EP3198150B1 - Fan wheel - Google Patents

Fan wheel Download PDF

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Publication number
EP3198150B1
EP3198150B1 EP15759482.1A EP15759482A EP3198150B1 EP 3198150 B1 EP3198150 B1 EP 3198150B1 EP 15759482 A EP15759482 A EP 15759482A EP 3198150 B1 EP3198150 B1 EP 3198150B1
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EP
European Patent Office
Prior art keywords
fan
hub
fan blade
fan wheel
rib
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EP15759482.1A
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German (de)
French (fr)
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EP3198150A1 (en
Inventor
Uwe Aschermann
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.)
Mahle International GmbH
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Mahle International GmbH
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Publication of EP3198150A1 publication Critical patent/EP3198150A1/en
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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
    • F04D29/26—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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F04D19/002—Axial flow fans
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations

Definitions

  • the invention relates to a fan wheel, in particular for conveying cooling air, in particular for an internal combustion engine, comprising a hub on which a plurality of fan blades are arranged and the hub having a rib structure.
  • So-called viscous fans for engine cooling are attached to the crankshaft of the internal combustion engine by means of a fluid friction clutch, a so-called viscous clutch, and supply the internal combustion engine with air for cooling. Vibrations of the internal combustion engine are thus transmitted to the fan via the clutch. The fan thus experiences strong vibrations in all directions, both as axial displacements and in the form of tilting.
  • an impeller for a semi-axial fan which has a hub on which a plurality of fan blades are arranged.
  • the hub of the fan is provided with a hub ramp, which is arranged rising on the outside of the hub.
  • the hub itself is provided with cavities which are separated from one another by radially extending web parts. With this open hub structure, the fan blades go directly into the flat hub.
  • the DE 100 05 857 A1 discloses an impeller, in particular for a fan set, in which the hub comprises a substantially annular wall which is centered on the axis of rotation of the impeller.
  • the blades are connected to a circumferential outer surface which delimits the annular wall of the hub.
  • the circumferential surface comprises two zones that are axially separated by the wings.
  • a fan for cooling an internal combustion engine which has a hub structure designed as an auxiliary structure.
  • This hub structure has both radial and diagonal and crossed webs to increase the stability of the fan.
  • Such a hub structure is very complex to manufacture and is not always sufficient to compensate for vibrations of the internal combustion engine, which cause strong excitation in the tilting and bending direction of the fan.
  • the fan wheel for conveying cooling air in particular for an internal combustion engine, has a flat, ring-shaped hub on which a plurality of fan blades are arranged, the hub having a circumferential rib structure.
  • the rib structure according to the invention consists of rectangular and flat ribs with an edge region which rest with their edge region on the hub and essentially tangentially to the circumferential direction the hub are aligned in their longitudinal extent, touching each other. As a result, the ribs reach a predetermined length so that they run sufficiently close to a center of the fan wheel.
  • the circumferential rib structure is thus polygonal or angular, which means, in the case of crossing ribs, in particular the radially outer outer contour of the rib structure.
  • Each rib which has just been formed advantageously runs from one fan blade to another fan blade. This configuration gives the ribs a predetermined length, by means of which they can be passed close to the center of the fan wheel.
  • the rib just formed extends from the first fan blade to the fan blade arranged directly next to it.
  • it can be straight trained rib run in an alternative from the first fan blade to the fan blade after next.
  • the newly formed rib runs from one fan blade to the third fan blade next to it.
  • the dynamic strength of the fan is increased by crossing the ribs which have just been formed and which emanate from the various fan blades and lead to the corresponding first, second or third fan blade.
  • the ribs which are so flat or straight, run close to the screwing-on points of the coupling without crossing.
  • a development of the invention relates to a viscous fan, in particular for conveying cooling air for an internal combustion engine, comprising a fan wheel which is connected to a shaft of the internal combustion engine via a viscous coupling.
  • the fan wheel of this viscous coupling has at least one feature according to the invention.
  • FIG. 1 A first exemplary embodiment of the fan wheel 1 according to the invention is shown, which has a flat, ring-shaped hub 2, on which a plurality of fan blades 3 are arranged, which extend approximately outward in the radial direction.
  • the fastening points 4 for a viscous coupling are shown, to which the fan wheel 1 can be fastened and via which the fan wheel 1 can be connected to a shaft of an internal combustion engine.
  • Various webs 5 are attached to the flat, annular hub 2, which are flat and rectangular and lead from a fan blade 3 to the fan blade 6 immediately following.
  • the webs 5 touch at their respective ends in the circumferential direction of the hub 2 and do not cross.
  • a web 5 begins approximately at the level of one of the edges of a fan blade 3 and ends approximately at the other edge of the fan blade 3.
  • the Figure 2 shows a fan wheel 7, in which on the flat, annular hub also rectangular and flat webs 8 are arranged between the fan blades 3,9.
  • the individual webs 8 each lead from one edge of a fan blade 3 to the corresponding edge of the fan blade 9 but one, the webs 8 cross each other twice.
  • the web 8, which begins at the front edge of the fan blade 3 leads in the direction of rotation to the front edge of the fan blade 9 after next.
  • the web 8 ending on a fan blade 3, 9 adjoins the further web 8, which starts from the same fan blade 3, 9, an angle being included between the two webs.
  • This design in which a straight web 8 leads from each fan blade 3 to the fan blade 9 next but one, results in a particularly stable structure which prevents the dynamic strength of the fan wheel 7 against axial displacement and / or tilting.
  • the rigidity of the fan wheel 7 is thus increased according to the invention.
  • a highly networked structure of the flat and rectangular webs 11 can be seen on the flat, annular hub 2, with one web 11 extending from one fan blade 3 to the third next fan blade 12.
  • a web starts at a front edge of a fan blade 3 and ends at the front edge of the third next fan blade 12.
  • the webs 11 cross each other four times along the extension of a web 11, the webs 11 crossing one another thereby forming a symmetrical structure.
  • the webs 11 are brought relatively close to the center, that is to the axis of rotation, of the fan wheel 10 and ensure this a sufficient rigidity.
  • the Figure 4 shows a further embodiment of the fan wheel 13, in which the flat and rectangular webs 13 run particularly close to the attachment points 4 of the viscous coupling.
  • the fan wheel 13 comprises eleven fan blades 3, which are stabilized by means of six straight webs 14 which do not intersect with one another.
  • three webs extend along the half the circumference of the hub 2.
  • such a design can be combined with a classic rib principle of the hub 2.
  • Hub ramps can be provided, or optionally can also be dispensed with in the solutions described.
  • the designs according to the invention can in particular also be used for designs according to the DE 10 2010 042 325 A1 be used.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

