JPH0930496A - Bearing device for double reversing propeller shaft - Google Patents
Bearing device for double reversing propeller shaftInfo
- Publication number
- JPH0930496A JPH0930496A JP7201838A JP20183895A JPH0930496A JP H0930496 A JPH0930496 A JP H0930496A JP 7201838 A JP7201838 A JP 7201838A JP 20183895 A JP20183895 A JP 20183895A JP H0930496 A JPH0930496 A JP H0930496A
- Authority
- JP
- Japan
- Prior art keywords
- propeller shaft
- propeller
- shaft
- bearing
- rotating
- 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
- Sliding-Contact Bearings (AREA)
- Gear Transmission (AREA)
- General Details Of Gearings (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は船舶の推進性能を向
上させることができる二重反転プロペラを備えた船舶推
進装置に用いられる二重反転プロペラ軸の軸受装置に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contra-rotating propeller shaft bearing device for use in a marine propulsion device equipped with a contra-rotating propeller capable of improving the propulsion performance of a marine vessel.
【０００２】[0002]
【従来の技術】二重反転プロペラを備えた船舶推進装置
は、後端に前プロペラを取り付けた外側プロペラ軸と後
端に後プロペラを取り付けた内側プロペラ軸とを同心状
に配置して、主機関に連結されている垂直軸下端の傘歯
車に、外側プロペラ軸の前端部と内側プロペラ軸の前端
部に各々固定した傘歯車をそれぞれ噛合させて、主機関
からの動力により前後のプロペラを互いに反対方向に回
転させて船舶の推進を行わせるようにしてあるが、近
年、かかる二重反転プロペラを備えた船舶推進装置を水
平方向に旋回させることにより船舶の推進方向を変える
ことができるようにした、いわゆる全旋回式と称される
船舶推進装置が提案されている。今、一例として、全旋
回式とした二重反転プロペラ推進装置について示すと、
図２に概略を示す如く、船舶１の船尾部に垂直に配して
上端を軸受２により回転自在に支持させたストラット３
の下端にケーシング（プロペラポット）４を固定して、
該ケーシング４の内部に、中空の外側プロペラ軸５内に
内側プロペラ軸６を同心状に挿入してなる二重反転プロ
ペラ軸７を回転自在に収納し、且つ、上記外側プロペラ
軸５と内側プロペラ軸６の後端に各々前プロペラ８と後
プロペラ９を取り付けると共に、外側プロペラ軸５と内
側プロペラ軸６の前端に対向させて取り付けたはすば傘
歯車１０と１１を、上記ストラット３の内部に回転自在
に軸受支持された垂直軸１２の下端に取り付けたはすば
傘歯車１３に噛合させ、上記垂直軸１２の上端を船舶１
内に設けた駆動機構１４に連結して、主機関１５からの
動力を中間軸１６及び駆動機構１４を経て垂直軸１２に
伝達することにより、上記外側プロペラ軸５と内側プロ
ペラ軸６を介して前プロペラ８と後プロペラ９とを互い
に反対方向へ回転駆動させるようにしてあり、更に、ス
トラット３の上端部に固定したリングギヤ１７に、船体
側に固定された駆動装置１８の歯車１９を噛合させ、駆
動装置１８によりストラット３を回転させることにより
前後のプロペラ８，９が水平旋回させられるようにして
ある。2. Description of the Related Art A marine propulsion device equipped with a contra-rotating propeller has an outer propeller shaft having a front propeller attached to its rear end and an inner propeller shaft having a rear propeller attached to its rear end concentrically. The bevel gear at the lower end of the vertical shaft connected to the engine is meshed with the bevel gear fixed to the front end of the outer propeller shaft and the front end of the inner propeller shaft, respectively, and the front and rear propellers are mutually driven by the power from the main engine. Although the boat is propelled by rotating it in the opposite direction, in recent years, it is possible to change the propulsion direction of the boat by horizontally turning the boat propulsion device equipped with such a counter-rotating propeller. A so-called full swing type ship propulsion device has been proposed. Now, as an example, showing a full-turn type counter-rotating propeller propulsion device,
As shown schematically in FIG. 2, struts 3 are arranged vertically on the stern of the ship 1 and have upper ends rotatably supported by bearings 2.
Fix the casing (propeller pot) 4 at the lower end of
Inside the casing 4, a contra-rotating propeller shaft 7 formed by concentrically inserting an inner propeller shaft 6 into a hollow outer propeller shaft 5 is rotatably housed, and the outer propeller shaft 5 and the inner propeller are rotatably housed. The front propeller 8 and the rear propeller 9 are attached to the rear ends of the shafts 6, respectively, and the helical bevel gears 10 and 11 attached to the front ends of the outer propeller shaft 5 and the inner propeller shaft 6 so as to face each other are attached to the inside of the strut 3. Is engaged with a helical bevel gear 13 attached to the lower end of a vertical shaft 12 which is rotatably supported by the ship, and the upper end of the vertical shaft 12 is engaged with the ship 1.
