EP0911528B1 - Laufrad aus Blech - Google Patents
Laufrad aus Blech Download PDFInfo
- Publication number
- EP0911528B1 EP0911528B1 EP98120083A EP98120083A EP0911528B1 EP 0911528 B1 EP0911528 B1 EP 0911528B1 EP 98120083 A EP98120083 A EP 98120083A EP 98120083 A EP98120083 A EP 98120083A EP 0911528 B1 EP0911528 B1 EP 0911528B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- impeller
- base plate
- impeller according
- hub
- blades
- 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
-
- 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 for a centrifugal pump the preamble of claim 1.
- the invention relates continue a process for producing such multi-part Impellers.
- Impellers for centrifugal pumps are usually made Injection molded plastic because this method is a is a very simple procedure, with the varied Impeller designs can be realized.
- This Impellers made of plastic show especially when They promote hot media with temperatures around 100 degrees Celsius or more are used in the long run increased wear and poor dimensional stability.
- the Blade surfaces are individually formed from sheet metal and individually over its full length with the load-bearing elements of the Impeller welded.
- the Impeller due to the large heat flow that occurs during welding occurs between the individual parts, very badly deformed, which affects the concentricity. Therefore it is often necessary to retrofit a wheel made in this way to judge.
- a metallic impeller with many welds is also one of the welded joints exposed to excessive corrosion, especially then is increased when corrosive media such as chemicals are conveyed should be. In such a case, show such welded impellers made of normal sheet a clearly reduced lifespan.
- An impeller of this type is e.g. from FR 0 153 221 known.
- One version of this impeller consists of a metallic base plate to which several blade surfaces are welded on. Each of the blade surfaces contributes to the Intake manifold facing top several protrusions via a clamping effect with corresponding recesses on the Bottom of the intake manifold are connected.
- each blade in the edge area integrally formed in the plane of the edge area of the blade run. These tabs are in slots in the base plate and inserted in the cover plate and in it on the back of the respective plates over a relatively long distance welded.
- the object of the invention is an impeller of the beginning mentioned type and a manufacturing process for such Improve impellers so that the impeller temperature and is corrosion-resistant and due to its design features simple, inexpensive and true to shape is. Furthermore, the remaining disadvantages mentioned above be overcome.
- each Scoop one in two dimensions in itself i.e. spatial curved surface forms at least at an angle two tab-shaped surface sections / tabs are formed, the imprints of the base plate and the intake manifold or the cover plate.
- Each forms Bucket surface is a curved surface, i.e. that a Bucket surface not only in one dimension, that is for example about the axis of rotation of the hub, but also still perpendicular to it and thus around its normal in another Dimension is curved.
- the lobe-shaped formed on the blade surfaces Surface sections serve as a connecting element to the Buckets both on the base plate and on the To fix the intake manifold or the cover plate at certain points. There is only a connection through these tabs / tabs between base plate and the intake manifold or the Cover plate.
- the rags / tabs are the only one Element where the spot welding takes place. This has the advantage that only a few areas of the Impeller are exposed to heat flow through welding, whereby the dimensional stability of the Impeller remains guaranteed.
- Each tab can advantageously essentially parallel to an embossing in the base plate and / or the Suction nozzle / cover plate.
- the impressions are provided to prevent the on the Base plate and the intake manifold or the cover plate overlying rag of the shovel swirling the Conveyed medium.
- the hub of the drive axle Impeller is preferably designed such that it Shape of a pot with an end face on the bottom has whose wall in at least three sections has moved in.
- the pot shape of the hub by simple forming techniques, such as e.g. Thermoforming can be made.
- the three-part Fit to the axis makes it easier Assembly process, the seat breaks a better Allow system compensation between axis and hub.
- the hub it is provided that on the side facing away from the bottom surface Flange is formed, which as the axis press Assembly support is used so that a force on the Wheel center is avoided.
- the base plate to be attached to the hub which the Forms the basis for all parts of the impeller, points a central bulge, which is also used as an investment and Sealing surface for the blade surfaces is used.
- Such Construction is particularly simple thanks to deep-drawing techniques produced.
- Flaps / tabs of the individual blade surfaces in impressions should, as mentioned above, entangle the To prevent the medium, it makes sense that the Base plate these impressions and / or slots in one outer area, i.e. preferably at the edge of the plate, has, since these edge areas in the production by Welding tools are easy to reach.
