JP3165504B2 - Stern tube bearing structure of contra-rotating propeller mechanism - Google Patents
Stern tube bearing structure of contra-rotating propeller mechanismInfo
- Publication number
- JP3165504B2 JP3165504B2 JP12424992A JP12424992A JP3165504B2 JP 3165504 B2 JP3165504 B2 JP 3165504B2 JP 12424992 A JP12424992 A JP 12424992A JP 12424992 A JP12424992 A JP 12424992A JP 3165504 B2 JP3165504 B2 JP 3165504B2
- Authority
- JP
- Japan
- Prior art keywords
- outer shaft
- bearing
- shaft bearing
- circumferential groove
- oil
- 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.)
- Expired - Fee Related
Links
Classifications
-
- 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
- B63H23/36—Shaft tubes
-
- 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)
- Sliding-Contact Bearings (AREA)
- Support Of The Bearing (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、船舶の推進装置として
の二重反転プロペラ機構の船尾管軸受構造に関し、特に
その潤滑系の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stern tube bearing structure of a contra-rotating propeller mechanism as a propulsion device for a ship, and more particularly to an improvement in a lubrication system thereof.
【０００２】[0002]
【従来の技術】従来、船舶の推進装置として二重反転プ
ロペラ機構が知られており、その船尾管軸受構造として
図６に示したものが採用されている。2. Description of the Related Art Conventionally, a contra-rotating propeller mechanism is known as a marine vessel propulsion apparatus, and the stern tube bearing structure shown in FIG. 6 is employed.
【０００３】すなわち図６において、符号１は外軸を示
しており、この外軸１は中空状に形成されるとともに船
体18に取付けられた外軸軸受11に回転可能に支承され、
かつ後端部に前方プロペラ２が取付けられている。That is, in FIG. 6, reference numeral 1 denotes an outer shaft, which is formed in a hollow shape and rotatably supported by an outer shaft bearing 11 mounted on a hull 18.
The front propeller 2 is attached to the rear end.
【０００４】外軸１内に同芯的に内軸３が回転可能に配
設され、内軸３の後端部に後方プロペラ４が取付けられ
ている。内軸３は外軸１の内径側に設置された内軸軸受
７を介して外軸に回転可能に支承され、内軸３と外軸２
とは互いに反対方向に回転駆動されて二重反転プロペラ
機構を構成している。[0004] An inner shaft 3 is rotatably disposed concentrically within the outer shaft 1, and a rear propeller 4 is attached to a rear end of the inner shaft 3. The inner shaft 3 is rotatably supported by the outer shaft via an inner shaft bearing 7 installed on the inner diameter side of the outer shaft 1.
Are rotated in opposite directions to constitute a contra- rotating propeller mechanism.
【０００５】さらに内軸３の軸芯部に給油通路５が形成
されていて、給油通路５から供給された潤滑油が、複数
個の絞り６を介して内軸軸受７に向けて噴出し、静圧潤
滑作用により、内軸３を内軸軸受７に非接触に保つよう
に作用する。[0005] Further, an oil supply passage 5 is formed in the shaft core of the inner shaft 3, and lubricating oil supplied from the oil supply passage 5 is ejected toward the inner shaft bearing 7 through a plurality of throttles 6. the static pressure lubricating action, acts to keep the non-contact inner shaft 3 to the inner shaft bearing 7.
【０００６】図６中の符号８は内軸軸受７の表面保護材
として用いられているホワイトメタル、符号14は外軸シ
ール、符号15は内軸シール、符号16は内軸軸受の排油通
路、符号17は外軸軸受の排油通路をそれぞれ示してい
る。In FIG. 6, reference numeral 8 denotes white metal used as a surface protection material for the inner shaft bearing 7, reference numeral 14 denotes an outer shaft seal, reference numeral 15 denotes an inner shaft seal, and reference numeral 16 denotes an oil passage for the inner shaft bearing. Reference numeral 17 indicates an oil discharge passage of the outer shaft bearing.
