EP0511518A1 - Split impeller - Google Patents

Split impeller Download PDF

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Publication number
EP0511518A1
EP0511518A1 EP92105851A EP92105851A EP0511518A1 EP 0511518 A1 EP0511518 A1 EP 0511518A1 EP 92105851 A EP92105851 A EP 92105851A EP 92105851 A EP92105851 A EP 92105851A EP 0511518 A1 EP0511518 A1 EP 0511518A1
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EP
European Patent Office
Prior art keywords
blade
impeller
parts
blades
another
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Granted
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EP92105851A
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German (de)
French (fr)
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EP0511518B1 (en
Inventor
Karlheinz Becker
Peter Milla
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KSB AG
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KSB AG
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2205—Conventional flow pattern
    • F04D29/2222—Construction and assembly

Definitions

  • the invention relates to an impeller according to the preamble of the main claim.
  • DE-C-550 461 describes the problem of how the inlet edges of the blades can be finished in the case of impellers of small turbomachines.
  • the impeller is divided and the blades are designed as an integral part of the impeller cover disk on the suction or pressure side.
  • the blade channels are closed by a cover plate part in the outlet area of the impeller.
  • the remaining cover plate part is part of the other impeller part.
  • the transmission of forces then takes place through a corresponding approach in the connection area between the suction or pressure side cover plate part.
  • the impeller parts cannot be completely machined due to their design.
  • the invention has for its object to develop a cutting, pressing or casting technically manufactured impeller in a closed and divided design in the simplest way. This object is achieved in accordance with the characterizing part of the main claim.
  • at least two blades are divided in length. In the area of their division, they fit together connecting impeller parts. The remaining blades can alternately be part of the impeller parts or cover disks and rest sealingly against them.
  • the configurations of claims 2 and 3 describe further advantageous developments. Thereafter, the blade parts having a blade start are part of the one impeller part, and the supplementary blade parts having the corresponding blade ends are part of the other impeller part.
  • Each impeller part has two wall surfaces from the blade channel, which stand on one another and enclose an angle between them.
  • the blade channels delimited by blades are formed for a conveying medium.
  • the blades are, as it were, divided in their blade length, the separation point running transversely to the blade length.
  • the attachment of the blade parts forming the beginning of the blade to one impeller part and the attachment of the additional blade parts forming the blade end to the other impeller part enables problem-free assembly and simple centering of the impeller parts. It is also possible, in those cases in which very narrow blade spacings and thus the smallest blade channel cross sections have to be realized, to alternately provide blade parts which are provided with blade ends and blade beginnings and join together to form a uniform whole on the impeller parts or cover disks. This leaves a larger space on each impeller part, which enables easier machining with larger diameter tools.
  • the invention generally offers this advantage through the blade division.
  • An embodiment of the invention provides that at least three partial planes are provided between the impeller parts to be connected to one another, two partial planes being arranged in the wall surface of the cover plate planes which delimit the blade channels and which are at an axial distance from one another and which are connected to each other by the third partial plane running in the direction of the central axis and dividing the blades.
  • the respective free-standing longitudinal sides of the blade parts thus lie sealingly on the opposite impeller part or the cover disk delimiting the blade channel.
  • a further embodiment of the invention provides that the impeller parts are connected to one another by a form-fitting plug connection in the area of the blade division.
  • the impeller parts to be connected can be centered by corresponding overlaps in the area of the blade parts to be connected.
  • a further embodiment of the invention provides that the part plane dividing the blades has no straight line.
  • An arcuate, S-shaped, Z-shaped, meandering or similarly shaped course of the partial plane of the blades is advantageous. This has the advantage that not only is the two parts centered with respect to one another, but that, due to the course of the part plane, an anti-rotation device is also generated. For assembly, it is sufficient to simply plug the parts into one another. Elaborate centering, dowel pins and connecting elements, as previously required in multi-stage turbomachines, are completely eliminated. When assembling such a turbomachine, the centering and positioning of the individual impeller parts can only be placed in the connection area of the divided blades.
  • the problem has arisen when machining an impeller in its entry area. If the distance between the blades is very small, the blade channels can only be produced with narrow, thin end mills and are therefore only time-consuming and risky.
  • the partial plane can be placed in the case of small channel cross sections such that the distance between the beginning or end of the blade and the partial plane of the blade is chosen to be large and a milling cutter with a large diameter for inexpensive manufacture easily passed between the blade parts of the respective impeller part and so the blade contour can be worked out.
  • the example of an impeller of a turbomachine shown in FIG. 1 belongs to a multi-stage centrifugal pump for large delivery capacities.
  • One impeller part (1) consists of the hub (2) and the pressure-side cover plate (3).
  • the blade parts (5) provided with blade ends (4) are an integral part of the pressure-side cover plate (3) and can be worked out from the solid.
  • the hub (2) shown here is also an integral part of the pressure-side cover disk (3), it is readily possible to design the hub (2) as a separate component.
  • the other impeller part (6) consists of the suction-side cover disc (7) with the fixedly connected blade parts (7) having the blade tips (8).
  • the separation planes (A, B and C) are drawn in between the two impeller parts (1, 6) with a double line width.
  • the parting planes (A and B) correspond to the wall surface course of the cover disks (3, 7) which delimits the vane channels.
  • the parting plane (C) divides the blade length.
  • the course of the blade division can be seen from FIG. 2, which corresponds to a section according to the section line drawn in FIG. 1.
  • the parting plane (C) divides the blades into two parts and runs in the axial direction. If required, any other course of the parting plane (C) is also possible. In this exemplary embodiment, it has an S-shaped course, which is the one with the other Parts to be joined are both centered and secured against rotation at the same time. This form-fitting connection can also have any other suitable course which ensures the same function.
  • the blade channels (10) of the impeller are formed between the blade parts (5, 9) which are arranged next to one another over the circumference.
  • blade parts on the impeller part carrying them, after which a blade part (9) with blade start (8) is alternately followed by a blade part (5) with blade end (4). This depends on the individual case and the shape of the blade channels (10). If an assignment of the parts to be joined together in a specific position is required, this can be brought about by a different design of the parting plane or a special arrangement of blade parts.

