JPH06329085A - Jet water suction port part structure for water jet type catamaran ship - Google Patents
Jet water suction port part structure for water jet type catamaran shipInfo
- Publication number
- JPH06329085A JPH06329085A JP12457293A JP12457293A JPH06329085A JP H06329085 A JPH06329085 A JP H06329085A JP 12457293 A JP12457293 A JP 12457293A JP 12457293 A JP12457293 A JP 12457293A JP H06329085 A JPH06329085 A JP H06329085A
- Authority
- JP
- Japan
- Prior art keywords
- jet
- suction port
- hull
- water
- turning
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ウォータージェット式
双胴船のジェット水吸込口部構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jet water suction port structure of a water jet catamaran.
【０００２】[0002]
【従来の技術】従来のウォータージェット式船舶のジェ
ット水吸込口は、ビニールシートや紙、木片などの浮遊
物が吸込ダクト内に吸い込まれるのを避けるために、ス
リット状や網目状のカバーを設けたものがある。しか
し、吸込口にビニールや布状物が吸引付着して吸込口を
閉塞することがあった。そのため、開口部の両側に船首
尾方向のフェンスをそれぞれ突設し、吸込口の開口面に
おいて左右前方からの浮遊物の誘引吸入を防ぐものが提
案されている。2. Description of the Related Art The jet water suction port of a conventional water jet type ship is provided with a slit-like or mesh-like cover in order to prevent suspended matter such as vinyl sheets, paper and wood chips from being sucked into the suction duct. There is something. However, vinyl or cloth-like material may be suctioned and adhered to the suction port to block the suction port. Therefore, it has been proposed that fences extending in the bow-stern direction are provided on both sides of the opening to prevent the attraction and inhalation of suspended matter from the left and right front at the opening surface of the suction port.
【０００３】[0003]
【発明が解決しようとする課題】ところで、双胴型高速
船舶は、高速航行時には大きく浮上し、左右船体間の喫
水線が舷側側より低くなり、特に旋回時には船体が大き
く傾斜することから、特に船体中心側から空気を巻き込
んで吸い込みやすく、キャビティーションを起こすこと
があった。By the way, a catamaran type high-speed ship is particularly hulled during high-speed navigation because the waterline between the left and right hulls becomes lower than the port side, and the hull inclines particularly when turning. It was easy for air to be sucked in from the center side, which sometimes caused cavitation.
【０００４】本発明は、上記問題点を解決して、浮遊物
の吸い込みを防止するとともに、高速旋回時においても
空気の吸い込みを防止することができるウォータージェ
ット式双胴船のジェット水吸込口部構造を提供すること
を目的とする。The present invention solves the above problems and prevents the inhalation of suspended solids and the inhalation of air even during high-speed turning of a water jet catamaran. It is intended to provide a structure.
【０００５】[0005]
【課題を解決するための手段】上記問題点を解決するた
めに本発明は、左右の船体底部にそれぞれ形成されたジ
ェット水吸込口の開口部両側部に、船首尾方向に沿って
フェンスを垂下し、これら左右のフェンスのうち船体中
心側のフェンスの高さを船体外側のフェンスより大きく
設定したものである。SUMMARY OF THE INVENTION In order to solve the above problems, the present invention hangs a fence along the bow-stern direction on both sides of an opening of a jet water suction port formed in each of the left and right hull bottoms. However, of the left and right fences, the height of the fence on the center side of the hull is set larger than that of the fence on the outside of the hull.
【０００６】[0006]
【作用】上記構成によれば、ジェット水吸込口の両側に
突設したフェンスにより、浮遊物の吸い込みを防止し、
かつ高速航行時には船体の横滑りを防止して直進性を向
上させるとともに、船体中心側のフェンス高さを大きく
したので、高速航行時に左右の船体間の喫水線が大幅に
低下し、さらに高速旋回することにより、船体間喫水線
が低下した場合でも、空気の巻き込み吸引を防止してキ
ャビテーションの発生を防止することができる。According to the above structure, the fences protruding from both sides of the jet water suction port prevent the suction of suspended matter,
In addition, in order to prevent the sides of the hull from slipping during high-speed navigation to improve straightness and to increase the height of the fence on the center side of the hull, the draft line between the left and right hulls during high-speed navigation is greatly reduced, and it is necessary to turn at a higher speed. As a result, even when the water line between the hulls is lowered, it is possible to prevent the entrapment and suction of air and prevent the occurrence of cavitation.
【０００７】[0007]
【実施例】以下、本発明に係るウォータージェット式双
胴船のジェット水吸込口部の一実施例を図面に基づいて
説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the jet water suction port of a water jet catamaran according to the present invention will be described below with reference to the drawings.
