EP1703139A1 - Centrifugal ventilator - Google Patents

Centrifugal ventilator Download PDF

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Publication number
EP1703139A1
EP1703139A1 EP06004223A EP06004223A EP1703139A1 EP 1703139 A1 EP1703139 A1 EP 1703139A1 EP 06004223 A EP06004223 A EP 06004223A EP 06004223 A EP06004223 A EP 06004223A EP 1703139 A1 EP1703139 A1 EP 1703139A1
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EP
European Patent Office
Prior art keywords
radial fan
fan according
housing
housing part
side part
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Granted
Application number
EP06004223A
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German (de)
French (fr)
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EP1703139B1 (en
Inventor
Rudolf Tungl
Roland Keber
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Ebm Papst Landshut GmbH
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Ebm Papst Landshut GmbH
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Publication of EP1703139A1 publication Critical patent/EP1703139A1/en
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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
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers 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
    • F04D29/40—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
    • F04D29/422—Discharge tongues

Definitions

  • the invention relates to a radial fan with a side part and a pot-like housing part having housing and a fan arranged in the housing, with radially extending blades.
  • Such devices for conveying gaseous media are generally used in devices which have a large flow resistance.
  • These can be ceramic surface burners, which are used in the latest development in gas boilers.
  • Such gas boilers have a flow resistance of the order of 200 pascals and more. To overcome the large flow resistance, efforts are being made to produce the steepest possible pressure volume flow characteristics in a radial fan.
  • Radial blower of the type mentioned are known in the art. So is in the EP 0 410 271 A2 a device for conveying a gaseous medium known in which the housing part has a holder for the electric motor and the side part is provided with an inlet opening for the influx of the blower air.
  • the invention has for its object to provide a radial fan, which is particularly space-saving, inexpensive and easy to manufacture with the same performance.
  • the shape in the housing part is greater than in the side part.
  • the ratio height / diameter of the housing between 1: 7 and 1: 9 is selected. It is particularly advantageous if the ratio height / diameter of the housing is 1: 8.
  • a favorable embodiment can provide that the blow-out channel is formed on the housing part.
  • the housing has a protruding into the pressure chamber in tongue. It is favorable that the tongue is formed on the housing part in the form of a ramp which rises on the side wall of the housing part in the flow direction. By attaching a tongue, the pressure chamber is shielded in the blower against the fan, so that pressure losses can be reduced.
  • the tongue may be formed on the side part in the form of a ramp and to rise in the direction of flow toward the housing part.
  • the tongue By forming the tongue as a ramp, the gap between fan and side wall of the housing part can be reduced, without causing an increase in the noise level.
  • blower in a further embodiment of the blower can be provided to use a fan with a hub and a front cover plate, in which case the blades of the fan are held only on the hub and the cover plate.
  • a rear carrier disc can be omitted. This results in a cost-effective production of the fan and thus the radial fan as a whole.
  • a radial fan is shown in side view, which has a housing 4 in which a fan 5 is received.
  • the housing 4 consists of a side part 2 and a pot-like housing part 3.
  • an electric motor 7 is vibration-damped, which drives the fan 5 via its motor shaft.
  • the housing has a, in connection with FIG. 3 described in detail pressure chamber 8.
  • the fan 5 forms together with the pressure chamber 8, as also explained in more detail in Fig. 3, an idealized Venturi nozzle, wherein the narrowest cross-section of this Venturi nozzle is located in the transition between the fan and the housing.
  • the formation 19 is larger in the illustrated embodiment in the housing part 3 as in the side part. 2
  • Fig. 2 is a Forderansicht the radial fan is shown.
  • the blower on a blow-out 13 and a suction port 20 As can be seen in the intake, it is in the illustrated embodiment is a fan with backward curved blades.
  • a connection 12 in the form of a flange 12 is provided.
  • the blower housing 4 is shown schematically, in which the fan 5 is used.
  • the spiral pressure chamber is shielded in the region of the blow-out channel 13 by the tongue 14 against the fan 5.
  • ⁇ 3.6 °
  • the ratio H (largest blade height) to D (diameter of the spiral) in the illustrated embodiment is 0.12. It has been found during test series that deviations from this ratio still provide useful results, however, the value of 0.12 for a spiral diameter of 145.3 mm and a required volumetric flow rate of 11 I / s is the optimum measure. This power is achieved at a speed of 5250 rpm and a shaft power of 21 W.
  • Fig. 4 the Venturi nozzle principle is shown schematically, the area 9 as a fan wheel space in addition to the speed of the fan through the structural design, further accelerating the air flow causes, whereas the pressure chamber 8 causes the pressure increase and calm the air flow ,
  • the fan 5 is provided with a hub 17, wherein the blades 6 are held on the hub 17 and on a cover plate 18. It is understood that according to desired performance requirements, other fan wheels can be used.

