EP0546361B1 - Ventilateur axial - Google Patents

Ventilateur axial Download PDF

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Publication number
EP0546361B1
EP0546361B1 EP92119783A EP92119783A EP0546361B1 EP 0546361 B1 EP0546361 B1 EP 0546361B1 EP 92119783 A EP92119783 A EP 92119783A EP 92119783 A EP92119783 A EP 92119783A EP 0546361 B1 EP0546361 B1 EP 0546361B1
Authority
EP
European Patent Office
Prior art keywords
blades
blade
axial fan
fan according
rotation
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
EP92119783A
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German (de)
English (en)
Other versions
EP0546361A1 (fr
Inventor
Kurt Dipl.-Ing. Hauser
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
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Filing date
Publication date
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Application filed by Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Publication of EP0546361A1 publication Critical patent/EP0546361A1/fr
Application granted granted 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
    • F04D29/26—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

Definitions

  • the invention relates to an axial fan, in particular for radiators of motor vehicle engines, with an impeller with several asymmetrically arranged fan blades.
  • An impeller for an axial fan is also known (DE 38 32 026 A1), in which one has avoided subjectively disturbing noises by arranging a blade with a shape different from this between two adjacent blades of the same shape.
  • One example provides three groups of blades, each with three blades of the same shape, offset at an angle of 120 ° to one another, the individual blades of which are arranged next to one another in the circumferential direction in such a way that they are distributed approximately uniformly over the circumference of the hub.
  • the respective blade root has a different length in the circumferential direction. It has been shown that with such an impeller design the frequency of the rotary gear can be reduced, but the rotary sound itself cannot be eliminated.
  • the present invention is therefore based on the object of designing an axial fan of the type mentioned in such a way that the known effect of eliminating the rotary sound can be achieved by asymmetrical division, but without the cooling capacity needing to be reduced.
  • the asymmetrical blade arrangement with an uneven pitch is only provided in an outer radial region of the blades, while in the inner radial region adjoining the hub, which has a width of about a third of the radial Has length of the blades, there is a radially symmetrical blade arrangement with the same pitch and the same blade design.
  • This design is based on the knowledge that it is sufficient to move the asymmetrical design to the outer area of the drive and to design it according to the criteria known per se, but to leave the design in the inner radial area as in the case of radially symmetrical designs
  • Impellers of conventional design are the case in which all the blades are evenly distributed over the circumference and are of the same design.
  • the number of blades to be used need not be reduced, so that the cooling capacity can remain high.
  • the asymmetrical design is only sufficient in the outer radial area to prevent the unwanted rotary sound.
  • an advantageous further development of the invention results when the angular distance between the center of the outermost blade ends and the center of adjacent blades is different in each case.
  • the division in the outer region changes from blade to blade as a result of this configuration.
  • the blades in the outer region can each be designed differently, so that in this outer radial region the blade shape is also different from blade to blade. It has been shown that the unwanted rotary sound can be eliminated in a particularly advantageous manner by these measures.
  • the invention is illustrated in the drawing using an exemplary embodiment.
  • the only embodiment shows an impeller for an axial fan seen in the flow direction.
  • This impeller (1) consists of a central hub (2) and an outer ring (3) concentrically surrounding this hub, and nine fan blades (4 to 12) extend between the outer ring (3) and hub (2). All of these fan blades (4 to 12) have an identically designed blade root (13) which in each case extends up to the circular line (14) shown in broken lines.
  • the outer circumference of the hub (2) and this circular line (14) delimit an inner radial region (15) which forms a ring with the width B i .
  • This width B i corresponds to approximately one third of the length l of the blades (4 to 12), this length l being measured radially between the circumference of the hub (2) and the inner circumference (3a) of the outer ring (3).
  • an outer radial area (16) of the impeller (1) is therefore formed, which also forms a ring in plan view, the width B a is.
  • the blades are therefore designed in the same way as in a radially symmetrical fan wheel.
  • both the shape of the individual blades (4 to 12) and their division with respect to the outer ring (3) differ.
  • the design has been made so that in the outer radial region (16) an arrangement and design of the blades (4 to 12) is made, which is symmetrical to the plane S, which with the central axis and the central plane through the blade (4) coincides, which runs exclusively radially.
  • the blade (5) adjoining the radially extending blade (4) in the direction of rotation (17) is curved in a crescent shape to the rear against the direction of rotation (17). Accordingly, the blade (12), which is symmetrical to it, is curved in a crescent shape in the direction of rotation (17) to the front.
  • the blade (6) adjoining the blade (5) in the direction of rotation (17) is also curved counter to the direction of rotation (17).
  • the curvature is much flatter than that of the blade (5). Accordingly, the curvature of the blade (11), which is symmetrical to the blade (6) and extends in the direction of rotation, is weaker than the curvature of the blade (12).
  • the blade (7) adjoining the blade (6) in the direction of rotation is crescent-shaped in the direction of rotation, more specifically than the blade (8) adjacent to it in the direction of rotation.
  • the blades (9 and 10) are again symmetrical to the blades (7 and 8) and are therefore crescent-shaped against the direction of rotation, the backward curvature of the blade (9) again being smaller than that of the blade (10).
  • This configuration leads to the angular distance between the ends of the blades (4 to 12) in the exemplary embodiment measured on the inner circumference (3a) of the outer ring (3) is different, namely from blade to blade.
  • the angular distance (20) between the center (4a) of the blade (4) and the center (5a) of the adjacent blade (5) in the exemplary embodiment is 32.3 °, while the distance (21) between the center (5a) is Blade (5) and the center (6a) of the adjacent blade (6) in the direction of rotation is 44.4 °.
  • the distance (22) between the center (6a) of the blade (6) and the blade (7) adjacent to it in the direction of rotation is 51.1 ° and then follows between the center (7a) of the blade (7) and the center (8a) of the blade (8) an angular distance (23) of 37 °.
  • the centers (8a and 9a) of the blades (8 and 9) are spaced apart by an angular distance (24) of 30.6 ° and then there is again an angular distance (23 ') between the centers of the blades (9 and 10) 37 °.
  • the angular distance (22 ') between the center (10a) of the blade (10) and the center (11a) of the blade (11) adjacent to it in the direction of rotation is not selected exactly according to the distance (22), but only with 50 , 9 ° and the distance (21 ') is also not exactly the same as the distance (21), but is chosen to be somewhat larger with 44.7 °.
  • the distance (20 ') is also only 32.1 ° in contrast to 32.3 ° of the distance (20).
  • the plane S remains essentially the plane of symmetry for the impeller (1), which therefore also has no imbalance and, in addition to a large air output, is also designed in such a way that an annoying rotary sound is avoided.
  • the angular distances (20 to 24, 20 'to 23') can also be varied.
  • the symmetrical structure is also not necessary in every case.
  • the decisive factor is that a completely symmetrical arrangement and design of the blade feet (13) is selected and the asymmetrical arrangement for the purpose of preventing the rotary sound, which is known per se, is only inserted in the outer radial region (16).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (7)

