EP1219837B1 - Fan with axial blades - Google Patents

Fan with axial blades Download PDF

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Publication number
EP1219837B1
EP1219837B1 EP01125014A EP01125014A EP1219837B1 EP 1219837 B1 EP1219837 B1 EP 1219837B1 EP 01125014 A EP01125014 A EP 01125014A EP 01125014 A EP01125014 A EP 01125014A EP 1219837 B1 EP1219837 B1 EP 1219837B1
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EP
European Patent Office
Prior art keywords
fan
accordance
blade
hub
blades
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.)
Expired - Lifetime
Application number
EP01125014A
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German (de)
French (fr)
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EP1219837A3 (en
EP1219837A2 (en
Inventor
Uwe Dipl.-Ing. Blass
Christoph Dipl.-Ing. Kurdzel
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Mahle Behr GmbH and Co KG
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Behr GmbH and Co KG
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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
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Publication of EP1219837B1 publication Critical patent/EP1219837B1/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/26Rotors specially for elastic fluids
    • F04D29/32Rotors specially for elastic fluids for axial flow pumps
    • F04D29/325Rotors specially for elastic fluids for axial flow pumps for axial flow fans
    • F04D29/329Details of the hub
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/26Rotors specially for elastic fluids
    • F04D29/32Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38Blades
    • F04D29/384Blades characterised by form

Definitions

  • the invention relates to a fan with axial blades, in particular for radiator of motor vehicles according to the preamble of claim 1.
  • a fan is e.g. from any of the details of DE-C-62510, DE-A-19710608 or GB-A-2 041 103.
  • so-called air guide elements are arranged in the region of the axial and suction side of the axial blades.
  • a so-called hub ramp is provided in the pressure-side region of the axial blade.
  • the air guide elements extend over the entire blade pitch, that is, from the leading edge of an axial blade to the leading edge of an adjacent axial blade.
  • This particular embodiment of the air guide elements as shown in FIGS. 3 and 4 of the aforementioned application, thus forms between two blades a continuous surface or the wall for a closed flow channel.
  • these closed flow channels may be disadvantageous, in particular they may lead to congestion and vortex formation, that is to flow losses.
  • the task of Invention is an avoidance of the aforementioned congestion effects due to a closed flow channel.
  • the air guide elements are designed as fin-like stabilizers, which extend in the circumferential direction only over a range of 1% to 40% of the blade pitch.
  • the air guide elements thus leave between two blades and the hub an open flow channel in which the hub flow and the blade flow are controlled.
  • the stabilizers in the blade root area cause a separation of hub and blade flow on the suction side, the blades and prevent flow separation and harmful vortex formation.
  • the circumferential extension of the stabilizers in the air flow direction increases - so that the stabilizers are adapted to the increase in thickness of the boundary layer flow or vortex formation. This applies in particular to the development according to claim 3.
  • the length of the stabilizers corresponds to the length of the axial blades, wherein the front edge of the stabilizers may be slightly offset from the blade leading edge in the flow direction.
  • the surface of the stabilizers in the radial direction is slightly curved outward, that is slightly concave. This measure also takes into account the course of the flow in the blade root area.
  • the stabilizers are arranged in a radial range of 0 to 40% of the blade height H, preferably from 0 to 20%. In this area, the hub flow and flow at the blade root can be most effectively affected.
  • the hub in its inner region on a fluid friction clutch, which has on its front side radially aligned cooling fins.
  • the latter produce a substantially radially oriented air flow, a so-called. Cooling air flow.
  • radial stabilizer elements are assigned to each stabilizer, that is called flow divider after the parent application.
  • the latter engage with their leading edge in the radially directed cooling air flow and direct this relatively low loss on the pressure side of the blades, that is in the range of the hub ramp.
  • the outer surfaces of the radial blade element and the hub ramp form a common surface, so that a favorable flow pattern is achieved in the hub area.
  • the surfaces of the stabilizer, the radial blade element and the hub ramp merge into one another, so that the blade root pressure and suction side is surrounded by a common surface, which generates a particularly low-loss flow.
  • Fig. 1 shows an axial fan 1 with eight substantially radially oriented fan blades 2, which are mounted on a hub 3.
  • This fan 1 or its hub 3 is mounted on a fluid friction clutch 4 with radially extending cooling fins 4 ', which drives the fan 1 in the direction of arrow A.
  • a fluid friction clutch 4 with radially extending cooling fins 4 ', which drives the fan 1 in the direction of arrow A.
  • In the region of the hub 3 stabilizers 5 and radial blade elements 6 are arranged.
  • 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 outflow edge 8 and a suction side 9 and a pressure side 10.
  • On the suction side 9 of the fin-like stabilizer 5 is arranged, which has an outer boundary line 11 and an inner boundary line 12 (at the junction 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 substantially corresponds to the blade length L, the leading edge 13 of the stabilizer 5 relative to the blade leading edge 7 is set back slightly, while the trailing edge 14 terminates approximately flush with the trailing edge 8 of the blade.
  • the length L may be about 175 mm.
  • the radial blade element 6 is arranged in the direction of flow (ie counter to the direction of rotation A) in front of the blade leading edge 7, which was also referred to in the applicant's application DE-A-19929978 as a flow divider.
  • This radial blade element covers in the axial direction the front part of the fluid friction clutch 4, while the front edge 15 of the hub 3 is slightly set back in this area.
  • Fig. 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 extent or height H.
  • the stabilizers 5 are arranged, which are slightly concave, that is curved in the radial direction outwards.
  • the stabilizers 5 are demolded. This is particularly advantageous if the fan is injection molded as a plastic part or produced as a casting.
  • the dashed lines 16 show the course of the hub ramp on the back (pressure side) of the blade. 2
  • FIG. 4 shows the fan 1 in a view from the rear, that is to say in the direction of the rotation axis M.
  • the hub ramp is schematically indicated by the line 16 in the hub or blade root area.
  • the reference numeral 5 ' denotes the part of the stabilizers 5 which projects beyond the trailing edge 8 of the fan blades 2.
  • Fig. 5 shows an axial section through the fan 1 along the line VV in Fig. 4.
  • the fan blade 2, which is injected as a plastic part, has in its left, that is suction-side region of the approximately right-angled stabilizer 5, the fan blade 2 is injected. Again, the axial releasability of the stabilizers 5 is clear.
  • the reference numeral 16 indicates the upper edge of the hub ramp.
  • Fig. 6 shows a section along the line VI-VI in Fig. 4 with a view towards the suction side 9 of the blade 2. Again, the axial removability is clear for the cut portion 5 'of the stabilizer 5.
  • Fig. 7 shows an enlarged view, that is, a partial view of FIG. 1 for the blade root area.
  • the surfaces of the stabilizers 5, the radial vane elements or flow divider 6 and the hub ramp 16 can clearly be seen here again.
  • the surface elements 5 and 6 are interrupted in this embodiment by the front edge 7 of the vane 2.
  • Fig. 8 shows a further embodiment in which the outer surfaces 5a and 6a of the stabilizers 5 and the radial vane elements 6 are integrated with each other in such a way that they form a common, seamless surface with a common leading edge 17.
  • the surface element 6a thus passes on the one hand on the suction side of the blade 2 in the surface element 5a and on the other hand on the pressure side of the blade in the surface element 16 of the hub ramp.
  • a low-loss flow around the blade root that is achieved in the hub region, wherein the substantially radially oriented cooling air flow of the fluid friction clutch is combined with the control blade flow controlled.
  • the performance of this fan, especially in connection with the clutch can be improved.