Abstract

The casing (4) has a side portion (2), pot-shaped casing portion (3) to form a casing scroll and a pressure chamber. The chamber has an impeller wheel (5) with radially extending blades. The ratio of the greatest blade height (H) to the greatest diameter (D) of the scroll is between 0.08-0.3.

Description

Die Erfindung betrifft ein Radialgebläse mit einem ein Seitenteil und ein topfartiges Gehäuseteil aufweisenden Gehäuse und einem in dem Gehäuse angeordneten Lüfterrad, mit sich radial erstreckenden Schaufeln.The invention relates to a radial fan with a side part and a pot-like housing part having housing and a fan arranged in the housing, with radially extending blades.

Derartige Vorrichtungen zum Fördern von gasförmigen Medien werden in der Regel eingesetzt in Vorrichtungen, die einen großen Strömungswiderstand besitzen. Es kann sich dabei um keramische Flächenbrenner handeln, die in der neuesten Entwicklung in Gaskesseln verwendet werden. Derartige Gasheizkessel weisen einen Strömungswiderstand in der Größenordnung von 200 Paskal und mehr auf. Zur Überwindung des großen Strömungswiderstands ist man bestrebt, möglichst steile Druckvolumen-Stromkennlinien bei einem Radialgebläse zu erzeugen.Such devices for conveying gaseous media are generally used in devices which have a large flow resistance. These can be ceramic surface burners, which are used in the latest development in gas boilers. Such gas boilers have a flow resistance of the order of 200 pascals and more. To overcome the large flow resistance, efforts are being made to produce the steepest possible pressure volume flow characteristics in a radial fan.

Radialgebläse der genannten Gattung sind im Stand der Technik bekannt. So ist in der EP 0 410 271 A2 eine Vorrichtung zum Fördern eines gasförmigen Mediums bekannt, bei dem das Gehäuseteil eine Halterung für den Elektromotor aufweist und das Seitenteil mit einer Einlassöffnung für den Zustrom der Gebläseluft versehen ist.Radial blower of the type mentioned are known in the art. So is in the EP 0 410 271 A2 a device for conveying a gaseous medium known in which the housing part has a holder for the electric motor and the side part is provided with an inlet opening for the influx of the blower air.

Der Erfindung liegt die Aufgabe zugrunde, ein Radialgebläse anzugeben, das bei möglichst gleicher Leistung besonders raumsparend, kostengünstig und einfach herzustellen ist.The invention has for its object to provide a radial fan, which is particularly space-saving, inexpensive and easy to manufacture with the same performance.

Die Aufgabe wird bei einem Gebläse der genannten Gattung durch die im Anspruch 1 angegebenen Merkmale gelöst.The object is achieved in a fan of the type mentioned by the features specified in claim 1.

