EP1544472A2 - Duct blower - Google Patents

Duct blower Download PDF

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Publication number
EP1544472A2
EP1544472A2 EP04029400A EP04029400A EP1544472A2 EP 1544472 A2 EP1544472 A2 EP 1544472A2 EP 04029400 A EP04029400 A EP 04029400A EP 04029400 A EP04029400 A EP 04029400A EP 1544472 A2 EP1544472 A2 EP 1544472A2
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EP
European Patent Office
Prior art keywords
fan according
impeller
pipe fan
guide
pipe
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
EP04029400A
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German (de)
French (fr)
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EP1544472A3 (en
EP1544472B1 (en
Inventor
Gerhard Ruck
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Ruck Ventilatoren GmbH
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Ruck Ventilatoren GmbH
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Publication date
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Publication of EP1544472A2 publication Critical patent/EP1544472A2/en
Publication of EP1544472A3 publication Critical patent/EP1544472A3/en
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Publication of EP1544472B1 publication Critical patent/EP1544472B1/en
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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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • F04D29/542—Bladed diffusers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/06—Helico-centrifugal 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
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/16—Centrifugal pumps for displacing without appreciable compression
    • F04D17/165—Axial entry and discharge
    • 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
    • F04D29/284—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for compressors
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/663—Sound attenuation
    • F04D29/664—Sound attenuation by means of sound absorbing material

