EP1934483B1 - Ventilator wheel - Google Patents

Ventilator wheel Download PDF

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Publication number
EP1934483B1
EP1934483B1 EP07788146A EP07788146A EP1934483B1 EP 1934483 B1 EP1934483 B1 EP 1934483B1 EP 07788146 A EP07788146 A EP 07788146A EP 07788146 A EP07788146 A EP 07788146A EP 1934483 B1 EP1934483 B1 EP 1934483B1
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EP
European Patent Office
Prior art keywords
blades
hub
ventilator
mounting flanges
fan
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Active
Application number
EP07788146A
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German (de)
French (fr)
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EP1934483A1 (en
Inventor
Dieter Best
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Ebm Papst Mulfingen GmbH and Co KG
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Ebm Papst Mulfingen GmbH and Co KG
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Publication of EP1934483A1 publication Critical patent/EP1934483A1/en
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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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
    • F04D29/329—Details of the hub
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/34—Blade mountings

Definitions

  • the present invention relates to a fan wheel consisting of a hub, on the periphery of mounting flanges for releasably securing fan blades are arranged.
  • Such a fan is, for example, from the DE 39 41 691 C2 known.
  • the mounting flanges are cast directly on the hub, which also forms the rotor of a drive motor designed as an external rotor motor.
  • the blades of the fan wheel are screwed to these mounting flanges. This requires the preparation of expensive casting tools when fan wheels are to be manufactured with differing number of blades or position of the blades.
  • a welded wing hub which consists of a polygonal wreathless hub disc, are welded to the perpendicular to their side surfaces circular plates, to be mounted in the same number as wings.
  • This welded wing hub is to serve for the production of the axial fan or an axial fan.
  • a fan wheel which has a hollow cylindrical hub, on the periphery of mounting flanges for releasably securing fan blades are arranged.
  • Each fan blade is clamped between a mounting flange formed as an injection molded part and an additional connecting flange formed as an injection molded part, wherein the two flanges are fastened to one another by means of a screw connection.
  • the present invention is based on the object, starting from the known fan wheel to improve this so that a production with any number of blades and position without expensive special tools is possible, so that a large manufacturing variation width is achieved at low production costs.
  • a fan wheel in which the hollow cylindrical hub is made of steel and the mounting flanges are made of steel and are connected to the hub by welding, and the mounting flanges are made of sheet steel as a molded or bent parts.
  • the invention is based on the recognition that, in contrast to large-area metal blades, the mounting flanges can weld easily. Because these have a relatively small mass and are compact. In contrast, when welding the fan blades as a whole, there is the problem of accurate adjustment already in the welding process and also a delay problem due to the welding heat. In addition, due to the large blade surface, there is a great deal of heat dissipation during the welding process, which is why high welding temperatures are required, which in turn increases the problems of distortion.
  • An inventive fan wheel is advantageously driven by a DC motor with bell rotor, wherein the bell rotor according to the invention forms the hub of the fan wheel. Since the mounting flanges are made of sheet steel as molded parts, a series production of mounting flanges by punching and bending is possible. However, production by a laser cutting method is also possible.
  • the wall thickness of the fastening flanges is greater, at least in the region of its contact section, than that of the wheel blades to be fastened.
  • a fan according to the invention from a hollow cylindrical hub 1, on the periphery of mounting flanges 2 are attached. Fan blades 3 are in turn attached to these mounting flanges 2.
  • the hub 1 consists of a hollow cylindrical bell, which is closed on one side and the front side has a hollow cylindrical rotor bushing 4 for receiving the rotor shaft in its interior.
  • the hub 1 is made of steel and can form the rotor of a DC motor.
  • mounting flanges 2 are circumferentially arranged substantially equidistantly and to these mounting flanges 2, the rotor blades 3 are screwed by means of a fastening screw 6.
  • the mounting flanges 2 consist according to the invention of steel or steel sheet. As a result, a simple and cost-effective production of the mounting flanges 2 is possible.
  • the mounting flanges 2 are circumferentially welded to the hub 1.
  • the mounting flanges 2 can also be conveniently prepared as stampings or stamped and bent parts. It may also be appropriate to cut them out by a laser cutting process.
  • the mounting flanges 2 are relatively compact, wherein the thickness of the mounting flanges 2 may be greater than the thickness of the fan blades to be fastened 3.
  • known welding methods for example Mac, laser or laser with additional material be applied.
  • the dimensions of a fan wheel according to the invention are, for example, 200 mm diameter of the hub 1 and, for example, 800 mm diameter of the entire fan wheel. Due to the inventive design, the size and orientation of the blades 3 can be varied as desired. By the invention, the number of blades or the mounting height can be varied much easier.
  • an inventive mounting flange 2 consists of a sheet steel stamped and bent part, which consists of a central contact portion 7, each with its longitudinal sides 8 bent stiffening webs 9.
  • the stiffening webs 9 have a substantially triangular shape, with the stiffening webs 9 tapering towards the free end of the abutment sections 7.
  • the result is a cross-sectionally U-shaped design of the mounting flanges 2, in particular in the lower mounting area, where they are welded to the hub 1.
  • the mounting flanges 2 are arranged on the circumference of the hub 1 so that the mounting flanges 2 protrude radially and extend on the hub wall 5 obliquely from the front to the back of the hub 1.
  • the size and orientation of the mounting flanges 2 can be varied according to the particular requirements of the individual fan wheel. Since both the hub 1 and the mounting flanges 2 are made of steel, a simple welding of the two parts is possible with conventional welding.
  • the fan blades 3 are fastened to the fastening flanges 2 in the region of their contact sections 7 on their contact side pointing in the direction of the front side of the hub 1. This attachment takes place by means of the fastening screw 6.
  • this screw 6 is screwed into an internal thread opening 10 of the respective fastening flange 2. How out Fig. 4 it can be seen, the threaded opening 10 is formed by a pointing in the direction of the rear hollow cylindrical projection 11.
  • the embodiment according to the invention makes it possible for fan blades 3 made of a very wide variety of materials to be fastened to the fastening flanges 2 can, for example, fan blades 3 made of metal or plastic. Also, blades 3 of die-cast or of corresponding metal material punched blades 3 can be used, these different blades 3 are all characterized by the same fastening. Also, it is possible by the invention to build blades 3 of larger engines with slow-rotating axial fans on smaller diameter engines, since the same type of fastening can be provided regardless of the blade size.