Technisches GebietTechnical field

Die Erfindung betrifft ein Lüfterrad, insbesondere zur Förderung von Kühlluft, insbesondere für eine Brennkraftmaschine, umfassend eine Nabe, an welcher eine Mehrzahl von Lüfterblättern angeordnet ist und wobei die Nabe eine Rippenstruktur aufweist.The invention relates to a fan wheel, in particular for conveying cooling air, in particular for an internal combustion engine, comprising a hub on which a plurality of fan blades are arranged and the hub having a rib structure.

Stand der TechnikState of the art

So genannte Viscolüfter zur Motorkühlung sind mittels einer Fluidreibungskupplung, einer so genannten Viscokupplung, an der Kurbelwelle des Verbrennungsmotors befestigt und führen dem Verbrennungsmotor Luft zur Kühlung zu. Schwingungen des Verbrennungsmotors werden somit über die Kupplung auf den Lüfter übertragen. Der Lüfter erfährt somit starke Schwingungsanregungen in alle Richtungen, sowohl als axiale Verschiebungen aber auch in Form von Verkippungen.So-called viscous fans for engine cooling are attached to the crankshaft of the internal combustion engine by means of a fluid friction clutch, a so-called viscous clutch, and supply the internal combustion engine with air for cooling. Vibrations of the internal combustion engine are thus transmitted to the fan via the clutch. The fan thus experiences strong vibrations in all directions, both as axial displacements and in the form of tilting.

