EP1609996A1 - Rotor, in particular for an axial fan - Google Patents

Rotor, in particular for an axial fan Download PDF

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Publication number
EP1609996A1
EP1609996A1 EP05104899A EP05104899A EP1609996A1 EP 1609996 A1 EP1609996 A1 EP 1609996A1 EP 05104899 A EP05104899 A EP 05104899A EP 05104899 A EP05104899 A EP 05104899A EP 1609996 A1 EP1609996 A1 EP 1609996A1
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EP
European Patent Office
Prior art keywords
hub
ronde
portions
impeller according
impeller
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.)
Granted
Application number
EP05104899A
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German (de)
French (fr)
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EP1609996B1 (en
Inventor
Erhard Gruber
Reinhard Strohmeier
Otmar Huegel
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
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Ebm Papst Mulfingen GmbH and Co KG
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Publication date
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Priority to PL05104899T priority Critical patent/PL1609996T3/en
Publication of EP1609996A1 publication Critical patent/EP1609996A1/en
Application granted granted Critical
Publication of EP1609996B1 publication Critical patent/EP1609996B1/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
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • F04D25/0613—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
    • 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

Definitions

  • the invention relates to an impeller, in particular for an axial fan, with a Wheel body, which consists of several, in particular radially outwardly projecting blades as well as with the blades supporting, substantially tubular, to Attachment to a rotating part, such as a rotor, press-on hub, wherein in the hub inside a substantially cylindrical Ronde is arranged.
  • Axial Lmonerator each having a wheel body, which consists of several after outwardly projecting blades and one carrying the blades, on the rotor of a External rotor mountable hub, are well known.
  • the Applicant's manufacturing program also includes axial fan wheels of the type mentioned above, in which the hub respectively tubular is formed and can be pressed onto the rotor for attachment, wherein in the hub on the inside a plastic-encapsulated, substantially cylindrical, metallic Ronde is arranged, which is the rotor of the external rotor motor in the assembled state encloses circumferentially.
  • the cylindrically shaped steel blank of the known Plastic wheels are widened during the pressing process. Because the plastic hub all over the steel ridge rests, their expansion is forwarded to the hub, causing it in the hub disadvantageously too high mechanical stresses can even cause a wheel break in some cases. Other disadvantages are also that a drainage of condensation, which can not occur when dew point falls in the hub, is not possible and that the plastic hub obstructs the heat output through the rotor surface.
  • the invention is based on the object with low manufacturing technology Effort an impeller of the type described above with higher mechanical Stability, in particular an impeller that allows mechanical Tensions in the hub, which as a result of a pressing operation on a rotor shaft arise, reduce.
  • Ronde alternately arranged first and second sections, wherein the first sections respectively a larger inner diameter than the inner diameter of the second sections exhibit.
  • a segmented metallic Ronde in particular Stahlronde used, which is understood by “segmented” that the cylindrical part of the round blank in the mentioned sections with different Inner diameters is divided.
  • the smaller diameter sections become widened during the pressing process, while the sections with large Segment diameter not or only their radial position during pressing slightly, but advantageously lowering the mean level cause the mechanical voltage values.
  • the hub in the sense of a high mechanical stability can be connected via bridges to the Ronde, one can Plastic encapsulation of the Ronde be designed so that in particular in the field of small diameter pockets are inserted in the hub. So will one at Pressing occurring deformation of the blank is not forwarded to the hub.
  • the pockets in the hub can also be advantageous in the axial direction be executed continuously, so that between suction and pressure side of the fan a connection is made. This gives you two more benefits - namely, that drainage of possibly forming condensate allows and that is a between suction and pressure side through the pockets adjusting air flow improves the cooling of the rotor.
  • an inventive impeller has a Wheel body 1, the plurality, in particular radially outwardly projecting blades. 2 and a bearing the blades 2, substantially tubular hub 3 includes.
  • the hub 3 is on the inside surrounded by a plastic extrusion 4, in Substantially cylindrical metallic Ronde 5 arranged in Figs. 9 and 10 than Item is shown.
  • the wheel body 1 is, as shown in FIG. 5 and FIG. 6 to 8 illustrate, attachable to a rotor 6 of an engine and forms a Axiaventilator by the hub 3 is pressed onto the rotor 6 of the engine.
  • the Metallic Ronde 5 is thereby surrounded by the surrounding plastic extrusion. 4 fastened in the hub 3 held.
  • the Ronde 5 alternately arranged first and second sections 5a, 5b, the first sections 5a each having a larger inner diameter DA than the inner diameter DB of the second sections 5b have. Between the first sections 5a and the second sections 5b each transition sections 5c are arranged, in which the larger Inner diameter DA merges into the smaller inner diameter DB.
  • the Ronde 5 than Item show, is particularly clear, is after pressing on the Rotor 6 of the motor, a reduction or more even distribution of mechanical stresses in the hub 3, which leads to an increased lead to mechanical stability.
  • the transition sections 5c prevent this sudden changes in the mechanical stresses in the blank 5.
  • FIGS. 6 and 9 shown show that the Ronde 5, in particular in the region of the sections 5a with the larger inner diameters DA, via webs 7, preferably over parallel to a longitudinal axis X-X (only in FIGS. 6 and 9 shown) extending webs 7, can be connected to the hub 3.
  • the round plate 5, can do this accordingly, especially in the area of sections 5a with the larger ones Inner diameters DA, distributed over its annular circumference radially outward have projecting tabs 8.
  • the execution of these tabs 8 on the Ronde. 5 in particular Figs. 9 and 10, while Fig. 3, more clearly Fig. 4, as well as in the section Fig. 6 and more clearly Fig.
  • the webs 7 may be preferred - as shown - each of a first Web portion 7a and consist of a second web portion 7b, the latter is in the field of plastic extrusion 4 or in particular a Part of the plastic extrusion 4 forms, which the Ronde 5 along its encompasses entire outer surface cuff-like.
  • the first web section 7a is located in each case in an area of the hub 3, in which this opposite to the Surface of the Ronde 5 radially springs back to the outside, which by the with the Reference symbol S in Fig. 8 indicated distance is indicated.
  • the tabs 8 in each case preferably form the boundary between the first Web portion 7a and the second web portion 7b.
  • the first web section 7a increases the connection surface on the hub and thus causes increased stability.
  • Another advantage of the invention is that in the hub 3 pockets 9, preferably with a slot-like floor plan, can be introduced, the in particular in the area of the small diameter DB of the round blank 5 in accordance with the scope of FIG the plastic extrusion 4 are arranged.
  • An entering during pressing Deformation of the blank 5 is caused by a deformation of the adjacent to the Ronde, unspecified pocket walls added and not to the rest Body of the hub 3 forwarded.
  • the pockets 9 in the hub 3 in the axial Direction are executed continuously.
  • the resulting breakthroughs in the hub area are - as already mentioned - advantageously a flow around the Rotor 6 with cooling air and a drain of forming at dew point Condensation possible.
  • the presence or the described Training the pockets 9 an independent inventive importance attached.
  • the present Invention is not limited to the illustrated embodiments, but includes all the same means and measures in the context of the invention. So is for example, the inventively provided Ronde segmentation not a particular type of engine, such as an outrunner, or a specific type the located on the hub 3 blades 2 bound. Furthermore, it is also in the scope of the invention, when the Ronde 5 not, as described, on the cloth 8 preferably cohesively, but for example non-positively and / or positively in the hub 3 is fixed, i.e. when e.g. no encapsulation 4 of the blank 5, but a locking is provided.
  • the invention is not limited to the feature combination defined in claim 1 but also by any other combination of certain characteristics of all the individual features disclosed. This means that basically every single feature of claim 1 omitted or disclosed by at least one elsewhere in the application Single feature can be replaced. In this respect, the claim form is only as one to understand first formulation attempt for an invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

