EP0770017B1 - Mit zwangsölkreislauf und sicherheitsvorrichtung versehene bewegliche abdichtung für schnelllaufende propellerantriebswellen - Google Patents

Mit zwangsölkreislauf und sicherheitsvorrichtung versehene bewegliche abdichtung für schnelllaufende propellerantriebswellen Download PDF

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Publication number
EP0770017B1
EP0770017B1 EP95926536A EP95926536A EP0770017B1 EP 0770017 B1 EP0770017 B1 EP 0770017B1 EP 95926536 A EP95926536 A EP 95926536A EP 95926536 A EP95926536 A EP 95926536A EP 0770017 B1 EP0770017 B1 EP 0770017B1
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EP
European Patent Office
Prior art keywords
oil
chamber
shaft
bushing
seal joint
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 - Lifetime
Application number
EP95926536A
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English (en)
French (fr)
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EP0770017A1 (de
Inventor
Antonio Pedone
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Individual
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Individual
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Publication date
Priority claimed from MC2276A external-priority patent/MC2367A1/xx
Application filed by Individual filed Critical Individual
Publication of EP0770017A1 publication Critical patent/EP0770017A1/de
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Publication of EP0770017B1 publication Critical patent/EP0770017B1/de
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    • 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
    • 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
    • B63H2023/327—Sealings specially adapted for propeller shafts or stern tubes

