EP0258706B1 - Anti-fouling method and device for variable-pitch propeller rods for water craft - Google Patents

Anti-fouling method and device for variable-pitch propeller rods for water craft Download PDF

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Publication number
EP0258706B1
EP0258706B1 EP87111745A EP87111745A EP0258706B1 EP 0258706 B1 EP0258706 B1 EP 0258706B1 EP 87111745 A EP87111745 A EP 87111745A EP 87111745 A EP87111745 A EP 87111745A EP 0258706 B1 EP0258706 B1 EP 0258706B1
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EP
European Patent Office
Prior art keywords
propeller
thrust
rods
linkage
piston
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EP87111745A
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German (de)
French (fr)
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EP0258706A1 (en
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Peter Müller
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    • 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
    • B63H3/10—Propeller-blade pitch changing characterised by having pitch control conjoint with propulsion plant control

Definitions

  • the invention relates to a method for preventing the attachment of foreign bodies to parts of a push rod linkage for the adjustment of the blades of an adjustable propeller, which is provided for driving a watercraft driven by a motor, the push rods of the push rod linkage via one of the rotating and the displaceable, not rotating part of the push rod linkage connecting rotary-sliding coupling are adjustable by means of an adjusting linkage, and a device for performing this method.
  • Variable pitch propellers for watercraft are known in various designs.
  • adjustable propellers for large watercraft i.e. in the case of high-performance ship drives
  • the adjustment rods of the individual propeller blades are accommodated in the hub of the adjustable propeller.
  • the adjusting rods are actuated here by a push rod which is arranged in the center of a hollow drive shaft and carries at its end an adjusting flange on which the adjusting rods are supported.
  • the push rod is actuated here by a hydraulic linear motor consisting of cylinder and piston, which is either installed in the drive shaft or via an adjusting linkage the push rod is connected, see U.S. Patent 3,095,932.
  • variable-pitch propellers are also used, but in this case the propeller blades are adjusted via a mechanical lever linkage by means of a hydraulic linear motor, see US Pat. No. 4,599,043 by the same inventor or by means of a manual actuation, see US Pat. No. 2,742 097.
  • variable pitch propellers for watercraft is the phenomenon that foreign bodies, in particular small shells, are deposited on the moving parts of the variable linkage, which can hinder or even block the adjusting movements of the propeller. This applies especially to the push rods of the push rod linkage for the adjustment of the propeller blades, of which parts occasionally come into contact with the water depending on the adjustment position of the propeller blades, see e.g. the aforementioned US Pat. No. 4,599,043. In FIG.
  • This object is achieved according to the invention in that the push rods are moved into a protective position immediately after the engine is switched off, in which the push rods are no longer exposed to foreign bodies, while when the engine is started the push rods are in a neutral position of the propeller blades corresponding position can be moved.
  • This ensures that the desired protective effect is achieved without special protective measures by supplying the parts of the adjustment linkage in the hub or in the bearing housing that are in the water when the watercraft is not in operation, without a special seal having to be provided for this, but rather through prevention access to these parts is prevented.
  • the taking of the protective position when the watercraft is not in operation and the neutral position when the watercraft engine starts can be set manually or automatically.
  • the invention also includes a device with which the method can be carried out optimally.
  • This object is achieved according to the invention in that a bearing housing connected to the hub for rotatably receiving the blade root is provided on the hub of the adjustable propeller for each propeller blade, in which a push rod is slidably mounted with an adjusting pin engaging in the blade root, in which an end position of the push rod stroke, the free end connected to the rotary / sliding coupling of the push rods is completely immersed in the bearing housing and sealed to the outside. It is thereby achieved that the foreign body and mussel infestation on parts in the water can only be prevented by the design of the bearing housing.
  • 1 denotes an adjustable propeller, which has adjustable propeller blades 2 and a propeller hub 4 driven by a drive shaft 3.
  • the drive shaft 3 is driven by a drive machine 5 and is mounted in a bearing 6 located near the propeller 1.
  • the pitch of the propeller blades 2 is adjusted by a lever linkage 7, the main part of which is a two-armed adjusting lever 8, the pivot axis 9 of which is pivotally supported in a support bearing 10.
  • the support bearing 10 is mounted either on the hull of the watercraft or, if the variable-pitch propeller 1 is arranged on the rudder, on a part of this rudder.