- the number of Embossing is on the number of blades Voted.
- the suction side of the impeller can be changed easily Cover plate with a central hole or e.g. also be formed by an intake manifold.
- the Intake port preferred from a design point of view the shape of a cylinder, at the end of which an annular one Flange is formed, which is to accommodate the tabs / tabs of the individual blade surfaces.
- annular flange of the nozzle one of the number of blades corresponding number of impressions and / or slots has, which additionally have central elevations, which are commonly referred to as weld nipples.
- the flange of the intake manifold opposite the outer surface arranged at an obtuse angle.
- the impeller it is possible that the Not each shovel with the base plate and the Intake manifold is connected, but that they are integral with the base plate, an additional plate, a front Cover plate and / or is connected to the intake manifold.
- all blades are formed from a sheet metal surface, whereby the sheet surface as such is connected to the base plate. Here you can weld the blade surfaces individually remain under.
- the manufacture of the impeller according to the invention is based on how already mentioned above, on a process in which the individual parts made of sheet metal, especially stainless steel sheet are produced, these parts by welding, especially by resistance welding, more preferably Way by short-term resistance welding to each other get connected.
- the base material advantageously for each individual part made of flat sheet metal cut and / or punched and formed into the final form.
- punching technology is e.g. also possible for cutting the sheets Use laser cutting machines.
- the forming parameters should always be selected so that the stresses arising from the design are as low as are possible to prevent material damage. Is also make sure that after cutting / punching none Burr-forming edges are facing out to one too Avoid risk of injury to people who on Manufacturing processes are involved.
- the hub, the base plate and the intake manifold or Cover plate After shaping and before welding the parts the hub, the base plate and the intake manifold or Cover plate by cutting and / or punching it surrounding remaining sheet metal separated. On the other hand, they remain individual blades until after welding through the surrounding sheet metal interconnected.
- the work can be carried out with one another connected blades with the base plate and / or the Intake connectors are welded. Only after welding the blades are separated from the piece of sheet metal connecting them, e.g. separated from a ring.
- the shape of the hub is preferred Process steps in that first a pot shape the flat sheet is formed. This can e.g. through a or several deep-drawing work steps. In one Another step, which is a Extrusion can act, the annular Projection molded on the bottom of the hub. Here is special to ensure that there is enough material to the To perform forming. Otherwise one could Result in structural damage. In another step the jacket wall becomes an at least three-part fit retracted for the axle, which is then taken up for inclusion the axis is calibrated. It is worth noting that the work steps also in a different order can be executed.
- the hub is, as already mentioned, after the shaping measures separated from the rest of the surrounding sheet metal.
- the Separation should be carried out so that there is a flange on the hub remains, which serves as an assembly support during the pressing of the Axis serves.
- the base plate is preferably made in that first into a round basic shape of the flat sheet central bulge is formed. This bulge can be in simply e.g. by single or multiple deep drawing will be realized. In another step, in one annular area of the outer edge of the base plate forms a number of blades corresponding to the number of blades Imprints and / or slots introduced to accommodate serve the tabs of the blade surfaces.
- This has the advantage that all or at least a large number stamped from blade surfaces simultaneously and then can also be edited at the same time.
- the blade surfaces during the Processing all connected e.g. by an outside Sheet metal ring are interconnected.
- the blade surfaces are then welded all at the same time or successively connected to the base plate and first then separated from each other.
- This procedure has the Advantage of having a large number of blades, ideally all blades at the same time on the base plate Attachment can be aligned.
- the Blade surfaces manufactured so that the basic shape of the Cut out surfaces from flat sheet metal, in particular is punched out.
- the rags used to attach the intake manifold.
- the blade surfaces bent This can be done in particular by beads. The Areas that form the outlet openings of the impeller are cut free in another step, especially punched out. After that, the blade surfaces on the tab through which there is still a connection between the individual Blade surfaces exist among each other and those for fastening serves on the base plate, superscript.
- the shape of the intake manifold takes place in that First a pot-shaped depression in the flat sheet is formed, on the side facing away from the bottom of the pot cylindrical mantle that extends through the molded recess results in a flange-shaped surface remaining.