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 dem Oberbegriff des Anspruchs 1. Ein solcher Lüfter ist z.B. aus jeder einzelmen der DE-C-62510, DE-A-19710608 oder GB-A-2 041 103 bekannt.The invention relates to a fan with axial blades, in particular for radiator of motor vehicles according to the preamble of claim 1. Such a fan is e.g. from any of the details of DE-C-62510, DE-A-19710608 or GB-A-2 041 103.

Nach der Anmeldung DE-A- 19929978 der Anmelderin 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 genannten Anmeldung 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.According to the application DE-A-19929978 of the applicant, so-called air guide elements are arranged in the region of the axial and suction side of the axial blades. In addition, a so-called hub ramp is provided in the pressure-side region of the axial blade. In a preferred embodiment, the air guide elements extend over the entire blade pitch, that is, from the leading edge of an axial blade to the leading edge of an adjacent axial blade. This particular embodiment of the air guide elements, as shown in FIGS. 3 and 4 of the aforementioned application, thus forms between two blades a continuous surface or the wall for a closed flow channel. In certain flow conditions, these closed flow channels may be disadvantageous, in particular they may lead to congestion and vortex formation, that is to flow losses.

Die Aufgabe der Erfindung ist eine Vermeidung der vorgenannten Staueffekte infolge eines geschlossenen Strömungskanals.The task of Invention is an avoidance of the 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 arises from the features of claim 1: Accordingly, the air guide elements are designed as fin-like stabilizers, which extend in the circumferential direction only over a range of 1% to 40% of the blade pitch. The air guide elements thus leave between two blades and the hub an open flow channel in which the hub flow and the blade flow are controlled. The stabilizers in the blade root area cause a separation of hub and blade flow on the suction side, the blades and prevent flow separation and 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 guide elements are known per se, 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 prior art boundary layer fences are located in the radially outermost region of the vanes, that is, in the airfoil tip region. On the one hand, these boundary layer fences should supply energy to the flow and, on the other hand, prevent flow around the blade tips (from the pressure side to the suction side). In contrast, the stabilizers according to the invention in the region near the hub, that is arranged in the blade root area.

