EP1032766B1 - Fan wheel - Google Patents

Fan wheel Download PDF

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Publication number
EP1032766B1
EP1032766B1 EP98962382A EP98962382A EP1032766B1 EP 1032766 B1 EP1032766 B1 EP 1032766B1 EP 98962382 A EP98962382 A EP 98962382A EP 98962382 A EP98962382 A EP 98962382A EP 1032766 B1 EP1032766 B1 EP 1032766B1
Authority
EP
European Patent Office
Prior art keywords
impeller
cover plate
cover plates
contact surface
cover
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98962382A
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German (de)
French (fr)
Other versions
EP1032766A1 (en
Inventor
Hermann Stahl
Erwin Wolf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hermann Stahl GmbH
Original Assignee
Hermann Stahl GmbH
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Filing date
Publication date
Application filed by Hermann Stahl GmbH filed Critical Hermann Stahl GmbH
Publication of EP1032766A1 publication Critical patent/EP1032766A1/en
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Anticipated expiration legal-status Critical
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/26Rotors specially for elastic fluids
    • F04D29/28Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/30Vanes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/02Selection of particular materials
    • F04D29/023Selection of particular materials especially adapted for elastic fluid pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/26Rotors specially for elastic fluids
    • F04D29/28Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05DINDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00Manufacture
    • F05D2230/50Building or constructing in particular ways
    • F05D2230/54Building or constructing in particular ways by sheet metal manufacturing
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49316Impeller making
    • Y10T29/4932Turbomachine making
    • Y10T29/49321Assembling individual fluid flow interacting members, e.g., blades, vanes, buckets, on rotary support member

Definitions

  • the invention relates to a fan wheel for conveying a Air mass, especially for a turbocharger, fan or Like. According to the preamble of claim 1.
  • Such a known fan wheel is known from DE-U-85 18 403 known. It consists of two roughly parallel to each other Cover plates between which the fan blades are arranged are. Troughs are formed on a cover disk, which on the other cover disc and so fan blades form. To connect the cover plates, these are in the Area of the contact surfaces glued, welded or with Foreign rivets connected.
  • the fan wheels built in this way are in front Start-up balancing, as regularly through Tolerances, material accumulations etc. imbalances occur, the high operating speeds in the turbocharger of e.g. 20,000 rpm must be equalized. The production such fan wheels is therefore expensive, labor intensive and expensive.
  • the invention has for its object a fan wheel Generic type in such a way that it in a few simple manufacturing steps made and without Balancing can be assembled ready for use.
  • an embossable material such as Example deep-drawing sheet, namely steel sheet, stainless steel sheet, Aluminum sheet or the like, allowed at the production of the cover plates also the fan blades over part or all of its axial height shape.
  • This non-cutting forming and punching makes the Material quantity not changed, so that a final Balancing can be omitted.
  • the fan wheel is off only two parts axially assembled, one axial Contact surface of a cover plate on an axial contact surface the other cover plate is tight. All the airflow exposed edges are rounded, so that at low noise, high delivery rate given is.
  • the cover plates are expedient in the area of the contact surfaces positively connected.
  • Advantageous are connection points only in the area of the contact surfaces intended.
  • the Contact surface of a cover plate made fixing holes become.
  • On the opposite contact surface of the second cover washer are for example molded by drawing or extrusion.
  • the fixation warts and fixation openings exclusively are provided in the contact surfaces of the fan blades, is also the correct rotational position of the cover plates determined to each other, so that all evenly over the Circumferentially distributed fan blades on one cover plate the assigned contact surfaces of the other cover plate issue.
  • the fixation warts are expediently Extrusion molded into rivet bolts with which the Cover plates in the area of the contact surfaces be inextricably linked. Because with this Connection technology no material is added otherwise necessary balancing measures are omitted.
  • the fan blades are expedient through the walls of one embossed bead formed, the bead at the same time to Stiffening of the cover plate contributes.
  • the beads are advantageously closed at the end and extend in radial direction over only part of the radius of the cover plate.
  • the radial ends of the beads or the fan blades have a rounded face.
  • a cover plate is particularly advantageous on the Airflow facing inside with a waffle-like or scale-like embossing. With that a better flow of the air flow conveyed by the fan wheel be achieved. Avoids the waffle-like embossing further tensions in the cover plate, causing the plane distortion-free shape is guaranteed. Even with large ones Speed, there are no imbalances.
  • the scale-like Embossing also makes a subsequent leveling of the cover plate after shaping the fan blade forming Beading can be dispensed with and beyond offer fluidic advantages and heat dissipate.
  • Fig. 1 is a fan wheel 1 for promotion in plan view an air mass shown, especially as in a turbocharger Is used.
  • the fan wheel according to the invention can also be used advantageously in other technical areas, e.g. as a fan, cooling air blower or the like.
  • the fan wheel 1 consists essentially of two congruent to each other, in the embodiment parallel cover plates 2 and 3, each a central Opening 4, 40 for attachment to e.g. have a hub.
  • the central openings 4, 40 are coaxial to the axis of rotation 5 of the base body or the fan wheel 1.
  • the cover plates 2, 3 advantageously have the same material thickness; in the Embodiment of FIGS. 1 and 7 are different Material thickness (Fig. 2) shown, with the smaller opening 40 in the z. B. thicker cover plate 3 may be provided can.
  • A protrudes through the opening 40 of the cover plate 3 Threaded portion 43 of the shaft 41 on which one Fastening nut 44 is screwed on and the fan wheel 1 on the shaft 41 is fixed against rotation.
  • FIG. 2 there is at least one fan blade 6 over a part 6a, 6b in the direction of the axis of rotation 5 measured height B in one piece with the cover plate 2 or 3 trained.
  • the height B of the fan blade 6 to one half B / 2 at the Cover plate 2 and the other half B / 2 on the cover plate 3 molded in one piece.
  • different widths of the the fan blade 6 forming parts 6a, 6b can be appropriate.
  • the fan blades 6 as embossed beads 10 axially from the material of the cover plates 2, 3 shaped, the cover plates 2, 3 from an embossable material such as a deep-drawable Sheet, steel sheet or stainless steel sheet exist.
  • an embossable material such as a deep-drawable Sheet, steel sheet or stainless steel sheet
  • the beads 10 are in their radial extent advantageous within the inside or outside diameter of the Cover disc, the ends of the beads 10 closed are.
  • the Side walls 19a, 19b on a rounded edge 21a, 21b the floor 8, 9.
  • the inner radius is R1 the bead 10 about 0.5 to 2.5 mm, preferably 0.5 mm, while the outer radius R2 exposed to the air flow Edge 21a, 21b about 0.5 to 2 mm, preferably 1 mm is.
  • the edge 22a, 22b is between the side wall and the cover plate 2, 3 with an outer Radius R2 from 0.5 to 2 mm, preferably 1 mm and with a inner radius R1 exposed to the air flow from 0.5 to 2 mm, preferably 0.5 mm.
  • the cover plate 2 and 3 Fan blades embossed beads 10 different to perform, for example with different radial Lengths, with different measured in the circumferential direction Heights or with decreasing over the radial length or increasing width.
  • the trained on the floors 8, 9 Contact surfaces 30, 31 are parallel to a parting plane 11; the axis of rotation 5 is perpendicular to the parting plane 11.
  • the height of the embossed beads 10 corresponds approximately to the height B / 2 of the blade part 6a, 6b of the fan blade 6 and is a maximum of 1 to 10 mm, preferably about 5 mm.
  • In the Extent P (FIG. 1) of a circumferential direction Bead 10 corresponds approximately to that measured in the circumferential direction Thickness d (FIG. 3) of a fan blade 6.
  • the cover plates 2, 3 are in the area of the contact surfaces 30 and 31 of the fan blades 6 are permanently attached to one another connected, whereby the two cover plates 2, 3 with the one-piece pronounced beads 10 a common insoluble Form unit.
  • a fixing lug 35 (FIG. 4) molded into a corresponding fixation recess or Fixing opening 36 engages in the other contact surface 31.
  • the Cover disks 2, 3 in the area of the contact surfaces 30, 31 connected with each other.
  • the fixing lugs are closed Rivet bolts 17 shaped.
  • the Fan blade 6 of the rivet bolt 17 is provided through a corresponding rivet opening 16 in the contact surface 31 of the other part takes hold of the inseparable connection the cover plates 2 and 3 deformed into a rivet head 18 becomes.
  • the rivet opening 16 is advantageous on the Rivet head 18 facing end with a countersink 14 Mistake. As a result, the length of the rivet bolt 17 can be shorter be carried out so that its expulsion from the material the cover plate is safely possible.
  • This riveting with Own material is with regard to balancing criteria simple manufacture advantageous.
  • the fan wheel 1 according to the invention consists of only two parts, that can be easily assembled by machine, so to achieve a high degree of automation in manufacturing is.
  • the fan wheel according to the invention is without further balancing measures can be used and has a low noise level on what is due to the rounded edges of the beads formed by extrusion is favored.
  • a waffle-like on the end face 13 or scale-like surface embossing 25 may be provided; the Embossing 25 also serves for the flatness of the cover plate, so that this despite the stamping of the beads 10 a uniform level forms the high speeds without further balancing measures from Z. B. 20,000 1 / min can be exposed.
  • the embossing has on the inside of the cover glass too aerodynamic advantages.