By connecting the power from the main engine 15 to the vertical shaft 12 via the intermediate shaft 16 and the drive mechanism 14 by connecting to the drive mechanism 14 provided inside, through the outer propeller shaft 5 and the inner propeller shaft 6 described above. The front propeller 8 and the rear propeller 9 are rotationally driven in opposite directions, and the ring gear 17 fixed to the upper end of the strut 3 is meshed with the gear 19 of the drive device 18 fixed to the hull side. The front and rear propellers 8 and 9 can be horizontally swung by rotating the strut 3 by the drive device 18.
【０００３】上記のような構成としてある二重反転プロ
ペラを備えた船舶推進装置に用いられている従来の二重
反転プロペラ軸の軸受装置としては、図３に示す構成の
ものと、図４に示す構成のものがある。図３に示すもの
は、同心状に配置した外側プロペラ軸５の後端部の内面
と内側プロペラ軸６の外面との間の環状空間２０に二重
反転軸受２１を介在させ、且つ外側プロペラ軸５の前端
側と内側プロペラ軸６の前端部をそれぞれ軸受２３と２
４にてケーシング４に支持させた構成において、外側プ
ロペラ軸５の前端部内面と内側プロペラ軸６の外面との
間に二重反転軸受２２を設けて、外側プロペラ軸５を内
側プロペラ軸６に２つの二重反転軸受２１と２２とで保
持させるようにしたものである。図中、２５はケーシン
グ４と外側プロペラ軸５との間のシール装置、２６は外
側プロペラ軸５と内側プロペラ軸６との間の二重反転シ
ール装置を示す。A conventional counter-rotating propeller shaft bearing device used in a ship propulsion apparatus equipped with the counter-rotating propeller having the above-described structure has the structure shown in FIG. 3 and FIG. There is a configuration shown. In FIG. 3, a counter rotating bearing 21 is interposed in an annular space 20 between the inner surface of the rear end portion of the outer propeller shaft 5 and the outer surface of the inner propeller shaft 6 arranged concentrically, and the outer propeller shaft 5 5 and the front end portion of the inner propeller shaft 6 to the bearings 23 and 2 respectively.
4, the counterpropelling bearing 22 is provided between the inner surface of the front end portion of the outer propeller shaft 5 and the outer surface of the inner propeller shaft 6, so that the outer propeller shaft 5 is attached to the inner propeller shaft 6. The two counter rotating bearings 21 and 22 are used to hold the bearings. In the figure, 25 is a sealing device between the casing 4 and the outer propeller shaft 5, and 26 is a counter-rotating sealing device between the outer propeller shaft 5 and the inner propeller shaft 6.
【０００４】又、図４に示すものは、同心状に配置した
外側プロペラ軸５の後端部の内面と内側プロペラ軸６の
外面との間の環状空間２０に二重反転軸受２１を介在さ
せ、且つ外側プロペラ軸５の前端側と内側プロペラ軸６
の前端部をそれぞれ軸受２３と２４にてケーシング４に
支持させた構成において、外側プロペラ軸５の前端に取
り付けたはすば傘歯車１０の後側近傍に別の軸受２７を
設けて、該軸受２７をケーシング４の内部に固定支持さ
せ、外側プロペラ軸５の外周を２つの軸受２３と２７に
て回転自在に支持させるようにしたものである。なお、
図４において図３と同一なものには同一な符号が付して
ある。Further, in the structure shown in FIG. 4, a counter rotating bearing 21 is interposed in an annular space 20 between the inner surface of the rear end portion of the outer propeller shaft 5 and the outer surface of the inner propeller shaft 6 which are concentrically arranged. And the front end side of the outer propeller shaft 5 and the inner propeller shaft 6
In a configuration in which the front end portions of the above are supported by the casing 4 by bearings 23 and 24 respectively, another bearing 27 is provided near the rear side of the helical bevel gear 10 attached to the front end of the outer propeller shaft 5, 27 is fixedly supported inside the casing 4, and the outer periphery of the outer propeller shaft 5 is rotatably supported by two bearings 23 and 27. In addition,
4, the same components as those in FIG. 3 are designated by the same reference numerals.