【０００８】図１に示すように、ウォータージェット推
進装置をそれぞれ後部に備えた左右の船体１，２には、
に船底部１ａ，２ａにウォータージェット水を吸入する
ジェット水吸込口３が形成されている。このジェット水
吸込口３の両側部には、それぞれ浮遊物の吸い込みを防
止するために、船首尾方向に沿う翼型断面のフェンス４
Ａ，４Ｂがそれぞれ垂下されており、このフェンス４
Ａ，４Ｂにより、直進航行性を向上させるとともに、旋
回時の横滑りを防止している。また、このフェンス４
Ａ，４Ｂの内、船体中心ＣＬ側のフェンス４Ａの高さＨ
ｉが船体外側のフェンス４Ｂの高さＨｏより大きく設定
され、これにより船体間喫水線ＷＬｉ低下時の空気の吸
い込みを防止している。As shown in FIG. 1, the left and right hulls 1 and 2 each equipped with a water jet propulsion device at their rear portions,
A jet water suction port 3 for sucking water jet water is formed in the ship bottoms 1a and 2a. On both sides of the jet water suction port 3, fences 4 each having a wing-shaped cross section along the bow-stern direction are provided in order to prevent the suction of suspended matter.
A and 4B are hung respectively, and this fence 4
A and 4B improve straight-line navigation and prevent skid during turning. Also, this fence 4
Of the A and 4B, the height H of the fence 4A on the CL side of the hull center
i is set to be larger than the height Ho of the fence 4B on the outer side of the hull, which prevents the intake of air when the inter-hull waterline WLi is lowered.
【０００９】すなわち、図２に示すように、吸込管５が
接続されたジェット水吸込口３は舷側方向の幅がＤ、船
首尾方向の長さがＬｉに形成されている。また、フェン
ス４Ａ，４Ｂは長さＬｆ≒Ｌｉに形成されるとともに、
ジェット水吸込口３よりＦ≒Ｄだけ船首側に取り付けら
れている。そして、船体中心ＣＬ側のフェンス４Ａの高
さＨｉ＝０．６×Ｄに形成され、また船体外側のフェン
ス４Ｂの高さＨｏ＝０．４×Ｄに形成されている。That is, as shown in FIG. 2, the jet water suction port 3 to which the suction pipe 5 is connected has a width D in the port side direction and a length Li in the bow-stern direction. Further, the fences 4A and 4B are formed to have a length Lf≈Li, and
It is attached to the bow side from the jet water suction port 3 by F≈D. The height of the fence 4A on the side of the center CL of the ship is Hi = 0.6 × D, and the height of the fence 4B on the outside of the ship is Ho = 0.4 × D.
【００１０】上記構成によれば、高速航行時に船体１，
２が浮き上がって、船体１，２間の喫水線ＷＬｉが外側
の喫水線ＷＬｏより低位となり、さらに旋回する場合に
は、喫水線ＷＬｉが下がってジェット水吸込口３に海水
と共に空気を巻き込んで吸引するおそれがあるが、高さ
の高い船体中心ＣＬ側のフェンス４Ａにより、未然に防
止することができ、高速旋回時のキャビテーションの発
生を防ぐことができる。また、このフェンス４Ａ，４Ｂ
により、浮遊物の吸い込みを防止し、直進航行性を向上
させて旋回時の横滑りを防止することができる。According to the above structure, the hull 1,
2 floats, the waterline WLi between the hulls 1 and 2 becomes lower than the outer waterline WLo, and when the vehicle further turns, the waterline WLi may drop and the air may be entrained in the jet water suction port 3 together with the seawater and sucked. However, the fence 4A on the side of the center CL of the hull, which has a high height, can prevent the occurrence of cavitation during high-speed turning. In addition, this fence 4A, 4B
As a result, it is possible to prevent the inhalation of suspended solids, improve the straight traveling performance, and prevent skid during turning.
【００１１】[0011]
【発明の効果】以上に述べたごとく本発明によれば、ジ
ェット水吸込口の両側に突設したフェンスにより、浮遊
物の吸い込みを防止し、かつ高速航行時には船体の横滑
りを防止して直進性を向上させるとともに、船体中心側
のフェンス高さを大きくしたので、高速航行時に左右の
船体間の喫水線が大幅に低下し、さらに高速旋回するこ
とにより、船体間喫水線が低下した場合でも、空気の巻
き込み吸引を防止してキャビテーションの発生を防止す
ることができる。As described above, according to the present invention, the fences projecting on both sides of the jet water suction port prevent the suction of floating substances and prevent the hull from sliding sideways during high speed navigation. The height of the fence near the center of the hull has been increased, and the water line between the left and right hulls has been significantly reduced during high-speed navigation. It is possible to prevent scavenging and prevent cavitation.
【図１】本発明に係るウォータージェット式双胴船の一
実施例を示す船体底部の横断面図である。FIG. 1 is a cross-sectional view of the bottom of a hull showing an embodiment of a water jet catamaran according to the present invention.