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

Description

Die Erfindung betrifft ein Lüfterrad zum Fördern einer Luftmasse, insbesondere für einen Turbolader, Lüfter oder dgl. nach dem Oberbegriff des Anspruchs 1.The invention relates to a fan wheel for conveying a Air mass, especially for a turbocharger, fan or Like. According to the preamble of claim 1.

Ein derartiges bekanntes Lüfterrad ist aus der DE-U-85 18 403 bekannt. Es besteht aus zwei zueinander etwa parallelen Deckscheiben, zwischen denen die Lüfterschaufeln angeordnet sind. An einer Deckscheibe sind Rinnen angeformt, welche an der anderen Deckscheibe anliegen und so Lüfterschaufeln bilden. Zur Verbindung der Deckscheiben werden diese im Bereich der Anlageflächen verklebt, verschweißt oder mit Fremdnieten verbunden. Die so gebauten Lüfterräder sind vor Inbetriebnahme auszuwuchten, da regelmäßig durch Toleranzen, Materialanhäufungen usw. Unwuchten auftreten, die bei den hohen Einsatzdrehzahlen im Turbolader von z.B. 20.000 1/min egalisiert werden müssen. Die Herstellung derartiger Lüfterräder ist daher teileaufwendig, arbeitsintensiv und teuer.Such a known fan wheel is known from DE-U-85 18 403 known. It consists of two roughly parallel to each other Cover plates between which the fan blades are arranged are. Troughs are formed on a cover disk, which on the other cover disc and so fan blades form. To connect the cover plates, these are in the Area of the contact surfaces glued, welded or with Foreign rivets connected. The fan wheels built in this way are in front Start-up balancing, as regularly through Tolerances, material accumulations etc. imbalances occur, the high operating speeds in the turbocharger of e.g. 20,000 rpm must be equalized. The production such fan wheels is therefore expensive, labor intensive and expensive.

Der Erfindung liegt die Aufgabe zugrunde, ein Lüfterrad der gattungsgemäßen Art derart auszubilden, daß es in wenigen einfachen Fertigungsschritten hergestellt und ohne Auswuchten einsatzfertig zusammengebaut werden kann.The invention has for its object a fan wheel Generic type in such a way that it in a few simple manufacturing steps made and without Balancing can be assembled ready for use.

Die Aufgabe wird erfindungsgemäß nach den kennzeichnenden Merkmalen des Anspruchs 1 gelöst. The task is inventively according to the characteristic Features of claim 1 solved.

