EP0111845B1 - Arrangement of a twin fan in a housing - Google Patents

Arrangement of a twin fan in a housing Download PDF

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Publication number
EP0111845B1
EP0111845B1 EP83112391A EP83112391A EP0111845B1 EP 0111845 B1 EP0111845 B1 EP 0111845B1 EP 83112391 A EP83112391 A EP 83112391A EP 83112391 A EP83112391 A EP 83112391A EP 0111845 B1 EP0111845 B1 EP 0111845B1
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EP
European Patent Office
Prior art keywords
belt
fan
webs
arrangement
mounting element
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
Application number
EP83112391A
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German (de)
French (fr)
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EP0111845A1 (en
Inventor
Peter Engel
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.)
Audi AG
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Audi AG
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Filing date
Publication date
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Publication of EP0111845A1 publication Critical patent/EP0111845A1/en
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Publication of EP0111845B1 publication Critical patent/EP0111845B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers

Definitions

  • the invention relates to an arrangement of a double fan in a receiving part according to the preamble of claim 1.
  • a fan is driven by the internal combustion engine;
  • the second fan is driven by a belt which engages with pulleys attached to the two fans.
  • a belt tensioner is provided to generate the desired '* - belt tension.
  • the invention has for its object to effect belt tension in a generic arrangement of a double fan with simple means.
  • the object is achieved in that, when the belt is mounted, the webs of the receiving part which support the bearings of the axes of rotation of the pulleys are elastically deformable in such a way that the distance between the axes of rotation on the belt pulleys is less than when the belt is removed when the belt is installed.
  • the proposed arrangement ensures that the required belt pretension is generated solely by the receiving part and that a separate belt tensioner is not required.
  • the adjustment of the belt tension can also be omitted.
  • the pretension of the belt is given by design and is essentially only influenced by the tolerance of the belt. If a corresponding length tolerance of the belt is specified, sufficient belt tension is ensured over the entire running time of the belt, since the known belts used for this purpose (mostly V-belts) lengthen only very slightly during the entire running time and therefore have an effective influence on the belt tension to take.
  • the individual elements of the receiving part which can be elastically deformed in order to achieve a tension can be produced directly through the areas of the receiving part which are not defined on other body parts if the latter consists of a material with corresponding elastic properties (e.g. sheet metal or plastic). However, it is also possible to specifically design certain sections of the receiving part for this purpose or to create an area suitable for elastic deformation by interposing a suitable component made of another material.
  • the claim 2 characterizes a particularly advantageous embodiment of the invention for creating elastically deformable elements of the receiving part.
  • the proposed webs are particularly suitable for this, since they are located near the axes of rotation of the pulleys and, moreover, are not fixed to other vehicle parts like the air guide screed forming the receiving part.
  • the elastic deformation of the webs ensures that the axes of rotation of the pulleys move towards each other at an acute angle. Since this is only necessary to a small extent to achieve the desired belt pretension, this has hardly any influence on the drive; especially not if a V-belt is used.
  • the air control scoop can be composed of several parts and made of different materials (e.g. plastic). It is particularly advantageous if the air guide scraper and the webs are made in one piece as a pressed sheet metal part. This training ensures a particularly cost-effective production and also provides sufficient elastic properties through the material used for the prestressing. Tests have shown that - apart from the distance of the axis of rotation - no special measures are necessary to ensure the desired belt tension for a long running time.
  • An air guide 3 shown in Fig. 1 for attachment to the radiator of a motor vehicle is equipped with two fans 5 and 7.
  • the air guide scoop 3 is pressed in one piece from sheet metal and is provided with fastening holes 9 at its edges.
  • the approximately rectangular inlet opening 11 is adapted approximately to the circumference of the cooler, not shown in the drawing.
  • Another feature of the air guide scoop 3 are two circular outlet openings 13 and 15, the diameter of which is slightly larger than the diameter of the associated fans 5 and 7.
  • Each fan 5 and 7 carries a pulley 17 and 19, which are connected to each other via a belt 21.
  • the fan 5 is driven directly by an electric motor 23, on the outlet shaft of which the fan 5 and the pulley 17 are fastened. Via the belt 21 and the belt pulley 19, the fan 7 is driven indirectly and at a slightly different speed due to the unequal diameter of the belt pulleys 17 and 19, which brings acoustic advantages.
  • bent webs 25 are integrally formed on the air guide scoop 3, which protrude into the outlet openings 13 and 15 and merge into an annular flange 27 and 29.
  • the electric motor 23 is fixed on the ring flange 27 by means of tabs 31 attached to it by screws 33.
  • the ring flange 29 receives a bearing part 35 for the fan 7.
  • the structural distance between the axes of rotation of the fans 5 and 7 is greater when the belt 21 is not mounted than when the belt 21 is applied.
  • the belt 21 is placed on a pulley and applied by pressing on the edge of the end face of the other pulley while rotating the fan - which is easily possible by hand is - then the webs 25 deform elastically and cause the pretension of the belt 21st

