GB2213539A - Shaft seal - Google Patents

Shaft seal Download PDF

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Publication number
GB2213539A
GB2213539A GB8828437A GB8828437A GB2213539A GB 2213539 A GB2213539 A GB 2213539A GB 8828437 A GB8828437 A GB 8828437A GB 8828437 A GB8828437 A GB 8828437A GB 2213539 A GB2213539 A GB 2213539A
Authority
GB
United Kingdom
Prior art keywords
pressure
lubricant
ring chamber
chamber
sealing
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
GB8828437A
Other versions
GB2213539B (en
GB8828437D0 (en
Inventor
Guenter Pietsch
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.)
Blohm and Voss GmbH
Original Assignee
Blohm and Voss GmbH
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 Blohm and Voss GmbH filed Critical Blohm and Voss GmbH
Publication of GB8828437D0 publication Critical patent/GB8828437D0/en
Publication of GB2213539A publication Critical patent/GB2213539A/en
Application granted granted Critical
Publication of GB2213539B publication Critical patent/GB2213539B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H23/00—Transmitting power from propulsion power plant to propulsive elements
    • B63H23/32—Other parts
    • B63H23/321—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
    • B63H23/34—Propeller shafts; Paddle-wheel shafts; Attachment of propellers on shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B33/00—Features common to bolt and nut
    • F16B33/002—Means for preventing rotation of screw-threaded elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/08—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing
    • F01C1/10—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F01C1/103—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C20/00—Control of, monitoring of, or safety arrangements for, machines or engines
    • F01C20/24—Control of, monitoring of, or safety arrangements for, machines or engines characterised by using valves for controlling pressure or flow rate, e.g. discharge valves
    • F01C20/26—Control of, monitoring of, or safety arrangements for, machines or engines characterised by using valves for controlling pressure or flow rate, e.g. discharge valves using bypass channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/121—Casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F04B49/065—Control using electricity and making use of computers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/08—Regulating by delivery pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B43/00—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts
    • F16B43/001—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts for sealing or insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/002—Sealings comprising at least two sealings in succession
    • F16J15/004—Sealings comprising at least two sealings in succession forming of recuperation chamber for the leaking fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/40—Sealings between relatively-moving surfaces by means of fluid
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S411/00—Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
    • Y10S411/955—Locked bolthead or nut
    • Y10S411/974—Side lock
    • Y10S411/984—Longitudinal
    • Y10S411/99—Washer tongue-held

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Computer Hardware Design (AREA)
  • Sealing Devices (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
  • Sealing With Elastic Sealing Lips (AREA)
  • Sealing Of Bearings (AREA)