An axial ventilator has a fan with a number of blades whose roots are attached to a circular hub. The hub has an outer face on the root side and an inner face with a series of alternating thick (5b) and thin (5a) sections.

Description

Die Erfindung betrifft ein Laufrad, insbesondere für einen Axialventilator, mit einem Radkörper, der aus mehreren, insbesondere radial nach außen ragenden, Schaufeln sowie mit einer die Schaufeln tragenden, im Wesentlichen rohrförmigen, zur Befestigung auf ein rotierendes Teil, wie einen Rotor, aufpressbaren Nabe besteht, wobei in der Nabe innenseitig eine im Wesentlichen zylindrische Ronde angeordnet ist.The invention relates to an impeller, in particular for an axial fan, with a Wheel body, which consists of several, in particular radially outwardly projecting blades as well as with the blades supporting, substantially tubular, to Attachment to a rotating part, such as a rotor, press-on hub, wherein in the hub inside a substantially cylindrical Ronde is arranged.

Axialventilatorräder, die jeweils einen Radkörper aufweisen, der aus mehreren nach außen ragenden Schaufeln und einer die Schaufeln tragenden, an dem Rotor eines Außenläufermotors befestigbaren Nabe besteht, sind allgemein bekannt.Axial Lüfteratorräder, each having a wheel body, which consists of several after outwardly projecting blades and one carrying the blades, on the rotor of a External rotor mountable hub, are well known.

