EP0770017A1 - Joint etanche flottant pour axes d'helice a haute vitesse de rotation avec generateur de circulation forcee d'huile incorpore et dispositifs de securite - Google Patents
Joint etanche flottant pour axes d'helice a haute vitesse de rotation avec generateur de circulation forcee d'huile incorpore et dispositifs de securiteInfo
- Publication number
- EP0770017A1 EP0770017A1 EP95926536A EP95926536A EP0770017A1 EP 0770017 A1 EP0770017 A1 EP 0770017A1 EP 95926536 A EP95926536 A EP 95926536A EP 95926536 A EP95926536 A EP 95926536A EP 0770017 A1 EP0770017 A1 EP 0770017A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- axis
- seal
- oil
- shaft
- water
- 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
Links
- 238000007667 floating Methods 0.000 title abstract description 4
- 229910000906 Bronze Inorganic materials 0.000 claims abstract description 49
- 239000010974 bronze Substances 0.000 claims abstract description 49
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 238000005461 lubrication Methods 0.000 claims abstract description 23
- 238000007789 sealing Methods 0.000 claims abstract description 19
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 230000003068 static effect Effects 0.000 claims abstract 4
- 239000004519 grease Substances 0.000 claims description 9
- 230000000903 blocking effect Effects 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 230000002706 hydrostatic effect Effects 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 230000008439 repair process Effects 0.000 claims description 2
- 230000001464 adherent effect Effects 0.000 claims 1
- 230000008595 infiltration Effects 0.000 claims 1
- 238000001764 infiltration Methods 0.000 claims 1
- 230000001050 lubricating effect Effects 0.000 abstract description 6
- 230000001939 inductive effect Effects 0.000 abstract 1
- 239000011800 void material Substances 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 57
- 229920001971 elastomer Polymers 0.000 description 10
- 210000004907 gland Anatomy 0.000 description 9
- 239000000806 elastomer Substances 0.000 description 6
- 150000002739 metals Chemical class 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000003570 air Substances 0.000 description 2
- 239000003831 antifriction material Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 206010063493 Premature ageing Diseases 0.000 description 1
- 208000032038 Premature aging Diseases 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000002470 thermal conductor Substances 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
- B63H23/321—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
- stuffing box comprising one or more badges in the form of a ring, of graphite asbestos, contained in a body concentric with the axis, which are pressed against the rotating propeller shaft.
- This water which penetrates inside the hull must be evacuated.
- Another problem of the cable gland manifests itself when the navigation is finished: it is necessary to tighten the badge very tightly, in order to prevent continuous dripping, which - during prolonged stops - would fill with water the boat, with the foreseeable consequences.
- Another very important problem is the absorption of energy, caused by the friction of the badge against the propeller shaft: the larger models have a cooling system. The friction thus generated constitutes a braking action on the axis, which absorbs a lot of motive power, with the consequence of greater consumption and a loss of speed. In other words it would be like driving a car with the handbrake pulled.
- the friction of the badge on the propeller shaft causes premature wear of the axis, which after a certain period must be replaced.
- Another sealing device normally used in some boats consists of a rotating joint consisting of a disc which rotates with the shaft, pushed by a spring against another disc covered by an anti-friction material (graphite, etc.) fixed to shell.
- an anti-friction material graphite, etc.
- a problem common to all cable glands and rotary joints is the fact that none can operate without water (eg in the case of a high speed formed by the vacuum of water in front of the propeller, or else in the event of obturation of catch at sea, etc.) because they spoil immediately.
- Second common problem is the passage of water, more or less important, depending on the type: the cable gland lets the water pass clearly, the rotating joint is watertight only when it is new, but at the smallest degradation of the friction track, it lets the water pass either with the axis in rotation than when stopped.
- FIG. 1 is an overall longitudinal section, representing a propeller axis emerging from the hull of a boat. On d o axis is shown in section the object of the invention.
- Fig. 2 is a cross section, representing the hull of a boat, the axis and the JOINT
- Fig. 3 is an overall longitudinal section of the SEAL.
- Fig. 4 is the enlargement of part of FIG. 3.
- Fig. 5 is a cross section of FIG. 4.
- Fig. 6 is another cross section of FIG. 4.
- Fig. 7 is a longitudinal section of the device with an option to add it.
- the present invention consists of a SEALING SEAL, two stages, completely sealed: it does not allow any drop of water to pass, neither when the propeller axis 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 inserted on the propeller shaft, which hermetically closes the orifice of the hull by means of a bellow shaped elastic tube trunk fixed on the outside of the case. same and the opening of the hull; while inside, in correspondence with the axis, at the front, it has an annular stop chamber filled with sealing material constituted by viscous insoluble grease which prevents the passage of water through the interstice socket, without causing friction or mechanical consumption.
- the second floor is made up of the oil chamber, which contains the bronze cushion.
