JPH107070A - Air supply system for submerged hull - Google Patents
Air supply system for submerged hullInfo
- Publication number
- JPH107070A JPH107070A JP8158291A JP15829196A JPH107070A JP H107070 A JPH107070 A JP H107070A JP 8158291 A JP8158291 A JP 8158291A JP 15829196 A JP15829196 A JP 15829196A JP H107070 A JPH107070 A JP H107070A
- Authority
- JP
- Japan
- Prior art keywords
- air
- water
- opening
- film
- submerged
- 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- Withdrawn
Links
Classifications
-
- 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
- Y02T70/00—Maritime or waterways transport
- Y02T70/10—Measures concerning design or construction of watercraft hulls
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
(57)【要約】
【課 題】 航走体の流体摩擦抵抗を減少させる装置を
提供する。
【解決手段】 没水面３ａに撥水性材料よりなる空気捕
捉性の膜体４を形成し、該膜体４の表面に空気を供給し
て、該膜体表面と水との間に空気層ｂを形成して航走す
る航走体１において、該航走体１の前部であって、かつ
前記没水面３ａの膜体４の表面に大気に連通する開口部
８を設け、前記航走体１が航走するとき前記大気の圧力
と前記開口部８に接する水の圧力との差により前記膜体
４の表面に空気を供給するようにした航走体没水面への
空気供給装置。
(57) [Abstract] [Problem] To provide an apparatus for reducing fluid frictional resistance of a hull. SOLUTION: An air trapping film 4 made of a water-repellent material is formed on a submerged surface 3a, and air is supplied to the surface of the film 4 so that an air layer b is formed between the film surface and the water. In the sailing body 1 which sails while forming, the opening 8 communicating with the atmosphere is provided at the front of the sailing body 1 and on the surface of the film body 4 of the submerged surface 3a. An air supply device for supplying water to the surface of the marine vehicle, wherein the air is supplied to the surface of the film body 4 by a difference between the pressure of the atmosphere and the pressure of the water in contact with the opening 8 when the body 1 travels.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は航走体没水面への空
気供給装置、より詳しくは、ボート、ウインドサーフィ
ンの如き水上航走体であって、かつその没水面に撥水性
材料よりなる空気捕捉性を持つ膜体を形成した航走体没
水面への空気供給装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for supplying air to a submerged surface of a vehicle, and more particularly, to an airborne vehicle such as a boat or windsurfing, wherein the submerged surface is made of a water-repellent material. The present invention relates to a device for supplying air to a watercraft submerged surface having a trapping film.
【０００２】[0002]
【従来の技術】従来、海洋レジャーとして用いられる水
上航走体としてボート、ウインドサーフィン、水中スク
ーター、水上スキーなどが知られている。ところで、こ
れら航走体は水上を航走するとき流体摩擦抵抗が生じ、
そのため駆動力に対し得られる速度は小さいものとなっ
ている。2. Description of the Related Art Conventionally, boats, windsurfers, underwater scooters, water skis, and the like have been known as watercraft used as marine leisure. By the way, these sailboats generate fluid frictional resistance when sailing on water,
Therefore, the speed obtained with respect to the driving force is small.
【０００３】そこで本出願人は、かゝる航走体の没水面
に撥水性材料よりなる膜体を形成してこの膜体表面と水
との間に空気層を形成し、この空気層を保持するため微
量の空気を供給するような小型水上航走体を提案してい
る。即ち、前記航走体の没水面に形成される膜体として
は、例えばポリテトラフルオロエチレンの粉末、疎水性
シリカの粉末、ポリエチレン、ポリプロピレンの粉末、
あるいは親水性樹脂の表面処理により撥水性を付与した
材料の粉末の一種まはた二種以上からなる撥水性材料を
予め塗料に混合した後、没水面に塗布するか又は没水面
に塗料を塗布した後、この微粉末状の撥水性材料を吹き
付け等により塗料表面に付着させることにより、少なく
ともその表面に微細な凹凸が形成され、かつ特にその凸
部は撥水性材料より構成されるものである。[0003] The applicant of the present invention has formed a film made of a water-repellent material on the submerged surface of such a vehicle, and formed an air layer between the surface of the film and water. We propose a small watercraft that supplies a small amount of air to hold it. That is, as the film formed on the submerged surface of the sailing body, for example, polytetrafluoroethylene powder, hydrophobic silica powder, polyethylene, polypropylene powder,
Alternatively, a water-repellent material composed of one or more powders of water-repellent material obtained by surface treatment of a hydrophilic resin is mixed in advance with a paint, and then applied to a submerged surface or applied to a submerged surface. After that, the fine powdery water-repellent material is adhered to the paint surface by spraying or the like, so that at least fine irregularities are formed on the surface, and particularly, the convex portions are made of the water-repellent material. .
