EP1219837A2 - Fan with axial blades - Google Patents

Fan with axial blades Download PDF

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Publication number
EP1219837A2
EP1219837A2 EP01125014A EP01125014A EP1219837A2 EP 1219837 A2 EP1219837 A2 EP 1219837A2 EP 01125014 A EP01125014 A EP 01125014A EP 01125014 A EP01125014 A EP 01125014A EP 1219837 A2 EP1219837 A2 EP 1219837A2
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EP
European Patent Office
Prior art keywords
blade
fan
stabilizers
fan according
hub
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
EP01125014A
Other languages
German (de)
French (fr)
Other versions
EP1219837A3 (en
EP1219837B1 (en
Inventor
Uwe Dipl.-Ing. Blass
Christoph Dipl.-Ing. Kurdzel
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 Behr GmbH and Co KG
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Behr 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
Priority claimed from DE2001100064 external-priority patent/DE10100064A1/en
Application filed by Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Publication of EP1219837A2 publication Critical patent/EP1219837A2/en
Publication of EP1219837A3 publication Critical patent/EP1219837A3/en
Application granted granted Critical
Publication of EP1219837B1 publication Critical patent/EP1219837B1/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
    • 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
    • F04D29/38—Blades
    • F04D29/384—Blades characterised by form

Definitions

  • the invention relates to a fan with axial blades, in particular for radiators of motor vehicles according to claims 1 or 2 of the Main application 199 29 978.1 of the applicant.
  • the Air-guiding elements are in the hub and Air-guiding elements on the suction side of the axial blades arranged.
  • the air guiding elements extend over the entire blade division, that is, from the leading edge of an axial blade to the leading edge of one adjacent axial blade.
  • This particular embodiment of the Air guiding elements, as shown in FIGS. 3 and 4 of the main application is thus a continuous surface or between two blades the wall for a closed flow channel. With certain These closed flow channels can provide flow conditions disadvantageous, in particular they can lead to congestion effects and vortex formation, that means lead to flow losses.
  • the task of this additional application corresponds to that of the aforementioned Main application, it aims at a further advantageous embodiment of the Invention after the main application, in particular an avoidance of aforementioned congestion effects due to a closed flow channel.
  • the air guiding elements are considered fin-like Stabilizers formed, which are only in the circumferential direction Range from 1% to 40% of the blade pitch.
  • the air control elements leave one between two blades and the hub open flow channel, in which the hub flow and Blade flow are controlled.
  • the stabilizers in Blade root area cause on the suction side, the blades a Separation of hub and blade flow and prevent separation the flow as well as a harmful vortex formation.
  • Similar fin-like air guiding elements are known per se, namely as so-called boundary layer fences from DE 26 14 318 C2 or as so-called auxiliary wing from DE 27 56 880 C2.
  • these are Border layer fences or auxiliary wings according to the prior art in the radial outermost area of the blades, that is in the blade tip area arranged.
  • These boundary layer fences are supposed to flow on the one hand Supply energy and on the other hand a flow around the blade tips Prevent (from the pressure side to the suction side).
  • They are opposite Stabilizers according to the invention in the vicinity of the hub, that is in the Blade root area arranged.
  • the Length of the stabilizers as seen in the direction of air flow, the length of the Axial blades, with the front edge of the stabilizers slightly opposite the blade leading edge can be offset in the flow direction.
  • the area of the stabilizers is preferably light in the radial direction curved outwards, that is, slightly concave. This too Measure takes the course of the flow in the blade root area Bill.
  • the stabilizers in one radial range from 0 to 40% of the blade height H, preferably from 0 up to 20% are arranged. In this area the hub flow and the flow at the blade root can be most effectively influenced.
  • the hub in a fluid friction clutch on its inner area, which on its Front has radially aligned cooling fins.
  • the latter generate one essentially radially oriented air flow, a so-called cooling air flow.