  • the adjusting lever 8 has an upper and a lower arm 11, 12, the upper arm 11 being coupled via a joint 13 to the bumper 14 of a linear motor 15 driven by a power source 29, while the lower arm 12 is coupled via joints 22, 23 a rotary slide clutch 21 is connected.
  • the rotary / sliding coupling 21 has a non-rotating steep 17, which is connected to the lower arm 12 via the joints 22, 23, while the rotating coupling part 19 is fastened to the drive shaft 3 and via radial and axial bearings (only one Bearing 18 shown schematically) carries the non-rotating coupling part 17.
  • Push rods 20 are supported on the flange 24 of the rotating coupling part 19, which are guided in the propeller hub 4 and adjust the individual propeller blades 2 at the same time.
  • the propeller hub 4 and the rotary / sliding coupling 21 are surrounded by a hood 25.
  • FIG. 2 and 3 show that part of the drive according to FIG. 1 in which the solution according to the invention is implemented.
  • the same reference symbols as in FIG. 1 mean the same parts.
  • the propeller hub 4 is formed in several parts by the propeller blade 2 being mounted together with the push rod 20 in a bearing housing 26 which is fixedly connected to the propeller hub 4. But it is also possible to design the propeller hub 4 and the bearing housing 26 as a single piece. As can be seen from Fig. 4, three bearing housings .26 are arranged corresponding to three propeller blades 2.
  • the push rods 20 have an adjusting pin 27 which projects into an adjusting disk 28 with an adjusting groove.
  • the adjusting disk 28 is connected to the blade root 30 of the propeller blade 2 and forms the holder for the propeller blade 2.
  • Each push rod 20 has a piston 31, 32 with a seal 33 at its ends.
  • the pistons 31, 32 are guided in cylinder bores 34, 35 which open into an interior 36 of the bearing housing 26.
  • the interior 36 forms, together with the two cylinder bores 34, 35, a space which is closed by the pistons 31, 32 and has a constant volume which is expediently combined with a lubricant, e.g. Grease is filled and can therefore not be influenced by external influences.
  • a lubricant e.g. Grease
  • a connecting rod 37 extends from the piston 31, the free end of which is fixedly connected by means of a screw 41 to the flange 24 of the rotating part 19 of the rotary slide clutch 21, which flange is expediently triangular.
  • the rotating part is covered by the hood-shaped, displaceable, non-rotating part 17 of the rotary-sliding coupling 21, radial and axial bearings (not visible) being arranged between the two parts 17, 19, via which the adjusting forces of the adjusting linkage 7 on the Push rod linkage are transmitted.
  • the cylinder bores 34 are covered by a screw cap 42, in the center of which a bore 43 with a seal 44 is provided for the passage of the connecting rod 37.
  • the adjustment linkage 7 is connected via a yoke 46, see FIG. 4, and a bracket 45 via a joint 22.
  • the bracket 45 has the tabs 16, which are connected via links 23 to webs 47 of the displaceable, non-rotating part of the rotary / sliding coupling.
  • Through the passage 53 formed by the bracket 45 and the yoke 46 it is also possible to arrange the rotary / sliding coupling with the adjusting linkage 7 not only on the outlet side as in FIGS. 2 and 3, but also on the inlet side of the adjustable propeller 1.
  • the propeller blade 2 is connected to the blade root or the adjusting disk 28, see FIGS. 2 and 3, by means of screws 50.
  • a screw plug 51 gives access to a filler screw 52, the removal of which makes the closed interior 36 accessible.
  • the cylinder bore 34 with the cap 42 makes it possible to provide protection for the connecting rod 37 without additional means being required.
  • the invention is based on the consideration that the foreign body infestation can cause malfunctions if it forms on the connecting rod 37.
  • the mussels that sit there are very hard and can hardly be removed.
  • the connecting rod 37 is kept in a dark room, in the present case in the cylinder bore 34, no foreign body infection occurs.
  • the same also applies essentially to the cylinder bore 35 when the push rod is in the position shown in FIG. 3. If the push rods 20 are brought into the position shown in FIG. 2 when the watercraft is at a standstill, on the one hand the cylinder bore 34 is closed by the seal 44 and the connecting rod 37, while the cylinder bore 35 is completed by the piston 32. If this position of the push rods 20 is assumed each time the watercraft comes to a standstill, foreign matter on the connecting rod 37 is reliably avoided, as is in the cylinder bore 35.
  • this protective position is reliably taken, it can be effected automatically.
  • the adjustment linkage 7 is actuated by a hydraulic linear motor which is designed as a differential piston, in which a spring is installed in the cylinder space with the smaller area, which, when there is no pressure, presses the piston into the position corresponding to the position shown in FIG.
  • the medium pressure pushes the piston into a specific neutral position for idling.
  • the automatic maintenance of the protective position and the neutral position of the push rods can also be done in another way, e.g. through relays that interact with limit switches and stop the linear motor in the desired positions.