Die Anwendung von einem prägefähigem Material, wie zum Beispiel tiefziehfähigem Blech, nämlich Stahlblech, Edelstahlblech, Aluminiumblech oder dergleichen, erlaubt bei der Herstellung der Deckscheiben zugleich die Lüfterflügel über einen Teil oder über ihre gesamte axiale Höhe zu prägen. Durch dieses spanlose Umformen und Stanzen wird die Materialmenge nicht verändert, so daß ein abschließendes Auswuchten entfallen kann. Aufgrund der einteiligen Ausbildung der Lüfterschaufel mit der Deckscheibe sind nur wenige Befestigungspunkte notwendig. Das Lüfterrad ist aus nur zwei Teilen axial zusammengesetzt, wobei eine axiale Anlagefläche der einen Deckscheibe an einer axialen Anlagefläche der anderen Deckscheibe fest anliegt. Alle dem Luftstrom ausgesetzten Kanten sind gerundet, so daß bei geringer Geräuschentwicklung eine hohe Förderleistung gegeben ist.The use of an embossable material, such as Example deep-drawing sheet, namely steel sheet, stainless steel sheet, Aluminum sheet or the like, allowed at the production of the cover plates also the fan blades over part or all of its axial height shape. This non-cutting forming and punching makes the Material quantity not changed, so that a final Balancing can be omitted. Because of the one-piece training the fan blade with the cover plate are only a few Attachment points necessary. The fan wheel is off only two parts axially assembled, one axial Contact surface of a cover plate on an axial contact surface the other cover plate is tight. All the airflow exposed edges are rounded, so that at low noise, high delivery rate given is.

Zweckmäßig sind die Deckscheiben im Bereich der Anlageflächen formschlüssig miteinander verbunden. Vorteilhaft sind nur im Bereich der Anlageflächen Verbindungsstellen vorgesehen.The cover plates are expedient in the area of the contact surfaces positively connected. Advantageous are connection points only in the area of the contact surfaces intended.

In vorteilhafter Ausgestaltung der Erfindung können an der Anlagefläche der einen Deckscheibe Fixieröffnungen angefertigt werden. An der gegenüberliegenden Anlagefläche der zweiten Deckscheibe werden Fixierwarzen beispielsweise durch Ziehen oder Fließpressen angeformt. Bei der Ausrichtung der Deckscheiben zueinander greifen die Fixierwarzen in die gegenüberliegende Fixieröffnung, die vorteilhaft auf der Nietkopfseite eine Ansenkung haben, wodurch eine lagerichtige Zuordnung der Teile gewährleistet ist. Da die Fixierwarzen und Fixieröffnungen ausschließlich in den Anlageflächen der Lüfterschaufeln vorgesehen sind, ist zugleich die richtige Drehlage der Deckscheiben zueinander bestimmt, so daß alle gleichmäßig über den Umfang verteilten Lüfterschaufeln der einen Deckscheibe an den zugeordneten Anlageflächen der anderen Deckscheibe anliegen. Zweckmäßig werden die Fixierwarzen durch Fließpressen zu Nietbolzen ausgeformt, mit denen die Deckscheiben im Bereich der Anlageflächen unlösbar miteinander verbunden werden. Da bei dieser Verbindungstechnik kein Material hinzugefügt wird, entfallen sonst notwendige Auswuchtmaßnahmen.In an advantageous embodiment of the invention, the Contact surface of a cover plate made fixing holes become. On the opposite contact surface of the second cover washer are for example molded by drawing or extrusion. In the Alignment of the cover plates to each other Fixing warts in the opposite fixing opening, the advantageously have a countersink on the rivet head side, which ensures that the parts are correctly positioned is. Because the fixation warts and fixation openings exclusively are provided in the contact surfaces of the fan blades, is also the correct rotational position of the cover plates determined to each other, so that all evenly over the Circumferentially distributed fan blades on one cover plate the assigned contact surfaces of the other cover plate issue. The fixation warts are expediently Extrusion molded into rivet bolts with which the Cover plates in the area of the contact surfaces be inextricably linked. Because with this Connection technology no material is added otherwise necessary balancing measures are omitted.

Zweckmäßig sind die Lüfterschaufeln durch die Wände einer geprägten Sicke gebildet, wobei die Sicke zugleich zur Versteifung der Deckscheibe beiträgt. Die Sicken sind vorteilhaft endseitig geschlossen und erstrecken sich in radialer Richtung über nur einen Teil des Radius der Deckscheibe. Die radialen Enden der Sicken bzw. der Lüfterschaufeln haben eine gerundete Stirnseite.The fan blades are expedient through the walls of one embossed bead formed, the bead at the same time to Stiffening of the cover plate contributes. The beads are advantageously closed at the end and extend in radial direction over only part of the radius of the cover plate. The radial ends of the beads or the fan blades have a rounded face.

Vorteilhaft ist eine Deckscheibe insbesondere auf der dem Luftstrom zugewandten Innenseite mit einer waffelartigen oder schuppenartigen Prägung versehen. Damit kann eine bessere Strömung des von dem Lüfterrad geförderten Luftstromes erzielt werden. Die waffelartige Prägung vermeidet ferner Spannungen in der Deckscheibe, wodurch deren plane verzugsfreie Form gewährleistet wird. Auch bei großer Drehzahl treten keine Unwuchten auf. Die schuppenartige Prägung macht auch eine nachträgliche Planierung der Deckscheibe nach Ausprägen der die Lüfterschaufel bildenden Sicken entbehrlich und kann darüber hinaus strömungstechnische Vorteile bieten und auftretende Wärme abführen. A cover plate is particularly advantageous on the Airflow facing inside with a waffle-like or scale-like embossing. With that a better flow of the air flow conveyed by the fan wheel be achieved. Avoids the waffle-like embossing further tensions in the cover plate, causing the plane distortion-free shape is guaranteed. Even with large ones Speed, there are no imbalances. The scale-like Embossing also makes a subsequent leveling of the cover plate after shaping the fan blade forming Beading can be dispensed with and beyond offer fluidic advantages and heat dissipate.