Aus dem Fertigungsprogramm der Anmelderin sind des Weiteren Axialventilatorräder der eingangs genannten Art bekannt, bei denen die Nabe jeweils rohrförmig ausgebildet ist und zur Befestigung auf den Rotor aufpressbar ist, wobei in der Nabe innenseitig eine mit Kunststoff umspritzte, im Wesentlichen zylindrische, metallische Ronde angeordnet ist, die den Rotor des Außenläufermotors im montierten Zustand umfangsgemäß umschließt. Die zylindrisch geformte Stahlronde der bekannten Kunststoffräder wird beim Aufpressvorgang aufgeweitet. Da die Kunststoffnabe vollflächig an der Stahlronde anliegt, wird deren Aufweitung an die Nabe weitergeleitet, so dass es in der Nabe nachteiligerweise zu hohen mechanischen Spannungen kommen kann, die in einzelnen Fällen sogar einen Radbruch bewirken können. Weitere Nachteile bestehen auch darin, dass ein Ablaufen von Kondenswasser, welches sich bei Taupunktunterschreitungen in der Nabe bilden kann, nicht möglich ist, und dass die Kunststoffnabe die Wärmeabgabe über die Rotoroberfläche behindert.The Applicant's manufacturing program also includes axial fan wheels of the type mentioned above, in which the hub respectively tubular is formed and can be pressed onto the rotor for attachment, wherein in the hub on the inside a plastic-encapsulated, substantially cylindrical, metallic Ronde is arranged, which is the rotor of the external rotor motor in the assembled state encloses circumferentially. The cylindrically shaped steel blank of the known Plastic wheels are widened during the pressing process. Because the plastic hub all over the steel ridge rests, their expansion is forwarded to the hub, causing it in the hub disadvantageously too high mechanical stresses can even cause a wheel break in some cases. Other disadvantages are also that a drainage of condensation, which can not occur when dew point falls in the hub, is not possible and that the plastic hub obstructs the heat output through the rotor surface.

Der Erfindung liegt die Aufgabe zugrunde, mit geringem fertigungstechnischen Aufwand ein Laufrad der eingangs beschriebenen Art mit höherer mechanischer Stabilität zu schaffen, insbesondere ein Laufrad, das es gestattet, mechanischen Spannungen in der Nabe, welche infolge eines Aufpressvorgangs auf eine Rotorwelle entstehen, zu verringern.The invention is based on the object with low manufacturing technology Effort an impeller of the type described above with higher mechanical Stability, in particular an impeller that allows mechanical Tensions in the hub, which as a result of a pressing operation on a rotor shaft arise, reduce.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass die Ronde alternierend angeordnete erste und zweite Abschnitte umfasst, wobei die ersten Abschnitte jeweils einen größeren Innendurchmesser als die Innendurchmesser der zweiten Abschnitte aufweisen.This object is achieved in that the Ronde alternately arranged first and second sections, wherein the first sections respectively a larger inner diameter than the inner diameter of the second sections exhibit.

Es wird somit erfindungsgemäß eine segmentierte metallische Ronde, insbesondere Stahlronde, verwendet, wobei unter "segmentiert" verstanden wird, dass der zylindrische Teil der Ronde in die genannten Abschnitte mit unterschiedlichen Innendurchmessern unterteilt ist. Die Abschnitte mit kleinerem Durchmesser werden beim Aufpressvorgang aufgeweitet, während die Abschnitte mit großem Segmentdurchmesser ihre radiale Position beim Aufpressvorgang nicht oder nur geringfügig verändern, jedoch vorteilhafterweise eine Senkung des mittleren Niveaus der mechanischen Spannungswerte bewirken.It is thus according to the invention a segmented metallic Ronde, in particular Stahlronde used, which is understood by "segmented" that the cylindrical part of the round blank in the mentioned sections with different Inner diameters is divided. The smaller diameter sections become widened during the pressing process, while the sections with large Segment diameter not or only their radial position during pressing slightly, but advantageously lowering the mean level cause the mechanical voltage values.

Während im Bereich der größeren Durchmesser, wo nur eine geringfügige Verformung auftritt, in bevorzugter Ausführung der Erfindung die Nabe im Sinne einer hohen mechanischen Stabilität über Stege an die Ronde angebunden sein kann, kann eine Kunststoffumspritzung der Ronde so gestaltet sein, dass insbesondere im Bereich der kleinen Durchmesser in der Nabe Taschen eingebracht sind. So wird eine beim Aufpressen eintretende Verformung der Ronde nicht an die Nabe weitergeleitet.While in the range of larger diameter, where only a slight deformation occurs, in a preferred embodiment of the invention, the hub in the sense of a high mechanical stability can be connected via bridges to the Ronde, one can Plastic encapsulation of the Ronde be designed so that in particular in the field of small diameter pockets are inserted in the hub. So will one at Pressing occurring deformation of the blank is not forwarded to the hub.

