JP2003200890A - Propeller for vessel formed with curved rake at tip thereof - Google Patents
Propeller for vessel formed with curved rake at tip thereofInfo
- Publication number
- JP2003200890A JP2003200890A JP2001401304A JP2001401304A JP2003200890A JP 2003200890 A JP2003200890 A JP 2003200890A JP 2001401304 A JP2001401304 A JP 2001401304A JP 2001401304 A JP2001401304 A JP 2001401304A JP 2003200890 A JP2003200890 A JP 2003200890A
- Authority
- JP
- Japan
- Prior art keywords
- propeller
- rake
- tip
- degrees
- curved
- 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.)
- Pending
Links
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明はチップ部分に曲線型
レーキが形成された船舶用プロペラに係り、特に船舶用
プロペラのチップ部分に曲線型レーキを適用すること
で、チップ部分で発生する空洞現象を減少させることが
できるチップ部分に曲線型レーキを適用したプロペラに
関する。従って、本発明は空洞現象による船舶の震動と
騷音を大幅に低減させることができる。
【０００２】
【従来の技術】従来の大部分の船舶は運航中にプロペラ
の辺りにおいて空洞現象が発生する。空洞現象は水面に
近いところにあるプロペラのチップ部分で主に発生され
て消滅する。このような空洞現象の発生と消滅は船舶の
運航中に繰り返され、プロペラのチップ部分の流体領域
に変動圧力を起こす。この変動圧力はプロペラ上側の船
体に伝逹されて船体に震動と騷音を誘発する。このよう
な震動と騷音は、乗務員と乗客が留まっているところま
で伝逹されるので、乗船の快適感を低下させる主な原因
となる。また、空洞現象の発生と消滅によるこの変動圧
力は、震動と騷音が伝逹される部分に設置されている各
種機器の寿命を低減させたり損傷を与えたりする。
【０００３】
【発明が解決しようとする課題】本発明は従来の一般的
な直線型プロペラにおいて発生する空洞現象による問題
を解決ために、プロペラのチップ部分で発生する空洞現
状の体積と空洞現状による変動圧力を低減させて乗船の
快適感を改善すると共に、空洞現象による変動圧力によ
って各種機器の寿命が低減され、損傷を防止すべきチッ
プ部分に曲線型レーキを形成した船舶用プロペラを提供
する。
【０００４】
【課題を解決するための手段】本発明の課題は、主にエ
ンジン出力が５００馬力を超過する一般的な船舶用プロ
ペラにおいて、スキュー角度によって発生されるレーキ
を考慮しないで、プロペラの基準線に対してチップで１
５〜４５度の角度とハブで３〜１０度の角度のレーキと
を有し、最大のレーキ値が０．６〜０．９５r／Rに位置
するように最大の厚さ分布曲線の中心線が設定されるよ
うになっているチップ部分に曲線型レーキを形成した船
舶用プロペラによって達成される。
【０００５】
【発明の実施の形態】上述した目的を達成するための本
発明について添付図面を参照して詳細に説明する。
【０００６】図1は一般的なプロペラの側面図である。
１はプロペラ半径方向の各位置で羽の最大の厚さを表わ
し、スキュー角によって発生されるレーキは考慮せず描
かれている。２はプロペラのハブであり、３は船舶の船
首側であり、また、４はプロペラのボスカップが装着さ
れる側である。
【０００７】図２は本発明によってチップ部分に曲線型
レーキを形成したプロペラ側面図である。図２に示され
たように、１１はプロペラの半径方向の各位置で羽の最
大の厚さを表示しており、スキューカップによって発生
されるレーキは考慮しないで描かれている。１２はプロ
ペラの基準線で最大の厚さ分布曲線型の中心線が１５〜
４５度の角度をチップ部分で有することを示している。
１３はプロペラの基準線で最大の厚さ分布曲線型の中心
線が３〜１０度の角度をハブ部分で有することを示して
いる。１４は前記の１２と１３で始まった線がプロペラ
半径の０．６〜０．９５r／Rで最大値を有するようにし
て設定された形態を示している。
【０００８】図３は一般的なプロペラにおける空洞現象
の写真であり、図４は本発明によってチップ部分に曲線
型レーキが形成されたプロペラにおける空洞現象の写真
である。空洞現象について試験した結果、本発明による
と、一般的なプロペラに比べて空洞現象の面積において
は大きい変化がないが、空洞現象の体積は約30%以上低
減されることが分かった。また、本発明によると、一般
的なプロペラに比べてチップのボルテックスキャビテー
ションにおいても強度が非常に弱化されて、空洞及びチ
ップのボルテックスによる変動圧力値が約３０％低減さ
れるに計測される。従って、本発明のチップ部分に曲線
型レーキを適用したプロペラは有用であることが分か
る。
【０００９】本の発明は上述した特定の望ましい実試例
に限定されることなく、また本発明の要旨を脱すること
なく本発明が属する技術分野で通常の知識を持つ者なら
誰でも特許請求の範囲内で種々変形と応用が可能であ
る。
【００１０】
【発明の効果】上述のように、本発明のチップ部分に曲
線型レーキを適用したプロペラによると、一般的なプロ
ペラに比べて空洞現象の体積が約３０％以上低減され、
チップのボーテックスキャビテーションにおいても強度
が非常に弱化されて、空洞及びチップのボーテックスに
よる変動圧力値が約３０％低減される。従って、本発明
によると乗船の快適感が改善されると共に、各種器機の
寿命が低減され、損傷されることが防止される。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a marine propeller having a curved rake at a tip portion, and more particularly to a curved rake applied to a tip portion of a marine propeller. Thus, the present invention relates to a propeller in which a curved rake is applied to a tip portion capable of reducing a cavity phenomenon generated in the tip portion. Therefore, the present invention can greatly reduce the vibration and noise of the ship due to the cavity phenomenon. 2. Description of the Related Art In most conventional ships, a hollow phenomenon occurs around a propeller during operation. The hollow phenomenon mainly occurs at the tip of the propeller near the water surface and disappears. The occurrence and extinction of such cavitation are repeated during the operation of the ship, causing a fluctuating pressure in the fluid region at the tip of the propeller. This fluctuating pressure is transmitted to the hull above the propeller and induces vibration and noise in the hull. Such vibrations and noises are transmitted to places where crew and passengers stay, so that they are the main cause of a decrease in comfort on board. In addition, the fluctuating pressure due to the occurrence and disappearance of the hollow phenomenon reduces the life of or damages various