EP1914402A1 - Ventilateur axial et procédé destiné à éviter un flux de recirculation - Google Patents

Ventilateur axial et procédé destiné à éviter un flux de recirculation Download PDF

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Publication number
EP1914402A1
EP1914402A1 EP07018190A EP07018190A EP1914402A1 EP 1914402 A1 EP1914402 A1 EP 1914402A1 EP 07018190 A EP07018190 A EP 07018190A EP 07018190 A EP07018190 A EP 07018190A EP 1914402 A1 EP1914402 A1 EP 1914402A1
Authority
EP
European Patent Office
Prior art keywords
axial
profile
teeth
blower according
axial blower
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
EP07018190A
Other languages
German (de)
English (en)
Other versions
EP1914402B1 (fr
Inventor
Uwe Dipl.-Ing. Aschermann
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
Original Assignee
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
Application filed by Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Publication of EP1914402A1 publication Critical patent/EP1914402A1/fr
Application granted granted Critical
Publication of EP1914402B1 publication Critical patent/EP1914402B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04D29/08—Sealings
    • F04D29/16—Sealings between pressure and suction sides
    • F04D29/161—Sealings between pressure and suction sides especially adapted for elastic fluid pumps
    • F04D29/164—Sealings between pressure and suction sides especially adapted for elastic fluid pumps of an axial flow wheel
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
    • F04D29/526—Details of the casing section radially opposing blade tips
    • 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
    • F04D29/326—Rotors specially for elastic fluids for axial flow pumps for axial flow fans comprising a rotating shroud