Description

-11 ArrancTement for the sealinq of the propeller shaft of a shiD The
invention relates to an arrangement for the sealing of a propeller shaft of a ship having the measures set forth in the preamble of claim 1.
In sealing arrangements of this kind (German laying open print 2 212 165) the pressure of the pressurized gas is selected to be a small amount higher than the pressure of the medium to be sealed so that small quantities of gas escape from the ring chamber into the adjacent chambers. In this way the emergence of lubricant into the seawater is admittedly prevented, not however the entry of gas into the lubricant which leads to a gradual emulsification of the lubricant which naturally reduces its lubricating ability. Moreover, in these known seals there is no continuous matching of the gas pressure to the fluctuations of the external water pressure in the region of the seal so that, for example on rising external water pressure during the loading of the ship, seawater can enter into the ring chamber and from there into the lubricant and can reduce its lubricating ability still further.
In order to overcome these deficiencies it has already been proposed (DEOS 3502395) to regulate the pressure of the pressurised gas in the ring chamber so that it is always lower than the lubricant pressure in the lubricant chamber, but is-sufficient to force leakage liquid out of the ring chamber through a discharge line into a collection container.
In these sealing arrangements no provision is made for the pressure of the pressurized air to be kept always lower than the prevailing external water pressure, so that it can happen that on reduction of the external water pressure, for example on unloading the ship, that a pressure drop occurs between the ring chamber and the external water through which the leakage liquid passes out of the ring chamber into the seawater and thus causes environmental pollution.
It is furthermore unfavourable in this known arrangement that a continous pressure loss takes place via the collection container, since the feed line does not form a closed line system with the discharge line, so that, on the one hand, a relatively large forwarding power is required of the pressurized air source and, on the other hand, larger pressure fluctuations are unavoidabile.
Furthermore, sealing systems are already known (German Offenlegungsschrift 3 122 407) in which a pressureless leakage chamber is arranged between the sealing rings and any leakage which seeps in is emptied via a line which leads into the interior of the ship.
The loading of the sealing rings in this arrangement is relatively high due to the pressureless leakage chamber and considerable wear of the sealing rings and at the sleeve/shaft takes place here after a short period of time as a result of the poor lubrication of the sealing rings. Failure of the sealing rings can then lead to severe environmental pollution.
Such systems can thus only be classified as conditionally environmentally friendly since lubricant which seeps here into the leakage chamber is also partly taken along as a t- 11 tail of lubricant by the rotating shaft and is then. eventually pumped into the surrounding seawater.
The invention is based on the object of overcoming the disadvantages and deficiencies of the named known devices and accordingly of providing a sealing arrangement in which both deterioration of the lubricant by seawater penetrating into the lubricant chamber and also environmental pollution by the emergence of lubricant into the surrounding seawater is largely avoided, and in which the lifetime of the sealing rings is improved.
This object is satisfied in accordance with the invention by the combination of the measures set forth in the characterizing part of claim 1. In this respect the measure designated a) ensures that even with fluctuations of the external water pressure upwardly or downwardly the same or a fractionally lower pressure always prevails in the ring chamber than in the surrounding outside water and in the lubricant chamber, so that any eventual lubricant or seawater leakages can seep by pump action or the like into the ring chamber and can be stored there for short time without emerging into the outside water, or into the lubricant chamber, and can then be discharged via lines leading into the interior of the ship through pressure reduction in accordance with feature b). The discharge is hereby assisted by the feature c). With this system it is possible to renounce the leakage chamber which is otherwise necessary and to so regulate the lubricant pre ssure that the lubricant pressure and the water pressure are the same. The gas pressure is expediently set approximately 0.1 to 0.4 bar lower in the ring chamber or in ring chambers so that the sealing rings are only loaded to a small degree.
In accordance with a preferred embodiment of the subject of claim 1 provision is made that the blocking member is formed as a solenoid valve (claim 2). In this way remote operation is made possible in simple manner. Further embodiments are characterized in that the control of the blocking member is brought about by a probe or a float arranged in the lower part of the ring chamber (claim 3), or in that the control is brought about by a periodically acting time switch (claim 4).
The first embodiment brings about an emptying of the ring chamber in dependence on the degree of filling of the ring chamber with leakage liquid and is in particularly suitable for strongly fluctuating operating conditions, whereas the latter embodiment brings about batchwise emptying which offers itself for more constant conditions.
Finally, provision is made that the amount by which the pressure of the pressure gas is kept lower than the pressure of the media to be sealed amounts to 0.1 to 0.4 bar. This pressure difference range has proved to be particularly advantageous.
Further particulars are described with reference to the accompanying drawings which show a sealing arrangement and the lines connected therewith only in schematic form.
The drawing shows the section of a seal 1 with three sealing rings 2 which form two ring chambers 3 and which seal, on the one hand, against the seawater W and, on the other hand, against the lubricant, in the present case lubricating oil S. One of the ring chambers is provided with an infeed channel 4 and a discharge channel 5 which are connected together (line part in broken lines) and thus form a closed line system pressurized with pressurized air.
1 The discharge channel 5 has a branch channel 5a which opens into the interior of the ship (bilge) and which is controlled by a three way valve with a solenoid valve 6 at the branch position. The solenoid valve 6 is controlled by a timing circuit in such a way that the discharge channel is periodically opened at predetermined time intervals and makes the flow of leakage liquid out of the ring chamber possible.
The discharge of the leakage medium can also be effected by a float or probe control. The infeed channel 4 contains a simple regulating unit 8 which controls the pressure in the chamber system at any time such that the pressure of the pressurized air in the line system is always kept 0.1 to 0.4 bar lower than the pressure of the two media to be sealed.
-.;. s 3 and A scraper 7 is built into one of the ring chambe scrapes lubricating oil which adheres to the shaft sleeve B, and which has seeped into the ring chamber through pump action of the shaft sleeve despite the above named measures, into the lower region of the ring chamber.
CO