Die Taschen in der Nabe können dabei auch mit Vorteil in axialer Richtung durchgehend ausgeführt sein, so dass zwischen Saug- und Druckseite des Lüfters eine Verbindung hergestellt ist. Dadurch erzielt man noch zwei weitere Vorteile - nämlich, dass ein Ablaufen von sich eventuell bildendem Kondenswasser ermöglicht wird und dass eine sich zwischen Saug- und Druckseite durch die Taschen einstellende Luftströmung die Kühlung des Rotors verbessert.The pockets in the hub can also be advantageous in the axial direction be executed continuously, so that between suction and pressure side of the fan a connection is made. This gives you two more benefits - namely, that drainage of possibly forming condensate allows and that is a between suction and pressure side through the pockets adjusting air flow improves the cooling of the rotor.

Weitere vorteilhafte Ausführungen der Erfindung sind in den Unteransprüchen und der nachfolgenden Beschreibung enthalten. Anhand eines in den beiliegenden Zeichnungsfiguren dargestellten Ausführungsbeispiels wird die Erfindung näher erläutert. Es zeigen:

Fig. 1
eine perspektivische Darstellung eines erfindungsgemäßen Laufrades,
Fig. 2
eine perspektivische Darstellung des in Fig. 1 dargestellten erfindungsgemäßen Laufrades, jedoch axial geschnitten,
Fig.3
eine Fig. 2 entsprechende Schnittdarstellung jedoch in einer perspektivischen Darstellung "von unten", d.h. in einer gegenüber Fig. 2 um 180° gedrehten Ansicht,
Fig. 4
eine vergrößerte Darstellung eines Ausschnitts aus Fig. 3,
Fig. 5
eine Draufsicht auf das in Fig. 1 dargestellte erfindungsgemäße Laufrad im montierten Zustand,
Fig. 6
eine axial geschnittene Seitenansicht eines erfindungsgemäßen Laufrades im montierten Zustand,
Fig. 7 und 8
vergrößerte Darstellungen der in Fig. 6 mit VII und VIII bezeichneten Details des erfindungsgemäßen Laufrades,
Fig. 9
eine perspektivische Darstellung einer Ronde eines erfindungsgemäßen Laufrades,
Fig. 10
eine perspektivische Darstellung der in Fig. 9 dargestellten erfindungsgemäß eingesetzten Ronde, jedoch teilgeschnitten.
Further advantageous embodiments of the invention are contained in the subclaims and the following description. Reference to an embodiment shown in the accompanying drawings, the invention is explained in detail. Show it:
Fig. 1
a perspective view of an impeller according to the invention,
Fig. 2
3 is a perspective view of the impeller according to the invention shown in FIG. 1, but axially cut,
Figure 3
2 but corresponding sectional view in a perspective view "from below", ie in a comparison with FIG. 2 rotated by 180 ° view,
Fig. 4
an enlarged view of a detail of Fig. 3,
Fig. 5
a plan view of the impeller according to the invention shown in Figure 1 in the mounted state,
Fig. 6
an axially sectioned side view of an impeller according to the invention in the mounted state,
FIGS. 7 and 8
enlarged views of the designated in Fig. 6 with VII and VIII details of the impeller according to the invention,
Fig. 9
a perspective view of a blank of an impeller according to the invention,
Fig. 10
a perspective view of the invention shown in Fig. 9 used Ronde, but partially cut.

In den Figuren der Zeichnung sind dieselben Teile auch stets mit denselben Bezugszeichen versehen, so dass sie in der Regel auch jeweils nur einmal beschrieben werden.In the figures of the drawing, the same parts are always with them Reference numerals provided so that they usually only once in each case to be discribed.

Wie zunächst Fig. 1 und 2 zeigen, besitzt ein erfindungsgemäßes Laufrad einen Radkörper 1, der mehrere, insbesondere radial nach außen ragende, Schaufeln 2 sowie eine die Schaufeln 2 tragende, im Wesentlichen rohrförmige Nabe 3 umfasst. In der Nabe 3 ist innenseitig eine mit einer Kunststoffumspritzung 4 umgebene, im Wesentlichen zylindrische, metallische Ronde 5 angeordnet, die in Fig. 9 und 10 als Einzelteil dargestellt ist. Der Radkörper 1 ist, wie Fig. 5 sowie Fig. 6 bis 8 veranschaulichen, auf einem Rotor 6 eines Motors befestigbar und bildet einen Axiaventilator, indem die Nabe 3 auf den Rotor 6 des Motors aufgepresst wird. Die metallische Ronde 5 wird dabei durch die sie umgebende Kunststoffumspritzung 4 befestigend in der Nabe 3 gehalten.As initially shown in FIGS. 1 and 2, an inventive impeller has a Wheel body 1, the plurality, in particular radially outwardly projecting blades. 2 and a bearing the blades 2, substantially tubular hub 3 includes. In the hub 3 is on the inside surrounded by a plastic extrusion 4, in Substantially cylindrical metallic Ronde 5 arranged in Figs. 9 and 10 than Item is shown. The wheel body 1 is, as shown in FIG. 5 and FIG. 6 to 8 illustrate, attachable to a rotor 6 of an engine and forms a Axiaventilator by the hub 3 is pressed onto the rotor 6 of the engine. The Metallic Ronde 5 is thereby surrounded by the surrounding plastic extrusion. 4 fastened in the hub 3 held.

