JPH08230789A - Stern tube sealing equipment - Google Patents

Stern tube sealing equipment

Info

Publication number
JPH08230789A
JPH08230789A JP7072227A JP7222795A JPH08230789A JP H08230789 A JPH08230789 A JP H08230789A JP 7072227 A JP7072227 A JP 7072227A JP 7222795 A JP7222795 A JP 7222795A JP H08230789 A JPH08230789 A JP H08230789A
Authority
JP
Japan
Prior art keywords
propulsion shaft
cylindrical
bellows
seal
stern tube
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.)
Granted
Application number
JP7072227A
Other languages
Japanese (ja)
Other versions
JP2694516B2 (en
Inventor
Shigeru Kubono
茂 久保野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NIKKO KIZAI KK
Original Assignee
NIKKO KIZAI KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NIKKO KIZAI KK filed Critical NIKKO KIZAI KK
Priority to JP7072227A priority Critical patent/JP2694516B2/en
Publication of JPH08230789A publication Critical patent/JPH08230789A/en
Application granted granted Critical
Publication of JP2694516B2 publication Critical patent/JP2694516B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Diaphragms And Bellows (AREA)
  • Sealing Devices (AREA)

Abstract

PURPOSE: To make power transmission efficiency more excellent compared with a stern tube seal by the gland packing and more effectively prevent the water leakage from a seal into a ship during a large whirling of a propulsion shall compared with the stem tube seal by the conventional rubber bellows. CONSTITUTION: A rubber cylindrical bellows body 3 provided with a ring-shaped flange bellows part 3a on a rear part of the outer circumference is housed at the prescribed position in the longitudinal direction of a propulsion shaft 4 to tightly fix its fore part 3b to the circumferential surface of the propulsion shaft, and a seal ring 6 to be brought into tight contact with a seal surface 2a in the radial direction provided on the fore part of a stern tube 1 in the slidable manner is concentrically fixed to the rear end surface. A cylindrical holder body 7 which surrounds the circumferential surface of the cylindrical bellows body and where the circumferential edge of the flange-shaped bellows part is brought into internal contact is provided to fix its forward part 7a to the propulsion shaft 7a, and a spring 9 to press a rear part 3c of the cylindrical bellows body rearward is provided inward of the holder body 7.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、釣り船などのレジャボ
ートや漁船などの比較的小さな船の船尾管の前部に実施
される船尾管シール装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stern tube sealing device which is implemented in front of the stern tube of a relatively small boat such as a fishing boat or a leisure boat.

【0002】[0002]

【従来の技術】推進軸は船尾管を通じて船外へ貫通され
るが、船尾管と推進軸の間にはその半径方向の隙間が設
けられるため、この隙間を通じて海水が船内へ侵入しよ
うとするのであり、これを阻止するものとして従来より
船尾管の前部に船尾管シール装置が設けられている。
2. Description of the Related Art A propulsion shaft is penetrated to the outside of a ship through a stern pipe, but since a radial gap is provided between the stern pipe and the propulsion shaft, seawater tries to enter the inside of the ship through this gap. In order to prevent this, a stern tube sealing device is conventionally provided in the front part of the stern tube.

【0003】比較的小さな船の船尾管シール装置はグラ
ンドパッキンを推進軸の周面に密接させて水密を確保す
るか、或いは推進軸の周面を包囲するものとしたリング
状のゴムベローズを利用して水密を確保するようになさ
れている。
A stern tube sealing device for a relatively small ship uses a ring-shaped rubber bellows in which a gland packing is brought into close contact with the peripheral surface of the propulsion shaft to ensure watertightness or to surround the peripheral surface of the propulsion shaft. It is designed to ensure water tightness.