Claims (5)

P a t e n t C 1 a i m s
1. Arrangement for the sealing of a propeller shaft of a ship against the seawater and against a lubricant chamber, the arrangement comprising a multiple seal which is equipped at the seawater side with at least one outwardly directed sealing ring and at the lubricant chamber side with at least one inwardly directed sealing ring, with a ring chamber being carved out in each case between two adjacent sealing rings, and with the ring chamber being pressurised via a feed line with a pressurised gas, in particular pressurized air, characterized in that a) the pressure of the pressurised gas is always kept fractionally lower than the prevailing external water pressure and the lubricant pressure, or the same as ternal water pressure and the the prevailing ext lubricant pressure, b) a discharge line opens into the pressurized ring chamber and forms a closed line system with the associated feed line, with the pressure maintenance in the line system taking place by means of a pressure regulating member inserted into the feed line, and with a discharge passage being connected to the discharge line via a controlled blocking member, with the discharge passage opening into the interior of the ship (bilges) and serving to convey away leakage liquid which has seeped into the ring chamber; and C) a scraper is arranged in and rigidly connected with the ring chamber, with the scraper being so shaped that it scrapes lubricant adhering to the shaft away from the latter and directs it into the lower part of the ring chamber.
7
2. Sealing arrangement in accordance with claim 1, characterized in that the blocking member is formed as a three-way valve with a solenoid valve.
3. Sealing arrangement in accordance with claim 1 or claim 2, characterized in that the control of the blocking member is brought about by a probe arranged in the lower part of the ring chamber or via a float.
4. Sealing arrangement in accordance with claim 1 or claim 2, characterized in that the control of the blocking member is brought about by a periodically operating time switch.
5. Sealing arrangement in accordance with one of the claims 1 to 3, characterized in that the amount by which the pressure of the pressure gas is kept lower than the pressure of the media to be sealed amounts to 0.1 to 0.4 bar.
A.
Published 1989 at T'hePatent Office. State House. 66 71 H,.ghHoitcrn, LondoiiWCIR4TP.PLirther copies maybe obtained from The Patent Office. Sales Branch, St Mary Cray Orpington. Kent BR5 3RD Printed by Multiplex techniques ltd. St Mary Cray, Kent, Con. 1187
GB8828437A 1987-12-11 1988-12-06 Sealing unit for the sealing of the propeller of a ship. Expired - Lifetime GB2213539B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3742079A DE3742079C2 (en) 1987-12-11 1987-12-11 Arrangement for sealing a propeller shaft of a ship

Publications (3)

Publication Number Publication Date
GB8828437D0 GB8828437D0 (en) 1989-01-05
GB2213539A true GB2213539A (en) 1989-08-16
GB2213539B GB2213539B (en) 1991-12-11

Family

ID=6342409

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8828437A Expired - Lifetime GB2213539B (en) 1987-12-11 1988-12-06 Sealing unit for the sealing of the propeller of a ship.

Country Status (8)

Country Link
JP (1) JP2599983B2 (en)
KR (1) KR0142103B1 (en)
CN (1) CN1010796B (en)
AU (1) AU608393B2 (en)
DE (1) DE3742079C2 (en)
GB (1) GB2213539B (en)
NL (1) NL192828C (en)
SE (1) SE501926C2 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2252597A (en) * 1991-02-06 1992-08-12 Cocksedge Eng Ltd Seals for roller assemblies
WO1999030124A1 (en) * 1997-12-09 1999-06-17 Cromar Sales And Service Limited The testing of the integrity of a fluid coupling
GB2448930A (en) * 2007-05-04 2008-11-05 Flybrid Systems Llp Seal for a high speed shaft
WO2010064001A2 (en) * 2008-12-04 2010-06-10 Schlumberger Holdings Limited Sealing glands and methods of use
US8234953B2 (en) 2007-05-17 2012-08-07 Flybrid Systems Llp High speed flywheel containment
US9233745B2 (en) 2013-05-22 2016-01-12 Skf Blohm + Voss Industries Gmbh Seal apparatus for a ship propeller shaft and method of making the apparatus
US9404582B2 (en) 2012-08-18 2016-08-02 Blohm + Voss Industries Gmbh Seal arrangement for a rotating ship propeller shaft
US9410627B2 (en) 2012-05-12 2016-08-09 Blohm + Voss Industries Gmbh Seal arrangement with improved shaft bushing for a rotating ship propeller shaft
US9447883B2 (en) 2011-04-11 2016-09-20 Blohm + Voss Industries Gmbh Seal for sealing shafts
RU2670552C1 (en) * 2014-11-03 2018-10-23 Абб Ой Ship sealing device, power plant, ship and ship's propeller shaft sealing method