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Description

Die Erfindung bezieht sich auf eine Anordnung eines Doppellüfters in einem Aufnahmeteil gemäss dem Oberbegriff des Anspruchs 1.The invention relates to an arrangement of a double fan in a receiving part according to the preamble of claim 1.

In neuerer Zeit werden insbesondere Personenkraftwagen zur Erzielung eines günstigen Luftwiderstandsbeiwertes in vermehrtem Masse keilförmig gestaltet. Sofern der Kühler für den Verbrennungsmotor im Bereich der Fahrzeugfront untergebracht werden soll, ist diese Tendenz insofern unerwünscht, da die Bauhöhe des Kühlers reduziert werden muss. Ein Ausgleich über eine grössere Breite bedingt meist einen zweiten Lüfter.In recent times, passenger cars in particular have been designed to be increasingly wedge-shaped in order to achieve a favorable drag coefficient. If the cooler for the internal combustion engine is to be accommodated in the area of the front of the vehicle, this tendency is undesirable because the height of the cooler has to be reduced. Compensation over a larger width usually requires a second fan.

Bei den bekannten Anordnungen dieser Art wird ein Lüfter durch den Verbrennungsmotor angetrieben; der Antrieb des zweiten Lüfters erfolgt über einen Riemen, welcher mit auf den beiden Lüftern aufgebrachten Riemenscheiben in Eingriff steht. Zur Erzeugung der gewünschten'*-liemenspannung ist ein Riemenspanner vorgesehen.In the known arrangements of this type, a fan is driven by the internal combustion engine; The second fan is driven by a belt which engages with pulleys attached to the two fans. A belt tensioner is provided to generate the desired '* - belt tension.

Der Erfindung liegt die Aufgabe zugrunde, bei einer gattungsgemässen Anordnung eines Doppellüfters mit einfachen Mitteln eine Riemenspannung zu bewirken.The invention has for its object to effect belt tension in a generic arrangement of a double fan with simple means.

Die Aufgabe wird dadurch gelöst, dass bei montiertem Riemen die, die Lager der Drehachsen der Riemenscheiben tragenden Stege des Aufnahmeteils zur Erzielung einer Spannung elastisch verformbar sind, derart, dass bei montiertem Riemen der Abstand der Drehachsen an den Riemenscheiben geringer ist als bei demontiertem Riemen.The object is achieved in that, when the belt is mounted, the webs of the receiving part which support the bearings of the axes of rotation of the pulleys are elastically deformable in such a way that the distance between the axes of rotation on the belt pulleys is less than when the belt is removed when the belt is installed.

