EP1501723B1 - Anordnung in verbindung mit einem propeller mit winkelförmig einstellbaren blättern - Google Patents

Anordnung in verbindung mit einem propeller mit winkelförmig einstellbaren blättern Download PDF

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Publication number
EP1501723B1
EP1501723B1 EP03725946A EP03725946A EP1501723B1 EP 1501723 B1 EP1501723 B1 EP 1501723B1 EP 03725946 A EP03725946 A EP 03725946A EP 03725946 A EP03725946 A EP 03725946A EP 1501723 B1 EP1501723 B1 EP 1501723B1
Authority
EP
European Patent Office
Prior art keywords
lubricant
propeller
propeller boss
boss
duct
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
EP03725946A
Other languages
English (en)
French (fr)
Other versions
EP1501723A1 (de
Inventor
Björn SVENSSON
Conny Thyberg
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.)
Nya Berg Propulsion AB
Original Assignee
Nya Berg Propulsion AB
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 Nya Berg Propulsion AB filed Critical Nya Berg Propulsion AB
Publication of EP1501723A1 publication Critical patent/EP1501723A1/de
Application granted granted Critical
Publication of EP1501723B1 publication Critical patent/EP1501723B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/38—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
    • B63H21/386—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like for handling lubrication liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H3/00—Propeller-blade pitch changing
    • B63H3/02—Propeller-blade pitch changing actuated by control element coaxial with propeller shaft, e.g. the control element being rotary
    • B63H3/04—Propeller-blade pitch changing actuated by control element coaxial with propeller shaft, e.g. the control element being rotary the control element being reciprocatable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H3/00—Propeller-blade pitch changing
    • B63H3/06—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical
    • B63H3/08—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical fluid