Erfindungsgemäß ist vorgesehen, dass die Ronde 5 alternierend angeordnete erste und zweite Abschnitte 5a, 5b umfasst, wobei die ersten Abschnitte 5a jeweils einen größeren Innendurchmesser DA als die Innendurchmesser DB der zweiten Abschnitte 5b aufweisen. Zwischen den ersten Abschnitten 5a und den zweiten Abschnitten 5b sind jeweils Übergangsabschnitte 5c angeordnet, in denen der größere Innendurchmesser DA in den kleineren Innendurchmesser DB übergeht. Durch diese Segmentierung der Ronde 5, die insbesondere in Fig. 9 und 10, die die Ronde 5 als Einzelteil zeigen, besonders deutlich zu sehen ist, wird nach dem Aufpressen auf den Rotor 6 des Motors eine Verringerung bzw. gleichmäßigere Verteilung der mechanischen Spannungen in der Nabe 3 erreicht, die zu einer erhöhten mechanischen Stabilität führen. Die Übergangsabschnitte 5c verhindern dabei sprunghafte Änderungen der mechanischen Spannungen in der Ronde 5.According to the invention it is provided that the Ronde 5 alternately arranged first and second sections 5a, 5b, the first sections 5a each having a larger inner diameter DA than the inner diameter DB of the second sections 5b have. Between the first sections 5a and the second sections 5b each transition sections 5c are arranged, in which the larger Inner diameter DA merges into the smaller inner diameter DB. Through this Segmentation of Ronde 5, in particular in Figs. 9 and 10, the Ronde 5 than Item show, is particularly clear, is after pressing on the Rotor 6 of the motor, a reduction or more even distribution of mechanical stresses in the hub 3, which leads to an increased lead to mechanical stability. The transition sections 5c prevent this sudden changes in the mechanical stresses in the blank 5.

Fig. 3 - und in vergrößerter Darstellung Fig. 4 - zeigen, dass die Ronde 5, insbesondere im Bereich der Abschnitte 5a mit den größeren Innendurchmessern DA, über Stege 7, vorzugsweise über parallel zu einer Längsachse X-X (nur in Fig. 6 und 9 dargestellt) verlaufende Stege 7, an die Nabe 3 angebunden sein kann. Die Ronde 5, kann dazu entsprechend, insbesondere im Bereich der Abschnitte 5a mit den größeren Innendurchmessern DA, über ihren ringförmigen Umfang verteilt radial nach außen abstehende Lappen 8 aufweisen. Die Ausführung dieser Lappen 8 an der Ronde 5 veranschaulichen insbesondere Fig. 9 und 10, während Fig. 3, deutlicher Fig. 4, sowie im Schnitt Fig. 6 und deutlicher Fig. 7 zeigen, wie die Lappen 8 bevorzugt mit der Nabe 3 verbunden sein können - nämlich, dass die Lappen 8 der Ronde 5 form- und stoffschlüssig in die Kunststoffumspritzung 4 eingebettet sind. Die Einbettung befindet sich dabei mit Vorteil im Sinne einer hohen Stabilität im Bereich der Stege 7, die einstückig mit der Nabe 3 ausgebildet sind.3 - and in an enlarged view Fig. 4 - show that the Ronde 5, in particular in the region of the sections 5a with the larger inner diameters DA, via webs 7, preferably over parallel to a longitudinal axis X-X (only in FIGS. 6 and 9 shown) extending webs 7, can be connected to the hub 3. The round plate 5, can do this accordingly, especially in the area of sections 5a with the larger ones Inner diameters DA, distributed over its annular circumference radially outward have projecting tabs 8. The execution of these tabs 8 on the Ronde. 5 in particular Figs. 9 and 10, while Fig. 3, more clearly Fig. 4, as well as in the section Fig. 6 and more clearly Fig. 7 show how the lobes 8 preferably with the hub 3 may be connected - namely, that the lobes 8 of the Ronde 5 form- and are cohesively embedded in the plastic extrusion 4. The embedding is located This is advantageous in terms of a high stability in the region of the webs 7, the are formed integrally with the hub 3.