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Transmission Devices (AREA)
  • Motor Power Transmission Devices (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Hydraulic Turbines (AREA)

Description

Die Erfindung betrifft ein Verfahren zur Verhinderung des Ansetzens von Fremdkörpern an Teilen eines Schubstangengestänges für die Verstellung der Schaufeln eines Verstellpropellers, welcher für den Antrieb eines von einem Motor angetriebenen Wasserfahrzeug vorgesehen ist, wobei die Schubstangen des Schubstangengestänges über eine den rotierenden und den verschiebbaren, nicht rotierenden Teil des Schubstangengestänges miteinander verbindende Dreh-Schiebe-Kupplung mittels eines Verstellgestänges verstellbar sind, und eine Vorrichtung zur Durchführung dieses Verfahrens.The invention relates to a method for preventing the attachment of foreign bodies to parts of a push rod linkage for the adjustment of the blades of an adjustable propeller, which is provided for driving a watercraft driven by a motor, the push rods of the push rod linkage via one of the rotating and the displaceable, not rotating part of the push rod linkage connecting rotary-sliding coupling are adjustable by means of an adjusting linkage, and a device for performing this method.

Verstellpropeller für Wasserfahrzeuge sind in verschiedenen Ausführungen bekannt. Bei Verstellpropellem für grosse Wasserfahrzeuge, d.h. bei Schiffsantrieben grosser Leistung, sind die Verstellgestänge der einzelnen Propellerschaufeln in der Nabe des Verstellpropellers untergebracht. Die Verstellgestänge werden hierbei durch eine Schubstange betätigt, welche im Zentrum einer hohlen Antriebswelle angeordnet ist und an ihrem Ende einen Verstellflansch trägt, an welchem die Verstellgestänge abgestützt sind.Variable pitch propellers for watercraft are known in various designs. With adjustable propellers for large watercraft, i.e. in the case of high-performance ship drives, the adjustment rods of the individual propeller blades are accommodated in the hub of the adjustable propeller. The adjusting rods are actuated here by a push rod which is arranged in the center of a hollow drive shaft and carries at its end an adjusting flange on which the adjusting rods are supported.

Siehe hierzu den Artikel von J. Wind, Principles of mechanisms used in controllable pitch propellers", insbesondere Figur 8. Die Schubstange wird hierbei durch einen aus Zylinder und Kolben bestehenden Hydraulik-Linearmotor betätigt, welcher entweder in der Antriebswelle eingebaut oder über ein Verstellgestänge mit der Schubstange verbunden ist, siehe US-PS 3 095 932.See in this regard the article by J. Wind, Principles of mechanisms used in controllable pitch propellers ", in particular FIG. 8. The push rod is actuated here by a hydraulic linear motor consisting of cylinder and piston, which is either installed in the drive shaft or via an adjusting linkage the push rod is connected, see U.S. Patent 3,095,932.

Bei kleineren Wasserfahrzeugen mit entsprechend kleinerer Antriebsleistung werden zwar ebenfalls Verstellpropeller verwendet, doch erfolgt hierbei die Verstellung der Propellerschaufeln über ein mechanisches Hebelgestänge mittels eines Hydraulik-Linearmotors, siehe US-PS 4 599 043 desselben Erfinders oder mittels einer Handbetätigung, siehe US-PS 2 742 097.In the case of smaller watercraft with a correspondingly lower propulsion power, variable-pitch propellers are also used, but in this case the propeller blades are adjusted via a mechanical lever linkage by means of a hydraulic linear motor, see US Pat. No. 4,599,043 by the same inventor or by means of a manual actuation, see US Pat. No. 2,742 097.

Ein wesentliches Problem bei Verstellpropellern für Wasserfahrzeuge ist die Erscheinung, dass an den beweglichen Teilen der Verstellgestänge Fremdkörper, insbesondere kleine Muscheln, abgelagert werden, welche die Verstellbewegungen des Propellers behindern oder sogar blockieren können. Dies betrifft vor allem die Schubstangen der Schubstangengestänge für die Verstellung der Propellerschaufeln, von welchen Teile je nach der Verstellposition der Propellerschaufeln zeitweise mit dem Wasser in Berührung kommen, siehe z.B. die erwähnte US-PS 4 599 043. In Figur 1 dieser Patentschrift ist ein Verstellantrieb für die Schaufeln eines Verstellpropelllers beschrieben, dessen Schubstangen an ihrem freien Ende mit einer Dreh-Schiebe-Kupplung verbunden ist, welche die Verbindung zwischen dem rotierenden und dem verschiebbaren, nicht rotierenden Teil des Schubstangengestänges gemäß dem Oberbegriff des A1 bildet. Die Dreh-Schiebe-Kupplung ist vom Wasser umgeben und dasselbe trifft auch für das freie Ende der Schubstangen der in der rotierenden Propellernabe liegenden Schubstangen zu. Zwar ist es bekannt, bewegliche Teile, welche gegen Umwelteinflüsse geschützt werden müssen, mit Balgdichtungen zu versehen. Diese weisen jedoch den Nachteil auf, dass sie zusätzlichen Platz für ihren Einbau benötigen und verhältnismässig empfindlich bezüglich einer Beschädigung sind. Aehnliche Verhältnisse liegen auch bei Trimmzylindern von Sportbooten vor. Dort werden mit Abstreifringen aus Stahl Kolbenstangen von Fremdkörperbefall gereinigt. Nachteilig ist jedoch, dass dadurch der Schubkraftbedarf vergrössert wird, ohne jedoch damit eine vollständige Säuberung zu erreichen.A major problem with variable pitch propellers for watercraft is the phenomenon that foreign bodies, in particular small shells, are deposited on the moving parts of the variable linkage, which can hinder or even block the adjusting movements of the propeller. This applies especially to the push rods of the push rod linkage for the adjustment of the propeller blades, of which parts occasionally come into contact with the water depending on the adjustment position of the propeller blades, see e.g. the aforementioned US Pat. No. 4,599,043. In FIG. 1 of this patent specification, an adjusting drive for the blades of an adjusting propeller is described, the push rods of which are connected at their free end to a rotary-sliding coupling, which connects the rotating and the displaceable, forms non-rotating part of the push rod linkage according to the preamble of A1. The twist-slide coupling is surrounded by water and the same applies to the free end of the push rods of the push rods located in the rotating propeller hub. It is known to provide moving parts, which have to be protected against environmental influences, with bellows seals. However, these have the disadvantage that they require additional space for their installation and are relatively sensitive to damage. Similar conditions also exist with trim cylinders of sports boats. Piston rods are cleaned of foreign bodies by means of steel scraper rings. However, it is disadvantageous that this increases the need for thrust, but without achieving a complete cleaning.