- the Shaping takes place e.g. in a simple way by deep drawing.
- the bottom of the pot becomes one Cut out or punched out collar.
- the Collar put through and at the same time or in time Order the flange surface at an angle to the jacket hired.
- the flange surface a number of impressions corresponding to the number of blades pressed in, their shape corresponding to the lobes of the blades are trained and in the middle of additional surveys be pressed in via the spot weld is made.
- Figure 1A shows a sectional view of the basic structure of an impeller according to the invention Sheet.
- the hub 1 is at the location of the projection 7 connected to a base plate 2, which has a central bulge 10 has and as a contact surface for the blade surface edges serves.
- FIG 1B which is a more detailed view of the The outlet openings of the impeller shows that the Blade surfaces 4 with a tab-shaped surface section 11 in an impression 5 of the base plate and with the other lobe-shaped section 12 in an impression 6 of Insert intake manifold 3.
- This figure also shows that the tabs / tabs 11 and 12 directly at an angle the blade surfaces 4 are formed.
- the blade surface 4 itself extends in the area between base plate 2 and the intake manifold 3.
- the connection between the Intake 3 and the base plate 2 takes place in this Example only on the tabs 11 and 12 of the Blade areas 4. It cannot be seen in detail here that the blade surface 4 in itself, i.e.
- Figure 1A also shows an alternative Design of the hub in which a flange 8 is molded to serve as an assembly support.
- the hub 1 of the impeller according to the invention is in the Figure 2 shown in detail.
- the lower part of the Figure 2 shows the hub 1 in a side view Sectional view.
- the hub shown is in the shape of a pot with an end face 13 on which a annular projection 7 is integrally formed. This The connection point at the base plate forms a projection 2 is welded to the hub.
- the alternative embodiment of the hub at the flange 8 mentioned above directly to that of the bottom surface 13 facing away from the hub 1 is formed.
- a bottom view is in the upper part of Figure 2 shown.
- the wall 14 of the hub is in three sections 9 moved in to get a good investment balance for the to form the axis of the drive motor to be pressed.
- part of this illustration is the alternative form of Hub shown with the flange 8.
- Figure 3 shows the intake 3 of the impeller according to the invention. This essentially has the Shape of a cylinder at one end an annular Flange 15 is formed, which is based on the outer Shell surface is arranged at an obtuse angle.
- this flange 15 has one of the number of blades corresponding number of impressions 6, which for reasons of Clarity not all are shown here. each These impressions have a central one as a welding aid Survey 17 on.
- the base plate 2 of the impeller is shown in Figure 4 shown.
- it points on outer edge a number of corresponding to the number of blades Imprints 5, which for receiving the tabs 11 of the Serve blade surfaces.
- These impressions can as well the impressions 6 of the intake manifold 3 central elevations exhibit.
- Figure 5 the division is in a hand sketch a flat sheet is shown in several blade surfaces.
- the size and number of the desired blade surfaces 4 depends from external predetermined parameters.
- Figure 5 shows only the arrangement of the blade surfaces on the sheet and a basic shape of the surfaces. In the curved shape of the shaped blade surfaces can cannot be taken from this illustration.
- the basic material is made for each one Part, i.e. for the hub, base plate, blades and intake manifold punched out of flat sheet metal. During the punching process, it is on it made sure that no burr-forming edges on the individual Parts arise.
- hub 1, Base plate 2 and intake manifold 3 from the rest surrounding sheet metal separately. Only the blade surfaces 4, which are still connected to each other after the shaping, are first welded to the base plate 2 and then separated from each other.
- FIG. 6 shows an explanatory overview individual work steps Ia - VIa for producing a hub for the impeller according to the invention.
- a first step Ia As mentioned above, the base material for the hub is made from the flat sheet metal punched out. Then over two Thermoforming steps IIa and IIIa the pot shape of the hub 1 from the flat sheet formed.
- work step IVa a compression of the bottom of the pot of the annular projection 7 Shaped hub.
- the shell wall of the hub in the crotch Va to a fit for the axis in three sections 9 retracted and calibrated around an axis with large To be able to record fit.
- step VIa Completely molded hub through from the surrounding rest of the sheet another punch separately. This is done so that at the Hub the above flange to simplify assembly stop.