【０００４】そしてこのような膜体表面には没水時に予
めその微細な凹部内に空気が保持され、この空気は容易
には剥離することなく、しかもその表面に供給された空
気と合体し、空気層を形成する作用を有する。したがっ
て微量の空気を供給するのみで流体摩擦抵抗を大幅に減
少させることができるのである。On the surface of such a film body, air is previously held in the minute concave portions when immersed in water, and this air does not easily peel off, and is united with the air supplied to the surface, It has the function of forming an air layer. Therefore, fluid frictional resistance can be greatly reduced only by supplying a small amount of air.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら前記した
ような小型水上航走体においては没水面への空気を供給
するための動力が必要になり、そのため特別の動力装置
が必要になる。このことは特に小型の水上航走体におい
ては構造の複雑化を来しかつコスト高になるという問題
がある。However, such a small watercraft as described above requires power for supplying air to the submerged surface, and therefore requires a special power unit. This has a problem that the structure is complicated and the cost is high, especially in a small watercraft.
【０００６】[0006]
【課題を解決するための手段】本発明は前記従来技術の
問題点を解決するためになされたものであって、没水面
に撥水性材料よりなる空気捕捉性の膜体を形成し、該膜
体表面に空気を供給して、該膜体表面と水との間に空気
層を形成して航走するような航走体において、該航走体
の前部であって、かつ前記航走体が航走するとき前記大
気の圧力と前記開口部に接する水の圧力との差により前
記膜体表面に空気を供給するように構成した空気供給装
置を提供せんとするものである。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and comprises forming an air-trapping film made of a water-repellent material on a submerged surface. A sailing body that supplies air to the body surface to form an air layer between the surface of the membrane body and water and sails, wherein the sailing body is a front part of the sailing body, and It is an object of the present invention to provide an air supply device configured to supply air to the surface of the membrane by a difference between the pressure of the atmosphere and the pressure of water in contact with the opening when the body sails.
【０００７】そして好ましくは開口部近傍の没水面上で
あって、かつ航走体の進行方向前部に突起物が設けら
れ、更に開口部には、該開口部に接する水の圧力が大気
圧と等しいか又は少なるとき開放する弁体が設けられ、
この弁体は開口部に設けられた圧力センサーの信号によ
り操作されるよう構成されのが好ましい。かゝる構成に
よる航走体没水面への空気供給装置によれば、大気圧と
開口部に接する水の圧力との差により空気が没水面へ供
給され、この没水面上の膜体表面と水との間に空気層を
形成することができ特別の動力装置が必要なくなるので
ある。[0007] Preferably, a projection is provided on the submerged surface near the opening and at the front of the traveling body in the traveling direction, and the pressure of the water in contact with the opening is set to the atmospheric pressure. A valve element that opens when equal to or less than
This valve body is preferably configured to be operated by a signal of a pressure sensor provided in the opening. According to the air supply device for the immersed body submerged surface with such a configuration, air is supplied to the immersed surface by the difference between the atmospheric pressure and the pressure of the water in contact with the opening, and the film surface on the immersed surface and An air layer can be formed with the water, and no special power unit is required.