Aus der DE 41 17 342 C1 ist ein Laufrad für einen halbaxial wirkenden Lüfter bekannt, welches eine Nabe aufweist, an der eine Mehrzahl von Lüfterblättern angeordnet ist. Die Nabe des Lüfters ist mit einer Nabenrampe versehen, welche an der Außenseite der Nabe ansteigend angeordnet ist. Die Nabe selbst ist mit Hohlräumen versehen, die durch radial verlaufende Stegteile gegeneinander abgetrennt sind. Bei dieser offenen Nabenstruktur gehen die Lüfterblätter direkt in die flache Nabe über.From the DE 41 17 342 C1 an impeller for a semi-axial fan is known which has a hub on which a plurality of fan blades are arranged. The hub of the fan is provided with a hub ramp, which is arranged rising on the outside of the hub. The hub itself is provided with cavities which are separated from one another by radially extending web parts. With this open hub structure, the fan blades go directly into the flat hub.

Die DE 100 05 857 A1 offenbart ein Flügelrad, insbesondere für einen Lüftersatz, bei weichem die Nabe eine im Wesentlichen ringförmige Wand umfasst, die auf die Umdrehungsachse des Flügelrades zentriert ist. Die Flügel sind mit einer umlaufenden Außenfläche verbunden, welche die ringförmige Wand der Nabe begrenzt. Die umfängliche Fläche umfasst dabei zwei Zonen, die axial durch die Flügel getrennt sind.The DE 100 05 857 A1 discloses an impeller, in particular for a fan set, in which the hub comprises a substantially annular wall which is centered on the axis of rotation of the impeller. The blades are connected to a circumferential outer surface which delimits the annular wall of the hub. The circumferential surface comprises two zones that are axially separated by the wings.

Aus der US 6,375,427 B1 ist ein Lüfter zur Kühlung eines Verbrennungsmotors bekannt, welcher eine als Hilfsstruktur ausgebildete Nabenstruktur aufweist. Diese Nabenstruktur weist sowohl radial verlaufende als auch diagonal und gekreuzt verlaufende Stege auf, um die Stabilität des Lüfters zu erhöhen.From the US 6,375,427 B1 A fan for cooling an internal combustion engine is known which has a hub structure designed as an auxiliary structure. This hub structure has both radial and diagonal and crossed webs to increase the stability of the fan.

Eine solche Nabenstruktur ist sehr aufwändig in der Herstellung und reicht nicht immer aus, um Vibrationen des Verbrennungsmotors auszugleichen, die eine starke Anregung in Kipp- und Biegerichtung des Lüfters hervorrufen.Such a hub structure is very complex to manufacture and is not always sufficient to compensate for vibrations of the internal combustion engine, which cause strong excitation in the tilting and bending direction of the fan.

Darstellung der Erfindung, Aufgabe, Lösung, VorteilePresentation of the invention, task, solution, advantages

Es ist die Aufgabe der Erfindung, ein Lüfterrad zur Förderung von Kühlluft, insbesondere für eine Brennkraftmaschine, zu schaffen, welches trotz konstruktiv einfachem Aufbau einen höheren Widerstand gegenüber einer Durchbiegung des Lüfterrades bietet.It is the object of the invention to create a fan wheel for conveying cooling air, in particular for an internal combustion engine, which, despite its simple construction, offers greater resistance to deflection of the fan wheel.

Diese Aufgabe wird mit einem Lüfterrad mit den Merkmalen von Anspruch 1 gelöst.This object is achieved with a fan wheel with the features of claim 1.