【0004】[0004]

【発明が解決しようとする課題】上記した従来の船尾管
シール装置において、グランドパッキンによるものでは
使用時間の経過により漏水が過度に多くなったり、グラ
ンドパッキンの摺接により推進軸が摩耗したり、或いは
グランドパッキンの摺接により大きな摩擦が生じて動力
の伝達効率が低下するなどの問題があり、またゴムベロ
ーズによるものではゴムの弾性力を主体として水密を保
持する構造となされているためゴムの劣化により漏水が
過度に多くなる性質を有し、しかも船尾管内の軸受が摩
耗するなどして推進軸の回転中の半径方向変位やその軸
線の撓み角変化が大きくなったとき水密の確保が困難と
なるなどの問題がある。
In the above-mentioned conventional stern tube sealing device, when the gland packing is used, excessive leakage of water occurs due to the passage of time, or the propulsion shaft is worn due to sliding contact of the gland packing, Alternatively, there is a problem that the sliding contact of the gland packing causes a large amount of friction to reduce the power transmission efficiency, and the rubber bellows has a structure in which the elastic force of the rubber is the main component to keep the watertightness. Water leakage is excessive due to deterioration, and it is difficult to ensure watertightness when the radial displacement of the propulsion shaft during rotation and the change in the bending angle of its axis become large due to wear of bearings in the stern tube. There are problems such as

【0005】本発明は上記した問題点を解消し得るもの
とした船尾管シール装置を提供することを目的とする。
An object of the present invention is to provide a stern tube sealing device which can solve the above problems.

【0006】[0006]

【課題を解決するための手段】上記目的を達成するた
め、本発明は外周囲の後部に輪状鍔形ベローズ部を具備
したゴム質円筒ベローズ体を推進軸の長手方向特定位置
に外嵌してその前部を推進軸の周面に密状に固定すると
共に後端面には船尾管の前部に設けたその半径方向のシ
ール面に摺動自在状態で密接されるシールリングを概ね
同心状に固定し、一方では前記円筒ベローズ体の周面を
包囲し且つ前記鍔形ベローズ部の周縁が内接するものと
した円筒ホルダ体を設けてこれの前部を推進軸に固定す
るほか、該ホルダ体の内方に前記円筒ベローズ体の後部
を後方へ押圧するためのスプリングを設けたことを特徴
とする。
In order to achieve the above object, the present invention has a rubber cylindrical bellows body having a ring-shaped brim-shaped bellows portion at the rear portion of its outer periphery, and is fitted onto a specific position in the longitudinal direction of a propulsion shaft. The front part is fixed to the peripheral surface of the propulsion shaft in a dense manner, and the rear end surface is provided with a seal ring which is slidably brought into close contact with the radial seal surface provided on the front part of the stern tube. A cylindrical holder body that is fixed and, on the one hand, surrounds the peripheral surface of the cylindrical bellows body and is inscribed at the peripheral edge of the collar-shaped bellows portion is provided, and the front portion of the cylindrical holder body is fixed to the propulsion shaft. A spring for pressing the rear portion of the cylindrical bellows body to the rear is provided inside.

【0007】[0007]

【作用】シールリングは自身の後端面をスプリングの伸
長力によりシール面に摺動変位自在かつ水密状に圧接さ
れる。この状態においてシール面、シールリング及びゴ
ム質円筒ベローズ体が船尾管と推進軸との間隙を封鎖し
た状態となる。
The seal ring has its rear end face slidably displaced and water-tightly pressed against the seal face by the extension force of the spring. In this state, the sealing surface, the seal ring, and the rubber cylindrical bellows block the gap between the stern tube and the propulsion shaft.

【0008】推進軸は前進回転時と後進回転時とでその
位置が特定寸法だけ前後へ変位するものとなるが、この
ような場合はゴム質円筒ベローズ体がスプリング力との
関連でその中心線方向へ伸縮し、シールリングとシール
面の密接を確保する。
The position of the propulsion shaft is displaced forward and backward by a specific dimension between forward rotation and reverse rotation. In such a case, the rubber cylindrical bellows body has its center line in relation to the spring force. It expands and contracts in the direction to ensure close contact between the seal ring and the seal surface.