Definitions

  • the invention relates to a blower according to the preamble of claim 1 and a method for preventing a recirculation flow according to the preamble of claim 13.
  • Axial blowers are used as cooling fans for cooling the internal combustion engine in motor vehicles. They consist of an impeller with Axialbeschaufelung, which is driven by an electric motor or the internal combustion engine, and an air-lightening device, a so-called fan cowl or fan cowl, which has a Zargenring in which the axial fan rotates.
  • Today's axial fans are often designed as a jacket fan, d. H. they have a shell attached to the shroud, which rotates in the Zargenring the fan cowl, wherein between annular and Zargenring a ring or radial gap is formed.
  • the problem underlying the invention is the recirculation of the air exiting the fan, which has a higher pressure level than the air entering the fan. Therefore, part of the exiting air flows back into the suction area due to the pressure gradient through the radial gap. Because of this power loss, the fan and the cooling capacity is reduced.
  • the EP 0 746 689 B1 was an axial fan, consisting of a jacket fan and a fan frame with Zargenring known, wherein on the inside of the Zargenringes fixed blades are arranged, which extend in the axial and radial directions.
  • the blades are on the one hand in the Area of the fan shroud arranged on the Zargenring, on the other hand, in the flow direction in front of or behind the fan shroud.
  • the purpose of the blades is to eliminate or reduce the swirl (circumferential component) in the recirculation flow.
  • the known blades act as an axial "rectifier" for the recirculation flow. The axial component of the recirculation flow is thus not suppressed.
  • the guide ring of the air guiding device has an inner profile projecting into the radial gap, which is formed by teeth and pockets (tooth spaces) arranged alternately on the circumference.
  • the inner profile according to the invention forms with the smooth outer surface of the fan shroud a circumferential gap in which recirculating air, d. H. a portion of the airflow exiting the fan enters.
  • a flow through the gap between the shell and Zargenring is thereby prevented or greatly reduced. This results in a higher fan efficiency and - when used as a cooling fan - a higher cooling capacity.
  • the profile of the teeth and pockets can be designed differently: a preferred embodiment provides a sawtooth profile for the teeth or pockets, wherein the sawtooth is characterized by a steep, approximately in the radial direction flank and a flat, extending more in the tangential edge , Before the steep flank, the air, which is entrained by the surface of the rotating mantle, accumulates. This creates a rotational movement, which leads to the formation of a or multiple vertebrae in the adjacent pocket (tooth space). The vortices thus "clog" the axial passage of the gap, they act as a seal against a leakage current.
  • the steep flank of the sawtooth may be the direction of rotation of the shell or turned away. This results in different degrees pronounced vortex or a different braking effect for the recirculation flow in the axial direction.
  • the sawtooth represents an asymmetric profile (relative to a radial plane)
  • the invention are also symmetrical tooth profiles, z.
  • triangular profiles isosceles triangle
  • the pockets between the triangular profiles can be trapezoidal or round.
  • the head of the tooth profiles be formed pointed or flattened, z. B. trapezoidal or parallelogram.
  • a preferred symmetrical, flattened tooth shape is characterized by a dovetail profile: in this case the resulting vertebrae are trapped in a pocket with a dovetailed profile.
  • the tooth profile according to the invention on the Zargenring can be relatively easily produced, in particular as a plastic injection part, which is easily demoulded in the axial direction.
  • the object of the invention is also achieved by a method having the features of claim 13.
  • vortices are generated in the annular gap between the rotating jacket and the fixed guide ring or collar ring, the direction of rotation of which runs perpendicular to an axially directed recirculation flow.
  • a sealing effect is produced in the annular gap, which prevents the recirculation flow.
  • Fig. 1 shows a half-axial section through a designed as a fan frame 1 louver with a cylindrically shaped Zargenring 2 .
  • a fan frame 1 in particular within the Zargenringes 2 designed as a shell fan 3 axial fan is arranged, which by a motor, not shown, for. B. is driven by an electric motor and rotates in the Zargenring 2.
  • the axial fan 3 has an axial blading 4 and an annular jacket 5, which is integrally connected to the tips of the axial blades 4, that is, the axial fan 3 is formed as a plastic injection-molded part.
  • the jacket 5 has a cylindrical part 5a, which rotates in the cylindrical frame ring 2, and a bell-shaped inlet region 5b.
  • the cylindrical frame ring 2 is followed by a cylindrical Ring 6 of smaller diameter, over which the funded by the fan 3 air exits the frame 1.
  • the fan is then behind one or more heat exchangers, a so-called cooling module, and draws cooling air through the heat exchanger.
  • the Zargenring 2 forms with the fan shroud 5 an annular gap s, in which a recirculation flow can form due to the pressure gradient between the fan outlet and fan inlet side.
  • On the inner circumference of the Zargenringes 2 designed as a tooth profile inner profile 7 is arranged, which is shown and explained in more detail below with reference to sections in the plane XX.