【０００８】[0008]
【発明の実施の形態】以下図面を参照して本発明による
航走体没水面への空気供給装置の実施例を説明する。図
１は航走体としてのボート１の概略側面図、図２は底面
図であって、このボート１の没水面である底板２の表面
及び船側３の一部没水面３ａには図３に示されるように
撥水性材料よりなる膜体４が被覆されている。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of an apparatus for supplying air to a submerged vehicle according to the present invention; 1 is a schematic side view of a boat 1 as a sailing body, FIG. 2 is a bottom view, and FIG. 3 shows a surface of a bottom plate 2 which is a submerged surface of the boat 1 and a partially submerged surface 3a of a ship side 3. As shown, a film body 4 made of a water repellent material is covered.
【０００９】この膜体４は前記したように、例えばポリ
テトラフルオロエチレン等よりなる撥水性材料５を図４
に示すように塗膜６の表面へ突出させるようにして構成
することによってこの膜体４の表面には微細な凹凸が形
成する。このような表面には凹部７に空気ａ1 が保持さ
れる性質を持つ。そしてその表面に次の空気ａ2 が供給
されると凹部７内の空気ａ1 と次の空気ａ2 とが合体し
て空気層ｂを形成する性質を持っている。As described above, the film body 4 is made of a water-repellent material 5 made of, for example, polytetrafluoroethylene, as shown in FIG.
As shown in (1), the surface of the film body 4 has fine irregularities by projecting to the surface of the coating film 6. Such a surface has a property that the air a 1 is held in the recess 7. When the next air a 2 supplied with air a 1 and the following air a 2 of the recess 7 has the property of forming an air layer b coalesce on the surface.
【００１０】この空気層ｂは、ボート１が航走したとき
その一部は、具体的には水ｗと接する側の空気層ｂの一
部は気泡となって後方に流出するが、膜体４の表面側の
空気ａ3 はその表面の凹部７内に捕捉されている空気ａ
1 によって付着して空気層ｂの厚みが変動しながらも底
板２の表面に薄く保持されることになる。そのためこの
気泡となって流出した空気のみを空気供給装置によりこ
の没水面３ａを被覆する膜体４の表面へ供給すれば良い
ことになる。When the boat 1 sails, a part of the air layer b, specifically, a part of the air layer b on the side in contact with the water w flows out as air bubbles. The air a 3 on the surface side of the surface 4 is the air a 3 trapped in the recess 7 on the surface.
While the thickness of the air layer b fluctuates due to the adherence by 1 , the air layer b is kept thin on the surface of the bottom plate 2. Therefore, only the air that has flowed out as bubbles and needs to be supplied to the surface of the film body 4 covering the submerged surface 3a by the air supply device.
【００１１】このような没水面３ａに撥水性材料５から
なる膜体４を形成したボート１の前部の底板２の面には
図２に示すように複数の開口部８が設けられている。こ
の開口部８は図５に示されるように底板２の外表面と船
内とを連通させる開口８ａを持つ管８ｂで構成されてい
る。そしてこの管８ｂの上端は、図１に示すように吃水
線ＷＬ上にまで延びて設けられている。A plurality of openings 8 are provided on the surface of the bottom plate 2 at the front of the boat 1 in which the film body 4 made of the water repellent material 5 is formed on the submerged surface 3a as shown in FIG. . As shown in FIG. 5, the opening 8 is constituted by a pipe 8b having an opening 8a for communicating the outer surface of the bottom plate 2 with the inside of the ship. The upper end of the pipe 8b is provided so as to extend over the draft line WL as shown in FIG.
【００１２】この管８ｂが図６に示すように吃水線ＷＬ
以下にある場合には弁体９が設けられて開口８ａより侵
入した水が管８ｂより噴出しないようになっている。こ
の弁体９は開口８ａの近傍に設けた圧力センサ１０（あ
るいは圧力スイッチでも良い）と増幅器１１の信号Ｖ1
により操作されるよう構成される。即ち、この圧力セン
サ１０により開口８ａにおける水圧を検知し、その信号
Ｖ1 が所定値、具体的には水圧が大気圧と等しいかそれ
より小となったときは弁体９を開放するよう操作され
る。勿論、この弁体９は必要に応じて前記したように水
圧が大気圧と等しいかそれより小となったとき開放する
逆止弁とすることも出来る。The pipe 8b is connected to the water line WL as shown in FIG.