【0009】また船尾管内の軸受が摩耗すると推進軸は
その回転中に半径方向へ大きく変位すると同時に自身の
軸線の撓み角度が大きく変動し不安定な振れ回り状態と
なるが、ゴム質円筒ベローズ体の周壁部が自身の中心線
方向へスプリング力との関連でユニバーサル的に伸縮変
形し、且つ輪状鍔形ベローズ部がその周縁を円筒ホルダ
体に支持されて自身の弾性によりゴム質円筒ベローズ体
の後部の不規則な半径方向変位に効果的に抵抗するた
め、シールリングはシール面に密接した状態を安定的に
保持されるものとなる。
Further, when the bearing in the stern tube is worn, the propulsion shaft is largely displaced in the radial direction during its rotation, and at the same time, the deflection angle of its own axis is largely changed to cause an unstable whirling state. Of the rubber cylindrical bellows body is elastically deformed in the direction of its centerline in a universal direction in relation to the spring force, and the ring-shaped brim bellows part is supported by the cylindrical holder body at its periphery. Effectively resisting the rear irregular radial displacement, the seal ring is stably held in close contact with the sealing surface.

【0010】さらに推進軸の回転中の摺接部はシールリ
ングとシール面の当接箇所のみとなって推進軸の摺接に
よる修理困難な摩耗が回避されるのであり、またこの摺
接部における摩擦力は従来のグランドパッキンによるも
のに較べて大幅に減少する。
Further, since the sliding contact portion of the propulsion shaft during rotation is only the contact portion between the seal ring and the seal surface, wear which is difficult to repair due to the sliding contact of the propulsion shaft is avoided, and the sliding contact portion is The frictional force is greatly reduced compared to the conventional gland packing.

【0011】[0011]

【実施例】図1は本発明装置に係り推進軸が前進側へ回
転するときの状態を示す縦断面図、図2は同装置に係り
推進軸が後進側へ回転するときの状態を示す縦断面図、
図3は図2のx−x部を示す断面図、図4は図2のx1
−x1部を示す断面図である。
1 is a longitudinal sectional view showing a state where a propulsion shaft rotates in a forward direction according to the device of the present invention, and FIG. 2 shows a longitudinal section showing a state in which the propulsion shaft rotates toward a reverse side according to the device. Floor plan,
3 is a cross-sectional view showing a section xx in FIG. 2, and FIG. 4 is a section x1 in FIG.
It is sectional drawing which shows -x1 part.

【0012】図において、1は船尾管、2は船尾管1の
前端面にボルト固定されたリングシートで、リングシー
ト2の前面は船尾管1の半径方向に沿った平坦なシール
面2aとなされている。このさい、リングシート2はり
ん青銅で形成するのがよく、またシール面2aはセラミ
ックで形成するのが耐摩耗性の観点から一層よい。
In the figure, 1 is a stern tube, 2 is a ring seat fixed to the front end surface of the stern tube 1 by a bolt, and the front surface of the ring seat 2 is a flat sealing surface 2a along the radial direction of the stern tube 1. ing. At this time, the ring sheet 2 is preferably made of phosphor bronze, and the sealing surface 2a is more preferably made of ceramic from the viewpoint of wear resistance.

【0013】3はゴム(NBR)や適当な合成樹脂など
で一体状に形成したゴム質円筒ベローズ体で外周囲の後
端寄り箇所に輪状鍔形ベローズ部3aを具備したものと
なしてあり、その装着にさいしては船尾管1に内挿され
た推進軸4の長手方向特定位置に外嵌してその前部3b
を推進軸4の周面に密接させると共に前部3b外周面の
溝内にスプリング5を嵌着し、前部3bが固定された状
態となす。
Reference numeral 3 denotes a rubber cylindrical bellows body integrally formed of rubber (NBR) or a suitable synthetic resin, and is provided with a ring-shaped brim-shaped bellows portion 3a near the rear end of the outer periphery. At the time of its mounting, the front portion 3b is fitted to the propulsion shaft 4 inserted in the stern tube 1 at a specific position in the longitudinal direction.
Is closely contacted with the peripheral surface of the propulsion shaft 4 and the spring 5 is fitted in the groove on the outer peripheral surface of the front portion 3b so that the front portion 3b is fixed.

