JPH0752888A - Rudder of ship - Google Patents
Rudder of shipInfo
- Publication number
- JPH0752888A JPH0752888A JP20795293A JP20795293A JPH0752888A JP H0752888 A JPH0752888 A JP H0752888A JP 20795293 A JP20795293 A JP 20795293A JP 20795293 A JP20795293 A JP 20795293A JP H0752888 A JPH0752888 A JP H0752888A
- Authority
- JP
- Japan
- Prior art keywords
- rudder
- rudder blade
- ship
- blade
- stern
- 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
Landscapes
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
- Hydraulic Turbines (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、船舶の舵に係り、特
に、舵板の形状を改良することにより舵効き性を向上さ
せた船舶の舵に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rudder of a ship, and more particularly to a rudder of a ship whose steering efficiency is improved by improving the shape of a rudder plate.
【０００２】[0002]
【従来の技術】図５に示すように、一般に、船舶１にお
いてその船尾部２に設けられる舵としては、舵板３がそ
の船首部３ｃにおいて舵心軸５に取り付けられ、舵板３
はその形状が船軸及び船舷方向の断面略矩形状のものが
採用されている。そして、図６に示すように、船舶１の
推進中に舵板３を操舵して例えば船軸に対して左舷側に
舵角θを与えると、舵板３の左舷側はこれに推進スクリ
ュ４からの海水等が衝突して圧力が上昇し、右舷側は圧
力が減少してこれらの差圧による舵板３乃至船尾部２を
右舷側に向ける揚力Ｆが発生する。この揚力Ｆによっ
て、船舶１はその船尾部２が右舷方向に押しずらされ進
行方向を左舷方向に変えることになる。2. Description of the Related Art Generally, as shown in FIG. 5, as a rudder provided on a stern portion 2 of a ship 1, a rudder plate 3 is attached to a rudder shaft 5 at a bow portion 3c thereof, and a rudder plate 3
As for the shape, a substantially rectangular cross-section is adopted in the direction of the axis and the side of the ship. Then, as shown in FIG. 6, when the rudder blade 3 is steered during propulsion of the ship 1 to give a steering angle θ to the port side with respect to the ship axis, for example, the port side of the rudder blade 3 has a propulsion screw 4 attached thereto. The seawater and the like collide with each other to increase the pressure, and the pressure on the starboard side decreases, and a lift F that directs the rudder blade 3 or the stern portion 2 toward the starboard side is generated due to the pressure difference. Due to the lift force F, the stern portion 2 of the ship 1 is pushed in the starboard direction and the traveling direction is changed to the port direction.
【０００３】[0003]
【発明が解決しようとする課題】ところで、上記した舵
を有する船舶の操舵性を高めようとすると、以下に述べ
るような問題がある。By the way, if an attempt is made to improve the steerability of a ship having the above-mentioned rudder, there are the following problems.
【０００４】 舵板の数を増加させればよいが、操舵
機構が複雑化してしまう。Although it is sufficient to increase the number of rudder blades, the steering mechanism becomes complicated.
【０００５】 舵板面積を増加させればよいが、これ
により操舵抵抗が増加し、より大きな操舵力が必要とな
り操舵機構が大型化してしまう。Although it is sufficient to increase the area of the rudder blade, this increases steering resistance and requires a larger steering force, resulting in an increase in size of the steering mechanism.
【０００６】 舵角を増やせばよいが、舵板にはその
形状によって決定される最大揚力を発生する舵角（即ち
迎え角）があり、それ以上舵角を増やすと揚力が低下す
る（所謂ストール）ので限界がある。Although the rudder angle may be increased, the rudder blade has a rudder angle (that is, an attack angle) that generates a maximum lift determined by its shape, and if the rudder angle is further increased, the lift decreases (so-called stall). ), So there is a limit.