Hier setzt die Erfindung ein, der die Aufgabe zugrunde liegt, ein Verfahren zur Verhinderung des Ansetzens der erwähnten Fremdkörperteilen an ein Schubstangengestänge für Verstellpropeller so auszugestalten, dass ohne zusätzlichen Platzbedarf der Schutz von im Wasser liegenden Teilen des Schubstangengestänges mit einfachen Mitteln erreicht wird.This is where the invention begins, which is based on the object of designing a method for preventing the aforementioned foreign body parts from attaching to a push rod linkage for variable pitch propellers in such a way that the protection of parts of the push rod linkage lying in the water is achieved with simple means without requiring additional space.

Diese Aufgabe wird gemäss der Erfindung dadurch gelöst, dass unmittelbar nach dem Abstellen des Motors die Schubstangen in eine Schutzstellung bewegt werden, in welcher die Schubstangen dem Befall von Fremdkörpern nicht mehr ausgesetzt werden, während beim Start des Motors die Schubstangen in eine der Neutralstellung der Propellerblätter entsprechende Stellung bewegt werden. Damit wird erreicht, dass die gewünschte Schutzwirkung ohne besondere Schutzmassnahmen dadurch erreicht wird, dass bei Nichtbetrieb des Wasserfahrzeuges die im Wasser liegenden Teile des Verstellgestänges in der Nabe bzw. im Lagergehäuse versorgt werden, ohne dass eine besondere Dichtung hierzu vorgesehen werden müsste, sondern durch Verhinderung des Zuganges zu diesen Teilen verhindert wird.This object is achieved according to the invention in that the push rods are moved into a protective position immediately after the engine is switched off, in which the push rods are no longer exposed to foreign bodies, while when the engine is started the push rods are in a neutral position of the propeller blades corresponding position can be moved. This ensures that the desired protective effect is achieved without special protective measures by supplying the parts of the adjustment linkage in the hub or in the bearing housing that are in the water when the watercraft is not in operation, without a special seal having to be provided for this, but rather through prevention access to these parts is prevented.

Zweckmässig kann die Einnahme der Schutzstellung bei Nichtbetrieb des Wasserfahrzeuges und die Neutralstellung bei Start des Motors des Wasserfahrzeuges manuell oder selbsttätig eingestellt werden.Appropriately, the taking of the protective position when the watercraft is not in operation and the neutral position when the watercraft engine starts can be set manually or automatically.

Die Erfindung umfasst auch eine Vorrichtung, mit welcher das Verfahren optimal ausgeführt werden kann. Diese Aufgabe wird gemäss der Erfindung dadurch gelöst, dass an der Nabe des Verstellpropellers für jede Propellerschaufel ein mit der Nabe verbundenes Lagergehäuse zur drehbaren Aufnahme des Schaufelfusses vorgesehen ist, in welchem eine Schubstange mit einem in den Schaufelfuss eingreifenden Verstellzapfen verschiebbar gelagert ist, wobei in der einen Endlage des Schubstangenhubes das freie, mit der Dreh-Schiebe-Kupplung verbundene Ende der Schubstangen im Lagergehäuse vollständig eingetaucht und nach außen abgedichtet ist. Dadurch wird erreicht, dass lediglich durch die Ausbildung des Lagergehäuses der Fremdkörper- und Muschelbefall an im Wasser befindlichen Teilen verhindert werden kann.The invention also includes a device with which the method can be carried out optimally. This object is achieved according to the invention in that a bearing housing connected to the hub for rotatably receiving the blade root is provided on the hub of the adjustable propeller for each propeller blade, in which a push rod is slidably mounted with an adjusting pin engaging in the blade root, in which an end position of the push rod stroke, the free end connected to the rotary / sliding coupling of the push rods is completely immersed in the bearing housing and sealed to the outside. It is thereby achieved that the foreign body and mussel infestation on parts in the water can only be prevented by the design of the bearing housing.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt und nachfolgend beschrieben. Es zeigenIn the drawing, an embodiment of the invention is shown and described below. Show it

  • Fig. 1 eine schematische Darstellung eines Verstellpropellers für ein Wasserfahrzeug mit einer Verstellvorrichtung für das Verstellen der Steigung der Propellerschaufeln,Fig. 1 is a schematic representation of a variable pitch propeller for a watercraft with a Adjusting device for adjusting the pitch of the propeller blades,
  • Fig. 2 einen Längsschnitt der Nabe eines Verstellpropellers, bei dem die Schubstangen der Verstellvorrichtung sich in der einen Endlage des Schubstangenhubes befinden undFig. 2 is a longitudinal section of the hub of an adjusting propeller, in which the push rods of the adjusting device are in one end position of the push rod stroke and
  • Fig. 3 einen Längsschnitt der Nabe eines Verstellpropellers, bei dem die Schubstangen der Verstellvorrichtung sich in der anderen, der Endlage nach Figur 2 entgegengesetzten Endlage befinden und3 shows a longitudinal section of the hub of an adjusting propeller, in which the push rods of the adjusting device are in the other, opposite the end position according to FIG. 2, and
  • Fig. 4 einen Schnitt des Verstellgestänges.Fig. 4 shows a section of the adjustment linkage.