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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 vorliegende Erfindung betrifft ein Ventilatorrad bestehend aus einer Nabe, an deren Umfang Befestigungsflansche zur lösbaren Befestigung von Ventilatorschaufeln angeordnet sind.The present invention relates to a fan wheel consisting of a hub, on the periphery of mounting flanges for releasably securing fan blades are arranged.

Ein derartiges Ventilatorrad ist zum Beispiel aus der DE 39 41 691 C2 bekannt. Hierbei sind die Befestigungsflansche direkt an der Nabe angegossen, die gleichzeitig den Rotor eines als Außenläufermotor ausgebildeten Antriebsmotors bildet. Die Schaufeln des Ventilatorrades werden an diese Befestigungsflansche angeschraubt. Dies erfordert die Anfertigung teurer Gusswerkzeuge, wenn Ventilatorräder mit von einander abweichender Schaufelanzahl oder Stellung der Schaufeln hergestellt werden sollen.Such a fan is, for example, from the DE 39 41 691 C2 known. Here, the mounting flanges are cast directly on the hub, which also forms the rotor of a drive motor designed as an external rotor motor. The blades of the fan wheel are screwed to these mounting flanges. This requires the preparation of expensive casting tools when fan wheels are to be manufactured with differing number of blades or position of the blades.

Aus der DE 602 960 C ist eine geschweißte Flügelnabe bekannt, die aus einer vieleckigen kranzlosen Nabenscheibe besteht, an die senkrecht zu ihren Seitenflächen kreisrunde Platten angeschweißt sind, und zwar in gleicher Anzahl wie Flügel anzubringen sind. Diese geschweißte Flügelnabe soll zur Herstellung des Axialgebläses oder eines Axialventilators dienen.From the DE 602 960 C is known a welded wing hub, which consists of a polygonal wreathless hub disc, are welded to the perpendicular to their side surfaces circular plates, to be mounted in the same number as wings. This welded wing hub is to serve for the production of the axial fan or an axial fan.