【０００７】そこで、本発明の目的は、上記課題を解決
し、舵板の形状を改良することにより舵効き性を向上さ
せた船舶の舵を提供することにある。Therefore, an object of the present invention is to solve the above-mentioned problems and to provide a rudder of a ship in which the steering efficiency is improved by improving the shape of the rudder blade.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するため
に本発明に係る船舶の舵は、舵板の下辺部を舵心軸より
船尾方向後方に順次下方に傾斜させると共に舵心軸側か
ら船尾方向後方に舵板の断面積を順次拡大し、且つ上記
舵板の下辺部に沿った端縁を鉛直方向に臨ませて尖端状
に形成したものである。In order to achieve the above object, a vessel rudder according to the present invention comprises a rudder plate, a lower side portion of which is slanted downward in the stern direction rearward from a rudder shaft and from the rudder shaft side. The cross-sectional area of the rudder blade is gradually increased rearward in the stern direction, and the edge along the lower side of the rudder blade is vertically faced to form a pointed shape.
【０００９】また、上記舵板が、その上辺部が舵心軸よ
り船尾方向後方に順次上方に傾斜され、且つ上記舵板の
上辺部に沿った端縁が鉛直方向に臨んで尖端状に形成さ
れたものである。In addition, the rudder blade is formed such that the upper side portion is inclined upward in the stern direction rearward from the rudder axis and the edge along the upper side portion of the rudder plate faces in the vertical direction and has a pointed shape. It was done.
【００１０】[0010]
【作用】上記構成により、舵板に舵角を与えるとその舵
角を与えた反対側の下辺部或いは上辺部に沿った端縁に
海水等のたて渦が生じ、その側の圧力をさらに減少させ
てより大きな揚力を発生させることができ、これによっ
て舵効き性を向上することができる。With the above structure, when a rudder angle is given to the rudder blade, a vertical vortex of seawater or the like is generated at the edge along the lower side or the upper side opposite to the side where the rudder angle is given, and the pressure on that side is further increased. It can be reduced to generate a larger lift, which can improve the steering efficiency.
【００１１】[0011]
【実施例】以下本発明の一実施例を添付図面に基づいて
詳述する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
【００１２】図１に示すように、舵板３は、その下辺部
３ａが舵心軸５より船尾方向後方に順次下方に傾斜され
ると共に、その上辺部３ｂが舵心軸５より船尾方向後方
に順次上方に傾斜されて、舵心軸５側から船尾方向後方
に向けて断面積が順次拡大されるよう形成される。換言
すれば、舵板３は船首側から船尾側に向けて縦長が順次
伸長され、船軸方向の縦断面台形状に形成されたウエッ
ジ・シェイプとなっている。また舵板３は、その船首部
３ｃに船舷方向の縦断面矩形状とされる舵心軸５の取付
部６を有し、その取付部６より船尾側の下辺部３ａ及び
上辺部３ｂに沿った下端縁３ｄ及び上端縁３ｅが、それ
ぞれ鉛直方向に臨んだ尖端状とされて船舷方向の縦断面
六角形状に形成される。このように尖端状に形成された
下端縁３ｄ及び上端縁３ｅのエッジ角αは７０°以下に
設定される。As shown in FIG. 1, the rudder blade 3 has a lower side portion 3a which is sequentially inclined downward and rearward from the rudder shaft 5 and an upper side portion 3b which is rearward and rearward of the rudder shaft 5. Is formed so that the cross-sectional area is gradually increased from the rudder shaft 5 side toward the rear in the stern direction. In other words, the rudder blade 3 has a wedge shape in which the longitudinal direction is sequentially extended from the bow side toward the stern side and is formed in a trapezoidal longitudinal cross section in the axial direction. Further, the rudder blade 3 has a mounting portion 6 of the rudder shaft 5 having a rectangular longitudinal cross section in the boat direction on the bow portion 3c, and extends along the lower side portion 3a and the upper side portion 3b of the stern side of the mounting portion 6. The lower edge 3d and the upper edge 3e each have a pointed shape facing the vertical direction, and are formed in a hexagonal longitudinal cross section in the port direction. The edge angle α of the lower edge 3d and the upper edge 3e, which are formed in a pointed shape in this way, is set to 70 ° or less.