Durch die vorgeschlagene Anordnung wird erreicht, dass die erforderliche Riemenvorspannung alleinig durch das Aufnahmeteil erzeugt wird und ein separater Riemenspanner entbehrlich wird. Gleichfalls kann das Einstellen der Riemenspannung entfallen. Die Vorspannung des Riemens ist konstruktiv gegeben und wird im wesentlichen nur durch die Toleranz des Riemens beeinflusst. Wird eine entsprechende Längentoleranz des Riemens vorgegeben, dann ist eine ausreichende Riemenspannung über die gesamte Laufzeit des Riemens sichergestellt, da die bekannten, für diesen Zweck eingesetzten Riemen (meist Keilriemen) sich während der gesamten Laufzeit nur sehr geringfügig längen und dadurch wirksamen Einfluss auf die Riemenspannung nehmen.The proposed arrangement ensures that the required belt pretension is generated solely by the receiving part and that a separate belt tensioner is not required. The adjustment of the belt tension can also be omitted. The pretension of the belt is given by design and is essentially only influenced by the tolerance of the belt. If a corresponding length tolerance of the belt is specified, sufficient belt tension is ensured over the entire running time of the belt, since the known belts used for this purpose (mostly V-belts) lengthen only very slightly during the entire running time and therefore have an effective influence on the belt tension to take.

Die einzelnen, zur Erzielung einer Spannung elastisch verformbaren Elemente des Aufnahmeteils können unmittelbar durch die nicht an übrigen Karosserieteilen festgelegten Bereiche des Aufnahmeteiles erzeugt werden, wenn dieses aus einem Material mit entsprechenden elastischen Eigenschaften (z.B. Blech oder Kunststoff) besteht. Es ist jedoch auch möglich, bestimmte Abschnitte des Aufnahmeteils gezielt für diesen Zweck auszubilden oder durch Zwischenschaltung eines geeigneten Bauteils aus anderem Material einen zur elastischen Verformung geeigneten Bereich zu schaffen.The individual elements of the receiving part which can be elastically deformed in order to achieve a tension can be produced directly through the areas of the receiving part which are not defined on other body parts if the latter consists of a material with corresponding elastic properties (e.g. sheet metal or plastic). However, it is also possible to specifically design certain sections of the receiving part for this purpose or to create an area suitable for elastic deformation by interposing a suitable component made of another material.

Der Anspruch 2 kennzeichnet ein besonders vorteilhaftes Ausführungsbeispiel der Erfindung zur Schaffung elastisch verformbarer Elemente des Aufnahmeteils. Die vorgeschlagenen Stege sind dafür besonders geeignet, da sie nahe der Drehachsen der Riemenscheiben gelegen sind und ausserdem nicht wie die das Aufnahmeteil bildende Luftleithutze an sonstigen Fahrzeugteilen festgelegt sind. Durch die elastische Verformung der Stege wird erreicht, dass sich die Drehachsen der Riemenscheiben spitzwinkelig aufeinander zubewegen. Da dies zur Erzielung der gewünschten Riemenvorspannung nur in geringem Umfang notwendig ist, hat dies kaum einen Einfluss auf den Antrieb; insbesondere dann nicht, wenn ein Keilriemen verwendet wird.The claim 2 characterizes a particularly advantageous embodiment of the invention for creating elastically deformable elements of the receiving part. The proposed webs are particularly suitable for this, since they are located near the axes of rotation of the pulleys and, moreover, are not fixed to other vehicle parts like the air guide screed forming the receiving part. The elastic deformation of the webs ensures that the axes of rotation of the pulleys move towards each other at an acute angle. Since this is only necessary to a small extent to achieve the desired belt pretension, this has hardly any influence on the drive; especially not if a V-belt is used.

Die Luftleithutze kann aus mehreren Teilen zusammengesetzt sein uns aus verschiedenen Werkstoffen (z.B. Kunststoff) bestehen. Besonders vorteilhaft ist, wenn die Luftleithutze und die Stege einstückig als Blechpressteil ausgeführt sind. Diese Ausbildung gewährleistet eine besonders kostengünstige Herstellung und stellt ausserdem durch das verwendete Material für die Vorspannung ausreichende elastische Eigenschaften zur Verfügung. Versuche haben gezeigt, dass - abgesehen vom Abstand der Drehachse - keine besonderen Massnahmen notwendig sind, um für eine lange Laufzeit die gewünschte Riemenspannung sicherzustellen.The air control scoop can be composed of several parts and made of different materials (e.g. plastic). It is particularly advantageous if the air guide scraper and the webs are made in one piece as a pressed sheet metal part. This training ensures a particularly cost-effective production and also provides sufficient elastic properties through the material used for the prestressing. Tests have shown that - apart from the distance of the axis of rotation - no special measures are necessary to ensure the desired belt tension for a long running time.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt. Es zeigt

