EP2771581B1 - Axial ventilator wheel - Google Patents

Axial ventilator wheel Download PDF

Info

Publication number
EP2771581B1
EP2771581B1 EP11773290.9A EP11773290A EP2771581B1 EP 2771581 B1 EP2771581 B1 EP 2771581B1 EP 11773290 A EP11773290 A EP 11773290A EP 2771581 B1 EP2771581 B1 EP 2771581B1
Authority
EP
European Patent Office
Prior art keywords
hub
ventilator
axial
wheel
blade
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.)
Active
Application number
EP11773290.9A
Other languages
German (de)
French (fr)
Other versions
EP2771581A1 (en
Inventor
Oliver Haaf
Erhard Gruber
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.)
Ebm Papst Mulfingen GmbH and Co KG
Original Assignee
Ebm Papst Mulfingen GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ebm Papst Mulfingen GmbH and Co KG filed Critical Ebm Papst Mulfingen GmbH and Co KG
Publication of EP2771581A1 publication Critical patent/EP2771581A1/en
Application granted granted Critical
Publication of EP2771581B1 publication Critical patent/EP2771581B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F04D25/082—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provision for cooling the motor
    • 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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system

Definitions

  • the present invention relates to an axial fan wheel having a wheel body consisting of a tubular, hollow cylindrical hub and a plurality of circumferentially spaced fan blades connected to the outer peripheral surface of the hub, each fan blade being in the region of one with the hub connected blade root extends axially and circumferentially obliquely between an inflow side and an outflow side of the hub.
  • Such an axial fan impeller is in the document EP 1 609 996 A1 / B1 described.
  • This impeller can be pressed with its hub for attachment to a rotating part, in particular to a rotor of an electric motor.
  • a substantially cylindrical or annular Ronde is arranged within the hub.
  • the present invention is therefore based on the object to improve a Axialventilatorrad of the described generic type with respect to its main flow and its air performance.
  • the hub is shortened on its inflow side in the circumferential direction in each case between the blade roots of the adjacent fan blades via peripheral recesses with respect to their axial hub length.
  • Concentrically curved hub rim sections with continuous, edge-free transitions to the circumferentially adjacent edge sections are preferably formed by the recesses of the hub between the blade roots.
  • the recesses formed on the inflow side edge of the hub according to the invention are suitably designed so that during operation, upon rotation of the Axialventilatorrades by eliminating or minimizing disturbing edge portions of the conveyed air carrying a fan and rotating driving electric motor and the hub itself with minimal interference Vortex and the like can flow around in the area between the fan blades.
  • the recesses according to the invention it is possible to achieve a fan wheel throughflow optimized in particular with regard to the air flow.
  • An inventive Axialventilatorrad 1 consists of a wheel body 2, which in turn consists of a tubular, hollow cylindrical hub 4 and a plurality of circumferentially arranged, connected to the outer peripheral surface of the hub 4 and starting from the hub 4 radially or obliquely inclined outwardly extending fan blades. 6 consists.
  • the term "obliquely inclined” also includes a blade curvature as exemplified in the drawings.
  • the Blades 6 are inclined or curved in particular in the direction of rotation, but may also be inclined backwards or curved. In the illustrated embodiment, the fan wheel 1 on seven fan blades 6.
  • the fan blades 6 may be uniformly spaced at equal angular intervals or for purposes of "natural balance" - unevenly spaced at unequal angular intervals.
  • Each fan blade 6 extends axially and circumferentially obliquely in the region of a blade root 8 connected to the hub 4, in particular with a specific curvature, between an inflow side 10 and an outflow side 12 of the hub 4 or the fan wheel 1.
  • the term "oblique” therefore closes here also a certain curvature, see, for. B. Fig. 3 ,
  • inclination or curvature of the fan blades 6 is in rotation in Fig. 2 and 5 each illustrated by arrows 14 air flow as the main flow from the inflow side 10 to the outflow 12 causes.
  • the inflow side 10 is also referred to as the suction side and the outflow side 12 as the pressure side.
  • edge edge portions 18 are formed between the respective adjacent blade roots, which preferably extend concavely curved.
  • the concavely curved hub rim sections 18 merge with continuous, edge-and-corner-free transitions into the edge sections of the hub 4 bordering each in the circumferential direction.
  • an improvement in the flow characteristics is achieved by the recesses 16 formed on the inflow-side edge of the hub to the effect that during operation of the Axialventilatorrades 1, by Eliminating or at least minimizing disturbing hub edge regions located in the flow region of the main flow, the conveyed air can flow around the hub 4 in the region between the fan blades 6 with minimal interference from eddies and the like.
  • an optimized ventilator wheel flow can consequently be achieved. This has a positive influence on the air performance.
  • the Axialventilatorrad 1 is mounted on a rotating part.
  • an annular disc 20 is fixed, with the wheel body 2 on the rotating part, according to 4 to 6
  • an external rotor rotor 22 of an electric motor 24 is frictionally aufpressbar.
  • the hub 4 is spaced coaxially with the rotor 22 in the radial direction over the Ronde 20.
  • the circular blank 20 is seated in the circumferential annular gap formed thereby between the rotor 22 and the hub 4.
  • the circular blank 20 is arranged in its ring cross section distributed over the circumference, in particular in the axial or axially parallel direction for a flow of cooling air.
  • the openings 26 form cooling channels which connect two annular gap regions formed axially on both sides of the round plate 20 and radially between the hub 4 and the rotor 22 in such a way that the rotor 22 rotates from the pressure side, that is the outflow side 12 Suction side, which is the inflow side 10, flows around the cooling air and thereby the motor 24 is cooled effectively.
  • the openings 26 also allow drainage of condensables that may form in certain applications and under certain operating conditions.
  • the wheel body 2 is formed with the hub 4 and the fan blades 6 in particular made of plastic as a one-piece molding.
  • the blank 20 is at least partially made of metal, for example of a metal-coated with plastic sheet metal.
  • the circular blank 20 on its inner circumference in the circumferential direction alternately arranged first and second surface portions, wherein the first surface portions define a first, larger inner diameter and the second surface portions define a second, smaller inner diameter.
  • the smaller inner diameter of the second surface portions is designed such that in this area when pressing the frictional mounting on the rotor 22 is effected. Accordingly, it is a segmented Ronde, wherein the inner peripheral surface is divided into said sections with different inner diameters.
  • the smaller diameter portions are widened during the pressing operation, while the larger diameter portions do not or only insignificantly change their radial position during the pressing operation, but advantageously bring about a reduction in the mean level of the mechanical tension values.
  • the blank 20 can be molded directly into the material during the injection process of the wheel body 2 cohesively and optionally additionally encapsulated in plastic.