  • each stabilizer Assigned radial blade elements that is, so-called flow dividers after the main registration.
  • the latter reach into the front edge radially oriented cooling air flow and steer this relatively low loss on the pressure side of the blades, i.e. in the area of the hub ramp around.
  • the outer surfaces of the radial blade element and the hub ramp a common one Area so that a favorable flow in the hub area is achieved becomes.
  • the areas of the Stabilizer, the radial blade element and the hub ramp into each other over, so that the blade root pressure and suction side of one common area is surrounded, which is a particularly low loss Flow generated.
  • FIG. 1 shows an axial fan 1 with eight substantially radially oriented fan blades 2, which are fastened on a hub 3.
  • This fan 1 or its hub 3 is fastened on a fluid friction clutch 4 with radially extending cooling fins 4 ′, which drives the fan 1 in the direction of arrow A.
  • Stabilizers 5 and radial blade elements 6 are arranged in the area of the hub 3.
  • Fig. 2 shows a side view of the fan 1 with a view of the blade 2 in the direction of its radial longitudinal axis.
  • This blade 2 has a leading edge or leading edge 7, a trailing or trailing edge 8 and a suction side 9 and a pressure side 10.
  • Arranged on the suction side 9 is the fin-like stabilizer 5, which has an outer boundary line 11 and an inner boundary line 12 (at the connection point with the blade 2).
  • the circumferential extension s of the stabilizer 5 increases from the inflow side (s 1 ) to the outflow side (s 2 ), ie s 2 > s 1.
  • the length I of the stabilizer 5 essentially corresponds to the blade length L, the front edge 13 of the stabilizer 5 is set back somewhat from the front edge 7 of the blade, while the rear edge 14 is approximately flush with the rear edge 8 of the blade.
  • the length L can be approximately 175 mm.
  • the radial blade element 6 In the front area of the hub 3 is in the direction of flow (that is against the direction of rotation A) in front of the blade leading edge 7, the radial blade element 6 arranged, which in the main application also as Flow divider was called. This radial blade element covers the front part of the fluid friction clutch 4 in the axial direction, while the front edge 15 of the hub 3 is somewhat in this area is reset.
  • the fan blades 2 have a radial extension or height H.
  • the stabilizers 5 are arranged, which are slightly concave, that is curved outward in the radial direction.
  • the stabilizers 5 can be demolded in the axial direction (in the direction of the axis of rotation M). This is particularly advantageous if the fan is injection molded as a plastic part or manufactured as a cast part.
  • the dashed lines 16 show the course of the hub ramp on the back (pressure side) of the blade 2.
  • the fan 4 shows the fan 1 in a view from the rear, that is to say in the direction of the axis of rotation M.
  • the fan blade 2 which is injection molded as a plastic part, has in its left, that is to say the suction side region, the stabilizer 5 which projects approximately at right angles and which is connected to the fan blade 2 is molded.
  • the axial demoldability of the stabilizers 5 is also evident here.
  • the upper edge of the hub ramp is marked with the reference number 16 on the right side of the blade.
  • FIG. 6 shows a section along the line VI-VI in FIG. 4 looking towards the suction side 9 of the blade 2.
  • the axial demoldability is clear for the cut area 5 ′ of the stabilizer 5.
  • FIG. 7 shows an enlarged view, that is to say a partial view of FIG. 1 for the blade root region.
  • the surfaces of the stabilizers 5, the radial blade elements or flow dividers 6 and the hub ramp 16 can clearly be seen here.
  • the surface elements 5 and 6 are interrupted in this embodiment by the front edge 7 of the blade 2.
  • FIG 8 shows a further exemplary embodiment in which the outer surfaces 5a and 6a of the stabilizers 5 and the radial blade elements 6 are integrated into one another in such a way that they form a common, seamless surface with a common front edge 17.
  • the surface element 6a therefore merges with the surface element 5a on the suction side of the blade 2 and with the surface element 16 of the hub ramp on the pressure side of the blade. This results in a low-loss flow around the blade root, that is to say in the hub region, the essentially radially oriented cooling air flow of the fluid friction clutch being brought together in a controlled manner with the flow around the blade. This can improve the performance of this fan, especially in connection with the clutch.