Definitions

  • normally cable glands comprising one or more badges in the form of a ring, graphite asbestos, contained in a body concentric to the axis, which are pressed against the shaft of rotating propeller.
  • This water which penetrates inside the hull must be evacuated.
  • the cable gland is rigidly mounted to the shell, it transmits all vibrations from the propeller shaft to the hull itself.
  • propeller the engine coupling, the cable gland and the propeller chair. Since this is a structure which is not a rigid monoblock machined at the same time in a single piece, perfect alignment is almost impossible, so the transmission axis never works in the optimal condition, therefore having a high resistance to rotation, due not only to the action braking of the badge, but due to the forcing of the transmission, consequent to the impossibility of perfect alignment.
  • Another sealing device normally used in some boats is in a rotary joint consisting of a disc which rotates with the shaft, pushed by a spring against another disc covered with an anti-friction material (graphite, etc.) attached to the hull.
  • an anti-friction material graphite, etc.
  • Second common problem is the passage of water, more or less important, according to the type: the cable gland lets the water pass clearly, the rotating joint is waterproof only when new, but at the smallest degradation of the runway friction, it lets the water pass either with the axis in rotation than when stopped.
  • the present invention consists of a two-stage seal, completely waterproof: it does not allow any drop of water to pass, nor when the axis propeller turns, nor when it is stopped.
  • the two floors, one after the other, constitute two impassable dams for water.
  • It is a cylindrical case freely fitted on the propeller shaft, which hermetically closes the opening of the hull by means of a trunk of elastic tube in the form of a bellows fixed on the outside of the case itself and the opening of the shell: while inside, in correspondence with the axis, front, it has an annular stop chamber filled with sealing material consisting of grease insoluble viscous which prevents water from passing through the socket-axis gap, without causing friction or mechanical consumption.
  • the second stage consists of the oil chamber, which contains the bronze cushion.
  • Fig. .1 is a longitudinal section, in which a normal boat is schematized, with a transmission shaft 2, which passes through the shell 1 through the orifice 3 surrounded by the tube trunk 4 integral with the hull.
  • the bronze bushing 11 (contained in the cylindrical case 9) is freely fitted on the axis propeller 2, allowing it to either rotate freely, than to slide in axial shape, without offering resistances due to misalignments which force and increase the fiction.
  • the bronze bushing of the present invention allows the shaft on which it is mounted to rotate freely, without causing any resistance, either to radial movement or to axial movement, also thanks to the forced lubrication system that will be exposed immediately.
  • the cylindrical case 9 On the bronze bushing 11 is pressure mounted among elastic rings O ring 10 and 14, the cylindrical case 9. On this one is fixed one end of a trunk of elastic tube in the form of elastic bellows 5; while the other end is fixed to the tube trunk 4 which surrounds the orifice 3 of the hull (through which the propeller shaft comes out) So the water which penetrates through the orifice on the shell, is contained by the trunk of elastic tube in the form of a bellows, by the shaft, and by the annular stop chamber 16 of the cylindrical case 9, full of sealing material constituted by insoluble viscous fat.
  • the cylindrical case 9 is concentric with the shaft and has an opening in the front part with a diameter just greater than that of the tree: enough to avoid rubbing on the tree. After the initial hole, the inside diameter of the case increases, thus forming the annular chamber of blocking 16, delimited at the bottom by the retaining ring 18.
  • the annular blocking chamber 16 is filled with the viscous sealing element constituted preferably by insoluble fat which, having a specific weight less than water, is constantly maintained in pressure by the hydrostatic thrust, thus remaining constipated against walls of the annular blocking chamber 16, against the retaining ring 18, and against the shaft 2; thus preventing any passage of water inside the annular blocking chamber.
  • the viscous sealing element constituted preferably by insoluble fat which, having a specific weight less than water, is constantly maintained in pressure by the hydrostatic thrust, thus remaining constipated against walls of the annular blocking chamber 16, against the retaining ring 18, and against the shaft 2; thus preventing any passage of water inside the annular blocking chamber.
  • the viscous sealing element is introduced at the start into the blocking chamber, among the Stauffer 8 lubricator which fills the entire chamber 16 with grease, eliminating air from the valve purge 17.
  • the cylindrical case 9 is preferably made of thermal conductive metal, withstand the corrosion (e.g. bronze or stainless steel). Said case is supported inside by the pad in bronze 11 in anti-friction material, content necessarily concentric on two elastic rings of rubber (O ring) 10 and 14.