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

Abstract

The invention relates to an impeller of split construction for turbomachines. Flow-controlling blades located inside the impeller are formed in two parts. One impeller part (1) has a group of blade parts (5) and the other impeller part is provided with the remaining blade parts (9). The blade parts are spliced together to form a uniform whole. <IMAGE>

Description

Die Erfindung betrifft ein Laufrad gemäß dem Oberbegriff des Hauptanspruches.The invention relates to an impeller according to the preamble of the main claim.

In der DE-C-550 461 ist das Problem geschildert, wie bei Laufrädern von kleinen Strömungsmaschinen die Einlaufkanten der Schaufeln fertig bearbeitet werden können. Hierbei wird das Laufrad geteilt und die Schaufeln sind als fester Bestandteil der saug- oder druckseitigen Laufraddeckscheibe ausgebildet. Um eine sichere kräfteübertragende Verbindung zu erhalten, sind im Austrittsbereich des Laufrades die Schaufelkanäle durch einen Deckscheibenteil verschlossen. Der verbleibende Deckscheibenteil ist Bestandteil des anderen Laufradteiles. Die Kräfteübertragung erfolgt dann durch einen entsprechenden Ansatz im Verbindungsbereich zwischen dem saug- oder druckseitigen Deckscheibenteil. Die Laufradteile können aber aufgrund ihrer Gestaltung nicht vollständig in spanabhebender Weise erstellt werden.DE-C-550 461 describes the problem of how the inlet edges of the blades can be finished in the case of impellers of small turbomachines. Here, the impeller is divided and the blades are designed as an integral part of the impeller cover disk on the suction or pressure side. In order to obtain a secure force-transmitting connection, the blade channels are closed by a cover plate part in the outlet area of the impeller. The remaining cover plate part is part of the other impeller part. The transmission of forces then takes place through a corresponding approach in the connection area between the suction or pressure side cover plate part. However, the impeller parts cannot be completely machined due to their design.

