EP0541046B1 - Propeller pump with blade pitch adjustment - Google Patents

Propeller pump with blade pitch adjustment Download PDF

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Publication number
EP0541046B1
EP0541046B1 EP92118822A EP92118822A EP0541046B1 EP 0541046 B1 EP0541046 B1 EP 0541046B1 EP 92118822 A EP92118822 A EP 92118822A EP 92118822 A EP92118822 A EP 92118822A EP 0541046 B1 EP0541046 B1 EP 0541046B1
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EP
European Patent Office
Prior art keywords
guide
hub
adjusting nut
adjusting
propeller pump
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
EP92118822A
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German (de)
French (fr)
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EP0541046A1 (en
Inventor
Ludwig Dipl.-Ing. Kiefer
Jörg Dipl.-Ing. Löw
Horst Dipl.-Ing. Lottermoser
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Halberg Maschinenbau GmbH
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Halberg Maschinenbau GmbH
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Publication date
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Publication of EP0541046A1 publication Critical patent/EP0541046A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0055—Rotors with adjustable blades

Definitions

  • an adjusting gear for adjusting the blades of a propeller pump which has a link guide within the propeller hub for each blade, which is adjusted by axial movement of part of the link guide.
  • a non-rotatably longitudinal adjustment nut is provided on a threaded spindle, which is driven by an adjustment shaft which is guided from above through the hollow-drilled pump shaft (brochure MAN No. 365 4703 "Pump control").
  • the spindle can also be driven by means of an adjusting motor which is pre-flanged to the propeller hub and is arranged under water.
  • a sleeve is used, which surrounds the nut with wedge guides. Since the link guide cannot reach through the sleeve to the nut, the nut with the straight guide (seen in the direction of flow) is arranged behind the actual propeller hub in an attachment of the hub flange, which is connected to the pump shaft. - A guide camp for the Pump shaft should be located as close as possible to the propeller hub. It is therefore arranged so that it surrounds the mentioned approach of the hub flange. This is expensive because the bearing diameter has a large diameter in view of the adjusting nut and straight guide contained in the flange attachment, which also has a disadvantageous effect on the bearing quality.
  • the known solution is also complex due to the presence of a wedge guide for the adjusting nut, which has to be carried out very carefully because it is unfavorably stressed by the adjusting forces of the axially offset link guide.
  • the invention is therefore based on the object of providing a propeller pump of the type mentioned in the preamble of claim 1 and described in the introduction, in which the flange shoulder of the propeller hub is free of an adjusting nut or a straight guide.
  • the solution according to the invention consists in the characterizing features of claim 1.
  • guide rods as a straight guide for the adjusting nut enables radial penetration from the link guides through the longitudinal guide to the adjusting nut, so that all these parts can be accommodated in the same axial area, namely in the impeller hub. A large-diameter approach behind the hub flange within the guide bearing is therefore not necessary.
  • the guide bearing can therefore be designed with a smaller diameter, correspondingly less expensive and with high guide quality.
  • the adjusting device is also less complex because, on the one hand, it can be made much smaller and, on the other hand, the longitudinal guide for the adjusting nut is simpler. Drawn bar material can be used for the guide bars. If the guide rods have a round cross section, the guide devices interacting with them are formed by simple bores. It is also easy to hold the ends of the guide rods because there are only corresponding mounting holes
  • the propeller hub is formed by the hub part 1, which is connected in a manner not shown on its rear side in the direction of flow 22 to the pump shaft, and the impeller body 2, which forms the bearings 3 for a plurality of rotor blades 4, the rotor blade pin 5 of which is inside the hub 1 , 2 carry an adjusting lever 6, which ends in the sliding block 7.
  • the threaded spindle 8 is arranged centrally within the hub 1, 2, the end of which can be rotated in a bearing 9 which is fixedly connected to the impeller body 2 via the flange part 10. In a known manner, not shown, the threaded spindle is connected to an adjusting drive via an adjusting shaft.
  • the adjusting nut 11 On the threaded spindle, the adjusting nut 11 is arranged, which is firmly connected to the annular guide part 12, which forms the adjusting link 13 for the sliding block 7.
  • the shape and arrangement of the link guide 13 is designed in a known manner so that the axial movement of the guide member 12 results in the desired adjustment of the blades 4.
  • the adjusting nut 11 or Guide part 12 be guided in the longitudinal direction and rotatably and it is provided with a plurality of axially parallel bores 14 which correspond in number, arrangement and dimensions to the guide rods 15, which are formed by drawn round material and the ends of which are in bores 16 of the cover-tight bearing flange 10 and in bores 17 of the retaining ring 18 fixed to the hub part 1 are held.
  • the bores 16 could also be contained directly in the impeller body 2 or in another part firmly connected to it.
  • the bores 17 could also be contained directly in the hub flange 1.
  • the retaining ring 18 is rotatably guided by means of fitting and guide devices 19, but can be moved longitudinally with the hub part 1 or a receiving ring 20 arranged therein for easier assembly and disassembly.
  • the relationship between the setting accuracy and the manufacturing effort of the adjusting device is very favorable. Not only are the guide parts less expensive than in known designs, but the requirements for the force absorption by the guide members are also more favorable because both the link guide 7, 13 and the longitudinal guide 14, 15 of the link or the adjusting nut lie in the same axial area .
  • the invention can be used both in the illustrated semi-axial pump shape and in the case of axial pumps in metal and concrete housing designs.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