【０００５】[0005]
【発明が解決しようとする課題】ところが、上記図３に
示す二重反転プロペラを備えた船舶推進装置に用いられ
れている従来の二重反転プロペラ軸の軸受装置の場合
は、外側プロペラ軸５の外周には中央付近にただ一つの
軸受２３が設けてあるのみであるため、外側プロペラ軸
５が内側プロペラ軸６に沿って傾斜することになって、
軸系の撓み振動は内側プロペラ軸６の曲げ剛性によって
支配されることになるが、内径プロペラ軸６は外側プロ
ペラ軸５と比べて径が細くて剛性が低く、しかも前プロ
ペラ８及び後プロペラ９の両方の質量も付加されること
から、回転駆動力に伴う軸系撓み振動の固有振動数が低
くなって使用回転域で共振現象を起こして船体や軸系が
損傷してしまう等の虞れがあり、更に、環状空間２０内
に配した前後の二重反転軸受２１，２２によって外側プ
ロペラ軸５と内側プロペラ軸６とを相互に保持させるよ
うにしてあるため、前後の二重反転軸受２１，２２を潤
滑させるための潤滑油が外側プロペラ軸５と内側プロペ
ラ軸６との間の前後の二重反転軸受２１と２２とで挟ま
れた範囲内に閉じ込められて後側の二重反転軸受２１に
新しい潤滑油が到達しにくくなり、劣化及び汚損した潤
滑油が滞留し易くなって軸受損傷の虞れがあり、加え
て、二重反転シール装置２６の隙間から海水が漏れ込ん
だ場合、後側の二重反転軸受２１周囲の潤滑油が汚損さ
れる虞れがある、という問題がある。However, in the case of the conventional counter-rotating propeller shaft bearing device used in the ship propulsion apparatus equipped with the counter-rotating propeller shown in FIG. Since only one bearing 23 is provided near the center on the outer circumference, the outer propeller shaft 5 is inclined along the inner propeller shaft 6,
The flexural vibration of the shaft system is governed by the bending rigidity of the inner propeller shaft 6, but the inner diameter propeller shaft 6 has a smaller diameter and lower rigidity than the outer propeller shaft 5, and the front propeller 8 and the rear propeller 9 are also small. Since both masses are added, the natural frequency of the flexural vibration of the shaft system due to the rotational driving force becomes low, which may cause a resonance phenomenon in the operating rotation range and damage the hull or shaft system. Further, since the front and rear counter rotating bearings 21 and 22 arranged in the annular space 20 hold the outer propeller shaft 5 and the inner propeller shaft 6 to each other, the front and rear counter rotating bearings 21 Lubricating oil for lubricating the rear and counter rotating shafts is confined within a range sandwiched between the front and rear counter rotating bearings 21 and 22 between the outer propeller shaft 5 and the inner propeller shaft 6, and the rear counter rotating bearings. 21 new lubricating oil arrives When the seawater leaks from the gap of the counter-rotating seal device 26, the deteriorated and contaminated lubricating oil is likely to stay, and the bearing may be damaged. 21 There is a problem that the surrounding lubricating oil may be contaminated.
【０００６】又、図４に示す二重反転プロペラ軸の軸受
装置の場合は、外側プロペラ軸５の外周を前後２個所の
軸受２３，２７を介してケーシング４に支持させるよう
にして、前プロペラ８の質量が内側プロペラ軸６に付加
されないようにし、且つ図３における前側の二重反転軸
受２２を廃止した構成としてあるため、図３に示すもの
における問題点は解消させられるが、２つの軸受２３と
２７が傘歯車１０の後側に設けられるために、ケーシン
グ４の内部には２つの軸受２３と２７との間に適当なス
パンｓを確保しなければならず、ケーシング４自身が長
大化してしまうという問題がある。Further, in the case of the bearing device of the contra-rotating propeller shaft shown in FIG. 4, the outer periphery of the outer propeller shaft 5 is supported by the casing 4 via the bearings 23 and 27 at the front and rear, so that the front propeller is supported. Since the mass of No. 8 is prevented from being added to the inner propeller shaft 6 and the counter rotating bearing 22 on the front side in FIG. 3 is abolished, the problem in that shown in FIG. Since 23 and 27 are provided on the rear side of the bevel gear 10, it is necessary to secure an appropriate span s between the two bearings 23 and 27 inside the casing 4, and the casing 4 itself becomes large. There is a problem that it will end up.
【０００７】そこで、本発明は、前プロペラの質量が内
側プロペラ軸に付加されないようにし、しかもケーシン
グの長大化を防止することができ、更に、外側プロペラ
軸と内側プロペラ軸との間の後側の二重反転軸受へ新し
い油が供給され易くなるようにした二重反転プロペラを
備えた船舶推進装置に用いられる二重反転プロペラ軸の
軸受装置を提供しようとするものである。Therefore, according to the present invention, the mass of the front propeller is prevented from being added to the inner propeller shaft, and further, the lengthening of the casing can be prevented. Furthermore, the rear side between the outer propeller shaft and the inner propeller shaft is prevented. Another object of the present invention is to provide a bearing device for a counter-rotating propeller shaft used in a ship propulsion device equipped with a counter-rotating propeller, which makes it easier to supply new oil to the counter-rotating bearing.