【0014】6は四弗化樹脂又は、フェノール樹脂にケ
ブラを加えたものなどを材料としたシールリングで、前
端部6aは前記円筒ベローズ体3の後端面にこれと同心
状に埋設し、後端部6bは前記シール面2aに密状に当
接されるものとなすのであり、その装着のさいは図3に
示すように後端部6aの二箇所に切欠kを設け、この切
欠kに前記円筒ベローズ体3の一部を食い込ませ、シー
ルリング6が円筒ベローズ体3内で位置ずれしないよう
にしてある。
Reference numeral 6 is a seal ring made of a material such as tetrafluororesin or phenol resin to which Kevlar is added. The front end portion 6a is buried concentrically with the rear end surface of the cylindrical bellows body 3 and The end portion 6b is to be brought into close contact with the sealing surface 2a. When mounting the end portion 6b, two notches k are provided on the rear end portion 6a as shown in FIG. A part of the cylindrical bellows body 3 is bited so that the seal ring 6 is not displaced in the cylindrical bellows body 3.

【0015】7は金属など比較的硬質の材料で形成した
円筒ホルダ体で、前記円筒ベローズ体3の周面全体を包
囲し且つ前記鍔形ベローズ部3aの周縁が内接するよう
になしてあり、その装着にさいしては前部7aの軸孔に
推進軸4を内挿すると共に前部7a肉厚部に螺着された
セットボルト8を介して推進軸4に固定する。このさい
セットボルト8は前部7aの周囲に対称状に配置するの
がよい。
Reference numeral 7 denotes a cylindrical holder body made of a relatively hard material such as metal, which surrounds the entire peripheral surface of the cylindrical bellows body 3 and inscribes the peripheral edge of the flange-shaped bellows portion 3a. At the time of mounting, the propulsion shaft 4 is inserted into the shaft hole of the front portion 7a and fixed to the propulsion shaft 4 via the set bolt 8 screwed to the thick portion of the front portion 7a. The setting bolts 8 are preferably arranged symmetrically around the front portion 7a.

【0016】しかして、円筒ベローズ体3及び円筒ホル
ダ体7は推進軸4に強固かつ一体状に固定された状態と
なすのであり、このため具体的には円筒ベローズ体3の
前端部の外周面に図4に示すように複数の切欠k1を設
け、一方では円筒ホルダ体7の前部7aの軸孔の後端に
形成した嵌合孔mの内周面に前記切欠k1に対応した突
部m1を設け、この突部m1と切欠k1が係合するよう
に円筒ベローズ体3の前端部を嵌合孔mに嵌着してあ
る。
Therefore, the cylindrical bellows body 3 and the cylindrical holder body 7 are firmly and integrally fixed to the propulsion shaft 4. Therefore, specifically, the outer peripheral surface of the front end portion of the cylindrical bellows body 3 is formed. 4, a plurality of notches k1 are provided, and on the other hand, on the inner peripheral surface of the fitting hole m formed at the rear end of the shaft hole of the front portion 7a of the cylindrical holder body 7, a protrusion corresponding to the notch k1 is formed. m1 is provided, and the front end of the cylindrical bellows body 3 is fitted in the fitting hole m so that the protrusion m1 and the notch k1 are engaged with each other.

