JPS6270587A - Manganese-copper alloy propeller for ship - Google Patents
Manganese-copper alloy propeller for shipInfo
- Publication number
- JPS6270587A JPS6270587A JP60208740A JP20874085A JPS6270587A JP S6270587 A JPS6270587 A JP S6270587A JP 60208740 A JP60208740 A JP 60208740A JP 20874085 A JP20874085 A JP 20874085A JP S6270587 A JPS6270587 A JP S6270587A
- Authority
- JP
- Japan
- Prior art keywords
- propeller
- manganese
- copper alloy
- seawater
- vibration
- 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
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、海水中における腐食を防止した舶用マンガン
−銅合金プロペラに関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a marine manganese-copper alloy propeller that prevents corrosion in seawater.
（従来の技術）
海水中で使用される舶用プロペラは、耐食性の観点から
特殊用途を除き、銅合金の高力黄銅又はニッケル・アル
ミニウム青銅鋳物が使用されている。これら銅合金は、
銅を生成分とし、アルミニウム、マンガン、鉄、ニッケ
ル、亜鉛等からなり、機械的性質、海水中耐食性、加工
性、鋳造性および海水中腐食疲労が優れているが、防振
性能が劣っている。(Prior Art) Marine propellers used in seawater are made of high-strength copper alloy brass or nickel-aluminum bronze castings from the viewpoint of corrosion resistance, except for special purposes. These copper alloys are
Contains copper as a component, aluminum, manganese, iron, nickel, zinc, etc., and has excellent mechanical properties, seawater corrosion resistance, workability, castability, and seawater corrosion fatigue, but poor anti-vibration performance. .
近年、生活環境を害する振動騒音は、船舶関係でも重要
視され、その軽減対策が実施されている。また、石油開
発等の海底資源開発用堀削船などの検査船は音響機器を
用いており、振動による雑音軽減が必要である。特に、
船舶の起振源の中には、海水中の回転で振動騒音を発生
するプロペラがあり、プロペラによる振動を軽減するた
め、機械的な面と流体力字面から対策が九てられている
。In recent years, vibration noise that harms the living environment has become important in ships as well, and measures have been taken to reduce it. In addition, inspection vessels such as drilling vessels used for oil exploration and other submarine resource development use acoustic equipment, and it is necessary to reduce noise caused by vibration. especially,
Among the sources of vibration on ships are propellers that generate vibration and noise as they rotate in seawater, and in order to reduce the vibrations caused by propellers, a number of mechanical and hydrodynamic measures have been taken.
しかし、プロペラそれ自体の騒音軽減をすることが適切
なため、プロペラ材料に防振性能の優れたマンガン−銅
合金が使用されようとしている。しかし、プロペラ材と
して使用されているマンガン−銅合金は、海水中の自然
電極電位が飽和せ永電極基準で−（１，７Ｖ−ａ７５Ｖ
と鉄系材料と同等程度であるため、鉄系材料と接触して
使用される場合、マンガン−銅合金が腐食される。船舶
では、船体がほとんど鉄系材料であり、推進軸も鉄系材
料である。したがって、マンガン−銅合金を舶用プロペ
ラとして使用する場合、従来は、船体外板に亜鉛、アル
ミニウム等の犠牲陽極を取付けてプロペラ金防食する流
電陽極法が採用されている。しかじ、長期間航行する船
舶では、亜鉛が何らかの理由で異常に消耗するか、ある
いは脱落した場合、マンガン−銅合金プロペラの腐食量
が異常に増大し、最悪の場合は、プロペラ折損を生ずる
。又、この方法は、鉄系材料より電位が貴である銅合金
プロペラには効果的だが、マンガン−銅合金には防食効
果がない。However, since it is appropriate to reduce the noise of the propeller itself, a manganese-copper alloy with excellent vibration damping performance is being used as a propeller material. However, the manganese-copper alloy used as propeller material has a saturated natural electrode potential in seawater, which is -(1,7V-a75V) on a permanent electrode basis.
Since the corrosion rate is about the same as that of iron-based materials, manganese-copper alloys corrode when used in contact with iron-based materials. In ships, the hull is mostly made of iron-based material, and the propulsion shaft is also made of iron-based material. Therefore, when a manganese-copper alloy is used as a marine propeller, conventionally, a galvanic anode method has been employed to protect the propeller from corrosion by attaching a sacrificial anode of zinc, aluminum, or the like to the hull outer plate. However, in ships that sail for long periods of time, if zinc is abnormally consumed or falls off for some reason, the amount of corrosion on the manganese-copper alloy propeller will increase abnormally, and in the worst case, the propeller will break. Further, although this method is effective for copper alloy propellers whose potential is nobler than that of iron-based materials, it has no anticorrosive effect on manganese-copper alloys.