Der Erfindung liegt die Aufgabe zugrunde, ein in einfachster Weise spanabhebend, preß- oder gußtechnisch herstellbares Laufrad in geschlossener und geteilter Bauart zu entwickeln. Die Lösung dieser Aufgabe erfolgt gemäß dem kennzeichnenden Teil des Hauptanspruches. Nach dieser Lösung sind mindestens zwei Schaufeln in ihrer Länge geteilt ausgebildet. Im Bereich ihrer Teilung erfolgt die Passung der miteinander zu verbindenden Laufradteile. Die restlichen Schaufeln können hierbei wechselweise Bestandteil der Laufradteile bzw. Deckscheiben sein und dichtend an diesen anliegen. Die Ausgestaltungen der Ansprüche 2 und 3 beschreiben weitere vorteilhafte Ausbildungen. Danach sind die einen Schaufelanfang aufweisenden Schaufelteile Bestandteil des einen Laufradteiles, und die die entsprechenden Schaufelenden aufweisenden ergänzenden Schaufelteile sind Bestandteil des anderen Laufradteiles. Jedes Laufradteil weist vom Schaufelkanal zwei Wandflächen auf, die aufeinanderstehen und zwischen sich einen Winkel einschließen. Durch ein Zusammenstecken der Laufradteile werden die von Schaufeln begrenzten Schaufelkanäle für ein Fördermedium gebildet. Die Schaufeln sind gewissermaßen in ihrer Schaufellänge geteilt ausgebildet, wobei die Trennstelle quer zur Schaufellänge verläuft. Das Anbringen der den Schaufelanfang bildenden Schaufelteile an dem einen Laufradteil und das Anbringen der das Schaufelende bildenden ergänzenden Schaufelteile an dem anderen Laufradteil ermöglicht ein problemloses Zusammenstecken sowie einfachstes Zentrieren der Laufradteile. Es ist auch möglich, in denjenigen Fällen, bei denen sehr enge Schaufelabstände und damit kleinste Schaufelkanalquerschnitte verwirklicht werden müssen, auf den Laufradteilen bzw. Deckscheiben wechselweise mit Schaufelenden und Schaufelanfängen versehene, sich zu einem einheitlichen Ganzen zusammenfügende Schaufelteile vorzusehen. Somit verbleibt auf jedem Laufradteil ein größerer Zwischenraum, welcher eine leichtere spanabhebende Bearbeitung mit im Durchmesser größeren Werkzeugen ermöglicht. Diesen Vorteil bietet die Erfindung durch die Schaufelteilung generell.The invention has for its object to develop a cutting, pressing or casting technically manufactured impeller in a closed and divided design in the simplest way. This object is achieved in accordance with the characterizing part of the main claim. According to this solution, at least two blades are divided in length. In the area of their division, they fit together connecting impeller parts. The remaining blades can alternately be part of the impeller parts or cover disks and rest sealingly against them. The configurations of claims 2 and 3 describe further advantageous developments. Thereafter, the blade parts having a blade start are part of the one impeller part, and the supplementary blade parts having the corresponding blade ends are part of the other impeller part. Each impeller part has two wall surfaces from the blade channel, which stand on one another and enclose an angle between them. By plugging the impeller parts together, the blade channels delimited by blades are formed for a conveying medium. The blades are, as it were, divided in their blade length, the separation point running transversely to the blade length. The attachment of the blade parts forming the beginning of the blade to one impeller part and the attachment of the additional blade parts forming the blade end to the other impeller part enables problem-free assembly and simple centering of the impeller parts. It is also possible, in those cases in which very narrow blade spacings and thus the smallest blade channel cross sections have to be realized, to alternately provide blade parts which are provided with blade ends and blade beginnings and join together to form a uniform whole on the impeller parts or cover disks. This leaves a larger space on each impeller part, which enables easier machining with larger diameter tools. The invention generally offers this advantage through the blade division.

Eine Ausgestaltung der Erfindung sieht vor, daß zwischen den miteinander zu verbindenden Laufradteilen mindestens drei Teilebenen vorgesehen sind, wobei zwei Teilebenen in der die Schaufelkanäle begrenzenden Wandfläche der Deckscheibenebenen angeordnet sind, die einen axialen Abstand zueinander aufweisen und die durch die in Richtung der Mittelachse verlaufende, die Schaufeln teilende dritte Teilebene miteinander verbunden sind. Die jeweils freistehenden Längsseiten der Schaufelteile liegen somit dichtend an dem den Schaufelkanal begrenzenden gegenüberliegenden Laufradteil bzw. der Deckscheibe an.An embodiment of the invention provides that at least three partial planes are provided between the impeller parts to be connected to one another, two partial planes being arranged in the wall surface of the cover plate planes which delimit the blade channels and which are at an axial distance from one another and which are connected to each other by the third partial plane running in the direction of the central axis and dividing the blades. The respective free-standing longitudinal sides of the blade parts thus lie sealingly on the opposite impeller part or the cover disk delimiting the blade channel.