Weitere Merkmale der Erfindung ergeben sich aus den weiteren Ansprüchen, der Beschreibung und der Zeichnung, in der nachfolgend im einzelnen beschriebene Ausführungsbeispiele der Erfindung dargestellt sind. Es zeigen:

Fig. 1
eine Draufsicht auf ein erfindungsgemäßes Lüfterrad,
Fig. 2
einen Schnitt längs der Linie II-II in Fig. 1,
Fig. 3
eine Draufsicht auf eine Deckscheibe des Lüfterrades mit ausgeprägten Teilen der Lüfterschaufeln,
Fig. 4
in vergrößerter Darstellung die Einzelheit Z aus Fig. 2 mit Fixierwarzen zur Lageausrichtung,
Fig. 5
in vergrößerter Darstellung die Einzelheit 7 aus Fig. 2 mit zu Nietbolzen ausgeführten Fixierwarzen und einer Nietlochansenkung auf der Nietkopfseite,
Fig. 6
eine vergrößerte Darstellung der Einzelheit Z aus Fig. 2 mit durch Durchsetzfügen formschlüssig verbundenen Deckscheiben,
Fig. 7
eine vergrößerte Darstellung der Einzelheit Z in Fig. 2 mit durch Eigenmaterial vernieteten Deckscheiben unterschiedlicher Stärken.
Further features of the invention result from the further claims, the description and the drawing, in which exemplary embodiments of the invention described in detail below are shown. Show it:
Fig. 1
a plan view of an inventive fan wheel,
Fig. 2
2 shows a section along the line II-II in FIG. 1,
Fig. 3
a plan view of a cover plate of the fan wheel with pronounced parts of the fan blades,
Fig. 4
in an enlarged view, the detail Z from FIG. 2 with fixing lugs for positional alignment,
Fig. 5
2 shows an enlarged view of detail 7 from FIG.
Fig. 6
3 shows an enlarged illustration of the detail Z from FIG. 2 with cover disks which are connected in a form-fitting manner by pushing through,
Fig. 7
an enlarged view of the detail Z in Fig. 2 with cover plates riveted by own material of different thicknesses.

In Fig. 1 ist in Draufsicht ein Lüfterrad 1 zur Förderung einer Luftmasse gezeigt, wie es insbesondere in einem Turbolader Verwendung findet. Das erfindungsgemäße Lüfterrad ist auch in anderen technischen Gebieten vorteilhaft einsetzbar, z.B. als Ventilator, Kühlluftgebläse o. dgl.. In Fig. 1 is a fan wheel 1 for promotion in plan view an air mass shown, especially as in a turbocharger Is used. The fan wheel according to the invention can also be used advantageously in other technical areas, e.g. as a fan, cooling air blower or the like.

Das Lüfterrad 1 besteht im wesentlichen aus zwei deckungsgleich zueinander liegenden, im Ausführungsbeispiel parallelen Deckscheiben 2 und 3, die jeweils eine zentrale Öffnung 4, 40 zur Befestigung auf z.B. einer Nabe aufweisen. Die zentralen Öffnungen 4, 40 liegen koaxial zur Drehachse 5 des Grundkörpers bzw. des Lüfterrades 1. Die Deckscheiben 2, 3 haben vorteilhaft gleiche Materialstärke; im Ausführungsbeispiel nach Fig. 1 und 7 sind unterschiedliche Materialstärke (Fig. 2) gezeigt, wobei die kleinere Öffnung 40 in der z. B. dickeren Deckscheibe 3 vorgesehen sein kann. Zur Befestigung auf dem Ende einer Welle 41 greift , diese durch die größere Öffnung 4 in das Lüfterrad 1 ein und liegt mit einer Ringschulter 42 an der Deckscheibe 3 an. Durch die Öffnung 40 der Deckscheibe 3 ragt ein Gewindeabschnitt 43 der Welle 41, auf dem eine Befestigungsmutter 44 aufgeschraubt ist und das Lüfterrad 1 auf der Welle 41 drehfest festliegt.The fan wheel 1 consists essentially of two congruent to each other, in the embodiment parallel cover plates 2 and 3, each a central Opening 4, 40 for attachment to e.g. have a hub. The central openings 4, 40 are coaxial to the axis of rotation 5 of the base body or the fan wheel 1. The cover plates 2, 3 advantageously have the same material thickness; in the Embodiment of FIGS. 1 and 7 are different Material thickness (Fig. 2) shown, with the smaller opening 40 in the z. B. thicker cover plate 3 may be provided can. To attach to the end of a shaft 41, this through the larger opening 4 into the fan wheel 1 and lies with an annular shoulder 42 on the cover disk 3 on. A protrudes through the opening 40 of the cover plate 3 Threaded portion 43 of the shaft 41 on which one Fastening nut 44 is screwed on and the fan wheel 1 on the shaft 41 is fixed against rotation.

Wie Fig. 2 weiter zeigt, sind zwischen den einander zugewandten Stirnseiten 12 und 13 der Deckscheiben 2 und 3 Lüfterschaufeln 6 vorgesehen, welche leicht in Laufrichtung 7 gewölbt ausgeführt sind (Fig. 1). Die Anordnung ist so getroffen, daß bei in Laufrichtung 7 drehendem Lüfterrad 1 über die zentrale Öffnung 4 der einen Deckscheibe 2 Luft angesaugt wird und radial nach außen strömt. Es handelt sich somit um ein Lüfterrad mit axialer Zuströmung und radialer Abströmung.As further shown in Fig. 2, are between the facing each other End faces 12 and 13 of cover plates 2 and 3 fan blades 6 is provided, which is slightly in the running direction 7 are arched (Fig. 1). The order is made that with fan wheel 1 rotating in the direction of rotation 7 Air through the central opening 4 of a cover plate 2 is sucked in and flows radially outwards. It deals is therefore a fan wheel with axial inflow and radial Outflow.