Abstract

The fan with axial blades, particularly for a road vehicle radiator, has axial blades (2) fixed to a nave (3), with air guide components arranged in the nave area and on the suction side of the axial blades. The air guide components are formed as fin-type stabilizers (5), with their extent(s) in a peripheral direction being in the range of 0.01 t is less than or equal to s is less than or equal to 0.40 t, where t is the blade distribution. The length of the stabilizers corresponds approximately to the length of the axial blades. The front edge of the stabilizers is displaced in relation to the front edge of the blades in the air flow direction.

Description

Die Erfindung bezieht sich auf einen Lüfter mit Axialschaufeln, insbesondere für Kühler von Kraftfahrzeugen nach den Ansprüchen 1 oder 2 der Hauptanmeldung 199 29 978.1 der Anmelderin.The invention relates to a fan with axial blades, in particular for radiators of motor vehicles according to claims 1 or 2 of the Main application 199 29 978.1 of the applicant.

Nach der vorgenannten Hauptanmeldung sind im nabennahen und saugseitigen Bereich der Axialschaufeln sogenannte Luftleitelemente angeordnet. Zusätzlich ist im druckseitigen Bereich der Axialschaufel eine sogenannte Nabenrampe vorgesehen. In einer bevorzugten Ausführungsform erstrecken sich die Luftleitelemente über die gesamte Schaufelteilung, das heißt von der Vorderkante einer Axialschaufel bis zur Vorderkante einer benachbarten Axialschaufel. Diese besondere Ausführungsform der Luftleitelemente, wie sie in den Fig. 3 und 4 der Hauptanmeldung dargestellt ist, bildet somit zwischen zwei Schaufeln eine durchgehende Fläche bzw. die Wand für einen geschlossenen Strömungskanal. Bei bestimmten Strömungszuständen können diese geschlossenen Strömungskanäle nachteilig sein, insbesondere können sie zu Staueffekten und Wirbelbildungen, das heißt zu Strömungsverlusten führen.After the aforementioned main application are in the hub and Air-guiding elements on the suction side of the axial blades arranged. In addition, there is one in the pressure-side area of the axial vane so-called hub ramp provided. In a preferred embodiment the air guiding elements extend over the entire blade division, that is, from the leading edge of an axial blade to the leading edge of one adjacent axial blade. This particular embodiment of the Air guiding elements, as shown in FIGS. 3 and 4 of the main application is thus a continuous surface or between two blades the wall for a closed flow channel. With certain These closed flow channels can provide flow conditions disadvantageous, in particular they can lead to congestion effects and vortex formation, that means lead to flow losses.

Die Aufgabe dieser Zusatzanmeldung entspricht der der vorgenannten Hauptanmeldung, sie bezweckt eine weitere vorteilhafte Ausgestaltung der Erfindung nach der Hauptanmeldung, insbesondere eine Vermeidung der vorgenannten Staueffekte infolge eines geschlossenen Strömungskanals.The task of this additional application corresponds to that of the aforementioned Main application, it aims at a further advantageous embodiment of the Invention after the main application, in particular an avoidance of aforementioned congestion effects due to a closed flow channel.

Die Lösung dieser Aufgabe ergibt sich aus den Merkmalen des Patentanspruches 1: Demzufolge sind die Luftleitelemente als flossenartige Stabilisatoren ausgebildet, die sich in Umfangsrichtung nur über einen Bereich von 1 % bis 40 % der Schaufelteilung erstrecken. Die Luftleitelemente belassen somit zwischen zwei Schaufeln und der Nabe einen offenen Strömungskanal, bei welchem die Nabenströmung und die Schaufelströmung kontrolliert geführt werden. Die Stabilisatoren im Schaufelwurzelbereich bewirken auf der Saugseite, der Schaufeln eine Trennung von Naben- und Schaufelströmung und verhindern eine Ablösung der Strömung sowie eine schädliche Wirbelbildung.The solution to this problem results from the features of the claim 1: As a result, the air guiding elements are considered fin-like Stabilizers formed, which are only in the circumferential direction Range from 1% to 40% of the blade pitch. The air control elements leave one between two blades and the hub open flow channel, in which the hub flow and Blade flow are controlled. The stabilizers in Blade root area cause on the suction side, the blades a Separation of hub and blade flow and prevent separation the flow as well as a harmful vortex formation.

Ähnliche flossenartige Luftleitelemente sind an sich bekannt, und zwar als sogenannte Grenzschichtzäune aus der DE 26 14 318 C2 oder als sogenannte Hilfsflügel aus der DE 27 56 880 C2. Allerdings sind diese Grenzschichtzäune bzw. Hilfsflügel nach dem Stand der Technik im radial äußersten Bereich der Schaufeln, das heißt im Schaufelblattspitzenbereich angeordnet. Diese Grenzschichtzäune sollen der Strömung einerseits Energie zuführen und andererseits eine Umströmung der Schaufelspitzen (von der Druck- zur Saugseite) verhindern. Dem gegenüber sind die erfindungsgemäßen Stabilisatoren im nabennahen Bereich, das heißt im Schaufelwurzelbereich angeordnet.Similar fin-like air guiding elements are known per se, namely as so-called boundary layer fences from DE 26 14 318 C2 or as so-called auxiliary wing from DE 27 56 880 C2. However, these are Border layer fences or auxiliary wings according to the prior art in the radial outermost area of the blades, that is in the blade tip area arranged. These boundary layer fences are supposed to flow on the one hand Supply energy and on the other hand a flow around the blade tips Prevent (from the pressure side to the suction side). They are opposite Stabilizers according to the invention in the vicinity of the hub, that is in the Blade root area arranged.

Nach einer weiteren Ausgestaltung der Erfindung gemäß Anspruch 2 nimmt die umfangseitige Erstreckung der Stabilisatoren in Luftströmungsrichtung zu - damit sind die Stabilisatoren an den Dickenzuwachs der Grenzschichtströmung bzw. der Wirbelbildung angepasst. Dies gilt insbesondere für die Weiterbildung nach Anspruch 3.According to a further embodiment of the invention according to claim 2 takes the circumferential extension of the stabilizers in the direction of air flow too - so are the stabilizers at the thickness increase of the boundary layer flow or adapted to the formation of eddies. This applies in particular to the Further training according to claim 3.