【００１３】次に実施例の作用を述べる。Next, the operation of the embodiment will be described.
【００１４】図２に示すように、船舶１の推進中、舵板
３に例えば左舷側の舵角θを与えると舵板３を右舷側に
押しずらす揚力Ｆが発生するが、その舵角θを与えた反
対側、即ち右舷側の下端縁３ｄ及び上端縁３ｅに図示す
るような海水等のたて渦ｒが発生する。このたて渦ｒに
より、舵板３の舵角θを与えた反対側の圧力をより減少
させ結果的に大きな揚力Ｆを得ることができ、これによ
って舵効き性を向上することができる。As shown in FIG. 2, when the rudder blade 3 is given a rudder angle θ on the port side while the ship 1 is propelled, a lift F that pushes the rudder plate 3 to the starboard side is generated. A vertical vortex r of seawater or the like as shown in the drawing is generated at the lower end edge 3d and the upper end edge 3e on the starboard side, which is the opposite side to which the water is applied. Due to the vertical vortices r, the pressure on the opposite side of the rudder blade 3 to which the rudder angle θ is applied can be further reduced, and as a result, a large lift F can be obtained, whereby the steering efficiency can be improved.
【００１５】このたて渦ｒ発生のメカニズムを詳細に説
明する。図２（ａ）に示すように、舵板３には流速Ｖの
海水等の流れが衝突し、その流速Ｖの舵板３に対して垂
直方向の成分である流速Ｖu が舵板３に作用して揚力Ｆ
を発生させる。図２（ｂ）に示すように、舵板３の上端
縁３ｅ付近に衝突した流速Ｖu はその上端縁３ｅに沿っ
て上昇し、上辺部３ｂから弧状の軌跡を描いて離脱す
る。舵板３の右舷側では流速Ｖより低い流速Ｖs （図２
（ａ）参照）となるので、離脱直後では高い流速Ｖu と
低い流速Ｖs との間に非常に薄い不連続層ｌができる。
不連続層ｌはその層内に小渦ｒs の場を有しているが、
粘性の影響で不連続層ｌは連続になるよう拡散し、小渦
ｒs は次第に大渦ｒl となっていく。この過程により、
舵板３の右舷側には図２（ｃ）に示すようなスパイラル
状のたて渦ｒが発生することになる。The mechanism of the generation of the vertical vortex r will be described in detail. As shown in FIG. 2A, a flow of seawater or the like having a flow velocity V collides with the rudder blade 3, and a flow velocity V u, which is a component of the flow velocity V in a direction perpendicular to the rudder blade 3, is applied to the rudder blade 3. Acting lift F
Generate. As shown in FIG. 2B, the flow velocity V u colliding with the vicinity of the upper edge 3e of the rudder blade 3 rises along the upper edge 3e and leaves the upper side portion 3b in an arcuate locus. On the starboard side of the rudder blade 3, a flow velocity V s lower than the flow velocity V (see FIG. 2).
(See (a)), a very thin discontinuous layer 1 is formed between the high flow velocity V u and the low flow velocity V s immediately after the separation.
The discontinuous layer l has a field of small vortices r s in the layer,
Due to the effect of viscosity, the discontinuous layer 1 diffuses so as to be continuous, and the small vortex r s gradually becomes the large vortex r l . Through this process,
On the starboard side of the rudder blade 3, a spiral vertical swirl r as shown in FIG. 2C is generated.
【００１６】ここで、舵板３は船首側から船尾側に向け
て縦長が順次伸長されているので、推進に伴ってこのた
て渦ｒを上下に逃がさず順次後方に発達させながら送る
よう保持することができる。Since the longitudinal direction of the rudder blade 3 is sequentially extended from the bow side to the stern side, the vertical swirl r is not released upward and downward along with the propulsion, but is maintained so as to be gradually developed rearward. can do.
【００１７】次に変形実施例について述べる。Next, a modified embodiment will be described.