Landscapes

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

Description

Die vorliegende Erfindung betrifft gemäß dem Oberbegriff des Anspruchs 1 ein Axialventilatorrad mit einem Radkörper, der aus einer rohrartigen, hohlzylindrischen Nabe und mehreren über den Umfang verteilt angeordneten, mit der äußeren Umfangsfläche der Nabe verbundenen Ventilatorschaufeln besteht, wobei jede Ventilatorschaufel im Bereich eines mit der Nabe verbundenen Schaufelfußes axial und in Umfangsrichtung schräg zwischen einer Einströmseite und einer Ausströmseite der Nabe verläuft.The present invention, according to the preamble of claim 1, relates to an axial fan wheel having a wheel body consisting of a tubular, hollow cylindrical hub and a plurality of circumferentially spaced fan blades connected to the outer peripheral surface of the hub, each fan blade being in the region of one with the hub connected blade root extends axially and circumferentially obliquely between an inflow side and an outflow side of the hub.

Ein derartiges Axialventilator-Laufrad ist in dem Dokument EP 1 609 996 A1/B1 beschrieben. Dieses Laufrad ist mit seiner Nabe zur Befestigung auf ein rotierendes Teil, insbesondere auf einen Rotor eines Elektromotors, aufpressbar. Dazu ist innerhalb der Nabe eine im Wesentlichen zylindrische bzw. ringförmige Ronde angeordnet.Such an axial fan impeller is in the document EP 1 609 996 A1 / B1 described. This impeller can be pressed with its hub for attachment to a rotating part, in particular to a rotor of an electric motor. For this purpose, a substantially cylindrical or annular Ronde is arranged within the hub.

Das bekannte Axialventilator-Laufrad hat sich in der Praxis bisher gut bewährt, weil es insbesondere eine einfache Montage und eine sichere Halterung auf dem Rotor ermöglicht. Außerdem kann durch axiale Öffnungen der Ronde eine KühlluftDurchströmung ermöglicht werden. Allerdings hat sich gezeigt, dass hinsichtlich der eigentlichen Förder-Durchströmung, d. h. der Hauptströmung des Axialventilators, die Strömungseigenschaften noch verbesserungswürdig sind.The known axial fan impeller has been well proven in practice so far, because it allows in particular a simple installation and secure mounting on the rotor. In addition, through axial openings of the Ronde a cooling air flow can be made possible. However, it has been shown that with regard to the actual delivery flow, d. H. the main flow of the axial fan, the flow characteristics are still in need of improvement.