【０００７】[0007]
【発明が解決しようとする課題】ところで、上述のよう
な従来の二重反転プロペラ機構の船尾管軸受構造には、
以下のような問題点がある。 (1) 内軸の軸芯部に給油通路が構成され、ここに油を満
たす必要から、いわゆるデッドボリュームが大きいた
め、比較的大きな油タンクが必要となる。 (2) 内軸内部に高圧油を保持するための給油装置を別途
設ける必要がある。 (3) 船舶の高出力化に対応して静圧軸受負荷能力を増大
させるためには、給油圧力を高める必要があるが、油の
噴出速度が大きくなるために内軸軸受表面に保護材とし
て用いられるホワイトメタルをエロージョンにより損傷
させる危険性が高くなる。The stern tube bearing structure of the conventional contra-rotating propeller mechanism as described above includes:
There are the following problems. (1) An oil supply passage is formed in the shaft portion of the inner shaft, and since the oil needs to be filled therein, a so-called dead volume is large, so a relatively large oil tank is required. (2) It is necessary to provide a separate lubrication device for holding high-pressure oil inside the inner shaft. (3) In order to increase the load capacity of the hydrostatic bearing in response to the increase in the output of the ship, it is necessary to increase the oil supply pressure. The risk of erosion of the used white metal is increased.
【０００８】本発明は、このような問題点の解決をはか
ろうとするもので、二重反転プロペラ機構の船尾管軸受
構造において、船体に取付けられた外軸軸受内に円周溝
を形成し、外軸にこの円周溝に相対する位置から内軸軸
受に至る給油通路を形成して、潤滑油を外軸軸受および
給油通路を経て内軸軸受に供給できるようにした、二重
反転プロペラ機構の船尾管軸受構造を提供することを目
的とする。The present invention is intended to solve such a problem. In a stern tube bearing structure of a contra-rotating propeller mechanism, a circumferential groove is formed in an outer shaft bearing mounted on a hull. A contra-rotating propeller in which an oil supply passage is formed in the outer shaft from a position opposite to the circumferential groove to the inner shaft bearing so that lubricating oil can be supplied to the inner shaft bearing via the outer shaft bearing and the oil supply passage. An object of the present invention is to provide a stern tube bearing structure of a mechanism.
【０００９】[0009]
【課題を解決するための手段】上述の目的を達成するた
め、本発明の二重反転プロペラ機構の船尾管軸受構造
は、後端部にプロペラを有し船体に取付けられた外軸軸
受に回転可能に支承される中空状の外軸と、同外軸の内
部に同芯的に配設されて同外軸の内部に取付けられた内
軸軸受に回転可能に支承されるとともに後端部にプロペ
ラを有しかつ上記外軸と反対方向へ回転駆動される内軸
とをそなえ、上記外軸軸受の内面に円周溝が形成される
とともに同円周溝に潤滑油供給管が接続され、上記外軸
の外周上で上記円周溝に相対する位置に開口部をもつ給
油通路が上記外軸の内部に形成され、上記内軸軸受の背
面に空所が形成され、上記外軸の外周上で上記空所に相
対する位置に上記給油通路の吐出開口が形成されてお
り、上記外軸軸受に排油通路が形成されるとともに、上
記円周溝に供給される潤滑油の圧力降下を起こさせて上
記外軸軸受に軸方向の油圧勾配を発生させるべく、上記
排油通路に連通する補助円周溝が、上記円周溝に隣接し
て上記外軸軸受の内面に設けられていることを特徴とし
ている。In order to achieve the above-mentioned object, a stern tube bearing structure of a contra-rotating propeller mechanism according to the present invention is provided with an outer shaft bearing having a propeller at a rear end and mounted on a hull. A hollow outer shaft that is supported so as to be rotatable, and an inner shaft bearing that is coaxially disposed inside the outer shaft and that is attached to the inside of the outer shaft so as to be rotatably supported and at the rear end. An inner shaft having a propeller and being driven to rotate in a direction opposite to the outer shaft, a circumferential groove is formed on the inner surface of the outer shaft bearing, and a lubricating oil supply pipe is connected to the circumferential groove, An oil supply passage having an opening at a position opposite to the circumferential groove on the outer periphery of the outer shaft is formed inside the outer shaft, a cavity is formed on a back surface of the inner shaft bearing, and an outer periphery of the outer shaft is formed. The discharge opening of the oil supply passage is formed at a position opposite to the empty space above .
As a result, an oil drain passage is formed in the outer shaft bearing,
The pressure drop of the lubricating oil supplied to the circumferential groove causes
In order to generate an axial hydraulic gradient in the external shaft bearing,
An auxiliary circumferential groove communicating with the oil drain passage is adjacent to the circumferential groove.
And is provided on the inner surface of the outer shaft bearing .