Nach weiteren vorteilhaften Ausbildungen der Erfindung entspricht die Länge der Stabilisatoren, in Luftströmungsrichtung gesehen, der Länge der Axialschaufeln, wobei die Vorderkante der Stabilisatoren etwas gegenüber der Schaufelvorderkante in Strömungsrichtung versetzt sein kann. According to further advantageous embodiments of the invention, the Length of the stabilizers, as seen in the direction of air flow, the length of the Axial blades, with the front edge of the stabilizers slightly opposite the blade leading edge can be offset in the flow direction.

Vorzugsweise ist die Fläche der Stabilisatoren in radialer Richtung leicht nach außen gekrümmt, das heißt leicht konkav ausgebildet. Auch diese Maßnahme trägt dem Verlauf der Strömung im Schaufelwurzelbereich Rechnung.The area of the stabilizers is preferably light in the radial direction curved outwards, that is, slightly concave. This too Measure takes the course of the flow in the blade root area Bill.

Gemäß Anspruch 7 ist es vorteilhaft, wenn die Stabilisatoren in einem radialen Bereich von 0 bis 40 % der Schaufelhöhe H, vorzugsweise von 0 bis 20 % angeordnet sind. In diesem Bereich kann die Nabenströmung und die Strömung an der Schaufelwurzel am effektivsten beeinflußt werden.According to claim 7, it is advantageous if the stabilizers in one radial range from 0 to 40% of the blade height H, preferably from 0 up to 20% are arranged. In this area the hub flow and the flow at the blade root can be most effectively influenced.

In weiterer Ausbildung der Erfindung gemäß Anspruch 8 weist die Nabe in ihrem inneren Bereich eine Flüssigkeitsreibungskupplung auf, die an ihrer Frontseite radial ausgerichtete Kühlrippen aufweist. Letztere erzeugen eine im wesentlichen radial ausgerichtete Luftströmung, eine sog. Kühlluftströmung.In a further embodiment of the invention according to claim 8, the hub in a fluid friction clutch on its inner area, which on its Front has radially aligned cooling fins. The latter generate one essentially radially oriented air flow, a so-called cooling air flow.

Gemäß einer Weiterbildung nach Anspruch 9 sind jedem Stabilisator Radialschaufelemente zugeordnet, das heißt sogenannte Strömungsteiler nach der Hauptanmeldung. Letztere greifen mit ihrer Vorderkante in die radial ausgerichtete Kühlluftströmung ein und lenken diese relativ verlustarm auf die Druckseite der Schaufeln, das heißt in den Bereich der Nabenrampe um.According to a development according to claim 9, each stabilizer Assigned radial blade elements, that is, so-called flow dividers after the main registration. The latter reach into the front edge radially oriented cooling air flow and steer this relatively low loss on the pressure side of the blades, i.e. in the area of the hub ramp around.

Nach einer Weiterbildung gemäß Anspruch 10 bilden die äußeren Flächen des Radialschaufelelementes und der Nabenrampe eine gemeinsame Fläche, so daß ein günstiger Strömungsverlauf im Nabenbereich erreicht wird.According to a development according to claim 10, the outer surfaces of the radial blade element and the hub ramp a common one Area so that a favorable flow in the hub area is achieved becomes.

Nach einer Weiterbildung gemäß Anspruch 11 gehen die Flächen des Stabilisators, des Radialschaufelelementes und der Nabenrampe ineinander über, so daß die Schaufelwurzel druck- und saugseitig von einer gemeinsamen Fläche umgeben ist, die eine besonders verlustarme Strömung erzeugt. According to a further development according to claim 11, the areas of the Stabilizer, the radial blade element and the hub ramp into each other over, so that the blade root pressure and suction side of one common area is surrounded, which is a particularly low loss Flow generated.

Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden im Folgenden näher beschrieben. Es zeigen

Fig. 1
den Lüfter in einer perspektivischen Ansicht von vorn,
Fig. 2
den Lüfter in einer Seitenansicht,
Fig. 3
den Lüfter in einer Ansicht von vorne,
Fig. 4
den Lüfter in einer Ansicht von hinten,
Fig. 5
einen Axialschnitt durch den Lüfter in der Ebene V - V,
Fig. 6
einen Axialschnitt durch den Lüfter in der Ebene VI - VI,
Fig. 7
eine vergrößerte Darstellung des Nabenbereiches und
Fig. 8
eine weitere Ausführungsform der Stabilisatoren, integriert mit Strömungsteiler.
Exemplary embodiments of the invention are shown in the drawings and are described in more detail below. Show it
Fig. 1
the fan in a perspective view from the front,
Fig. 2
the fan in a side view,
Fig. 3
the fan in a view from the front,
Fig. 4
the fan in a view from behind,
Fig. 5
an axial section through the fan in the plane V - V,
Fig. 6
an axial section through the fan in the plane VI - VI,
Fig. 7
an enlarged view of the hub area and
Fig. 8
a further embodiment of the stabilizers, integrated with flow dividers.