Der vorliegenden Erfindung liegt daher die Aufgabe zu Grunde, ein Axialventilatorrad der beschriebenen, gattungsgemäßen Art hinsichtlich seiner Hauptströmung und seiner Luftleistung zu verbessern.The present invention is therefore based on the object to improve a Axialventilatorrad of the described generic type with respect to its main flow and its air performance.

Erfindungsgemäß wird dies durch die Merkmale des unabhängigen Anspruchs 1 erreicht. Vorteilhafte Ausgestaltungen der Erfindung sind in den abhängigen Ansprüchen sowie in der anschließenden Beschreibung enthalten.This is achieved by the features of independent claim 1 according to the invention. Advantageous embodiments of the invention are contained in the dependent claims and in the subsequent description.

Erfindungsgemäß ist demnach die Nabe auf ihrer Einströmseite in Umfangsrichtung jeweils zwischen den Schaufelfüßen der benachbarten Ventilatorschaufeln über randliche Ausnehmungen bezüglich ihrer axialen Nabenlänge verkürzt. Bevorzugt sind durch die Ausnehmungen der Nabe zwischen den Schaufelfüßen konkav gekrümmte Nabenrandabschnitte mit stetigen, kantenfreien Übergängen zu den in Umfangsrichtung angrenzenden Randabschnitten gebildet. Hierdurch werden vorteilhafterweise Schwachstellen, Kerbwirkungen und dergleichen vermieden.According to the invention, therefore, the hub is shortened on its inflow side in the circumferential direction in each case between the blade roots of the adjacent fan blades via peripheral recesses with respect to their axial hub length. Concentrically curved hub rim sections with continuous, edge-free transitions to the circumferentially adjacent edge sections are preferably formed by the recesses of the hub between the blade roots. As a result, weak points, notch effects and the like are advantageously avoided.

Die am einströmseitigen Rand der Nabe gebildeten, erfindungsgemäßen Ausnehmungen sind zweckmäßig so gestaltet, dass im Betrieb, bei Rotation des Axialventilatorrades durch Beseitigung oder Minimierung von störenden Kantenbereichen die geförderte Luft einen das Ventilatorrad tragenden und rotierend antreibenden Elektromotor und auch die Nabe selbst mit minimalen Beeinträchtigungen durch Wirbel und dergleichen im Bereich zwischen den Ventilatorschaufeln umströmen kann. Durch die erfindungsgemäßen Ausnehmungen kann folglich eine insbesondere hinsichtlich der Luftleistung optimierte Ventilatorrad-Durchströmung erreicht werden.The recesses formed on the inflow side edge of the hub according to the invention are suitably designed so that during operation, upon rotation of the Axialventilatorrades by eliminating or minimizing disturbing edge portions of the conveyed air carrying a fan and rotating driving electric motor and the hub itself with minimal interference Vortex and the like can flow around in the area between the fan blades. As a result of the recesses according to the invention, it is possible to achieve a fan wheel throughflow optimized in particular with regard to the air flow.

Anhand eines bevorzugten, in der Zeichnung veranschaulichten Ausführungsbeispiels soll die Erfindung im Folgenden genauer erläutert werden. Es zeigen:

Fig. 1
eine axiale Draufsicht auf die vordere Einströmseite eines erfindungsgemäßen Axialventilatorrades (Ansicht in Pfeilrichtung I gemäß Fig. 2),
Fig. 2
eine Seitenansicht in Pfeilrichtung II gemäß Fig. 1,
Fig. 3
eine Perspektivansicht des Axialventilatorrades gemäß Fig. 1 und 2 schräg von hinten in Richtung auf die Ausströmseite,
Fig. 4
eine Perspektivansicht analog zu Fig. 3, jedoch im montierten, auf einen Elektromotor aufgepressten Zustand des erfindungsgemäßen Axialventilatorrades,
Fig. 5
eine Seitenansicht ähnlich Fig. 2 im montierten Zustand nach Fig. 4 und
Fig. 6
eine Perspektivansicht zu Fig. 4 und 5 schräg von vorn in Richtung auf die Einströmseite.
With reference to a preferred, illustrated in the drawing embodiment, the invention will be explained in more detail below. Show it:
Fig. 1
an axial plan view of the front inflow side of a Axialventilatorrades invention (view in the direction of arrow I according to Fig. 2 )
Fig. 2
a side view in the direction of arrow II according to Fig. 1 .
Fig. 3
a perspective view of the Axialventilatorrades according to Fig. 1 and 2 obliquely from the rear towards the outflow side,
Fig. 4
a perspective view analogous to Fig. 3 , but in the mounted, pressed onto an electric motor state of the axial fan wheel according to the invention,
Fig. 5
a side view similar Fig. 2 in the assembled state after Fig. 4 and
Fig. 6
a perspective view too 4 and 5 obliquely from the front in the direction of the inflow side.

In den verschiedenen Figuren der Zeichnung sind gleiche Teile stets mit den gleichen Bezugszeichen versehen.In the various figures of the drawing, like parts are always provided with the same reference numerals.

Ein erfindungsgemäßes Axialventilatorrad 1 besteht aus einem Radkörper 2, der seinerseits aus einer rohrartigen, hohlzylindrischen Nabe 4 und mehreren über den Umfang verteilt angeordneten, mit der äußeren Umfangsfläche der Nabe 4 verbundenen und ausgehend von der Nabe 4 radial oder schräg geneigt nach außen verlaufenden Ventilatorschaufeln 6 besteht. Der Begriff "schräg geneigt" schließt auch eine Schaufelkrümmung ein, wie sie beispielhaft in den Zeichnungen dargestellt ist. Die Schaufeln 6 sind insbesondere in Drehrichtung vorwärts geneigt oder gekrümmt, können aber auch rückwärts geneigt oder gekrümmt sein. Im dargestellten Ausführungsbeispiel weist das Ventilatorrad 1 sieben Ventilatorschaufeln 6 auf. Die Ventilatorschaufeln 6 können gleichmäßig mit jeweils gleichen Winkelabständen oderzum Zwecke einer "natürlichen Auswuchtung" - ungleichmäßig mit ungleichen Winkelabständen über den Umfang verteilt angeordnet sein. Jede Ventilatorschaufel 6 verläuft im Bereich eines mit der Nabe 4 verbundenen Schaufelfußes 8 axial und in Umfangsrichtung schräg, insbesondere mit einer bestimmten Krümmung, zwischen einer Einströmseite 10 und einer Ausströmseite 12 der Nabe 4 bzw. des Ventilatorrades 1. Der Begriff "schräg" schließt demnach auch hier einen bestimmten Krümmungsverlauf ein, siehe z. B. Fig. 3. Durch diese Neigung, Schrägstellung oder Krümmung der Ventilatorschaufeln 6 wird bei Rotation eine in Fig. 2 und 5 jeweils durch Pfeile 14 veranschaulichte Luft-Durchströmung als Hauptströmung von der Einströmseite 10 zur Ausströmseite 12 bewirkt. Die Einströmseite 10 wird auch als Saugseite bezeichnet und die Ausströmseite 12 als Druckseite.An inventive Axialventilatorrad 1 consists of a wheel body 2, which in turn consists of a tubular, hollow cylindrical hub 4 and a plurality of circumferentially arranged, connected to the outer peripheral surface of the hub 4 and starting from the hub 4 radially or obliquely inclined outwardly extending fan blades. 6 consists. The term "obliquely inclined" also includes a blade curvature as exemplified in the drawings. The Blades 6 are inclined or curved in particular in the direction of rotation, but may also be inclined backwards or curved. In the illustrated embodiment, the fan wheel 1 on seven fan blades 6. The fan blades 6 may be uniformly spaced at equal angular intervals or for purposes of "natural balance" - unevenly spaced at unequal angular intervals. Each fan blade 6 extends axially and circumferentially obliquely in the region of a blade root 8 connected to the hub 4, in particular with a specific curvature, between an inflow side 10 and an outflow side 12 of the hub 4 or the fan wheel 1. The term "oblique" therefore closes here also a certain curvature, see, for. B. Fig. 3 , By this inclination, inclination or curvature of the fan blades 6 is in rotation in Fig. 2 and 5 each illustrated by arrows 14 air flow as the main flow from the inflow side 10 to the outflow 12 causes. The inflow side 10 is also referred to as the suction side and the outflow side 12 as the pressure side.