Erfindungsgemäß weist das Lüfterrad zur Förderung von Kühlluft, insbesondere für eine Brennkraftmaschine, eine flache, ringförmige Nabe auf, an welcher eine Mehrzahl von Lüfterblättern angeordnet ist, wobei die Nabe eine umlaufende Rippenstruktur aufweist. Bei einem Lüfterrad, was konstruktiv einfach aufgebaut ist und trotzdem einen hohen Widerstand gegen Verkippen und Verbiegung des Lüfterrades aufweist, besteht die Rippenstruktur erfindungsgemäß aus rechteckigen und eben ausgebildeten Rippen mit einem Randbereich, die mit ihrem Randbereich auf der Nabe aufsitzen und im Wesentlichen tangential zur Umfangsrichtung der Nabe in ihrer Längserstreckung ausgerichtet sind, wobei sie sich untereinander berühren. Dadurch erreichen die Rippen eine vorgegebene Länge, so dass diese ausreichend nah an einem Zentrum des Lüfterrades verlaufen. Dies hat den Vorteil, dass ein hoher Widerstand, insbesondere durch die lang ausgebildeten Rippen, gegen Durchbiegen des Lüfterrades erzeugt und dadurch die dynamische Festigkeit des Lüfters erhöht wird. Da die ebenen Rippen auf der flach ausgebildeten Nabe befestigt sind, entfällt eine aufwendige Nabenstruktur.According to the invention, the fan wheel for conveying cooling air, in particular for an internal combustion engine, has a flat, ring-shaped hub on which a plurality of fan blades are arranged, the hub having a circumferential rib structure. In the case of a fan wheel, which is structurally simple and yet has a high resistance to tilting and bending of the fan wheel, the rib structure according to the invention consists of rectangular and flat ribs with an edge region which rest with their edge region on the hub and essentially tangentially to the circumferential direction the hub are aligned in their longitudinal extent, touching each other. As a result, the ribs reach a predetermined length so that they run sufficiently close to a center of the fan wheel. This has the advantage that a high resistance, in particular due to the long ribs, against bending of the fan wheel is generated, thereby increasing the dynamic strength of the fan. Since the flat ribs are attached to the flat hub, there is no need for a complex hub structure.

Die umlaufende Rippenstruktur ist somit polygonal oder eckig ausgebildet, wobei damit bei sich kreuzenden Rippen insbesondere die radial außen liegende Außenkontur der Rippenstruktur gemeint ist.The circumferential rib structure is thus polygonal or angular, which means, in the case of crossing ribs, in particular the radially outer outer contour of the rib structure.

Vorteilhafterweise verläuft jede eben ausgebildete Rippe von einem Lüfterblatt zu einem anderen Lüfterblatt. Durch diese Ausgestaltung erhalten die Rippen eine vorgegebene Länge, mittels welcher sie nah am Zentrum des Lüfterrades vorbeigeführt werden können.Each rib which has just been formed advantageously runs from one fan blade to another fan blade. This configuration gives the ribs a predetermined length, by means of which they can be passed close to the center of the fan wheel.

In einer Ausgestaltung verläuft die eben ausgebildete Rippe von dem ersten Lüfterblatt zum unmittelbar daneben angeordneten Lüfterblatt. Um die Versteifung und Festigkeit des Lüfters weiter zu erhöhen, kann die gerade ausgebildete Rippe in einer Alternative vom ersten Lüfterblatt zum übernächsten Lüfterblatt verlaufen. Es ist aber auch vorstellbar, dass die eben ausgebildete Rippe von einem Lüfterblatt zum drittnächsten Lüfterblatt verläuft. Durch die Kreuzung der eben ausgebildeten Rippen, die von den verschiedenen Lüfterblättern ausgehen und zu dem entsprechenden ersten, zweiten oder drittnächsten Lüfterblatt führen, wird die dynamische Festigkeit des Lüfters erhöht.In one configuration, the rib just formed extends from the first fan blade to the fan blade arranged directly next to it. To further increase the stiffening and strength of the fan, it can be straight trained rib run in an alternative from the first fan blade to the fan blade after next. However, it is also conceivable that the newly formed rib runs from one fan blade to the third fan blade next to it. The dynamic strength of the fan is increased by crossing the ribs which have just been formed and which emanate from the various fan blades and lead to the corresponding first, second or third fan blade.

Um die Versteifung des Lüfters im Bereich der Befestigungspunkte einer Kupplung zu erhöhen, verlaufen die derart eben bzw. gerade ausgebildeten Rippen nahe an den Anschraubpunkten der Kupplung, ohne sich zu kreuzen.In order to increase the stiffening of the fan in the area of the attachment points of a coupling, the ribs, which are so flat or straight, run close to the screwing-on points of the coupling without crossing.