Definitions

  • the invention relates to an arrangement for an adjustable propeller for vessels comprising a propeller and a drive shaft extending through the hull, at least two propeller blades which are each mounted rotatably in a respective bearing seat, a propeller boss, a supply duct arranged in the said propeller boss for supplying lubricant to the said bearing seat, and a cavity for accommodating the lubricant.
  • the invention also relates to a method for lubricating a bearing seat in an arrangement for an adjustable propeller for vessels, lubricant being supplied to the bearing seat through a duct to a cavity in the propeller boss.
  • Construction solutions with adjustable propellers for vessels have been developed in order for it to be possible better to adapt the speed of the engine to the speed at which the vessel is to proceed at the same time as good manoeuvrability is obtained.
  • Seals are arranged around the openings in the bearing housings in order to ensure that water does not leak into the bearing housings and that lubricant does not leak out. If a seal should fail or a leak should occur for some other reason and water finds its way into the lubricant, it will lubricate the moving parts less effectively, resulting in increased wear, corrosion and fatigue failure of non-stainless materials. Experience has shown that oil leaks out and water penetrates at the same time when the seals or the bearing seats have become worn.
  • the bearing housings In order to reduce the consequences of water leaking into the lubricant, the bearing housings have been provided with an inlet duct for lubricant, which is connected to a gravitation tank containing lubricant. In the event of leakage occurring, new lubricant will be added by means of the gravitation from the tank of lubricant. This counteracts the system being filled with water.
  • US 6,042,337 disclose a sealing system for a hydraulic machine which comprises a runner or a rotor with a hub body and blades which are rotably journalled in oil lubricated bearings.
  • the hub comprises a body chamber which is arranged with a limited amount of oil, just enough so that upon rotation of the runner or rotor, the oil is pressed against the hub wall.
  • the abovementioned problems are solved by the invention by virtue of the fact that the cavity in the propeller boss is completely filled with lubricant which is under positive pressure, and that the propeller boss also comprises an outlet duct for return flow of the said lubricant from the said bearing seat in the propeller boss out through the propeller boss, the ducts being interconnected so that circulation of lubricant through the propeller boss is brought about.
  • the outlet duct is arranged in the drive shaft. It is possible within the scope of the invention, however, to arrange the duct elsewhere.
  • the inlet duct is preferably also arranged in the drive shaft. Both the inlet duct and the outlet duct can, for example, be arranged on the outside of the drive shaft.
  • the circulation system comprises a measuring device for measuring the state of the lubricant.
  • This state measurement can involve, for example, measuring the water content of the lubricant.
  • a device for regenerating the lubricant is connected to the circulation system.
  • a method according to the invention is characterized in that measurement of the state of the lubricant is performed between the lubricant having left the bearing housing and it being supplied to the bearing housing.
  • the state measured can be, for example, the moisture content of the lubricant. In this way, the state of the lubricant can be measured continuously, and measures can be taken before there has been any effect on the parts to be lubricated.
  • the lubricant is regenerated between it having left the bearing housing via the drive shaft and it being returned to the bearing housing. Continued operation of the vessel is made possible by the circulation step and the regeneration step incorporated therein.
  • FIG. 1 shows a general illustration of a vessel propeller 22 arranged on a hull 23 and its drive 24.
  • the propeller 22 comprises a propeller boss 17 and propeller blades 25.
  • the driving of the propeller 22 is effected by means of an engine 26, via a gear 27, and a drive shaft 20.
  • the drive shaft 20 is arranged essentially horizontally in the vessel.
  • Figure 2 shows a circulation arrangement for an adjustable propeller according to the invention.
  • the propeller boss 17 is lubricated by a lubricant.
  • the flow direction of the lubricant is shown by arrows in Figure 2 .
  • the flow direction of the hydraulic fluid is shown in the same way by arrows in Figures 2 and 3 .
  • the hydraulic system and the lubrication system are interconnected. Lubricant and hydraulic fluid consequently consist of the same medium. It is possible within the scope of the invention, however, to design the lubricant and hydraulic fluid systems as separate systems. Not all the parts of the hydraulic system are illustrated in the figure, as the hydraulic system is not the subject of the invention.
  • the arrangement comprises a first tank 1 for lubricant, and a conveying line 2 for conveying lubricant for a propeller boss 17 (shown in Figure 3 ).
  • a pressure oil box 4 distributes lubricant to the boss 17.
  • the lubricant usually used is oil, for example mineral oil, synthetic oil or vegetable oil, or another liquid suitable for the purpose.
  • the conveying line 2 leads to a pipe connection 3 on the pressure oil box 4 for the lubricant.
  • the pipe connection is connected to an inlet duct 5.
  • the inlet duct 5 then leads to a cavity 21 (shown in Figure 3 ) where the moving parts of the boss are located.
  • the whole boss that is to say the whole cavity 21, is filled with lubricant.
  • the volume of lubricant in the boss will vary slightly with the inward and outward movement in the cavity 21 performed by the piston rod 31 of the hydraulic system.