【００１０】[0010]
【作用】上述の本発明の二重反転プロペラ機構の船尾管
軸受構造では、外軸軸受の内部に形成された円周溝に供
給される高圧油は、その一部が外軸軸受自体の潤滑を行
ない、残りが外軸内に設けられた給油通路を通って外軸
軸受内径側に設置された内軸軸受に達し、ここから絞り
等を介して内軸に向けて噴出して、内軸と内軸軸受との
間を非接触に保つ作用を行なう。そして、外軸における
上記円周溝に供給された潤滑油の高圧力は、上記補助円
周溝により緩和されて、軸方向に油圧勾配が生じるよう
になるので、外軸軸受の軸受性能が安定化する。 In the above-described stern tube bearing structure of the contra-rotating propeller mechanism of the present invention, part of the high-pressure oil supplied to the circumferential groove formed inside the outer shaft bearing is lubricated by the outer shaft bearing itself. And the remainder passes through an oil supply passage provided in the outer shaft to reach the inner shaft bearing installed on the inner diameter side of the outer shaft bearing, from which it is squirted toward the inner shaft via a throttle or the like, and the inner shaft is And the inner shaft bearing are kept in non-contact. And in the outer shaft
The high pressure of the lubricating oil supplied to the circumferential groove is
It is mitigated by the circumferential groove, so that an oil pressure gradient occurs in the axial direction
Therefore, the bearing performance of the outer shaft bearing is stabilized.
【００１１】[0011]
【実施例】以下、図面により本発明の一実施例としての
二重反転プロペラ機構の船尾管軸受構造について説明す
ると、図１は側断面図、図２は図１のＡ−Ａ矢視断面
図、図３は図１のＢ−Ｂ矢視断面図、図４は図１のＣ−
Ｃ矢視断面図、図５は図１のＤ−Ｄ矢視断面図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS A stern tube bearing structure of a contra-rotating propeller mechanism according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side sectional view, and FIG. , FIG. 3 is a sectional view taken along the line BB of FIG. 1, and FIG.
FIG. 5 is a cross-sectional view taken along a line D-D in FIG. 1.
【００１２】なお図１乃至図５中、図６と同じ符号はほ
ぼ同一の部材を示している。1 to 5, the same reference numerals as those in FIG. 6 denote substantially the same members.
【００１３】この実施例の二重反転プロペラ機構も、後
端部に前方プロペラ２を取付けられた外軸１と、後端部
に後方プロペラ４を取付けられて外軸１と反対方向へ回
転駆動される内軸３とをそなえるとともに、外軸１を支
承する外軸軸受11が船体18に取付けられている。The contra-rotating propeller mechanism of this embodiment also has an outer shaft 1 having a front propeller 2 attached to a rear end thereof, and a rear propeller 4 attached to a rear end thereof, and is driven to rotate in a direction opposite to the outer shaft 1. An outer shaft bearing 11 for supporting the outer shaft 1 is mounted on the hull 18 while being provided with the inner shaft 3.
【００１４】外軸軸受11の内面に円周溝12が形成され、
この円周溝12に潤滑油の給油管13が接続されている。A circumferential groove 12 is formed on the inner surface of the outer shaft bearing 11,
An oil supply pipe 13 for lubricating oil is connected to the circumferential groove 12.
【００１５】外軸１の外周上で円周溝12に相対する位置
に開口部10aをもつ給油通路10が外軸１の内部に形成さ
れている。An oil supply passage 10 having an opening 10 a at a position on the outer periphery of the outer shaft 1 opposite to the circumferential groove 12 is formed inside the outer shaft 1.
【００１６】一方、外軸１の軸端部付近の内径側に内軸
軸受７が設置され、この内軸軸受７の背面に空所22が穿
設されており、この空所22と相対するように給油通路10
の吐出開口10bが開口している。On the other hand, an inner shaft bearing 7 is installed on the inner diameter side near the shaft end of the outer shaft 1, and a space 22 is formed in the back of the inner shaft bearing 7, and the space 22 is opposed to the space 22. Refueling passage 10
Discharge opening 10b is open.