Fig. 1 zeigt einen Axiallüfter 1 mit acht im wesentlichen radial ausgerichteten Lüfterschaufeln 2, die auf einer Nabe 3 befestigt sind. Dieser Lüfter 1 bzw. dessen Nabe 3 ist auf einer Flüssigkeitsreibungskupplung 4 mit radial verlaufenden Kühlrippen 4' befestigt, die den Lüfter 1 in Richtung des Pfeiles A antreibt. Im Bereich der Nabe 3 sind Stabilisatoren 5 und Radialschaufelelemente 6 angeordnet. 1 shows an axial fan 1 with eight substantially radially oriented fan blades 2, which are fastened on a hub 3. This fan 1 or its hub 3 is fastened on a fluid friction clutch 4 with radially extending cooling fins 4 ′, which drives the fan 1 in the direction of arrow A. Stabilizers 5 and radial blade elements 6 are arranged in the area of the hub 3.

Fig. 2 zeigt eine Seitenansicht des Lüfters 1 mit einer Ansicht auf die Schaufel 2 in Richtung deren radialer Längsachse. Diese Schaufel 2 weist eine Vorderkante bzw. Anströmkante 7, eine Hinter- bzw. Abströmkante 8 sowie eine Saugseite 9 und eine Druckseite 10 auf. Auf der Saugseite 9 ist der flossenartig ausgebildete Stabilisator 5 angeordnet, der eine äußere Begrenzungslinie 11 und eine innere Begrenzungslinie 12 (an der Verbindungsstelle mit der Schaufel 2) aufweist. Die umfangseitige Erstreckung s des Stabilisators 5 nimmt von der Anströmseite (s1) zur Abströmseite (s2) hin zu, d. h. s2 > s1. Die Länge I des Stabilisators 5 entspricht im wesentlichen der Schaufellänge L, wobei die Vorderkante 13 des Stabilisators 5 gegenüber der Schaufelvorderkante 7 etwas zurückversetzt ist, während die Hinterkante 14 etwa bündig mit der Hinterkante 8 der Schaufel abschließt. Bei einem bevorzugten Ausführungsbeispiel kann die Länge L ca. 175 mm betragen. Fig. 2 shows a side view of the fan 1 with a view of the blade 2 in the direction of its radial longitudinal axis. This blade 2 has a leading edge or leading edge 7, a trailing or trailing edge 8 and a suction side 9 and a pressure side 10. Arranged on the suction side 9 is the fin-like stabilizer 5, which has an outer boundary line 11 and an inner boundary line 12 (at the connection point with the blade 2). The circumferential extension s of the stabilizer 5 increases from the inflow side (s 1 ) to the outflow side (s 2 ), ie s 2 > s 1. The length I of the stabilizer 5 essentially corresponds to the blade length L, the front edge 13 of the stabilizer 5 is set back somewhat from the front edge 7 of the blade, while the rear edge 14 is approximately flush with the rear edge 8 of the blade. In a preferred embodiment, the length L can be approximately 175 mm.

Das Maß s2 beträgt bei einer Schaufelteilung von t = π · D : Z = π · 330 : 8 ≈ 130 mm, ca. 25 - 30 mm, d. h. etwa 20 % der Schaufelteilung im Nabenbereich (Nabendurchmesser DN = 330).With a blade pitch of t = π · D: Z = π · 330: 8 ≈ 130 mm, dimension s 2 is approx. 25 - 30 mm, ie approximately 20% of the blade pitch in the hub area (hub diameter D N = 330).

Im frontseitigen Bereich der Nabe 3 ist in Strömungsrichtung (das heißt entgegen der Drehrichtung A) vor der Schaufelvorderkante 7 das Radialschaufelelement 6 angeordnet, welches in der Hauptanmeldung auch als Strömungsteiler bezeichnet wurde. Dieses Radialschaufelelement überdeckt in axialer Richtung den vorderen Teil der Flüssigkeitsreibungskupplung 4, während die Vorderkante 15 der Nabe 3 in diesem Bereich etwas zurückgesetzt ist.In the front area of the hub 3 is in the direction of flow (that is against the direction of rotation A) in front of the blade leading edge 7, the radial blade element 6 arranged, which in the main application also as Flow divider was called. This radial blade element covers the front part of the fluid friction clutch 4 in the axial direction, while the front edge 15 of the hub 3 is somewhat in this area is reset.