  • the lubricant is returned through an outlet duct 6 which, at its outer end, is connected to a second conveying line 7 for return flow of lubricant.
  • Both the inlet duct 5 and the outlet duct 6 are arranged in a gear shaft 18 and a drive shaft 20.
  • the second conveying line 7 is connected to a second tank 8.
  • the second tank is a reservoir for oil for the hydraulic system of the arrangement.
  • the first tank 1 and the second tank 8 are interconnected to form a circulation system.
  • the first tank 1 is located higher than the second tank 8. In this way, circulation driven by gravitation is brought about in the system. Lubricant flows out from the first tank 1 for lubrication in the boss 17.
  • the lubricant flows back to the second tank 8.
  • a level monitor (not shown in figure) arranged in the first tank 1 senses when the level in the tank 1 is too low.
  • a pump 9 is then started, which pumps lubricant from the second tank 8 to the first tank 1.
  • the circulation according to the invention can be arranged in ways other than the two-tank system described. For example, it can be driven by a pump.
  • the circulation system is driven under positive pressure, that is to say the pressure of the lubricant is higher than the surrounding water pressure. This is in order to reduce the risks of water leaking into the lubricant circulation system.
  • a measuring device 10 for measuring the moisture content of the lubricant.
  • the measuring device can be connected to a display in conjunction with the circulation system or a display on the bridge.
  • the measuring device 10 is a moisture content meter of the HMP228 type from Vaisala. This measuring device measures how the capacitance of a polymer film changes when it takes up water. It is also possible for other measuring methods for moisture content measurement to be used in connection with the circulation system. It is also possible to connect other measuring devices to the system, which measure states of the lubricant other than the moisture content. It is also possible to connect regeneration devices to the circulation system in order to restore the lubricant, for example by virtue of the moisture content being reduced.
  • a regeneration device 36 is suitably arranged in conjunction with the second tank 8.
  • Figure 2 also shows a forward pitch duct 11 and a backward pitch duct 12 for conveying hydraulic fluid to the hydraulic system which controls the pitch angle of the propeller blades.
  • the hydraulic fluid is conveyed to a forward pitch inlet 13 for inlet and outlet of hydraulic fluid and a backward pitch inlet 14, arranged close to the forward pitch inlet 13, for inlet and outlet of hydraulic fluid.
  • the hydraulic system functions in such a way that hydraulic fluid is pumped into the forward pitch inlet and through the forward pitch duct 11 when the speed of the vessel is to be increased or when operation is to be changed from backward operation to forward operation.
  • Hydraulic fluid is pumped into the backward pitch inlet 14 and through the backward pitch duct 12 when the speed of the vessel is to be reduced or forward operation is to be changed to backward operation.
  • Figure 2 also shows a gear shaft 18 and a flange 19 against the gear. The arrangement changes the speed of the engine of the vessel to the speed desired for operation of the propeller.
  • FIG 3 shows a detail of the circulation system in the boss 17.
  • the cavity 21 is seen here.
  • a hydraulic servo 28 for the adjustability of the propeller.
  • the hydraulic servo 28 comprises a piston 29, a chamber for forward pitch 15 and a chamber for backward pitch 16.
  • the hydraulic system is described below with reference to Figures 2 and 3 .
  • a hydraulic unit 30 is connected to the forward pitch inlet 13 and the backward pitch inlet 14.
  • the hydraulic unit 30 is constructed according to known art.
  • the hydraulic unit 30 is controlled from the bridge or elsewhere in the vessel so as to pump the hydraulic fluid to and from the forward pitch inlet 13 and the backward pitch inlet 14.
  • the hydraulic fluid is conveyed through the forward pitch duct 11 and the backward pitch duct 12 through the gear shaft 18 and the drive shaft 20 to the propeller boss 17.
  • the forward pitch duct 11 opens centrally into the forward pitch chamber 15.
  • the backward pitch duct 12 runs out through a hole in a piston rod 31 arranged in the drive shaft 20, so that the hydraulic fluid flows out into the backward pitch chamber 16.
  • the piston 29 is made to move axially in one or other direction.
  • the direction of movement of the piston is marked in Figure 3 by a double arrow.
  • FIG. 4 shows another detail of the circulation system in the boss 17 according to the invention.
  • the inlet duct 5 for the lubricant arranged in the piston rod 31 in the boss 17, is shown in detail.
  • a piston rod head 37 Arranged on the piston rod is a piston rod head 37.
  • a groove 32 is arranged in the piston rod head.
  • Four such grooves are arranged in the piston rod head 37, one for each propeller blade 25.
  • a blade block 33 runs in each of these grooves.
  • the blade block 33 is moved axially by means of the groove 32.
  • a crank pin ring 38 Arranged in conjunction with the blade block 33.
  • a pin 34 is present as part of the crank pin ring 38.
  • the blade block 33 is mounted movably on the pin 34, which is connected firmly to the screws 35 which are arranged on the outside of the boss 17 and is in this way also connected firmly to the propeller blade 25.
  • the pin 34 moves in a radius and brings about rotation of the propeller blade 25.
  • the crank pin ring 38 and the propeller blade 25 are arranged rotatably in a bearing seat 39.
  • FIG. 5 shows another detail of the circulation system in the boss 17 according to the invention.
  • the outlet duct 6 for lubricant also arranged in the drive shaft 20, is seen