  1. Ventilateur axial, notamment pour radiateurs de moteurs de véhicules automobiles, comprenant un rotor (1) comportant un moyeu (2) et plusieurs pales de ventilateur (4 à 12) disposées asymétriquement, caractérisé en ce que la disposition asymétrique des pales, avec pas irrégulier, n'est prévue que dans une région radiale extérieure (16) des pales (4 à 12) tandis que, dans la région radiale intérieure (15) adjacente au moyeu (2), qui possède une largeur Bi d'environ un tiers de la longueur radiale (1) des pales (4 à 12), est prévue une disposition des pales à symétrie radiale, et avec un pas identique et avec la même conformation des pales.
  2. Ventilateur axial selon les revendications 1 et 2, caractérisé en ce que l'écartement angulaire (20 à 24) des milieux (4a à 12a) des extrémités extrêmes extérieures des pales par rapport au milieu des pales adjacentes est différent dans chaque cas.
  3. Ventilateur axial selon une des revendications 1 à 3, caractérisé en ce que, dans la région radiale extérieure (16), les pales sont toutes de forme différente.
  4. Ventilateur axial selon la revendication 3, caractérisé en ce qu'une paire de pales (5, 6) incurvées en sens inverse du sens de la rotation (17) alterne avec une paire de pales (7, 8) incurvées dans le sens de la rotation (17).
  5. Ventilateur axial selon la revendication 4, caractérisé en ce qu'entre deux paires de pales (5, 6 et 11, 12 respectivement) incurvées en sens inverse l'une de l'autre, est disposée une pale (4) d'orientation exclusivement radiale.
  6. Ventilateur axial selon la revendication 5, caractérisé en ce que le plan médian (S) de la paie (4) d'orientation radiale forme sensiblement un plan de symétrie pour la disposition et la configuration des pales dans la région radiale extérieure (16).
  7. Ventilateur axial selon la revendication 1 ou une des autres revendications, caractérisé en ce que les extrémités extérieures des pales (4 à 12) du ventilateur sont fixées à un anneau extérieur (3) qui tourne avec les pales.
EP92119783A 1991-12-12 1992-11-20 Ventilateur axial Expired - Lifetime EP0546361B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4140987A DE4140987A1 (de) 1991-12-12 1991-12-12 Axialluefter
DE4140987 1991-12-12