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, the circumferential extension of the stabilizers in the air flow direction increases - so that the stabilizers are adapted to the increase in thickness of the boundary layer flow or vortex formation. This applies in particular to the development 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, seen in the direction of air flow, corresponds to the length of the axial blades, wherein the front edge of the stabilizers may be slightly offset from the blade leading edge 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.Preferably, the surface of the stabilizers in the radial direction is slightly curved outward, that is slightly concave. This measure also takes into account the course of the flow in the blade root area.

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 are arranged in a radial range of 0 to 40% of the blade height H, preferably from 0 to 20%. In this area, the hub flow and flow at the blade root can be most effectively affected.

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 its inner region on a fluid friction clutch, which has on its front side radially aligned cooling fins. The latter produce a substantially 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 radial stabilizer elements are assigned to each stabilizer, that is called flow divider after the parent application. The latter engage with their leading edge in the radially directed cooling air flow and direct this relatively low loss on the pressure side of the blades, that is in the range of the hub ramp.

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 form a common surface, so that a favorable flow pattern is achieved in the hub area.

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 development according to claim 11, the surfaces of the stabilizer, the radial blade element and the hub ramp merge into one another, so that the blade root pressure and suction side is surrounded by a common surface, which generates a particularly low-loss flow.

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.
Embodiments of the invention are illustrated in the drawings and will be 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 the back,
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
Another embodiment of the stabilizers, integrated with flow divider.

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. Fig. 1 shows an axial fan 1 with eight substantially radially oriented fan blades 2, which are mounted on a hub 3. This fan 1 or its hub 3 is mounted on a fluid friction clutch 4 with radially extending cooling fins 4 ', which drives the fan 1 in the direction of arrow A. In the region of the hub 3 stabilizers 5 and radial blade elements 6 are arranged.

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 outflow edge 8 and a suction side 9 and a pressure side 10. On the suction side 9 of the fin-like stabilizer 5 is arranged, which has an outer boundary line 11 and an inner boundary line 12 (at the junction 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 substantially corresponds to the blade length L, the leading edge 13 of the stabilizer 5 relative to the blade leading edge 7 is set back slightly, while the trailing edge 14 terminates approximately flush with the trailing edge 8 of the blade. In a preferred embodiment, the length L may be about 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).The dimension s 2 is at a blade pitch of t = π · D: Z = π · 330: 8 ≈ 130 mm, about 25 - 30 mm, ie about 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 Anmeldung DE-A-19929978 der Anmelderin 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 region of the hub 3, the radial blade element 6 is arranged in the direction of flow (ie counter to the direction of rotation A) in front of the blade leading edge 7, which was also referred to in the applicant's application DE-A-19929978 as a flow divider. This radial blade element covers in the axial direction the front part of the fluid friction clutch 4, while the front edge 15 of the hub 3 is slightly set back in this area.

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. Fig. 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 extent 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 in the radial direction outwards. In the preferred embodiment, the blade height H = 210 mm at the aforementioned hub diameter D N = 330 mm. The stabilizer extends radially over a range of about zero to r 1 = 30 mm, ie 14% of the blade height H. From this representation of the stabilizers 5 is also seen that these in the axial direction (in the direction of the rotation axis M) are demolded. This is particularly advantageous if the fan is injection molded as a plastic part or produced as a casting. 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. FIG. 4 shows the fan 1 in a view from the rear, that is to say in the direction of the rotation axis M. Thus, one looks at the pressure side 10 of the fan blades 2: There, the hub ramp is schematically indicated by the line 16 in the hub or blade root area. The reference numeral 5 'denotes the part of the stabilizers 5 which projects beyond the trailing 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. Fig. 5 shows an axial section through the fan 1 along the line VV in Fig. 4. The fan blade 2, which is injected as a plastic part, has in its left, that is suction-side region of the approximately right-angled stabilizer 5, the fan blade 2 is injected. Again, the axial releasability of the stabilizers 5 is clear. On the right side of the bucket, the reference numeral 16 indicates the upper edge of the hub ramp.