【０００８】[0008]
【課題を解決するための手段】本発明は、上記課題を解
決するために、後端に前プロペラを取り付けた中空の外
側プロペラ軸内へ後端に後プロペラを取り付けた内側プ
ロペラ軸を同心状に挿入して外側プロペラ軸の後端部内
面と内側プロペラ軸との間に軸受を介在させてなる二重
反転プロペラ軸の前端側をケーシング内に収納し、外側
プロペラ軸の中央付近と内側プロペラ軸の前端部をケー
シングに軸受を介して回転自在に支持させると共に、上
記外側プロペラ軸の前端部と内側プロペラ軸の前端部に
各々固定した傘歯車を、垂直軸の下端に固定した傘歯車
に噛合させ、垂直軸を経て伝えられる駆動力により外側
プロペラ軸と内側プロペラ軸を介して前プロペラと後プ
ロペラとを互いに反対方向へ回転駆動させるようにして
ある二重反転プロペラを備えた船舶推進装置における上
記外側プロペラ軸の前端部を、該外側プロペラ軸前端部
と内側プロペラ軸の前端部に各々固定した上記２つの傘
歯車同士の中間位置まで延長し、該延長した外側プロペ
ラ軸の前端部外側を、ケーシング内に固定した軸受にて
回転自在に支持させた構成とする。SUMMARY OF THE INVENTION In order to solve the above problems, the present invention concentrically arranges an inner propeller shaft having a rear propeller attached to a rear end into a hollow outer propeller shaft having a front propeller attached to a rear end. The front end side of the contra-rotating propeller shaft, which is formed by inserting a bearing between the inner surface of the rear end of the outer propeller shaft and the inner propeller shaft, is housed in the casing. The bevel gear fixed to the front end of the outer propeller shaft and the front end of the inner propeller shaft, respectively, is fixed to the bevel gear fixed to the lower end of the vertical shaft. The counter-rotating propellers are engaged with each other and the front propeller and the rear propeller are rotationally driven in opposite directions via the outer propeller shaft and the inner propeller shaft by the driving force transmitted through the vertical shaft. The front end portion of the outer propeller shaft in the marine vessel propulsion apparatus provided with a ra is extended to an intermediate position between the two bevel gears fixed respectively to the front end portion of the outer propeller shaft and the front end portion of the inner propeller shaft, and the extension is performed. The outside of the front end portion of the outer propeller shaft is rotatably supported by a bearing fixed in the casing.
【０００９】外側プロペラ軸の前端を外側プロペラ軸及
び内側プロペラ軸の前端に各々固定した２つの傘歯車同
士の中間位置まで延長し、外側プロペラ軸をケーシング
により延長部と中央付近の２個所で軸受を介して回転自
在に支持させるようにすると、外側プロペラ軸の自重や
後端に取り付けた前プロペラの荷重といったような外側
プロペラ軸に係る全ての荷重をケーシングによって受け
させることができるので、内側プロペラ軸は後端に取り
付けた後プロペラの荷重のみを保持すればよいことにな
るので、回転駆動に伴う軸系撓み振動の固有周波数を充
分に高くすることができる。又、外側プロペラ軸の内面
と内側プロペラ軸の外面との環状空間には後側の二重反
転軸受のみが設けてあるだけで前側の二重反転軸受を廃
止した構成としてあるので、環状空間が後側の二重反転
軸受まで連通されることになって後側の二重反転軸受に
新しい潤滑油を供給することができる。更に、外側プロ
ペラ軸前端の延長部に設けた軸受を、外側プロペラ軸の
前端部と内側プロペラ軸の前端部に固定されている傘歯
車同士の中間位置、すなわち、垂直軸下端の傘歯車の下
方の広い空スペースを有効利用して設けるようにしてあ
ることから、該軸受を設けたことに伴ってケーシングが
長大化されてしまうことを防止できる。The front end of the outer propeller shaft is extended to an intermediate position between two bevel gears fixed to the front ends of the outer propeller shaft and the inner propeller shaft, respectively, and the outer propeller shaft is supported by the casing at two positions near the extension and the center. If it is rotatably supported through the casing, the casing can receive all the loads related to the outer propeller shaft, such as the weight of the outer propeller shaft and the load of the front propeller attached to the rear end. Since the shaft needs to hold only the load of the propeller after being attached to the rear end, it is possible to sufficiently increase the natural frequency of the flexural vibration of the shaft system due to the rotational drive. Further, the annular space between the inner surface of the outer propeller shaft and the outer surface of the inner propeller shaft is provided with only the counter rotating bearing on the rear side, and the counter rotating bearing on the front side is eliminated. Since the rear counter rotating bearing is communicated with the rear counter rotating bearing, new lubricating oil can be supplied to the rear counter rotating bearing. Further, a bearing provided on the extension of the front end of the outer propeller shaft is located at an intermediate position between the bevel gears fixed to the front end of the outer propeller shaft and the front end of the inner propeller shaft, that is, below the bevel gear at the lower end of the vertical shaft. Since the large empty space is effectively used for the installation, it is possible to prevent the casing from being enlarged due to the installation of the bearing.
