JPS62181998A - Method for feeding lubricating oil to stern tube - Google Patents
Method for feeding lubricating oil to stern tubeInfo
- Publication number
- JPS62181998A JPS62181998A JP61023952A JP2395286A JPS62181998A JP S62181998 A JPS62181998 A JP S62181998A JP 61023952 A JP61023952 A JP 61023952A JP 2395286 A JP2395286 A JP 2395286A JP S62181998 A JPS62181998 A JP S62181998A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- lubricating oil
- propeller shaft
- shaft
- piping
- 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
- 239000010687 lubricating oil Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims description 6
- 239000003921 oil Substances 0.000 claims abstract description 57
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 238000004891 communication Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 abstract 1
- 239000000314 lubricant Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/38—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
- B63H21/386—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like for handling lubrication liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
- B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
- B63H5/08—Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller
- B63H5/10—Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller of coaxial type, e.g. of counter-rotative type
- B63H2005/106—Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller of coaxial type, e.g. of counter-rotative type with drive shafts of second or further propellers co-axially passing through hub of first propeller, e.g. counter-rotating tandem propellers with co-axial drive shafts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H23/00—Transmitting power from propulsion power plant to propulsive elements
- B63H23/32—Other parts
- B63H23/321—Bearings or seals specially adapted for propeller shafts
- B63H2023/323—Bearings for coaxial propeller shafts, e.g. for driving propellers of the counter-rotative type
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Sealing With Elastic Sealing Lips (AREA)
- Sealing Of Bearings (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分デフ〕
本発明は、二組反転プロペラを有する船舶の船尾管装置
に対する潤滑油の供給方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Definition] The present invention relates to a method for supplying lubricating oil to a stern tube device of a ship having two sets of reversing propellers.
従来から、この種船尾管装置の一例として第３図に示す
ものが知られている。Conventionally, the one shown in FIG. 3 has been known as an example of this type of stern tube device.
すなわち同図において、符号（３）は、船体（１）に貫
設した船尾管（２）の内側に軸受（４）（５）を介して
軸支された中空構造の外側プロペラ軸を示し、その内端
に連結した中空の中間軸（６）から伝わる動力を受けて
外端に固着した外側プロペラ（７）を回転させる。軸受
（４）（５）間の空間（８）内には該軸受（４）（５）
部を潤滑する油が注入されている。この油は、一般に、
船の吃水に相当する海水圧力より若干高い圧力に保持さ
れており、軸受（４）（５）の外側に設けたシール装置
（９）（１０）により船尾管（２）外への漏洩が防がれ
ている。前記外側プロペラ軸（３）の内側には軸受（１
２） （１３）を介して内側プロペラ軸（１１）が軸支
され、その内端に連結した中間軸（１４）から伝わる動
力によって外端に１．！、１．７した内側プロペラ（１
５）を前記外側プロペラ（７）と反対方向に回転させる
。軸受（１２）（１３）間の空間（１８）には。That is, in the same figure, the reference numeral (3) indicates a hollow outer propeller shaft that is supported via bearings (4) and (5) inside the stern tube (2) that extends through the hull (1). An outer propeller (7) fixed to the outer end is rotated by receiving power transmitted from a hollow intermediate shaft (6) connected to the inner end. The space (8) between the bearings (4) and (5) contains the bearings (4) and (5).
Oil is injected to lubricate the parts. This oil is generally
The pressure is maintained at a level slightly higher than the seawater pressure equivalent to the ship's stagnation, and sealing devices (9) and (10) installed on the outside of the bearings (4) and (5) prevent leakage to the outside of the stern tube (2). It's broken. A bearing (1) is installed inside the outer propeller shaft (3).
2) The inner propeller shaft (11) is pivotally supported via (13), and the power transmitted from the intermediate shaft (14) connected to the inner end causes the outer end to move 1. ! , 1.7 inner propeller (1
5) is rotated in the opposite direction to the outer propeller (7). In the space (18) between the bearings (12) and (13).
前記外側のＩＴ１滑油と略同圧になる止１滑油が注入さ
れ、軸受（＋２）（＋３）の外側に設けたシール装置（
１７）（１８）により該ｆｌｔｌ滑油の漏洩が防止され
ている。Stop 1 lubricant having approximately the same pressure as the IT1 lubricant on the outside is injected, and the sealing device (
17) (18) prevents the fltl oil from leaking.