  • Fig. 2 shows a partial section in the plane XX in Fig. 1, ie the formation of the annular gap s, which is formed on the one hand by a smooth cylindrical outer surface 5c of the shell 5 and on the other hand by the sawtooth-shaped inner profile 7 on the inner circumference of the Zargenringes 2.
  • the direction of rotation of the fan wheel 3 is shown by an arrow D, the Zargenring 2 is stationary, for example, in a motor vehicle or motor side attached.
  • FIG. 3 shows an enlarged view of the gap geometry according to FIG. 2, ie with the inner profile 7, which is characterized by a sawtooth 8.
  • the profile of the sawtooth 8 has a steep flank 8a, which lies approximately in a radial plane E, and a flat flank 8b, which extends substantially in the tangential direction.
  • the tips of the saw teeth 8 are located on a tooth tip diameter D Z , which is shown in phantom.
  • the outer diameter of the shell 5, ie its circumference 5c is marked with D a . Between the tooth head diameter D z and the outer diameter D a thus remains a minimum gap s 0 , which is essentially due to production.
  • FIG. 4 shows a further exemplary embodiment of the invention for the inner profile 7, which is designed here as a modified sawtooth 12.
  • the profile of the sawtooth 12 is characterized by a steep flank 12a, extending approximately in a radial plane, and by an inclined flank 12b, which merges into an approximately circumferentially extending portion, a groove bottom 12c.
  • a pocket 13 is formed in softer - as shown in Fig. 7 - form vertebrae.
  • the pockets 13 form continuous grooves in the axial direction.
  • Fig. 5 shows a further embodiment of the invention for the inner profile 7, which is formed by a symmetrical tooth profile 14 in conjunction with axially continuous pockets 15.
  • the tooth profile 14 has a triangular profile with symmetrically arranged flanks 14a, 14b, which in each case extend in a region extending approximately in the circumferential direction, a groove bottom 14c. This symmetrical profile 14 is thus independent of direction of rotation, the accumulation effect of the air is less pronounced here.
  • Fig. 6 shows a further embodiment of the invention for the inner profile 7 in the form of a flattened sawtooth profile 16.
  • the profile 16 has a flattened tooth tip 16a, a steep flank 16b and a flat flank 16c, which merges into a groove bottom 16d.
  • pockets 17 are formed.
  • Fig. 7 shows the vortex formation for the sawtooth profile 12 shown in Fig. 4, in which form in the pockets 13 vertebrae 17, 18 of different sizes, which are shown as circular arrows.
  • the rotational movement of the vertebrae 17, 18 extends in a clockwise direction while the direction of rotation of the mantle 5 is left-handed according to the directional arrow D (looking at the plane of the drawing).
  • the rotational movement of the vertebrae 17, 18 is thus directed perpendicular to an axially directed recirculation flow, resulting in the above-mentioned sealing or braking action.
  • Fig. 8 shows a further embodiment of the invention for the inner profile 7 with a trapezoidal tooth profile 19, between which pockets 20 (tooth spaces) are arranged.
  • the trapezoidal profile 19 is formed symmetrically here and has a flat tooth tip 19a and two symmetrical flanks 19b, 19c.
  • the pockets 20 are bounded outwardly by a groove bottom 19d between the flanks 19b, 19c.
  • the formation of the vertebrae for the trapezoidal profile 19 is shown in Fig. 11.
  • FIG. 9 shows a further embodiment of the invention for the inner profile 7 in the form of a tooth profile 21, which is designed as a parallelogram and thus asymmetrical with respect to a radial plane. Between the tooth profiles 21 pockets 22 are formed.
  • the parallelogram 21 has a flattened tooth tip 21a and two parallel flanks 21b, 21c, between which a groove bottom 21d extends.
  • Fig. 10 shows a further embodiment of the invention for the inner profile 7 with a flattened tooth profile 23 and rounded, ie approximately semicircular pockets 24. From a flattened tooth tip 23a go from each circular concave flanks 23a, 23b, which form the semicircular pockets 24 , In the pocket 24, a standing vortex can form.
  • FIG. 11 shows a representation of the vortex formation for the inner profile 7 according to FIG. 8, ie with a trapezoidal tooth profile 19 and corresponding pockets 20. Due to the symmetrical geometries of the tooth profile 19 and the pockets 20, two identical clockwise rotating vertebrae 25, 26 are formed the bag 20 off.
  • FIG. 12 shows a further exemplary embodiment of the invention for the inner profile 7 in the form of a modified sawtooth profile 27 with pockets 28.
  • the sawtooth profile 27 is asymmetrical and has a slightly flattened tooth tip 27a and a short, relatively steep flank 27b and a longer, less steep flank 27c. Both flanks 27b, 27c are adjoined by a groove base 27d extending in the circumferential direction.
  • Fig. 13 shows a final embodiment of the invention for the inner profile 7 in the form of a dovetail profile 29 with corresponding pockets 30.
  • the dovetail profile 29 and the pockets 30 are formed symmetrically.
  • a flat tooth head 29a is adjoined by two mutually converging flanks 29b, 29c, which meet a groove bottom 29d.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP07018190A 2006-10-11 2007-09-17 Ventilateur axial et procédé destiné à éviter un flux de recirculation Expired - Fee Related EP1914402B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006048483A DE102006048483A1 (de) 2006-10-11 2006-10-11 Axialgebläse und Verfahren zur Verhinderung einer Rezirkulationsströmung

