JPS60113795A - Propeller blade structure for ship propulsion unit - Google Patents

Abstract

PURPOSE:To give a vibration damping function to a propeller blade without changing the shape and material of the blade from the conventional one, by forming a hollow section in the blade, and as well by charging a vibration damping material whch is effective more than the material of the blade, in the hollow section. CONSTITUTION:A propeller blade is formed in the same shape and with the same material as those of a conventional one, but is formed therein with a hollow section 7. A vibration damping material 8 which is effective more than the material of the blade is charged in the hollow section 7. As the material 8, in addition to plastics, ruuber, control alloys, etc., granular materials such as, for example, sand or steel balls which exhibit a vibration damping effect due to their internal friction based upon the relative motion between particles, may be suitably used.

Description

【発明の詳細な説明】 （産業上の利用分野） この発明は船舶の推進器用プロペラ、特にトンネルスラ
スタ、首撫りスラスタ等に適用されるプロペラ羽根の改
良に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to improvements in propeller blades applied to propellers for ships, particularly tunnel thrusters, neck thrusters, and the like.

近年、海洋資源開発の活発化に伴い、海底調査、海底作
業が多くなる傾向にある。この種作業の実）Ｉに当たっ
ては、探査船、掘削１１０等の船舶を定点に保持する必
要があり、このため、海底と海−に船とを音響通信によ
っ（自動位置保持する手法が採用されているが、このｈ
’ｒ置装持をするための通信に対して船舶のＩＩＩ’　
＋［ｌｉ　！：目）るいはサイドスラスタ等から発生ず
る水中Ｓ！Ｉｆ、　Ａｏが妨げとならないように配慮し
なければならない。In recent years, as marine resource development has become more active, there has been an increase in the number of seabed surveys and seabed operations. When performing this kind of work, it is necessary to maintain vessels such as exploration vessels and drilling vessels at fixed points, and for this reason, a method of automatically maintaining the position of the vessels on the seabed and the sea through acoustic communication is adopted. However, this h
'III of the ship for communication to carry out r equipment'
+[li! : Eye) Underwater S generated from side thrusters, etc.! Care must be taken to ensure that If and Ao do not become a hindrance.

（従来技術） 第１図は舶用推進システムの一般的構成図、第２図は第
１図Ａ矢示方向からμたプロペラの後面図、第３図は第
２図’ａ−ａ線に於Ｕるプロペラ羽根の１４１ｉ面図で
ある。(Prior art) Fig. 1 is a general configuration diagram of a marine propulsion system, Fig. 2 is a rear view of a propeller taken from the direction of arrow A in Fig. 1, and Fig. 3 is a view taken along line 'a-a' in Fig. 2. It is a 141i side view of the propeller blade.

第１図において、動力源とする１１現１からの動力は減
速機２を経てｔｉ進輪軸３介してプロペラ４に伝達され
る。ここで主機１ならびに減速機２等の励起振動が図中
実線矢示ずイ、ようにプロペラ４に伝達され、プロペラ
４を３１１１　シて破線矢示するように水中雑音として
放射される。In FIG. 1, power from a power source 11 is transmitted to a propeller 4 via a speed reducer 2 and a drive wheel shaft 3. In FIG. Here, the excited vibrations of the main engine 1, reducer 2, etc. are transmitted to the propeller 4 as shown by the solid line arrow 3111 in the figure, and are radiated as underwater noise as shown by the broken line arrow 3111 through the propeller 4.

即ち、水中にて直接的に作動するプロペラ、あるいばス
ラスタに於いては、これらを駆動する動力源あるいは減
速機からの機械的振動が駆動軸を伝播し、プロペラ羽根
から水中に雑音として放射される。In other words, in propellers or thrusters that operate directly underwater, mechanical vibrations from the power source or reducer that drive them propagate through the drive shaft and are radiated into the water from the propeller blades as noise. be done.

また、第３図に示すようにプロペラ作動中には図中実線
矢ポするように、プロペラ羽根５の後流に乱れが生じ、
これによってプロペラ羽根５が励振され、このプロペラ
羽根と海水との間に生しる流れの乱れに起因したプロペ
ラ羽根の機械的振動が水中に雑音として放射される。Additionally, as shown in Figure 3, during propeller operation, turbulence occurs in the wake of the propeller blades 5, as indicated by the solid line arrow in the figure.
This excites the propeller blade 5, and mechanical vibrations of the propeller blade caused by the turbulence of the flow generated between the propeller blade and the seawater are radiated into the water as noise.