Definitions

  • the invention relates to a fan with rotationally symmetrical Housing for conveying air or other gases.
  • Such fans are especially at the beginning, within or used at the end of pipelines. They will therefore often called tube fans.
  • the operational area of the However, pipe fan according to the invention is limited not just for use in piping systems.
  • Tube fans There are a number of different constructions of Tube fans known.
  • a first kind of Pipe fans is a backward curved radial impeller in accommodated on a bulbous housing.
  • a second kind of tube fans also has an onion-shaped Casing.
  • a support disk and a number of two-dimensionally curved, not profiled Shovels existing diagonal impeller closes radially aligned distributor.
  • a diagonal impeller, consisting from a support disk and a number two-dimensional curved, not profiled sheet metal blades, and one itself axially adjoining diffuser possesses a third type of Duct fans.
  • the tubular fan according to the invention is characterized that the diagonal fan, consisting of cover disk, Support disc and a number of these two discs attached blades in the axial direction of a nozzle is downstream.
  • the impeller blades and the guide vanes of the pipe fan according to the invention can be curved in three dimensions and be profiled to the different angles of incidence along the leading edges to be able to account for the blades.
  • the profiling is a substantially steady increase in the Blade cross section up to a maximum and one on it subsequent substantially continuous decrease of the blade cross-section.
  • the pipe ventilator according to the invention needs in particular then to have no inlet nozzle when the impeller cover disc expanded nozzle-shaped.
  • the seal between suction and Pressure chamber can take place at the impeller outlet.
  • a diffuser To further Increasing the pressure conversion from dynamic to static Pressure can be connected downstream of the diffuser a diffuser.
  • the housing of the tube fan can ideally consist of a be made of one-piece cylindrical tube.
  • the tube fan 10 has an outer housing shell 12, which encloses a circular cylindrical, straight cylinder interior. At its left and right end each End wall 14, 16 are outside of the housing shell 12 each one left and right flange 18, 20 firmly attached to the housing shell 12 protrude in the axial direction (axis 22). through these flanges 18, 20 can at both ends of the housing shell 12 and thus at the tube fan 10 each have a tube 24, 26 connected to a pipe not shown become.
  • the tube fan 10 can thus between the tubes 24, 26 are installed.
  • the outer diameter 28 and 30, respectively the tubes 24 and 26 thus corresponds in present example also the outer diameter 32 of the housing shell 12.
  • the tubes 24, 26 could also each one have the outer diameter deviating from the diameter 32 and via a corresponding pipe adapter to the pipe fan be connected.
  • the tube fan 10 has a diagonal impeller 40, the input side this fan 10 is present. downstream this Diagonallaufrades 40 is a guide 42 and then the same still a diffuser 44 following the Diagonallaufrad 40 formed within the tubular fan 10.
  • the support plate 50 curves end in the axial direction, so that they streamlined the axially aligned intermediate sheath 52nd abuts.
  • the flow medium thus flows radially outward on the Carrier disk 50 and past the intermediate casing 52.
  • the diagonal impeller 40 has circumferentially distributed blades 54, with its one side on the support plate 50 and with their opposite other side on a cover plate 56th are attached.
  • the blades 54 are in the present case Profiled cross-sectionally and also wound. That's theirs upstream inlet edge 55, which is approximately perpendicular to Direction of flow (arrow 58) of the flowing flow medium aligned, provided with a fillet.
  • the downstream side Exit edge 60 which is also approximately vertical to the downstream leaving diagonal flow (arrow 62) aligned, has the shape of a tip.
  • the cross section the individual blades 54 is in the area between the Carrier plate 50 and the cover plate 56 is not constant, but different sized.
  • each blade 54 increases from the region of the cover disk 56 to the region of the support disk 50 from, so that the blade 54 in the region of the support plate 50 on least and in the region of the cover plate 56 most curved is.
  • the curvature decrease could, for example, but also be in opposite directions, with the strongest curvature in the area the support disc. This depends on the different flow conditions along the blades 54 between their respective ones Connection area on the cover plate 56 and on the support plate 50 off.
  • the leading edge 55 and the trailing edge 60 can be present instead of just arched.
  • the curvature of all blades 54 of the diagonal impeller 40 can a so-called forward curvature or reverse curvature exhibit. Which curvature is chosen depends on whether downstream of the impeller the speed energy available there still to be implemented in print or not. With forward curved blades is compared to backward curved blades a stronger deflection of the Flow medium in the area of the blades reached, causing too a larger energy conversion leads to the requirement that the speed energy still downstream, for example is reacted by means of the diffuser 44 in pressure.
  • the cover plate 56 runs upstream with a radially aligned End wall 61, which in the present case very narrow. So runs the radially inward bulging initial area 56.1 of the cover plate 56 to the end wall 61 is relatively pointed out.
  • the downstream end portion 56.2 of the cover plate 56 has a much stronger downstream tip than the starting area 56.1.
  • a angled annular gap 68 present in the present case, the can not be avoided in principle due to the stationary Housing wall 12 and the rotating Diagonallaufrades 40.
  • a sealing element 70 which at a distance in an angle in the cover plate 56 molded annular groove 72 engages.
  • This angled annular gap 68 represents a flow labyrinth and prevents or complicates that the blades 54 downstream leaving gas flow back through the annular gap 68th again flows into the gap 74, between the cover plate 56 and the housing shell 12 is present. The stronger such a return flow is formed, the lower it becomes the efficiency of the tube fan 10th
  • the flow leaving the diagonal impeller 40 then flows through the area of the guide 42.
  • this pipe section of the tube fan 10 are between the intermediate jacket 52 and the housing wall vanes 80 are arranged.
  • these vanes 80 are in their outer area 80.1, which faces the housing shell 12, more curved than in its inner region 80.2, the intermediate coat 52 faces.
  • the helical, Diagonal direction leaving the diagonal impeller 40 Gas flow in an axial flow direction (arrow 84) deflected.
  • the vanes 80 are wound three-dimensional and profiled trained.
  • the outside of the wall section 52.1 of the intermediate jacket 52nd is formed in the region of the guide vanes 80 planar. It is also possible, the distance between the intermediate sheath 52 and the housing shell 12 in the flow direction itself let enlarge by the intermediate jacket 52 downstream has a decreasing diameter.
  • a transverse wall 86 at which the Diagonal impeller 40 driving motor 88 is attached.
  • this diffuser 44 is by a downstream increasing flow ring channel between the housing shell 12 and the intermediate jacket 52 constructive realized. So the intermediate jacket 52 is in the area of the diffuser 44 at an angle 90, greater than zero degrees and is less than 30 degrees, inclined to the axial direction 22.1. in the Area of the diffuser 44, this wall section 52.2 is also just like the wall section 52.1 in the area the guide 42 is. However, it is possible the two wall sections 52.1 and 52.2 not with a kink 91, but with a uniform one Curvature to provide cross-sectional jumps in the wall construction the components limiting the flow medium avoid. Also, the wall portion 52.2 in the axial direction be bent, so that the flow ring channel is in the flow direction widened in cross section.
  • FIG. 2 tube fan 10.2 different in principle by the tube fan 10 in particular by that its housing jacket 12 of an insulating sleeve 92nd representing insulating material 94 is surrounded.
  • This insulation sleeve 92 is each of an end-side Z-shaped pipe frame 96 ring-shaped edged.
  • This frame 96 surrounds with a Beading 98 the end edge of the housing shell 12.
  • the annular Shape of the housing shell 12 and thus the tube fan 10.2 - makes the attachment of an outer insulation constructive very easy. So are no bulged wall areas of the tube fan present, as is the case in the prior art is that relatively costly dress up with material outside to let.
  • the sleeve defined by the intermediate jacket 52 is sound-permeable designed and thus acts sound-absorbing.
  • the intermediate sheath is at least in Wall section 52.2 formed as a perforated plate.