Die Stege 7 können dabei bevorzugt - wie dargestellt - jeweils aus einem ersten Stegabschnitt 7a und aus einem zweiten Stegabschnitt 7b bestehen, wobei Letzterer sich im Bereich der Kunststoffumspritzung 4 befindet bzw. insbesondere einen Bestandteil der Kunststoffumspritzung 4 bildet, welche die Ronde 5 entlang ihrer gesamten äußeren Mantelfläche manschettenartig umfaßt. Der erste Stegabschnitt 7a befindet sich dabei jeweils in einem Bereich der Nabe 3, in dem diese gegenüber der Mantelfläche der Ronde 5 radial nach außen zurückspringt, was durch den mit dem Bezugszeichen S in Fig. 8 bezeichneten Abstand angedeutet ist. Wie Fig. 7 zeigt, bilden die Lappen 8 dabei jeweils bevorzugt die Grenze zwischen dem ersten Stegabschnitt 7a und dem zweiten Stegabschnitt 7b. Der erste Stegabschnitt 7a vergrößert die Anbindungsfläche an der Nabe und bewirkt somit eine erhöhte Stabilität.The webs 7 may be preferred - as shown - each of a first Web portion 7a and consist of a second web portion 7b, the latter is in the field of plastic extrusion 4 or in particular a Part of the plastic extrusion 4 forms, which the Ronde 5 along its encompasses entire outer surface cuff-like. The first web section 7a is located in each case in an area of the hub 3, in which this opposite to the Surface of the Ronde 5 radially springs back to the outside, which by the with the Reference symbol S in Fig. 8 indicated distance is indicated. As FIG. 7 shows, The tabs 8 in each case preferably form the boundary between the first Web portion 7a and the second web portion 7b. The first web section 7a increases the connection surface on the hub and thus causes increased stability.

Ein weiterer Vorteil der Erfindung besteht darin, dass in die Nabe 3 Taschen 9, vorzugsweise mit langlochartigem Grundriss, eingebracht sein können, die insbesondere im Bereich der kleinen Durchmesser DB der Ronde 5 umfangsgemäß in der Kunststoffumspritzung 4 angeordnet sind. Eine beim Aufpressen eintretende Verformung der Ronde 5 wird durch eine Verformung der an der Ronde anliegenden, nicht näher bezeichneten Taschenwände aufgenommen und nicht an den übrigen Körper der Nabe 3 weitergeleitet.Another advantage of the invention is that in the hub 3 pockets 9, preferably with a slot-like floor plan, can be introduced, the in particular in the area of the small diameter DB of the round blank 5 in accordance with the scope of FIG the plastic extrusion 4 are arranged. An entering during pressing Deformation of the blank 5 is caused by a deformation of the adjacent to the Ronde, unspecified pocket walls added and not to the rest Body of the hub 3 forwarded.

Nahezu sämtliche Figuren der Zeichnung (außer Fig. 7, 9 und 10) zeigen jedoch, dass sich die Taschen 9 auch im Bereich der großen Durchmesser DA der Ronde 5 in der Kunststoffumspritzung 4 erstrecken können. Die umfangsgemäß zwischen den Taschen 9 liegenden Wände werden dabei jedoch bevorzugt durch die im Bereich der großen Durchmesser DA in der Kunststoffumspritzung 4 liegenden, vorstehend beschriebenen zweiten Stegabschnitte 7b gebildet, die dafür sorgen, daß die Flächenpressung zwischen Kunststoffumspritzung 4 und Ronde 5 in jedem Fall ausreichend hoch ist und durch die Verformung der Taschen 9 keine Delamination der Kunststoffumspritzung 4 von der Ronde 5 eintritt.Almost all the figures of the drawing (except Figures 7, 9 and 10) show that the pockets 9 are also in the range of the large diameter DA of the Ronde 5 in the Plastic extrusion 4 can extend. The circumferentially between the But pockets 9 lying walls are preferred by the in the area of large diameter DA lying in the plastic extrusion 4, above described second web portions 7 b are formed, which ensure that the Surface pressure between Kunststoffumspritzung 4 and Ronde 5 in each case is sufficiently high and by the deformation of the pockets 9 no delamination of the Plastic extrusion 4 enters from the blank 5.

Es kann bevorzugt vorgesehen sein, dass die Taschen 9 in der Nabe 3 in axialer Richtung durchgehend ausgeführt sind. Durch die dadurch entstehenden Durchbrüche im Nabenbereich werden - wie bereits erwähnt - vorteilhafterweise ein Umströmen des Rotors 6 mit Kühlluft und ein Ablaufen von sich bei Taupunktunterschreitung bildendem Kondenswasser möglich. Insofern wird dem Vorhandensein bzw. der beschriebenen Ausbildung der Taschen 9 eine eigenständige erfinderische Bedeutung beigemessen.It may preferably be provided that the pockets 9 in the hub 3 in the axial Direction are executed continuously. By the resulting breakthroughs in the hub area are - as already mentioned - advantageously a flow around the Rotor 6 with cooling air and a drain of forming at dew point Condensation possible. In this respect, the presence or the described Training the pockets 9 an independent inventive importance attached.