二東反転プロペラを備えるこの船尾管装置は、現在、開
発途上にあり、今のところ一般商船として実用に供され
るまでには至っていないが、推進効率がよ〈°°省エネ
船°°として高く評価されており、近い将来一般に汀及
するものと予想される。This stern tube device, which is equipped with two east-rotating propellers, is currently under development and has not yet been put into practical use as a commercial ship, but it has high propulsion efficiency and is highly effective for energy-saving ships. It is highly evaluated and is expected to become widely available in the near future.
Ｌ記船尾管装置において、外側および内側のプロペラ軸
（３）（１１）は、それぞれ２個の軸受（４）（５）（
＋２）（１３）により支えられて回転するが、軸受（４
）（５，） （＋２）（１３）はいずれもプロペラ（７
）（＋５）の爪３７Ｈやプロペラ軸（３）（ＩＩ）の自
毛を支えるので、かなりの高負荷となり、 １ｌＦｌ滑
油の積極的な供給が不Ｕ（欠となる。またポ１滑油をシ
ールする内外の各シール装置（９）（ＩＱ）（＋７）（
１Ｂ）に対しても安定したシール性能を維持させるため
にはシール装置（９）（１０）（＋７）（１８）の内部
に給油することが絶対条件となるが、上記装置には外側
プロペラ軸（３）の内側に配される内側プロペラ軸（１
１）の軸受（＋２）（１３）およびシール装：！１（１
７）（１８）に潤滑油を円滑に供給する手段が確立され
ていない。In the L stern tube device, the outer and inner propeller shafts (3) (11) each have two bearings (4) (5) (
+2) It rotates supported by (13), but the bearing (4
)(5,) (+2)(13) are all propellers (7
) (+5) and the propeller shaft (3) (II), the load is quite high, and the active supply of 1lFl lubricating oil becomes insufficient. Internal and external sealing devices (9) (IQ) (+7) (
In order to maintain stable sealing performance even for 1B), it is an absolute requirement to supply oil inside the sealing devices (9), (10), (+7), and (18), but the above device does not have an outer propeller shaft. (3) The inner propeller shaft (1
1) Bearings (+2) (13) and seals:! 1 (1
7) A means to smoothly supply lubricating oil to (18) has not been established.
本発明は以上の点に鑑み、内側プロペラ軸の軸受やシー
ル装置に潤滑油を円滑に供給ｎ（能になる供給方法を提
供せんとするするもので、この目的を達成するため、二
重反転プロペラを有する船舶の船尾管装置の外軸の外周
に１個または複数個の潤滑油分配箱を配し、配管に連な
る該分配箱の油室と前記外軸に穿設した連通孔を介して
内側の軸受またはシール装置に潤滑油を供給することと
した。In view of the above points, the present invention aims to provide a supply method that enables lubricating oil to be smoothly supplied to the bearings and sealing devices of the inner propeller shaft. One or more lubricating oil distribution boxes are arranged around the outer circumference of the outer shaft of the stern tube device of a ship having a propeller, and the lubricating oil distribution box is connected to the piping through a communication hole drilled in the outer shaft of the oil chamber of the distribution box. It was decided to supply lubricating oil to the inner bearing or sealing device.
上記構成の潤滑油供給方法は、船体内に固定的に配設さ
れる供給配管から１回転駆動する外側プロペラ軸を通し
てその内側へ潤滑油を供給ｕｆ能になり、内側プロペラ
軸の軸受やシール装置へ常に適１１１の潤滑油を供給し
てその作動性および耐久性を向上させる。The lubricating oil supply method with the above configuration is capable of supplying lubricating oil to the inside of the outer propeller shaft that is driven once from the supply piping fixedly installed inside the hull, and the bearing and sealing device of the inner propeller shaft. The proper amount of lubricating oil is constantly supplied to the machine to improve its operability and durability.
つぎに本発明の詳細な説明する。 Next, the present invention will be explained in detail.
第１図に示すように、内側プロペラ軸（１１）の軸受（
＋２）（Ｉｔ）への給油は、タンク（１９）内に貯えた
潤滑油をポンプ（２０）により配管（２１ａ）を経て分
配箱（２２）に送給し、外側プロペラ軸（３）に穿設し
た給油孔（２３）を経て各軸受（１２）（１３）へ送り
込む。軸受（１２）（１３）を潤滑した油は外側プロペ
ラ軸（３）に穿設した排油孔（２４）から分配箱（２２
）内に回収され、配管（２１ｂ）を経てタンク（１９）
に戻される６前記ポンプ（２０）から送り出された油の
一部は、配管（２５ａ）を経て分配箱（２Ｂ）へ送給さ
れ、外側中１１１目１ｈ（６）に設けた給油孔（２７）
と配管（２５ｂ）を経てシール装ｆ’？（＋８）へ供給
される。シール装２！ （＋８）を潤滑した油は配管（
２５ｃ）と外側中間軸（６）に穿設した排油孔（２８）
を経て分配箱（２６）内に回収され、配管（２５ｄ）を
経てタンク（１９）に戻される。シール装置（１７）へ
の給油は、油を貯えた屯カタンク（２９）より配管（３
０）（３１）、分配箱（３２）および給油孔（３３）（
３４）を介して行なわれる。As shown in Figure 1, the bearing (
+2) To supply oil to (It), the lubricating oil stored in the tank (19) is sent to the distribution box (22) via the piping (21a) using the pump (20), and then the lubricating oil is supplied to the distribution box (22) through the outer propeller shaft (3). It is sent to each bearing (12) (13) through the provided oil supply hole (23). The oil that has lubricated the bearings (12) and (13) is drained from the distribution box (22) through the oil drain hole (24) drilled in the outer propeller shaft (3).