そこで、これらの雑音発生が、上記するような種類の船
舶の定点位置保持−ヒからの通信妨害となるもので、重
大な問題となり、これを防■ｌ二する必要があるのであ
る。Therefore, the generation of these noises becomes a serious problem since it interferes with communications from the above-mentioned types of ships that maintain a fixed position, and it is necessary to prevent this problem.

ところが、従来の海上にて定点位置保持を要する船舶の
Ｈ１′進器用プロペラにあっては、その強度、耐蝕性お
よび製作の容易さ等からの羽根４４車−１のｊ巽定かな
されてきており、上記する制振機能面からの検討はなさ
れていないのが現状である。However, for conventional propellers for H1' propellers for ships that need to maintain a fixed position at sea, the 44-impeller propeller has been established due to its strength, corrosion resistance, and ease of manufacture. Therefore, the current situation is that no consideration has been made from the perspective of the vibration damping function described above.

一方、割振能力を有する材料も開発され°ζいるが、こ
の種の材料を舶用のブＩ−ｌペセ羽根材料としての応用
例は一部例外を除いては１、し当たらない。これは、こ
の種制振材料がｌ　Ｍ；　Ｌ、た舶用プロペラ羽根材料
として要求される資質を満足しないか、あるいは満足し
たとして４）：ｌスト的な要素から特殊用途を除いて実
用化されていないのがその理由と考えられる。On the other hand, although materials having an allocating ability have been developed, with some exceptions, there are no examples of application of this type of material as a material for marine blades. This is because this type of damping material does not satisfy the qualities required as a marine propeller blade material, or even if it does, it cannot be put into practical use except for special purposes due to strategic factors. The reason may be that it is not.

（発明の目的） この発明は上記の点に鑑がｚ夕なされたものであって、
羽根形状および、羽根（（＊目９１／１東と同しくし、
これに割振機能を追加しまたプト１ベラ羽根を提供する
こ吉を目的とする。(Object of the invention) This invention has been made in consideration of the above points, and
The blade shape and blade ((*same as 91/1 East,
The aim is to add an allocation function to this and provide a 1-piece blade.

（発明の構成） この発明は、プロペラ羽根体内に空隙部を設け、該空隙
部に羽根材料より制（１ｎｉ　ＡＪ已１！のＩｎｉい制
振部材を封入したことを特徴とする舶用１１［輪姦用プ
ロペラ羽根構造を要旨とする０ので１らる。(Structure of the Invention) The present invention provides a marine 11[gang rape] characterized in that a cavity is provided in the propeller blade body, and a vibration damping member of 1ni AJ 1! is enclosed in the cavity from the blade material. The outline of the propeller blade structure is 0 so 1.

以下、この発明の実施例を図面に基づいて説明する。Embodiments of the present invention will be described below based on the drawings.

第４図乃至第７図はこの発明のプロペラ羽根構造を丞し
７、第４１９１はプロペラの一部後面図、第５図は第４
図ｂ−ｂ線に於ける断面図、第６図は他の実施例を示す
プロペラの一部後面１３１、第７図は第６図Ｃ，−Ｃ線
に於ける断面図である。4 to 7 show the propeller blade structure of the present invention, No. 4191 is a partial rear view of the propeller, and FIG. 5 is a partial rear view of the propeller.
FIG. 6 is a cross-sectional view taken along line bb--C in FIG. 6, a partial rear surface 131 of a propeller showing another embodiment, and FIG. 7 is a cross-sectional view taken along lines C and -C in FIG.

この発明のプロペラ羽根６０羽根形状および、羽根本体
＋４料は在来と同じくし、該羽根体内に空隙部７を設け
、該空隙部７に羽根本体材料より制振効果の高い割振部
材８を封入する。The propeller blade 60 of the present invention has the same blade shape and blade root body + 4 material as the conventional one, has a cavity 7 inside the blade body, and encloses in the cavity 7 a vibration-damping member 8 that has a higher damping effect than the blade body material. do.

尚、第６１Ｚ＋及び第７図に示す実施例は、羽根体内に
設げる空隙部７を＠壁９によって複数１１ｈ１に分割し
た構成のものである。The embodiment shown in FIG. 61Z+ and FIG. 7 has a configuration in which the cavity 7 provided within the blade body is divided into a plurality of 11h1 by @walls 9.