devices installed in a portion where vibration and noise are transmitted. SUMMARY OF THE INVENTION The present invention solves the problem caused by the cavity phenomenon that occurs in a conventional general linear propeller by using the current volume and the current cavity generated in the tip portion of the propeller. Provided is a marine propeller in which a fluctuating pressure is reduced to improve the comfort of boarding, a fluctuating pressure due to a cavity phenomenon shortens the life of various devices, and a curved rake is formed on a tip portion to be prevented from being damaged. SUMMARY OF THE INVENTION An object of the present invention is to provide a general marine propeller mainly having an engine output exceeding 500 hp, without considering the rake generated by the skew angle. 1 chip with respect to the reference line
The center line of the maximum thickness distribution curve so that it has an angle of 5 to 45 degrees and a rake of 3 to 10 degrees at the hub, and the maximum rake value is located at 0.6 to 0.95 r / R. Is achieved by a marine propeller having a curved rake formed at a tip portion where the rake is set. DETAILED DESCRIPTION OF THE INVENTION The present invention for achieving the above-mentioned object will be described in detail with reference to the accompanying drawings. FIG. 1 is a side view of a general propeller.
1 represents the maximum thickness of the wing at each position in the radial direction of the propeller, and is drawn without considering the rake generated by the skew angle. 2 is a propeller hub, 3 is a bow side of the ship, and 4 is a side on which the boss cup of the propeller is mounted. FIG. 2 is a side view of a propeller in which a curved rake is formed on a tip portion according to the present invention. As shown in FIG. 2, 11 indicates the maximum thickness of the wing at each position in the radial direction of the propeller, and is drawn without considering the rake generated by the skew cup. 12 is the reference line of the propeller, and the center line of the maximum thickness distribution curve type is 15 to
This indicates that the tip has a 45-degree angle.
Reference numeral 13 indicates that the center line of the maximum thickness distribution curve type in the reference line of the propeller has an angle of 3 to 10 degrees in the hub portion. Reference numeral 14 denotes a configuration in which the lines starting with the lines 12 and 13 are set so as to have a maximum value at a propeller radius of 0.6 to 0.95 r / R. FIG. 3 is a photograph of a hollow phenomenon in a general propeller, and FIG. 4 is a photograph of a hollow phenomenon in a propeller having a curved rake formed on a chip portion according to the present invention. As a result of a test on the cavitation, it was found that, according to the present invention, the area of the cavitation did not change much as compared with a general propeller, but the volume of the cavitation was reduced by about 30% or more. In addition, according to the present invention, the strength is significantly weakened in the vortex cavitation of the tip as compared with a general propeller, and the fluctuation pressure value due to the vortex of the cavity and the tip is measured to be reduced by about 30%. Therefore, it can be seen that the propeller in which the curved rake is applied to the tip portion of the present invention is useful. The present invention is not limited to the specific preferred examples described above, and without departing from the spirit of the invention, any person having ordinary knowledge in the technical field to which the invention pertains can be claimed. Various modifications and applications are possible within the range described above. As described above, according to the propeller of the present invention in which the curved rake is applied to the tip portion, the volume of the cavity phenomenon is reduced by about 30% or more as compared with a general propeller.