Eine Weiterbildung der Erfindung betrifft einen Viscolüfter insbesondere zur Förderung einer Kühlluft für eine Brennkraftmaschine, umfassend ein Lüfterrad, welches über eine Viscokupplung mit einer Welle der Brennkraftmaschine verbunden ist. Das Lüfterrad dieser Viscokupplung weist dabei mindestens ein erfindungsgemäßes Merkmal auf.A development of the invention relates to a viscous fan, in particular for conveying cooling air for an internal combustion engine, comprising a fan wheel which is connected to a shaft of the internal combustion engine via a viscous coupling. The fan wheel of this viscous coupling has at least one feature according to the invention.

Weitere vorteilhafte Ausgestaltungen sind durch die nachfolgende Figurenbeschreibung und durch die Unteransprüche beschrieben.Further advantageous configurations are described by the following description of the figures and by the subclaims.

Kurze Beschreibung der Figuren der ZeichnungBrief description of the figures of the drawing

Nachstehend wird die Erfindung auf der Grundlage zumindest eines Ausführungsbeispiels anhand der Figuren der Zeichnung näher erläutert. Es zeigen:

Figur 1
ein erstes Ausführungsbeispiel des erfindungsgemäßen Lüfterrades,
Figur 2
ein zweites Ausführungsbeispiel des erfindungsgemäßen Lüfterrades,
Figur 3
ein drittes Ausführungsbeispiel des erfindungsgemäßen Lüfterrades, und
Figur 4
ein viertes Ausführungsbeispiel des erfindungsgemäßen Lüfterrades.
The invention is explained in more detail below on the basis of at least one exemplary embodiment with reference to the figures of the drawing. Show it:
Figure 1
a first embodiment of the fan wheel according to the invention,
Figure 2
a second embodiment of the fan wheel according to the invention,
Figure 3
a third embodiment of the fan wheel according to the invention, and
Figure 4
a fourth embodiment of the fan wheel according to the invention.

Bevorzugte Ausführung der ErfindungPreferred embodiment of the invention

In Figur 1 ist ein erstes Ausführungsbeispiel des erfindungsgemäßen Lüfterrades 1 dargestellt, welches eine flache, ringförmige Nabe 2 aufweist, an der mehrere Lüfterblätter 3 angeordnet sind, die sich etwa in radialer Richtung nach außen erstrecken. Am radial inneren Rand der Nabe 2 sind die Befestigungspunkte 4 für eine nicht weiter dargestellte Viscokupplung gezeigt, an welcher das Lüfterrad 1 befestigbar ist und über welche das Lüfterrad 1 mit einer Welle eines Verbrennungsmotors verbindbar ist.In Figure 1 A first exemplary embodiment of the fan wheel 1 according to the invention is shown, which has a flat, ring-shaped hub 2, on which a plurality of fan blades 3 are arranged, which extend approximately outward in the radial direction. On the radially inner edge of the hub 2, the fastening points 4 for a viscous coupling, not shown, are shown, to which the fan wheel 1 can be fastened and via which the fan wheel 1 can be connected to a shaft of an internal combustion engine.

Auf der flachen, ringförmigen Nabe 2 sind verschiedene Stege 5 befestigt, die eben und rechteckig ausgeführt sind und von einem Lüfterblatt 3 zum unmittelbar darauf nachfolgenden Lüfterblatt 6 führen. Die Stege 5 berühren sich dabei an ihren jeweiligen Enden in Umfangsrichtung der Nabe 2 und kreuzen sich nicht. Dabei beginnt ein Steg 5 etwa auf Höhe einer der Kanten eines Lüfterblatts 3 und endet etwa an der anderen Kante des Lüfterblatts 3.Various webs 5 are attached to the flat, annular hub 2, which are flat and rectangular and lead from a fan blade 3 to the fan blade 6 immediately following. The webs 5 touch at their respective ends in the circumferential direction of the hub 2 and do not cross. A web 5 begins approximately at the level of one of the edges of a fan blade 3 and ends approximately at the other edge of the fan blade 3.