- Fig. .1 is a longitudinal section, in which there is shown schematically a normal boat, with a drive shaft 2, which crosses the hull 1 through the orifice 3 surrounded by the trunk of tube 4 secured to the hull.
- the bronze bushing 11 (contained in the cylindrical case 9) is freely fitted on the propeller shaft 2, allowing it either to rotate freely, than to slide in axial shape, without offering resistances due to defects of alignments that force and increase friction. It is well known that transmissions made among bronze bearings are very difficult to achieve, because they require perfectly aligned bearing surfaces, machined with extreme care, because even very small misalignments determine resistance to the remarkable rotation. For this reason, in transmissions which are not produced on particularly rigid and perfectly machined structures, it is not possible to use bronze bearings, but normally self-orientating bearings are used.
- 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 mounted under pressure 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 hull, 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 sealing material consisting of viscous, insoluble grease.
- the cylindrical case 9 is concentric with the shaft and has in the front part an orifice with a diameter just greater than that of the shaft: this is enough not to rub on the shaft. After the initial opening, the inside diameter of the case increases, thus forming the annular blocking chamber 16, delimited at the bottom by the retaining ring 18.
- the annular blocking chamber 16 is filled by the viscous sealing element preferably made up of insoluble grease which, having a specific weight less than water, it is constantly maintained in pressure by the hydrostatic thrust, thus remaining constipated against the 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 lubricator 8 which fills the entire chamber 16 with grease, eliminating the air among the purge valve 17
- the cylindrical case 9 is preferably made of thermal conductive metal, resist corrosion (eg bronze or stainless steel).
- the said case is supported on its inside by the bronze cushion 11 made of anti-friction material, necessarily concentric content on two elastic rings of rubber (O ⁇ ng) 10 and 14
- the bronze bushing 1 1 - 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 screws on the cylindrical case 9
- the oil tank 24 is placed at a height greater than the water level, so as to exert a higher pressure on the oil contained in the chamber of the bronze bushing 1 1, to contrast and block the tendency to permeability of the sealant grease through the unidirectional retaining ring 18 So the unidirectional retaining ring 18 inside is lubricated by the oil contained by itself, while outside it is lubricated by the sealing grease. In this way the life of the clamping lip is extremely long.
- the asymmetrical lip retaining rings for rotating shafts with elastic elastomer lip are unidirectional. So they block any outflow of oil in one direction, while in the other direction they allow passage.
- the oil tank 24 is placed at a height greater than the level of the external water, given the difference in specific pea between the oil and the water. In this way the pressure of the external water on the sealing element is less than the oil back pressure, so as to avoid the permeability of the sealing element in the oil through the retaining ring. unidirectional 18, because this could affect the lubricating qualities of the oil.
- the elastic tube trunk in the form of a tubular bellows 5 is formed by a very thin rubber or by another elastomer resistant to oils and to sea water.
- the elastic tube trunk in the form of a bellows therefore does not offer any guarantee of resistance to torsion, consequently any improvised increase in friction of the bronze bushing on the axis (for example: due to a external accident which could cause the loss of the oil and the blocking of the bronze bushing 11) could cause the tearing of the thin rubber of the trunk of elastic tube in the form of a bellows, thus causing a very important and very dangerous entry of water .
- FIG. 2 illustrates a cross-sectional view of the anti-rotation device, constituted - by way of example - by a nested plate 37 loose on the barbed end 20
- a nested plate 37 loose on the barbed end 20
- an anti-rotation device - not limiting - is constituted by the profile 38 fixed to the hull, and with a hole wedged around the grooved nozzle 13 which is butted. Ulté ⁇ eur safety device against a possible, even if unlikely, seizure, is constituted by the fact that the bronze bushing 1 1 is simply fixed by pressure on the case 9, among the rings "O ⁇ ng" 10 and 14 So if by a fortuitous accident the bronze bearing would come to grip and tend to turn solidly to the shaft, it would turn on the rings "O ⁇ ng" 10 and 14 In this way the case 9 would not turn, because it would be blocked by the anti-rotation system, thus preserving the integrity of the trunk of elastic tube with bellows shape 5 which would not tear, thus eliminating any possibility of sinking of the boat.
- Fig. 3 shows the oil tank 24, from which the two supply pipes 31b start, fixed on the barbed ends 13b. These barbed ends are screwed onto the case 9, and let in the oil which in its passage lubricates the lips of the unidirectional asymmetric lip retaining rings made of elastomer 18 and 33. The oil continues its way and passes through the tunnels 32
- This oil pumping system is very effective, because we can see that pumping also takes place at extremely slow speeds: even by rotating the axis by hand we can appreciate the circulation. Naturally, the faster the axis turns, the more the quantity of oil pumped increases. If you want to obtain a higher flow, just proportion the pump, increasing the width of the same in the bronze bushing where it is incorporated.