Es ist bekannt, zum Verstellen der Laufschaufeln einer Propellerpumpe ein Verstellgetriebe vorzusehen, das innerhalb der Propellernabe für jede Laufschaufel eine Kulissenführung aufweist, die durch axiale Bewegung eines Teils der Kulissenführung verstellt wird. Dafür ist eine undrehbar längsgeführte Verstellmutter auf einer Gewindespindel vorgesehen, die von einer Verstellwelle angetrieben wird, die von oben durch die hohlgebohrte Pumpenwelle geführt ist (Prospekt MAN Nr. 365 4703 "Pumpenregelung"). Stattdessen kann die Spindel auch mittels eines der Propellernabe vorgeflanschten, unter Wasser angeordneten Verstellmotors angetrieben sein.It is known to provide an adjusting gear for adjusting the blades of a propeller pump, which has a link guide within the propeller hub for each blade, which is adjusted by axial movement of part of the link guide. For this purpose, a non-rotatably longitudinal adjustment nut is provided on a threaded spindle, which is driven by an adjustment shaft which is guided from above through the hollow-drilled pump shaft (brochure MAN No. 365 4703 "Pump control"). Instead, the spindle can also be driven by means of an adjusting motor which is pre-flanged to the propeller hub and is arranged under water.

Für die Geradführung der Verstellmutter verwendet man eine Hülse, die die Mutter mit Keilführungen umgibt. Da die Kulissenführung nicht durch die Hülse hindurch zur Mutter durchgreifen kann, ordnet man die Mutter mit der Geradführung (in Strömungsrichtung gesehen) hinter der eigentlichen Propellernabe in einem Ansatz des Nabenflansches an, der mit der Pumpenwelle verbunden ist. - Ein Führungslager für die Pumpenwelle sollte möglichst nahe der Propellernabe angeordnet sein. Es wird deshalb so angeordnet, daß es den erwähnten Ansatz des Nabenflansches umgibt. Dies ist aufwendig, weil der Lagerdurchmesser im Hinblick auf die im Flanschansatz enthaltene Verstellmutter und Geradführung großen Durchmesser hat, was sich auch nachteilig auf die Lagerqualität auswirkt. Aufwendig ist die bekannte Lösung auch durch das Vorhandensein einer Keilführung für die Verstellmutter, die sehr sorgfältig ausgeführt sein muß, weil sie von den Verstellkräften der axial versetzten Kulissenführung in ungünstiger Weise beansprucht wird.For the straight guidance of the adjusting nut, a sleeve is used, which surrounds the nut with wedge guides. Since the link guide cannot reach through the sleeve to the nut, the nut with the straight guide (seen in the direction of flow) is arranged behind the actual propeller hub in an attachment of the hub flange, which is connected to the pump shaft. - A guide camp for the Pump shaft should be located as close as possible to the propeller hub. It is therefore arranged so that it surrounds the mentioned approach of the hub flange. This is expensive because the bearing diameter has a large diameter in view of the adjusting nut and straight guide contained in the flange attachment, which also has a disadvantageous effect on the bearing quality. The known solution is also complex due to the presence of a wedge guide for the adjusting nut, which has to be carried out very carefully because it is unfavorably stressed by the adjusting forces of the axially offset link guide.