【0017】9は円筒ベローズ体3の後部3cを後方へ
押圧するためのスプリングで、円筒ホルダ体7の内方で
円筒ベローズ体3の周面に外嵌させると共に、前端9a
は円筒ホルダ体7の前部7a内面に当接させ、後端9b
は鍔形ベローズ部3aの半径方向内方寄り位置に当接さ
せてある。このさい、スプリング9の各端部は鉤状に屈
曲してそれぞれの当接した部位に係止孔を設けてこれに
係止させるのがよい。
Reference numeral 9 denotes a spring for pressing the rear portion 3c of the cylindrical bellows body 3 rearward. The spring 9 is fitted onto the peripheral surface of the cylindrical bellows body 3 inside the cylindrical holder body 7 and has a front end 9a.
Is brought into contact with the inner surface of the front portion 7a of the cylindrical holder body 7, and the rear end 9b
Is brought into contact with a position radially inward of the collar-shaped bellows portion 3a. At this time, it is preferable that each end portion of the spring 9 is bent in a hook shape and a locking hole is provided at each abutting portion so as to be locked in the locking hole.

【0018】上記の如く構成した本発明装置の使用例及
びその作動を説明する。本装置を推進軸4に組み付ける
さいは円筒ホルダ体7と円筒ベローズ体3で囲まれた環
状密閉空間にはグリースを充填するようになす。
An example of use and operation of the apparatus of the present invention constructed as above will be described. When the present device is assembled to the propulsion shaft 4, the annular closed space surrounded by the cylindrical holder body 7 and the cylindrical bellows body 3 is filled with grease.

【0019】推進軸4は前進側へ回転されると、その後
端に固定されたプロペラpに押されて軸線方向の遊動間
隙に応じた寸法だけ前方へ移動した状態となる。
When the propelling shaft 4 is rotated forward, it is pushed by the propeller p fixed to the rear end of the propelling shaft 4 and moved forward by a dimension corresponding to the loose clearance in the axial direction.

【0020】このため、推進軸4の側に装着されたシー
ルリング6の後端面はシール面2aから離れる傾向とな
るが、円筒ベローズ体3の後部3cが自身の弾力とスプ
リング9の弾力により後方へ押されているため、鍔形ベ
ローズ部3aの周縁が円筒ホルダ体7の内面上を後方へ
摺動するに伴って同後部3cは後方へ変位し、シールリ
ング6を依然としてシール面3aに適当力で押圧した状
態となる。
For this reason, the rear end surface of the seal ring 6 mounted on the side of the propulsion shaft 4 tends to separate from the seal surface 2a, but the rear portion 3c of the cylindrical bellows body 3 moves backward due to its own elasticity and the elasticity of the spring 9. Since the outer periphery of the collar-shaped bellows portion 3a slides rearward on the inner surface of the cylindrical holder body 7, the rear portion 3c is displaced rearward, and the seal ring 6 is still suitable for the sealing surface 3a. It is pressed by force.

【0021】これにより、シールリング6はシール面2
aに密状に当接すると共にシール面2a上を推進軸4廻
りへ摺動変位されるものとなるのであり、このため船尾
管1の軸受間隙を通じてシールリング6及び円筒ベロー
ズ体3の内方へ侵入した海水が推進軸4の回転中にシー
ルリング6及びシール面2aの当接箇所を通じて船内へ
過度に漏洩することは阻止されるのであり、また海水は
円筒ベローズ体3の前部bにも達するが、これの前部3
bは推進軸4の周面と密状に当接しているから、この当
接箇所から漏洩することもない。
As a result, the seal ring 6 has the seal surface 2
It comes into close contact with a and is slidably displaced around the propulsion shaft 4 on the seal surface 2a. Therefore, the seal ring 6 and the cylindrical bellows body 3 are inwardly moved through the bearing gap of the stern tube 1. The invading seawater is prevented from excessively leaking into the ship through the contact points of the seal ring 6 and the seal surface 2a during the rotation of the propulsion shaft 4, and the seawater is also absorbed in the front part b of the cylindrical bellows body 3. Reach, but the front 3 of this
Since b is in close contact with the peripheral surface of the propulsion shaft 4, it does not leak from this contact portion.