  • Fig. 1 in perspektivischer Darstellung eine Luftleithutze mit zwei über einen Riemen verbundenen Lüftern und
  • Fig. 2 die Ansicht Z der Luftleithutze aus Fig. 1.
An embodiment of the invention is shown in the drawing. It shows
  • Fig. 1 is a perspective view of an air guide with two fans connected by a belt and
  • 2 shows the view Z of the air guiding scoop from FIG. 1.

Eine in Fig. 1 dargestellte Luftleithutze 3 zur Befestigung am Kühler eines Kraftfahrzeuges ist mit zwei Lüftern 5 und 7 bestückt. Die Luftleithutze 3 ist einstückig aus Blech gepresst und an ihren Rändern mit Befestigungslöchern 9 versehen. Die etwa rechteckig ausgebildete Eintrittsöffnung 11 ist etwa dem Umfang des in der Zeichnung nicht dargestellten Kühlers angepasst. Ein weiteres Merkmal der Luftleithutze 3 sind zwei kreisförmige Austrittsöffnungen 13 und 15, deren Durchmesser geringfügig grösser als der Durchmesser der zugeordneten Lüfter 5 und 7 ist. Jeder Lüfter 5 und 7 trägt eine Riemenscheibe 17 bzw. 19, welche über einen Riemen 21 miteinander verbunden sind. Der Antrieb des Lüfters 5 erfolgt direkt über einen Elektromotor 23, an dessen Austrittswelle der Lüfter 5 und die Riemenscheibe 17 befestigt sind. Über den Riemen 21 und die Riemenscheibe 19 wird der Lüfter 7 indirekt und aufgrund ungleicher Durchmesser der Riemenscheiben 17 und 19 mit einer geringfügig anderen Geschwindigkeit angetrieben, was akustische Vorteile bringt.An air guide 3 shown in Fig. 1 for attachment to the radiator of a motor vehicle is equipped with two fans 5 and 7. The air guide scoop 3 is pressed in one piece from sheet metal and is provided with fastening holes 9 at its edges. The approximately rectangular inlet opening 11 is adapted approximately to the circumference of the cooler, not shown in the drawing. Another feature of the air guide scoop 3 are two circular outlet openings 13 and 15, the diameter of which is slightly larger than the diameter of the associated fans 5 and 7. Each fan 5 and 7 carries a pulley 17 and 19, which are connected to each other via a belt 21. The fan 5 is driven directly by an electric motor 23, on the outlet shaft of which the fan 5 and the pulley 17 are fastened. Via the belt 21 and the belt pulley 19, the fan 7 is driven indirectly and at a slightly different speed due to the unequal diameter of the belt pulleys 17 and 19, which brings acoustic advantages.

Wie aus Fig. 2 unmittelbar ersichtlich sind an der Luftleithutze 3 gekröpfte Stege 25 einstückig mit angeformt, welche in die Austrittsöffnungen 13 bzw. 15 einragen und in einen Ringflansch 27 bzw. 29 übergehen. Am Ringflansch 27 ist der Elektromotor 23 mittels an ihm angebrachter Laschen 31 durch Schrauben 33 festgelegt. Der Ringflansch 29 nimmt ein Lagerteil 35 für den Lüfter 7 auf.As can be seen directly from FIG. 2, bent webs 25 are integrally formed on the air guide scoop 3, which protrude into the outlet openings 13 and 15 and merge into an annular flange 27 and 29. The electric motor 23 is fixed on the ring flange 27 by means of tabs 31 attached to it by screws 33. The ring flange 29 receives a bearing part 35 for the fan 7.

