EP0410271B1 - Dispositif de transport de milieu gazeux - Google Patents

Dispositif de transport de milieu gazeux Download PDF

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Publication number
EP0410271B1
EP0410271B1 EP90113649A EP90113649A EP0410271B1 EP 0410271 B1 EP0410271 B1 EP 0410271B1 EP 90113649 A EP90113649 A EP 90113649A EP 90113649 A EP90113649 A EP 90113649A EP 0410271 B1 EP0410271 B1 EP 0410271B1
Authority
EP
European Patent Office
Prior art keywords
impeller
blades
casing
centrifugal fan
inner contour
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
EP90113649A
Other languages
German (de)
English (en)
Other versions
EP0410271A3 (en
EP0410271A2 (fr
Inventor
Reinhold Hopfensperger
Rudolf Tungl
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.)
Motoren Ventilatoren Landshut GmbH
Original Assignee
Alcatel SEL AG
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
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Application filed by Alcatel SEL AG filed Critical Alcatel SEL AG
Publication of EP0410271A2 publication Critical patent/EP0410271A2/fr
Publication of EP0410271A3 publication Critical patent/EP0410271A3/de
Application granted granted Critical
Publication of EP0410271B1 publication Critical patent/EP0410271B1/fr
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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
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • 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
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings

Definitions

  • the invention relates to a device for conveying a gaseous medium in a device with high flow resistance.
  • the device with high flow resistance can be, for example, a ceramic surface burner, which has recently been used in gas boilers.
  • gas boilers with ceramic surface burners are known (magazine: HLH, heating, ventilation / air conditioning, building services; magazine of the Association of German Engineers for Technical Building Equipment; June 1989, page 308). They have a relatively high flow resistance, which is on the order of 200 Pascal and more.
  • the medium to be pumped can either be air or a combustible gas mixture.
  • a radial fan is known (CH-A-301 116), which shows an improved fan pressure housing. This consists of two pressed, dome-shaped housing parts that face each other with their concave sides and are welded together along their circumferential joint.
  • the known fan has a closed fan wheel, the lower part and upper part of which consist of a flat plate-shaped plate.
  • This known fan is unsuitable - if only because of its dimensions - for use with ceramic surface burners in gas boilers.
  • a radial blower for conveying gases that are very dusty is also known (DE-B-1, 204, 774), which is said to work with high efficiency.
  • the impeller has backward curved blades, the blade angles of which are approximately the same at the impeller inlet and at the impeller outlet.
  • FR-A-1, 396, 805 Another radial fan is known (FR-A-1, 396, 805), in which a measure for noise reduction has been carried out. It consists in that the gap between the impeller and the inner contour of the housing is wedge-shaped in the tongue area. In the description of this known radial fan, there is also no reference to the solution of the technical problem according to the application.
  • the invention is based on the technical problem of providing a device for conveying a gaseous medium in a device with high flow resistance, i.e. at which the pumped medium overcomes a relatively high back pressure and which has a steep pressure-volume flow characteristic, i.e. in the device, major changes in the pressure generated should only be accompanied by minor changes in the volume flow.
  • the inherent noise of the device must not exceed the inherent noise of known devices for conveying a gaseous medium.
  • the pumped gaseous medium has a pressure of 415 Pascal and a volume flow of 6.9 l / s at the intended operating point.
  • the speed of the fan wheel was about 3800 revolutions per minute.
  • the housing 1 of the radial fan is closed with the cover 2.
  • the housing 1 and cover are made of aluminum injection molding.
  • the cover 2 is screwed to the housing 1 at the edge with the interposition of a seal 3.
  • the drive motor 4 is flanged, the output shaft 5 of which projects into the housing 1.
  • the drive motor 4 shown is an electronically commutated DC motor. However, an AC motor can also be used.
  • the impeller 6 is fastened in a non-positive and / or positive manner.
  • the flow exit width of the impeller 6 is designated c.
  • the impeller 6 consists of the lower part 7 with the blades 8 integrally attached to it and the cover 9. In the exemplary embodiment shown, the length of the blade 8 is at the lower end, i.e. at the lower part 7, larger than at the upper end, i.e. near the lid 9.
  • the impeller 6 can be made of metal or plastic.
  • the gaseous medium is sucked in axially, ie through opening 10 in the cover 2, and blown out radially (into the image plane in FIG. 1).
  • the blow-out opening is present as a rectangular aperture in the circular flange 11.
  • the effective shape of the radial fan according to the invention is illustrated in FIG.
  • the housing 1 has the spiral-shaped inner contour 12.
  • the dimensions a and b in the exemplary embodiment shown are 156 mm.
  • the blades 8 are curved backwards, as can be seen from the comparison with the direction of rotation of the impeller 6 illustrated by the arrow 13.
  • the shape of the blades 8 corresponds essentially to circular arcs. They are arranged in such a way on the lower part 7 that the entry angle ⁇ 1 has almost the same value as the exit angle ⁇ 2. In the exemplary embodiment shown, they have the value of 47 angular degrees.
  • the tongue region 15 the gap between the fan wheel 6 and the inner contour 12 of the housing near the blow-out opening 14 is referred to as the tongue region 15.
  • the tongue area is wedge-shaped.
  • Fig. 3 shows the impeller 6 from the suction side.
  • the blades 8 on the lower part 7 can be seen through the opening 10 in the cover 2.
  • Fig. 4 again shows that the blades are 8 circular sections.
  • the base points of the radius of all circular sections lie on the circle 16.
  • the diameter of the circle 16 is 98 mm.