【0022】船尾管1内の軸受1aが大きく摩耗するな
どすると、推進軸4はその半径方向へ大きく変位すると
同時にその軸線の撓み角が種々に変化して不規則な振れ
回りを生じるようになるのであり、このようになると、
何等の対策もなきときはシールリング6の位置が不安定
となってシール面2aとの密接が損なわれる傾向とな
る。しかし、本装置においては円筒ベローズ体3の周壁
がその中心線方向へ自在に伸縮すると同時に鍔形ベロー
ズ部3aが撓み且つその周縁が円筒ホルダ体7の内面上
を滑るため、シールリング6は推進軸4の任意な前後移
動及び撓み角に応ずるように変位し、また円筒ベローズ
体3の後部3cは鍔形ベローズ部3aを介して円筒ホル
ダ体7に支持され、その半径方向の過度な変位を効果的
に制限される。かくしてシールリング6は適当位置に安
定的に保持されてシール面2aに密状に当接され過度な
漏水を確実に阻止するものとなる。
When the bearing 1a in the stern tube 1 is greatly worn, the propulsion shaft 4 is largely displaced in the radial direction, and at the same time, the bending angle of the axis line is variously changed to cause irregular whirling. And when it comes to this,
If no measures are taken, the position of the seal ring 6 becomes unstable, and the close contact with the seal surface 2a tends to be lost. However, in this device, the peripheral wall of the cylindrical bellows body 3 freely expands and contracts in the direction of the center line thereof, and at the same time, the collar-shaped bellows portion 3a bends and its peripheral edge slides on the inner surface of the cylindrical holder body 7, so that the seal ring 6 is propelled. The shaft 4 is displaced so as to respond to an arbitrary front-back movement and a bending angle, and the rear portion 3c of the cylindrical bellows body 3 is supported by the cylindrical holder body 7 via the collar-shaped bellows portion 3a to prevent excessive displacement in the radial direction. Effectively limited. Thus, the seal ring 6 is stably held at an appropriate position and closely contacts the seal surface 2a to reliably prevent excessive water leakage.

【0023】円筒ベローズ体3の回転中、不注意などで
これに他物が接近しても円筒ホルダ体7は他物が円筒ベ
ローズ体3に直接に接触することを阻止して円筒ベロー
ズ体3の損傷を未然に防止する。
While the cylindrical bellows body 3 is rotating, even if another object approaches the cylindrical bellows body 3 due to carelessness, the cylindrical holder body 7 prevents the other object from directly contacting the cylindrical bellows body 3 and the cylindrical bellows body 3 Prevent damage to the equipment.

【0024】推進軸4が後進側へ回転されると、推進軸
4はプロペラpに引かれて遊動間隙に応じた寸法だけ後
方へ移動される。
When the propulsion shaft 4 is rotated in the reverse direction, the propulsion shaft 4 is pulled by the propeller p and moved backward by a dimension corresponding to the loose clearance.

【0025】このさいは推進軸4の側に装着されたシー
ルリング6の後端面がシール面2aに過度に押しつけら
れる傾向となるが、円筒ベローズ体3が自身の弾性とス
プリング9の圧縮変形により短縮可能であり、また鍔形
ベローズ部3aの周縁が円筒ホルダ体7の内面上を前方
へ摺動するため、同ベローズ体3の後部3cはシールリ
ング6をシール面2aに押しつけた状態を維持する。
In this case, the rear end surface of the seal ring 6 mounted on the side of the propulsion shaft 4 tends to be excessively pressed against the seal surface 2a, but the cylindrical bellows body 3 is compressed by the elasticity of itself and the spring 9. Since the periphery of the collar-shaped bellows portion 3a slides forward on the inner surface of the cylindrical holder body 7, the rear portion 3c of the bellows body 3 maintains the state in which the seal ring 6 is pressed against the sealing surface 2a. To do.