Erfindungsgemäß ist nun die Nabe 4 auf der Einströmseite 10 in Umfangsrichtung jeweils zwischen den Schaufelfüßen 8 der jeweils benachbarten Ventilatorschaufeln 6 über randliche Ausnehmungen 16 bereichsweise bezüglich ihrer axial bzw. achsparallel gemessenen Nabenlänge verkürzt ausgebildet. Durch diese Ausnehmungen 16 im einströmseitigen Randbereich der Nabe 4 sind zwischen den jeweils benachbarten Schaufelfüßen 8 Nabenrandabschnitte 18 gebildet, die vorzugsweise konkav gekrümmt verlaufen. Hierbei ist es weiterhin vorteilhaft, wenn die konkav gekrümmten Nabenrandabschnitte 18 mit stetigen, kanten- und eckenfreien Übergängen in die jeweils in Umfangsrichtung angrenzenden Randabschnitte der Nabe 4 übergehen. Hierdurch werden vorteilhafterweise mechanische Schwachstellen, Kerbwirkungen und dergleichen vermieden.According to the invention, the hub 4 on the inflow side 10 in the circumferential direction in each case between the blade roots 8 of the respective adjacent fan blades 6 via marginal recesses 16 partially formed shortened with respect to their axially or axially measured hub length. Through these recesses 16 in the inflow-side edge region of the hub 4 8 edge edge portions 18 are formed between the respective adjacent blade roots, which preferably extend concavely curved. In this case, it is furthermore advantageous if the concavely curved hub rim sections 18 merge with continuous, edge-and-corner-free transitions into the edge sections of the hub 4 bordering each in the circumferential direction. As a result, mechanical weaknesses, notch effects and the like are advantageously avoided.

Wie weiter oben bereits erläutert wurde, wird durch die am einströmseitigen Rand der Nabe 4 gebildeten Ausnehmungen 16 eine Verbesserung der Strömungseigenschaften dahingehend erreicht, dass im Betrieb, bei Rotation des Axialventilatorrades 1, durch Beseitigung oder zumindest Minimierung von störenden, im Strömungsbereich der Hauptströmung liegenden Naben-Kantenbereichen die geförderte Luft die Nabe 4 mit einer minimalen Beeinträchtigung durch Wirbel und dergleichen im Bereich zwischen den Ventilatorschaufeln 6 umströmen kann. Durch die erfindungsgemäßen Ausnehmungen 16 kann folglich eine optimierte Ventilatorrad-Durchströmung erreicht werden. Dies hat einen positiven Einfluss auf die Luftleistung.As has already been explained above, an improvement in the flow characteristics is achieved by the recesses 16 formed on the inflow-side edge of the hub to the effect that during operation of the Axialventilatorrades 1, by Eliminating or at least minimizing disturbing hub edge regions located in the flow region of the main flow, the conveyed air can flow around the hub 4 in the region between the fan blades 6 with minimal interference from eddies and the like. As a result of the recesses 16 according to the invention, an optimized ventilator wheel flow can consequently be achieved. This has a positive influence on the air performance.