Die erfindungsgemäße Lösung sieht daher vor, ein Radialgebläse mit einem ein Seitenteil und ein topfartiges Gehäuseteil aufweisendes Gehäuse zu schaffen, mit einem darin angeordneten Lüfterrad, einem am Seitenteil angeordneten Elektromotor und mit einem von Gehäuseteil und Seitenteil gebildeten Druckraum, der mit dem Lüfterrad-Raum zwischen den Schaufeln im Querschnitt eine Düse nach Art einer Venturi-Düse bildet, wobei das Verhältnis größte Schaufelhöhe (H) / größter Durchmesser (D) der Spirale im Wesentlichen zwischen H/D = 0,08 und H/D = 0,3 beträgt. Durch die besondere Gestaltung der Druckraumgeometrie und der Auslegung der Schaufeln des Lüfterrads im Verhältnis zum Durchmesser der Spirale des Druckraums, werden die gewünschten Leistungen in hervorragender Weise erreicht. Vorzugsweise beträgt das Verhältnis H/D = 0,1, besonders bevorzugt beträgt jedoch das Verhältnis H/D = 0,12. Dies entspricht bei einer konstruktiven Ausgestaltung einem größten Durchmesser von ca. 145,3 mm bei einer Schaufelhöhe von 18 mm.The solution according to the invention therefore provides for providing a radial fan with a housing having a side part and a cup-shaped housing part, with a fan wheel arranged therein, an electric motor arranged on the side part and with a pressure chamber formed by the housing part and side part which is connected to the fan wheel space between the blade forms in cross-section a nozzle in the manner of a Venturi nozzle, wherein the ratio of the largest blade height (H) / largest diameter (D) of the spiral is substantially between H / D = 0.08 and H / D = 0.3. Due to the special design of the pressure chamber geometry and the design of the blades of the fan in relation to the diameter of the spiral of the pressure chamber, the desired performance can be achieved in an excellent manner. Preferably, the ratio H / D = 0.1, more preferably, however, the ratio H / D = 0.12. This corresponds to a design of a largest diameter of about 145.3 mm with a blade height of 18 mm.

Besonders vorteilhaft ist es, wenn im Gehäuseteil und/oder im Seitenteil Ausformungen ausgebildet sind, durch die sich der spiralenförmige Druckraum kontinuierlich dreidimensional erweitert.It is particularly advantageous if formations are formed in the housing part and / or in the side part through which the spiral-shaped pressure chamber widens continuously in three dimensions.

Vorzugsweise ist die Ausformung im Gehäuseteil größer als im Seitenteil. Durch die Wahl der Gehäusegestalt und die Anordnung der größeren Ausformung im Gehäuseteil ergibt sich die Möglichkeit, auf der dem Motor abgewandten Seite des GebläseGehäuses in gewünschter Weise Ausformungen anzubringen, ohne dass eine räumliche Einschränkung gegeben wäre.Preferably, the shape in the housing part is greater than in the side part. By choosing the housing shape and the arrangement of the larger shape in the housing part, there is the possibility to attach on the side facing away from the engine of the blower housing in the desired manner, without a spatial restriction would be given.

Günstigerweise wird das Verhältnis Höhe/Durchmesser des Gehäuses zwischen 1:7 und 1:9 gewählt. Besonders vorteilhaft ist es, wenn das Verhältnis Höhe/Durchmesser des Gehäuses 1:8 beträgt.Conveniently, the ratio height / diameter of the housing between 1: 7 and 1: 9 is selected. It is particularly advantageous if the ratio height / diameter of the housing is 1: 8.

Besonders vorteilhaft ist es, wenn bei einer Drehzahl von n = 5250 ein Luftvolumenstrom von 11 L/s geliefert wird. Dabei ergibt sich eine Luftleistungskennzahl von pa = 1050 (Druck), der bei einer Drehzahl von 5250 und dem genannten Luftvolumenstrom von 11 L/s eine Wellenleistung von ca. 21 W erfordert. Dies ist im Vergleich zum Stand der Technik ein sehr niedriger Wert.It is particularly advantageous if, at a speed of n = 5250, an air volume flow of 11 L / s is supplied. This results in an air flow rate of pa = 1050 (pressure), which requires a shaft power of about 21 W at a speed of 5250 and the said air volume flow of 11 L / s. This is a very low value compared to the prior art.