) is collected in the tank (19) via the pipe (21b).
6 A part of the oil sent out from the pump (20) is sent to the distribution box (2B) via the pipe (25a), and is returned to the oil supply hole (27 )
and the seal f'? via the piping (25b). (+8). Seal equipment 2! The oil that lubricates (+8) is the pipe (
25c) and an oil drain hole (28) drilled in the outer intermediate shaft (6)
It is collected in the distribution box (26) through the pipe (25d) and returned to the tank (19). The sealing device (17) is supplied with oil through the pipe (3) from the tank tank (29) that stores oil.
0) (31), distribution box (32) and oil supply hole (33) (
34).
前記分配箱（２２）は、第２図に拡大して示すように、
環状を呈し、外側プロペラ÷ｂ（３）の外周に該軸（３
）に対して摺動自在に嵌合され、船体（１）等の固定側
から延びる振止部材（３５）にｒ’ｉｌ看されて軸（３
）との共廻りおよび軸方向の移動が規制されている。円
周方向に２分割した該分配箱（２２）本体の内周面には
各各項状を呈する給油室（３Ｂ）と排油室（３７）が凹
設形成されており、給油室（３８）は配管（２１ａ）お
よび給油孔（２３）と、排油室６３７）は配管（２１ｂ
）および梗油孔（２４）とそれぞれ連通される。The distribution box (22), as shown enlarged in FIG.
It has an annular shape, and the shaft (3
) is slidably fitted to the shaft (3
) and movement in the axial direction is restricted. The distribution box (22) is divided into two parts in the circumferential direction, and an oil supply chamber (3B) and an oil drainage chamber (37) each having a shape are recessed on the inner circumferential surface of the main body of the distribution box (22). ) is the pipe (21a) and the oil supply hole (23), and the oil drain chamber 637) is the pipe (21b)
) and the oil hole (24), respectively.
前記本体の両端には軸シール（３Ｂ）（１９）、油切り
（４ｏ）（ａｔ）ならびにカバー（４２）（４３）が取
り付けられている。また該本体と外側プロペラ軸（３）
の間には軸受（４４）（４５）（４８）が介装されてい
る。Shaft seals (3B) (19), oil drains (4o) (at), and covers (42) (43) are attached to both ends of the main body. Also, the main body and the outer propeller shaft (3)
Bearings (44), (45), and (48) are interposed between them.
Ｊ二記構成の分配箱（２２）に対し、配管（２＋ａ）か
ら送られてきた１１７１ ｍ油は給油室（３６）と給油
孔（２３）を経て内側プロペラ軸（１１）の軸受（１２
）（＋３）へ供給され、排油孔（２４）と排油室（３７
）を経て配管（２１ｂ）から排出される。給油孔（２３
）と排油孔（２４）は外側プロペラ軸（３）の回転によ
り周方向の位置が変わるが、給油室（３６）と排油室（
３７）が環状に形成されているため連通が遮断されるこ
とはない、給油室（３６）と排油室（３７）の油のシー
ルは前記軸シール（３８）（３９）により行なうが、万
一、漏洩のあった場合はカバー（４２）（４３）の下部
に設けたドレン抜き（４７）（４８）から回収する。分
配箱（２２）の内面に設けた軸受（４４）（４５） （
４Ｅｌ）はプロペラ軸（１１）の重４１を支えるもので
はなく、単に分配箱（２２）の自重を支えるとともに給
油室（３Ｂ）と排油室（３７）の間の油の移動を防ＩＦ
する。該分配箱（２２）の図上右側に配した符号（２Ｇ
）の分配箱も同じ構成になる。また符号（３２）の分配
箱は、排油室（３７）を省略し、給油室（３８）に対す
る給油側の配管口を１箇所追加したものである。The 1171 m oil sent from the piping (2+a) to the distribution box (22) with the J2 configuration passes through the oil supply chamber (36) and the oil supply hole (23), and then reaches the bearing (12) of the inner propeller shaft (11).