Eine weitere Ausgestaltung der Erfindung sieht vor, daß die Laufradteile durch eine im Bereich der Schaufelteilung angebrachte formschlüssige Steckverbindung miteinander verbunden sind. Eine Zentrierung der miteinander zu verbindenden Laufradteile kann durch entsprechende Überlappungen im Bereich der zu verbindenden Schaufelteile erfolgen.A further embodiment of the invention provides that the impeller parts are connected to one another by a form-fitting plug connection in the area of the blade division. The impeller parts to be connected can be centered by corresponding overlaps in the area of the blade parts to be connected.

Eine weitere Ausgestaltung der Erfindung sieht hierzu vor, daß die die Schaufeln teilende Teilebene keinen geradlinigen Verlauf aufweist. Vorteilhaft ist ein bogenförmiger, S-förmiger, Z-förmiger, mäanderförmiger oder ähnlich gestalteter Verlauf der Teilebene der Schaufeln. Dies hat den Vorteil, daß nicht nur eine Zentrierung der beiden Teile zueinander erfolgt, sondern daß infolge des Teilebenenverlaufs auch eine Verdrehsicherung erzeugt wird. Für die Montage genügt es, die Teile einfach ineinanderzustecken. Aufwendige Zentrierungen, Paßstifte und Verbindungselemente, wie sie bisher bei mehrstufigen Strömungsmaschinen erforderlich waren, entfallen vollständig. Bei einem Zusammenbau einer derartigen Strömungsmaschine kann die Zentrierung und Positionierung der einzelnen Laufradteile ausschließlich in den Verbindungsbereich der geteilten Schaufeln gelegt werden. Bei einer ganz oder teilweisen spanabhebenden Fertigung, beispielsweise durch Fräsen von geschmiedeten, gepreßten oder gegossenen Rohteilen, ist somit eine äußerst kostengünstige Herstellung und Montage möglich. Diese Art der Herstellung erlaubt auch die Herstellung von Laufrädern mit reproduzierbaren Leistungsdaten, wodurch eine erhebliche Minimierung von Prüfstandsversuchen möglich ist. Es besteht die Möglichkeit, jedes Laufradteil beispielsweise in einer Aufspannung und mit nur einem Fräswerkzeug spanabhebend herzustellen bzw. nachzuarbeiten.A further embodiment of the invention provides that the part plane dividing the blades has no straight line. An arcuate, S-shaped, Z-shaped, meandering or similarly shaped course of the partial plane of the blades is advantageous. This has the advantage that not only is the two parts centered with respect to one another, but that, due to the course of the part plane, an anti-rotation device is also generated. For assembly, it is sufficient to simply plug the parts into one another. Elaborate centering, dowel pins and connecting elements, as previously required in multi-stage turbomachines, are completely eliminated. When assembling such a turbomachine, the centering and positioning of the individual impeller parts can only be placed in the connection area of the divided blades. In the case of wholly or partly machining production, for example by milling forged, pressed or cast raw parts, extremely cost-effective production and assembly are possible. This type of production also allows the production of impellers with reproducible performance data, which considerably minimizes test bench tests is possible. It is possible to machine or rework each impeller part, for example, in one clamping and with only one milling tool.

Bisher stellte sich das Problem bei einer spanabhebenden Herstellung eines Laufrades in dessen Eintrittsbereich. Ist der Abstand zwischen den Schaufeln sehr klein, so lassen sich die Schaufelkanäle nur mit schmalen dünnen Fingerfräsern und damit nur zeitaufwendig und risikoreich herstellen. Indem nun in erfindungsgemäßer Weise die Schaufeln selbst geteilt werden, kann bei geringen Kanalquerschnitten die Teilebene so gelegt werden, daß der Abstand zwischen Schaufelanfang bzw. - ende und der Teilebene der Schaufel groß gewählt werden und ein für eine günstige Herstellung einen großen Durchmesser aufweisender Fräser in einfachster Weise zwischen den Schaufelteilen des jeweiligen Laufradteiles hindurchgefahren und so die Schaufelkontur herausgearbeitet werden kann.So far, the problem has arisen when machining an impeller in its entry area. If the distance between the blades is very small, the blade channels can only be produced with narrow, thin end mills and are therefore only time-consuming and risky. By dividing the blades themselves in the manner according to the invention, the partial plane can be placed in the case of small channel cross sections such that the distance between the beginning or end of the blade and the partial plane of the blade is chosen to be large and a milling cutter with a large diameter for inexpensive manufacture easily passed between the blade parts of the respective impeller part and so the blade contour can be worked out.