Aus der EP 1571345 A1 ist ein Ventilatorrad bekannt, das eine hohlzylindrische Nabe aufweist, an deren Umfang Befestigungsflansche zur lösbaren Befestigung von Ventilatorschaufeln angeordnet sind. Dabei wird jede Ventilatorschaufel zwischen einem als Spritzgussteil ausgebildeten Befestigungsflansch und einem zusätzlichen als Spritzgussteil ausgebildeten Anschlussflansch geklemmt, wobei die beiden Flansche mittels einer Schraubverbindung miteinander befestigt werden.From the EP 1571345 A1 a fan wheel is known, which has a hollow cylindrical hub, on the periphery of mounting flanges for releasably securing fan blades are arranged. Each fan blade is clamped between a mounting flange formed as an injection molded part and an additional connecting flange formed as an injection molded part, wherein the two flanges are fastened to one another by means of a screw connection.

Der vorliegenden Erfindung liegt die Aufgabe zu Grunde, ausgehend von dem bekannten Ventilatorrad dieses derart zu verbessern, dass eine Fertigung mit beliebiger Schaufelzahl und stellung ohne teure Spezialwerkzeuge möglich ist, so dass eine große Fertigungs-Variationsbreite bei niedrigen Herstellungskosten erreicht wird.The present invention is based on the object, starting from the known fan wheel to improve this so that a production with any number of blades and position without expensive special tools is possible, so that a large manufacturing variation width is achieved at low production costs.

Erfindungsgemäß wird dies dadurch erreicht, dass ein Ventilatorrad verwendet wird, bei dem die hohlzylindrische Nabe aus Stahl hergestellt ist und die Befestigungsflansche aus Stahl bestehen und mit der Nabe durch Schweißen verbunden sind, und die Befestigungsflansche aus Stahlblech als Form- oder Formbiegeteile ausgebildet sind.According to the invention this is achieved in that a fan wheel is used, in which the hollow cylindrical hub is made of steel and the mounting flanges are made of steel and are connected to the hub by welding, and the mounting flanges are made of sheet steel as a molded or bent parts.

Die Erfindung geht von der Erkenntnis aus, dass im Gegensatz zu großflächigen Metallschaufeln sich die Befestigungsflansche problemlos anschweißen lassen. Denn diese besitzen eine relativ kleine Masse und sind kompakt ausgeführt. Im Gegensatz dazu besteht beim Anschweißen der Ventilatorschaufeln als Ganzes das Problem der genauen Justage schon beim Schweißvorgang und zudem ein Verzugsproblem auf Grund der Schweißwärme. Zudem erfolgt über die große Schaufelfläche eine starke Wärmeabfuhr während des Schweißvorgangs, weshalb hohe Schweißtemperaturen erforderlich sind, was wiederum die Verzugsprobleme erhöht. Ein erfindungsgemäßes Ventilatorrad wird vorteilhafterweise mit einem Gleichstrommotor mit Glockenrotor angetrieben, wobei der Glockenrotor erfindungsgemäß die Nabe des Ventilatorrades bildet. Da die Befestigungsflansche aus Stahlblech als Formteile ausgebildet sind, ist eine Serienfertigung der Befestigungsflansche durch Stanzen und Biegen möglich. Jedoch ist auch eine Herstellung durch ein Laserschneidverfahren möglich.The invention is based on the recognition that, in contrast to large-area metal blades, the mounting flanges can weld easily. Because these have a relatively small mass and are compact. In contrast, when welding the fan blades as a whole, there is the problem of accurate adjustment already in the welding process and also a delay problem due to the welding heat. In addition, due to the large blade surface, there is a great deal of heat dissipation during the welding process, which is why high welding temperatures are required, which in turn increases the problems of distortion. An inventive fan wheel is advantageously driven by a DC motor with bell rotor, wherein the bell rotor according to the invention forms the hub of the fan wheel. Since the mounting flanges are made of sheet steel as molded parts, a series production of mounting flanges by punching and bending is possible. However, production by a laser cutting method is also possible.