) (+3), the oil drain hole (24) and the oil drain chamber (37
) and is discharged from the pipe (21b). Oil supply hole (23
) and the oil drain hole (24) change their circumferential positions depending on the rotation of the outer propeller shaft (3), but the oil supply chamber (36) and the oil drain hole (
37) is formed in an annular shape, so that the communication will not be cut off.The oil in the oil supply chamber (36) and the oil drain chamber (37) is sealed by the shaft seals (38) and (39). 1. If there is a leak, collect it from the drain holes (47) (48) provided at the bottom of the covers (42) (43). Bearings (44) (45) provided on the inner surface of the distribution box (22) (
4El) does not support the weight 41 of the propeller shaft (11), but merely supports the weight of the distribution box (22) and prevents oil movement between the oil supply chamber (3B) and the oil drain chamber (37).
do. The code (2G) placed on the right side of the diagram of the distribution box (22)
) distribution box has the same configuration. Further, the distribution box designated by reference numeral (32) omits the oil drain chamber (37) and has one piping port on the oil supply side to the oil supply chamber (38) added.
また本実施例において、外側プロペラ軸（３）の軸受（
４）（５）への給油は、タンク（４９）からポンプ（５
０）、配管（５１ａ）を経て船尾管（２）内へ供給され
、配管（５１ｂ）からタンク（４８）へ戻される。また
ポンプ（５０）から出た油の一部は配／ｌ？（５２ａ）
によりシール装置（１０）を潤滑し、配管（５２ｂ）を
経てタンク（４９）に戻される。In addition, in this embodiment, the bearing (
4) Refueling to (5) is carried out from the tank (49) to the pump (5).
0), is supplied into the stern tube (2) via the piping (51a), and is returned to the tank (48) from the piping (51b). Also, some of the oil that came out of the pump (50) was distributed/l? (52a)
lubricates the sealing device (10) and returns to the tank (49) via the piping (52b).
本発明船尾管への潤滑油供給方法は以上説、明したよう
に１回転駆動する外軸の外周にｉｔ＋滑油分配箱を配し
、該分配箱と外軸に穿設した連通孔を介して内袖の軸受
やシール装置へ潤滑油を供給するもので、二重反転プロ
ペラの難点のひとつであった内袖側への油の供給を円滑
かつ確実に行なうことができ、内側の軸受やシール装置
の作動性や耐久性を白玉させることができる。As explained above, the method for supplying lubricating oil to the stern tube of the present invention is to arrange an IT+ lubricating oil distribution box around the outer circumference of the outer shaft that is driven once, and to communicate through the communication hole drilled between the distribution box and the outer shaft. This system supplies lubricating oil to the inner sleeve bearings and sealing device, making it possible to smoothly and reliably supply oil to the inner sleeve side, which was one of the difficulties with counter-rotating propellers. The operability and durability of the sealing device can be improved.
第１図は本発明の実施に使用する船尾管装置の一例を示
す概略的な断面図、第２図は潤滑油分配箱の断面図、第
３図は従来の船尾管装置の一例を示すＮ略的な断面図で
ある。
（１）船体 （２）船尾管 （３）外側プロペラ軸
（４）（５）（１２）（＋３）（ａａ）（ａ５）（４ｅ
）軸受（８）（１４）中間軸 （７）外側プロペラ（
９）（１０）（１７）（１８）シール装置（１１）内側
プロペラ軸 （１５）内側プロペラ（１９）（４９）
タンク （２０）（５０）ポンプ（２１ａ） （２ｌ
ｂ） （２５ａ） （２５ｂ）（２５ｃ ） （２５ｄ
） （３０）（３１） （５１ａ）（５１ｂ）（５２
ａ）（５２ｂ）配管
（２２） （２Ｂ）（３２）潤滑油分配箱（２３） （
２７）（３３）（３４）給油孔 （２４）（２８）排
油孔（２９）重力タンク （３５）振止部材 （３
Ｂ）給油室（３７）排油室 （３８）（３９）軸シー
ル（４０）（４１）油ｐＪリ （４２）（４３）カ
バー（４７）（４８）ドレン抜き
特許出願人 イーグル工業株式会社
代理人 弁理士 野 木 陽 −第２図FIG. 1 is a schematic cross-sectional view showing an example of a stern tube device used in carrying out the present invention, FIG. 2 is a cross-sectional view of a lubricating oil distribution box, and FIG. 3 is a schematic cross-sectional view showing an example of a conventional stern tube device. It is a schematic cross-sectional view. (1) Hull (2) Stern tube (3) Outer propeller shaft (4) (5) (12) (+3) (aa) (a5) (4e
) Bearing (8) (14) Intermediate shaft (7) Outer propeller (
9) (10) (17) (18) Seal device (11) Inner propeller shaft (15) Inner propeller (19) (49)
Tank (20) (50) Pump (21a) (2l
b) (25a) (25b) (25c) (25d
) (30) (31) (51a) (51b) (52