In dem in Figur 1 schematisch dargestellten Antrieb für ein Wasserfahrzeug ist mit 1 ein Verstellpropeller bezeichnet, welcher verstellbare Propellerschaufeln 2 und eine durch eine Antriebswelle 3 angetriebene Propellernabe 4 aufweist. Die Antriebswelle 3 ist von einer Antriebsmaschine 5 angetrieben und in einer in der Nähe des Propellers 1 liegenden Lagerung 6 gelagert. Die Verstellung der Steigung der Propellerschaufeln 2 erfolgt durch ein Hebelgestänge 7, dessen Hauptteil ein zweiarmiger Verstellhebel 8 ist, dessen Schwenkachse 9 in einem Stützlager 10 schwenkbar abgestützt ist. Das Stützlager 10 ist entweder am Rumpf des Wasserfahrzeuges oder wenn der Verstellpropeller 1 am Steuerruder angeordnet ist, an einem Teil dieses Steuerruders gelagert. Der Verstellhebel 8 weist einen oberen und einen unteren Arm 11, 12 auf, wobei der obere Arm 11 über ein Gelenk 13 mit der Stossstange 14 eines von einer Kraftquelle 29 angetriebenen Linearmotor 15 gekuppelt ist, während der untere Arm 12 über Gelenke 22, 23 mit einer Dreh-Schiebe-Kupplung 21 verbunden ist. Die Dreh-Schiebe-Kupplung 21 weist einen nicht rotierenden steil 17 auf, der über die Gelenke 22, 23 mit dem unteren Arm 12 verbunden ist, während der rotierende Kupplungsteil 19 auf der Antriebswelle 3 befestigt ist und über Radial- und Axiallager (nur ein Lager 18 schematisch dargestellt) den nicht rotierenden Kupplungsteil 17 trägt. An dem Flansch 24 des rotierenden Kupplungsteils 19 sind Schubstangen 20 abgestützt, welche in der Propellernabe 4 geführt sind und die einzelnen Propellerschaufeln 2 gleichzeitig verstellen. Die Propellernabe 4 und die Dreh-Schiebe-Kupplung 21 sind von einer Haube 25 umgeben.In the drive for a watercraft shown schematically in FIG. 1, 1 denotes an adjustable propeller, which has adjustable propeller blades 2 and a propeller hub 4 driven by a drive shaft 3. The drive shaft 3 is driven by a drive machine 5 and is mounted in a bearing 6 located near the propeller 1. The pitch of the propeller blades 2 is adjusted by a lever linkage 7, the main part of which is a two-armed adjusting lever 8, the pivot axis 9 of which is pivotally supported in a support bearing 10. The support bearing 10 is mounted either on the hull of the watercraft or, if the variable-pitch propeller 1 is arranged on the rudder, on a part of this rudder. The adjusting lever 8 has an upper and a lower arm 11, 12, the upper arm 11 being coupled via a joint 13 to the bumper 14 of a linear motor 15 driven by a power source 29, while the lower arm 12 is coupled via joints 22, 23 a rotary slide clutch 21 is connected. The rotary / sliding coupling 21 has a non-rotating steep 17, which is connected to the lower arm 12 via the joints 22, 23, while the rotating coupling part 19 is fastened to the drive shaft 3 and via radial and axial bearings (only one Bearing 18 shown schematically) carries the non-rotating coupling part 17. Push rods 20 are supported on the flange 24 of the rotating coupling part 19, which are guided in the propeller hub 4 and adjust the individual propeller blades 2 at the same time. The propeller hub 4 and the rotary / sliding coupling 21 are surrounded by a hood 25.

Fig. 2 und 3 zeigen denjenigen Teil des Antriebes nach Figur 1, in welchem die erfindungsgemässe Lösung verwirklicht ist. Hierin bedeuten gleiche Bezugszeichen wie in Fig. 1 dieselben Teile.2 and 3 show that part of the drive according to FIG. 1 in which the solution according to the invention is implemented. Here, the same reference symbols as in FIG. 1 mean the same parts.

In Fig. 2 und 3 ist die Propellernabe 4 mehrteilig ausgebildet, indem die Propellerschaufel 2 zusammen mit der Schubstange 20 in einem Lagergehäuse 26 gelagert sind, das mit der Propellernabe 4 fest verbunden ist. Es ist aber auch möglich, die Propellernabe 4 und die Lagergehäuse 26 als einziges Stück auszubilden. Wie aus Fig. 4 erkennbar ist, sind drei Lagergehäuse .26 entsprechend drei Propellerschaufeln 2 angeordnet. Die Schubstangen 20 weisen einen Verstellzapfen 27 auf, welcher in eine Verstellscheibe 28 mit einer Verstellnut ragt. Die Verstellscheibe 28 ist mit dem Schaufelfuss 30 der Propellerschaufel 2 verbunden und bildet die Halterung der Propellerschaufel 2.2 and 3, the propeller hub 4 is formed in several parts by the propeller blade 2 being mounted together with the push rod 20 in a bearing housing 26 which is fixedly connected to the propeller hub 4. But it is also possible to design the propeller hub 4 and the bearing housing 26 as a single piece. As can be seen from Fig. 4, three bearing housings .26 are arranged corresponding to three propeller blades 2. The push rods 20 have an adjusting pin 27 which projects into an adjusting disk 28 with an adjusting groove. The adjusting disk 28 is connected to the blade root 30 of the propeller blade 2 and forms the holder for the propeller blade 2.