In the following cases, a valve element 9 is provided so that water that has entered through the opening 8a does not blow out from the pipe 8b. This valve element 9 is provided with a pressure sensor 10 (or a pressure switch may be provided) near the opening 8 a and a signal V 1 of an amplifier 11.
Is configured to be operated. That is, to detect the pressure at the opening 8a by the pressure sensor 10, the signal V 1 is the predetermined value, when the specific pressure became equal to or Less than the atmospheric pressure so as to open the valve element 9 operating Is done. Of course, this valve element 9 can be a check valve that opens when the water pressure becomes equal to or less than the atmospheric pressure as described above, if necessary.
【００１３】前記管８ｂの開口８ａの近傍の進行方向の
前方に円弧状の突起１２を設けてボート１が航走中はこ
の突起１２の抵抗によってその背後に負圧を発生するよ
うに配慮している。図７は開口部８の他の実施例を示す
ものであって、この開口部８はボート１の進行方向に対
し、後方に開口するようなノズル１３を持つ管８ｂで構
成したものである。この構造の開口部８においてはボー
ト１の航走中はノズル１３の後方に負圧が発生するの
で、この場合は図う６に示した突起１１を省略すること
ができる。An arc-shaped projection 12 is provided forward of the pipe 8b near the opening 8a in the direction of travel so that a negative pressure is generated behind the boat 1 by the resistance of the projection 12 while the boat 1 is sailing. ing. FIG. 7 shows another embodiment of the opening 8, which is constituted by a tube 8 b having a nozzle 13 that opens rearward in the traveling direction of the boat 1. In the opening 8 having this structure, a negative pressure is generated behind the nozzle 13 while the boat 1 is traveling, so that the projection 11 shown in FIG. 6 can be omitted in this case.
【００１４】かゝる構成による航走体であるボート１が
航走すると、底板２に設けた開口部８に接する水圧が低
下し、大気圧以下になるとこの開口部８から空気が没水
面３ａに形成された膜体４の表面に供給されて空気層ｂ
が形成されて保持されるのである。When the boat 1, which is a sailing body having such a structure, sails, the water pressure in contact with the opening 8 provided in the bottom plate 2 decreases. Is supplied to the surface of the film body 4 formed in
Is formed and held.
【００１５】[0015]
【発明の効果】以上の説明から明らかなように本発明に
よる航走体没水面への空気供給装置によれば特別の動力
装置を設けることなく空気を供給することができ、その
結果、構造を複雑にすることなく航走時の速度を増すこ
とができるという効果がある。As is apparent from the above description, according to the air supply device for the immersion surface of a vehicle underwater according to the present invention, air can be supplied without providing a special power unit. There is an effect that the speed at the time of cruising can be increased without complicating.
【図１】本発明による航走体没水面への空気供給装置の
実施例を説明するボートの概略側面図である。FIG. 1 is a schematic side view of a boat illustrating an embodiment of an apparatus for supplying air to a submerged surface of a vehicle according to the present invention.
【図２】図１のボートの底面図である。FIG. 2 is a bottom view of the boat of FIG.
【図３】没水面の一部断面図である。FIG. 3 is a partial sectional view of a submerged surface.
【図４】図３の一部の拡大図である。FIG. 4 is an enlarged view of a part of FIG. 3;
【図５】開口部の拡大図である。FIG. 5 is an enlarged view of an opening.
【図６】開口部の他の実施例の拡大図である。FIG. 6 is an enlarged view of another embodiment of the opening.
【図７】開口部の更に他の実施例の拡大図である。FIG. 7 is an enlarged view of still another embodiment of the opening.