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

Abstract

A pipe ventilator unit regulates the passage of air or other gas through a pipe. The ventilator has a motor mounted within the pipe from which it is separated by a teardop housing. The motor drives a ventilator fan which has a central disc with radially arranged blades. The resulting air flow is guided by a series of vanes (42).

Description

TECHNISCHES GEBIETTECHNICAL AREA

Die Erfindung betrifft einen Ventilator mit rotationssymmetrischem Gehäuse zum Fördern von Luft oder anderen Gasen. Derartige Ventilatoren werden insbesondere am Anfang, innerhalb oder am Ende von Rohrleitungen eingesetzt. Sie werden daher häufig Rohrventilatoren genannt. Das Einsatzgebiet des erfindungsgemäßen Rohrventilators beschränkt sich allerdings nicht nur auf die Verwendung in Rohrleitungssystemen.The invention relates to a fan with rotationally symmetrical Housing for conveying air or other gases. Such fans are especially at the beginning, within or used at the end of pipelines. They will therefore often called tube fans. The operational area of the However, pipe fan according to the invention is limited not just for use in piping systems.

STAND DER TECHNIKSTATE OF THE ART

Es sind eine Reihe unterschiedlicher Konstruktionen von Rohrventilatoren bekannt. Bei einer ersten Art von Rohrventilatoren ist ein rückwärts gekrümmtes Radiallaufrad in einem zwiebelförmigen Gehäuse untergebracht. Eine zweite Art von Rohrventilatoren besitzt ebenfalls ein zwiebelförmiges Gehäuse. An das aus einer Deckscheibe, einer Tragscheibe und einer Anzahl zweidimensional gekrümmter, nicht profilierter Schaufeln bestehende Diagonallaufrad schließt sich ein radial ausgerichteter Leitapparat an. Ein Diagonallaufrad, bestehend aus einer Tragscheibe und einer Anzahl zweidimensional gekrümmter, nicht profilierter Blechschaufeln, und einem sich axial anschließenden Leitapparat besitzt eine dritte Art von Rohrventilatoren.There are a number of different constructions of Tube fans known. In a first kind of Pipe fans is a backward curved radial impeller in accommodated on a bulbous housing. A second kind of tube fans also has an onion-shaped Casing. To that from a cover disk, a support disk and a number of two-dimensionally curved, not profiled Shovels existing diagonal impeller closes radially aligned distributor. A diagonal impeller, consisting from a support disk and a number two-dimensional curved, not profiled sheet metal blades, and one itself axially adjoining diffuser possesses a third type of Duct fans.

DARSTELLUNG DER ERFINDUNGPRESENTATION OF THE INVENTION

Ausgehend von diesem vorbekannten Stand der Technik liegt der Erfindung die Aufgabe zugrunde, einen Rohrventilator mit einem sehr hohen Wirkungsgrad und einer hohen Leistungsdichte bei insgesamt niedrigem Geräusch bereitzustellen. Based on this known prior art is the Invention, the object of a pipe fan with a very high efficiency and high power density to provide low noise overall.

Die Erfindung ist durch die Merkmale des Hauptanspruches gegeben. Sinnvolle Weiterbildungen der Erfindung sind Gegenstand von sich an den Hauptanspruch anschließenden weiteren Ansprüchen.The invention is given by the features of the main claim. Meaningful developments of the invention are the subject by itself to the main claim subsequent claims.

Der erfindungsgemäße Rohrventilator zeichnet sich dadurch aus, dass dem Diagonalventilator, bestehend aus Deckscheibe, Tragscheibe und einer Anzahl von an diesen beiden Scheiben befestigter Schaufeln in axialer Richtung ein Leitapparat nachgeschaltet ist. Eine Reihe von darauf aufbauender Optimierungen sind Gegenstand von sich an den Hauptanspruch anschließenden weiteren Ansprüchen. Die Laufradschaufeln und die Leitschaufeln des erfindungsgemäßen Rohrventilators können dreidimensional gekrümmt und profiliert sein, um den unterschiedlichen Anströmwinkeln entlang der Eintrittskanten der Schaufeln jeweils Rechnung tragen zu können.The tubular fan according to the invention is characterized that the diagonal fan, consisting of cover disk, Support disc and a number of these two discs attached blades in the axial direction of a nozzle is downstream. A series of building on it Optimizations are subject of themselves to the main claim subsequent further claims. The impeller blades and the guide vanes of the pipe fan according to the invention can be curved in three dimensions and be profiled to the different angles of incidence along the leading edges to be able to account for the blades.