【００１０】[0010]
【発明の実施の形態】以下、本発明の実施の形態を図面
を参照して説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１１】図１は本発明の一実施の形態を示すもの
で、図２に示す如き二重反転プロペラを備えた全旋回式
の船舶推進装置の二重反転プロペラ軸の軸受装置として
適用した場合を示す。図３又は図４に示したものと同様
に船体の船尾部により上端を回転自在に軸受支持された
ストラット３の下端に固定したケーシング４（プロペラ
ポット）内に、中空の外側プロペラ軸５内へ内側プロペ
ラ軸６を同心状に挿入して外側プロペラ軸５の後端部内
面と内側プロペラ軸の外面との間に二重反転軸受２１を
介在させてなる二重反転プロペラ軸７の前端側を収納し
て、外側プロペラ軸５の前端側と内側プロペラ軸６の前
端部とをそれぞれケーシング４に軸受２３と２４を介し
て回転自在に支持させ、且つ外側プロペラ軸５の前端部
と内側プロペラ軸６の前端部に各々取り付けたはすば傘
歯車１０と１１を、上記ストラット３内にて軸受支持さ
れた垂直軸１２の下端に取り付けたはすば傘歯車１３と
噛合させて、船舶の主機関からの動力を上記垂直軸１２
を経て外側及び内側のプロペラ軸５，６に伝達させるよ
うにし、外側プロペラ軸５後端に取り付けた前プロペラ
８と内側プロペラ軸６の後端に取り付けた後プロペラ９
を互いに反対方向へ回転駆動させるようにしてなる構成
において、上記二重反転プロペラ軸７をなす外側プロペ
ラ軸５の前端を、該外側プロペラ軸５の前端部に固定し
たはすば傘歯車１０と上記内側プロペラ軸６の前端部に
固定したはすば傘歯車１１との中間位置まで所要長さ延
長して、該延長部５ａの外周を、２つのはすば傘歯車１
０と１１との中間位置に配した軸受２８を介してケーシ
ング４の内部により回転自在に支持させるようにする。FIG. 1 shows an embodiment of the present invention, and is applied as a bearing device of a counter-rotating propeller shaft of a full swing type ship propulsion device equipped with a counter-rotating propeller as shown in FIG. Indicates. Similar to that shown in FIG. 3 or 4, inside the casing 4 (propeller pot) fixed to the lower end of the strut 3 whose upper end is rotatably supported by the stern of the hull, into the hollow outer propeller shaft 5. The front end side of the counter-rotating propeller shaft 7 is formed by inserting the inner propeller shaft 6 concentrically and interposing the counter-rotating bearing 21 between the inner surface of the rear end portion of the outer propeller shaft 5 and the outer surface of the inner propeller shaft. The front end of the outer propeller shaft 5 and the front end of the inner propeller shaft 6 are rotatably supported by the casing 4 via bearings 23 and 24, respectively, and the front end of the outer propeller shaft 5 and the inner propeller shaft are housed. The helical bevel gears 10 and 11 each attached to the front end of 6 are meshed with the helical bevel gear 13 attached to the lower end of the vertical shaft 12 bearing-supported in the struts 3, and the Power from the engine Serial vertical axis 12
To the outer and inner propeller shafts 5 and 6, and the front propeller 8 attached to the rear end of the outer propeller shaft 5 and the rear propeller 9 attached to the rear end of the inner propeller shaft 6.
And a helical bevel gear 10 in which the front end of the outer propeller shaft 5 forming the counter-rotating propeller shaft 7 is fixed to the front end of the outer propeller shaft 5. The required length is extended to an intermediate position between the helical bevel gear 11 fixed to the front end portion of the inner propeller shaft 6, and the outer periphery of the extension portion 5a is divided into two helical bevel gears 1.
It is rotatably supported inside the casing 4 through a bearing 28 arranged at an intermediate position between 0 and 11.
【００１２】図中、図３又は図４と同一なものには同一
な符号が付してある。In the figure, the same components as those in FIG. 3 or 4 are designated by the same reference numerals.
【００１３】外側プロペラ軸５の前端を所要長さ延長し
て、該延長部５ａの外周を２つのはすば傘歯車１０と１
１との中間位置に配した軸受２８にてケーシング４に支
持させるようにすると、外側プロペラ軸５の自重や前プ
ロペラ８の質量といったような外側プロペラ軸５にかか
る全ての荷重は、該外側プロペラ軸５の外周を回転自在
に支持する２つの軸受２３と２８を介してケーシング４
で支持されることになり、内側プロペラ軸６には後端に
取り付けた後プロペラ９の荷重のみが付加されることに
なるので、回転駆動に伴う軸系撓み振動の固有周波数を
充分に高くすることができて使用回転域での共振現象に
よる振動のトラブルを未然に防止することができ、又、
外側プロペラ軸５前端の延長部５ａを支持する軸受２８
は、２つのはすば傘歯車１０と１１との中間位置、すな
わち、上記垂直軸１２の下端に取り付けたはすば傘歯車
１３の下方に形成される広い空間を利用して設置するよ
うしてあるため、該軸受２５をケーシング４の内部に効
率的に収納することができ、図４に示すもののように軸
受２８の設置に伴ってケーシング４を長大化させてしま
うようなこともない。更に、外側プロペラ軸５と内側プ
ロペラ軸６との間の環状空間２０の前側には、図３に示
す如き二重反転軸受２２を廃止しているため、前後の二
重反転軸受２１と２２によって狭まれた範囲内に潤滑油
が閉じ込められてしまうこともなく、後側の二重反転軸
受１９に新しい潤滑油を供給することができて潤滑油の
劣化及び汚損に起因する軸受損傷も防止することができ
る。The front end of the outer propeller shaft 5 is extended by a required length, and the outer periphery of the extension portion 5a is divided into two helical bevel gears 10 and 1.