  • the bronze bushing Il - lubricated by forced circulation of oil on the shaft - supports and guides the cylindrical case 9, keeping it always concentric and parallel to the axis on which it is mounted, axis which can rotate freely, thanks to the lubrication provided by the oil 23 contained in the reservoir 24, among the supply tubes 31b fixed on the barbed ends 13b screwed onto the cylindrical case 9.
  • Lubrication continuity is very important and should never be missed either in the bearing bronze on the shaft, and above all with elastic asymmetrical lip retaining rings for shafts turning points.
  • the oil tank 24 is placed at a height higher than the water level, so as to exert a higher oil pressure in the chamber of the bronze bushing 11, to contrast and block the tendency for permeability of the sealant grease through the retaining ring unidirectional 18.
  • Asymmetrical lip retaining rings for rotating shafts with elastic lip in elastomer are unidirectional. So they block any outflow of oil in one direction, while that in the other direction they allow the passage.
  • the oil tank 24 is placed at a height greater than the level of the external water, seen from the specific pea difference between oil and water. In this way the push of the outside water on the sealing element is less than the oil back pressure, so as to avoid the permeability of the sealing element in oil through the unidirectional retaining ring 18, because it could affect the lubricating qualities of the oil.
  • the elastic tube trunk in the form of a tubular bellows 5 consists of a very thin rubber or by another elastomer resistant to oils and seawater.
  • the elastic trunk of bellows-shaped tube must be tubular 5 or very thin walls. But in this case the elastic tube trunk in the form of a bellows therefore does not offer any guarantee of resistance to torsion, therefore any improvised friction increase of the bronze bushing on the axis (for example: due to a external accident which could cause the loss of oil and the blocking of the bronze bushing 11) could cause the thin rubber of the elastic tube-shaped trunk to tear bellows, causing a very large and very dangerous entry of water.
  • FIG. 2 illustrates a sectional view transverse anti-rotation device, constituted - by way of example - by a plate 39 fitted loose on the grooved end piece 20.
  • a plate 39 fitted loose on the grooved end piece 20.
  • non-limiting anti-rotation device is constituted by the section 38 fixed. to the hull, and with a hole wedged around the barbed end piece 13 which is butted.
  • an oil level sensor 21 (Fig. 1) can be introduced into the oil tank 24 which, in in the event of a drop in the oil level, first intervenes with a bell, and then stops the engine.
  • an oil pump has been produced incorporated in the same bronze bushing 11, and that not only uses the rotary motion of the axis on which it is mounted, but it uses the axis even, as the basic organ of this very original pump.
  • Fig. 3 shows the oil tank 24, from which the two supply pipes 31b, attached on the barbed ends 13b. These barbed ends are screwed onto the case 9, and allow the oil to enter which in its passage lubricates the lips of the asymmetrical lip retaining rings unidirectional in elastomer 18 and 33.
  • the oil continues its way and passes through the tunnels 32 (see also Fig. 5) of the bronze bushing 11, where it constantly lubricates the axis which turns in the bronze bushing (see also Fig. 4 and 5) by entering the space between the axis and the bronze bushing, thus forming a thin layer of intermediate oil that separates the two metals. So this intermediate layer prevents the friction of metals by preserving them from wear.
  • the oil is dragged by the axis in its rotation, by the phenomena of "surface tension” and “sticking of a viscous liquid to a solid (the axis)", and it is compressed towards the constriction of the eccentric room.
  • a small part of oil is threaded between the axis and the portion with the diameter almost adherent to the same, forming the intermediate layer which guarantees lubrication and prevents direct contact between the two metals, preserving them from wear.
  • the excess of oil which does not manage to get between the axis and the bronze, accumulates near strangulation which causes an increase in pressure.
  • Fig. 7 shows the example of application of the seal on a worn shaft of a boat former.
  • the shaft has the wear 50 caused by the friction of the bademe of a cable gland traditional.
  • a rigid tube trunk 51 with an internal diameter is mounted. slightly higher than that of the tree.
  • the tube trunk is supported concentric to the axis by the sleeve 52.
  • the tube trunk is wedged concentric to the axis, by the bush 53, blocked by the screw 55.
  • the bush is blocked at the shaft by the screw 58, so the tube trunk turns integral with the axis.
  • O-Rings 54 and 57 prevent the passage of water which could infiltrate through the socket 52 between the shaft and the inside of the tube trunk 51.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Sealing Devices (AREA)
  • Sealing With Elastic Sealing Lips (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Sealing Of Bearings (AREA)

