JPH0620719Y2 - Propeller duct for ice sea vessels - Google Patents
Propeller duct for ice sea vesselsInfo
- Publication number
- JPH0620719Y2 JPH0620719Y2 JP1985125013U JP12501385U JPH0620719Y2 JP H0620719 Y2 JPH0620719 Y2 JP H0620719Y2 JP 1985125013 U JP1985125013 U JP 1985125013U JP 12501385 U JP12501385 U JP 12501385U JP H0620719 Y2 JPH0620719 Y2 JP H0620719Y2
- Authority
- JP
- Japan
- Prior art keywords
- ice
- propeller
- guard
- duct
- duct body
- 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.)
- Expired - Lifetime
Links
Landscapes
- Prevention Of Electric Corrosion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
【考案の詳細な説明】 考案の技術分野 この考案は、氷海船用プロペラ・ダクトに関する。TECHNICAL FIELD OF THE INVENTION The present invention relates to a propeller duct for an ice-sea ship.
従来の技術 氷海船においては、プロペラの保護および推進効率の向
上を図るために円筒状のプロペラ・ダクトが設けられる
ことが多い。2. Description of the Related Art In an ice-sea ship, a cylindrical propeller duct is often provided in order to protect the propeller and improve propulsion efficiency.
考案が解決しようとする課題 しかしながら、氷海船の後進時においては、後方からダ
クト内に氷片が侵入したり、氷片がダクトの後端にへば
りついたりすることがある。このため、後進時に、プロ
ペラが破損したり、推進力が低下するといった問題があ
る。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, when the ice sea ship is moving backward, ice pieces may enter the duct from the rear, or the ice pieces may cling to the rear end of the duct. Therefore, there is a problem that the propeller is damaged or the propulsive force is reduced when the vehicle is moving backward.
この考案は、氷海船の後進時において、プロペラが破損
したり、推進力が低下したりするのを防止できしかも氷
海船前進時の推進性をも向上しうる氷海船用プロペラ・
ダクトを提供することを目的とする。This invention is a propeller for an ice-sea ship that can prevent the propeller from being damaged or the propulsion force from decreasing when the ice-sea ship moves backward, and can also improve the propulsion property when the ice-sea ship moves forward.
The purpose is to provide a duct.
課題を解決するための手段 この考案による氷海船用プロペラ・ダクトは、筒状のプ
ロペラ・ダクト本体と、プロペラ・ダクト本体の後端に
設けられた氷侵入防止用ガードとを備え、氷侵入防止用
ガードは、プロペラ・ダクト本体の後端の複数箇所から
それぞれ後方にのびかつ後端がダクト本体の中心軸の後
方延長線上で互いに結合された複数のガード部材からな
り、各ガード部材の横断面が翼形に形成されるととも
に、氷海船前進時のプロペラ後流に対して迎角を持つよ
うに、翼の向きが設定されているものである。Means for Solving the Problems A propeller duct for an ice-sea ship according to the present invention comprises a tubular propeller duct body and an ice intrusion prevention guard provided at the rear end of the propeller duct body, and The guard is composed of a plurality of guard members that extend rearward from a plurality of positions on the rear end of the propeller duct body and that are connected to each other on the rear extension line of the central axis of the duct body. It is formed in the shape of an airfoil, and the direction of the wings is set so that it has an angle of attack with respect to the wake of the propeller when the ice sea ship advances.
作用 この考案による氷海船用プロペラ・ダクトは、筒状のプ
ロペラ・ダクト本体と、プロペラ・ダクト本体の後端に
設けられた氷侵入防止用ガードとを備え、氷侵入防止用
ガードは、プロペラ・ダクト本体の後端の複数箇所から
それぞれ後方にのびかつ後端がダクト本体の中心軸の後
方延長線上で互いに結合された複数のガード部材からな
るものであるから、氷海船の後進時に、氷片がプロペラ
・ダクト本体内に侵入したり、氷片がプロペラ・ダクト
本体の後端にへばりついたりすることがない。The propeller duct for an ice sea ship according to the present invention comprises a tubular propeller duct body and an ice intrusion prevention guard provided at the rear end of the propeller duct body, and the ice intrusion prevention guard is the propeller duct. Since the rear end is composed of a plurality of guard members that extend rearward from a plurality of positions on the rear end of the main body and are connected to each other on the rear extension line of the central axis of the duct main body, when the ice sea ship moves backward, ice pieces No intrusion into the propeller duct body or ice fragments sticking to the rear end of the propeller duct body.