【００１７】上述の構成において、潤滑油は船体18に設
けられた外軸軸受11の内面に形成された円周溝12に給油
管13を介して供給される。この潤滑油の一部は、外軸軸
受11の複数個の給油絞り20を通り、給油ポケット21（複
数個）を経て外軸１と外軸軸受11との隙間に供給され
る。残りの潤滑油は円周溝12から給油通路10の開口部10
aを介して外軸１内部の給油通路10に流入し、給油通路1
0を経て内軸軸受７まで導かれる。内軸軸受７では給油
絞り９（複数個）を介して内軸３と内軸軸受７との間の
軸受隙間へ至る。すなわち給油通路10からの潤滑油は、
内軸軸受７の背面の空所22に満たされ、給油絞り９を経
て、半径方向内向きに内軸３へ向けて供給される。この
実施例では５本の給油絞り９が設けられている。In the above-described configuration, the lubricating oil is supplied to the circumferential groove 12 formed on the inner surface of the outer shaft bearing 11 provided on the hull 18 via the oil supply pipe 13. A part of the lubricating oil passes through a plurality of oil supply throttles 20 of the outer shaft bearing 11 and is supplied to a gap between the outer shaft 1 and the outer shaft bearing 11 through a plurality of oil supply pockets 21. The remaining lubricating oil flows from the circumferential groove 12 to the opening 10
a into the oil supply passage 10 inside the outer shaft 1 through the
Through 0, it is guided to the inner shaft bearing 7. The inner shaft bearing 7 reaches a bearing gap between the inner shaft 3 and the inner shaft bearing 7 through the oil supply throttles 9 (plurality). That is, the lubricating oil from the oil supply passage 10
The space is filled in the space 22 on the rear surface of the inner shaft bearing 7, and is supplied radially inward to the inner shaft 3 through the oil supply throttle 9. In this embodiment, five oil supply throttles 9 are provided.
【００１８】内軸軸受７からは船尾側、船首側双方へ油
が流れるので船尾側へ流れた油を回収するため内軸軸受
７には排油通路16を設けて船首側と連結している。な
お、排油通路16はこの実施例の場合６本設けられてい
る。Since oil flows from the inner shaft bearing 7 to both the stern side and the bow side, an oil drain passage 16 is provided in the inner shaft bearing 7 so as to collect the oil flowing to the stern side and is connected to the bow side. . In this embodiment, six oil drain passages 16 are provided.
【００１９】このようにして、外軸軸受11を経由して内
軸軸受７への潤滑油の供給が行なわれるから、従来例に
みられたような内軸内に高圧油を充満しておくための大
きな空間を形成する必要がなく、また、内軸軸受７では
内軸３に向けて潤滑油が噴出されるため、潤滑油の圧力
を高くしてもホワイトメタル８のエロージョン損傷を回
避できる。In this manner, the lubricating oil is supplied to the inner shaft bearing 7 via the outer shaft bearing 11, so that the inner shaft is filled with high-pressure oil as in the conventional example. It is not necessary to form a large space for lubrication, and since lubricating oil is ejected toward the inner shaft 3 in the inner shaft bearing 7, erosion damage of the white metal 8 can be avoided even if the pressure of the lubricating oil is increased. .
【００２０】なお内軸軸受７の所要油量増に対しては給
油通路10を周方向に本数を増やすことにより、対処でき
る。The increase in the required oil amount of the inner shaft bearing 7 can be dealt with by increasing the number of oil supply passages 10 in the circumferential direction.
【００２１】また、この実施例では、外軸軸受11に形成
される排油通路17が、大型の場合を考慮して、下方に多
く配設されている。In this embodiment, a large number of oil drain passages 17 formed in the outer shaft bearing 11 are provided below in consideration of a large size.
【００２２】本実施例の場合、外軸軸受11の円周溝12に
供給される潤滑油の圧力が高いため、外軸軸受の有効な
軸受作用を阻害するおそれがある。その対策として、図
１，４に示すごとく、外軸軸受11に背面の排油通路17に
連通する補助円周溝19が、円周溝12に隣接して設けられ
ている。この補助円周溝19はここで潤滑油の圧力降下を
起こさせて外軸軸受に軸方向の油圧勾配を発生させ、外
軸軸受の軸受性能を安定させる作用を行なうものであ
る。なおこの補助円周溝19は上述のように排油通路17に
連結されていて、こうすることによりこの部分の圧力が
低く保たれることになる。In the case of this embodiment, since the pressure of the lubricating oil supplied to the circumferential groove 12 of the outer shaft bearing 11 is high, there is a possibility that the effective bearing action of the outer shaft bearing is hindered. As a countermeasure, as shown in FIG.
As shown in FIGS. 1 and 4, an auxiliary circumferential groove 19 communicating with the oil discharge passage 17 on the rear surface of the outer shaft bearing 11 is provided adjacent to the circumferential groove 12 . The auxiliary circumferential groove 19 serves to cause a pressure drop of the lubricating oil to generate an axial oil pressure gradient in the outer shaft bearing, thereby stabilizing the bearing performance of the outer shaft bearing. The auxiliary circumferential groove 19 is connected to the oil drain passage 17 as described above, so that the pressure in this portion is kept low.