a) (52b) Piping (22) (2B) (32) Lubricating oil distribution box (23) (
27) (33) (34) Oil supply hole (24) (28) Oil drain hole (29) Gravity tank (35) Steady stop member (3
B) Oil supply chamber (37) Oil drain chamber (38) (39) Shaft seal (40) (41) Oil pJ leak (42) (43) Cover (47) (48) Drain drain Patent applicant Eagle Industries Co., Ltd. agent Person Patent Attorney Yo Nogi - Figure 2
Claims (1)
周に１個または複数個の潤滑油分配箱を配し、配管に連
なる該分配箱の油室と前記外軸に穿設した連通孔を介し
て内側の軸受またはシール装置に潤滑油を供給すること
を特徴とする船尾管への潤滑油供給方法。One or more lubricating oil distribution boxes are arranged around the outer circumference of the outer shaft of a stern tube device of a ship having a counter-rotating propeller, and a communication hole is drilled in the oil chamber of the distribution box connected to the piping and the outer shaft. A method for supplying lubricating oil to a stern tube, characterized in that lubricating oil is supplied to an inner bearing or sealing device through the stern tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61023952A JPS62181998A (en) | 1986-02-07 | 1986-02-07 | Method for feeding lubricating oil to stern tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61023952A JPS62181998A (en) | 1986-02-07 | 1986-02-07 | Method for feeding lubricating oil to stern tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62181998A true JPS62181998A (en) | 1987-08-10 |
Family
ID=12124883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61023952A Pending JPS62181998A (en) | 1986-02-07 | 1986-02-07 | Method for feeding lubricating oil to stern tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62181998A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100836636B1 (en) | 2007-04-23 | 2008-06-10 | 주식회사 디.에스.케이 | Axle-bearing for oil distribution box of controllable pitch propeller system |
| WO2009087832A1 (en) * | 2008-01-09 | 2009-07-16 | Ihi Marine United Inc. | Contra-rotating propeller marine propulsion device |
| US8459950B2 (en) | 2008-01-23 | 2013-06-11 | Japan Marine United Corporation | Contra-rotating propeller unit, method for assembly thereof, method for transportation thereof, and method for mounting thereof on mother ship |
| US8585366B2 (en) | 2008-01-08 | 2013-11-19 | Japan Marine United Corporation | Contra-rotating propeller marine propulsion device |
| CN109484599A (en) * | 2018-12-18 | 2019-03-19 | 杭州前进齿轮箱集团股份有限公司 | A kind of forced feed lubrication type oil distributor for controllable pitch propeller |
-
1986
- 1986-02-07 JP JP61023952A patent/JPS62181998A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100836636B1 (en) | 2007-04-23 | 2008-06-10 | 주식회사 디.에스.케이 | Axle-bearing for oil distribution box of controllable pitch propeller system |
| US8585366B2 (en) | 2008-01-08 | 2013-11-19 | Japan Marine United Corporation | Contra-rotating propeller marine propulsion device |
| WO2009087832A1 (en) * | 2008-01-09 | 2009-07-16 | Ihi Marine United Inc. | Contra-rotating propeller marine propulsion device |
| JP2009161116A (en) * | 2008-01-09 | 2009-07-23 | Ihi Marine United Inc | Propulsion unit for contra-rotating propeller type ship |
| KR101255597B1 (en) | 2008-01-09 | 2013-04-16 | 재팬 마린 유나이티드 코포레이션 | Contra-rotating propeller marine propulsion device |
| US8641463B2 (en) | 2008-01-09 | 2014-02-04 | Japan Marine United Corporation | Contra-rotating propeller marine propulsion device |
| US8459950B2 (en) | 2008-01-23 | 2013-06-11 | Japan Marine United Corporation | Contra-rotating propeller unit, method for assembly thereof, method for transportation thereof, and method for mounting thereof on mother ship |
| CN109484599A (en) * | 2018-12-18 | 2019-03-19 | 杭州前进齿轮箱集团股份有限公司 | A kind of forced feed lubrication type oil distributor for controllable pitch propeller |
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