Jede Schubstange 20 weist an ihren Enden je einen Kolben 31, 32 mit einer Dichtung 33 auf. Die Kolben 31, 32 sind in Zylinderbohrungen 34, 35 geführt, welche in einen Innenraum 36 des Lagergehäuses 26 münden. Der Innenraum 36 bildet zusammen mit den beiden Zylinderbohrung 34, 35 einen durch die Kolben 31, 32 geschlossenen Raum konstanten Volumens, der zweckmässig mit einem Schmiermittel, z.B. Schmierfett, gefüllt ist und somit durch Ausseneinflüsse nicht beeinflusst werden kann.Each push rod 20 has a piston 31, 32 with a seal 33 at its ends. The pistons 31, 32 are guided in cylinder bores 34, 35 which open into an interior 36 of the bearing housing 26. The interior 36 forms, together with the two cylinder bores 34, 35, a space which is closed by the pistons 31, 32 and has a constant volume which is expediently combined with a lubricant, e.g. Grease is filled and can therefore not be influenced by external influences.

Auf der Seite der Dreh-Schiebe-Kupplung 21 erstreckt sich vom Kolben 31 ein Verbindungsstab 37, dessen freies Ende mittels einer Schraube 41 mit dem, zweckmässig dreieckförmig ausgebildeten Flansch 24 des rotierenden Teils 19 der Dreh-Schiebe-Kupplung 21 fest verbunden ist. Der rotierende Teil wird vom haubenförmig ausgebildeten verschiebbaren, nicht rotierenden Teil 17 der Dreh-Schiebe-Kupplung 21 überdeckt, wobei zwischen den beiden Teilen 17,19 Radial- und Axiallager (nicht sichtbar) angeordnet sind, über welche die Verstellkräfte von Verstellgestänge 7 auf das Schubstangengestänge übertragen werden.On the side of the rotary slide clutch 21, a connecting rod 37 extends from the piston 31, the free end of which is fixedly connected by means of a screw 41 to the flange 24 of the rotating part 19 of the rotary slide clutch 21, which flange is expediently triangular. The rotating part is covered by the hood-shaped, displaceable, non-rotating part 17 of the rotary-sliding coupling 21, radial and axial bearings (not visible) being arranged between the two parts 17, 19, via which the adjusting forces of the adjusting linkage 7 on the Push rod linkage are transmitted.

Die Zylinderbohrungen 34 sind durch eine Schraubkappe 42 abgedeckt, in deren Zentrum eine Bohrung 43 mit einer Dichtung 44 für den Durchgang des Verbindungsstabes 37 vorgesehen ist.The cylinder bores 34 are covered by a screw cap 42, in the center of which a bore 43 with a seal 44 is provided for the passage of the connecting rod 37.

Das Verstellgestänge 7 ist über ein Joch 46, siehe Fig. 4, und einen Bügel 45 über ein Gelenk 22 verbunden. Der Bügel 45 weist die Laschen 16 auf, welche über Gelenke 23 mit Stegen 47 des verschiebbaren, nicht rotierenden Teiles der Dreh-Schiebe-Kupplung verbunden ist. Durch den durch den Bügel 45 und das Joch 46 gebildeten Durchgang 53 ist es auch möglich, die Dreh-Schiebe-Kupplung mit dem Verstellgestänge 7 nicht nur wie in Fig. 2 und 3 ablaufseitig, sondern auch auf der Einlaufseite des Verstellpropellers 1 anzuordnen.The adjustment linkage 7 is connected via a yoke 46, see FIG. 4, and a bracket 45 via a joint 22. The bracket 45 has the tabs 16, which are connected via links 23 to webs 47 of the displaceable, non-rotating part of the rotary / sliding coupling. Through the passage 53 formed by the bracket 45 and the yoke 46, it is also possible to arrange the rotary / sliding coupling with the adjusting linkage 7 not only on the outlet side as in FIGS. 2 and 3, but also on the inlet side of the adjustable propeller 1.

Verbindung der Propellerschaufel 2 mit dem Schaufelfuss bzw. der Verstellscheibe 28 erfolgt, siehe Fig. 2 und 3, mittels Schrauben 50. Durch eine Verschlussschraube 51 ist der Zugang zu einer Einfüllschraube 52 möglich, bei deren Entfernung der geschlossenen Innenraum 36 zugänglich ist.The propeller blade 2 is connected to the blade root or the adjusting disk 28, see FIGS. 2 and 3, by means of screws 50. A screw plug 51 gives access to a filler screw 52, the removal of which makes the closed interior 36 accessible.