Zum rotierenden Antrieb wird das Axialventilatorrad 1 auf einem rotierenden Teil befestigt. Dazu ist in bevorzugter Ausgestaltung vorgesehen, dass innerhalb der Nabe 4 des Radkörpers 2 eine ringförmige Ronde 20 befestigt ist, mit der der Radkörper 2 auf das rotierende Teil, gemäß Fig. 4 bis 6 insbesondere auf eine zylindrische Außenumfangsfläche eines Außenläufer-Rotors 22 eines Elektromotors 24, kraftschlüssig aufpressbar ist. Wie sich insbesondere aus Fig. 4 und 6 ergibt, ist wegen dieser Befestigungsart die Nabe 4 koaxial zu dem Rotor 22 in radialer Richtung über die Ronde 20 beabstandet. Die Ronde 20 sitzt in dem dadurch gebildeten umfangsgemäßen Ringspalt zwischen dem Rotor 22 und der Nabe 4. Hierbei ist in weiterer bevorzugter Ausgestaltung vorgesehen, dass die Ronde 20 in ihrem Ringquerschnitt über den Umfang verteilt angeordnete, in axialer bzw. achsparalleler Richtung durchgehende Öffnungen 26 insbesondere für eine Durchströmung mit Kühlluft aufweist. Somit bilden die Öffnungen 26 Kühlkanäle, die zwei axial beidseitig der Ronde 20 und jeweils radial zwischen der Nabe 4 und dem Rotor 22 gebildete Ringspalt-Bereiche miteinander so verbinden, dass der Rotor 22 bei Rotation von der Druckseite, das ist die Ausströmseite 12, zur Saugseite, das ist die Einströmseite 10, mit der Kühlluft umströmt und dadurch der Motor 24 effektiv gekühlt wird. Außerdem erlauben die Öffnungen 26 auch ein Ablaufen von Kondensflüssigkeiten, die sich bei bestimmten Anwendungen und unter bestimmten Betriebsbedingungen bilden können.For rotating drive the Axialventilatorrad 1 is mounted on a rotating part. For this purpose, it is provided in a preferred embodiment that within the hub 4 of the wheel body 2, an annular disc 20 is fixed, with the wheel body 2 on the rotating part, according to 4 to 6 In particular, on a cylindrical outer peripheral surface of an external rotor rotor 22 of an electric motor 24, is frictionally aufpressbar. As can be seen in particular 4 and 6 shows, because of this type of attachment, the hub 4 is spaced coaxially with the rotor 22 in the radial direction over the Ronde 20. The circular blank 20 is seated in the circumferential annular gap formed thereby between the rotor 22 and the hub 4. Here, in another preferred embodiment, the circular blank 20 is arranged in its ring cross section distributed over the circumference, in particular in the axial or axially parallel direction for a flow of cooling air. Thus, the openings 26 form cooling channels which connect two annular gap regions formed axially on both sides of the round plate 20 and radially between the hub 4 and the rotor 22 in such a way that the rotor 22 rotates from the pressure side, that is the outflow side 12 Suction side, which is the inflow side 10, flows around the cooling air and thereby the motor 24 is cooled effectively. In addition, the openings 26 also allow drainage of condensables that may form in certain applications and under certain operating conditions.

In weiter bevorzugter Ausgestaltung ist der Radkörper 2 mit der Nabe 4 und den Ventilatorschaufeln 6 insbesondere aus Kunststoff als einstückiges Formteil ausgebildet. Die Ronde 20 besteht zumindest anteilig aus Metall, beispielsweise aus einem mit Kunststoff umspritzten Metallblech.In a further preferred embodiment, the wheel body 2 is formed with the hub 4 and the fan blades 6 in particular made of plastic as a one-piece molding. The blank 20 is at least partially made of metal, for example of a metal-coated with plastic sheet metal.

In einer in der Zeichnung nicht erkennbaren Ausgestaltung kann - im Sinne der eingangs genannten EP 1 609 996 A1/B1 - vorgesehen sein, dass die Ronde 20 auf ihrem inneren Umfang in Umfangsrichtung alternierend angeordnete erste und zweite Flächenabschnitte aufweist, wobei die ersten Flächenabschnitte einen ersten, größeren Innendurchmesser und die zweiten Flächenabschnitte einen zweiten, kleineren Innendurchmesser definieren. Der kleinere Innendurchmesser der zweiten Flächenabschnitte ist derart ausgelegt, dass in diesem Bereich beim Aufpressen die kraftschlüssige Halterung auf dem Rotor 22 bewirkt wird. Demnach handelt es sich um eine segmentierte Ronde, wobei die Innenumfangsfläche in die genannten Abschnitte mit unterschiedlichen Innendurchmessern unterteilt ist. Die Abschnitte mit dem kleineren Durchmesser werden beim Aufpressvorgang aufgeweitet, während die Abschnitte mit dem größeren Durchmesser ihre radiale Position beim Aufpressvorgang nicht oder nur unwesentlich verändern, jedoch vorteilhafterweise eine Senkung des mittleren Niveaus der mechanischen Spannungswerte bewirken. Beim Aufpressen wird vermieden, dass eine auftretende Verformung der Ronde an die Nabe weitergeleitet werden könnte.In an embodiment not recognizable in the drawing can - in the sense of the aforementioned EP 1 609 996 A1 / B1 - Be provided that the circular blank 20 on its inner circumference in the circumferential direction alternately arranged first and second surface portions, wherein the first surface portions define a first, larger inner diameter and the second surface portions define a second, smaller inner diameter. The smaller inner diameter of the second surface portions is designed such that in this area when pressing the frictional mounting on the rotor 22 is effected. Accordingly, it is a segmented Ronde, wherein the inner peripheral surface is divided into said sections with different inner diameters. The smaller diameter portions are widened during the pressing operation, while the larger diameter portions do not or only insignificantly change their radial position during the pressing operation, but advantageously bring about a reduction in the mean level of the mechanical tension values. When pressing is avoided that an occurring deformation of the blank could be forwarded to the hub.