Die Profilierung ist eine im Wesentlichen stetige Zunahme des Schaufelquerschnittes bis zu einem Maximum und eine daran anschließende im Wesentlichen stetige Abnahme des Schaufelquerschnittes.The profiling is a substantially steady increase in the Blade cross section up to a maximum and one on it subsequent substantially continuous decrease of the blade cross-section.

Der erfindungsgemäße Rohrventilator braucht insbesondere dann keine Einströmdüse zu besitzen, wenn die Laufrad-Deckscheibe sich düsenförmig erweitert. Die Abdichtung zwischen Saug- und Druckraum kann am Laufradaustritt erfolgen. Zur weiteren Steigerung der Druckumsetzung von dynamischem in statischen Druck kann dem Leitapparat ein Diffusor nachgeschaltet werden. Das Gehäuse des Rohrventilators kann idealerweise aus einem einteiligen zylindrischen Rohr hergestellt sein.The pipe ventilator according to the invention needs in particular then to have no inlet nozzle when the impeller cover disc expanded nozzle-shaped. The seal between suction and Pressure chamber can take place at the impeller outlet. To further Increasing the pressure conversion from dynamic to static Pressure can be connected downstream of the diffuser a diffuser. The housing of the tube fan can ideally consist of a be made of one-piece cylindrical tube.

Weitere Vorteile und Merkmale der Erfindung sind den in den Ansprüchen ferner angegebenen Merkmalen sowie den nachstehenden Ausführungsbeispielen zu entnehmen. Further advantages and features of the invention are those in the claims further specified features and the following Refer to exemplary embodiments.

KURZE BESCHREIBUNG DER ZEICHNUNGBRIEF DESCRIPTION OF THE DRAWING

Die Erfindung wird im Folgenden anhand der in der Zeichnung dargestellten Ausführungsbeispiele näher beschrieben und erläutert. Es zeigen:

Fig. 1
eine halbe Schnittdarstellung eines Rohrventilators nach der Erfindung,
Fig. 2
eine Darstellung ähnlich der von Fig. 1 von einem außen gedämmten Rohrventilator nach der Erfindung.
The invention will be described and explained in more detail below with reference to the embodiments illustrated in the drawings. Show it:
Fig. 1
a half sectional view of a tube fan according to the invention,
Fig. 2
a representation similar to that of Fig. 1 of an externally insulated pipe fan according to the invention.

WEGE ZUM AUSFÜHREN DER ERFINDUNGWAYS FOR CARRYING OUT THE INVENTION

Der Rohrventilator 10 besitzt einen äußeren Gehäusemantel 12, der einen kreiszylindrischen, geraden Zylinderinnenraum umschließt. An seiner linken und rechten jeweils endseitigen Stirnwand 14, 16 sind außen an dem Gehäusemantel 12 jeweils ein linker und rechter Flansch 18, 20 fest angebracht, die den Gehäusemantel 12 in axialer Richtung (Achse 22) überragen. Mittels dieser Flansche 18, 20 kann an beiden Enden des Gehäusemantels 12 und damit am Rohrventilator 10 jeweils ein Rohr 24, 26 einer nicht weiter dargestellten Rohrleitung angeschlossen werden. Der Rohrventilator 10 kann also zwischen den Rohren 24, 26 eingebaut werden. Der Außendurchmesser 28 beziehungsweise 30 der Rohre 24 beziehungsweise 26 entspricht damit im vorliegenden Beispielsfall auch dem Außendurchmesser 32 des Gehäusemantels 12. Die Rohre 24, 26 könnten auch jeweils einen vom Durchmesser 32 abweichenden Außendurchmesser besitzen und über einen entsprechenden Rohradapter an den Rohrventilator angeschlossen werden.The tube fan 10 has an outer housing shell 12, which encloses a circular cylindrical, straight cylinder interior. At its left and right end each End wall 14, 16 are outside of the housing shell 12 each one left and right flange 18, 20 firmly attached to the housing shell 12 protrude in the axial direction (axis 22). through these flanges 18, 20 can at both ends of the housing shell 12 and thus at the tube fan 10 each have a tube 24, 26 connected to a pipe not shown become. The tube fan 10 can thus between the tubes 24, 26 are installed. The outer diameter 28 and 30, respectively the tubes 24 and 26 thus corresponds in present example also the outer diameter 32 of the housing shell 12. The tubes 24, 26 could also each one have the outer diameter deviating from the diameter 32 and via a corresponding pipe adapter to the pipe fan be connected.