- Process steps Ib-Vb for the production of the base plate 2 are explained in more detail by Figure 7.
- a first step Ib the basic material for the Base plate 2 punched out of the flat sheet.
- two Thermoforming steps IIb and IIIb then become the middle one Bulge shaped into the basic shape of the sheet.
- the edge of the so shaped is then Base plate 2 provided with several embossings 5, which for Serve receiving the tabs 11 of the blades 4.
- the number of Impressions correspond to the number of blades.
- the last step Vb is the molded base plate 2 from the surrounding rest of the sheet separately.
- FIG 8 shows the process steps Ic - VIc Production of the intake manifold 3.
- the base material is also made for the intake manifold punched out of the sheet.
- the second step IIc Deep-drawing work step into a pot-shaped depression Sheet metal drawn, on the side facing away from the bottom of the pot a flange-shaped surface remains.
- the pot bottom is then punched out to a collar 16, after which this is put through in step IVc.
- step Vc becomes one of the number of blades in the surface of the flange corresponding number of impressions 6 and in the middle one elevation 17 each is pressed in.
- the last step VIc is also the intake manifold 3 from the remaining sheet separated out.
- Steps Id - VIId to produce these blade surfaces illustrate the Figures 9 and 10.
- the first step Id are from the Base material of the sheet which is shown in Figure 10 with A and B designated areas punched out.
- the areas C are punched out of the sheet.
- the tabs 12, which are used for Attachment of the intake manifold 3 serve, from the sheet metal level bent.
- step IVd the individual Blade surfaces 4 are curved. This bending is done by Corrugations.
- Figure 11 also shows another alternative, the sheet into several areas for the blade surfaces 4 divide. Is it e.g. provided the impeller as in in this case, with 8 slightly larger blade areas equip, it is striking that some areas of the Display areas 4 would overlap on the sheet. Accordingly, in this case the sheet for 4 contiguous blade surfaces punched out and machined, as described above. The corresponding division on the Sheet metal is shown in Figure 11 by continuous lines shown. After shaping, the first 4 finished blade surfaces on the base plate welded. The process is then followed by a repeated another sheet for the second 4 blade surfaces, which is then also offset by a division on the Base plate 2 are attached. This procedure is also for any other number of blade areas divisible, each time a certain number of Blade surfaces 4 simultaneously on the base plate 2 aligned and welded to it.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
- Fig. 1A
- einen Schnitt durch ein erfindungsgemäßes Laufrad,
- Fig. 1B
- eine Aufsicht im Detail auf die Austrittsöffnungen des Laufrades,
- Fig. 2
- Schnittansichten der Nabe eines erfindungsgemäßen Laufrades,
- Fig. 3
- Schnittansichten des Ansaugstutzens eines erfindungsgemäßen Laufrades,
- Fig. 4
- einen Schnitt durch die Grundplatte eines erfindungsgemäßen Laufrades
- Fig. 5
- eine skizzierte Aufteilung eines ebenen Bleches für die Anordnung der Schaufelflächen mit verschiedenen Aufteilungsmöglichkeiten
- Fig. 6
- mehrere symbolisierte Verfahrensschritte zur Herstellung der Nabe eines erfindungsgemäßen Laufrades
- Fig. 7
- mehrere symbolisierte Verfahrensschritte zur Herstellung der Grundplatte eines erfindungsgemäßen Laufrades
- Fig. 8
- mehrere symbolisierte Verfahrensschritte zur Herstellung des Ansaugstutzens eines erfindungsgemäßen Laufrades
- Fig. 9
- mehrere symbolisierte Verfahrensschritte zur Herstellung der Schaufelflächen eines erfindungsgemäßen Laufrades
- Fig. 10
- Darstellung der aus einem Blech zur Bildung der Schaufeln auszustanzenden Bereiche
- Fig. 11
- eine alternative Blechaufteilung mit angedeuteten Schaufelflächen.