【0026】かくしてシールリング6はシール面2aに
適当圧で当接されると同時にシール面2a上を推進軸4
廻りへ円滑に摺動変位されるものとなるのであり、これ
により海水が船内へ過度に漏洩することは前述同様に阻
止されると共にシールリング6などの過度な摩擦や消耗
も防止される。
Thus, the seal ring 6 is brought into contact with the seal surface 2a with an appropriate pressure, and at the same time, the propulsion shaft 4 moves on the seal surface 2a.
Since it is smoothly slidably displaced around, excessive leakage of seawater into the ship is prevented as in the above, and excessive friction and wear of the seal ring 6 are prevented.

【0027】推進軸4が前進から後進、或いはこの逆へ
切り換えられたとき一時的に、推進軸4は不規則で激し
い振れ回りを生じるが、このさいにも船尾管1の軸受1
aが大きく摩耗したときの作用に準じて各部は的確に作
動し、シールリング6は常にシール面2aに適当圧で密
状に当接した状態となり、やはり海水の船内への過度な
漏洩は阻止される。
When the propulsion shaft 4 is switched from the forward drive to the reverse drive or vice versa, the propulsion shaft 4 temporarily causes irregular and violent whirling. In this case, the bearing 1 of the stern tube 1 is also generated.
Each part operates properly according to the action when a is greatly worn, and the seal ring 6 is always in close contact with the seal surface 2a at an appropriate pressure, which also prevents excessive leakage of seawater into the ship. To be done.

【0028】なおシールリング6の後端面が摩耗などし
たときは円筒ベローズ体3と一緒に交換する。
When the rear end surface of the seal ring 6 is worn, it is replaced together with the cylindrical bellows body 3.

【0029】[0029]

【発明の効果】上記の如く構成した本発明によれば、シ
ールリングとシール面を連係させて漏水を阻止するもの
であるため、推進軸自体が摩耗することはなく、また従
来のグランドパッキンによるものに較べると、時間の経
過による漏水の増大が生じ難くなると共に推進軸の回転
摩擦抵抗が小さくなって動力伝達効率が改善されるので
あり、また船尾管内の軸受の摩耗などにより推進軸が大
きく振れ回るようなことが生じても、円筒ベローズ体の
中心線方向の自在な伸縮、スプリングの弾性力及び、円
筒ホルダ体と鍔形ベローズ部とによるそれらの半径方向
の支持力などによりシールリングをシール面に常に適当
圧で密状に当接させることができ、したがってこの当接
箇所を通じて船外の水が船内へ過度に漏洩することは確
実に阻止されるものとなるのであり、さらには円筒ホル
ダ体が円筒ベローズ体に他物が直接接触することを阻止
して同ベローズ体の損傷を防止するものとなる。
According to the present invention constructed as described above, since the seal ring and the seal surface are linked to each other to prevent water leakage, the propulsion shaft itself is not worn, and the conventional gland packing is used. Compared to the above, the increase in water leakage is less likely to occur over time, the rotational friction resistance of the propulsion shaft is reduced, and the power transmission efficiency is improved, and the propulsion shaft is enlarged due to wear of bearings in the stern tube. Even if it shakes around, the seal ring can be expanded and contracted in the center line direction of the cylindrical bellows body, the elastic force of the spring, and the radial support force between the cylindrical holder body and the flange-shaped bellows. The seal surface can always be brought into close contact with the seal surface at an appropriate pressure. Therefore, excessive leakage of water outside the ship into the inside of the ship through this contact point can be reliably prevented. And it is become, more it becomes the cylindrical holder body to prevent damage of the blocking to the bellows body that another object in the cylindrical bellows member is in direct contact.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明装置に係り、推進軸が前進側へ回転する
ときの状態を示す縦断面図である。
FIG. 1 is a vertical cross-sectional view showing a state when a propulsion shaft rotates toward a forward side according to the device of the present invention.

【図2】本発明装置に係り、推進軸が後進側へ回転する
ときの状態を示す縦断面図である。
FIG. 2 is a vertical cross-sectional view showing a state when the propulsion shaft rotates to the reverse side according to the device of the present invention.

【図3】図2のx−x部を示す断面図である。FIG. 3 is a cross-sectional view showing a section xx in FIG.