また、各ガード部材の横断面が翼形に形成されるととも
に、氷海船前進時のプロペラ後流に対して迎角を持つよ
うに、翼の向きが設定されているから、各ガード部材に
斜め前向きの揚力が発生し、これが推進力に寄与する。In addition, the cross section of each guard member is formed in a wing shape, and the direction of the wing is set so that it has an angle of attack with respect to the wake of the propeller when the ice sea vessel is advancing. Positive lift is generated, which contributes to propulsion.
実施例 第１図〜第３図は、この考案の第１実施例を示す。Embodiment FIG. 1 to FIG. 3 show a first embodiment of the present invention.
氷海船用プロペラ・ダクト（１）は、氷海船のスクリュ
ー・プロペラ（４）を囲むように設けられた円筒状のダ
クト本体（２）と、プロペラ・ダクト本体（２）の後端
に設けられた氷侵入防止用ガード（３）とを備えてい
る。The propeller duct for an ice-sea vessel (1) is provided at the rear end of the propeller duct body (2) and a cylindrical duct body (2) provided so as to surround the screw propeller (4) of the ice-sea vessel. It is equipped with an ice intrusion prevention guard (3).
氷侵入防止用ガード（３）は、プロペラ・ダクト本体
（２）の後端の４箇所からそれぞれ後方にのびかつ後端
がダクト本体（２）の中心軸（スクリュー・プロペラの
中心軸と一致する）（Ｌ）の後方延長線上で互いに結合
された４本のガード部材（３ｂ）からなり、第３図に示
すように、各ガード部材（３ｂ）の横断面が翼形に形成
されるとともに、氷海船前進時のプロペラ後流（矢印Ｓ
で示す）に対して迎角（θ）を持つように、翼の向きが
設定されている。（３ａ）は４本のガード部材（３ｂ）
の後端結合部である。The ice intrusion prevention guard (3) extends rearward from each of four positions on the rear end of the propeller duct main body (2), and the rear end coincides with the central axis of the duct main body (2) (the central axis of the screw propeller). ) (L) consists of four guard members (3b) connected to each other on the rear extension line, and as shown in FIG. 3, the cross section of each guard member (3b) is formed in a wing shape, and Wake of propeller during forward movement of ice sea ship (arrow S
The direction of the wing is set so as to have an angle of attack (θ). (3a) is four guard members (3b)
This is the rear end coupling part.
ガード部材（３ｂ）における翼の向きが上述のように設
定されているので、氷海船前進時斜め前向きの揚力（矢
印Ｆで示す）が発生する。Since the direction of the wings of the guard member (3b) is set as described above, an obliquely forward lift force (indicated by arrow F) is generated when the ice-sea vessel is moving forward.
第４図および第５図は、この考案の第２実施例を示す。
このプロペラ・ダクト（１）においては、氷侵入防止用
ガード（３）が３本のガード部材（３ｂ）から構成され
ており、かつ各ガード部材（３ｂ）は、結合部（３ａ）
とダクト本体（２）の後端とを結ぶ直線に対して内方に
湾曲している。その他は、第１実施例と同様である。4 and 5 show a second embodiment of the present invention.
In this propeller duct (1), the ice intrusion prevention guard (3) is composed of three guard members (3b), and each guard member (3b) has a coupling portion (3a).
Is curved inwardly with respect to a straight line connecting the rear end of the duct body (2). Others are the same as those in the first embodiment.
考案の効果 この考案による氷海船用プロペラ・ダクトによれば、氷
海船の後進時に、氷片がプロペラ・ダクト本体内に侵入
したり、氷片がプロペラ・ダクト本体の後端にへばりつ
いたりしないから、後進時に氷片によってスクリュー・
プロペラが破損したり、推進力が低下したりするのが防
止される。Effect of the Invention According to the propeller duct for an ice sea ship according to the present invention, when the ice sea ship moves backward, ice pieces do not enter the propeller duct body and the ice pieces do not cling to the rear end of the propeller duct body. When moving backward, the ice pieces screw
The propeller is prevented from being damaged or the propulsion force is reduced.
また、氷海船の前進時、本来ならば抵抗体となって推進
性能を低下させるガード部材が、上述のように揚力を発
生させるので逆に推進性能が向上する。Further, when the ice-sea ship advances, the guard member, which originally serves as a resistor and reduces the propulsion performance, generates lift as described above, so conversely the propulsion performance is improved.