Die Ronde 20 kann beim Spritzvorgang des Radkörpers 2 unmittelbar stoffschlüssig in das Material eingeformt und gegebenenfalls zusätzlich mit Kunststoff umspritzt werden.The blank 20 can be molded directly into the material during the injection process of the wheel body 2 cohesively and optionally additionally encapsulated in plastic.

Durch die Erfindung wird eine deutliche Verbesserung der Luftleistung des Axialventilatorrades 1 erreicht. Die größten Effekte ergeben sich bei kurzen Motor-Baugrößen, d. h. bei geringer axialer Länge. Auch für Einsatzfälle ohne die Kühlströmung (Rotor-Rückströmung) ergibt sich durch die gewählte Naben-Geometrie ein deutlicher Vorteil, weil die Hauptströmung im Nabenbereich durch Vermeidung bzw. Beseitigung von Störstellen deutlich geringere Wirbelbildungen an der Nabe verursacht.By the invention, a significant improvement in the air performance of the Axialventilatorrades 1 is achieved. The biggest effects occur with short motor sizes, ie. H. at low axial length. Also, for applications without the cooling flow (rotor backflow) results from the selected hub geometry a significant advantage, because the main flow in the hub area caused by avoidance or elimination of impurities significantly lower vortices on the hub.

Die Erfindung ist nicht auf die dargestellten und beschriebenen Ausführungsbeispiele beschränkt, sondern umfasst auch alle im Sinne der Erfindung gleichwirkenden Ausführungen, die durch die nachfolgende Ansprüche definiert werden.The invention is not limited to the illustrated and described embodiments, but also includes all the same in the context of the invention Embodiments defined by the following claims.

Claims (4)

  1. An axial ventilator wheel (1) comprising a wheel body (2) consisting of a hollow cylindrical hub (4) and a plurality of ventilator blades (6), which are arranged so as to be distributed around the circumference and connected to the hub (4), wherein each ventilator blade (6) extends axially and inclined in the circumferential direction between an inflow side (10) and an outflow side (12) of the hub (4) in the area of a blade base (8), which is connected to the hub (4), wherein a ring-shaped round blank (20), by means of which the wheel body (2) can be pressed onto a rotating part, in particular an external rotor (22) of an electric motor (24), is fastened inside the hub (4), and wherein, in its ring cross-section, the round blank (20) has axially continuous openings (26), which are arranged so as to be distributed around the circumference, in particular for a flow-through with cooling air,
    characterized in that the hub (4) is shortened with respect to the axial hub length thereof at its inflow side (10) in the circumferential direction, in each case between the blade bases (8) of the adjacent ventilator blades (6) by means of recesses (16) around the edges.
  2. The axial ventilator wheel according to claim 1,
    characterized in
    that concavely curved hub edge sections (18) are formed by means of the recesses (16) of the hub (4) between the blade bases (8).
  3. The axial ventilator wheel according to any one of claims 1 to 2,
    characterized in
    that the wheel body (2) is made as integral molding with the hub (4) and the ventilator blades (6), in particular of plastic.
  4. The axial ventilator wheel according to any one of the claims,
    characterized in
    that the round blank (20) consists at least partly of metal.
EP11773290.9A 2011-10-25 2011-10-25 Axial ventilator wheel Active EP2771581B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2011/068630 WO2013060358A1 (en) 2011-10-25 2011-10-25 Axial ventilator wheel

Publications (2)

Publication Number Publication Date
EP2771581A1 EP2771581A1 (en) 2014-09-03
EP2771581B1 true EP2771581B1 (en) 2018-12-26

Family

ID=45688098

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11773290.9A Active EP2771581B1 (en) 2011-10-25 2011-10-25 Axial ventilator wheel

Country Status (2)