Claims (8)

  1. Abdichtung für durch den Schiffskörper hindurchgehende Propellerantriebswellen, umfassend ein Wellenstützlager (11) aus Bronze, welches auf die Propellerantriebswelle (2) eingepaßt ist, indem es mit elastischen Ringen (10, 14), einem diese Welle stromabwärts von dem Wellenstützlager (11) umgebenden, elastischen Blasebalg (5) und einem Schmierölkreislauf zusammenwirkt, dadurch gekennzeichnet, daß sie aus zwei Stufen ausgebildet ist, welche betreffend die Dichheit in bezug auf das Wasser zusammenwirken und jeweils aus einer ersten Ringkammer (16) zum Blockieren von Wasser bzw. Abdichten gegen Wasser, welche mit einem viskosen, unlöslichen Versiegelungselement gefüllt ist, und aus einer zweiten mit dem Schmieröl (23) gefüllten Kammer (32, 34, 35) bestehen, und daß der Kreislauf des Schmieröls (23) ein geschlossener Kreislauf mit Zwangsumlauf ist, der während der Rotation der Propellerantriebswelle (2) in dem Wellenstützlager (11), im Inneren einer exzentrischen Kammer (34) erzeugt wird, welche Kammer ruhend bzw. statisch in demselben Wellenstützlager ausgebildet ist, welches frei ohne jede starre Fixierung auf die Propellerantriebswelle eingepaßt ist, weshalb letztere frei ist, auch axial zu gleiten und sich nicht nur zu drehen.
  2. Abdichtung nach Anspruch 1, dadurch gekennzeichnet, daß die exzentrische und in bezug auf die Propellerantriebswelle (2) ruhende bzw. statische Innenkammer (34) sich in einer Kammer (35) mit zylindrischer Ringform zwischen dem Wellenstützlager (11) und einem ebenfalls zylindrischen, sie umgebenden Gehäuse (9) fortsetzt, wobei die zwei Kammern durch das Schmieröl (23) mit Zwangsumlauf, welches durch die Rotation der Welle (2) mitgenommen ist, durchströmt sind.
  3. Abdichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß sie stromaufwärts mit einem elektrischen Sicherheitsunterbrecher (25) versehen ist, dessen Regel- oder Steuerarm (26) sich zwischen zwei elastischen Ringen (27, 28) befindet, die auf der Propellerantriebswelle (2) festgelegt sind, welche den Regel- bzw. Steuerarm bei einem übermässigen Gleiten der Welle betätigen.
  4. Abdichtung nach Anspruch 2, dadurch gekennzeichnet, daß das zylindrische Gehäuse (9) mit einer Antirotationsvorrichtung versehen ist, die aus einem von einer Abstützung (38, 39), die an dem Schiffsrumpf befestigt ist, umgebenden Vorsprung (20) gebildet ist.
  5. Abdichtung nach Anspruch 1, dadurch gekennzeichnet, daß die zweite Kammer (32, 34, 35) durch die elastischen Ringe (10, 14) fortgesetzt ist, und über ein Loch (12) des Wellenstützlagers (11) mit einem Ring kanal (30) um die Propellerantriebswelle (2) fortgesetzt ist, um die letztere, das Wellenstützlager (11) aus Bronze und ein Paar elastischer und asymmetrischer Lippen der zwei Rückhalteringe (18, 33) für die drehbaren Wellen zu schmieren.
  6. Abdichtung nach Anspruch 2 und 5, dadurch gekennzeichnet, daß sie ein Reservoir (24) für Öl (23) umfaßt, welches auf einer über dem Wasserniveau liegenden Höhe angeordnet ist, um Öl der zweiten Kammer (32, 34, 35) mittels Zuführrohren (31b), die mittels gerippten Ansatzstücken (13b) auf dem zylindrischen Gehäuse (9) festgelegt sind, über den genannten, ringförmigen Kanal (30) nachzufüllen, wobei ein geripptes Ansatzstück (13) in Verbindung mit der Kammer (35) für den Austritt des Öls (23) und die Rückführung ins Reservoir (24) über ein Rückführungsrohr (31) vorgesehen ist.
  7. Abdichtung nach Anspruch 6, dadurch gekennzeichnet, daß auf dem Rückführungsrohr (31) stromaufwärts vom Resevoir (24) ein Ölfilter (36) und ein Wärmetauscher (37) vorgesehen sind.
  8. Abdichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß sie einen starren Rohrstumpf (51) mit ausreichender Länge umfaßt, um auf dem beschädigten Teil (50) einer Propellerantriebswelle, die in einem alten Schiff verwendet wurde, festgekeilt angeordnet zu werden und konzentrisch an der Welle durch Hülsen (52, 53) gehalten zu werden, in welchen die elastischen Ringe (54, 56) vorgesehen sind, um die geringste Infiltration von Wasser zu verhindern.
EP95926536A 1994-08-10 1995-08-08 Mit zwangsölkreislauf und sicherheitsvorrichtung versehene bewegliche abdichtung für schnelllaufende propellerantriebswellen Expired - Lifetime EP0770017B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
MC2276A MC2367A1 (fr) 1994-08-10 1994-08-10 Joint étanche flottant pour axes d'hélices de bateaux de plaisance avec dispositif de sécurité
MC2276 1994-08-10
MC219 1995-05-08
MC2276K MC219A7 (fr) 1994-08-10 1995-05-08 Joint ètanche flottant pour axes d'hélices de bateaux avec dispositif de sécurité
PCT/MC1995/000001 WO1996005100A1 (fr) 1994-08-10 1995-08-08 Joint etanche flottant pour axes d'helice a haute vitesse de rotation avec generateur de circulation forcee d'huile incorpore et dispositifs de securite

Publications (2)

Publication Number Publication Date
EP0770017A1 EP0770017A1 (de) 1997-05-02
EP0770017B1 true EP0770017B1 (de) 1999-01-13