Die Zylinderbohrung 34 mit der Kappe 42 ermöglicht es, einen Schutz für den Verbindungsstab 37 zu schaffen, ohne dass zusätzliche Mittel erforderlich sind. Die Erfindung geht hierbei von der Ueberlegung aus, dass der Fremdkörperbefall dann Störungen hervorrufen kann, wenn er sich am Verbindungsstab 37 ausbildet. Die sich dort ansetzenden Muscheln sind sehr hart und kaum zu entfernen. Wird jedoch der Verbindungsstab 37 in einem dunklen Raum, im vorliegenden Fall in der Zylinderbohrung 34 gehalten, tritt kein Fremdkörperbefall auf. Das gleiche gilt auch im wesentlichen für die Zylinderbohrung 35, wenn die Schubstange in der in Fig. 3 dargestellten Lage liegt. Werden beim Stillstand des Wasserfahrzeuges die Schubstangen 20 in die in Figur 2 dargestellte Lage gebracht, ist einerseits die Zylinderbohrung 34 durch die Dichtung 44 und den Verbindungsstab 37 abgeschlossen, während die Zylinderbohrung 35 durch den Kolben 32 abgeschlossen ist. Wird diese Lage der Schubstangen 20 bei jedem Stillstand des Wasserfahrzeuges eingenommen, wird ein Fremdkörperbefall an dem Verbindungsstab 37 zuverlässig vermieden, ebenso in der Zylinderbohrung 35.The cylinder bore 34 with the cap 42 makes it possible to provide protection for the connecting rod 37 without additional means being required. The invention is based on the consideration that the foreign body infestation can cause malfunctions if it forms on the connecting rod 37. The mussels that sit there are very hard and can hardly be removed. However, if the connecting rod 37 is kept in a dark room, in the present case in the cylinder bore 34, no foreign body infection occurs. The same also applies essentially to the cylinder bore 35 when the push rod is in the position shown in FIG. 3. If the push rods 20 are brought into the position shown in FIG. 2 when the watercraft is at a standstill, on the one hand the cylinder bore 34 is closed by the seal 44 and the connecting rod 37, while the cylinder bore 35 is completed by the piston 32. If this position of the push rods 20 is assumed each time the watercraft comes to a standstill, foreign matter on the connecting rod 37 is reliably avoided, as is in the cylinder bore 35.

Damit die Einnahme dieser Schutzstellung zuverlässig erfolgt, kann diese selbsttätig bewirkt werden. Wird das Verstellgestänge 7 durch einen Hydraulik-Linearmotor betätigt, der als Differentialkolben ausgebildet ist, bei welchem in dem Zylinderraum mit der kleineren Fläche eine Feder eingebaut ist, welche bei fehlendem Druck den Kolben in die der in Figur 2 dargestellten Lage entsprechende Lage drückt. Bei der Inbetriebnahme des Wasserfahrzeuges drückt der Mediumdruck den Kolben in eine bestimmte Neutralstellung für den Leerlauf. Die selbsttätige Einhaltung der Schutzstellung und der Neutralstellung der Schubstangen kann auch in anderer Weise, z.B. durch Relais, die mit Endschaltern zusammenwirken und in den gewünschten Stellungen den Linearmotor stillsetzen.So that this protective position is reliably taken, it can be effected automatically. If the adjustment linkage 7 is actuated by a hydraulic linear motor which is designed as a differential piston, in which a spring is installed in the cylinder space with the smaller area, which, when there is no pressure, presses the piston into the position corresponding to the position shown in FIG. When the watercraft is started up, the medium pressure pushes the piston into a specific neutral position for idling. The automatic maintenance of the protective position and the neutral position of the push rods can also be done in another way, e.g. through relays that interact with limit switches and stop the linear motor in the desired positions.

Bei dem beschriebenen Verfahren und den zur Durchführung desselben benötigten Mittel ist ersichtlich, dass der Aufwand verhältnismässig gering ist. Trotzdem wird durch diese einfache Lösung die Betriebssicherheit des Verstellpropellers wesentlich verbessert, indem der Fremdkörperbefall an kritischen Stellen des Schubstangengestänges zuverlässig vermieden wird.With the described method and the means required to carry it out, it can be seen that the effort is relatively low. Nevertheless, this simple solution significantly improves the operational safety of the variable pitch propeller by reliably preventing foreign bodies from being attacked at critical points on the push rod linkage.