Publications (2)

Publication Number Publication Date
EP1914402A1 true EP1914402A1 (fr) 2008-04-23
EP1914402B1 EP1914402B1 (fr) 2011-08-03

Family

ID=38870583

Family Applications (1)

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EP07018190A Expired - Fee Related EP1914402B1 (fr) 2006-10-11 2007-09-17 Ventilateur axial et procédé destiné à éviter un flux de recirculation

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EP (1) EP1914402B1 (fr)
DE (1) DE102006048483A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008143603A1 (fr) 2006-12-28 2008-11-27 Carrier Corporation Conception de carter de ventilateur axial avec coins périphériquement espacés
ITTO20110362A1 (it) * 2011-04-26 2012-10-27 Denso Corp Gruppo ventilatore per veicoli
WO2020169546A1 (fr) * 2019-02-18 2020-08-27 Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg Ventilateur de radiateur d'un véhicule à moteur

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008046508A1 (de) * 2008-09-09 2010-03-11 Behr Gmbh & Co. Kg Lüftervorrichtung zur Belüftung eines Verbrennungsmotors, Kühlsystem mit zumindest einer Lüftervorrichtung
DE102010039219A1 (de) * 2010-08-11 2012-02-16 Behr Gmbh & Co. Kg Lüfter, insbesondere für ein Motorkühlungsgebläse in einem Kraftfahrzeug
CN109114014A (zh) 2017-06-23 2019-01-01 博格华纳公司 具有用于降低再循环流量的集成风扇护罩通道的风扇系统

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0746689B1 (fr) * 1993-08-30 2002-04-24 Robert Bosch Corporation Boitier a recirculation controlee pour utilisation avec un ventilateur axial a pales entourees par un anneau cylindrique
EP1340921A2 (fr) * 2002-02-27 2003-09-03 Halla Climate Control Corporation Ensemble ventilateur
EP1443215A2 (fr) * 2003-01-29 2004-08-04 Siemens VDO Automotive Inc. Etanchéification integrée pour buse de ventilateur
EP1462657A1 (fr) * 2003-03-28 2004-09-29 Samsung Electronics Co., Ltd. Ventilateur axial
FR2879266A1 (fr) * 2004-12-15 2006-06-16 Valeo Systemes Dessuyage Systeme de ventilateur comportant des moyens de limitation de debit d'air parasite
US20060216147A1 (en) * 2005-03-26 2006-09-28 Halla Climate Control Corporation Fan and shroud assembly

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0746689B1 (fr) * 1993-08-30 2002-04-24 Robert Bosch Corporation Boitier a recirculation controlee pour utilisation avec un ventilateur axial a pales entourees par un anneau cylindrique
EP1340921A2 (fr) * 2002-02-27 2003-09-03 Halla Climate Control Corporation Ensemble ventilateur
EP1443215A2 (fr) * 2003-01-29 2004-08-04 Siemens VDO Automotive Inc. Etanchéification integrée pour buse de ventilateur
EP1462657A1 (fr) * 2003-03-28 2004-09-29 Samsung Electronics Co., Ltd. Ventilateur axial
FR2879266A1 (fr) * 2004-12-15 2006-06-16 Valeo Systemes Dessuyage Systeme de ventilateur comportant des moyens de limitation de debit d'air parasite
US20060216147A1 (en) * 2005-03-26 2006-09-28 Halla Climate Control Corporation Fan and shroud assembly

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008143603A1 (fr) 2006-12-28 2008-11-27 Carrier Corporation Conception de carter de ventilateur axial avec coins périphériquement espacés
EP2097313A1 (fr) * 2006-12-28 2009-09-09 Carrier Corporation Conception de carter de ventilateur axial avec coins périphériquement espacés
EP2097313A4 (fr) * 2006-12-28 2012-12-19 Carrier Corp Conception de carter de ventilateur axial avec coins périphériquement espacés
ITTO20110362A1 (it) * 2011-04-26 2012-10-27 Denso Corp Gruppo ventilatore per veicoli
EP2517916A1 (fr) 2011-04-26 2012-10-31 DENSO THERMAL SYSTEMS S.p.A. Ventilateur construction pour vehicules
US9180772B2 (en) 2011-04-26 2015-11-10 Denso Thermal Systems S.P.A. Fan assembly for vehicles
WO2020169546A1 (fr) * 2019-02-18 2020-08-27 Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg Ventilateur de radiateur d'un véhicule à moteur

Also Published As

Publication number Publication date
DE102006048483A1 (de) 2008-05-08
EP1914402B1 (fr) 2011-08-03

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