【００２３】[0023]
【発明の効果】以上詳述したように、本発明の二重反転
プロペラ機構の船尾管軸受構造によれば次のような効果
ないし利点が得られる。 (1) 外軸軸受に設けられた円周溝を外軸内に形成された
給油通路で内軸軸受まで連通させ、この円周溝に高圧油
を供給することにより、外軸軸受と内軸軸受との両方に
潤滑油を供給することができるため、従来例における内
軸内に形成された高圧油充満用の空間を形成する必要が
なくなり、このため油タンクの容量を小さくでき、また
特別な給油装置を必要としないことにより、軸受構造を
コンパクトなものとすることができる。 (2) 内軸軸受側から内軸に向けて油を噴出させることに
より、軸受の高負荷能力に対応して給油圧力を増大させ
た際の軸受表面のホワイトメタル層のエロージョン損傷
を、回避できる。(3) 上記外軸軸受に排油通路が形成されて、同排油通路
に連通する補助円周溝が、上記円周溝に隣接するように
上記外軸軸受の内面に設けられるので、上記円周溝に供
給される高圧の潤滑油の軸方向に沿う油圧勾配を発生さ
せて、上記外軸軸受の軸受性能を安定させることができ
る。 As described above, according to the stern tube bearing structure of the contra-rotating propeller mechanism of the present invention, the following effects and advantages can be obtained. (1) The circumferential groove provided in the outer shaft bearing is communicated with the inner shaft bearing through an oil supply passage formed in the outer shaft, and high-pressure oil is supplied to the circumferential groove, so that the outer shaft bearing and the inner shaft are Since the lubricating oil can be supplied to both the bearing and the bearing, it is not necessary to form a space for filling the high pressure oil formed in the inner shaft in the conventional example, so that the capacity of the oil tank can be reduced, and Since a simple lubrication device is not required, the bearing structure can be made compact. (2) By squirting oil from the inner bearing side toward the inner shaft, it is possible to avoid erosion damage of the white metal layer on the bearing surface when the oil supply pressure is increased corresponding to the high load capacity of the bearing. . (3) An oil passage is formed in the outer shaft bearing, and the oil passage is
So that the auxiliary circumferential groove communicating with the
Since it is provided on the inner surface of the outer shaft bearing, it is
Generates a hydraulic gradient along the axial direction of the supplied high-pressure lubricating oil.
To stabilize the bearing performance of the outer shaft bearing.
You.
【図１】本発明の一実施例としての二重反転プロペラ機
構の船尾管軸受構造の側断面図。FIG. 1 is a side sectional view of a stern tube bearing structure of a contra-rotating propeller mechanism as one embodiment of the present invention.
【図２】図１のＡ−Ａ矢視断面図。FIG. 2 is a sectional view taken along the line AA of FIG. 1;
【図３】図１のＢ−Ｂ矢視断面図。FIG. 3 is a sectional view taken along the line BB of FIG. 1;
【図４】図１のＣ−Ｃ矢視断面図。FIG. 4 is a sectional view taken along the line CC of FIG. 1;
【図５】図１のＤ−Ｄ矢視断面図。FIG. 5 is a sectional view taken along the line DD of FIG. 1;
【図６】従来の二重反転プロペラ機構の船尾管軸受構造
の側断面図。FIG. 6 is a side sectional view of a stern tube bearing structure of a conventional contra-rotating propeller mechanism.