Eine weitere vorteilhafte Ausgestaltung ist darin zu sehen, dass die Ebene des Anschlusses am Ausblaskanal des Gehäuses in einem Winkel α≤90° zur Ausblasrichtung (Pfeil A) steht. Besonders vorteilhaft ist es, wenn der Winkel zwischen 90° und 83° liegt, wobei besonders bevorzugt α = 86,4° beträgt.A further advantageous embodiment can be seen in the fact that the plane of the connection at the outlet channel of the housing is at an angle α≤90 ° to the discharge direction (arrow A). It is particularly advantageous if the angle lies between 90 ° and 83 °, with α = 86.4 ° being particularly preferred.

Eine günstige Ausführungsform kann vorsehen, dass der Ausblaskanal am Gehäuseteil ausgebildet ist.A favorable embodiment can provide that the blow-out channel is formed on the housing part.

Von besonderem Vorteil ist, dass das Gehäuse eine in den Druckraum hinein ragende Zunge aufweist. Dabei ist es günstig, dass die Zunge am Gehäuseteil in Form einer Rampe ausgebildet ist, die auf der Seitenwand des Gehäuseteils in Strömungsrichtung ansteigt. Durch die Anbringung einer Zunge wird der Druckraum im Ausblasbereich gegen das Lüfterrad abgeschirmt, so dass Druckverluste reduziert werden können.It is particularly advantageous that the housing has a protruding into the pressure chamber in tongue. It is favorable that the tongue is formed on the housing part in the form of a ramp which rises on the side wall of the housing part in the flow direction. By attaching a tongue, the pressure chamber is shielded in the blower against the fan, so that pressure losses can be reduced.

Bei einer anderen Ausführungsform kann es vorteilhaft sein, dass die Zunge am Seitenteil in Form einer Rampe ausgebildet ist und in Strömungsrichtung zum Gehäuseteil hin ansteigt. Durch die Ausbildung der Zunge als Rampe kann der Spalt zwischen Lüfterrad und Seitenwand des Gehäuseteils verringert werden, ohne dass es zu einem Ansteigen des Geräuschpegels kommt.In another embodiment, it may be advantageous for the tongue to be formed on the side part in the form of a ramp and to rise in the direction of flow toward the housing part. By forming the tongue as a ramp, the gap between fan and side wall of the housing part can be reduced, without causing an increase in the noise level.

Bei einer weiteren Ausführungsform des Gebläses kann vorgesehen sein, ein Lüfterrad mit einer Nabe und einer vorderen Deckscheibe zu verwenden, wobei dann die Schaufeln des Lüfterrads lediglich an der Nabe und der Deckscheibe gehalten sind. Eine rückwärtige Trägerscheibe kann entfallen. Hierdurch ergibt sich eine kostengünstige Herstellung des Lüfterrads und somit des Radialgebläses insgesamt.In a further embodiment of the blower can be provided to use a fan with a hub and a front cover plate, in which case the blades of the fan are held only on the hub and the cover plate. A rear carrier disc can be omitted. This results in a cost-effective production of the fan and thus the radial fan as a whole.

Im Folgenden wird die Erfindung anhand in der Zeichnung dargestellter Ausführungsbeispiele näher erläutert. Es zeigen:

Fig. 1
eine Seitenansicht eines Radialgebläses,
Fig. 2
eine Forderansicht auf das Radialgebläse mit Motor und Anschlussflansch,
Fig. 3
eine schematische Darstellung mit Druckraum, und
Fig. 4
eine schematische Darstellung der Zuordung Lüfterrad-Raum - Druckraum im Schnitt.
In the following the invention will be explained in more detail with reference to embodiments shown in the drawing. Show it:
Fig. 1
a side view of a radial fan,
Fig. 2
a Forderansicht on the radial fan with motor and flange,
Fig. 3
a schematic representation with pressure chamber, and
Fig. 4
a schematic representation of the assignment fan wheel space - pressure chamber in section.