Country Link
EP (1) EP2771581B1 (en)
WO (1) WO2013060358A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018017167A (en) * 2016-07-27 2018-02-01 日本電産株式会社 Impeller and motor
US11555508B2 (en) 2019-12-10 2023-01-17 Regal Beloit America, Inc. Fan shroud for an electric motor assembly
USD952830S1 (en) 2019-12-10 2022-05-24 Regal Beloit America, Inc. Fan shroud
US11859634B2 (en) 2019-12-10 2024-01-02 Regal Beloit America, Inc. Fan hub configuration for an electric motor assembly
USD938009S1 (en) 2019-12-10 2021-12-07 Regal Beloit America, Inc. Fan hub
USD938010S1 (en) 2019-12-10 2021-12-07 Regal Beloit America, Inc. Fan hub
USD938011S1 (en) 2019-12-10 2021-12-07 Regal Beloit America, Inc. Fan blade
US11371517B2 (en) 2019-12-10 2022-06-28 Regal Beloit America, Inc. Hub inlet surface for an electric motor assembly

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2269274T3 (en) * 2001-01-02 2007-04-01 BEHR GMBH & CO. KG FAN WITH AXIAL BLADES.
ITBO20010485A1 (en) * 2001-07-27 2003-01-27 Spal Srl VENTILATION UNIT
US20030138324A1 (en) * 2002-01-24 2003-07-24 Hsieh Hsin-Mao Cooling fan
DE202004005548U1 (en) * 2003-04-19 2004-06-17 Ebm-Papst St. Georgen Gmbh & Co. Kg Fan
DE202004010088U1 (en) 2004-06-25 2004-09-09 Ebm-Papst Mulfingen Gmbh & Co. Kg Impeller, in particular for an axial fan
TWI370876B (en) * 2006-01-23 2012-08-21 Delta Electronics Inc Fan and impeller thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
WO2013060358A1 (en) 2013-05-02
EP2771581A1 (en) 2014-09-03

Similar Documents

Publication Publication Date Title
EP2771581B1 (en) Axial ventilator wheel
EP2196679B1 (en) Impeller for a radial fan
DE19929978B4 (en) Fan with axial blades
EP2802780B1 (en) Axial or diagonal fan with trip edge on the blade suction side
EP2549116A1 (en) Axial ventilator with additional flow channel
EP2418389A2 (en) Impeller for a ventilator
DE102010017733B4 (en) Tesla turbine and method for converting fluid flow energy into kinetic energy of a shaft of a Tesla turbine
DE102011013040A1 (en) Centrifugal multi-blade fan
DE102018115000A1 (en) FAN SYSTEM WITH INTEGRATED FAN COIL CHANNEL FOR REDUCED FLOW RATE
DE112009000367T5 (en) Cooling fan with partial ring
DE102012110643A1 (en) axial fan
DE102011013841A1 (en) Wheel of radial fan for air conditioner in motor vehicle, has inclined blades whose leading edges are extended in direction of support disc with radial direction component and circumferential direction component
EP2994614A1 (en) Rotor for a thermal turbomachine
EP3916239A1 (en) Fan wheel with three-dimensionally curved impeller blades
EP2994615B1 (en) Rotor for a thermal turbomachine
DE102009028125A1 (en) Entry geometry for semi-axial fan wheels
DE3152556C2 (en) Axial blower
EP0515839B1 (en) Rotor for a mixed flow fan
EP2314882B1 (en) Air guiding element for an axial ventilator
EP3617529B1 (en) Fan frame of a motor vehicle
EP2225467B1 (en) Swirl-generating apparatus and turbocharger with such a swirl-generating apparatus
EP3273066B1 (en) Blower wheel
DE10111292A1 (en) Fan arrangement for an electrical machine
DE9305528U1 (en) Spiral blower
DE3149091A1 (en) Radial fan impeller

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20140324

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20180802

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1081811

Country of ref document: AT

Kind code of ref document: T

Effective date: 20190115

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502011015212

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181226

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190326

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181226

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181226

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181226

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190326

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20181226

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190327

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181226

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181226

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181226

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181226

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190426

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181226

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181226

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181226

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181226

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181226

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181226

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190426

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502011015212

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181226

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20190927

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181226

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181226

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181226

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191031

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191031

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191025

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20191031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191025

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 1081811

Country of ref document: AT

Kind code of ref document: T

Effective date: 20191025

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191025

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181226

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20111025

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181226

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181226

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230516

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20231025

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20231025

Year of fee payment: 13

Ref country code: IT

Payment date: 20231031

Year of fee payment: 13

Ref country code: FR

Payment date: 20231023

Year of fee payment: 13

Ref country code: DE

Payment date: 20231018

Year of fee payment: 13