Die Figur 2 zeigt ein Lüfterrad 7, bei welchem an der flachen, ringförmigen Nabe ebenfalls rechteckig und eben ausgebildete Stege 8 zwischen den Lüfterblättern 3,9 angeordnet sind. In dieser Ausgestaltung der Figur 2 führen die einzelnen Stege 8 von je einer Kante eines Lüfterblatts 3 zu der entsprechenden Kante des übernächsten Lüfterblatts 9, wobei sich die Stege 8 untereinander zweifach kreuzen. So führt der Steg 8, der an der Vorderkante des Lüfterblatts 3 beginnt, in Drehrichtung zur Vorderkante des übernächsten Lüfterblatts 9.The Figure 2 shows a fan wheel 7, in which on the flat, annular hub also rectangular and flat webs 8 are arranged between the fan blades 3,9. In this embodiment the Figure 2 the individual webs 8 each lead from one edge of a fan blade 3 to the corresponding edge of the fan blade 9 but one, the webs 8 cross each other twice. Thus, the web 8, which begins at the front edge of the fan blade 3, leads in the direction of rotation to the front edge of the fan blade 9 after next.

Der an einem Lüfterblatt 3, 9 endende Steg 8 schließt dabei an den weiteren Steg 8 an, welcher von demselben Lüfterblatt 3, 9 ausgeht, wobei zwischen den beiden Stegen ein Winkel eingeschlossen wird. Durch diese Gestaltung, bei welcher von jedem Lüfterblatt 3 ein gerader Steg 8 zum übernächsten Lüfterblatt 9 führt, wird eine besonders stabile Struktur erreicht, welche die dynamische Festigkeit des Lüfterrades 7 gegen axiale Verschiebung und/oder Verkippen verhindert. Die Steifigkeit des Lüfterrades 7 wird somit erfindungsgemäß erhöht.The web 8 ending on a fan blade 3, 9 adjoins the further web 8, which starts from the same fan blade 3, 9, an angle being included between the two webs. This design, in which a straight web 8 leads from each fan blade 3 to the fan blade 9 next but one, results in a particularly stable structure which prevents the dynamic strength of the fan wheel 7 against axial displacement and / or tilting. The rigidity of the fan wheel 7 is thus increased according to the invention.

Bei dem Lüfterrad 10, welches in Figur 3 dargestellt ist, ist auf der flachen, ringförmigen Nabe 2 eine hochvernetzte Struktur der ebenen und rechteckig ausgebildeten Stege 11 zu erkennen, wobei sich jeweils ein Steg 11 von einem Lüfterblatt 3 zu dem drittnächsten Lüfterblatt 12 erstreckt. Dabei startet ein Steg an einer Vorderkante eines Lüfterblatts 3 und endet an der Vorderkante des drittnächsten Lüfterblatts 12. Dabei überkreuzen sich die Stege 11 entlang der Erstreckung eines Stegs 11 4-mal, wobei die sich kreuzenden Stege 11 dabei eine symmetrische Struktur bilden. Mittels einer solchen dargestellten komplexen Struktur werden die Stege 11 relativ nah an das Zentrum, also an die Drehachse, des Lüfterrades 10 herangeführt und gewährleisten diesem eine ausreichende Steifigkeit.In the fan wheel 10, which in Figure 3 is shown, a highly networked structure of the flat and rectangular webs 11 can be seen on the flat, annular hub 2, with one web 11 extending from one fan blade 3 to the third next fan blade 12. In this case, a web starts at a front edge of a fan blade 3 and ends at the front edge of the third next fan blade 12. The webs 11 cross each other four times along the extension of a web 11, the webs 11 crossing one another thereby forming a symmetrical structure. By means of such a complex structure shown, the webs 11 are brought relatively close to the center, that is to the axis of rotation, of the fan wheel 10 and ensure this a sufficient rigidity.