When the casing 4 is supported by the bearing 28 disposed at an intermediate position with respect to 1, all the loads applied to the outer propeller shaft 5, such as the weight of the outer propeller shaft 5 and the mass of the front propeller 8, are not applied to the outer propeller. The casing 4 is provided with two bearings 23 and 28 that rotatably support the outer periphery of the shaft 5.
Since the inner propeller shaft 6 is supported only by the load of the rear propeller 9 attached to the rear end of the inner propeller shaft 6, the natural frequency of the flexural vibration of the shaft system accompanying the rotational drive is sufficiently increased. It is possible to prevent the trouble of vibration due to the resonance phenomenon in the used rotation range, and
Bearing 28 for supporting extension 5a at the front end of outer propeller shaft 5
Is to be installed in an intermediate position between the two helical bevel gears 10 and 11, that is, in a wide space formed below the helical bevel gear 13 attached to the lower end of the vertical shaft 12. Therefore, the bearing 25 can be efficiently housed inside the casing 4, and the casing 4 does not become large due to the installation of the bearing 28 as shown in FIG. Furthermore, since the counter-rotating bearing 22 as shown in FIG. 3 is omitted on the front side of the annular space 20 between the outer propeller shaft 5 and the inner propeller shaft 6, the front and rear counter-rotating bearings 21 and 22 are used. Lubricating oil is not trapped in the narrowed range, new lubricating oil can be supplied to the counter rotating bearing 19 on the rear side, and bearing damage due to deterioration and contamination of the lubricating oil is also prevented. be able to.
【００１４】なお、本発明は上記実施の形態のみに限定
されるものではなく、たとえば、上記実施の形態では全
旋回式の二重反転プロペラを備えた船舶推進装置の二重
反転プロペラ軸の軸受装置について例示したが、旋回機
構を有していない二重反転プロペラを備えた船舶推進装
置についても同様に採用できること、又、はすば傘歯車
を各所に取り付けるようにした場合を示したが、はすば
でない傘歯車を用いるようにしてもよく、その他本発明
の要旨を逸脱しない範囲内において種々変更を加え得る
ことは勿論である。The present invention is not limited to the above-described embodiment. For example, in the above-mentioned embodiment, the bearing of the contra-rotating propeller shaft of the ship propulsion device provided with the full-turn type counter-rotating propeller. Although the device has been exemplified, it is shown that the ship propulsion device having a contra-rotating propeller without a turning mechanism can be similarly adopted, and the case where the helical bevel gears are attached to various places, It is needless to say that a non-helical bevel gear may be used, and various changes may be made without departing from the scope of the present invention.