この発明に用いる割振部材８としては、羽根その他の１
１１゛状等については特に制限はないが、実用の材料と
しては、プラスチック、ゴム、制振合金等が用いられる
。これらの制振材料は材料そのものが制振材料とするも
のであるが、砂、鋼球のような粒子状物質のものも適す
る。As the distribution member 8 used in this invention, a blade or other material may be used.
Although there are no particular restrictions on the 11-inch shape, plastic, rubber, damping alloy, etc. are used as practical materials. These damping materials are those in which the material itself acts as a damping material, but particulate materials such as sand and steel balls are also suitable.

この粒子状物質の場合は、粒子相互の相対連動に基づ（
内部摩擦により制振機能を持たセたものである。In the case of particulate matter, it is based on the relative interlocking of particles (
It has a vibration damping function due to internal friction.

（作用効果） に記のように、この発明は、羽根本体にｃ：Ｕ在来の羽
根材料を用いることで、舶用ブ１１ベラとしての必要機
能を満足させ、更に羽＄１．！体内には空隙部を設けて
制振材料を封入したことによって、羽根全体として制振
機能を発揮するものであり、／毎１−にて定点位置保持
が要求される＃１）舶に適用し゛ζζプロペ羽根から放
射される水中雑音を防１トして通信妨害とならず、定点
位置保持を安定ざセることができるものであり、また制
振材料としては、強度、および耐蝕Ｐｌ゛の要求が不用
となるために、低コストの制振材料が選定可能となって
プロペラ全体の！Ｖ造コス日）低くして高性能のプ１コ
ペラを提供できる。(Operations and Effects) As described in , the present invention satisfies the functions necessary for a marine bellows by using the c:U conventional blade material for the blade root body, and further reduces the blade cost by $1. ! By creating a cavity inside the body and sealing it with damping material, the blade as a whole exhibits a vibration damping function. ζζIt prevents underwater noise radiated from the propeller blades, does not interfere with communication, and can maintain a stable fixed point position. Since this requirement is no longer required, it is possible to select low-cost damping materials for the entire propeller! It is possible to provide a high-performance P1 copera with a low cost.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は舶用推進システムの一般的構成図、第２図は第
１図Ａ矢示方向から見たプ１．Ｉベラの後面図、第３図
は第２図ａ−ａ線に於ｉＪるプロペラ羽根の断面図、第
４図乃至第７図はこの発明のプロペラ羽根構造を示し、
第４図はブロペクの一部後面図、第５図は第４図ｂ−ｂ
線に於ＬＪる１１１面図、第６図は他の実施例を示すプ
ロペラの一部後面図、第７図は第６図ｃ−ｃ線に於番ノ
る断面Ｈである。 １・・・１；機、２・・・減速機、３・・・１１Ｆ進器
、４・・・プＩＩペフ、５・・・プロペラ羽根、６・・
・プロペラ羽根、７・・・空隙部、８・・・割振部材、
９・・・隔壁。 酩４　図 闇　６図 品５図 ・・・　７ρFIG. 1 is a general configuration diagram of a marine propulsion system, and FIG. A rear view of the I-bell, FIG. 3 is a sectional view of the propeller blade taken along line a-a in FIG. 2, and FIGS. 4 to 7 show the propeller blade structure of the present invention.
Figure 4 is a partial rear view of Bropek, Figure 5 is Figure 4b-b
6 is a partial rear view of a propeller showing another embodiment, and FIG. 7 is a cross-sectional view taken along line cc in FIG. 6. 1...1; machine, 2...reducer, 3...11F advance gear, 4...PuIIpef, 5...propeller blade, 6...
・Propeller blade, 7... Gap part, 8... Allocation member,
9... Bulkhead. 4 illustrations dark 6 illustrations 5 illustrations... 7ρ

Claims (3)

【特許請求の範囲】[Claims] （１）羽根体内に空隙部を設け、該空隙部に羽根本体材
料より制振効果の高い制振部材を封入したことを特徴と
する舶用？１［進器用プロペラ羽根構造。(1) A marine vessel, characterized in that a void is provided in the blade body, and a vibration damping member having a higher vibration damping effect than the material of the blade base is enclosed in the void. 1 [Propeller blade structure for Shinki. （２）前記空隙部を複数区画に分割構成にしたことを特
徴とする特許請求の範囲第１項記載の舶用↑１＃進器用
プロペラ羽根構造。(2) The propeller blade structure for a marine ↑1# propeller according to claim 1, wherein the void portion is divided into a plurality of sections. （３）前記制振部材が粒子状物質であることを特徴とす
る特許請求の範囲第１項記載の舶用推進器用プロペラ羽
根構造。(3) The propeller blade structure for a marine propulsion device according to claim 1, wherein the vibration damping member is made of particulate matter.