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • General Details Of Gearings (AREA)
  • Breeding Of Plants And Reproduction By Means Of Culturing (AREA)
  • Sliding-Contact Bearings (AREA)
  • Harvester Elements (AREA)
  • Catching Or Destruction (AREA)

Claims (10)

  1. Anordnung für eine einstellbare Schiffsschraube, umfassend eine Schraube (22) und eine sich durch den Rumpf erstreckende Antriebswelle (20), zumindest zwei Schraubenblätter (25), die jeweils in einem entsprechenden Lagersitz drehbar befestigt sind, eine Schraubennabe (17), einen in der Schraubennabe (17) angeordneten Zuführkanal (5) zum Zuführen eines Schmiermittels zum Sitz, und einen Hohlraum (21) zum Aufnehmen des Schmiermittels,
    dadurch gekennzeichnet, dass
    der gesamte Hohlraum (21) mittels einer Schmiermittel-Bedruckungsquelle (4) unter einem positiven Druck befüllt werden kann, und dadurch, dass die Schraubennabe (17) ebenso einen Auslasskanal (6) für einen Rückführstrom des Schmiermittels vom Lagersitz in der Schraubennabe (17) heraus durch die Schraubennabe (17) umfasst, wobei die Kanäle (5, 6) außerhalb der Nabe (17) derart gekoppelt sind, dass eine Zirkulation des Schmiermittels durch die Schraubennabe (17) herbeigeführt wird.
  2. Anordnung gemäß Anspruch 1, dadurch gekennzeichnet, dass der Auslaßkanal (6) in der Antriebswelle (20) angeordnet ist.
  3. Anordnung gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Einlasskanal (5) in der Antriebswelle (20) angeordnet ist.
  4. Anordnung gemäß einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass das Zirkulationssystem eine Messvorrichtung (10) zum Messen des Zustands des Schmiermittels umfasst.
  5. Anordnung gemäß Anspruch 4, dadurch gekennzeichnet, dass der durch die Messvorrichtung (10) gemessene Zustand der Feuchtigkeitsgehalt des Schmiermittels ist.
  6. Anordnung gemäß einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass das Zirkulationssystem eine Vorrichtung zum Regenerieren (36) des Schmiermittels umfasst.
  7. Verfahren zum Schmieren einer Schraubennabe (17) in einer Anordnung für eine einstellbare Schiffsschraube, wobei ein Schmiermittel durch einen Zuführkanal (5) zu einem Hohlraum (21) in der Schraubennabe (17) zugeführt wird, gekennzeichnet durch:
    Befüllen des gesamten Hohlraumes (21) mit Schmiermittel mittels einer Schmiermittel-Bedruckungsquelle (4) unter einem positiven Druck,
    Wegführen des Schmiermittels von der Schraubennabe (17) durch einen Kanal (6), und
    Zirkulieren des Schmiermittels zurück zur Schraubennabe (17) .
  8. Verfahren zum Schmieren einer Schraubennabe (17) gemäß Anspruch 7, dadurch gekennzeichnet, dass eine Messung des Zustands des Schmiermittels ausgeführt wird, nachdem das Schmiermittel die Schraubennabe (17) verlassen hat und bevor es zur Schraubennabe (17) zugeführt wird.
  9. Verfahren zum Schmieren einer Schraubennabe (17) gemäß Anspruch 8, dadurch gekennzeichnet, dass der gemessene Zustand der Wassergehalt des Schmiermittels ist.
  10. Verfahren zum Schmieren einer Schraubennabe (17) gemäß einem der Ansprüche 7-9, dadurch gekennzeichnet, dass das Schmiermittel regeneriert wird, nachdem das Schmiermittel die Schraubennabe (17) verlassen hat und bevor es zur Schraubennabe (17) zugeführt wird.
EP03725946A 2002-05-08 2003-05-08 Anordnung in verbindung mit einem propeller mit winkelförmig einstellbaren blättern Expired - Lifetime EP1501723B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE0201384 2002-05-08
SE0201384A SE0201384D0 (sv) 2002-05-08 2002-05-08 Ett arrangemang vid en ställbar propeller
PCT/SE2003/000748 WO2003095303A1 (en) 2002-05-08 2003-05-08 Arrangement in connection with a propeller with angularly adjustable blades

Publications (2)

Publication Number Publication Date
EP1501723A1 EP1501723A1 (de) 2005-02-02
EP1501723B1 true EP1501723B1 (de) 2010-07-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP03725946A Expired - Lifetime EP1501723B1 (de) 2002-05-08 2003-05-08 Anordnung in verbindung mit einem propeller mit winkelförmig einstellbaren blättern

Country Status (7)

Country Link
EP (1) EP1501723B1 (de)
AT (1) ATE473159T1 (de)
AU (1) AU2003231452A1 (de)
DE (1) DE60333274D1 (de)
NO (1) NO20045160L (de)
SE (1) SE0201384D0 (de)
WO (1) WO2003095303A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110645133A (zh) * 2018-06-27 2020-01-03 丁明山 水轮发电机

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE506370C2 (sv) * 1996-04-29 1997-12-08 Kvaerner Turbin Ab Tätningssystem vid hydraulmaskin

Also Published As

Publication number Publication date
EP1501723A1 (de) 2005-02-02
AU2003231452A1 (en) 2003-11-11
DE60333274D1 (de) 2010-08-19
WO2003095303A1 (en) 2003-11-20
ATE473159T1 (de) 2010-07-15
NO20045160L (no) 2005-02-04
SE0201384D0 (sv) 2002-05-08

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