Vorteilhaft ist es erfindungsgemäß weiterhin, wenn die Wandstärke der Befestigungsflansche zumindest im Bereich ihres Anlageabschnittes größer ist als die der zu befestigenden Radschaufeln. Hierdurch kann die Festigkeit gegenüber herkömmlichen 6efestigungsmöglichkeiten erheblich vergrößert werden.According to the invention, it is furthermore advantageous if the wall thickness of the fastening flanges is greater, at least in the region of its contact section, than that of the wheel blades to be fastened. As a result, the strength compared to conventional 6e attachment possibilities can be significantly increased.

Weitere vorteilhafte Ausführungen der Erfindung sind in den Unteransprüchen enthalten.Further advantageous embodiments of the invention are contained in the subclaims.

An Hand der in den beiliegenden Zeichnungen dargestellten Ausführungsbeispiele wird die Erfindung näher erläutern. Es zeigen:

Fig. 1
eine Draufsicht auf ein erfindungsgemäßes Ventilatorrad,
Fig. 2
eine Rückansicht des Ventilatorrades gemäß Fig. 1,
Fig.3
eine Einzelheit zur Darstellung eines erfindungsgemäßen Befestigungsflansches gemäß Fig. 1.
Fig. 4
eine rückseitige Ansicht des Befestigungsflansches gemäß Fig. 3,
Fig. 5
eine alternative Ausführungsform eines Befestigungsflansches gemäß Fg. 3,
Fig. 6
eine Rückansicht des Befestigungsflansches gemäß Fig. 5 und
Fig. 7
eine Detailansicht eines erfindungsgemäßen Ventilatorrades passend zu der Ausführung gemäß Fig. 5 und 6.
With reference to the embodiments illustrated in the accompanying drawings, the invention will be explained in more detail. Show it:
Fig. 1
a plan view of a fan according to the invention,
Fig. 2
a rear view of the fan wheel according to Fig. 1 .
Figure 3
a detail to illustrate a mounting flange according to the invention according to Fig. 1 ,
Fig. 4
a rear view of the mounting flange according to Fig. 3 .
Fig. 5
an alternative embodiment of a mounting flange according to FIG. 3,
Fig. 6
a rear view of the mounting flange according to Fig. 5 and
Fig. 7
a detailed view of a fan according to the invention according to the embodiment according to FIGS. 5 and 6 ,