Fig. 3 zeigt eine Ansicht des Lüfters 1 von vorn, das heißt in Richtung der Drehachse M. Die Lüfterblätter 2 weisen eine radiale Erstreckung bzw. Höhe H auf. Innerhalb eines radialen Bereiches von Null bis maximal 40 % der Schaufelhöhe H sind die Stabilisatoren 5 angeordnet, die leicht konkav ausgebildet sind, daß heißt in radialer Richtung nach außen gekrümmt. Bei dem bevorzugten Ausführungsbeispiel beträgt die Schaufelhöhe H = 210 mm bei dem bereits erwähnten Nabendurchmesser DN = 330 mm. Der Stabilisator erstreckt sich radial über einen Bereich von etwa Null bis r1 = 30 mm, d. h. 14 % der Schaufelhöhe H. Aus dieser Darstellung der Stabilisatoren 5 wird auch erkennbar, daß diese in axialer Richtung (in Richtung der Rotationsachse M) entformbar sind. Dies ist insbesondere dann von Vorteil, wenn der Lüfter als Kunststoffteil gespritzt oder als Gußteil hergestellt wird. Die gestrichelten Linien 16 zeigen den Verlauf der Nabenrampe auf der Rückseite (Druckseite) der Schaufel 2. 3 shows a view of the fan 1 from the front, that is, in the direction of the axis of rotation M. The fan blades 2 have a radial extension or height H. Within a radial range from zero to a maximum of 40% of the blade height H, the stabilizers 5 are arranged, which are slightly concave, that is curved outward in the radial direction. In the preferred embodiment, the blade height H = 210 mm with the hub diameter D N = 330 mm already mentioned. The stabilizer extends radially over a range from approximately zero to r 1 = 30 mm, ie 14% of the blade height H. From this illustration of the stabilizers 5 it can also be seen that they can be demolded in the axial direction (in the direction of the axis of rotation M). This is particularly advantageous if the fan is injection molded as a plastic part or manufactured as a cast part. The dashed lines 16 show the course of the hub ramp on the back (pressure side) of the blade 2.

Fig. 4 zeigt den Lüfter 1 in einer Ansicht von hinten, das heißt in Richtung der Rotationsachse M. Man blickt also auf die Druckseite 10 der Lüfterschaufeln 2: Dort ist im Naben- bzw. Schaufelwurzelbereich die Nabenrampe durch die Linie 16 schematisch angedeutet. Mit der Bezugsziffer 5' ist der Teil der Stabilisatoren 5 bezeichnet, der über die Hinterkante 8 der Lüfterblätter 2 hinaus steht. 4 shows the fan 1 in a view from the rear, that is to say in the direction of the axis of rotation M. One therefore looks at the pressure side 10 of the fan blades 2: there the hub ramp is indicated schematically by the line 16 in the hub or blade root region. The reference number 5 'denotes the part of the stabilizers 5 which projects beyond the rear edge 8 of the fan blades 2.

Fig. 5 zeigt einen Axialschnitt durch den Lüfter 1 entlang der Linie V-V in Fig. 4. Das Lüfterblatt 2, welches als Kunststoffteil gespritzt ist, weist in seinem linken, das heißt saugseitigen Bereich den etwa rechtwinklig abstehenden Stabilisator 5 auf, der an die Lüfterschaufel 2 angespritzt ist. Auch hier wird die axiale Entformbarkeit der Stabilisatoren 5 deutlich. Auf der rechten Seite der Schaufel ist mit der Bezugsziffer 16 die Oberkante der Nabenrampe markiert. 5 shows an axial section through the fan 1 along the line VV in FIG. 4. The fan blade 2, which is injection molded as a plastic part, has in its left, that is to say the suction side region, the stabilizer 5 which projects approximately at right angles and which is connected to the fan blade 2 is molded. The axial demoldability of the stabilizers 5 is also evident here. The upper edge of the hub ramp is marked with the reference number 16 on the right side of the blade.

Fig. 6 zeigt einen Schnitt entlang der Linie VI-VI in Fig. 4 mit Blickrichtung auf die Saugseite 9 der Schaufel 2. Auch hier wird für den geschnittenen Bereich 5' des Stabilisators 5 die axiale Entformbarkeit deutlich. FIG. 6 shows a section along the line VI-VI in FIG. 4 looking towards the suction side 9 of the blade 2. Here too, the axial demoldability is clear for the cut area 5 ′ of the stabilizer 5.

Fig. 7 zeigt eine vergrößerte Darstellung, das heißt eine Teilansicht der Fig. 1 für den Schaufelwurzelbereich. Man erkennt hier deutlich nochmals die Flächen der Stabilisatoren 5, der Radialschaufelelemente bzw. Strömungsteiler 6 sowie der Nabenrampe 16. Die Flächenelemente 5 und 6 sind bei dieser Ausführungsform durch die Vorderkante 7 der Schaufel 2 unterbrochen. FIG. 7 shows an enlarged view, that is to say a partial view of FIG. 1 for the blade root region. The surfaces of the stabilizers 5, the radial blade elements or flow dividers 6 and the hub ramp 16 can clearly be seen here. The surface elements 5 and 6 are interrupted in this embodiment by the front edge 7 of the blade 2.