【００１８】図３に示すように、この第一の変形実施例
においては、舵板３はその左舷側のみ下端縁３ｄ及び上
端縁３ｅにおいてエッジが落とされ、船舷方向の縦断面
縦長の台形状に形成される。このように舵板３を形成し
ても舵効き性を向上することができる。尚、このように
すると操舵方向の左右によって舵の効きが異なることが
懸念されるが、その影響はほとんど無視できる程度であ
り、それよりも下端縁３ｄ及び上端縁３ｅを尖端状にし
たことによる効果の方が顕著に現れる。よって、舵板３
の右舷側のみエッジを落とす形状としてもよい。また、
片側のみエッジを落とすので両側を行う場合に比べ加工
の手間が半減し加工費を削減することができる。As shown in FIG. 3, in the first modified embodiment, the rudder blade 3 has a trapezoidal shape with a vertically long longitudinal section in the port side, in which the edges are dropped at the lower end edge 3d and the upper end edge 3e only on the port side. Is formed. Even if the rudder blade 3 is formed in this way, the steering effectiveness can be improved. Although there is a concern that the steering effect will differ depending on the left and right of the steering direction in this way, the effect is almost negligible, and the lower end edge 3d and the upper end edge 3e are made sharper than that. The effect is more prominent. Therefore, the rudder blade 3
The edge may be dropped only on the starboard side. Also,
Since the edge is dropped only on one side, the labor required for machining is reduced to half and the machining cost can be reduced as compared with the case of performing both sides.
【００１９】また図４に示すように、この第二の変形実
施例においては、舵板３は、図１の実施例同様その下辺
部３ａが船尾方向斜め下に伸長され下端縁３ｄは尖端状
とされるが、その上辺部３ｂは略水平に伸長され上端縁
３ｅは尖端状とされず、船舷方向の縦断面縦長の五角形
状に形成される。特に、舵板３の上方は船舶の外板（図
５参照）に覆われるので上記たて渦ｒは上方に逃げずら
く、他方舵板３の下方は開放されており下方には逃げや
すくなっていることから、このように舵板３の下部の形
状を変えるだけでも舵効き性を向上することができる。Further, as shown in FIG. 4, in the second modified embodiment, the rudder blade 3 has a lower side portion 3a extending obliquely downward in the stern direction and a lower end edge 3d having a pointed shape, as in the embodiment of FIG. However, the upper side portion 3b is extended substantially horizontally and the upper end edge 3e is not formed into a pointed shape, but is formed in a pentagonal shape having a vertically long vertical cross section in the port direction. In particular, since the upper part of the rudder plate 3 is covered by the outer plate of the ship (see FIG. 5), the vertical vortex r is hard to escape upward, while the lower part of the rudder plate 3 is open and easily escapes downward. Therefore, the steering efficiency can be improved only by changing the shape of the lower portion of the rudder blade 3 in this manner.
【００２０】尚、以上実施例の他にも舵板３の形状は様
々考えられ、例えば船首側から船尾側に向けてアール状
に伸長するよう形成してもよい。In addition to the above embodiment, various shapes of the rudder blade 3 are conceivable. For example, the rudder blade 3 may be formed to extend in a rounded shape from the bow side toward the stern side.
【００２１】[0021]
【発明の効果】本発明は次の如き優れた効果を発揮す
る。The present invention exhibits the following excellent effects.
【００２２】（１）舵板の形状を改良することにより大
きな揚力を発生させ、舵効き性を向上することができ
る。(1) By improving the shape of the rudder blade, a large lift can be generated and the steering efficiency can be improved.
【００２３】（２）構造を複雑化せず舵効き性を向上す
ることができ、軽量化、コスト等の点で有利である。(2) The steering efficiency can be improved without complicating the structure, which is advantageous in terms of weight reduction and cost.
【図１】本発明に係る船舶の舵の一実施例を示す斜視図
である。FIG. 1 is a perspective view showing an embodiment of a rudder of a ship according to the present invention.
【図２】舵板に発生するたて渦を示す図である。FIG. 2 is a diagram showing vertical vortices generated on a rudder blade.
