EP0511518B1 - Split impeller - Google Patents
Split impeller Download PDFInfo
- Publication number
- EP0511518B1 EP0511518B1 EP92105851A EP92105851A EP0511518B1 EP 0511518 B1 EP0511518 B1 EP 0511518B1 EP 92105851 A EP92105851 A EP 92105851A EP 92105851 A EP92105851 A EP 92105851A EP 0511518 B1 EP0511518 B1 EP 0511518B1
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- EP
- European Patent Office
- Prior art keywords
- impeller
- vane
- parts
- blade
- dividing
- 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
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Classifications
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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-PS 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 formed 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.
- a split impeller is also known from GB-A 537 727.
- the individual blades arranged between the cover disks can be wholly or partly part of a cover disk.
- the cover plate parts are held together by rivets or screws provided in the area of the blades. This measure limits the Range of possible blade shapes considerably and requires unnecessarily large blade thicknesses.
- the invention has for its object to develop a cutting, pressing or casting technically manufactured impeller in a closed and divided design. This object is achieved according to the features of the main claim.
- at least two blades are divided in length.
- the impeller parts to be connected are fitted by means of a form-fitting plug connection. (The impeller parts to be connected can be centered by corresponding overlaps in the area of the blade parts to be connected.
- An embodiment of the invention provides for this 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 part plane profile, 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 were 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 so 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 cheap manufacture easily passed between the blade parts of the respective impeller part and so the blade contour can be worked out.
- 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. This also ensures that the components are prevented from rotating with one another. 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.
- 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 pumped medium.
- the blades are, as it were, divided in their blade length, the separation point running transversely to the blade length.
- the invention generally offers this advantage through the blade division.
- the form-fitting plug connection is attached to at least two blades. The remaining blades can alternately be part of the impeller parts or cover disks and rest sealingly against them.
- 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 retainer (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 holder (2) shown here is also an integral part of the pressure-side cover plate (3), it is easily possible to design the holder (2) as a separate component.
- the other impeller part (6) consists of the suction-side cover plate (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 double line width.
- the parting planes (A and B) correspond to the wall surface course of the cover disks (3, 7) delimiting the blade 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 along the section line drawn in FIG. 1.
- the parting plane (C) divides the blades into two parts and runs in the axial direction. If necessary, any other course of the parting plane (C) is also possible. In this exemplary embodiment, it has an S-shaped course which both centers the parts to be joined together and at the same time secures them against rotation. 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 which carries 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 certain 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
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-PS 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-PS 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 formed 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.
Ebenfalls ein geteiltes Laufrad ist aus der GB-A 537 727 bekannt. Die zwischen den Deckscheiben angeordneten einzelnen Schaufeln können dabei ganz oder teilweise Bestandteil einer Deckscheibe sein. Den Zusammenhalt der Deckscheibenteile bewirken Niete oder Schrauben, die im Bereich der Schaufeln vorgesehen sind. Diese Maßnahme schränkt aber den Verwendungsbereich von möglichen Schaufelformen erheblich ein und erfordert unnötig große Schaufeldicken.A split impeller is also known from GB-A 537 727. The individual blades arranged between the cover disks can be wholly or partly part of a cover disk. The cover plate parts are held together by rivets or screws provided in the area of the blades. This measure limits the Range of possible blade shapes considerably and requires unnecessarily large blade thicknesses.
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 den Merkmalen 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 durch eine formschlüssige Steckverbindung. (Eine Zentrierung der miteinander zu verbindenden Laufradteile kann durch entsprechende Überlappungen im Bereich der zu verbindenden Schaufelteile erfolgen.The invention has for its object to develop a cutting, pressing or casting technically manufactured impeller in a closed and divided design. This object is achieved according to the features of the main claim. According to this solution, at least two blades are divided in length. In the area of their division, the impeller parts to be connected are fitted by means of a form-fitting plug connection. (The impeller parts to be connected can be centered by corresponding overlaps in the area of the blade parts to be connected.
Eine 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.An embodiment of the invention provides for this 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 part plane profile, 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 were 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 fully or partially machining, 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 results in a considerable minimization of test bench tests is possible. There is the possibility of machining or reworking 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 so 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 cheap 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. This also ensures that the components are prevented from rotating with one another. 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.
Die Ausgestaltungen der Ansprüche 3 und 4 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. Zur Erlangung einer sicheren Zentrierwirkung ist die formschlüssige Steckverbindung an mindestens zwei Schaufeln angebracht. Die restlichen Schaufeln können hierbei wechselweise Bestandteil der Laufradteile bzw. Deckscheiben sein und dichtend an diesen anliegen.The configurations of
Durch die zwischen den miteinander zu verbindenden Laufradteilen vorgesehenen mindestens drei Teilebenen, wobei zwei Teilebenen in der die Schaufelkanäle begrenzenden Wandfläche der Deckscheibenebenen angeordnet sind die einen axialen Abstand zueinander aufweisen, und durch die in Richtung der Mittelachse verlaufende, die Schaufeln teilende dritte Teilebene, liegen die jeweils freistehenden Längsseiten der Schaufelteile dichtend an dem den Schaufelkanal begrenzenden gegenüberliegenden Laufradteil bzw. der Deckscheibe an.By means of the at least three partial planes provided between the impeller parts to be connected to one another, two partial planes in which the blade channels delimit Wall surface of the cover plate planes are arranged which are axially spaced from one another, and due to the third partial plane running in the direction of the central axis and dividing the blades, the free-standing longitudinal sides of the blade parts lie sealingly against the opposite impeller part or cover plate which delimits the blade channel.