Fig. 8 zeigt ein weiteres Ausführungsbeispiel, bei welchem die außenliegenden Flächen 5a und 6a der Stabilisatoren 5 und der Radialschaufelelemente 6 derart ineinander integriert sind, daß sie eine gemeinsame, übergangslose Fläche mit einer gemeinsamen Vorderkante 17 bilden. Das Flächenelement 6a geht also einerseits auf der Saugseite der Schaufel 2 in das Flächenelement 5a und andererseits auf der Druckseite der Schaufel in das Flächenelement 16 der Nabenrampe über. Dadurch wird eine verlustarme Umströmung der Schaufelwurzel, das heißt im Nabenbereich erzielt, wobei die im wesentlichen radial ausgerichtete Kühlluftströmung der Flüssigkeitsreibungskupplung mit der Schaufelumströmung kontrolliert zusammengeführt wird. Damit kann die Leistung dieses Lüfters, insbesondere in Verbindung mit der Kupplung verbessert werden. 8 shows a further exemplary embodiment in which the outer surfaces 5a and 6a of the stabilizers 5 and the radial blade elements 6 are integrated into one another in such a way that they form a common, seamless surface with a common front edge 17. The surface element 6a therefore merges with the surface element 5a on the suction side of the blade 2 and with the surface element 16 of the hub ramp on the pressure side of the blade. This results in a low-loss flow around the blade root, that is to say in the hub region, the essentially radially oriented cooling air flow of the fluid friction clutch being brought together in a controlled manner with the flow around the blade. This can improve the performance of this fan, especially in connection with the clutch.

Claims (11)

Lüfter mit Axialschaufeln, insbesondere für Kühler von Kraftfahrzeugen, wobei die Axialschaufeln (2) auf einer Lüfternabe (3) befestigt sind und im Bereich der Nabe und im wesentlichen auf der Saugseite (9) der Axialschaufeln (2) Luftleitelemente angeordnet sind (gemäß Anspruch 1 oder 2 oder Hauptanmeldung 199 29 978.1), dadurch gekennzeichnet, daß die Luftleitelemente als flossenartige Stabilisatoren (5, 5a) ausgebildet sind, deren Erstreckung s in Umfangsrichtung im Bereich von 0,01 t ≤ s ≤ 0,40 t liegt, wobei t die Schaufelteilung ist.Fan with axial blades, in particular for radiators of motor vehicles, the axial blades (2) being fastened to a fan hub (3) and air guiding elements being arranged in the region of the hub and essentially on the suction side (9) of the axial blades (2) or 2 or main application 199 29 978.1), characterized in that the air guiding elements are designed as fin-like stabilizers (5, 5a), the extent of which s in the circumferential direction is in the range from 0.01 t ≤ s ≤ 0.40 t, where t is the Blade division is. Lüfter nach Anspruch 1, dadurch gekennzeichnet, daß die Erstreckung s in Axial- bzw. Luftströmungsrichtung gesehen zunimmt.Fan according to claim 1, characterized in that the extension s increases seen in the axial or air flow direction. Lüfter nach Anspruch 2, dadurch gekennzeichnet, daß die Erstreckung s im luftanströmseitigen Bereich (13) etwa 0,01 t bis 0,05 t und im luftabströmseitigen Bereich (14) bis zu 0,40 t beträgt.Fan according to Claim 2, characterized in that the extension s in the area on the air inflow side (13) is approximately 0.01 t to 0.05 t and in the area (14) on the air outflow side up to 0.40 t. Lüfter nach Anspruch 1 oder 2 oder 3, dadurch gekennzeichnet, daß die Länge I der Stabilisatoren (5) etwa der Länge L der Axialschaufeln (2) entspricht.Fan according to claim 1 or 2 or 3, characterized in that the length I of the stabilizers (5) corresponds approximately to the length L of the axial blades (2). Lüfter nach Anspruch 4, dadurch gekennzeichnet, daß die Vorderkante (13) der Stabilisatoren (5) gegenüber der Vorderkante (7) der Schaufeln (2) in Luftströmungsrichtung versetzt ist.Fan according to claim 4, characterized in that the front edge (13) of the stabilizers (5) is offset in relation to the front edge (7) of the blades (2) in the direction of air flow. Lüfter nach Anspruch 4, dadurch gekennzeichnet, daß die Hinterkante (14) der Stabilisatoren (5) mit der Hinterkante (8) der Schaufel (2) abschließt. Fan according to claim 4, characterized in that the rear edge (14) of the stabilizers (5) ends with the rear edge (8) of the blade (2). Lüfter nach einem der vorhergehenden Ansprüche 1-6, dadurch gekennzeichnet, daß die Stabilisatoren (5, 5a) in einem radialen Bereich r von 0 ≤ r ≤ 0,40 H angeordnet sind, wobei H die radiale Erstreckung (Höhe) der Schaufel (2) ist.Fan according to one of the preceding claims 1-6, characterized in that the stabilizers (5, 5a) are arranged in a radial range r of 0 ≤ r ≤ 0.40 H, where H is the radial extension (height) of the blade (2 ) is. Lüfter nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß innerhalb der Nabe (3) eine Flüssigkeitsreibunskupplung (4) mit radialverlaufenden Kühlrippen (4') angeordnet ist.Fan according to one of the preceding claims, characterized in that a fluid friction clutch (4) with radially extending cooling fins (4 ') is arranged within the hub (3). Lüfter nach Anspruch 8, dadurch gekennzeichnet, daß jedem Stabilisator (5) ein Radialschaufelelement (6) (Strömungsteiler nach der Hauptanmeldung) zugeordnet ist, welches in Drehrichtung A des Lüfters (1) hinter dem Stabilisator (5) und in radialer Richtung innerhalb des Stabilisators (5) angeordnet ist.Fan according to claim 8, characterized in that each stabilizer (5) is assigned a radial blade element (6) (flow divider after the main application), which in the direction of rotation A of the fan (1) behind the stabilizer (5) and in the radial direction within the stabilizer (5) is arranged. Lüfter nach Anspruch 9, dadurch gekennzeichnet, daß die äußere Fläche des Radialschaufelelementes (6) in die Nabenrampe (16) auf der Druckseite (10) der Schaufel (2) übergeht.Fan according to claim 9, characterized in that the outer surface of the radial blade element (6) merges into the hub ramp (16) on the pressure side (10) of the blade (2). Lüfter nach Anspruch 9 oder 10, dadurch gekennzeichnet, daß die Flächen (5a, 6a) von Stabilisator (5) und Radialschaufelelement (6) ineinander übergehen und eine durchgehende Vorderkante (17) aufweisen.Fan according to claim 9 or 10, characterized in that the surfaces (5a, 6a) of stabilizer (5) and radial blade element (6) merge into one another and have a continuous front edge (17).
EP01125014A 2001-01-02 2001-10-20 Fan with axial blades Expired - Lifetime EP1219837B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001100064 DE10100064A1 (en) 1999-06-30 2001-01-02 Fan with axial blades, particularly for read vehicle radiator, has axial blades fixed to nave, with air guide components arranged in nave area and on suction side of axial blades, air guide components being formed as fin-type stabilizers
DE10100064 2001-01-02