Wie sich aus Fig. 1 und Fig. 2 ergibt, besteht ein erfindungsgemäßes Ventilatorrad aus einer hohlzylindrischen Nabe 1, an deren Umfang Befestigungsflansche 2 befestigt sind. An diesen Befestigungsflanschen 2 sind wiederum Ventilatorschaufeln 3 befestigt. Wie sich aus den Fig. 1 und 2 ableitet, besteht die Nabe 1 aus einer hohlzylindrischen Glocke, die einseitig geschlossen ist und die in ihrem Innern stirnseitig eine hohlzylindrische Rotorbuchse 4 zur Aufnahme der Rotorwelle aufweist. Die Nabe 1 besteht aus Stahl und kann den Rotor eines Gleichstrommotors bilden. An der Außenseite Ihrer Nabenwandung 5 weist diese eine Vielzahl von Befestigungsflanschen 2 auf, siehe insbesondere Fig. 2. Im vorliegenden Fall sind fünf Befestigungsflansche 2 umfangsgemäß im Wesentlichen äquidistant angeordnet und an diese Befestigungsflansche 2 sind die Rotorschaufeln 3 mittels einer Befestigungsschraube 6 angeschraubt. Die Befestigungsflansche 2 bestehen erfindungsgemäß aus Stahl bzw. Stahlblech. Hierdurch ist eine einfache und kostengünstige Herstellung der Befestigungsflansche 2 möglich. Die Befestigungsflansche 2 werden umfangsgemäß an die Nabe 1 angeschweißt. Die Befestigungsflansche 2 können auch zweckmäßigerweise als Stanzteile oder Stanzbiegeteile hergestellt sein. Ebenfalls kann es zweckmäßig sein, sie durch ein Laserschneidverfahren auszuschneiden. Die Befestigungsflansche 2 sind relativ kompakt ausgebildet, wobei die Dicke der Befestigungsflansche 2 größer sein kann als die Dicke der zu befestigenden Ventilatorschaufeln 3. Als Schweißverfahren zum Anschweißen der Befestigungsflansche 2 an die Nabe 1 können bekannte Schweißverfahren, zum Beispiel Mac, Laser oder Laser mit Zusatzmaterial angewendet werden. Die Abmessungen eines erfindungsgemäßen Ventilatorrades betragen beispielsweise 200 mm Durchmesser der Nabe 1 und beispielsweise 800 mm Durchmesser des gesamten Ventilatorrades. Auf Grund der erfindungsgemäßen Ausgestaltung kann die Größe und Ausrichtung der Schaufeln 3 beliebig variiert werden. Durch die Erfindung kann die Schaufelzahl bzw. die Befestigungshöhe wesentlich einfacher variiert werden.As it turned out Fig. 1 and Fig. 2 results, there is a fan according to the invention from a hollow cylindrical hub 1, on the periphery of mounting flanges 2 are attached. Fan blades 3 are in turn attached to these mounting flanges 2. As is clear from the Fig. 1 and 2 derives, the hub 1 consists of a hollow cylindrical bell, which is closed on one side and the front side has a hollow cylindrical rotor bushing 4 for receiving the rotor shaft in its interior. The hub 1 is made of steel and can form the rotor of a DC motor. On the outside of your hub wall 5, this has a plurality of mounting flanges 2, see in particular Fig. 2 , In the present case, five mounting flanges 2 are circumferentially arranged substantially equidistantly and to these mounting flanges 2, the rotor blades 3 are screwed by means of a fastening screw 6. The mounting flanges 2 consist according to the invention of steel or steel sheet. As a result, a simple and cost-effective production of the mounting flanges 2 is possible. The mounting flanges 2 are circumferentially welded to the hub 1. The mounting flanges 2 can also be conveniently prepared as stampings or stamped and bent parts. It may also be appropriate to cut them out by a laser cutting process. The mounting flanges 2 are relatively compact, wherein the thickness of the mounting flanges 2 may be greater than the thickness of the fan blades to be fastened 3. As a welding method for welding the mounting flanges 2 to the hub 1 known welding methods, for example Mac, laser or laser with additional material be applied. The dimensions of a fan wheel according to the invention are, for example, 200 mm diameter of the hub 1 and, for example, 800 mm diameter of the entire fan wheel. Due to the inventive design, the size and orientation of the blades 3 can be varied as desired. By the invention, the number of blades or the mounting height can be varied much easier.