第１図〜第３図は、この考案の第１実施例を示し、第１
図は側面図、第２図は背面図、第３図は氷海船前進時の
プロペラ後流に対して迎角を持つようにガード部材の翼
の向きを設定した場合におけるプロペラ後流と揚力との
関係を説明するガード部材の横断面図である。 第４図および第５図はこの考案の第２実施例を示し、第
４図は側面図、第５図は背面図である。 （１）…プロペラ・ダクト、（２）…ダクト本体、
（３）…氷侵入防止用ガード、（３ａ）…結合部、（３
ｂ）…ガード部材、（４）…スクリュー・プロペラ、
（Ｓ）…プロペラ後流、（θ）…迎角。1 to 3 show a first embodiment of the present invention.
The figure is a side view, Fig. 2 is a rear view, and Fig. 3 is the propeller wake and lift when the wing direction of the guard member is set so as to have an angle of attack with respect to the propeller wake when the ice sea vessel is advancing. FIG. 6 is a cross-sectional view of a guard member for explaining the relationship between 4 and 5 show a second embodiment of the present invention, FIG. 4 is a side view and FIG. 5 is a rear view. (1) ... propeller duct, (2) ... duct body,
(3) ... Guard for preventing ice intrusion, (3a) ... Coupling portion, (3
b) ... guard member, (4) ... screw propeller,
(S) ... Wake behind the propeller, (θ) ... Angle of attack.
───────────────────────────────────────────────────── フロントページの続き (72)考案者 田中 陽 兵庫県神戸市中央区東川崎町３丁目１番１ 号 川崎重工業株式会社神戸工場内 (72)考案者 野沢 和男 兵庫県神戸市中央区東川崎町３丁目１番１ 号 川崎重工業株式会社神戸工場内 (56)参考文献 特開 昭62−6891（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yo Tanaka, 3-1, 1-1 Higashikawasaki-cho, Chuo-ku, Kobe-shi, Hyogo Prefecture Kawasaki Heavy Industries, Ltd. Kobe factory (72) Kazuo Nozawa, Higashi-kawasaki-cho, Chuo-ku, Kobe-shi, Hyogo 3-1, 1-1 Kawasaki Heavy Industries, Ltd. Kobe factory (56) References Japanese Patent Laid-Open No. 62-6891 (JP, A)
Claims (1)
ロペラ・ダクト本体（２）の後端に設けられた氷侵入防
止用ガード（３）とを備え、氷侵入防止用ガード（３）
は、プロペラ・ダクト本体（２）の後端の複数箇所から
それぞれ後方にのびかつ後端がダクト本体（２）の中心
軸（Ｌ）の後方延長線上で互いに結合された複数のガー
ド部材（３ｂ）からなり、各ガード部材（３ｂ）の横断
面が翼形に形成されるとともに、氷海船前進時のプロペ
ラ後流（Ｓ）に対して迎角（θ）を持つように、翼の向
きが設定されている氷海船用プロペラ・ダクト。1. An ice intrusion prevention guard (3) comprising a tubular propeller duct body (2) and an ice intrusion prevention guard (3) provided at the rear end of the propeller duct body (2). )
Is a plurality of guard members (3b) that extend rearward from a plurality of positions on the rear end of the propeller duct body (2) and are connected to each other on the rear extension line of the central axis (L) of the duct body (2). ), The cross section of each guard member (3b) is formed in a wing shape, and the direction of the wing is such that it has an angle of attack (θ) with respect to the propeller wake (S) when the ice-sea vessel is advancing. Propeller duct for ice sea ships that has been set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985125013U JPH0620719Y2 (en) | 1985-08-13 | 1985-08-13 | Propeller duct for ice sea vessels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985125013U JPH0620719Y2 (en) | 1985-08-13 | 1985-08-13 | Propeller duct for ice sea vessels |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6232895U JPS6232895U (en) | 1987-02-26 |
| JPH0620719Y2 true JPH0620719Y2 (en) | 1994-06-01 |
Family
ID=31017539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985125013U Expired - Lifetime JPH0620719Y2 (en) | 1985-08-13 | 1985-08-13 | Propeller duct for ice sea vessels |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0620719Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115158620B (en) * | 2022-08-09 | 2024-04-05 | 江苏科技大学 | Ice separation protection device for nacelle propeller and design method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS626891A (en) * | 1985-07-02 | 1987-01-13 | Nippon Kokan Kk <Nkk> | propeller protection device |
-
1985
- 1985-08-13 JP JP1985125013U patent/JPH0620719Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6232895U (en) | 1987-02-26 |
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