Ferner ist es bekannt (GB-A 1 278 825), die Verstellmutter außerhalb der Nabe und der Welle anzuordnen. Das hat zur Folge, daß statt der bei den vorgenannten Konstruktionen in der Pumpenwelle enthaltenen Verstellwelle eine Zug- oder Druckstange angeordnet ist, die die Kraft von der Kulisse zur außen angeordneten Verstellmutter überträgt.It is also known (GB-A 1 278 825) to arrange the adjusting nut outside the hub and the shaft. The result of this is that instead of the adjusting shaft contained in the pump shaft in the above-mentioned constructions, a pull or push rod is arranged, which transmits the force from the link to the outside adjusting nut.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Propellerpumpe der im Oberbegriff des Anspruchs 1 genannten und eingangs beschriebenen Art zu schaffen, bei der der Flanschansatz der Propellernabe frei ist von einer Verstellmutter oder einer Geradführung. Die erfindungsgemäße Lösung besteht in den kennzeichnenden Merkmalen des Anspruchs 1.The invention is therefore based on the object of providing a propeller pump of the type mentioned in the preamble of claim 1 and described in the introduction, in which the flange shoulder of the propeller hub is free of an adjusting nut or a straight guide. The solution according to the invention consists in the characterizing features of claim 1.

Die Verwendung von Führungsstangen als Geradführung für die Verstellmutter ermöglicht den radialen Durchgriff von den Kulissenführungen durch die Längsführung zu der Verstellmutter, so daß alle diese Teile in demselben axialen Bereich, nämlich in der Laufradnabe untergebracht werden können. Ein großdurchmeßriger Ansatz hinter dem Nabenflansch innerhalb des Führungslagers ist somit nicht erforderlich. Das Führungslager kann daher mit geringerem Durchmesser, entsprechend weniger aufwendig und mit hoher Führungsqualität ausgeführt werden. Auch der Verstellapparat ist weniger aufwendig, weil er zum einen wesentlich kleiner ausgeführt werden kann und zum anderen die Längsführung für die Verstellmutter einfacher ist. Für die Führungsstangen kann nämlich auf gezogenes Stangenmaterial zurückgegriffen werden. Wenn die Führungsstangen runden Querschnitt haben, werden die mit ihnen zusammenwirkenden Führungseinrichtungen von einfachen Bohrungen gebildet. Einfach ist auch die Halterung der Enden der Führungsstangen, weil dafür lediglich entsprechende AufnahmebohrungenThe use of guide rods as a straight guide for the adjusting nut enables radial penetration from the link guides through the longitudinal guide to the adjusting nut, so that all these parts can be accommodated in the same axial area, namely in the impeller hub. A large-diameter approach behind the hub flange within the guide bearing is therefore not necessary. The guide bearing can therefore be designed with a smaller diameter, correspondingly less expensive and with high guide quality. The adjusting device is also less complex because, on the one hand, it can be made much smaller and, on the other hand, the longitudinal guide for the adjusting nut is simpler. Drawn bar material can be used for the guide bars. If the guide rods have a round cross section, the guide devices interacting with them are formed by simple bores. It is also easy to hold the ends of the guide rods because there are only corresponding mounting holes

einerseits im Nabenkörper und andererseits im Flansch der Nabe geschaffen werden müssen.on the one hand in the hub body and on the other hand in the flange of the hub.