Claims (24)
- Laufrad für eine Kreiselpumpe, das aus mehreren Teilen besteht, wobei an einer die Achse des Pumpenmotors aufnehmenden Nabe (1) eine hintere Grundplatte (2) befestigt ist, auf der mehrere das Medium fördernde Schaufeln (4) angeordnet sind, die einen vorderen Ansaugstutzen (3) bzw. eine vordere Abdeckplatte mit einer Ansaugöffnung tragen, wobei zumindest die Grundplatte (2) und die Schaufeln (4) aus Blech, insbesondere aus Edelstahlblech geformt sind,
dadurch gekennzeichnet, daß jede Schaufel (4) eine in zwei Dimensionen in sich gebogene Fläche bildet, an die unter einem Winkel mindestens zwei lappenförmige Flächenabschnitte/Laschen (11,12) angeformt sind, die in Einprägungen (5,6) der Grundplatte (2) und des Ansaugstutzens (3) bzw. der Abdeckplatte einliegen. - Laufrad nach Anspruch 1, dadurch gekennzeichnet, daß jede Lasche/jeder Flächenabschnitt aus der Ebene der Schaufelfläche abgebogen ist.
- Laufrad nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß jede Lasche/jeder Flächenabschnitt im wesentlichen parallel zu einer Einprägung in der Grundplatte und/oder dem Ansaugstutzen/der Abdeckplatte liegt.
- Laufrad nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die Nabe (1) des Laufrades die Form eines Topfes mit einer stirnseitigen Bodenfläche (13) aufweist, dessen Wand (14) in mindestens drei Abschnitten (9) eingezogen ist.
- Laufrad nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß bei der Nabe (1) des Laufrades an der stirnseitigen Bodenfläche (13) ein ringförmiger Vorsprung (7) einstückig angeformt ist.
- Laufrad nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß bei der Nabe (1) des Laufrades an der der Bodenfläche (13) abgewandten Seite des Topfes ein Flansch (8) angeformt ist.
- Laufrad nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die an der Nabe (1) befestigte Grundplatte (2) eine mittige Ausbauchung (10) aufweist.
- Laufrad nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die Grundplatte (2) an einem äußeren Bereich eine der Schaufelzahl entsprechende Anzahl von Einprägungen (5) aufweist.
- Laufrad nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß der Ansaugstutzen (3) des Laufrades die Form eines Zylinders aufweist, an dessen einem Ende ein ringförmiger Flansch (15) angeformt ist.
- Laufrad nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß der Flansch (15) des Ansaugstutzens (3) eine der Schaufelzahl entsprechende Anzahl von Einprägungen (6) aufweist, wobei die Einprägungen (6) mittige Erhebungen (17) aufweisen.
- Laufrad nach-einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die Flanschfläche (15) des Ansaugstutzens (3) unter einem stumpfen Winkel, bezogen auf die äußere Mantelfläche angeordnet ist.
- Laufrad nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die Schaufeln (4) einstückig mit der . hinteren Grundplatte (2), einer zusätzlichen Platte, einer vorderen Abdeckplatte und/oder mit dem Ansaugstutzen (3) verbunden sind.
- Verfahren zur Herstellung eines Laufrades, das aus mehreren Teilen besteht, nach einem der vorhergehenden Ansprüche, bei dem die einzelnen Teile aus Blech, insbesondere aus Edelstahlblech hergestellt und durch Widerstandsverschweißung, insbesondere Kurzzeit-Widerstandsverschweißung miteinander verbunden werden und wobei die Flächenabschnitte/Laschen in Einprägungen der Grundplatte und des Ansaugstutzens bzw. der Abdeckplatte einliegen, dadurch gekennzeichnet, daß in einem der Arbeitsschritte die mindestens zwei Flächenabschnitte/Laschen der Schaufeln in Einprägungen der Grundplatte und/oder des Ansaugstutzens bzw. der Abdeckplatte eingelegt werden, und daß in einem weiteren der Arbeitsschritte mehrere untereinander verbundene Schaufeln (4) mit der Grundplatte (2) und/oder dem Ansaugstutzen/der Abdeckplatte (3) verschweißt werden.
- Verfahren zur Herstellung eines Laufrades nach Anspruch 13, dadurch gekennzeichnet, daß die Schaufeln (4) erst nach dem Anschweißen an die Grundplatte (2) und/oder den Ansaugstutzen voneinander getrennt werden.