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DE3800706C2 (en) * 1988-01-13 1994-09-01 Blohm Voss Ag Kit for a shaft seal, especially on a stern tube of a ship
JP2509401B2 (en) * 1991-09-30 1996-06-19 株式会社神戸製鋼所 Stern tube shaft seal device and its control method
DE4333880C2 (en) * 1993-10-05 2003-03-06 Sms Demag Ag roller bearing
DE4434247B4 (en) * 1994-09-24 2004-07-15 B + V Industrietechnik Gmbh Safety device on sealing arrangements for propeller shafts of ships
DE4434261B4 (en) * 1994-09-24 2004-07-08 B + V Industrietechnik Gmbh System to adapt to the changing draft of seagoing vessels
JP2002340199A (en) * 2001-05-11 2002-11-27 Eagle Ind Co Ltd Stern pipe shaft seal device
EP1446597B1 (en) * 2001-11-22 2010-02-24 MT Sealing Technology Inc. Oil scraper ring divided into segments
DE10241025B4 (en) * 2002-09-05 2004-08-12 EISENMANN Maschinenbau KG (Komplementär: Eisenmann-Stiftung) Transport trolley for a system for treating, in particular for painting, objects, in particular vehicle bodies
CN102197253B (en) * 2008-10-22 2013-10-30 瑞士单浮筒系泊公司 High pressure fluid swivel comprising multi seal pressure regulation system
CN102086936B (en) * 2009-12-08 2013-06-19 张意立 Novel matching device with improved fluid sealing structure
KR101272451B1 (en) * 2009-12-18 2013-06-07 현대중공업 주식회사 Seal Pressure Control Equipment of Thruster and Pressure Control Method
CN102322386B (en) * 2011-09-26 2013-03-13 浙江大学 Method for sealing ocean-current energy power generation device under the water
CN102556320B (en) * 2011-12-29 2014-05-28 苏州船用动力系统股份有限公司 Sealing structure of ship impeller underwater propeller shaft
US10065724B2 (en) 2012-04-17 2018-09-04 Wartsila Finland Oy Arrangement for sealing a propeller shaft of a marine vessel and a method of controlling the operation thereof
CN103411122B (en) * 2013-07-30 2015-12-23 苏州豪建纺织有限公司 A kind of loom roll shaft oil-impermeable device
DE102014217223B4 (en) * 2014-08-28 2016-09-15 Skf Blohm + Voss Industries Gmbh Sealing system, procedure and watercraft
CN105952620A (en) * 2016-05-13 2016-09-21 蚌埠市金鹏燃气设备制造有限公司 Oil scraping device for piston type compressor
DE102017213830A1 (en) * 2017-08-08 2019-02-14 Skf Marine Gmbh Sealing arrangement with connecting channel
CN108953118A (en) * 2018-07-13 2018-12-07 成都添益天然气压缩机制造有限公司 Body in natural gas compressor Multicarity
CN109469734A (en) * 2018-12-06 2019-03-15 中信重工机械股份有限公司 A kind of underwater rotary sealing matched with sinking method shaft excavation machine
CN110894910A (en) * 2019-12-11 2020-03-20 天津长瑞大通流体控制系统有限公司 Leakage-free detection system and method for sealing device with alarm
CN110906003A (en) * 2019-12-11 2020-03-24 天津长瑞大通流体控制系统有限公司 Leak-free detection system and method for a sealing device with a collecting device
CN111981003A (en) * 2020-08-19 2020-11-24 徐燕 Novel anti-drop threaded connection rod
DE102022214026A1 (en) * 2022-12-20 2024-06-20 Aktiebolaget Skf Rolling bearings with seals and flushing channel