- This pumping system has several advantages: Inexpensive a little more elaboration in the construction phase of the bronze bushing is enough to realize the pump, without having to resort to separate pumps, with also separate motos
- Fig 7 shows the example of application of the seal on a worn shaft of an old boat
- the shaft has the wear 50 caused by the friction of the badge of a traditional cable gland
- the tube trunk is supported concentric to the axis by the sleeve 52
- the tube trunk is wedged concentric with the axis, by the sleeve 53, blocked by the screw 55
- the sleeve is blocked with the shaft by the screw 58, therefore the tube trunk turns integral with the axis.
- the O-Rings 54 and 57 prevent the passage of water which could infiltrate through the sleeve 52 between the shaft and the interior of the tube trunk 51.
- the dito tube trunk fixed concentric to the axis d 'propeller we can therefore normally install the SEAL, as described In this way we can recover old worn shafts, without being obliged to replace them.
- the anti-rotation system in addition to being a safety device which prevents possible accidents, allows maximum buoyancy; therefore it allows operation even on bent but aligned trees and even in the case that they are not concentric with the outlet hole in the hull.
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)
Abstract
Description
Claims
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 | ||
MC2276K MC219A7 (fr) | 1994-08-10 | 1995-05-08 | Joint ètanche flottant pour axes d'hélices de bateaux avec dispositif de sécurité |
MC219 | 1995-05-08 | ||
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 true EP0770017A1 (fr) | 1997-05-02 |
EP0770017B1 EP0770017B1 (fr) | 1999-01-13 |
Family
ID=26640541
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95926536A Expired - Lifetime EP0770017B1 (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 |
Country Status (13)
Country | Link |
---|---|
US (1) | US5795198A (fr) |
EP (1) | EP0770017B1 (fr) |
JP (1) | JPH10504255A (fr) |
AU (1) | AU689932B2 (fr) |
DE (1) | DE69507304T2 (fr) |
ES (1) | ES2129211T3 (fr) |
FI (1) | FI111702B (fr) |
FR (1) | FR2723910A1 (fr) |
IT (1) | IT1283399B1 (fr) |
MC (1) | MC219A7 (fr) |
NO (1) | NO309711B1 (fr) |
NZ (1) | NZ290202A (fr) |
WO (1) | WO1996005100A1 (fr) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69529432T2 (de) * | 1994-09-08 | 2003-10-30 | Hitachi Zosen Corp., Osaka | Gegenläufige Lagerung für gegenläufige Propeller |
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)
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 |
-
1995
- 1995-05-08 MC MC2276K patent/MC219A7/fr unknown
- 1995-08-03 IT IT95SV000008A patent/IT1283399B1/it active IP Right Grant
- 1995-08-08 JP JP8507212A patent/JPH10504255A/ja not_active Ceased
- 1995-08-08 WO PCT/MC1995/000001 patent/WO1996005100A1/fr active IP Right Grant
- 1995-08-08 NZ NZ290202A patent/NZ290202A/xx unknown
- 1995-08-08 DE DE69507304T patent/DE69507304T2/de not_active Expired - Fee Related
- 1995-08-08 EP EP95926536A patent/EP0770017B1/fr not_active Expired - Lifetime
- 1995-08-08 ES ES95926536T patent/ES2129211T3/es not_active Expired - Lifetime
- 1995-08-08 AU AU30874/95A patent/AU689932B2/en not_active Ceased
- 1995-08-09 FR FR9509808A patent/FR2723910A1/fr active Pending
- 1995-08-09 US US08/776,741 patent/US5795198A/en not_active Expired - Fee Related
-
1997
- 1997-01-29 NO NO970376A patent/NO309711B1/no unknown
- 1997-02-05 FI FI970488A patent/FI111702B/fi active
Non-Patent Citations (1)
Title |
---|
See references of WO9605100A1 * |
Also Published As
Publication number | Publication date |
---|---|
AU3087495A (en) | 1996-03-07 |
FI970488A0 (fi) | 1997-02-05 |
AU689932B2 (en) | 1998-04-09 |
MC219A7 (fr) | 1996-03-29 |
ITSV950008A1 (it) | 1997-02-03 |
NZ290202A (en) | 1999-02-25 |
IT1283399B1 (it) | 1998-04-17 |
US5795198A (en) | 1998-08-18 |
DE69507304D1 (de) | 1999-02-25 |
NO970376D0 (no) | 1997-01-29 |
FI111702B (fi) | 2003-09-15 |
FR2723910A1 (fr) | 1996-03-01 |
WO1996005100A1 (fr) | 1996-02-22 |
ES2129211T3 (es) | 1999-06-01 |
ITSV950008A0 (it) | 1995-08-03 |
JPH10504255A (ja) | 1998-04-28 |
DE69507304T2 (de) | 1999-09-02 |
EP0770017B1 (fr) | 1999-01-13 |
FI970488A (fi) | 1997-03-10 |
NO970376L (no) | 1997-03-19 |
NO309711B1 (no) | 2001-03-19 |
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