Landscapes

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

Claims (5)

  1. Dispositif de transport d'un milieu gazeux dans un dispositif à grande résistance à l'écoulement,
    caractérisé par un ventilateur radial présentant les attributs suivants:
    a) un carter (1) en forme de boisseau plat avec un contour intérieur (12) en forme de spirale,
    b) un couvercle sensiblement plan (2) avec une ouverture centrale de forme circulaire (10),
    c) un rotor fermé (6) dont le diamètre vaut plus de dix fois sa largeur (c) de sortie du flux,
    d) le rotor (6) est constitué d'une partie inférieure (7), sensiblement plane, d'une pluralité de pales (8) qui sont incurvées vers l'arrière, présentent la forme d'une portion de cercle dont la largeur à la périphérie du rotor est inférieure à ce qu'elle est à son extrémité intérieure, et un couvercle (9) de forme circulaire, en forme d'assiette plate, avec une ouverture centrale de forme circulaire,
    e) les pales (8) sont disposées dans le rotor (6) de façon que leur angle d'entrée (β1) et leur angle de sortie (β 2) présentent à peu près la même valeur,
    f) une fente en forme de coin dans la zone en languette (15) entre le rotor (6) et le contour intérieur (12) du carter (1).
  2. Ventilateur radial selon la revendication 1,
       caractérisé par le fait que la longueur des pales (8) est supérieure à la partie inférieure (7) qu'au couvercle (9).
  3. Ventilateur radial selon les revendications 1 et 2,
       caractérisé par le fait que les angles d'entrée et de sortie (β1, β2) des pales (8) présentent une valeur comprise entre 45 et 50 degrés.
  4. Ventilateur radial selon les revendications 1 à 3,
       caractérisé par le fait que l'endroit de la plus petite distance entre le rotor (6) et le contour intérieur (12) du carter (1) est décalé par rapport à la zone en languette (15) dans le sens de rotation du rotor (6) et s'étend à peu près sur un quart de la périphérie du carter (entre A et B).
  5. Ventilateur radial selon la revendication 1 à 4,
       caractérisé par le fait que la plus petite distance entre la périphérie du rotor et le contour intérieur (12) du carter (1) vaut entre 4 et 8% du rayon du rotor.
EP90113649A 1989-07-22 1990-07-17 Dispositif de transport de milieu gazeux Expired - Lifetime EP0410271B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3924281 1989-07-22
DE3924281A DE3924281A1 (de) 1989-07-22 1989-07-22 Vorrichtung zum foerdern eines gasfoermigen mediums

Publications (3)

Publication Number Publication Date
EP0410271A2 EP0410271A2 (fr) 1991-01-30
EP0410271A3 EP0410271A3 (en) 1991-08-07
EP0410271B1 true EP0410271B1 (fr) 1994-09-21

Family

ID=6385604

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90113649A Expired - Lifetime EP0410271B1 (fr) 1989-07-22 1990-07-17 Dispositif de transport de milieu gazeux

Country Status (3)

Country Link
EP (1) EP0410271B1 (fr)
JP (1) JPH0357899A (fr)
DE (2) DE3924281A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2196679A2 (fr) 2004-07-31 2010-06-16 ebm-papst Landshut GmbH Roue pour un ventilateur radiale

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0516073A1 (fr) * 1991-05-29 1992-12-02 Alcatel SEL Aktiengesellschaft Dispositif de transport d'un médium gazeux
DE4141360A1 (de) * 1991-12-14 1993-06-17 Sel Alcatel Ag Radialgeblaese zum foerdern eines brennbaren gasgemisches
DE4141359A1 (de) * 1991-12-14 1993-06-17 Sel Alcatel Ag Geblaeserad fuer radialgeblaese
DE4141362C2 (de) * 1991-12-14 2002-10-24 Motoren Ventilatoren Gmbh Radialgebläse mit Drosselvorrichtung
DE4242474A1 (de) * 1992-12-16 1994-06-23 Sel Alcatel Ag Vorrichtung zum Fördern eines gasförmigen Mediums
DE4318580A1 (de) * 1993-06-04 1994-12-08 Sel Alcatel Ag Radialgebläse
DE19516515A1 (de) * 1995-05-05 1996-11-07 Sel Alcatel Ag Radialgebläse
DE19602368A1 (de) * 1996-01-24 1997-07-31 Sel Alcatel Ag Radialgebläse
DE20012654U1 (de) * 2000-07-19 2000-09-21 MAP Medizintechnik für Arzt und Patient GmbH & Co. KG, 82152 Planegg Vorrichtung zur Zufuhr eines Atemgases
DE202005004180U1 (de) * 2005-03-14 2006-07-27 Ebm-Papst Landshut Gmbh Radialgebläse
EP2357365B1 (fr) * 2010-02-01 2016-11-16 Brink Climate Systems B.V. Système de mouvement d'air
CN103711713B (zh) * 2012-09-28 2016-08-24 昆山广兴电子有限公司 离心式散热扇
EP3530956B1 (fr) * 2018-02-26 2021-09-22 Honeywell Technologies Sarl Roue à aubes pour soufflante radiale et appareil à brûleur à gaz

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH301116A (de) * 1952-05-27 1954-08-31 Ag Hch Bertrams Ventilator-Druckgehäuse.
DE1204774B (de) * 1954-01-27 1965-11-11 Bruno Eck Dr Ing Radialgeblaese zur Foerderung stark staubhaltiger Gase
FR1396805A (fr) * 1964-05-28 1965-04-23 Svenska Flaektfabriken Ab Carter pour ventilateur centrifuge
GB2055969B (en) * 1979-07-19 1983-11-16 Sgm Co Inc Low noise centrifugal blower
DE3700230A1 (de) * 1987-01-07 1988-07-21 Hauni Werke Koerber & Co Kg Luefterrad

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2196679A2 (fr) 2004-07-31 2010-06-16 ebm-papst Landshut GmbH Roue pour un ventilateur radiale
US7794206B2 (en) 2004-07-31 2010-09-14 Emb-Papst Landshut Gmbh Radial fan impeller
US8109731B2 (en) 2004-07-31 2012-02-07 Ebm-Papst Landshut Gmbh Radial fan impeller

Also Published As

Publication number Publication date
JPH0357899A (ja) 1991-03-13
EP0410271A3 (en) 1991-08-07
DE3924281A1 (de) 1991-01-31
EP0410271A2 (fr) 1991-01-30
DE59007207D1 (de) 1994-10-27

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