In Fig. 1 ist ein Radialgebläse in Seitenansicht dargestellt, das ein Gehäuse 4 aufweist, in dem ein Lüfterrad 5 aufgenommen ist. Das Gehäuse 4 besteht aus einem Seitenteil 2 und einem topfartigen Gehäuseteil 3. An dem Seitenteil 2 ist ein Elektromotor 7 schwingungsgedämpft gehalten, der über seine Motorwelle das Lüfterrad 5 antreibt. Das Gehäuse weist einen, in Verbindung mit Fig. 3 näher beschriebenen Druckraum 8 auf. Das Lüfterrad 5 bildet zusammen mit dem Druckraum 8, wie ebenfalls in Fig. 3 näher erläutert, eine idealisierte Venturi-Düse, wobei der engste Querschnitt dieser Venturi-Düse im Übergang zwischen Lüfterrad und Gehäuse liegt.In Fig. 1, a radial fan is shown in side view, which has a housing 4 in which a fan 5 is received. The housing 4 consists of a side part 2 and a pot-like housing part 3. On the side part 2, an electric motor 7 is vibration-damped, which drives the fan 5 via its motor shaft. The housing has a, in connection with FIG. 3 described in detail pressure chamber 8. The fan 5 forms together with the pressure chamber 8, as also explained in more detail in Fig. 3, an idealized Venturi nozzle, wherein the narrowest cross-section of this Venturi nozzle is located in the transition between the fan and the housing.

Im Gehäuseteil 3 und/oder im Seitenteil 2 sind Ausformungen 19 ausgebildet, durch die sich der spiralenförmige Druckraum 8 kontinuierlich dreidimensional erweitert.In the housing part 3 and / or in the side part 2 formations 19 are formed through which the spiral-shaped pressure chamber 8 extends continuously in three dimensions.

Die Ausformung 19 ist im dargestellten Ausführungsbeispiel im Gehäuseteil 3 größer als im Seitenteil 2.The formation 19 is larger in the illustrated embodiment in the housing part 3 as in the side part. 2

In Fig. 2 ist eine Forderansicht des Radialgebläses dargestellt. Das Gebläse einen Ausblaskanal 13 und eine Ansaugöffnung 20 auf. Wie in der Ansaugöffnung zu erkennen ist, handelt es sich bei dem dargestellten Ausführungsbeispiel um ein Lüfterrad mit rückwärts gekrümmten Schaufeln. Am freien Ende des Ausblaskänals 13 ist ein Anschluss 12 in Form eines Flansches 12 vorgesehen. Die Ebene 11 des Anschlusses 12 bildet im dargestellten Ausführungsbeispiel mit der theoretischen Ausblasrichtung - Pfeil A - einen Winkel α ≤ 90°. In einer besonders bevorzugten Ausführungsform beträgt der Winkel α = 86,4°. Durch diese Anordnung wird der austretende Luftstrom noch weiter druckvermindernd geführt, da durch die winkelmäßige Anordnung zwischen Kanalfortsetzung und Ausblaskanal die Spiralkontur des Gebläses fortgesetzt wird. Hiermit geht gleichzeitig eine Druckerhöhung einher. In der zeichnerischen Darstellung laufen die theoretische Ausblasrichtung - Pfeil A - und die Seitenwand 16 des Kanals - durch zwei Parallelstriche gekennzeichnet - parallel zueinander. Ebenso - verlaufen die senkrechte Mittelachse des Gebläses und die Ebene 11 parallel zueinander.In Fig. 2 is a Forderansicht the radial fan is shown. The blower on a blow-out 13 and a suction port 20. As can be seen in the intake, it is in the illustrated embodiment is a fan with backward curved blades. At the free end of the Ausblaskänals 13 a connection 12 in the form of a flange 12 is provided. The plane 11 of the terminal 12 forms in the illustrated embodiment with the theoretical blow-out direction - arrow A - an angle α ≤ 90 °. In a particularly preferred embodiment, the angle α = 86.4 °. By this arrangement, the exiting air flow is performed even further pressure reducing, since the spiral contour of the fan is continued by the angular arrangement between the channel continuation and blow-out. This is accompanied by an increase in pressure at the same time. In the diagram, the theoretical discharge direction - arrow A - and the side wall 16 of the channel - indicated by two parallel lines - run parallel to one another. As well - the vertical center axis of the fan and the plane 11 are parallel to each other.