Wie sich insbesondere aus den Fig. 3 und 4 ergibt, besteht ein erfindungsgemäßer Befestigungsflansch 2 aus einem Stahlblech-Stanzbiegeteil, das aus einem mittleren Anlageabschnitt 7 mit jeweils an seinen Längsseiten 8 umgebogenen Versteifungsstegen 9 besteht. Die Versteifungsstege 9 haben eine im Wesentlichen dreieckförmige Form, wobei die Versteifungsstege 9 zum freien Ende der Anlageabschnitte 7 spitz zulaufen. Es ergibt sich eine im Querschnitt U-förmige Ausbildung der Befestigungsflansche 2, insbesondere im unteren Befestigungsbereich, wo diese an die Nabe 1 angeschweißt sind. Die Befestigungsflansche 2 werden dabei so am Umfang der Nabe 1 angeordnet, dass die Befestigungsflansche 2 radial abstehen und auf der Nabenwandung 5 schräg von der Vorderseite zur Rückseite der Nabe 1 verlaufen. Die Größe und Ausrichtung der Befestigungsflansche 2 kann nach den jeweiligen Vorgaben des einzelnen Ventilatorrades beliebig variiert werden. Da sowohl die Nabe 1 als auch die Befestigungsflansche 2 aus Stahl bestehen, ist eine einfache Verschweißung der beiden Teile mit üblichen Schweißverfahren möglich. Die Ventilatorschaufeln 3 werden an den Befestigungsflanschen 2 im Bereich ihrer Anlageabschnitte 7 auf deren in Richtung der Vorderseite der Nabe 1 weisenden Anlageseite befestigt. Diese Befestigung erfolgt mittels der Befestigungsschraube 6. Diese Schraube 6 wird hierzu in eine Innengewindeöffnung 10 des jeweiligen Befestigungsflansches 2 eingeschraubt. Wie aus Fig. 4 ersichtlich ist, wird die Gewindeöffnung 10 durch einen in Richtung der Rückseite weisenden hohlzylinderförmigen Ansatz 11 gebildet. Zur Ausrichtung der Ventilatorschaufeln 3 auf den Befestigungsflanschen 2 weisen diese gegenüber der Gewindeöffnung 10 in Richtung auf die Nabe 1 versetzt angeordnete Ansätze 12 auf, die aus der Anlagefläche des Anlageabschnittes 7 hervorstehen und eine abgerundete Umfangskontur aufweisen. Mit diesen Ansätzen 12 werden die Ventilatorschaufeln 3 ausgerichtet, weshalb diese in ihrem Fußbereich entsprechende Aussparungen 15 aufweisen, wie dies in den Fig. 1 und 2 gezeigt ist. Diese Ansätze 12 sind in den Aussparungen 15 mit Spiel angeordnet.As can be seen in particular from the 3 and 4 results, an inventive mounting flange 2 consists of a sheet steel stamped and bent part, which consists of a central contact portion 7, each with its longitudinal sides 8 bent stiffening webs 9. The stiffening webs 9 have a substantially triangular shape, with the stiffening webs 9 tapering towards the free end of the abutment sections 7. The result is a cross-sectionally U-shaped design of the mounting flanges 2, in particular in the lower mounting area, where they are welded to the hub 1. The mounting flanges 2 are arranged on the circumference of the hub 1 so that the mounting flanges 2 protrude radially and extend on the hub wall 5 obliquely from the front to the back of the hub 1. The size and orientation of the mounting flanges 2 can be varied according to the particular requirements of the individual fan wheel. Since both the hub 1 and the mounting flanges 2 are made of steel, a simple welding of the two parts is possible with conventional welding. The fan blades 3 are fastened to the fastening flanges 2 in the region of their contact sections 7 on their contact side pointing in the direction of the front side of the hub 1. This attachment takes place by means of the fastening screw 6. For this purpose, this screw 6 is screwed into an internal thread opening 10 of the respective fastening flange 2. How out Fig. 4 it can be seen, the threaded opening 10 is formed by a pointing in the direction of the rear hollow cylindrical projection 11. To align the fan blades 3 on the mounting flanges 2, these have opposite the threaded opening 10 in the direction of the hub 1 staggered lugs 12 which protrude from the contact surface of the abutment portion 7 and have a rounded peripheral contour. With these approaches 12, the fan blades 3 are aligned, which is why they have in their foot corresponding recesses 15, as in the Fig. 1 and 2 is shown. These lugs 12 are arranged in the recesses 15 with game.

Eine Variante hierzu ist in den Fig. 5, 6 und 7 dargestellt, wobei im Übrigen gleiche Teile mit denselben Bezugsziffern wie in den vorhergehenden Fig. gekennzeichnet sind. Hierbei sind oberhalb und unterhalb der Gewindeöffnung 10 jeweils parallel verlaufende Schlitze 13 ausgeprägt, in die entsprechend angepasste Stegansätze 14 an den Schaufeln 3 hineinragen. Diese Stegansätze 14 sind in den entsprechenden Schlitzen 13 der Befestigungsflansche 2 zumindest mit umfangsgemäßem Spiel angeordnet. Hierdurch kann eine exakte Positionierung der Ventilatorschaufeln 3 auf den Befestigungsflanschen 2 erfolgen. Die Stegansätze 14 sind jeweils auf beiden Seiten der Ventilatorschaufeln 3 durch diese ausgebildet, so dass die Schaufeln 3 um 180° gedreht werden können, wenn eine andere Förderrichtung des Ventilators gewünscht ist.A variant of this is in the Fig. 5, 6 and 7 the same parts are identified by the same reference numerals as in the preceding figures. In this case, above and below the threaded opening 10 in each case parallel slits 13 are pronounced, protrude into the correspondingly adapted web extensions 14 on the blades 3. These web extensions 14 are arranged in the corresponding slots 13 of the mounting flanges 2 at least with circumferential play. This allows an exact positioning of the fan blades 3 on the mounting flanges 2 done. The web projections 14 are respectively formed on both sides of the fan blades 3 by these, so that the blades 3 can be rotated by 180 °, if a different conveying direction of the fan is desired.