Wie aus Fig. 2 zu ersehen, ist eine Lüfterschaufel 6 zumindest über einen Teil 6a, 6b ihrer in Richtung der Drehachse 5 gemessenen Höhe B einteilig mit der Deckscheibe 2 bzw. 3 ausgebildet. Im Ausführungsbeispiel nach Fig. 2 ist die Höhe B der Lüfterschaufel 6 zur einen Hälfte B/2 an der Deckscheibe 2 und zur anderen Hälfte B/2 an der Deckscheibe 3 einteilig angeformt. Auch unterschiedliche Breiten der die Lüfterschaufel 6 bildenden Teile 6a, 6b können zweckmäßig sein.As can be seen from FIG. 2, there is at least one fan blade 6 over a part 6a, 6b in the direction of the axis of rotation 5 measured height B in one piece with the cover plate 2 or 3 trained. In the exemplary embodiment according to FIG. 2 the height B of the fan blade 6 to one half B / 2 at the Cover plate 2 and the other half B / 2 on the cover plate 3 molded in one piece. Also different widths of the the fan blade 6 forming parts 6a, 6b can be appropriate.

Im gezeigten Ausführungsbeispiel sind die Lüfterschaufeln 6 als geprägte Sicken 10 axial aus dem Material der Deckscheiben 2, 3 geformt, wobei die Deckscheiben 2, 3 aus einem prägefähigen Material wie z.B. einem tiefziehfähigen Blech, Stahlblech oder Edelstahlblech bestehen. Auch sind Gestaltungen aus Aluminiumblechen bzw. Aluminiumlegierungen einfach ausführbar; in Abhängigkeit vom Einsatzfall kann das Material der Deckscheiben 2, 3 auch ein Kunststoff, gegebenenfalls ein kohlefaserverstärkter Kunststoff sein. Die Sicken 10 liegen in ihrer radialen Erstreckung vorteilhaft innerhalb des Innen- bzw. Außendurchmessers der Deckscheibe, wobei die Enden der Sicken 10 geschlossen sind.In the exemplary embodiment shown, the fan blades 6 as embossed beads 10 axially from the material of the cover plates 2, 3 shaped, the cover plates 2, 3 from an embossable material such as a deep-drawable Sheet, steel sheet or stainless steel sheet exist. Also are Designs from aluminum sheets or aluminum alloys easy to do; depending on the application the material of the cover plates 2, 3 is also a plastic, optionally be a carbon fiber reinforced plastic. The beads 10 are in their radial extent advantageous within the inside or outside diameter of the Cover disc, the ends of the beads 10 closed are.

Für einen einfachen Zusammenbau ist es zweckmäßig, die Deckscheiben 2 und 3 zur Trennebene 11 in etwa spiegelsymmetrisch gleich auszubilden. Wie Fig. 2 zeigt, bestehen die aus der Deckscheibe 2 einteilig geprägten Sicken 10 aus einem flachen, als Anlagefläche 30 dienenden Boden 8, 9 der über Seitenwände 19a, 19b mit der Deckscheibe 2, 3 verbunden ist. Somit können beim Zusammenfügen des Lüfterrades 1 die Deckscheiben 2 und 3 leicht axial zusammengefügt werden, wobei der Boden 8 einer Lüfterschaufel der einen Deckscheibe 2 an einem Boden 9 einer spiegelsymmetrischen ausgeprägten Lüfterschaufel der anderen Deckscheibe 3 anliegt. Die Böden 8, 9 sind mit einer Breite von 1 bis 10 mm vorzugsweise 2 bis 5 mm ausgebildet. For easy assembly, it is convenient to Cover plates 2 and 3 to the parting plane 11 approximately mirror symmetrical train right away. 2 shows exist the beads 10 embossed in one piece from the cover plate 2 a flat base 8, 9 serving as contact surface 30 via side walls 19a, 19b with the cover disk 2, 3 connected is. Thus, when the Fan wheel 1, the cover plates 2 and 3 slightly axially be joined together, the bottom 8 of a fan blade the one cover plate 2 on a bottom 9 one mirror-symmetrical pronounced fan blade of the other cover plate 3 is present. The floors 8, 9 are with a width of 1 to 10 mm, preferably 2 to 5 mm educated.

Wie die Fig. 4 und 5 zeigen sind die geprägten Sicken 10 der Luftschaufeln so ausgebildet, daß keine den Luftstrom störenden Kanten auftreten. Entsprechend schließen die Seitenwände 19a, 19b über eine gerundete Kante 21a, 21b an den Boden 8, 9 an. Vorzugsweise ist der innere Radius R1 der Sicke 10 etwa 0,5 bis 2,5 mm, vorzugsweise 0,5 mm, während der äußere, dem Luftstrom ausgesetzte Radius R2 der Kante 21a, 21b etwa 0,5 bis 2 mm, vorzugsweise 1 mm beträgt. In gleicher Weise ist die Kante 22a, 22b zwischen der Seitenwand und der Deckscheibe 2, 3 mit einem äußeren Radius R2 von 0,5 bis 2 mm, vorzugsweise 1 mm und mit einem inneren, dem Luftstrom ausgesetzten Radius R1 von 0,5 bis 2 mm, vorzugsweise 0,5 mm ausgebildet. Dabei kann es vorteilhaft sein, die Kante 21a, 21b stärker zu runden als die Kante 22a, 22b. Die aus der Deckscheibe 2 geprägten Seitenwände 19a der Lüfterschaufeln 6 haben über ihre gesamte radiale Erstreckung vorteilhaft die gleiche axiale Höhe B/2, wobei jede Seitenwand etwa mit einem rechten Winkel 32 zur Ebene der Deckscheibe 2, 3 liegt bzw. etwa rechtwinklig zu einer Ebene, zu der die Drehachse 5 senkrecht liegt. Die Fig. 2 und 3 zeigen, daß die radial äußeren Enden der Lüfterschaufeln 6 aus den nebeneinanderliegenden Stirnseiten 20a, 20b der Sicken 10 der Deckenscheiben 2 und 3 besteht. Jede Stirnseite 20a, 20b ist mit einem Radius von 1 bis 4 mm, vorzugsweise 1,5 mm gerundet.4 and 5 show the embossed beads 10th of the air blades so that none of the air flow disruptive edges occur. Accordingly, the Side walls 19a, 19b on a rounded edge 21a, 21b the floor 8, 9. Preferably the inner radius is R1 the bead 10 about 0.5 to 2.5 mm, preferably 0.5 mm, while the outer radius R2 exposed to the air flow Edge 21a, 21b about 0.5 to 2 mm, preferably 1 mm is. In the same way, the edge 22a, 22b is between the side wall and the cover plate 2, 3 with an outer Radius R2 from 0.5 to 2 mm, preferably 1 mm and with a inner radius R1 exposed to the air flow from 0.5 to 2 mm, preferably 0.5 mm. It can be advantageous to round the edge 21a, 21b more than the edge 22a, 22b. The embossed from the cover plate 2 Side walls 19a of the fan blades 6 have their entire radial extent advantageously the same axial Height B / 2, with each side wall approximately with a right one Angle 32 to the level of the cover plate 2, 3 lies or approximately perpendicular to a plane to which the axis of rotation 5 is vertical. 2 and 3 show that the radial outer ends of the fan blades 6 from the adjacent end faces 20a, 20b of the beads 10 the ceiling panes 2 and 3. Each end face 20a, 20b is preferably with a radius of 1 to 4 mm 1.5 mm rounded.