Die gesamte Zentrierung der miteinander zu verbindenden Teile des Laufrades erfolgt über die Trennebene im Bereich der aus Teilen zusammengesetzten Schaufeln. Diese bewirkt darüber hinaus auch die Verdrehsicherung der Bauteile untereinander. Für die Montage und Herstellung einer derartigen Strömungsmaschine bedeutet dies eine gravierende Vereinfachung, da somit in einfachster Weise nur noch ein Ineinanderstecken der einzelnen Bauteile erforderlich ist. Überdies kann somit in nicht mehr zu überbietender Einfachheit eine Anpassung an unterschiedliche Leistungsbereiche erfolgen. Durch eine Änderung der Schaufelbreite kann das Laufrad bei der Herstellung an die jeweils gewünschten Leistungsdaten angepaßt werden. Dies ist bei der spanabhebenden Herstellung durch einfache Programmänderungen möglich.The entire centering of the parts of the impeller to be connected takes place via the parting plane in the area of the blades composed of parts. In addition, this also prevents the components from rotating against each other. For the assembly and manufacture of such a turbomachine, this means a serious simplification, since it is thus only necessary to simply plug the individual components into one another. In addition, it can thus be adapted to different performance ranges in a simplicity that can no longer be surpassed. By changing the blade width, the impeller can be adapted to the desired performance data during manufacture. This is possible in machining by simple program changes.

Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden im folgenden näher beschrieben. Es zeigen am Beispiel eines Kreiselpumpen-Laufrades die

Fig. 1
einen axialen Schnitt durch ein Laufrad und die
Fig. 2
einen Querschnitt durch das Laufrad gemäß der in Fig. 1 enthaltenen Linie II-II.
Embodiments of the invention are shown in the drawings and are described in more detail below. They show the example of a centrifugal pump impeller
Fig. 1
an axial section through an impeller and the
Fig. 2
a cross section through the impeller according to the line II-II contained in Fig. 1.

Das in der Fig. 1 gezeigte Beispiel eines Laufrades einer Strömungsmaschine gehört zu einer mehrstufigen Kreiselpumpe für große Förderleistungen. Der eine Laufradteil (1) besteht aus der Nabe (2) und der druckseitigen Deckscheibe (3). Die mit Schaufelenden (4) versehenen Schaufelteile (5) sind fester Bestandteil der druckseitigen Deckscheibe (3), sie können aus dem Vollen herausgearbeitet werden. Zwar ist die hier gezeigte Nabe (2) ebenfalls fester Bestandteil der druckseitigen Deckscheibe (3), aber es ist ohne weiteres möglich, die Nabe (2) als separates Bauteil auszubilden.The example of an impeller of a turbomachine shown in FIG. 1 belongs to a multi-stage centrifugal pump for large delivery capacities. One impeller part (1) consists of the hub (2) and the pressure-side cover plate (3). The blade parts (5) provided with blade ends (4) are an integral part of the pressure-side cover plate (3) and can be worked out from the solid. Although the hub (2) shown here is also an integral part of the pressure-side cover disk (3), it is readily possible to design the hub (2) as a separate component.

Der andere Laufradteil (6) besteht aus der saugseitigen Deckscheibe (7) mit den fest damit verbundenen, die Schaufelanfänge (8) aufweisenden Schaufelteilen (7). Zwischen den beiden Laufradteilen (1, 6) sind mit doppelter Strichstärke die Trennebenen (A, B und C) eingezeichnet. Die Trennebenen (A und B) entsprechen dem die Schaufelkanäle begrenzenden Wandflächenverlauf der Deckscheiben (3, 7). Die Trennebene (C) teilt die Schaufellänge.The other impeller part (6) consists of the suction-side cover disc (7) with the fixedly connected blade parts (7) having the blade tips (8). The separation planes (A, B and C) are drawn in between the two impeller parts (1, 6) with a double line width. The parting planes (A and B) correspond to the wall surface course of the cover disks (3, 7) which delimits the vane channels. The parting plane (C) divides the blade length.