【図２】同ウォータージェット式双胴船のジェット水吸
込口を示し、（ａ）は吸込口の側面図、（ｂ）は吸込口
の底面図である。FIG. 2 shows a jet water suction port of the water jet catamaran, (a) is a side view of the suction port, and (b) is a bottom view of the suction port.
1,2 船体 1a,2a 船底 ３ ジェット水吸込口 ４Ａ 船体中心側フェンス ４Ｂ 船体外側フェンス ＣＬ 船体中心 ＷＬｉ 船体間喫水線 Ｈｉ 船体中心側フェンス高さ Ｈｏ 船体外側フェンス高さ 1,2 Hull 1a, 2a Bottom 3 Jet water suction port 4A Hull center side fence 4B Hull outer fence CL Hull center WLi Hull inter-waterline line Hi Hull center side fence height Ho Hull outer fence height
Claims (1)
ェット水吸込口の開口部両側部に、船首尾方向に沿って
フェンスを垂下し、これら左右のフェンスのうち船体中
心側のフェンスの高さを船体外側のフェンスより大きく
設定したことを特徴とするウォータージェット式双胴船
のジェット水吸込口部構造。1. A fence is hung along the bow-stern direction at both sides of the opening of the jet water suction port formed at the bottom of each of the left and right hulls. The water jet inlet structure of a water jet catamaran is characterized in that it is set larger than the fence outside the hull.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12457293A JP2894923B2 (en) | 1993-05-27 | 1993-05-27 | Jet water inlet structure of water jet catamaran |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12457293A JP2894923B2 (en) | 1993-05-27 | 1993-05-27 | Jet water inlet structure of water jet catamaran |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06329085A true JPH06329085A (en) | 1994-11-29 |
| JP2894923B2 JP2894923B2 (en) | 1999-05-24 |
Family
ID=14888806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12457293A Expired - Lifetime JP2894923B2 (en) | 1993-05-27 | 1993-05-27 | Jet water inlet structure of water jet catamaran |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2894923B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5548364B2 (en) * | 2006-10-03 | 2014-07-16 | 日本化薬株式会社 | Polymer conjugates of resorcinol derivatives |
| US8920788B2 (en) | 2008-03-18 | 2014-12-30 | Nippon Kayaku Kabushiki Kaisha | High-molecular weight conjugate of physiologically active substances |
| US8940332B2 (en) | 2006-05-18 | 2015-01-27 | Nippon Kayaku Kabushiki Kaisha | High-molecular weight conjugate of podophyllotoxins |
| US9018323B2 (en) | 2010-11-17 | 2015-04-28 | Nippon Kayaku Kabushiki Kaisha | Polymer derivative of cytidine metabolic antagonist |
| US9149540B2 (en) | 2008-05-08 | 2015-10-06 | Nippon Kayaku Kabushiki Kaisha | Polymer conjugate of folic acid or folic acid derivative |
| US9346923B2 (en) | 2011-09-11 | 2016-05-24 | Nippon Kayaku Kabushiki Kaisha | Method for manufacturing block copolymer |
| US9434822B2 (en) | 2004-09-22 | 2016-09-06 | Nippon Kayaku Kabushiki Kaisha | Block copolymer, micelle preparation, and anticancer agent containing the same as active ingredient |
| USRE46190E1 (en) | 2007-09-28 | 2016-11-01 | Nippon Kayaku Kabushiki Kaisha | High-molecular weight conjugate of steroids |
-
1993
- 1993-05-27 JP JP12457293A patent/JP2894923B2/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9434822B2 (en) | 2004-09-22 | 2016-09-06 | Nippon Kayaku Kabushiki Kaisha | Block copolymer, micelle preparation, and anticancer agent containing the same as active ingredient |
| US8940332B2 (en) | 2006-05-18 | 2015-01-27 | Nippon Kayaku Kabushiki Kaisha | High-molecular weight conjugate of podophyllotoxins |
| JP5548364B2 (en) * | 2006-10-03 | 2014-07-16 | 日本化薬株式会社 | Polymer conjugates of resorcinol derivatives |
| USRE46190E1 (en) | 2007-09-28 | 2016-11-01 | Nippon Kayaku Kabushiki Kaisha | High-molecular weight conjugate of steroids |
| US8920788B2 (en) | 2008-03-18 | 2014-12-30 | Nippon Kayaku Kabushiki Kaisha | High-molecular weight conjugate of physiologically active substances |
| US9149540B2 (en) | 2008-05-08 | 2015-10-06 | Nippon Kayaku Kabushiki Kaisha | Polymer conjugate of folic acid or folic acid derivative |
| US9018323B2 (en) | 2010-11-17 | 2015-04-28 | Nippon Kayaku Kabushiki Kaisha | Polymer derivative of cytidine metabolic antagonist |
| US9346923B2 (en) | 2011-09-11 | 2016-05-24 | Nippon Kayaku Kabushiki Kaisha | Method for manufacturing block copolymer |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2894923B2 (en) | 1999-05-24 |
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