【図３】舵板の第一の変形実施例を示す斜視図である。FIG. 3 is a perspective view showing a first modified embodiment of the rudder blade.
【図４】舵板の第二の変形実施例を示す斜視図である。FIG. 4 is a perspective view showing a second modified example of the rudder blade.
【図５】船舶及び従来の舵を示す図で、（ａ）は側面
図、（ｂ）はＡ−Ａ線断面図である。5A and 5B are diagrams showing a ship and a conventional rudder, in which FIG. 5A is a side view and FIG. 5B is a sectional view taken along line AA.
【図６】船舶の操舵状態を示す上面図である。FIG. 6 is a top view showing a steering state of the ship.
３ 舵板 ３ａ 下辺部 ３ｄ 下端縁 ５ 舵心軸 3 Rudder plate 3a Lower side part 3d Lower end edge 5 Rudder axis
Claims (2)
に順次下方に傾斜させると共に舵心軸側から船尾方向後
方に舵板の断面積を順次拡大し、且つ上記舵板の下辺部
に沿った端縁を鉛直方向に臨ませて尖端状に形成してな
ることを特徴とする船舶の舵。1. A lower side of the rudder blade is sequentially inclined downward from the rudder shaft rearward in the stern direction, and a cross-sectional area of the rudder plate is sequentially enlarged from the rudder shaft side rearward in the stern direction. A rudder of a ship, characterized in that an edge along the part is formed in a pointed shape so as to face in the vertical direction.
尾方向後方に順次上方に傾斜され、且つ上記舵板の上辺
部に沿った端縁が鉛直方向に臨んで尖端状に形成された
請求項１記載の船舶の舵。2. The rudder blade is formed such that the upper side portion is inclined upward in the stern direction rearward from the rudder axis and the end edge along the upper side portion of the rudder plate faces in the vertical direction and has a pointed shape. The ship rudder according to claim 1, which has been applied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20795293A JP3203896B2 (en) | 1993-08-23 | 1993-08-23 | Ship rudder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20795293A JP3203896B2 (en) | 1993-08-23 | 1993-08-23 | Ship rudder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0752888A true JPH0752888A (en) | 1995-02-28 |
| JP3203896B2 JP3203896B2 (en) | 2001-08-27 |
Family
ID=16548261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20795293A Expired - Fee Related JP3203896B2 (en) | 1993-08-23 | 1993-08-23 | Ship rudder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3203896B2 (en) |
-
1993
- 1993-08-23 JP JP20795293A patent/JP3203896B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3203896B2 (en) | 2001-08-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101094539B1 (en) | Stern shape for displacement type ship | |
| EP0527270B1 (en) | Ship rudder | |
| JPS5830896A (en) | Reaction rudder without discontinuous part | |
| JPS6035693A (en) | Device for affecting initial inflow current of propeller | |
| JP2552808Y2 (en) | Boat rudder | |
| JPH06305487A (en) | Rudder | |
| JP3306115B2 (en) | Airfoil with streamlined airfoil for ships | |
| JPH0752888A (en) | Rudder of ship | |
| JPH08318896A (en) | Course stabilizing fin of vessel | |
| JP2002274490A (en) | High lift rudder for ship | |
| EP0051073A1 (en) | Catamaran type boat | |
| JPS6036556Y2 (en) | Vessel with stern vortex canceling fins | |
| JP2006123849A (en) | Rudder device for ship | |
| JP4116986B2 (en) | Stern structure in high-speed ship | |
| KR101886920B1 (en) | Rudder for ship | |
| JP2554773B2 (en) | Rudder | |
| JP2004074886A (en) | Ship | |
| JPH0326069Y2 (en) | ||
| JPS6226311Y2 (en) | ||
| KR101844415B1 (en) | Rudder for ship | |
| JP2002293294A (en) | High-lift twin rudder system for marine vessel | |
| JPH06247388A (en) | Rudder structure of ship | |
| KR100980656B1 (en) | High lift rudder for vessel | |
| EP4206070A1 (en) | Rudder | |
| JPH08175478A (en) | Hull resistance reducing fin |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |