EP0143235B1 - Ventilateur axial sans couronne de guidage particulièrement pour la ventilation d'échangeurs de chaleur - Google Patents

Ventilateur axial sans couronne de guidage particulièrement pour la ventilation d'échangeurs de chaleur Download PDF

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Publication number
EP0143235B1
EP0143235B1 EP84111075A EP84111075A EP0143235B1 EP 0143235 B1 EP0143235 B1 EP 0143235B1 EP 84111075 A EP84111075 A EP 84111075A EP 84111075 A EP84111075 A EP 84111075A EP 0143235 B1 EP0143235 B1 EP 0143235B1
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Prior art keywords
housing part
ventilator
vane
impeller
guide ring
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Expired
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EP84111075A
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German (de)
English (en)
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EP0143235A1 (fr
EP0143235B2 (fr
Inventor
Manfred Dr. Sellmann
Walter Dipl.-Ing. Koch
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Siemens AG
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Siemens AG
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    • 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
    • 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 a stator-less axial fan, in particular for ventilation of heat exchangers, according to the preamble of claim 1; such an axial fan is known from DE-A-25 21 416.
  • the inside diameter of the housing piece, which connects to the housing part encasing the flow-active part of the fan, is increased by about 25% by leaps and bounds;
  • the required amount of air should leave the fan with a speed profile that is as uniform as possible and a swirl component that is as low as possible, as a result of which flow noises on the components that are subjected to flow and to be cooled remain small.
  • the maximum dimensions of such fans are prescribed for reasons of installation. Since the suction and pressure sides of the fans are still accessible, protective grilles must be fitted there for safety reasons, which in themselves conflict with the aforementioned requirements.
  • An axial fan is already known from DE-A-2 327 125, the housing of which is provided with an extension, which begins on the outflow side either steplessly or step-wise behind the impeller or already within the impeller area;
  • extension which begins on the outflow side either steplessly or step-wise behind the impeller or already within the impeller area;
  • rounded downstream corners of the blades in cooperation with a housing that has been expanded in a certain way are neither described nor illustrated. To reduce noise, only the lowest possible speed is used.
  • a construction has proven to be a particularly expedient construction design for the entire fan housing, which is provided with an abruptly expanded diffuser housing part, which is characterized in that an overall opening or diameter ratio of 1.03, ⁇ D 2 / D for the diffuser housing part a ⁇ 1.25 and a total axial length of 0.10 D a ⁇ 1 D ⁇ 0.5 D a is provided, where D a is approximately the inside width of the fan housing in the region of the impeller, and D 2 is the greatest diameter of the diffuser Designated housing part.
  • a technically particularly advantageous embodiment of the diffuser housing part is characterized in that for this housing part, a sudden expansion beginning behind the impeller with a pitch angle: 15 ° ⁇ 1 ⁇ 60 ° to a diameter of 1.02 D A ⁇ D 21 ⁇ D 2 and a subsequent gradual expansion with the pitch angle: 0 ° ⁇ a 2 ⁇ 10 ° to the diameter dimension D 2 is provided.
  • the diffuser housing part consists of a piece of pipe widened in the area of its extension by means of a corresponding stamp.
  • the impeller design provided according to the configuration deviates from the previously mentioned or generally recommended values, it has surprisingly been shown that the fan according to the invention with the special design parameters for the blade profile while observing the required values for volume flow and maximum pressure at a certain percentage this volume flow and given the maximum installation conditions and the lowest possible circumferential speed and a low hub ratio, tear phenomena in the impeller do not occur and the flow is closer to the state of a uniform speed distribution for a given volume flow than with larger, known hub ratios and that the absolute amount of this speed is lower.
  • the blade wheel design provided according to the invention with a high work distribution in the outer area of the blade in an unexpected manner in combination with the housing design according to the invention and wing edge rounding results in a further improvement with regard to the most uniform possible speed distribution with reduced peak values behind the fan and thus, despite the high conveying capacity, a further noise reduction, which is a total Allows a reduction of 3 to 4 dB (A).
  • a fan unit consisting essentially of a drive motor M with a fan wheel LR attached to its output shaft with blades S1-S8 is arranged in a surrounding housing, which consists of a first housing part G1 directly surrounding the fan unit M, LR and a second diffuser housing part G2.
  • a protective grille SG is attached to both the inlet and the outlet side of the housing.
  • a sudden expansion behind the impeller LR in the aforementioned sense is initially carried out with an embodiment of the invention for the diffuser housing part G2 Pitch angle: 15 ° ⁇ ⁇ 1 ⁇ 60 ° except for a diameter dimension: 0.4 D 2 ⁇ D 21 ⁇ D 2 , which is followed by a gradual expansion with a pitch angle: 0 ° ⁇ 2 ⁇ 10 ° to the diameter dimension D 2 connects;
  • a diffuser housing part designed in this way is expediently produced from a tube piece initially corresponding to the diameter dimension D A , which is widened by a stamping die having the external dimensions of the extension.
  • the total opening diameter ratio for the diffuser housing part G2 is: 1.03 ⁇ D A / D 2 ⁇ 1.25 and the total axial length is 0.10 D A ⁇ 1 D 0,5 0.5 D a provided, where D A denotes the inside width of the fan housing (first housing part G1) in the region of the impeller LR and D 2 the largest diameter of the diffuser housing part G2 on its outlet side.
  • the entire blade profile can be determined on the basis of the usual calculation methods for profiled blades of compressors and fans; the overlap ratios customary and recommended for the construction of axial impellers are to be used as a basis.

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

Claims (9)

1. Ventilateur axial sans couronne de guidage, en particulier pour l'aération d'échangeurs de chaleur, comportant au moins une première partie de carter entourant directement une unité de ventilateur et une seconde partie de carter à diffuseur s'y raccordant c'oté de fuite et possédant une section de passage libre qui croît brusquement, caractérisé par le fait qu'au moins les sommets sur le bord extérieur des aubes (S1-S8), situés du c'oté fuite de l'unité de ventilateur (M; LR) sont arrondis (rayon de courbure r), et que le début de la section de passage qui croît brusquement de la partie de carter à diffusion (G2) se situe à la distance de 0,3 18 par rapport à l'intersection entre le prolongement du bord arrière des aubes, d'une part, et la corde de l'aile, d'autre part, dans la zone des sommets de fuite des aubes (S1-S8) de la roue à aubes (LR), la valeur 1a désignant la longueur de la corde du profil, dans la coupe extérieure du profil, des aubes.
2. Ventilateur axial sans couronne de guidage, caractérisé par le fait que les sommets c'oté fuite des aubes (S1-S8) sont arrondis suivant un rayon de courbure: 0,1 1a ≤ r ≤ 0,3 1a.
3. Ventilateur axial sans couronne de guidage selon la revendication 1 ou 2, caractérisé par le fait qu'il est prévu, pour la partie de carter à diffusion (G2) un rapport d'ouverture totale ou un rapport de diamètres: 1 ,03 x D2/DA ≤ 1,25, relation dans laquelle DA est le diamètre de passage libre de l'élément de ventilateur (premier élément de ventilateur G1) dans la zone du rotor de la soufflante (LR) et D2 représente le plus grand diamètre de la partie de carter à diffuseur (G2).
4. Ventilateur axial sans couronne de guidage selon l'une des revendications 1-3, caractérisé par le fait qu'il est prévu pour l'élément de carter à diffuseur (G2) une longueur axiale totale: 0,10 DA ≤ 1D ≤ 0,5Da, relation dans laqelle DA représente le diamètre de passage libre du carter de ventilateur (première partie de ventilateur G1) au niveau du rotor de la soufflante (LR).
5. Ventilateur axial sans couronne de guidage selon l'une des revendications 1-4, caractérisé par le fait qu'il est prévu pour la partie de carter à diffuseur (G2) un accroissement brusque qui commence derrière le rotor de la soufflante (LR), avec un angle de pente: 15° 6 α1 ≤ 60°, jusqu'à un diamètre 0,04 DA < D21 ≤ D2 et un élargissement croissant progressivement et s'y raccordant, avec un angle de pente: 0° < α2 ≤ 10° jusqu'au diamètre D2.
6. Ventilateur axial sans couronne de guidage selon l'une des revendications 1-5, caractérisé par le fait que la partie de carter à diffuseur (G2), est constituée par une pièce tubulaire qui a été élargie, dans la zone de son élargissement, à l'aide d'un poinçon correspondant.
7. Ventilateur axial sans couronne de guidage selon l'une des revendications 1-6, caractérisé par le fait que la première partie de carter (G1) et la partie de carter à diffuseur (G2), constituent, ensemble, une pièce tubulaire d'un seul tenant.
8. Ventilateur axial sans couronne de guidage selon l'une des revendications 1-7, caractérisé par le fait que la partie de carter à diffuseur (G2) est pourvue, du c'oté de fuite, d'un grillage de protection (SG).
9. Ventilateur axial sans courant de guidage comportant, sur la périphérie du moyeu du rotor d'une unité de ventilateur, avec distribution uniforme ou non uniforme d'aubes profilées et gauchies, avec une ligne de squelette galbée de telle façon que le rapport (f/1) entre la hauteur du galbe (f) de la ligne de squelette et la forme de l'aube par rapport à l'écartement (1) entre le bord antérieur et le bord postérieur d'une aube, se situe dans la zone: 0,02 < f/1 ≤ 0,1, selon l'une des revendications 1-8, caractérisé par les paramètres de construction suivants pour le rotor de l'unité de ventilateur:
Figure imgb0004
avec les définitions suivantes:
Da=diamètre extérieur du rotor;
Di-diamètre du moyeu du rotor;
1a=longueur de la corde entre le bord antérieur et le bord postérieur du profil de l'aube, dans la coupe extérieure;
1i=longueur de la corde entre le bord antérieur et le bord postérieur du profil de l'aube dans la coupe intérieure;
γA=angle de réglage des aubes au niveau de la coupe extérieure d'une aube mesuré par rapport au sens périphérique (D) (sens de rotation);
γi=angle de réglage au niveau de la coupe intérieure d'une aube, mesuré par rapport au sens périphérique (D) (sens de rotation).
EP84111075A 1983-09-30 1984-09-17 Ventilateur axial sans couronne de guidage particulièrement pour la ventilation d'échangeurs de chaleur Expired - Lifetime EP0143235B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3335649 1983-09-30
DE19833335649 DE3335649A1 (de) 1983-09-30 1983-09-30 Leitradloser axialventilator, insbesondere zur belueftung von waermetauschern

Publications (3)

Publication Number Publication Date
EP0143235A1 EP0143235A1 (fr) 1985-06-05
EP0143235B1 true EP0143235B1 (fr) 1987-12-16
EP0143235B2 EP0143235B2 (fr) 1991-10-23

Family

ID=6210654

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84111075A Expired - Lifetime EP0143235B2 (fr) 1983-09-30 1984-09-17 Ventilateur axial sans couronne de guidage particulièrement pour la ventilation d'échangeurs de chaleur

Country Status (2)

Country Link
EP (1) EP0143235B2 (fr)
DE (2) DE3335649A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2227793B (en) * 1985-11-08 1990-10-31 Papst Motoren Gmbh & Co Kg Miniature axial fan
GB2185074B (en) * 1985-11-08 1990-12-19 Papst Motoren Gmbh & Co Kg Fan
FR2781843B1 (fr) * 1998-07-28 2000-10-20 Valeo Thermique Moteur Sa Helice de ventilateur compacte optimisee
EP2085709A1 (fr) * 2008-01-30 2009-08-05 LG Electronics Inc. Climatiseur
DE102014111767A1 (de) 2014-08-18 2016-02-18 Ebm-Papst Mulfingen Gmbh & Co. Kg Axialventilator

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3334807A (en) * 1966-03-28 1967-08-08 Rotron Mfg Co Fan
DE2327125C3 (de) * 1973-05-28 1979-11-15 Siemens Ag, 1000 Berlin Und 8000 Muenchen Axialventilator mit Gehäuse
DE2541416C3 (de) 1975-09-17 1985-06-27 Knorr-Bremse GmbH, 8000 München Führerbremsventileinrichtung, insbesondere von Schienenfahrzeugen

Also Published As

Publication number Publication date
EP0143235A1 (fr) 1985-06-05
EP0143235B2 (fr) 1991-10-23
DE3468134D1 (en) 1988-01-28
DE3335649A1 (de) 1985-04-18

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