Es kann zweckmäßig sein, die aus der Deckscheibe 2 und 3 zu Lüfterschaufeln geprägten Sicken 10 unterschiedlich auszuführen, so zum Beispiel mit unterschiedlichen radialen Längen, mit unterschiedlichen in Umfangsrichtung gemessenen Höhen oder mit über die radial Länge abnehmender bzw. zunehmender Breite. Die an den Böden 8, 9 ausgebildeten Anlageflächen 30, 31 liegen parallel zu einer Trennebene 11; die Drehachse 5 steht senkrecht auf der Trennebene 11. Die Höhe der geprägten Sicken 10 entspricht etwa der Höhe B/2 des Schaufelteils 6a, 6b der Lüfterschaufel 6 und beträgt maximal 1 bis 10 mm, vorzugsweise etwa 5 mm. Die in Umfangsrichtung gemessene Erstreckung P (Fig. 1) einer Sicke 10 entspricht etwa der in Umfangsrichtung gemessenen Dicke d (Fig. 3) einer Lüfterschaufel 6.It may be appropriate to use the cover plate 2 and 3 Fan blades embossed beads 10 different to perform, for example with different radial Lengths, with different measured in the circumferential direction Heights or with decreasing over the radial length or increasing width. The trained on the floors 8, 9 Contact surfaces 30, 31 are parallel to a parting plane 11; the axis of rotation 5 is perpendicular to the parting plane 11. The height of the embossed beads 10 corresponds approximately to the height B / 2 of the blade part 6a, 6b of the fan blade 6 and is a maximum of 1 to 10 mm, preferably about 5 mm. In the Extent P (FIG. 1) of a circumferential direction Bead 10 corresponds approximately to that measured in the circumferential direction Thickness d (FIG. 3) of a fan blade 6.

Die Deckscheiben 2, 3 sind im Bereich der Anlageflächen 30 und 31 der Lüfterschaufeln 6 unlösbar fest miteinander verbunden, wodurch die beiden Deckscheiben 2, 3 mit den einteilig ausgeprägten Sicken 10 eine gemeinsame unlösbare Baueinheit bilden. Um eine lagerichtige Ausrichtung der Deckscheiben 2 und 3 zueinander zu gewährleisten, ist an einer Anlagefläche 30 eine Fixierwarze 35 (Fig. 4) angeformt, die in eine entsprechende Fixiervertiefung bzw. Fixieröffnung 36 in der anderen Anlagefläche 31 eingreift. In dieser deckungsgleich ausgerichteten Lage werden die Deckscheiben 2, 3 im Bereich der Anlageflächen 30, 31 miteinander verbunden.The cover plates 2, 3 are in the area of the contact surfaces 30 and 31 of the fan blades 6 are permanently attached to one another connected, whereby the two cover plates 2, 3 with the one-piece pronounced beads 10 a common insoluble Form unit. To ensure that the To ensure cover plates 2 and 3 to each other is on a contact surface 30 a fixing lug 35 (FIG. 4) molded into a corresponding fixation recess or Fixing opening 36 engages in the other contact surface 31. In this congruently aligned situation, the Cover disks 2, 3 in the area of the contact surfaces 30, 31 connected with each other.

Im Ausführungsbeispiel nach Fig. 5 sind die Fixierwarzen zu Nietbolzen 17 ausgeformt. An der einen Anlagefläche 30 der Lüfterschaufel 6 ist der Nietbolzen 17 vorgesehen, der durch eine entsprechende Nietöffnung 16 in der Anlagefläche 31 des anderen Teils greift und zur unlösbaren Verbindung der Deckscheiben 2 und 3 zu einem Nietkopf 18 verformt wird. Vorteilhaft ist die Nietöffnung 16 auf dem dem Nietkopf 18 zugewandten Ende mit einer Ansenkung 14 versehen. Dadurch kann die Länge des Nietbolzens 17 kürzer ausgeführt sein, so daß dessen Austreiben aus dem Material der Deckscheibe sicher möglich ist. Dieses Vernieten mit Eigenmaterial ist im Hinblick auf Auswuchtkriterien bei einfacher Herstellung vorteilhaft. 5, the fixing lugs are closed Rivet bolts 17 shaped. On one contact surface 30 the Fan blade 6 of the rivet bolt 17 is provided through a corresponding rivet opening 16 in the contact surface 31 of the other part takes hold of the inseparable connection the cover plates 2 and 3 deformed into a rivet head 18 becomes. The rivet opening 16 is advantageous on the Rivet head 18 facing end with a countersink 14 Mistake. As a result, the length of the rivet bolt 17 can be shorter be carried out so that its expulsion from the material the cover plate is safely possible. This riveting with Own material is with regard to balancing criteria simple manufacture advantageous.