Family

ID=26640541

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95926536A Expired - Lifetime EP0770017B1 (de) 1994-08-10 1995-08-08 Mit zwangsölkreislauf und sicherheitsvorrichtung versehene bewegliche abdichtung für schnelllaufende propellerantriebswellen

Country Status (13)

Country Link
US (1) US5795198A (de)
EP (1) EP0770017B1 (de)
JP (1) JPH10504255A (de)
AU (1) AU689932B2 (de)
DE (1) DE69507304T2 (de)
ES (1) ES2129211T3 (de)
FI (1) FI111702B (de)
FR (1) FR2723910A1 (de)
IT (1) IT1283399B1 (de)
MC (1) MC219A7 (de)
NO (1) NO309711B1 (de)
NZ (1) NZ290202A (de)
WO (1) WO1996005100A1 (de)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69529422T2 (de) * 1994-09-08 2003-10-30 Hitachi Zosen Corp., Osaka Umkehrbare lagervorrichtung für umkehrbare doppelschraube
AT405393B (de) * 1997-01-24 1999-07-26 Frantl Conprojekt Kieleinrichtung für ein segelschiff
US5911607A (en) * 1997-09-16 1999-06-15 Lacko; Mark A. Sealing assembly for propeller drive shaft
GB2334313A (en) * 1998-02-13 1999-08-18 Halyard Propeller shaft seal and bearing assembly
DE10040211C2 (de) * 2000-08-17 2002-10-17 B & V Industrietechnik Gmbh Vorrichtung zur Abdichtung von Antriebswellen
JP3946019B2 (ja) * 2001-09-18 2007-07-18 本田技研工業株式会社 船舶用ドライブシャフトの軸受け構造
KR20030041385A (ko) * 2001-11-20 2003-05-27 (주)이젠텍 의류건조기
NL1025959C2 (nl) * 2004-04-15 2005-10-18 Ihc Holland Nv Afdichtingsconstructie.
JP4993688B2 (ja) * 2006-11-15 2012-08-08 オークマ株式会社 主軸潤滑装置
NO330761B1 (no) * 2007-06-01 2011-07-04 Fmc Kongsberg Subsea As Undersjoisk kjoleenhet og fremgangsmate for undersjoisk kjoling
US8850655B2 (en) 2012-02-28 2014-10-07 General Electric Company Bronze bushing and wear surface
JP6752361B2 (ja) * 2017-04-18 2020-09-09 ジャパンマリンユナイテッド株式会社 二重反転プロペラ装置とこれを用いた船舶

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3565447A (en) * 1967-10-05 1971-02-23 Inst Schiffbau Stern tube seal
US3625523A (en) * 1970-02-13 1971-12-07 Waukesha Bearings Corp Aft sealing assembly for stern tubes
US3844247A (en) * 1973-01-04 1974-10-29 Outboard Marine Corp Tilt position indicator
GB1575919A (en) * 1976-12-20 1980-10-01 Cox J Ship's propeller shaft sealing assembly
GB2251273B (en) * 1990-12-15 1994-10-05 Robin David Shaw Shaft seal

Also Published As

Publication number Publication date
ITSV950008A1 (it) 1997-02-03
AU689932B2 (en) 1998-04-09
ES2129211T3 (es) 1999-06-01
MC219A7 (fr) 1996-03-29
NZ290202A (en) 1999-02-25
WO1996005100A1 (fr) 1996-02-22
JPH10504255A (ja) 1998-04-28
EP0770017A1 (de) 1997-05-02
AU3087495A (en) 1996-03-07
IT1283399B1 (it) 1998-04-17
FR2723910A1 (fr) 1996-03-01
FI111702B (fi) 2003-09-15
NO970376L (no) 1997-03-19
ITSV950008A0 (it) 1995-08-03
DE69507304D1 (de) 1999-02-25
NO309711B1 (no) 2001-03-19
FI970488A0 (fi) 1997-02-05
FI970488A (fi) 1997-03-10
US5795198A (en) 1998-08-18
DE69507304T2 (de) 1999-09-02
NO970376D0 (no) 1997-01-29

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