2b) of the hull skin opening (5) of the hull skin (2), and a flexible porous plate (10) is mounted on the mounting frame. 2. The method according to claim 1, wherein
The microbubble generator according to the above.
【請求項3】 取り付けフレーム(9)が溶接等によっ
て船体外板(2)の外側表面(2b)に取り付けられる
とともに、取り付け箇所に外側表面との間を滑らかに接
続する緩傾斜部(9b)が形成されることを特徴とする
請求項1および2記載のマイクロバブル発生装置。
3. A gently sloped portion (9b) for attaching a mounting frame (9) to an outer surface (2b) of a hull shell (2) by welding or the like, and connecting the mounting portion to the outer surface smoothly. The microbubble generator according to claim 1, wherein the microbubble is formed.
【請求項4】 フレキシブル多孔板(10)は、水(海
水)に対して耐食性を有する耐食材によって形成され、
多数の細孔からなる噴出孔(10b)が配されることを
特徴とする請求項1、2および3記載のマイクロバブル
発生装置。
4. The flexible porous plate (10) is formed of a corrosion-resistant material having corrosion resistance to water (seawater),
4. The micro-bubble generator according to claim 1, wherein an ejection hole (10b) comprising a large number of pores is arranged.
【請求項5】 船体外板(2)の内側表面(2a)に
は、開口部(5)を内側から覆うエアチャンバ(6)が
配され、該エアチャンバの空気プレナム部(7)に加圧
空気供給手段(8)から加圧空気が供給されることを特
徴とする請求項1、2、3および4記載のマイクロバブ
ル発生装置。
5. An air chamber (6) for covering the opening (5) from the inside is disposed on the inner surface (2a) of the hull shell (2), and is added to an air plenum (7) of the air chamber. 5. The micro-bubble generator according to claim 1, wherein pressurized air is supplied from a pressurized air supply means.
【請求項6】 開口部(5)が複数配され、複数の開口
部と一つのフレキシブル多孔板(10)とが組み合わさ
れることを特徴とする請求項1、2、3、4および5記
載のマイクロバブル発生装置。
6. The method according to claim 1, wherein a plurality of openings (5) are arranged, and the plurality of openings and one flexible perforated plate (10) are combined. Micro bubble generator.
【請求項7】 一つのエアチャンバ(6)に対して、複
数のフレキシブル多孔板(10)が取り付けられること
を特徴とする請求項1、2、3、4、5および6記載の
マイクロバブル発生装置。
7. Microbubble generation according to claim 1, wherein a plurality of flexible porous plates (10) are attached to one air chamber (6). apparatus.
JP8266360A 1996-10-07 1996-10-07 Micro-bubble generating device Withdrawn JPH10109684A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8266360A JPH10109684A (en) 1996-10-07 1996-10-07 Micro-bubble generating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8266360A JPH10109684A (en) 1996-10-07 1996-10-07 Micro-bubble generating device

Publications (1)

Publication Number Publication Date
JPH10109684A true JPH10109684A (en) 1998-04-28

Family

ID=17429870

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8266360A Withdrawn JPH10109684A (en) 1996-10-07 1996-10-07 Micro-bubble generating device

Country Status (1)

Country Link
JP (1) JPH10109684A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999057380A1 (en) * 1998-05-06 1999-11-11 Gerhard Fleischhacker Flexible liquid blocking device
KR100650592B1 (en) * 2000-04-11 2006-11-28 삼성중공업 주식회사 Apparatus for falling resistance of ship
US7966959B1 (en) * 2008-04-15 2011-06-28 The United States Of America As Represented By The Secretary Of The Navy Permeable hull to mitigate impact load in water
JP2014526421A (en) * 2011-10-07 2014-10-06 サムソン ヘビー インダストリーズ カンパニー,リミテッド Vibration-reducing ship
WO2015152601A1 (en) * 2014-04-02 2015-10-08 현대중공업 주식회사 Air injection apparatus protruding toward seawater from bottom plate of vessel
KR20150115637A (en) * 2014-04-02 2015-10-14 현대중공업 주식회사 Air injecting apparatus protruding from bottom plate of ship toward seawater
RU2643745C2 (en) * 2016-07-06 2018-02-05 Владимир Дмитриевич Шкилев Submarine
KR20190013953A (en) * 2017-01-31 2019-02-11 미츠비시 쥬고교 가부시키가이샤 Friction reducing device of ship
CN113788102A (en) * 2021-10-19 2021-12-14 中船重工(上海)节能技术发展有限公司 Voltage stabilization cavity structure, gas layer resistance reduction system and ship

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999057380A1 (en) * 1998-05-06 1999-11-11 Gerhard Fleischhacker Flexible liquid blocking device
KR100650592B1 (en) * 2000-04-11 2006-11-28 삼성중공업 주식회사 Apparatus for falling resistance of ship
US7966959B1 (en) * 2008-04-15 2011-06-28 The United States Of America As Represented By The Secretary Of The Navy Permeable hull to mitigate impact load in water
JP2014526421A (en) * 2011-10-07 2014-10-06 サムソン ヘビー インダストリーズ カンパニー,リミテッド Vibration-reducing ship
WO2015152601A1 (en) * 2014-04-02 2015-10-08 현대중공업 주식회사 Air injection apparatus protruding toward seawater from bottom plate of vessel
KR20150115637A (en) * 2014-04-02 2015-10-14 현대중공업 주식회사 Air injecting apparatus protruding from bottom plate of ship toward seawater
CN106163912A (en) * 2014-04-02 2016-11-23 现代重工业株式会社 Base plate at boats and ships protrudes from the air jet system of sea water
RU2643745C2 (en) * 2016-07-06 2018-02-05 Владимир Дмитриевич Шкилев Submarine
KR20190013953A (en) * 2017-01-31 2019-02-11 미츠비시 쥬고교 가부시키가이샤 Friction reducing device of ship
CN113788102A (en) * 2021-10-19 2021-12-14 中船重工(上海)节能技术发展有限公司 Voltage stabilization cavity structure, gas layer resistance reduction system and ship

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