Aus der Fig. 2, die einem Schnitt gemäß der in Fig. 1 eingezeichneten Schnittlinie entspricht, ist der Verlauf der Schaufelteilung erkennbar. Die Trennebene (C) teilt die Schaufeln in zwei Teile und verläuft in axialer Richtung. Bei entsprechendem Bedarf ist auch jeder andere Verlauf der Trennebene (C) möglich. Sie weist in diesem Ausführungsbeispiel einen S-förmigen Verlauf auf, welcher die miteinander zu fügenden Teile sowohl zentriert als auch gleichzeitig gegen Verdrehung sichert. Diese formschlüssige Verbindung kann auch jeden anderen geeigneten, die gleiche Funktion gewährleistenden Verlauf aufweisen. Zwischen den über den Umfang nebeneinander verteilt angeordneten Schaufelteilen (5, 9) sind die Schaufelkanäle (10) des Laufrades ausgebildet.The course of the blade division can be seen from FIG. 2, which corresponds to a section according to the section line drawn in FIG. 1. The parting plane (C) divides the blades into two parts and runs in the axial direction. If required, any other course of the parting plane (C) is also possible. In this exemplary embodiment, it has an S-shaped course, which is the one with the other Parts to be joined are both centered and secured against rotation at the same time. This form-fitting connection can also have any other suitable course which ensures the same function. The blade channels (10) of the impeller are formed between the blade parts (5, 9) which are arranged next to one another over the circumference.

Die in den Figuren dargestellte Anordnung der Schaufelteile des Laufrades ist nicht zwingend. Es ist auch jede andere die Schaufelteile zu einem einheitlichen Ganzen zusammenfügende Anordnung möglich.The arrangement of the blade parts of the impeller shown in the figures is not mandatory. Any other arrangement which combines the blade parts into a unitary whole is also possible.

Es ist auch eine Anordnung der Schaufelteile auf den sie tragenden Laufradteil möglich, nach der wechselweise einem Schaufelteil (9) mit Schaufelanfang (8) ein Schaufelteil (5) mit Schaufelende (4) folgt. Dies hängt vom Einzelfall und der Form der Schaufelkanäle (10) ab. Falls eine Zuordnung der miteinander zu fügenden Teile in einer bestimmten Position verlangt wird, so kann dies durch eine abweichende Gestaltung der Trennebene oder eine besondere Anordnung von Schaufelteilen bewirkt werden.It is also possible to arrange the blade parts on the impeller part carrying them, after which a blade part (9) with blade start (8) is alternately followed by a blade part (5) with blade end (4). This depends on the individual case and the shape of the blade channels (10). If an assignment of the parts to be joined together in a specific position is required, this can be brought about by a different design of the parting plane or a special arrangement of blade parts.

Claims (6)