Wie Fig. 6 zeigt, können die Deckscheiben 2, 3 im Bereich der Anlageflächen 30, 31 der Lüfterschaufel 6 auch mittels Durchsetzfügen oder Druckfügen unlösbar miteinander verbunden werden, was auch als Toxen bezeichnet ist. Bei diesem Vorgang wird das Material der Deckscheibe 3 in dem Fügebereich 15 in das Material der Deckscheibe 2 eingetrieben und verformt.6 shows, the cover plates 2, 3 in the area the contact surfaces 30, 31 of the fan blade 6 also by means of Enforcing or pressure joining inextricably linked what is also known as toxins. With this Process is the material of the cover plate 3 in the joining area 15 driven into the material of the cover plate 2 and deformed.

Zweckmäßig sind über die Länge einer Lüfterschaufel 6 je zwei Befestigungen, im Ausführungsbeispiel der Figuren 5 und 6 je zwei Toxnieten bzw. Nietbolzen 17 vorgesehen, die vorteilhaft jeweils mit gleichem Abstand zum Ende einer Lüfterschaufel 6 bzw. den sie tragenden Boden 9 eines die Lüfterschaufel bildenden Teils 6a, 6b liegen. Bei über den Umfang der Deckscheiben 2, 3 gleichmäßig verteilt angeordneten z. B. sechs Lüfterschaufeln sind daher zwölf formschlüssige Nietverbindungen 50 geschaffen, wie in Fig. 3 angedeutet.Are appropriate over the length of a fan blade 6 each two fastenings, in the exemplary embodiment of FIGS. 5 and 6 two tox rivets or rivet bolts 17 are provided, respectively advantageous each with the same distance to the end of one Fan blade 6 or the base 9 carrying it a Fan blade forming part 6a, 6b lie. At over the The circumference of the cover plates 2, 3 evenly distributed arranged z. B. six fan blades are therefore twelve positive rivet connections 50 created, as in Fig. 3 indicated.

Im Ausführungsbeispiel nach Fig. 7 besteht die Lüfterschaufel 6 aus einer einzigen, aus der Deckscheibe 2 geprägten Sicke 10. Diese Sicke weist die Anlagefläche 30 auf, welche an einer korrespondierenden Anlagefläche 31 an der Deckscheibe 3 zur Anlage gelangt. Wie in Fig. 7 dargestellt, durchgreift ein auf der Anlagefläche 30 ausgebildeter Nietbolzen 17 eine Nietöffnung 16 in der Deckscheibe 3, wodurch ein Formschluß zwischen den Deckscheiben 2 und 3 erzielt ist. Im Ausführungsbeispiel nach Fig. 7 ist die Lüfterschaufel 6 aus der mit der größeren Materialstärke ausgebildeten Deckscheibe 3 ausgeformt. Auf diese Weise kann sichergestellt werden, daß das zum Ausprägen notwendige Material zur Bildung der Lüfterschaufel 6 zur Verfügung steht. 7 there is the fan blade 6 from a single, stamped from the cover plate 2 Bead 10. This bead has the contact surface 30, which on a corresponding contact surface 31 on the cover plate 3 comes to the plant. As shown in Fig. 7, passes through a trained on the contact surface 30 Rivet bolt 17 a rivet opening 16 in the cover plate 3, whereby a positive connection between the cover plates 2 and 3 is achieved. 7 is the Fan blade 6 from the one with the greater material thickness trained cover plate 3 molded. In this way it can be ensured that what is necessary for stamping Material for forming the fan blade 6 for Available.

Das erfindungsgemäße Lüfterrad 1 besteht aus nur zwei Teilen, die leicht maschinell zusammengefügt werden können, so daß ein hoher Automatisierungsgrad bei der Fertigung zu erzielen ist.The fan wheel 1 according to the invention consists of only two parts, that can be easily assembled by machine, so to achieve a high degree of automation in manufacturing is.

Das erfindungsgemäße Lüfterrad ist ohne weitere Auswuchtmaßnahmen einsetzbar und weist eine nur geringe Geräuschentwicklung auf, was durch die abgerundeten Kanten der durch Fließpressen gebildeten Sicken begünstigt ist. Zur Steigerung der Förderleistung bei geringer Geräuschentwicklung kann es vorteilhaft sein, zumindest die inneren Stirnseiten 12, 13 der Deckscheiben 2, 3 aufzurauhen. Wie Fig. 3 zeigt, kann auf der Stirnseite 13 eine waffelartige oder schuppenartige Flächenprägung 25 vorgesehen sein; die Prägung 25 dient auch der Planheit der Deckscheibe, so daß diese trotz Anprägen der Sicken 10 eine gleichmäßige Ebene bildet, die ohne weitere Auswuchtmaßnahmen hohen Drehzahlen von z. B. 20.000 1/min ausgesetzt werden kann. Die Prägung auf der Innenseite der Deckscheibe hat auch strömungstechnische Vorteile. Zur weiteren Geräuschsenkung kann es vorteilhaft sein, den äußeren radialen Rand der Deckscheiben 2, 3 mit einer Verzahnung 26 zu versehen, wie dies in Fig. 2 angedeutet ist.The fan wheel according to the invention is without further balancing measures can be used and has a low noise level on what is due to the rounded edges of the beads formed by extrusion is favored. to Increase in delivery rate with low noise it can be beneficial, at least the inner ones Roughen end faces 12, 13 of cover disks 2, 3. How Fig. 3 shows, a waffle-like on the end face 13 or scale-like surface embossing 25 may be provided; the Embossing 25 also serves for the flatness of the cover plate, so that this despite the stamping of the beads 10 a uniform level forms the high speeds without further balancing measures from Z. B. 20,000 1 / min can be exposed. The embossing has on the inside of the cover glass too aerodynamic advantages. For further noise reduction it may be advantageous to use the outer radial edge of the Cover plates 2, 3 to be provided with a toothing 26, such as this is indicated in Fig. 2.