１ ボート ２ 底板 ３ 船側 ４ 膜体 ５ 撥水性材料 ６ 塗膜 ７ 凹部 ８ 開口部 ９ 弁体 １０ 圧力センサー １２ 突起 １３ ノズル DESCRIPTION OF SYMBOLS 1 Boat 2 Bottom plate 3 Ship side 4 Film body 5 Water-repellent material 6 Coating film 7 Depression 8 Opening 9 Valve body 10 Pressure sensor 12 Projection 13 Nozzle
Claims (4)
の膜体を形成し、該膜体表面に空気を供給して、該膜体
表面と水との間に空気層を形成して航走するような航走
体において、 該航走体の前部であって、かつ前記没水面の膜体表面に
大気に連通する開口部を設け、前記航走体が航走すると
き前記大気の圧力と前記開口部に接する水の圧力との差
により前記膜体表面に空気を供給するように構成した航
走体没水面への空気供給装置。An air-trapping film made of a water-repellent material is formed on a submerged surface, air is supplied to the surface of the film, and an air layer is formed between the surface of the film and water. An opening that communicates with the atmosphere at a front part of the sailing body and at the surface of the submerged film body, wherein the sailing body is capable of sailing. And an air supply device for supplying air to the surface of the membrane body by a difference between a pressure of the water and a pressure of water in contact with the opening.
走体の進行方向前部に突起物を設けてなる請求項１記載
の航走体没水面への空気供給装置。2. The air supply device for submerging an underwater vehicle according to claim 1, wherein a projection is provided on the submerged surface near the opening and at a front portion in the traveling direction of the vehicle.
大気圧と等しいか又は少なるとき開放する弁体を設けて
なる請求項１又は２記載の航走体没水面への空気供給装
置。3. The air to the submerged body submerged surface according to claim 1, wherein the opening is provided with a valve that opens when the pressure of water in contact with the opening is equal to or less than the atmospheric pressure. Feeding device.
センサーの信号により操作されるよう構成された請求項
３記載の弁体。4. The valve body according to claim 3, wherein a pressure sensor is disposed in the opening, and is operated by a signal from the pressure sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8158291A JPH107070A (en) | 1996-06-19 | 1996-06-19 | Air supply system for submerged hull |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8158291A JPH107070A (en) | 1996-06-19 | 1996-06-19 | Air supply system for submerged hull |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH107070A true JPH107070A (en) | 1998-01-13 |
Family
ID=15668403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8158291A Withdrawn JPH107070A (en) | 1996-06-19 | 1996-06-19 | Air supply system for submerged hull |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH107070A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001066410A1 (en) * | 2000-03-10 | 2001-09-13 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Frictional resistance reducing method, and ship with reduced frictional resistance |
| US6748891B2 (en) | 1999-06-08 | 2004-06-15 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Frictional resistance reducing method, and ship with reduced frictional resistance |
| 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 |
| JP2015199480A (en) * | 2014-04-06 | 2015-11-12 | 一夫 有▲吉▼ | Energy saving vessel whose speed is increased by reducing friction resistance of sea water |
| CN118953572A (en) * | 2024-07-31 | 2024-11-15 | 哈尔滨工业大学 | A cavitation formation method for drag reduction of underwater vehicle |
-
1996
- 1996-06-19 JP JP8158291A patent/JPH107070A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6748891B2 (en) | 1999-06-08 | 2004-06-15 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Frictional resistance reducing method, and ship with reduced frictional resistance |
| WO2001066410A1 (en) * | 2000-03-10 | 2001-09-13 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Frictional resistance reducing method, and ship with reduced frictional resistance |
| 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 |
| JP2015199480A (en) * | 2014-04-06 | 2015-11-12 | 一夫 有▲吉▼ | Energy saving vessel whose speed is increased by reducing friction resistance of sea water |
| CN118953572A (en) * | 2024-07-31 | 2024-11-15 | 哈尔滨工业大学 | A cavitation formation method for drag reduction of underwater vehicle |
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| Date | Code | Title | Description |
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| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20030902 |