Laufrad in geschlossener und geteilter Ausführung für ein- oder mehrstufige Strömungsmaschinen, wobei zwischen saug- und druckseitiger Deckscheibe der Strömungsführung dienende Schaufeln angeordnet sind, dadurch gekennzeichnet, daß zwei oder mehrere Schaufeln in ihrer Länge geteilt ausgebildet sind, daß ein Laufradteil (1) mit einer die Schaufelkanäle (10) begrenzenden Deckscheibe (3) sowie Schaufeln und/oder Schaufelteilen (5) versehen ist und daß der andere Laufradteil (6) mit einer gegenüberliegenden, die Schaufelkanäle (10) begrenzenden Deckscheibe (7) sowie Schaufeln und/oder ergänzenden Schaufelteilen (9) versehen ist.Impeller in a closed and divided design for single or multi-stage turbomachines, with vanes serving to guide the flow between the suction and pressure side cover plates, characterized in that two or more vanes are divided in length so that an impeller part (1) with a the blade channels (10) delimiting cover disk (3) and blades and / or blade parts (5) is provided and that the other impeller part (6) with an opposite cover disk (7) delimiting the blade channels (10) and blades and / or additional blade parts (9) is provided. Laufrad nach Anspruch 1, dadurch gekennzeichnet, daß ein Laufradteil (6) mit Schaufelanfänge (8) aufweisenden Schaufelteilen (9) und der damit zusammenwirkende andere Laufradteil (1) mit Schaufelenden (4) aufweisenden ergänzenden Schaufelteilen (5) versehen ist.Impeller according to claim 1, characterized in that an impeller part (6) is provided with blade parts (9) having blade starts (8) and the other impeller part (1) interacting therewith is provided with additional blade parts (5) having blade ends (4). Laufrad nach Anspruch 1, dadurch gekennzeichnet, daß ein Laufradteil mit wechselweise angeordneten Schaufelanfängen (8) und Schaufelenden (4) aufweisenden Schaufelteilen (9, 5) und der damit zusammenwirkende andere Laufradteil mit ergänzenden wechselweise angeordneten Schaufelenden (4) und Schaufelanfänge (8) aufweisenden Schaufelteilen (9, 5) versehen ist.Impeller according to claim 1, characterized in that an impeller part with alternately arranged blade starts (8) and blade ends (4) having blade parts (9, 5) and the other impeller part interacting therewith with additional alternately arranged blade ends (4) and blade beginnings (8) Blade parts (9, 5) is provided. Laufrad nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß zwischen den miteinander zu verbindenden Laufradteilen (1, 6) mindestens drei Teilebenen (A, B, C) vorgesehen sind, wobei zwei Teilebenen (A, B) in der die Schaufelkanäle (10) begrenzenden Wandfläche der Deckscheibenebenen angeordnet sind, die einen Abstand zueinander aufweisen und die durch die in Richtung der Mittelachse verlaufende, die Schaufeln teilende dritte Teilebene (C) miteinander verbunden sind.Impeller according to claims 1 to 3, characterized in that at least three partial planes (A, B, C) are provided between the impeller parts (1, 6) to be connected to one another, two partial planes (A, B) in which the blade channels (10 ) delimiting wall surface of the cover plate planes, which are at a distance from one another and which are connected to one another by the third sub-plane (C) running in the direction of the central axis and dividing the blades. Laufrad nach den Ansprüchen 1 bis 4, dadurch gekennzeichnet, daß die Laufradteile (1, 6) durch eine im Bereich der Schaufelteilung angebrachte formschlüssige Steckverbindung miteinander verbunden sind.Impeller according to claims 1 to 4, characterized in that the impeller parts (1, 6) are connected to one another by a form-fitting plug-in connection in the area of the blade division. Laufrad nach den Ansprüchen 1 bis 5, dadurch gekennzeichnet, daß die die Schaufeln teilende Teilebene (C) keinen geradlinigen Verlauf aufweist.Impeller according to claims 1 to 5, characterized in that the partial plane (C) dividing the blades has no straight line.
EP92105851A 1991-04-27 1992-04-04 Split impeller Expired - Lifetime EP0511518B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4113831 1991-04-27
DE4113831A DE4113831A1 (en) 1991-04-27 1991-04-27 DIVIDED WHEEL

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EP0511518A1 true EP0511518A1 (en) 1992-11-04
EP0511518B1 EP0511518B1 (en) 1995-09-06

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AT (1) ATE127572T1 (en)
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Cited By (1)

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RU2459980C1 (en) * 2011-03-23 2012-08-27 Закрытое акционерное общество "Научно-исследовательский и конструкторский институт центробежных и роторных компрессоров им. В.Б. Шнеппа" Method of making radial-flow compressor impellers

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008013432A1 (en) 2008-03-10 2009-09-17 Man Turbo Ag Cover disc for a closed impeller

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US1849557A (en) * 1929-06-12 1932-03-15 M T Davidson Company Centrifugal pump
GB537727A (en) * 1940-04-03 1941-07-03 Coventry Climax Eng Ltd Improvements in centrifugal pumps
EP0153221A1 (en) * 1984-02-10 1985-08-28 Framatome Production method for a closed impeller

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DE858284C (en) * 1943-02-27 1952-12-04 Maschf Augsburg Nuernberg Ag Covered impeller for centrifugal machines
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SU885627A1 (en) * 1978-01-03 1981-11-30 Предприятие П/Я М-5095 Soil pump impeller
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Publication number Priority date Publication date Assignee Title
US1849557A (en) * 1929-06-12 1932-03-15 M T Davidson Company Centrifugal pump
GB537727A (en) * 1940-04-03 1941-07-03 Coventry Climax Eng Ltd Improvements in centrifugal pumps
EP0153221A1 (en) * 1984-02-10 1985-08-28 Framatome Production method for a closed impeller

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2459980C1 (en) * 2011-03-23 2012-08-27 Закрытое акционерное общество "Научно-исследовательский и конструкторский институт центробежных и роторных компрессоров им. В.Б. Шнеппа" Method of making radial-flow compressor impellers

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EP0511518B1 (en) 1995-09-06
ATE127572T1 (en) 1995-09-15
DE59203520D1 (en) 1995-10-12
DE4113831A1 (en) 1992-10-29

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