Claims (12)

  1. Impeller for conveying an air mass, in particular a turbocharger, a fan or similar, consisting of a basic body with a central axis of rotation (5), the basic body consisting of two substantially congruent cover plates (2, 3) lying one opposite the other, between the oppositely facing end faces (12, 13) of which impeller blades (6) are arranged, punched axially out of the material of a cover plate (2, 3) and having an axial contact surface (30) against which an oppositely lying axial contact surface (31) of the other cover plate (2, 3) lies, and having fixing means provided in the region of joint surfaces (8, 9) for non-detachably joining the cover plates (2, 3) to one another,
    characterised in that the edge (22a, 22b) between the plane of the cover plate (2,3) and the side wall (19a, 19b) of an impeller blade (6) standing substantially perpendicular to the plane of the cover plate (2,3) and the edge (21a, 21b) between the side wall (19a, 19b) and the contact surface (30, 31) is rounded, having a radius (R1, R2) of approximately 0.5 to 2 mm and in that the cover plates (2, 3) are joined to one another in a positive fit by their material in the region of the contact surfaces (30, 31).
  2. Impeller as claimed in claim 1,
    characterised in that the cover plates (2, 3) are made from a deep drawn sheet metal, in particular steel sheet or aluminium sheet.
  3. Impeller as claimed in claim 1 or 2,
    characterised in that the cover plates (2, 3) are aligned with one another by means of fixing projections (35) formed in the material of the cover plates (2, 3) in the region of the contact surfaces (30, 31).
  4. Impeller as claimed in claim 3,
    characterised in that the fixing projections are provided in the form of rivet studs (17) which locate and are rivetted in matching rivet orifices (16) in the oppositely lying contact surface (31).
  5. Impeller as claimed in claim 1 or 2,
    characterised in that the cover plates (2, 3) are joined to one another by compression joints or forced joints.
  6. Impeller as claimed in one of claims 1 to 5,
    characterised in that an impeller blade (6) is formed from a crease (10) punched out from the plane of the cover plate (2, 3), a height (B/2) of which is preferably 1 to 10 mm, in particular 5 mm.
  7. Impeller as claimed in claim 6,
    characterised in that a floor (8, 9) of the crease (10) forms the contact surface (30, 31) and has a width of approximately 1 to 10 mm, preferably approximately 5 mm.
  8. Impeller as claimed in one of claims 1 to 7,
    characterised in that the side walls (19a, 19b) of the punched crease (10) lying substantially perpendicular to the plane of the cover plate (2, 3) adjoin the floor (8, 9) with an external radius (R2) of approximately 0.5 to 1 mm and the plane of the cover plate (2, 3) with an internal radius (R1) of approximately 0.5 to 1 mm.
  9. Impeller as claimed in one of claims 1 to 8,
    characterised in that the end face (20a, 20b) lying at the end of the crease (10) is rounded, having a radius of approximately 1 to 4 mm.
  10. Impeller as claimed in one of claims 1 to 9,
    characterised in that the cover plate (2, 3) has scalelike or waffle-pattern embossing (25), which is preferably disposed on the internal side face (12, 13) of the cover plate (2, 3).
  11. Impeller as claimed in one of claims 1 to 10,
    characterised in that the contact surface (30, 31) extends across the entire radial length of the impeller blade (6).
  12. Impeller as claimed in one of claims 1 to 11,
    characterised in that a part (6a) of the impeller blade (6) is integral with the one cover plate (2) and another part (6b) of the impeller blade (6) is integral with the other cover plate (3), the cover plates (2,3) preferably being of the same design, symmetrical in mirror image, and in particular being of the same material thickness.
EP98962382A 1997-11-21 1998-11-21 Fan wheel Expired - Lifetime EP1032766B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19751729A DE19751729C2 (en) 1997-11-21 1997-11-21 fan
DE19751729 1997-11-21
PCT/EP1998/007507 WO1999027258A1 (en) 1997-11-21 1998-11-21 Fan wheel

Publications (2)

Publication Number Publication Date
EP1032766A1 EP1032766A1 (en) 2000-09-06
EP1032766B1 true EP1032766B1 (en) 2002-03-27

Family

ID=7849484

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98962382A Expired - Lifetime EP1032766B1 (en) 1997-11-21 1998-11-21 Fan wheel

Country Status (4)

Country Link
US (1) US6386831B1 (en)
EP (1) EP1032766B1 (en)
DE (2) DE19751729C2 (en)
WO (1) WO1999027258A1 (en)

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DE102010009566A1 (en) 2010-02-26 2011-09-01 Ebm-Papst Mulfingen Gmbh & Co. Kg Radial or diagonal fan wheel
DE202009018770U1 (en) 2009-02-12 2013-03-07 Ebm-Papst Mulfingen Gmbh & Co. Kg Radial or diagonal fan wheel

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2218917A1 (en) 2009-02-12 2010-08-18 ebm-papst Mulfingen GmbH & Co. KG Radial or diagonal ventilator wheel
DE202009018770U1 (en) 2009-02-12 2013-03-07 Ebm-Papst Mulfingen Gmbh & Co. Kg Radial or diagonal fan wheel
US8454317B2 (en) 2009-02-12 2013-06-04 Ebm-Papst Mulfingen Gmbh & Co. Kg Radial or diagonal fan wheel
DE102010009566A1 (en) 2010-02-26 2011-09-01 Ebm-Papst Mulfingen Gmbh & Co. Kg Radial or diagonal fan wheel
EP2363609A1 (en) 2010-02-26 2011-09-07 ebm-papst Mulfingen GmbH & Co. KG Radial or diagonal ventilator wheel
DE102010009566A9 (en) 2010-02-26 2012-03-01 Ebm-Papst Mulfingen Gmbh & Co. Kg Radial or diagonal fan wheel
US8932019B2 (en) 2010-02-26 2015-01-13 Emb-Papst Mulfingen Gmbh & Co. Kg Radial or diagonal fan wheel
DE202010018509U1 (en) 2010-02-26 2017-03-15 Ebm-Papst Mulfingen Gmbh & Co. Kg Radial or diagonal fan wheel

Also Published As

Publication number Publication date
DE19751729A1 (en) 1999-06-02
WO1999027258A1 (en) 1999-06-03
DE59803561D1 (en) 2002-05-02
US6386831B1 (en) 2002-05-14
EP1032766A1 (en) 2000-09-06
DE19751729C2 (en) 2002-11-28

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