Zwar ist es denkbar, die Führungsstangen längsfest mit der Verstellmutter zu verbinden und sie in nabenfesten Führungsbohrungen gleiten zu lassen; bevorzugt wird jedoch eine Ausführung, bei welcher die Führungsstangen fest in der Propellernabe angeordnet sind und die Verstellmutter bzw. ein mit dieser fest verbundener Teil Führungsbohrungen enthält, die die Führungsstangen aufnehmen. Dies kann derselbe Teil sein, der auch die Kulissen zur Führung der Kulissensteine bildet, die mit den Schaufelzapfen verbunden sind.It is conceivable to connect the guide rods longitudinally fixed to the adjusting nut and to let them slide in guide bores fixed to the hub; However, an embodiment is preferred in which the guide rods are arranged fixedly in the propeller hub and the adjusting nut or a part firmly connected to it contains guide bores which receive the guide rods. This can be the same part that also forms the backdrop for guiding the sliding blocks that are connected to the blade pins.

Die Erfindung wird im folgenden näher unter Bezugnahme auf die Zeichnung erläutert, die ein vorteilhaftes Ausführungsbeispiel in einem Teil-Längsschnitt durch die Propellernabe zeigt.The invention is explained in more detail below with reference to the drawing, which shows an advantageous embodiment in a partial longitudinal section through the propeller hub.

Die Propellernabe wird gebildet von dem Nabenteil 1, der auf seiner in Strömungsrichtung 22 hinten liegenden Seite in nicht dargestellter Weise mit der Pumpenwelle verbunden ist, und dem Laufradkörper 2, der die Lager 3 für mehrere Laufschaufeln 4 bildet, deren Laufschaufelzapfen 5 innerhalb der Nabe 1, 2 einen Verstellhebel 6 tragen, der im Kulissenstein 7 endet.The propeller hub is formed by the hub part 1, which is connected in a manner not shown on its rear side in the direction of flow 22 to the pump shaft, and the impeller body 2, which forms the bearings 3 for a plurality of rotor blades 4, the rotor blade pin 5 of which is inside the hub 1 , 2 carry an adjusting lever 6, which ends in the sliding block 7.

Zentrisch innerhalb der Nabe 1, 2 ist die Gewindespindel 8 angeordnet, deren Ende in einem Lager 9 drehbar ist, das über den Flanschteil 10 fest mit dem Laufradkörper 2 verbunden ist. In nicht dargestellter, bekannter Weise ist die Gewindespindel über eine Verstellwelle mit einem Verstelltrieb verbunden.The threaded spindle 8 is arranged centrally within the hub 1, 2, the end of which can be rotated in a bearing 9 which is fixedly connected to the impeller body 2 via the flange part 10. In a known manner, not shown, the threaded spindle is connected to an adjusting drive via an adjusting shaft.

Auf der Gewindespindel ist die Verstellmutter 11 angeordnet, die fest mit dem ringförmigen Führungsteil 12 verbunden ist, der die Verstellkulisse 13 für den Kulissenstein 7 bildet. Die Form und Anordnung der Kulissenführung 13 ist in bekannter Weise so gestaltet, daß sich bei axialer Bewegung des Führungsteils 12 die gewünschte Verstellung der Laufschaufeln 4 ergibt. Zu diesem Zweck muß die Verstellmutter 11 bzw. der Führungsteil 12 in Längsrichtung undrehbar geführt sein und ist er mit mehreren achsparallelen Bohrungen 14 versehen, die in Zahl, Anordnung und Abmessungen den Führungsstangen 15 entsprechen, die von gezogenem Rundmaterial gebildet sind und deren Enden einerseits in Bohrungen 16 des deckelfesten Lagerflansches 10 und andererseits in Bohrungen 17 des an dem Nabenteil 1 festen Halterings 18 gehalten sind. Die Bohrungen 16 könnten auch unmittelbar in den Laufradkörper 2 oder einem anderen mit diesem fest verbundenen Teil enthalten sein. Die Bohrungen 17 könnten auch unmittelbar in dem Nabenflansch 1 enthalten sein. Im dargestellten Fall ist der Haltering 18 über Paß- und Führungseinrichtungen 19 drehfest, aber zwecks leichterer Montage und Demontage längsbeweglich mit dem Nabenteil 1 oder einem darin angeordneten Aufnahmering 20 geführt.On the threaded spindle, the adjusting nut 11 is arranged, which is firmly connected to the annular guide part 12, which forms the adjusting link 13 for the sliding block 7. The shape and arrangement of the link guide 13 is designed in a known manner so that the axial movement of the guide member 12 results in the desired adjustment of the blades 4. For this purpose, the adjusting nut 11 or Guide part 12 be guided in the longitudinal direction and rotatably and it is provided with a plurality of axially parallel bores 14 which correspond in number, arrangement and dimensions to the guide rods 15, which are formed by drawn round material and the ends of which are in bores 16 of the cover-tight bearing flange 10 and in bores 17 of the retaining ring 18 fixed to the hub part 1 are held. The bores 16 could also be contained directly in the impeller body 2 or in another part firmly connected to it. The bores 17 could also be contained directly in the hub flange 1. In the illustrated case, the retaining ring 18 is rotatably guided by means of fitting and guide devices 19, but can be moved longitudinally with the hub part 1 or a receiving ring 20 arranged therein for easier assembly and disassembly.