Die Figur 4 zeigt ein weiteres Ausführungsbeispiel des Lüfterrades 13, bei welchem die ebenen und rechteckigen Stege 13 besonders nah an den Befestigungspunkten 4 der Viscokupplung verlaufen. Das Lüfterrad 13 umfasst elf Lüfterblätter 3, welche mittels sechs, sich nicht untereinander schneidenden geraden Stegen 14 stabilisiert sind. Dabei erstrecken sich drei Stege entlang des halben Umfangs der Nabe 2. Vorteilhafterweise lässt sich eine solche Ausbildung mit einem klassischen Rippenprinzip der Nabe 2 kombinieren.The Figure 4 shows a further embodiment of the fan wheel 13, in which the flat and rectangular webs 13 run particularly close to the attachment points 4 of the viscous coupling. The fan wheel 13 comprises eleven fan blades 3, which are stabilized by means of six straight webs 14 which do not intersect with one another. Here, three webs extend along the half the circumference of the hub 2. Advantageously, such a design can be combined with a classic rib principle of the hub 2.

Nabenrampen können vorgesehen sein oder es kann bei den beschriebenen Lösungen optional gegebenenfalls auch darauf verzichtet werden.Hub ramps can be provided, or optionally can also be dispensed with in the solutions described.

Die erfindungsgemäßen Gestaltungen können insbesondere auch bei Gestaltungen gemäß der DE 10 2010 042 325 A1 verwendet werden.The designs according to the invention can in particular also be used for designs according to the DE 10 2010 042 325 A1 be used.

Claims (7)

  1. A fan wheel, in particular for propelling cooling air for an internal combustion engine, comprising a flat, ring-shaped hub (2) on which a plurality of fan blades (3, 6, 9, 12) is arranged and wherein the hub (2) has a rib structure, wherein the rib structure is formed peripherally and consists of rectangular and flatly formed ribs (5, 8, 11, 14) having an edge region and sitting with the edge region thereof on the hub (2), characterised in that the ribs are oriented substantially tangentially to the circumferential direction of the hub (2) in their longitudinal extent, wherein they are in contact with one another.
  2. The fan wheel according to claim 1, characterised in that each flatly formed rib (5, 8, 11, 14) runs from one fan blade (3, 6, 9, 12) to another fan blade (3, 6, 9, 12).
  3. The fan wheel according to claim 2, characterised in that the flatly formed rib (5) runs from one fan blade (3) to the directly adjacent fan blade (6).
  4. The fan wheel according to claim 2, characterised in that the flatly formed rib (8) runs from one fan blade (3) to the next but one fan blade (9).
  5. The fan wheel according to claim 2, characterised in that the flatly formed rib (11) runs from one fan blade (3) to the third next fan blade (12).
  6. The fan wheel according to at least one of the preceding claims, characterised in that the straight ribs (14) run close to screw points (4) for the fixation of a coupling of the fan, without crossing one another.
  7. A visco fan for propelling cooling air for an internal combustion engine, comprising a fan wheel, which is connected to a shaft of the internal combustion engine via a visco coupling, characterised in that the fan wheel (1, 7, 10, 13) is formed according to at least one of the preceding claims.
EP15759482.1A 2014-09-22 2015-09-09 Fan wheel Active EP3198150B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014219046.0A DE102014219046A1 (en) 2014-09-22 2014-09-22 fan
PCT/EP2015/070629 WO2016045971A1 (en) 2014-09-22 2015-09-09 Fan wheel

Publications (2)

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EP3198150A1 EP3198150A1 (en) 2017-08-02
EP3198150B1 true EP3198150B1 (en) 2020-03-18

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EP15759482.1A Active EP3198150B1 (en) 2014-09-22 2015-09-09 Fan wheel

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US (1) US10393136B2 (en)
EP (1) EP3198150B1 (en)
JP (1) JP6654627B2 (en)
CN (1) CN106715917B (en)
DE (1) DE102014219046A1 (en)
WO (1) WO2016045971A1 (en)

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Also Published As

Publication number Publication date
US20170175762A1 (en) 2017-06-22
JP6654627B2 (en) 2020-02-26
JP2017530289A (en) 2017-10-12
CN106715917B (en) 2019-06-04
EP3198150A1 (en) 2017-08-02
US10393136B2 (en) 2019-08-27
DE102014219046A1 (en) 2016-03-24
CN106715917A (en) 2017-05-24
WO2016045971A1 (en) 2016-03-31

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