The strength of the vortex cavitation of the chip is also greatly reduced, and the value of the fluctuating pressure due to the cavity and the vortex of the chip is reduced by about 30%. Therefore, according to the present invention, comfort on board is improved, and the life of various devices is reduced, and damage to the devices is prevented.
【図面の簡単な説明】
【図１】一般的なプロペラの側面図である。
【図２】本発明によってチップ部分に曲線型レーキを形
成したプロペラ側面図である。
【図３】一般的なプロペラにおける空洞現象の写真であ
る。
【図４】本発明によってチップ部分に曲線型レーキが形
成されたプロペラにおける空洞現象の写真である。
【符号の説明】
１ プロペラ半径方向の各位置での羽の最大の厚さ
２ プロペラのハブ
３ 船舶の船首側
４ プロペラのボスカップが装着される側
１１ プロペラの半径方向の各位置での羽の最大の厚さ
１２ プロペラの基準線での最大の厚さの分布曲線型の
中心線が１５〜４５度の角度をチップ部分で有すること
１３ プロペラの基準線での最大の厚さの分布曲線型の
中心線が３〜１０度の角度をハブ部分で有すること
１４ 前記の１２と１３で始まった線がプロペラ半径の
０．６〜０．９５r／Rで最大値を有するようにして設定
された形態BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a general propeller. FIG. 2 is a side view of a propeller having a curved rake formed on a tip portion according to the present invention. FIG. 3 is a photograph of a cavity phenomenon in a general propeller. FIG. 4 is a photograph of a cavity phenomenon in a propeller having a curved rake formed at a tip portion according to the present invention. [Description of Signs] 1 Maximum thickness of wing at each position in radial direction of propeller 2 Hub of propeller 3 Bow side of vessel 4 Side on which boss cup of propeller is mounted 11 Blade of wing at each position in radial direction of propeller Maximum thickness 12 Maximum thickness distribution curve type at the propeller reference line The center line of the tip part has an angle of 15 to 45 degrees at the tip part 13 Maximum thickness distribution curve type at the propeller reference line 14 has an angle of 3 to 10 degrees at the hub portion 14 The line starting at 12 and 13 is set to have a maximum value at the propeller radius of 0.6 to 0.95 r / R. Form
───────────────────────────────────────────────────── フロントページの続き (72)発明者 チェ ギル−ファン 大韓民国 ウルサン−シ ドン−ク トン ブ−ドン トンブ・アパート115−112（番 地なし) ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Choi Gil-Fan Republic of Korea Ulsan-Shi Dong-Ku Tong Boudon Thonbu Apartment 115-112 Without ground)
Claims (1)
で、 プロペラの基準線に対してチップで１５〜４５度の角度
と、 ハブで３〜１０度の角度のレーキとを有し、 最大のレーキ値が０．６〜０．９５r/Rに位置するよう
に最大の厚さ分布曲線の中心線が設定されることを特徴
とするチップ部分に曲線型レーキを形成した船舶用プロ
ペラ。In a marine propeller, an angle of 15 to 45 degrees at a tip with respect to a reference line of a propeller, and 3 to 10 degrees at a hub with respect to a reference line of the propeller without considering a rake generated by a skew angle. A rake at an angle of degrees, wherein the center line of the maximum thickness distribution curve is set such that the maximum rake value is located at 0.6 to 0.95 r / R. Marine propeller with a curved rake.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001401304A JP2003200890A (en) | 2001-12-28 | 2001-12-28 | Propeller for vessel formed with curved rake at tip thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001401304A JP2003200890A (en) | 2001-12-28 | 2001-12-28 | Propeller for vessel formed with curved rake at tip thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003200890A true JP2003200890A (en) | 2003-07-15 |
Family
ID=27640110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001401304A Pending JP2003200890A (en) | 2001-12-28 | 2001-12-28 | Propeller for vessel formed with curved rake at tip thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003200890A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010036600A (en) * | 2008-07-31 | 2010-02-18 | Mitsubishi Heavy Ind Ltd | Device and method for estimating fluctuating pressure on hull surface by propeller and program |
| KR101213781B1 (en) | 2010-06-03 | 2012-12-18 | 한국해양대학교 산학협력단 | high efficiency and low noise tidal blade of turbine for tidal stream power |
-
2001
- 2001-12-28 JP JP2001401304A patent/JP2003200890A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010036600A (en) * | 2008-07-31 | 2010-02-18 | Mitsubishi Heavy Ind Ltd | Device and method for estimating fluctuating pressure on hull surface by propeller and program |
| KR101213781B1 (en) | 2010-06-03 | 2012-12-18 | 한국해양대학교 산학협력단 | high efficiency and low noise tidal blade of turbine for tidal stream power |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20040309 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20040810 |