【００１５】[0015]
【発明の効果】以上述べた如く、本発明の二重反転プロ
ペラ軸の軸受装置によれば、同心状に配した外側プロペ
ラ軸と内側プロペラ軸とからなる二重反転プロペラ軸の
前端側をケーシング内に収納して各プロペラ軸の前端に
固定した傘歯車を垂直軸下端の傘歯車と噛合し、又、外
側プロペラ軸の後端に前プロペラを、又内側プロペラ軸
の後端に後プロペラをそれぞれ取り付け、垂直軸を経て
伝達される駆動力により外側及び内側プロペラ軸を介し
て前プロペラと後プロペラを互いに反対方向へ回転駆動
させるようにしてなる構成において、上記外側プロペラ
軸と内側プロペラとの環状空間の後側のみに二重反転軸
受を配置すると共に、上記外側プロペラ軸の前端を外側
及び内側プロペラ軸の各前端部に固定した傘歯車同士の
中間位置まで延長して、外側プロペラ軸の延長部及び中
央付近の２個所を軸受を介してケーシングに支持させる
ようにしてあるので、外側プロペラ軸に係る全ての荷重
は２つの軸受を介してケーシングにて支えられることに
なって軸系撓みの固有振動数を充分に大きくすることが
でき、使用回転域で共振現象が生じて船体や軸系が損傷
してしまうことを防止することができ、且つ外側プロペ
ラ軸前端の延長部を支持する軸受はケーシング内部の空
スペースを有効利用して設けるようにしてあることか
ら、該軸受を設けたことに伴ってケーシングが長大化し
てしまうことも防ぐことができ、又、外側プロペラ軸と
内側プロペラ軸との間の環状空間には後側の二重反転軸
受のみとしてあるため、後側の二重反転軸受へ新しい潤
滑油を供給することができ、最も重要な部品である二重
反転軸受の信頼性を向上させることができてライフサイ
クルを長くすることができる、という優れた効果を発揮
する。As described above, according to the bearing device for a counter-rotating propeller shaft of the present invention, the front end side of the counter-rotating propeller shaft composed of the outer propeller shaft and the inner propeller shaft that are concentrically arranged is the casing. The bevel gears housed inside and fixed to the front end of each propeller shaft mesh with the bevel gear at the lower end of the vertical shaft, and the front propeller is located at the rear end of the outer propeller shaft and the rear propeller is located at the rear end of the inner propeller shaft. In the configuration in which the front propeller and the rear propeller are rotationally driven in opposite directions via the outer and inner propeller shafts by the driving force transmitted through the respective vertical shafts, the outer propeller shaft and the inner propeller are A counter rotating bearing is arranged only on the rear side of the annular space, and the front end of the outer propeller shaft is extended to the intermediate position between the bevel gears that are fixed to the front ends of the outer and inner propeller shafts. Since the extension of the outer propeller shaft and the two places near the center are supported by the casing through bearings, all the load related to the outer propeller shaft must be supported by the casing through the two bearings. As a result, it is possible to sufficiently increase the natural frequency of flexure of the shaft system, prevent the occurrence of resonance phenomena in the operating rotation range and damage the hull and shaft system, and the front end of the outer propeller shaft. Since the bearing supporting the extended portion of the casing is provided by effectively utilizing the empty space inside the casing, it is possible to prevent the casing from becoming large due to the provision of the bearing, and The annular space between the outer propeller shaft and the inner propeller shaft has only the rear counter-rotating bearing in the annular space, so it is possible to supply new lubricating oil to the rear counter-rotating bearing. It is possible to lengthen the life cycle can improve the reliability of the contra-rotating bearing is a part, there is exhibited an excellent effect that.
【図１】本発明の二重反転プロペラ軸の軸受装置の一実
施の形態の概要を示す拡大図である。FIG. 1 is an enlarged view showing an outline of an embodiment of a bearing device for a counter-rotating propeller shaft according to the present invention.
【図２】二重反転プロペラを備えた船舶推進装置の一例
として全旋回式のものを示す全体図である。FIG. 2 is an overall view showing a full swing type as an example of a vessel propulsion apparatus equipped with a contra-rotating propeller.
【図３】図２で示した二重反転プロペラを備えた船舶推
進装置に用いられる従来の二重反転プロペラ軸の軸受装
置の一例の概略を示す拡大図である。FIG. 3 is an enlarged view showing an outline of an example of a bearing device for a conventional counter-rotating propeller shaft used in a ship propulsion apparatus including the counter-rotating propeller shown in FIG.
【図４】従来の二重反転プロペラ軸の軸受装置の他の例
を示す拡大図である。FIG. 4 is an enlarged view showing another example of a conventional bearing device for a counter-rotating propeller shaft.
４ ケーシング（プロペラポット） ５ 外側プロペラ軸 ５ａ 延長部 ６ 内側プロペラ軸 ７ 二重反転プロペラ軸 ８ 前プロペラ ９ 後プロペラ １０，１１ はすば傘歯車 １２ 垂直軸 １３ はすば傘歯車 ２０ 環状空間 ２１ 二重反転軸受 ２３，２４，２８ 軸受 4 casing (propeller pot) 5 outer propeller shaft 5a extension 6 inner propeller shaft 7 counter-rotating propeller shaft 8 front propeller 9 rear propeller 10, 11 helical bevel gear 12 vertical shaft 13 helical bevel gear 20 annular space 21 Counter rotating bearing 23, 24, 28 bearing
Claims (1)
側プロペラ軸内へ後端に後プロペラを取り付けた内側プ
ロペラ軸を同心状に挿入して外側プロペラ軸の後端部内
面と内側プロペラ軸との間に軸受を介在させてなる二重
反転プロペラ軸の前端側をケーシング内に収納し、外側
プロペラ軸の中央付近と内側プロペラ軸の前端部をケー
シングに軸受を介して回転自在に支持させると共に、上
記外側プロペラ軸の前端部と内側プロペラ軸の前端部に
各々固定した傘歯車を、垂直軸の下端に固定した傘歯車
に噛合させ、垂直軸を経て伝えられる駆動力により外側