１ 外軸 ２ 前方プロペラ ３ 内軸 ４ 後方プロペラ ７ 内軸軸受 ８ ホワイトメタル ９ 給油絞り 10 給油通路 11 外軸軸受 12 円周溝 13 給油管 14 外軸シール 15 内軸シール 16, 17 排油通路 18 船体 19 補助円周溝 20 給油絞り DESCRIPTION OF SYMBOLS 1 Outer shaft 2 Front propeller 3 Inner shaft 4 Rear propeller 7 Inner shaft bearing 8 White metal 9 Oil supply throttle 10 Oil supply passage 11 Outer shaft bearing 12 Circular groove 13 Oil supply pipe 14 Outer shaft seal 15 Inner shaft seal 16, 17 Oil discharge passage 18 Hull 19 Auxiliary circumferential groove 20 Refueling throttle
フロントページの続き (56)参考文献 特開 平３−24321（ＪＰ，Ａ) 特開 平２−237895（ＪＰ，Ａ) 実開 平４−19917（ＪＰ，Ｕ) 実開 昭60−143902（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) F16C 17/00 - 17/26 F16C 32/00 - 33/28 B63H 5/10 B63H 23/36 Continuation of front page (56) References JP-A-3-24321 (JP, A) JP-A-2-237895 (JP, A) JP-A-4-19917 (JP, U) JP-A-60-143902 (JP) , U) (58) Fields investigated (Int. Cl. 7 , DB name) F16C 17/00-17/26 F16C 32/00-33/28 B63H 5/10 B63H 23/36
Claims (1)
れた外軸軸受に回転可能に支承される中空状の外軸と、
同外軸の内部に同芯的に配設されて同外軸の内部に取付
けられた内軸軸受に回転可能に支承されるとともに後端
部にプロペラを有しかつ上記外軸と反対方向へ回転駆動
される内軸とをそなえ、上記外軸軸受の内面に円周溝が
形成されるとともに同円周溝に潤滑油供給管が接続さ
れ、上記外軸の外周上で上記円周溝に相対する位置に開
口部をもつ給油通路が上記外軸の内部に形成され、上記
内軸軸受の背面に空所が形成され、上記外軸の外周上で
上記空所に相対する位置に上記給油通路の吐出開口が形
成されており、上記外軸軸受に排油通路が形成されると
ともに、上記円周溝に供給される潤滑油の圧力降下を起
こさせて上記外軸軸受に軸方向の油圧勾配を発生させる
べく、上記排油通路に連通する補助円周溝が、上記円周
溝に隣接して上記外軸軸受の内面に設けられていること
を特徴とする、二重反転プロペラ機構の船尾管軸受構
造。A hollow outer shaft rotatably supported by an outer shaft bearing having a propeller at a rear end portion and mounted on a hull;
The inner shaft is rotatably supported by an inner shaft bearing which is disposed concentrically inside the outer shaft and is mounted inside the outer shaft, has a propeller at a rear end portion, and extends in a direction opposite to the outer shaft. With the inner shaft being driven to rotate, a circumferential groove is formed on the inner surface of the outer shaft bearing, and a lubricating oil supply pipe is connected to the circumferential groove, and the circumferential groove is formed on the outer periphery of the outer shaft. An oil supply passage having an opening at an opposing position is formed inside the outer shaft, a cavity is formed on the back surface of the inner shaft bearing, and the oil supply passage is provided at a position on the outer periphery of the outer shaft opposite to the space. When the discharge opening of the passage is formed and the oil discharge passage is formed in the outer shaft bearing,
In both cases, the pressure drop of the lubricating oil supplied to the circumferential groove
This generates an axial hydraulic gradient in the outer shaft bearing
The auxiliary circumferential groove communicating with the oil drain passage is
A stern tube bearing structure for a contra-rotating propeller mechanism, which is provided on an inner surface of the outer shaft bearing adjacent to a groove .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12424992A JP3165504B2 (en) | 1992-04-17 | 1992-04-17 | Stern tube bearing structure of contra-rotating propeller mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12424992A JP3165504B2 (en) | 1992-04-17 | 1992-04-17 | Stern tube bearing structure of contra-rotating propeller mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05296247A JPH05296247A (en) | 1993-11-09 |
| JP3165504B2 true JP3165504B2 (en) | 2001-05-14 |
Family
ID=14880665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12424992A Expired - Fee Related JP3165504B2 (en) | 1992-04-17 | 1992-04-17 | Stern tube bearing structure of contra-rotating propeller mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3165504B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7390579B2 (en) | 2003-11-25 | 2008-06-24 | Magnequench, Inc. | Coating formulation and application of organic passivation layer onto iron-based rare earth powders |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4387402B2 (en) | 2006-12-22 | 2009-12-16 | 株式会社神戸製鋼所 | Bearing and liquid-cooled screw compressor |
| DK2703666T3 (en) * | 2012-08-27 | 2018-07-23 | Ge Renewable Tech | Rotary system for a wind turbine |
-
1992
- 1992-04-17 JP JP12424992A patent/JP3165504B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7390579B2 (en) | 2003-11-25 | 2008-06-24 | Magnequench, Inc. | Coating formulation and application of organic passivation layer onto iron-based rare earth powders |
| US8313801B2 (en) | 2003-11-25 | 2012-11-20 | Magnequench, Inc. | Coating formulation and application of organic passivation layer onto iron-based rare earth powders |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05296247A (en) | 1993-11-09 |
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