- Verfahren zur Herstellung eines Laufrades nach einem der Ansprüche 13 oder 14, dadurch gekennzeichnet, daß das Blechmaterial für eine bestimme Anzahl, insbesondere für alle Schaufelflächen (4) zusammenhängend aus einer Blech-Fläche geschnitten oder gestanzt und anschließend zu den Schaufelflächen (4) geformt wird.
- Verfahren zur Herstellung eines Laufrades nach einem der Ansprüche 13 bis 15, dadurch gekennzeichnet, daß das Grundmaterial für jedes Teil aus ebenem Blech geschnitten und/oder gestanzt und durch Umformung in die endgültige Form gebracht wird.
- Verfahren zur Herstellung eines Laufrades nach einem der Ansprüche 13 bis 16, dadurch gekennzeichnet, daß Nabe (1), Grundplatte (2) und Ansaugstutzen (3) nach der Formgebung von dem umgebenden restlichen Blech durch Schneiden und/oder Stanzen getrennt wird.
- Verfahren zur Herstellung eines Laufrades nach einem der Ansprüche 13 bis 17, dadurch gekennzeichnet, daß nach dem Schneiden/Stanzen keine gratbildenden Kanten nach außen stehen.
- Verfahren zur Herstellung eines Laufrades nach einem der Ansprüche 13 bis 18, dadurch gekennzeichnet, daß zur Formgebung der Nabe (1)zuerst eine Topfform aus dem ebenen Blech gebildet wird,in einem weiteren Arbeitsschritt der ringförmige Vorsprung (7) am Boden der Nabe (1) geformt wird,in einem weiteren Schritt die Mantelwand der Nabe (1) zu einer wenigstens dreiteiligen Paßform für die Achse in drei Abschnitten (9) eingezogen wird undin einem weiteren Schritt die Paßform in der Nabe (1) kalibriert wird.
- Verfahren zur Herstellung eines Laufrades nach einem der Ansprüche 13 bis 19, dadurch gekennzeichnet, daß die fertig geformte Nabe (1) von dem Rest des Bleches getrennt wird, wobei ein Flansch (8) an der Nabe (1) bestehen bleibt.
- Verfahren zur Herstellung eines Laufrades nach einem der Ansprüche 13 bis 20, dadurch gekennzeichnet, daß zur Formung der Grundplatte (2)zuerst in eine Grundform des ebenen Bleches eine mittige Ausbauchung (10) geformt wird undin einem weiteren Schritt in einem ringförmigen Bereich, der den äußeren Rand der Grundplatte (2) bildet, eine der Schaufelzahl entsprechende Anzahl von Einprägungen (5) eingebracht werden.
- Verfahren zur Herstellung eines Laufrades nach einem der Ansprüche 13 bis 21, dadurch gekennzeichnet, daß zur Formung der Schaufelflächen (4)zuerst die Grundform der Schaufelflächen (4) aus einem ebenen Blech ausgeschnitten, insbesondere ausgestanzt wird,in einem weiteren Arbeitsschritt die Lappen (12), die zur Befestigung des Ansaugstutzens (3) dienen, abgebogen werden,in einem weiteren Schritt die Schaufelflächen (4), insbesondere durch Sicken gebogen werden,in einem weiteren Schritt die Bereiche, die die Austrittsöffnungen des Laufrades bilden, freigeschnitten, insbesondere freigestanzt werden undin einem weiteren Schritt die Schaufelflächen (4) hochgestellt werden.
- Verfahren zur Herstellung eines Laufrades nach einem der Ansprüche 13 bis 22, dadurch gekennzeichnet, daß zur Formgebung des Ansaugstutzens (3)zuerst in das Blech eine topfförmige Vertiefung gezogen wird, wobei an der dem Topfboden abgewandten Seite des zylindrischen Mantels eine flanschförmige Fläche (15) stehen bleibt,in einem weiteren Schritt der Topfboden bis auf einen Kragen ausgeschnitten oder ausgestanzt wird,in einem weiteren Schritt der Kragen durchgestellt und gleichzeitig oder in zeitlicher Reihenfolge die Flanschfläche (15) in einem Winkel zum Mantel angestellt wird undin einem weiteren Schritt in die Flanschfläche (15) eine der Schaufelzahl entsprechene Anzahl von Einprägungen (6) eingepreßt werden, deren Form entsprechend der Lappen (12) der Schaufeln (4) ausgebildet und in deren Mitte Erhebungen (17) eingepreßt werden.