Die erfindungsgemäße Ausgestaltung macht es möglich, dass Ventilatorschaufeln 3 aus unterschiedlichsten Materialien an den Befestigungsflanschen 2 befestigt werden können, so zum Beispiel Ventilatorschaufeln 3 aus Metall oder Kunststoff. Auch können Schaufeln 3 aus Druckguss oder aus entsprechendem Metallmaterial gestanzte Schaufeln 3 verwendet werden, wobei diese verschiedenen Schaufeln 3 sich alle durch die gleiche Befestigungsart auszeichnen. Auch ist es durch die Erfindung möglich, Schaufeln 3 von größeren Motoren bei langsam drehenden Axiallüftern auch auf im Durchmesser kleineren Motoren aufzubauen, da die gleiche Befestigungsart unabhängig von der Schaufelgröße vorgesehen sein kann.The embodiment according to the invention makes it possible for fan blades 3 made of a very wide variety of materials to be fastened to the fastening flanges 2 can, for example, fan blades 3 made of metal or plastic. Also, blades 3 of die-cast or of corresponding metal material punched blades 3 can be used, these different blades 3 are all characterized by the same fastening. Also, it is possible by the invention to build blades 3 of larger engines with slow-rotating axial fans on smaller diameter engines, since the same type of fastening can be provided regardless of the blade size.

Claims (6)

  1. A ventilator wheel comprising a hollow-cylindrical hub (1) at the circumference of which there are arranged securing flanges (2) for the detachable securing of ventilator blades (3), characterised in that the hollow-cylindrical hub (1) is manufactured of steel and the securing flanges (2) are made of steel and are connected to the hub (1) by welding and formed of steel sheet in the form of shaped or shaped bent parts.
  2. A ventilator wheel according to claim 1, characterised in that the securing flanges (2) comprise a plane contact portion (7) and stiffening webs (9) which are bent at the two facing longitudinal sides (8) of the contact portion (7).
  3. A ventilator wheel according to claim 2, characterised in that at least one internally threaded opening (10) as well as orienting means (12, 13, 14, 15) to secure the fan blades (3) are formed in the contact portion (7).
  4. A ventilator wheel according to claim 3, characterised in that the internally threaded opening (10) is formed in a hollow-cylindrical attachment (11).
  5. A ventilator wheel according to any one of claims 1 to 4, characterised in that the wall thickness of the securing flanges (2) is, at least in the region of the contact region with the hub (1), greater than the thickness of the ventilator blades (3).
  6. A ventilator wheel according to any one of claims 1 to 5, characterised in that the ventilator blades (3) are made of metal, plastics material or cast material.
EP07788146A 2006-08-03 2007-08-01 Ventilator wheel Active EP1934483B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202006011899U DE202006011899U1 (en) 2006-08-03 2006-08-03 fan wheel
PCT/EP2007/057981 WO2008015245A1 (en) 2006-08-03 2007-08-01 'ventilator wheel'

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EP1934483A1 EP1934483A1 (en) 2008-06-25
EP1934483B1 true EP1934483B1 (en) 2012-11-14

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EP07788146A Active EP1934483B1 (en) 2006-08-03 2007-08-01 Ventilator wheel

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US (1) US8128372B2 (en)
EP (1) EP1934483B1 (en)
CN (1) CN101479484B (en)
DE (1) DE202006011899U1 (en)
DK (1) DK1934483T3 (en)
ES (1) ES2395489T3 (en)
PT (1) PT1934483E (en)
WO (1) WO2008015245A1 (en)

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Also Published As

Publication number Publication date
US8128372B2 (en) 2012-03-06
CN101479484B (en) 2013-03-20
DK1934483T3 (en) 2013-03-04
DE202006011899U1 (en) 2007-12-13
WO2008015245A1 (en) 2008-02-07
US20100003140A1 (en) 2010-01-07
CN101479484A (en) 2009-07-08
PT1934483E (en) 2012-12-04
EP1934483A1 (en) 2008-06-25
ES2395489T3 (en) 2013-02-13

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