Claims (5)

1. Method for the prevention of the deposit of foreign bodies at parts of a thrust rod linkage for the adjustment of the blades of a variable pitch propeller (1), which is provided for the drive of a watercraft driven by an engine (5), wherein the thrust rods (20) of the thrust rod linkage are adjustable by means of an adjusting linkage by way of a rotary slide coupling (21) connecting together the rotating and the displaceable, non-rotating part of the thrust rod linkage, characterised thereby, that immediately after the turning-off of the engine (5), the thrust rods (20) are moved into a protected setting, in which the thrust rods are no longer exposed to the attack of foreign bodies, whilst on the starting of the engine, the thrust rods are moved into a setting which corresponds to the neutral setting of the propeller blades.
2. Method according to claim 1, characterised thereby, that the protected setting and the neutral setting of the thrust rods are taken up automatically during the turning-off and on the starting of the engine.
3. Device for the performance of the method according to claim 1 or 2, characterised thereby, that at the hub (4) of the variable pitch propeller (1), a bearing housing (26) for each propeller blade (2) is firmly or integrally connected with the hub and provided for the pivotal bearing of the blade root (30), in which a thrust rod (20) with an adjusting spigot (27) engaging into the blade root is displaceably borne for each propeller blade, wherein that end of the thrust rods, which is connected with the rotary slide coupling (21), is completely entered into and sealed off outwardly in the bearing housing (26) in the one end position of the thrust rod stroke.
4. Device according to claim 3, characterised thereby, that the ends of the thrust rods (20) are constructed as piston-cylinder guide (31, 34; 32, 35), wherein the guide (31, 34) lying at the side of the rotary slide coupling (21) is provided with a connecting bar (37), the free end of which is connected with a connecting flange (24) of the rotary slide coupling (21) and which in the protected setting of the thrust rod linkage is completely entered into the piston (34) of the piston-cylinder guide.
5. Device according to claim 3 or 4, characterised thereby, that the piston-cylinder guide (31, 34) arranged at the side of the rotary slide coupling (21) is covered by a cap (42) with a bore (43), whilst the connecting bar (37) extends through the bore (43) and is surrounded by a seal (44) fastened at the cap.
EP87111745A 1986-08-22 1987-08-13 Anti-fouling method and device for variable-pitch propeller rods for water craft Expired - Lifetime EP0258706B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3374/86 1986-08-22
CH3374/86A CH670609A5 (en) 1986-08-22 1986-08-22

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EP0258706A1 EP0258706A1 (en) 1988-03-09
EP0258706B1 true EP0258706B1 (en) 1990-05-02

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EP87111745A Expired - Lifetime EP0258706B1 (en) 1986-08-22 1987-08-13 Anti-fouling method and device for variable-pitch propeller rods for water craft

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US (1) US4880402A (en)
EP (1) EP0258706B1 (en)
JP (1) JPH01119497A (en)
CA (1) CA1299031C (en)
CH (1) CH670609A5 (en)
DE (1) DE3762500D1 (en)
DK (1) DK160472C (en)
ES (1) ES2015018B3 (en)
NO (1) NO165907C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4031932A1 (en) * 1990-10-09 1992-04-16 Peter Mueller ADJUSTING PROPELLER

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US5967753A (en) * 1998-09-28 1999-10-19 Muller; Peter Controllable-pitch propeller, especially for sport boats and other watercraft
US6379114B1 (en) 2000-11-22 2002-04-30 Brunswick Corporation Method for selecting the pitch of a controllable pitch marine propeller
US8608441B2 (en) 2006-06-12 2013-12-17 Energyield Llc Rotatable blade apparatus with individually adjustable blades
US7568888B2 (en) * 2006-10-24 2009-08-04 Gm Global Technology Operations, Inc. Fan blades having variable pitch compliantly responsive to a linear actuator
DE102007052427A1 (en) 2007-11-02 2009-05-07 Schaeffler Kg Bearing arrangement for a bearing
EP3649044B1 (en) * 2017-07-06 2022-12-14 Wärtsilä Finland Oy A method of starting an internal combustion engine of a hybrid propulsion system in a marine vessel and a hybrid propulsion system in a marine vessel

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US718881A (en) * 1902-06-12 1903-01-20 Della Sarr Propeller-wheel.
US2138574A (en) * 1936-10-06 1938-11-29 James A Gallagher Reverse and variable pitch propeller
US2374833A (en) * 1939-05-22 1945-05-01 Gen Motors Corp Propeller construction
GB824720A (en) * 1956-11-07 1959-12-02 Lips Nv Adjusting mechanism for adjusting the pitch of the blades of a marine propeller
US3095932A (en) * 1959-12-14 1963-07-02 Christopher De J Hercules Variable-pitch blade propeller
CH668046A5 (en) * 1983-09-22 1988-11-30 Peter Mueller ADJUSTING PROPELLER AND DRIVE FOR WATER VEHICLES.
CH666869A5 (en) * 1984-03-16 1988-08-31 Peter Mueller ADJUSTING DEVICE FOR ADJUSTING PROPELLERS OF WATER VEHICLES.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4031932A1 (en) * 1990-10-09 1992-04-16 Peter Mueller ADJUSTING PROPELLER

Also Published As

Publication number Publication date
DK160472C (en) 1991-08-26
CH670609A5 (en) 1989-06-30
NO873539D0 (en) 1987-08-21
NO873539L (en) 1988-02-23
NO165907C (en) 1991-05-02
ES2015018B3 (en) 1990-08-01
US4880402A (en) 1989-11-14
DK437687A (en) 1988-02-23
CA1299031C (en) 1992-04-21
NO165907B (en) 1991-01-21
DE3762500D1 (en) 1990-06-07
DK160472B (en) 1991-03-18
DK437687D0 (en) 1987-08-21
EP0258706A1 (en) 1988-03-09
JPH01119497A (en) 1989-05-11

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