In Fig. 3 ist schematisch das Gebläse-Gehäuse 4 dargestellt, in dem das Lüfterrad 5 eingesetzt ist. Der spiralförmige Druckraum wird im Bereich des Ausblaskanals 13 durch die Zunge 14 gegen das Lüfterrad 5 abgeschirmt. In dieser Darstellung ist mit β = 3,6° der Komplementärwinkel zu dem Winkel α eingezeichnet.In Fig. 3, the blower housing 4 is shown schematically, in which the fan 5 is used. The spiral pressure chamber is shielded in the region of the blow-out channel 13 by the tongue 14 against the fan 5. In this illustration, with β = 3.6 °, the complementary angle to the angle α is drawn.

Erfindungsgemäß beträgt das Verhältnis H (größte Schaufelhöhe) zu D (Durchmesser der Spirale) im dargestellten Ausführungsbeispiel 0,12. Es hat sich während Testserien herausgestellt, dass Abweichungen von diesem Verhältnis noch brauchbare Ergebnisse liefern, jedoch ist der Wert 0,12 bei einem Spiraldurchmesser von 145,3 mm und einer geforderten Volumenstromkennzahl von 11 I/s das optimale Maß. Diese Leistung wird erreicht bei einer Drehzahl von 5250 U/min und einer Wellenleistung von 21 W.According to the invention, the ratio H (largest blade height) to D (diameter of the spiral) in the illustrated embodiment is 0.12. It has been found during test series that deviations from this ratio still provide useful results, however, the value of 0.12 for a spiral diameter of 145.3 mm and a required volumetric flow rate of 11 I / s is the optimum measure. This power is achieved at a speed of 5250 rpm and a shaft power of 21 W.

In Fig. 4 ist schematisch das Venturi-Düsen-Prinzip wiedergegeben, wobei der Bereich 9 als Lüfterrad-Raum zusätzlich zur Drehzahl des Lüfterrads durch die konstruktive Gestaltung, eine weitere Beschleunigung des Luftstroms bewirkt, wohingegen der Druckraum 8 die Druckerhöhung und Beruhigung des Luftstroms herbeiführt.In Fig. 4, the Venturi nozzle principle is shown schematically, the area 9 as a fan wheel space in addition to the speed of the fan through the structural design, further accelerating the air flow causes, whereas the pressure chamber 8 causes the pressure increase and calm the air flow ,

Bei der in den Figuren dargestellten Ausführungsform ist, wie schematisch in Fig. 4 wiedergegeben, das Lüfterrad 5 mit einer Nabe 17 versehen, wobei die Schaufeln 6 an der Nabe 17 und an einer Deckscheibe 18 gehalten sind. Es versteht sich, dass entsprechend gewünschter Leistungsanforderungen auch andere Lüfterräder Verwendung finden können.In the embodiment shown in the figures, as schematically shown in Fig. 4, the fan 5 is provided with a hub 17, wherein the blades 6 are held on the hub 17 and on a cover plate 18. It is understood that according to desired performance requirements, other fan wheels can be used.