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.
- 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 Habe (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 Habe (2) ebenfalls fester Bestandteil der druckseitigen Deckscheibe (3), aber es ist ohne weiteres möglich, die Habe (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 retainer (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 holder (2) shown here is also an integral part of the pressure-side cover plate (3), it is easily possible to design the holder (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 plate (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 double line width. The parting planes (A and B) correspond to the wall surface course of the cover disks (3, 7) delimiting the blade 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 along the section line drawn in FIG. 1. The parting plane (C) divides the blades into two parts and runs in the axial direction. If necessary, any other course of the parting plane (C) is also possible. In this exemplary embodiment, it has an S-shaped course which both centers the parts to be joined together and at the same time secures them against rotation. 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 single 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 which carries 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 certain position is required, this can be brought about by a different design of the parting plane or a special arrangement of blade parts.
Claims (4)
- An impeller in a closed and divided design for single-or multi-stage fluid flow machines, vanes (5 and 9) serving for flow guidance being arranged between the intake and delivery cover plates (1 and 6), the vanes are divided longitudinally, an impeller part (1) is provided with a cover plate (3) delimiting the vane channels (10) and vane parts (5) and another impeller part (6) is provided with an opposite cover plate (7) delimiting the vane channels (10) and supplementary vane parts (9) between the impeller parts (1 and 6) to be connected with each other at least three dividing planes (A, B and C) are provided, two dividing planes (A and B) being arranged in the wall surface, delimiting the vane channels (10), of the cover plate planes, which are placed at a distance from one another and are connected with each other by the third dividing plane (C) dividing the vanes and extending in the direction of the center axis, characterized in that the impeller parts (1 and 6) are connected together by a plug connection, having a positive locking effect, arranged adjacent to the vane division and preventing rotation.
- The impeller as claimed in claim 1, characterized in that the dividing plane (C) dividing the vanes is not straight in form.
- The impeller as claimed in claim 1 or in claim 2, characterized in that one impeller part (6) is provided with vane parts (9) having vane starts (8) and the other impeller part (1) cooperating therewith is provided with supplementary vane parts (5) having vane ends (4).
- The impeller as claimed in any one of the claims 1 through 3, characterized in that on impeller part is provided with vane parts (9 and 5) having alternatingly arranged vane starts (8) and vane ends (4) and the other impeller part cooperating therewith is provided with supplementary vane ends (4) arranged alternatingly and with vane parts (9 and 5) having vane starts (8).
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0511518A1 EP0511518A1 (en) | 1992-11-04 |
| EP0511518B1 true EP0511518B1 (en) | 1995-09-06 |
Family
ID=6430508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92105851A Expired - Lifetime EP0511518B1 (en) | 1991-04-27 | 1992-04-04 | Split impeller |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0511518B1 (en) |
| AT (1) | ATE127572T1 (en) |
| DE (2) | DE4113831A1 (en) |
Families Citing this family (2)
| 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 |
| 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 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE550461C (en) * | 1932-05-11 | Aeg | Multi-part impeller for centrifugal pumps or blowers | |
| 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 |
| DE858284C (en) * | 1943-02-27 | 1952-12-04 | Maschf Augsburg Nuernberg Ag | Covered impeller for centrifugal machines |
| DD95761A1 (en) * | 1972-03-16 | 1973-02-12 | ||
| SU885627A1 (en) * | 1978-01-03 | 1981-11-30 | Предприятие П/Я М-5095 | Soil pump impeller |
| SU1059221A1 (en) * | 1982-05-25 | 1983-12-07 | Предприятие П/Я А-3513 | Axial-radial turbo-machine wheel |
| FR2559544B1 (en) * | 1984-02-10 | 1988-07-08 | Creusot Loire | PROCESS FOR PRODUCING A CLOSED BLADE WHEEL AND WHEEL OBTAINED BY MEANS OF THIS PROCESS |
-
1991
- 1991-04-27 DE DE4113831A patent/DE4113831A1/en not_active Withdrawn
-
1992
- 1992-04-04 DE DE59203520T patent/DE59203520D1/en not_active Expired - Fee Related
- 1992-04-04 EP EP92105851A patent/EP0511518B1/en not_active Expired - Lifetime
- 1992-04-04 AT AT92105851T patent/ATE127572T1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| ATE127572T1 (en) | 1995-09-15 |
| EP0511518A1 (en) | 1992-11-04 |
| DE4113831A1 (en) | 1992-10-29 |
| DE59203520D1 (en) | 1995-10-12 |
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