Wie bereits aus den vorstehenden Ausführungen hervorgeht, ist die vorliegende Erfindung nicht auf die dargestellten Ausführungsbeispiele beschränkt, sondern umfasst alle im Sinne der Erfindung gleichwirkenden Mittel und Maßnahmen. So ist beispielsweise die erfindungsgemäß vorgesehene Rondensegmentierung nicht an einen bestimmten Motortyp, wie einen Außenläufer, oder eine bestimmte Ausführung der an der Nabe 3 befindlichen Schaufeln 2 gebunden. Des Weiteren fällt es auch in den Rahmen der Erfindung, wenn die Ronde 5 nicht, wie beschrieben, über die Lappen 8 vorzugsweise stoffschlüssig, sondern beispielsweise kraft- und/oder formschlüssig in der Nabe 3 befestigt ist, d.h., wenn z.B. keine Umspritzung 4 der Ronde 5, sondern eine Verrastung vorgesehen wird.As already apparent from the above, is the present Invention is not limited to the illustrated embodiments, but includes all the same means and measures in the context of the invention. So is For example, the inventively provided Ronde segmentation not a particular type of engine, such as an outrunner, or a specific type the located on the hub 3 blades 2 bound. Furthermore, it is also in the scope of the invention, when the Ronde 5 not, as described, on the cloth 8 preferably cohesively, but for example non-positively and / or positively in the hub 3 is fixed, i.e. when e.g. no encapsulation 4 of the blank 5, but a locking is provided.

Ferner ist die Erfindung nicht auf die im Anspruch 1 definierte Merkmalskombination beschränkt, sondern kann auch durch jede beliebige andere Kombination von bestimmten Merkmalen aller insgesamt offenbarten Einzelmerkmale definiert sein. Dies bedeutet, dass grundsätzlich praktisch jedes Einzelmerkmal des Anspruchs 1 weggelassen bzw. durch mindestens ein an anderer Stelle der Anmeldung offenbartes Einzelmerkmal ersetzt werden kann. Insofern ist die Anspruchsfassung lediglich als ein erster Formulierungsversuch für eine Erfindung zu verstehen. Furthermore, the invention is not limited to the feature combination defined in claim 1 but also by any other combination of certain characteristics of all the individual features disclosed. This means that basically every single feature of claim 1 omitted or disclosed by at least one elsewhere in the application Single feature can be replaced. In this respect, the claim form is only as one to understand first formulation attempt for an invention.

Bezugszeichenreference numeral

11
RadkörperWheel center
22
Schaufel von 1Scoop of 1
33
Nabe von 1Hub of 1
44
Kunststoffumspritzung von 3Plastic extrusion of 3
55
RondeRonde
5a5a
erster Abschnitt von 5 mit Durchmesser DAfirst section of 5 with diameter DA
5b5b
zweiter Abschnitt von 5 mit Durchmesser DBsecond section of 5 with diameter DB
66
Rotor (Axialventilator-Motor)Rotor (axial fan motor)
77
Steg von 3Footbridge of 3
7a7a
erster Stegabschnitt von 7first bridge section of 7
7b7b
zweiter Stegabschnitt von 7second bridge section of 7
88th
Lappen von 5Rag from 5
99
Tasche in 3 bzw. 4Bag in 3 or 4
DATHERE
Durchmesser von 5aDiameter of 5a
DBDB
Durchmesser von 5bDiameter of 5b
X-XX X
Längsachse von 1Longitudinal axis of 1

Claims (9)