Das Verhältnis zwischen der Einstellgenauigkeit und dem Herstellungsaufwand des Verstellapparates ist sehr günstig. Nicht nur sind die Führungsteile weniger aufwendig als bei bekannten Ausführungen, sondern die Voraussetzungen für die Kraftaufnahme durch die Führungsorgane sind auch günstiger, weil sowohl die Kulissenführung 7, 13 als auch die Längsführung 14, 15 der Kulisse bzw. der Verstellmutter in demselben axialen Bereich liegen.The relationship between the setting accuracy and the manufacturing effort of the adjusting device is very favorable. Not only are the guide parts less expensive than in known designs, but the requirements for the force absorption by the guide members are also more favorable because both the link guide 7, 13 and the longitudinal guide 14, 15 of the link or the adjusting nut lie in the same axial area .

Es versteht sich, daß die Anordnung in bekannter Weise zu der Achse 21 rotationssymmetrisch ist.It is understood that the arrangement is rotationally symmetrical to the axis 21 in a known manner.

Ferner versteht es sich, daß die Erfindung sowohl bei der dargestellten halbaxialen Pumpenform als auch bei axialen Pumpen in Metall- und Betongehäuseausführung verwendbar ist.Furthermore, it goes without saying that the invention can be used both in the illustrated semi-axial pump shape and in the case of axial pumps in metal and concrete housing designs.

Claims (2)

  1. A propeller pump with blade adjustment, adjustment means being provided which is formed by a threaded spindle (8) and an adjusting nut (11) which determines the position of the blades (4) via a guide slot (13,7) disposed in the hub (1,2), wherein a slide guide is disposed in the hub (1,2) and the slide guide comprises guide bars (15) the ends of which are retained on the impeller body (2) and/or on the hub part (1) of the hub, characterised in that the adjusting nut (11) is axially adjustable on the threaded spindle (8), is provided with a slide guide (14,15) and is disposed in the hub (1,2).
  2. A propeller pump according to Claim 1, characterised in that the guide bars (15) and the associated guide mountings (14) are of circular cross-section.
EP92118822A 1991-11-04 1992-11-03 Propeller pump with blade pitch adjustment Expired - Lifetime EP0541046B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9113713U 1991-11-04
DE9113713U DE9113713U1 (en) 1991-11-04 1991-11-04 Propeller pump with impeller blade adjustment

Publications (2)

Publication Number Publication Date
EP0541046A1 EP0541046A1 (en) 1993-05-12
EP0541046B1 true EP0541046B1 (en) 1996-02-28

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ID=6872924

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92118822A Expired - Lifetime EP0541046B1 (en) 1991-11-04 1992-11-03 Propeller pump with blade pitch adjustment

Country Status (2)

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EP (1) EP0541046B1 (en)
DE (2) DE9113713U1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2779218B1 (en) * 1998-05-29 2000-08-11 Etudes Const Mecaniques GAS QUENCHING CELL

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1101154B (en) * 1960-01-28 1961-03-02 Maschf Augsburg Nuernberg Ag Device for adjusting the impeller blades of pumps, turbines, etc. like
GB1278825A (en) * 1969-04-10 1972-06-21 Nat Res Dev Pump, fan or turbine with variable blade rake

Also Published As

Publication number Publication date
EP0541046A1 (en) 1993-05-12
DE9113713U1 (en) 1993-03-04
DE59205468D1 (en) 1996-04-04

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