【図4】図2のx1−x1部を示す断面図である。FIG. 4 is a cross-sectional view showing an x1-x1 portion of FIG.

【符号の説明】[Explanation of symbols]

1 船尾管 2a シール面 3 円筒ベローズ体 3a 鍔形ベローズ部 3b 円筒ベローズ体の前部 3c 円筒ベローズ体の後部 4 推進軸 6 シールリング 7 円筒ホルダ体 7a 円筒ホルダ体の前部 9 スプリング 1 Stern tube 2a Sealing surface 3 Cylindrical bellows body 3a Collar type bellows part 3b Front part of cylindrical bellows body 3c Rear part of cylindrical bellows body 4 Propulsion shaft 6 Seal ring 7 Cylindrical holder body 7a Front part of cylindrical holder body 9 Spring

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 外周囲の後部に輪状鍔形ベローズ部を具
備したゴム質円筒ベローズ体を推進軸の長手方向特定位
置に外嵌してその前部を推進軸の周面に密状に固定する
と共に後端面には船尾管の前部に設けたその半径方向の
シール面に摺動自在状態で密接されるシールリングを概
ね同心状に固定し、一方では前記円筒ベローズ体の周面
を包囲し且つ前記鍔形ベローズ部の周縁が内接するもの
とした円筒ホルダ体を設けてこれの前部を推進軸に固定
するほか、該ホルダ体の内方には前記円筒ベローズ体の
後部を後方へ押圧するためのスプリングを設けたことを
特徴とする船尾管シール装置。
1. A rubber cylindrical bellows body having a ring-shaped brim-shaped bellows portion at a rear portion of its outer periphery is externally fitted to a specific position in a longitudinal direction of a propulsion shaft, and its front portion is densely fixed to a peripheral surface of the propulsion shaft. A seal ring, which is slidably in close contact with the radial seal surface provided on the front portion of the stern tube, is fixed to the rear end surface in a substantially concentric manner, while the surrounding surface of the cylindrical bellows body is surrounded. In addition, a cylindrical holder body is provided in which the peripheral edge of the flange-shaped bellows portion is inscribed, and the front portion of the cylindrical holder body is fixed to the propulsion shaft. A stern tube sealing device comprising a spring for pressing.
JP7072227A 1995-02-21 1995-02-21 Stern tube sealing device Expired - Fee Related JP2694516B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7072227A JP2694516B2 (en) 1995-02-21 1995-02-21 Stern tube sealing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7072227A JP2694516B2 (en) 1995-02-21 1995-02-21 Stern tube sealing device

Publications (2)

Publication Number Publication Date
JPH08230789A true JPH08230789A (en) 1996-09-10
JP2694516B2 JP2694516B2 (en) 1997-12-24

Family

ID=13483176

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7072227A Expired - Fee Related JP2694516B2 (en) 1995-02-21 1995-02-21 Stern tube sealing device

Country Status (1)

Country Link
JP (1) JP2694516B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113928518A (en) * 2021-12-07 2022-01-14 重庆大学 Underwater vector propulsion device with variable posture

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60101366A (en) * 1983-11-04 1985-06-05 Shinsaku Kaguchi Emergency seal device of stern tube
JPS62265099A (en) * 1987-03-02 1987-11-17 Nakashima Puropera Kk Seal body structure in stern tube sealing

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60101366A (en) * 1983-11-04 1985-06-05 Shinsaku Kaguchi Emergency seal device of stern tube
JPS62265099A (en) * 1987-03-02 1987-11-17 Nakashima Puropera Kk Seal body structure in stern tube sealing

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113928518A (en) * 2021-12-07 2022-01-14 重庆大学 Underwater vector propulsion device with variable posture
CN113928518B (en) * 2021-12-07 2024-06-11 重庆大学 Underwater vector propulsion device with variable gesture

Also Published As

Publication number Publication date
JP2694516B2 (en) 1997-12-24

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