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EP1219837A2 true EP1219837A2 (en) 2002-07-03
EP1219837A3 EP1219837A3 (en) 2003-08-13
EP1219837B1 EP1219837B1 (en) 2006-08-09

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AT (1) ATE335931T1 (en)
DE (1) DE50110684D1 (en)
ES (1) ES2269274T3 (en)

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WO2005035978A1 (en) * 2003-10-10 2005-04-21 Repower Systems Ag Rotor blade for a wind power station
WO2007065434A1 (en) * 2005-12-05 2007-06-14 Lm Glasfiber A/S Blade for a wind turbine rotor
WO2012072779A1 (en) * 2010-12-01 2012-06-07 Behr Gmbh & Co. Kg Axial fan
WO2013060358A1 (en) * 2011-10-25 2013-05-02 Ebm-Papst Mulfingen Gmbh & Co. Kg Axial ventilator wheel
CN104114857A (en) * 2012-02-17 2014-10-22 Lmwp专利控股有限公司 Wind turbine blade having a shaped stall fence or flow diverter
DE102014204043A1 (en) 2014-03-05 2015-09-10 MAHLE Behr GmbH & Co. KG Fan wheel of an axial fan
EP2333346B1 (en) * 2009-11-25 2017-02-15 MAHLE Behr GmbH & Co. KG Ventilator for a combustion engine
CN111927825A (en) * 2020-07-24 2020-11-13 东风马勒热系统有限公司 Open fan

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CN104114857A (en) * 2012-02-17 2014-10-22 Lmwp专利控股有限公司 Wind turbine blade having a shaped stall fence or flow diverter
DE102014204043A1 (en) 2014-03-05 2015-09-10 MAHLE Behr GmbH & Co. KG Fan wheel of an axial fan
WO2015132077A1 (en) * 2014-03-05 2015-09-11 MAHLE Behr GmbH & Co. KG Fan wheel of an axial fan
CN111927825A (en) * 2020-07-24 2020-11-13 东风马勒热系统有限公司 Open fan
CN111927825B (en) * 2020-07-24 2022-06-28 东风马勒热系统有限公司 Open fan

Also Published As

Publication number Publication date
US6726454B2 (en) 2004-04-27
EP1219837A3 (en) 2003-08-13
ATE335931T1 (en) 2006-09-15
DE50110684D1 (en) 2006-09-21
ES2269274T3 (en) 2007-04-01
US20020085912A1 (en) 2002-07-04
EP1219837B1 (en) 2006-08-09

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