- Verfahren zur Herstellung eines Laufrades nach einem der Ansprüche 13 bis 23, dadurch gekennzeichnet, daß die Oberfläche des Laufrades durch eine Lackierung, insbesondere eine kataphoretische Lackierung, geschützt wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19746850 | 1997-10-23 | ||
DE19746850A DE19746850A1 (de) | 1997-10-23 | 1997-10-23 | Laufrad aus Blech |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0911528A1 EP0911528A1 (de) | 1999-04-28 |
EP0911528B1 true EP0911528B1 (de) | 2003-02-26 |
Family
ID=7846406
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98120083A Expired - Lifetime EP0911528B1 (de) | 1997-10-23 | 1998-10-23 | Laufrad aus Blech |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0911528B1 (de) |
DE (2) | DE19746850A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8535001B2 (en) | 2008-01-19 | 2013-09-17 | Wilo Ag | Fastening of the rotor of a centrifugal pump |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10156106A1 (de) * | 2001-11-16 | 2003-05-28 | Isaak Klaus | Verfahren zum Verbinden von Blechteilen |
DE102022201438A1 (de) | 2022-02-11 | 2023-08-17 | Robert Bosch Gesellschaft mit beschränkter Haftung | Pumpenrotor, sowie Pumpenlaufrad für einen Pumpenrotor |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE937120C (de) * | 1943-06-17 | 1955-12-29 | Maschf Augsburg Nuernberg Ag | Laufrad fuer Schleuderverdichter |
US3107627A (en) * | 1958-06-27 | 1963-10-22 | Stalker Corp | Rotor for radial flow pumping means |
DE1402836A1 (de) * | 1960-02-15 | 1969-01-23 | Firth Cleveland Ltd | Verfahren zur Herstellung von Rotoren,z.B. fuer Geblaese |
DK113340B (da) * | 1966-08-09 | 1969-03-10 | Grundfos As | Gennemstrømningsapparat, især løbehjul eller ledeapparat til centrifugalpumpe, og fremgangsmåde til fremstilling af samme. |
JPS595898A (ja) * | 1982-07-02 | 1984-01-12 | Hitachi Ltd | ポンプの鋼板製羽根車 |
FR2559544B1 (fr) * | 1984-02-10 | 1988-07-08 | Creusot Loire | Procede de realisation d'une roue a aubes fermee et roue obtenue au moyen de ce procede |
DE3517499A1 (de) * | 1985-05-15 | 1986-11-20 | Klein, Schanzlin & Becker Ag, 6710 Frankenthal | Laufrad |
US4720242A (en) * | 1987-03-23 | 1988-01-19 | Lowara, S.P.A. | Centrifugal pump impeller |
DE3731161C2 (de) * | 1987-09-17 | 1996-12-12 | Klein Schanzlin & Becker Ag | Kreiselpumpenlaufrad |
DE3872139D1 (de) * | 1987-09-30 | 1992-07-23 | Winkelmann & Pannhoff Gmbh | Verfahren zur herstellung von foerder und/oder leiteinrichtungen fuer stroemungsmaschinen und nach diesem verfahren hergestelltes radial-laufrad, insbesondere kuehlmittelpumpenrad fuer brennkraftmaschinen. |
DE4008216A1 (de) * | 1990-03-15 | 1991-09-19 | Grundfos Int | Verfahren zur herstellung von fluidfuehrenden einrichtungen |
DE9109396U1 (de) * | 1991-07-30 | 1991-10-17 | Ksb Aktiengesellschaft, 6710 Frankenthal, De |
-
1997
- 1997-10-23 DE DE19746850A patent/DE19746850A1/de not_active Withdrawn
-
1998
- 1998-10-23 DE DE59807295T patent/DE59807295D1/de not_active Expired - Lifetime
- 1998-10-23 EP EP98120083A patent/EP0911528B1/de not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8535001B2 (en) | 2008-01-19 | 2013-09-17 | Wilo Ag | Fastening of the rotor of a centrifugal pump |
Also Published As
Publication number | Publication date |
---|---|
DE59807295D1 (de) | 2003-04-03 |
DE19746850A1 (de) | 1999-04-29 |
EP0911528A1 (de) | 1999-04-28 |
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