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

11
Radialgebläsecentrifugal blower
22
Seitenteilside panel
33
topfartiges Gehäuseteilcup-shaped housing part
44
Gehäusecasing
55
Lüfterradfan
66
Schaufelnshovel
77
Elektromotorelectric motor
88th
Druckraumpressure chamber
99
Lüfterrad-RaumFan room
1010
Düsejet
1111
Ebene des Anschlusses 12Level of connection 12
1212
Anschlussconnection
1313
Ausblaskanalblow-out
Pfeil AArrow A.
AusblasrichtungDischarge
1414
Zungetongue
1515
Ramperamp
1616
Seitenwand des Gehäuseteils 3Side wall of the housing part 3
1717
Nabehub
1818
Deckscheibecover disc

Claims (16)

Radialgebläse (1) mit einem ein Seitenteil (2) und ein topfartiges Gehäuseteil (3) aufweisenden Gehäuse (4), einem darin angeordnetem Lüfterrad (5) mit sich radial erstreckenden Schaufeln (6), einem am Seitenteil angeordneten Elektromotor (7) und mit einem von Gehäuseteil und Seitenteil gebildeten Druckraum (8), der mit dem Lüfterrad-Raum zwischen den Schaufeln (6) im Querschnitt eine Düse (8') nach Art einer Venturi-Düse bildet, und das Verhältnis größte Schaufelhöhe (H)/größter Durchmesser (D) der Spirale im wesentlichen zwischen H/D = 0,08 und H/D = 0,3 beträgt.Radial fan (1) comprising a housing (4) having a side part (2) and a cup-shaped housing part, a fan wheel (5) arranged therein with radially extending blades (6), an electric motor (7) arranged on the side part and a pressure chamber (8) formed by housing part and side part, which forms with the fan space between the blades (6) in cross-section a nozzle (8 ') in the manner of a Venturi nozzle, and the ratio of largest blade height (H) / largest diameter (D) the spiral is substantially between H / D = 0.08 and H / D = 0.3. Radialgebläse nach Anspruch 1, dadurch gekennzeichnet, dass das Verhältnis größte Schaufelhöhe (H)/größter Durchmesser (D) der Spirale vorzugsweise im wesentlichen H/D = 0,1, besonders bevorzugt H/D = 0,12 beträgt.Radial fan according to claim 1, characterized in that the ratio of the largest blade height (H) / largest diameter (D) of the spiral is preferably substantially H / D = 0.1, more preferably H / D = 0.12. Radialgebläse nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass im Gehäuseteil (3) und/oder im Seitenteil (2) Ausformungen (19) ausgebildet sind, durch die sich der spiralenförmige Druckraum (8) kontinuierlich dreidimensional erweitert.Radial fan according to claim 1 or 2, characterized in that in the housing part (3) and / or in the side part (2) formations (19) are formed through which the spiral-shaped pressure chamber (8) extends continuously in three dimensions. Radialgebläse nach Anspruch 3, dadurch gekennzeichnet, dass die Ausformung (19) im Gehäuseteil (3) größer ist als im Seitenteil (2).Radial fan according to claim 3, characterized in that the formation (19) in the housing part (3) is greater than in the side part (2). Radialgebläse nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass das Verhältnis Höhe/Durchmesser des Gehäuses (4) zwischen 1:7 und 1:9 beträgtRadial fan according to one of the preceding claims, characterized in that the ratio height / diameter of the housing (4) is between 1: 7 and 1: 9 Radialgebläse nach Anspruch 5, dadurch gekennzeichnet, dass das Verhältnis Höhe/Durchmesser des Gehäuses (4) im wesentlichen 1:8 beträgt.Radial fan according to claim 5, characterized in that the ratio height / diameter of the housing (4) is substantially 1: 8. Radialgebläse nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass bei einer Drehzahl von ca. n=5250 ein Luftvolumenstrom von ca. 11 l/s geliefert wird.Radial fan according to one of the preceding claims, characterized in that at a speed of about n = 5250 an air flow of about 11 l / s is delivered. Radialgebläse nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass die Luftleistungskennzahlen l/s= 11 (Volumenstrom) und Pa=1050 (Druck) bei einer Drehzahl n=5250 und einer Wellenleistung von ca. 21 W erzielt werden.Radial fan according to one of the preceding claims, characterized in that the air performance characteristics l / s = 11 (volume flow) and Pa = 1050 (pressure) are achieved at a speed n = 5250 and a shaft power of about 21 W. Radialgebläse nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass die Ebene (11) des Anschlusses (12) am Ausblaskanal (13) des Gehäuses (4) in einem Winkel α ≤ 90° zur Ausblasrichtung (Pfeil A) steht.Radial fan according to one of the preceding claims, characterized in that the plane (11) of the connection (12) on the exhaust duct (13) of the housing (4) at an angle α ≤ 90 ° to the discharge direction (arrow A). Radialgebläse nach Anspruch 9, dadurch gekennzeichnet, dass die Ebene des Anschlusses (12) am Ausblaskanal (13) des Gehäuses (4) in einem Winkel 90° > α ≥ 83°, vorzugsweise α = 86,4° zur Ausblasrichtung (Pfeil A) steht.Radial fan according to claim 9, characterized in that the plane of the connection (12) at the outlet channel (13) of the housing (4) at an angle 90 °> α ≥ 83 °, preferably α = 86.4 ° to the discharge direction (arrow A) stands. Radialgebläse nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass der Ausblaskanal (13) am Gehäuseteil (3) ausgebildet ist.Radial fan according to one of the preceding claims, characterized in that the blow-out channel (13) on the housing part (3) is formed. Radialgebläse nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass das Gehäuse (4) eine in den Druckraum (8) hinein ragende Zunge (14) aufweist.Radial fan according to one of the preceding claims, characterized in that the housing (4) has a in the pressure chamber (8) projecting into tongue (14). Radialgebläse nach Anspruch 12, dadurch gekennzeichnet, dass die Zunge (14) am Gehäuseteil (3) in Form einer Rampe (15) ausgebildet ist, die auf der Seitenwand (16) des Gehäuseteils (3) in Strömungsrichtung ansteigt.Radial fan according to claim 12, characterized in that the tongue (14) on the housing part (3) in the form of a ramp (15) is formed, which rises on the side wall (16) of the housing part (3) in the flow direction. Radialgebläse nach Anspruch 12, dadurch gekennzeichnet, dass die Zunge (14) am Seitenteil (2) in Form einer Rampe (15) ausgebildet ist und in Strömungsrichtung zum Gehäuseteil (3) hin ansteigt.Radial fan according to claim 12, characterized in that the tongue (14) on the side part (2) in the form of a ramp (15) is formed and in the flow direction to the housing part (3) increases towards. Radialgebläse nach mindestens einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass das Lüfterrad (5) eine Nabe (17) und mindestens eine Deckscheibe (18) aufweist.Radial fan according to at least one of the preceding claims, characterized in that the fan wheel (5) has a hub (17) and at least one cover plate (18). Radialgebläse nach Anspruch 15, dadurch gekennzeichnet, dass nur eine Deckscheibe (18) an dem Lüfterrad (5) vorhanden ist, und die Schaufeln (8) nur an der Nabe (17) und an der einzigen Deckscheibe (8) gehalten sind.Radial fan according to claim 15, characterized in that only one cover disc (18) on the fan wheel (5) is present, and the blades (8) are held only on the hub (17) and on the single cover disc (8).
EP06004223A 2005-03-14 2006-03-02 Centrifugal ventilator Active EP1703139B1 (en)

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US8257034B2 (en) 2012-09-04
DE202005004180U1 (en) 2006-07-27
DE502006008789D1 (en) 2011-03-10
EP1703139B1 (en) 2011-01-26
US20060204382A1 (en) 2006-09-14
ATE497109T1 (en) 2011-02-15
ES2360580T3 (en) 2011-06-07

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