Laufrad, insbesondere für einen Axialventilator, mit einem Radkörper (1), der aus mehreren, insbesondere radial nach außen ragenden, Schaufeln (2) sowie mit einer die Schaufeln (2) tragenden, im Wesentlichen rohrförmigen, zur Befestigung auf ein rotierendes Teil, wie einen Rotor (6), aufpressbaren Nabe (3) besteht, wobei in der Nabe (3) innenseitig eine im Wesentlichen zylindrische Ronde (5) angeordnet ist,
dadurch gekennzeichnet , dass die Ronde (5) alternierend angeordnete erste und zweite Abschnitte (5a, 5b) umfasst, wobei die ersten Abschnitte (5a) jeweils einen größeren Innendurchmesser (DA) als die Innendurchmesser (DB) der zweiten Abschnitte (5b) aufweisen.Impeller, in particular for an axial fan, comprising a wheel body (1) comprising a plurality of blades (2), in particular radially outwardly projecting, and a substantially tubular bearing the blades (2) for attachment to a rotating part, such as a rotor (6), pressable hub (3), wherein in the hub (3) inside a substantially cylindrical Ronde (5) is arranged,
characterized in that the blank (5) comprises alternately arranged first and second portions (5a, 5b), wherein the first portions (5a) each have a larger inner diameter (DA) than the inner diameter (DB) of the second portions (5b). Laufrad nach Anspruch 1,
dadurch gekennzeichnet , dass die - inbesondere metallische - Ronde (5) von einer Kunststoffumspritzung (4) umgeben ist.Impeller according to claim 1,
characterized in that the - in particular metallic - Ronde (5) by a plastic extrusion (4) is surrounded. Laufrad nach Anspruch 1 oder 2,
dadurch gekennzeichnet , dass zwischen den ersten Abschnitten (5a) und den zweiten Abschnitten (5b) Übergangsabschnitte (5c) angeordnet sind, in denen der größere Innendurchmesser (DA) in den kleineren Innendurchmesser (DB) übergeht.Impeller according to claim 1 or 2,
characterized in that between the first portions (5a) and the second portions (5b) transition portions (5c) are arranged, in which the larger inner diameter (DA) merges into the smaller inner diameter (DB). Laufrad nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet , dass die Ronde (5), insbesondere im Bereich der Abschnitte (5a) mit den größeren Innendurchmessern (DA), über Stege (7), vorzugsweise über parallel zu einer Längsachse (X-X) des Radkörpers (1) verlaufende, einstückig mit der Nabe (3) ausgebildete Stege (7), an die Nabe (3) angebunden ist.Impeller according to one of claims 1 to 3,
characterized in that the Ronde (5), in particular in the region of the portions (5a) with the larger inner diameters (DA), via webs (7), preferably over parallel to a longitudinal axis (XX) of the wheel body (1) extending, integrally with the hub (3) formed webs (7), is connected to the hub (3). Laufrad nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet , dass die Ronde (5), insbesondere im Bereich der Abschnitte (5a) mit den größeren Innendurchmessern (DA), radial nach außen abstehende Lappen (8) aufweist. Impeller according to one of claims 1 to 4,
characterized in that the Ronde (5), in particular in the region of the portions (5a) with the larger inner diameters (DA), radially outwardly projecting tabs (8). Laufrad nach Anspruch 2 und 5,
dadurch gekennzeichnet , dass die Lappen (8) der Ronde (5) form- und stoffschlüssig, insbesondere im Bereich der Stege (7), in die Kunststoffumspritzung (4) eingebettet sind.Impeller according to claim 2 and 5,
characterized in that the tabs (8) of the blank (5) are positively and materially, in particular in the region of the webs (7), embedded in the plastic extrusion (4). Laufrad, insbesondere nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, dass in die Nabe (3) Taschen (9) eingebracht sind, die insbesondere im Bereich der kleineren Durchmesser (DB) der Ronde (5) in der Kunststoffumspritzung (4) angeordnet sind.Impeller, in particular according to one of claims 1 to 6,
characterized in that in the hub (3) pockets (9) are introduced, which are arranged in particular in the region of the smaller diameter (DB) of the blank (5) in the plastic extrusion (4). Laufrad nach Anspruch 7,
dadurch gekennzeichnet, dass die Taschen (9) in der Nabe (3) in axialer Richtung (X-X) durchgehend ausgeführt sind.Impeller according to claim 7,
characterized in that the pockets (9) in the hub (3) in the axial direction (XX) are designed to be continuous. Laufrad nach Anspruch 7 oder 8,
dadurch gekennzeichnet , dass die Taschen (9) im Grundriss langlochartig ausgeführt und insbesondere durch einen Stegabschnitt (7b) der die Ronde (5) an der Nabe anbindenden Stege (7) umfangsgemäß voneinander getrennt sind.Impeller according to claim 7 or 8,
characterized in that the pockets (9) executed in the planhole slot-like and in particular by a web portion (7b) of the Ronde (5) to the hub connecting webs (7) are circumferentially separated from each other.
EP05104899A 2004-06-25 2005-06-06 Rotor, in particular for an axial fan Active EP1609996B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL05104899T PL1609996T3 (en) 2004-06-25 2005-06-06 Rotor, in particular for an axial fan

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DE202004010088U 2004-06-25
DE202004010088U DE202004010088U1 (en) 2004-06-25 2004-06-25 Impeller, in particular for an axial fan

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EP1609996B1 EP1609996B1 (en) 2007-08-08

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US (1) US7442010B2 (en)
EP (1) EP1609996B1 (en)
CN (1) CN100445571C (en)
AT (1) ATE369497T1 (en)
AU (1) AU2005202448B2 (en)
DE (2) DE202004010088U1 (en)
DK (1) DK1609996T3 (en)
ES (1) ES2290852T3 (en)
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Also Published As

Publication number Publication date
US20050287005A1 (en) 2005-12-29
ES2290852T3 (en) 2008-02-16
DE502005001164D1 (en) 2007-09-20
PT1609996E (en) 2007-11-13
DK1609996T3 (en) 2007-12-17
AU2005202448A1 (en) 2006-01-12
US7442010B2 (en) 2008-10-28
CN1712737A (en) 2005-12-28
CN100445571C (en) 2008-12-24
AU2005202448B2 (en) 2010-08-05
EP1609996B1 (en) 2007-08-08
ATE369497T1 (en) 2007-08-15
DE202004010088U1 (en) 2004-09-09
PL1609996T3 (en) 2007-11-30

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