又、プロペラキャップに海水中で電位の低い亜鉛又はア
ルミニウムを付けたボンネットを使用し、プロペラを直
、接防食する方法がある。この方法は、耐食性の面から
は優れている。しかし、プロペラが亜鉛又にアルミニウ
ム付ボンネットとマンガン−銅合金プロペラ本体との複
合体となり、防振性能が低下する恐れがある。Another method is to directly protect the propeller from corrosion by using a bonnet coated with zinc or aluminum, which has a low potential in seawater, on the propeller cap. This method is excellent in terms of corrosion resistance. However, the propeller becomes a composite body of a bonnet with zinc or aluminum and a manganese-copper alloy propeller body, and there is a risk that the vibration-proofing performance will deteriorate.
（発明が解決しようとする問題点）
本発明の目的は、上記の欠点を解消した舶用マンガン−
銅合金プロペラを提供することである。(Problems to be Solved by the Invention) The object of the present invention is to solve the above-mentioned drawbacks by providing a marine manganese
Our purpose is to provide copper alloy propellers.
（問題点を解決するための手段）
本発明は、海水中の自然電極電位がマンガン−銅合金プ
ロペラ本体より卑であり、かつ振動減衰能のあるマンガ
ン−銅合金で作られた環状部材、およびプロペラキャッ
プをプロペラボス物のに先端面に設けたことを特徴とす
る舶用マンガン−銅合金プロペラに関する。(Means for Solving the Problems) The present invention provides an annular member made of a manganese-copper alloy whose natural electrode potential in seawater is less noble than that of the manganese-copper alloy propeller body and which has vibration damping ability; The present invention relates to a marine manganese-copper alloy propeller, characterized in that a propeller cap is provided on the tip end surface of a propeller boss.
（作 用）
以下、本発明について、図面と実施例を参照しつつ具体
的に説明する。第１図は、本発明の舶用マンガン−銅合
金プロペラの構造を示す。(Function) The present invention will be specifically described below with reference to the drawings and examples. FIG. 1 shows the structure of a marine manganese-copper alloy propeller of the present invention.
図中、１はマンガン−銅合金プロペラ、２および５は、
本発明において設は次項状部材およびプロペラキャップ
で、マンガン−銅合金プロペラ１の腐食を防止するもの
である。環状部材２およびプロペラキャップ３は、マン
ガン−銅合金プロペラ１よジ海水中における電位が卑で
ある必要があり、その上、振動減衰能全保持した上、そ
の位が類似しており、さらに環状部材２とマンガン−鋼
合金プロペラ１は、鋳造時において、完全に融着するも
のでなくてはならない。In the figure, 1 is a manganese-copper alloy propeller, 2 and 5 are
In the present invention, a following-shaped member and a propeller cap are provided to prevent corrosion of the manganese-copper alloy propeller 1. The annular member 2 and the propeller cap 3 must have a lower potential in seawater than the manganese-copper alloy propeller 1, and in addition, they must maintain full vibration damping ability and are similar in that respect. The member 2 and the manganese-steel alloy propeller 1 must be completely fused together during casting.
従って、これを実現するために、本発明の一実施例にお
いては、環状部材２全予じめ裏作しておき、マンガン−
銅合金プロペラ１を鋳造する際に、環状部材２を鋳ぐる
む方法を採つ友。環状部材２の材料には、プロペラ全体
の防振性能を保持するため、マンガン−鋼合金プロペラ
１の材料と同じように防振性能の優れたものが望ましい
ので、マンガン−銅合金を使用した。なお、４はプロペ
ラ軸、５はプロペラ固定用ナツトである。Therefore, in order to realize this, in one embodiment of the present invention, the entire annular member 2 is fabricated in advance, and manganese
When casting the copper alloy propeller 1, a method of casting the annular member 2 is used. As the material of the annular member 2, a manganese-copper alloy was used because it is desirable to have excellent vibration-proofing performance like the material of the manganese-steel alloy propeller 1 in order to maintain the vibration-damping performance of the entire propeller. Note that 4 is a propeller shaft, and 5 is a propeller fixing nut.
第１表は、試験結果を示す。Table 1 shows the test results.
実施例１および２は、直径５００ｍプロプラに本発明の
環状部材およびキャップを設けたもの、比較例１は、直
径５００■プロペラで環状部材およびキャップなしのも
の、比較例２は、銅合金プロペラである。Examples 1 and 2 are propellers with a diameter of 500 m provided with the annular member and cap of the present invention, Comparative Example 1 is a propeller with a diameter of 500 mm without the annular member and cap, and Comparative Example 2 is a propeller with a copper alloy. be.