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EP0079480A1 (en) * 1981-11-05 1983-05-25 Howaldtswerke-Deutsche Werft Ag Sealing assembly with a radial slip-ring
GB2174156A (en) * 1985-03-22 1986-10-29 Ross Ind Gmbh A stern-tube seal

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GB1389832A (en) * 1971-03-18 1975-04-09 Aeroquip Ltd Seal assemblies
JPS50106397A (en) * 1974-01-29 1975-08-21
JPS5743058A (en) * 1980-08-27 1982-03-10 Eagle Ind Co Ltd Stern tube shaft sealing device
DE3213392A1 (en) * 1981-04-13 1982-11-04 Howaldtswerke-Deutsche Werft Ag Hamburg Und Kiel, 2300 Kiel Sealing system for a leakproof stern-tube seal
DE3122407A1 (en) * 1981-06-05 1982-12-23 Howaldtswerke-Deutsche Werft Ag Hamburg Und Kiel, 2300 Kiel Lubricating system, in particular for a rear stern tube seal
DE3502395A1 (en) * 1985-01-25 1986-07-31 Howaldtswerke - Deutsche Werft AG Hamburg und Kiel, 2300 Kiel SEALING ARRANGEMENT FOR A PROPELLER SHAFT
GB2174150B (en) * 1985-04-26 1988-12-21 Japan Crystal Ind Air pump

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0079480A1 (en) * 1981-11-05 1983-05-25 Howaldtswerke-Deutsche Werft Ag Sealing assembly with a radial slip-ring
GB2174156A (en) * 1985-03-22 1986-10-29 Ross Ind Gmbh A stern-tube seal

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2252597B (en) * 1991-02-06 1994-08-10 Cocksedge Eng Ltd Improvements in roller assemblies
GB2252597A (en) * 1991-02-06 1992-08-12 Cocksedge Eng Ltd Seals for roller assemblies
WO1999030124A1 (en) * 1997-12-09 1999-06-17 Cromar Sales And Service Limited The testing of the integrity of a fluid coupling
GB2337602A (en) * 1997-12-09 1999-11-24 Cromar Sales And Service Limit The testing of the integrity of a fluid coupling
GB2448930A (en) * 2007-05-04 2008-11-05 Flybrid Systems Llp Seal for a high speed shaft
GB2448930B (en) * 2007-05-04 2009-08-19 Flybrid Systems Llp High speed flywheel seal
US8234953B2 (en) 2007-05-17 2012-08-07 Flybrid Systems Llp High speed flywheel containment
WO2010064001A2 (en) * 2008-12-04 2010-06-10 Schlumberger Holdings Limited Sealing glands and methods of use
WO2010064001A3 (en) * 2008-12-04 2010-09-10 Schlumberger Holdings Limited Sealing unit
US8376366B2 (en) 2008-12-04 2013-02-19 Schlumberger Technology Corporation Sealing gland and methods of use
US9447883B2 (en) 2011-04-11 2016-09-20 Blohm + Voss Industries Gmbh Seal for sealing shafts
US9410627B2 (en) 2012-05-12 2016-08-09 Blohm + Voss Industries Gmbh Seal arrangement with improved shaft bushing for a rotating ship propeller shaft
US9404582B2 (en) 2012-08-18 2016-08-02 Blohm + Voss Industries Gmbh Seal arrangement for a rotating ship propeller shaft
US9233745B2 (en) 2013-05-22 2016-01-12 Skf Blohm + Voss Industries Gmbh Seal apparatus for a ship propeller shaft and method of making the apparatus
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Also Published As

Publication number Publication date
DE3742079C2 (en) 1994-05-11
NL192828C (en) 1998-03-04
CN1035876A (en) 1989-09-27
NL8803033A (en) 1989-07-03
JP2599983B2 (en) 1997-04-16
GB2213539B (en) 1991-12-11
JPH01195199A (en) 1989-08-07
NL192828B (en) 1997-11-03
KR0142103B1 (en) 1998-07-15
AU608393B2 (en) 1991-03-28
KR890009722A (en) 1989-08-03
SE501926C2 (en) 1995-06-19
GB8828437D0 (en) 1989-01-05
SE8804471L (en) 1989-06-12
SE8804471D0 (en) 1988-12-09
CN1010796B (en) 1990-12-12
AU2664588A (en) 1989-06-15
DE3742079A1 (en) 1989-06-22

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