Publications (2)

Publication Number Publication Date
EP0546361A1 EP0546361A1 (fr) 1993-06-16
EP0546361B1 true EP0546361B1 (fr) 1995-09-06

Family

ID=6446885

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92119783A Expired - Lifetime EP0546361B1 (fr) 1991-12-12 1992-11-20 Ventilateur axial

Country Status (3)

Country Link
EP (1) EP0546361B1 (fr)
DE (2) DE4140987A1 (fr)
ES (1) ES2076655T3 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2302141B (en) * 1995-06-13 1997-10-22 Lg Electronics Inc Axial flow fan for microwave oven
DE202004005548U1 (de) 2003-04-19 2004-06-17 Ebm-Papst St. Georgen Gmbh & Co. Kg Lüfter
DE102009041616A1 (de) * 2009-09-17 2011-03-24 Behr Gmbh & Co. Kg Lüfter für eine Brennkraftmaschine
US9739195B2 (en) * 2014-09-29 2017-08-22 Ford Global Technologies, Llc Enhanced charge air cooler
CN105066085A (zh) * 2015-08-14 2015-11-18 吉首大学 尾热利用式防积尘燃油锅炉
CN105066124A (zh) * 2015-08-14 2015-11-18 吉首大学 一种尾热利用式防积尘燃油锅炉
CN107218249A (zh) * 2017-08-01 2017-09-29 曹建礼 风扇轮加强箍
DE102020004255A1 (de) 2020-07-15 2022-01-20 Daimler Ag Turbinenrad für eine Turbine eines Abgasturboladers
DE102023200065A1 (de) * 2023-01-04 2024-07-04 Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg Lüfterrad und Lüftervorrichtung mit einem solchen Lüfterrad

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0261399A (ja) * 1988-08-26 1990-03-01 Calsonic Corp 軸流ファン

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT83294B (de) * 1917-08-20 1921-03-25 Siemens Schuckertwerke Gmbh Laufrad für Schleuderpumpen.
US1417486A (en) * 1920-11-15 1922-05-30 Glassmann Bartha Welding Corp Propeller
DE7408020U (de) * 1973-09-13 1974-05-30 Aurora Fahrzeugheizungen Schulz K Kg Lüfterrad
US5000660A (en) * 1989-08-11 1991-03-19 Airflow Research And Manufacturing Corporation Variable skew fan
IT214345Z2 (it) * 1988-04-01 1990-05-03 Magneti Marelli Spa Ventilatore assiale particolarmente per autoveicoli
DE3832026A1 (de) * 1988-09-21 1990-03-22 Bosch Gmbh Robert Luefterrad

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0261399A (ja) * 1988-08-26 1990-03-01 Calsonic Corp 軸流ファン

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 14, no. 235 (M - 975)<4178> 18 May 1990 (1990-05-18) *

Also Published As

Publication number Publication date
ES2076655T3 (es) 1995-11-01
DE59203578D1 (de) 1995-10-12
DE4140987A1 (de) 1993-06-17
EP0546361A1 (fr) 1993-06-16

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