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 with a view towards the suction side 9 of the blade 2. Again, the axial removability is clear for the cut portion 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, a partial view of FIG. 1 for the blade root area. The surfaces of the stabilizers 5, the radial vane elements or flow divider 6 and the hub ramp 16 can clearly be seen here again. The surface elements 5 and 6 are interrupted in this embodiment by the front edge 7 of the vane 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. Fig. 8 shows a further embodiment in which the outer surfaces 5a and 6a of the stabilizers 5 and the radial vane elements 6 are integrated with each other in such a way that they form a common, seamless surface with a common leading edge 17. The surface element 6a thus passes on the one hand on the suction side of the blade 2 in the surface element 5a and on the other hand on the pressure side of the blade in the surface element 16 of the hub ramp. As a result, a low-loss flow around the blade root, that is achieved in the hub region, wherein the substantially radially oriented cooling air flow of the fluid friction clutch is combined with the control blade flow controlled. Thus, the performance of this fan, especially in connection with the clutch can be improved.

Claims (12)

  1. A fan with axial blades, in particular for radiators of motor vehicles, the axial blades (2) being fixed on to a fan hub (3),
    characterised in that
    positioned in the area of the hub and essentially on the intake side (9) of the axial blades (2) are air ducting elements, said air ducting elements being designed as fin-like stabilisers (5, 5a) the peripheral extension (s) of which lies in the area of 0.01 ≤ s ≤ 0.4 t, (t) being the distance between the front edge of one axial blade and the front edge of a neighbouring axial blade.
  2. A fan in accordance with claim 1,
    characterised in that
    the extension (s) increases axially or in the direction of air flow.
  3. A fan in accordance with claim 2,
    characterised in that
    the extension (s) is approximately 0.01 t to 0.05 t in the air inflow side area (13) and up to approximately 0.04 t in the air outflow side area.
  4. A fan in accordance with claim 1 or 2 or 3,
    characterised in that
    the length (1) of the stabilisers (5) corresponds approximately to the length (L) of the axial blades (2).
  5. A fan in accordance with claim 4,
    characterised in that
    the front edges (13) of the stabilisers (5) are offset in the direction of air flow in relation to the front edges (7) of the blades (2).
  6. A fan in accordance with claim 4,
    characterised in that
    the rear edges (14) of the stabilisers (5) end with the rear edges (8) of the blades (2).
  7. A fan in accordance with one of the preceding claims 1 to 6,
    characterised in that
    the stabilisers (5, 5a) are positioned in a radial area (r) of 0 ≤ r ≤ 0.40 H, H being the radial extension (height) of the blade (2).
  8. A fan in accordance with one of the preceding claims,
    characterised in that
    positioned inside the hub (3) is a fluid friction coupling (4) with radially running cooling ribs (4').
  9. A fan in accordance with claim 8,
    characterised in that
    assigned to each stabiliser (5) is a radial blade element (6) which is positioned behind the stabiliser in direction of rotation (A) of the fan (1) and inside the stabiliser (5) in radial direction.
  10. A fan in accordance with claim 9,
    characterised in that
    the outer face of the radial blade element (6) turns into the hub incline (16) on the output side (10) of the blade (2).
  11. A fan in accordance with claim 9 or 10,
    characterised in that
    the faces (5a, 6a) of the stabiliser (5) and the radial blade element (6) run into one another and have a continuous front edge (17).
  12. A fan in accordance with one of the preceding claims,
    characterised in that
    provided on the output side of the axial blades is a hub incline which increases against the direction of rotation, upstream of which in the direction of air flow are positioned the air ducting elements.
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

Publications (3)

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

Family

ID=7669690

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01125014A Expired - Lifetime EP1219837B1 (en) 2001-01-02 2001-10-20 Fan with axial blades

Country Status (5)

Country Link
US (1) US6726454B2 (en)
EP (1) EP1219837B1 (en)
AT (1) ATE335931T1 (en)
DE (1) DE50110684D1 (en)
ES (1) ES2269274T3 (en)

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DE102020207914A1 (en) 2020-06-25 2021-12-30 Ziehl-Abegg Se Fan as well as blades and impellers for a fan

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CN104114857B (en) * 2012-02-17 2017-03-08 Lm Wp 专利控股有限公司 There is the wind turbine blade of setting stall fence or flow diverter
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WO2012049220A1 (en) 2010-10-12 2012-04-19 Behr Gmbh & Co. Kg Fan comprising fan blades
US9447791B2 (en) 2010-10-12 2016-09-20 Mahle International Gmbh Fan comprising fan blades
DE102020207914A1 (en) 2020-06-25 2021-12-30 Ziehl-Abegg Se Fan as well as blades and impellers for a fan
WO2021259429A1 (en) 2020-06-25 2021-12-30 Ziehl-Abegg Se Fan, and blade and impeller for a fan

Also Published As

Publication number Publication date
US6726454B2 (en) 2004-04-27
EP1219837A3 (en) 2003-08-13
US20020085912A1 (en) 2002-07-04
ES2269274T3 (en) 2007-04-01
ATE335931T1 (en) 2006-09-15
EP1219837A2 (en) 2002-07-03
DE50110684D1 (en) 2006-09-21

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