プロペラ軸と内側プロペラ軸を介して前プロペラと後プ
ロペラとを互いに反対方向へ回転駆動させるようにして
ある二重反転プロペラを備えた船舶推進装置における上
記外側プロペラ軸の前端部を、該外側プロペラ軸前端部
と内側プロペラ軸の前端部に各々固定した上記２つの傘
歯車同士の中間位置まで延長し、該延長した外側プロペ
ラ軸の前端部外側を、ケーシング内に固定した軸受にて
回転自在に支持させた構成を有することを特徴とする二
重反転プロペラ軸の軸受装置。Claim: What is claimed is: 1. A hollow outer propeller shaft having a front propeller attached to its rear end, and an inner propeller shaft having a rear propeller attached to its rear end, inserted concentrically into the hollow outer propeller shaft, and a rear end inner surface of the outer propeller shaft and the inner propeller shaft. The front end side of the contra-rotating propeller shaft with a bearing interposed between is housed in the casing, and the vicinity of the center of the outer propeller shaft and the front end of the inner propeller shaft are rotatably supported by the casing via the bearing. Along with the bevel gear fixed to the front end of the outer propeller shaft and the front end of the inner propeller shaft, respectively, the bevel gear fixed to the lower end of the vertical shaft is meshed with the outer propeller shaft by the driving force transmitted through the vertical shaft. Of the outer propeller shaft in a ship propulsion device equipped with a contra-rotating propeller adapted to rotate the front propeller and the rear propeller in opposite directions via the inner propeller shaft. The front end portion is extended to an intermediate position between the two bevel gears fixed to the front end portion of the outer propeller shaft and the front end portion of the inner propeller shaft, respectively, and the front end outer portion of the extended outer propeller shaft is fixed in the casing. A bearing device for a contra-rotating propeller shaft, which is rotatably supported by a bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7201838A JPH0930496A (en) | 1995-07-17 | 1995-07-17 | Bearing device for double reversing propeller shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7201838A JPH0930496A (en) | 1995-07-17 | 1995-07-17 | Bearing device for double reversing propeller shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0930496A true JPH0930496A (en) | 1997-02-04 |
Family
ID=16447737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7201838A Pending JPH0930496A (en) | 1995-07-17 | 1995-07-17 | Bearing device for double reversing propeller shaft |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0930496A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012165720A1 (en) * | 2011-06-02 | 2012-12-06 | 삼성중공업 주식회사 | Ship propulsion device and ship having the same |
| WO2012173306A1 (en) * | 2011-06-15 | 2012-12-20 | 삼성중공업 주식회사 | Propulsion device for ship and ship having same |
| WO2012173307A1 (en) * | 2011-06-15 | 2012-12-20 | 삼성중공업 주식회사 | Propulsion device for ship and ship having same |
| KR101302987B1 (en) * | 2010-09-10 | 2013-09-03 | 삼성중공업 주식회사 | Variable pitch marine propeller |
| CN112429187A (en) * | 2020-12-10 | 2021-03-02 | 镇江同舟螺旋桨有限公司 | Energy-saving propeller for large carrying ship |
-
1995
- 1995-07-17 JP JP7201838A patent/JPH0930496A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101302987B1 (en) * | 2010-09-10 | 2013-09-03 | 삼성중공업 주식회사 | Variable pitch marine propeller |
| WO2012165720A1 (en) * | 2011-06-02 | 2012-12-06 | 삼성중공업 주식회사 | Ship propulsion device and ship having the same |
| CN103796914A (en) * | 2011-06-02 | 2014-05-14 | 三星重工业有限公司 | Ship propulsion device and ship having the same |
| US9017119B2 (en) | 2011-06-02 | 2015-04-28 | Samsung Heavy Ind. Co., Ltd. | Ship propulsion device and ship having the same |
| WO2012173306A1 (en) * | 2011-06-15 | 2012-12-20 | 삼성중공업 주식회사 | Propulsion device for ship and ship having same |
| WO2012173307A1 (en) * | 2011-06-15 | 2012-12-20 | 삼성중공업 주식회사 | Propulsion device for ship and ship having same |
| KR101380651B1 (en) * | 2011-06-15 | 2014-04-04 | 삼성중공업 주식회사 | Propulsion apparatus for ship, and ship having the same |
| CN103796915A (en) * | 2011-06-15 | 2014-05-14 | 三星重工业有限公司 | Propulsion device for ship and ship having same |
| CN103796916A (en) * | 2011-06-15 | 2014-05-14 | 三星重工业有限公司 | Propulsion device for ship and ship having same |
| EP2722269A4 (en) * | 2011-06-15 | 2016-01-13 | Samsung Heavy Ind | Propulsion device for ship and ship having same |
| US9694887B2 (en) | 2011-06-15 | 2017-07-04 | Samsung Heavy Ind. Co., Ltd. | Propulsion device for ship and ship having the same |
| CN112429187A (en) * | 2020-12-10 | 2021-03-02 | 镇江同舟螺旋桨有限公司 | Energy-saving propeller for large carrying ship |
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