５ケ月間の実用試験結果によれば、実施例１及び２の本
発明合金プロペラ表面には腐食が認められず、良好であ
ったが、比較例１では、プロペラ表面の腐食が激しかっ
た。又、比較例２では、銅合金プロペラの耐食性は良好
だが、防振効果がほとんどなかった。According to the practical test results for 5 months, the surfaces of the alloy propellers of the present invention in Examples 1 and 2 showed no corrosion and were in good condition, but in Comparative Example 1, the propeller surface was severely corroded. Furthermore, in Comparative Example 2, although the copper alloy propeller had good corrosion resistance, it had almost no vibration damping effect.
防振効果の判定には、合金の振動減衰能（Ｑ−りを横振
動内部摩擦測定装置を用いて測定した。To determine the vibration damping effect, the vibration damping ability (Q-reflection) of the alloy was measured using a transverse vibration internal friction measuring device.
測定試験片の形状は、厚さ２ｍ、横巾１（ｌ１ｍ＋。The shape of the measurement test piece is 2 m thick and 1 m wide (l1 m+).
長さ９０撃である。It is 90 shots long.
（発明の効果］
本発明の舶用マンガン−銅合金プロペラは、以下の効果
を有する。(Effects of the Invention) The marine manganese-copper alloy propeller of the present invention has the following effects.
（１）現用の銅合金プロペラに比較して、著しく騒音お
よび振動防止ができる。(1) Compared to current copper alloy propellers, noise and vibration can be significantly reduced.
（２） 従来の寸ンガンー銅合金プロペラに比べ耐食
性が優れており、舶用プロペラとして十分な信頼性が得
られる。(2) It has superior corrosion resistance compared to conventional copper alloy propellers, and has sufficient reliability as a marine propeller.
（３） プロペラ換装等の整備保守が容易である。(3) Maintenance such as propeller replacement is easy.
第１図は、本発明プロペラの概略構造金示す断面図であ
る。
１・・・プロペラ、２・・・環状部材（マンガン−銅合
金ン、３・―・グロベラキャップ（マンガン−銅合金）
、４・・・プロペラ軸、５・・・プロペラ固定用ナツト
復代理人 内 １） 明
復代理人 萩 原 亮 −
復代理人 安 西 篤 夫
手続補正書（方式）
昭和６１年 ２月１３目FIG. 1 is a sectional view showing the schematic structure of the propeller of the present invention. 1...Propeller, 2...Annular member (manganese-copper alloy), 3...Globella cap (manganese-copper alloy)
, 4...Propeller shaft, 5...Propeller fixing nut Sub-Agent 1) Meifu Agent Ryo Hagiwara - Sub-Agent Atsuo Anzai Procedural Amendment (Method) February 13, 1986
Claims (1)
より卑であり、かつ振動減衰能のあるマンガン−銅合金
で作られた環状部材、およびプロペラキャップをプロペ
ラボス部の■端面に設けたことを特徴とする舶用マンガ
ン−銅合金プロペラ。The natural electrode potential in seawater is less base than the manganese-copper alloy propeller body, and an annular member made of a manganese-copper alloy with vibration damping ability and a propeller cap are installed on the end face of the propeller boss. Characteristic marine manganese-copper alloy propeller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60208740A JPS6270587A (en) | 1985-09-24 | 1985-09-24 | Manganese-copper alloy propeller for ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60208740A JPS6270587A (en) | 1985-09-24 | 1985-09-24 | Manganese-copper alloy propeller for ship |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6270587A true JPS6270587A (en) | 1987-04-01 |
Family
ID=16561294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60208740A Pending JPS6270587A (en) | 1985-09-24 | 1985-09-24 | Manganese-copper alloy propeller for ship |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6270587A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7589614B2 (en) | 2000-11-29 | 2009-09-15 | Ensure Technologies, Inc. | Method of allowing access to an electronic device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4871310A (en) * | 1971-12-28 | 1973-09-27 | ||
| JPS5611300A (en) * | 1979-07-09 | 1981-02-04 | Jiyunshiyoku Shin | Centripetal rule used at various field |
-
1985
- 1985-09-24 JP JP60208740A patent/JPS6270587A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4871310A (en) * | 1971-12-28 | 1973-09-27 | ||
| JPS5611300A (en) * | 1979-07-09 | 1981-02-04 | Jiyunshiyoku Shin | Centripetal rule used at various field |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7589614B2 (en) | 2000-11-29 | 2009-09-15 | Ensure Technologies, Inc. | Method of allowing access to an electronic device |
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