Zur Erzielung einer Vorspannung für den Riemen 21 ist der konstruktive Abstand der Drehachsen der Lüfter 5 und 7 bei nicht montiertem Riemen 21 grösser, als wenn der Riemen 21 aufgebracht ist. Wird der Riemen 21 auf eine Riemenscheibe aufgelegt und durch Andrücken an den Rand der Stirnfläche der anderen Riemenscheibe bei gleichzeitigem Drehen des Lüfters aufgebracht - was leicht von Hand möglich ist - dann verformen sich die Stege 25 elastisch und bewirken die Vorspannung des Riemens 21.To achieve a pretension for the belt 21, the structural distance between the axes of rotation of the fans 5 and 7 is greater when the belt 21 is not mounted than when the belt 21 is applied. The belt 21 is placed on a pulley and applied by pressing on the edge of the end face of the other pulley while rotating the fan - which is easily possible by hand is - then the webs 25 deform elastically and cause the pretension of the belt 21st

Claims (3)

1. Arrangement of a double fan in a mounting element (3), each fan (5/7) carrying a belt pulley (17/19), one fan (5( being driven, and the rotational movement being transmitted to the other fan (7) by a belt (21) co-operating with the belt pulleys (17/19), also with means for influencing belt tension, characterised in that the webs (25) of the mounting element (3) which support the bearings of the rotary shafts of the belt pulleys (17/19) are elastically deformable to achieve tension when the belt (21) is fitted, in such a manner that the spacing of the rotary shafts at the belt pulleys (17/19) is smaller when the belt (21) is fitted than when the belt (21) is removed.
2. Arrangement according to claim 1, the mounting element being constructed as an air scoop with an inlet aperture corresponding approximately to the outline of a condenser and/or radiator situated adjacently, and two circular outlet apertures which correspond approximately to the outlines of the associated fans, characterised in that elastically deformable webs (25) extending over the outlet apertures (13/15) and connected to the air scoop (3) are provided for receiving the fans (5/7) and the drive unit (23).
3. Arrangement according to claim 2, characterised in that the air scoop (3) and the webs (25) are made in one piece as a sheet metal part.
EP83112391A 1982-12-21 1983-12-09 Arrangement of a twin fan in a housing Expired EP0111845B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3247165 1982-12-21
DE3247165A DE3247165C1 (en) 1982-12-21 1982-12-21 Arrangement of a double fan in a receiving part

Publications (2)

Publication Number Publication Date
EP0111845A1 EP0111845A1 (en) 1984-06-27
EP0111845B1 true EP0111845B1 (en) 1986-07-16

Family

ID=6181214

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83112391A Expired EP0111845B1 (en) 1982-12-21 1983-12-09 Arrangement of a twin fan in a housing

Country Status (2)

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EP (1) EP0111845B1 (en)
DE (2) DE3247165C1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR880004203A (en) * 1986-09-05 1988-06-02 클라우드 에이. 포쓰 Air flow
DE4324071A1 (en) * 1993-07-17 1995-01-19 Audi Ag Cooling air guide device
DE19545390C2 (en) * 1995-12-06 2000-07-27 Behr Gmbh & Co Tandem fan for radiators of motor vehicles

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2382712A (en) * 1942-12-31 1945-08-14 Edmund E Hans Heater arrangement
US2708373A (en) * 1951-09-27 1955-05-17 Gen Motors Corp Power transmitting device
GB861722A (en) * 1958-06-20 1961-02-22 Normalair Ltd Improvements in or relating to air conditioning systems for vehicles
US3164027A (en) * 1961-02-16 1965-01-05 Garland Sales Company Belt tightener
US3351129A (en) * 1965-09-17 1967-11-07 Milton E Spatt Air conditioning systems for vehicles such as buses
FR2373697A1 (en) * 1976-12-13 1978-07-07 Ferodo Sa COOLED MOTOR FAN UNIT

Also Published As

Publication number Publication date
DE3247165C1 (en) 1984-06-07
DE3364546D1 (en) 1986-08-21
EP0111845A1 (en) 1984-06-27

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