Der Rohrventilator 10 besitzt ein Diagonallaufrad 40, das eingangsseitig dieses Ventilators 10 vorhanden ist. Abströmseitig dieses Diagonallaufrades 40 ist eine Leiteinrichtung 42 und anschließend derselben noch ein Diffusor 44 im Anschluss an das Diagonallaufrad 40 innerhalb des Rohrventilators 10 ausgebildet.The tube fan 10 has a diagonal impeller 40, the input side this fan 10 is present. downstream this Diagonallaufrades 40 is a guide 42 and then the same still a diffuser 44 following the Diagonallaufrad 40 formed within the tubular fan 10.

Das mittels des Diagonallaufrades 40 durch den Rohrventilator 10 hindurchgedrückte gasförmige Strömungsmedium umströmt einen zentralen Innenraum des Rohrventilators 10, der nach außen abgegrenzt wird durch die Tragscheibe 50 des Rohrventilators 10 und einen sich an die Tragscheibe 50 strömungsgünstig anschließenden Zwischenmantel 52. Die Tragscheibe 50 krümmt sich endseitig in axialer Richtung, so dass sie strömungsgünstig an den in axialer Richtung ausgerichteten Zwischenmantel 52 anstößt. Das Strömungsmedium strömt damit radial außen an der Tragscheibe 50 und an dem Zwischenmantel 52 vorbei.The means of Diagonallaufrades 40 through the pipe fan 10 compressed gaseous flow medium flows around a central interior of the tube fan 10, which is delimited to the outside is through the support plate 50 of the tube fan 10th and one to the support plate 50 aerodynamically adjoining Intermediate jacket 52. The support plate 50 curves end in the axial direction, so that they streamlined the axially aligned intermediate sheath 52nd abuts. The flow medium thus flows radially outward on the Carrier disk 50 and past the intermediate casing 52.

Das Diagonallaufrad 40 besitzt umfangsmäßig verteilte Schaufeln 54, die mit ihrer einen Seite an der Tragscheibe 50 und mit ihrer gegenüberliegenden anderen Seite an einer Deckscheibe 56 befestigt sind. Die Schaufeln 54 sind im vorliegenden Fall querschnittsmäßig profiliert und außerdem verwunden. So ist ihre anströmseitige Eintrittskante 55, die in etwa senkrecht zur Strömungsrichtung (Pfeil 58) des sie anströmenden Strömungsmediums ausgerichtet ist, mit einer Ausrundung versehen. Die abströmseitige Austrittskante 60, die ebenfalls etwa senkrecht zur sie abströmseitig verlassenden Diagonalströmung (Pfeil 62) ausgerichtet ist, besitzt die Form einer Spitze. Der Querschnitt der einzelnen Schaufeln 54 ist im Bereich zwischen der Tragscheibe 50 und der Deckscheibe 56 nicht konstant, sondern unterschiedlich groß. Auch nimmt die Krümmung jeder Schaufel 54 vom Bereich der Deckscheibe 56 zum Bereich der Tragscheibe 50 ab, so dass die Schaufel 54 im Bereich der Tragscheibe 50 am wenigsten und im Bereich der Deckscheibe 56 am stärksten gekrümmt ist. Die Krümmungsabnahme könnte beispielsweise aber auch gegenläufig sein, mit der stärksten Krümmung im Bereich der Tragscheibe. Dies hängt von den unterschiedlichen Strömungsverhältnissen längs der Schaufeln 54 zwischen ihrem jeweiligen Anschlussbereich an der Deckscheibe 56 und an der Tragscheibe 50 ab. Die Eintrittskante 55 und die Austrittskante 60 können statt gerade auch gewölbt vorhanden sein.The diagonal impeller 40 has circumferentially distributed blades 54, with its one side on the support plate 50 and with their opposite other side on a cover plate 56th are attached. The blades 54 are in the present case Profiled cross-sectionally and also wound. That's theirs upstream inlet edge 55, which is approximately perpendicular to Direction of flow (arrow 58) of the flowing flow medium aligned, provided with a fillet. The downstream side Exit edge 60, which is also approximately vertical to the downstream leaving diagonal flow (arrow 62) aligned, has the shape of a tip. The cross section the individual blades 54 is in the area between the Carrier plate 50 and the cover plate 56 is not constant, but different sized. Also, the curvature of each blade 54 increases from the region of the cover disk 56 to the region of the support disk 50 from, so that the blade 54 in the region of the support plate 50 on least and in the region of the cover plate 56 most curved is. The curvature decrease could, for example, but also be in opposite directions, with the strongest curvature in the area the support disc. This depends on the different flow conditions along the blades 54 between their respective ones Connection area on the cover plate 56 and on the support plate 50 off. The leading edge 55 and the trailing edge 60 can be present instead of just arched.

Die Krümmung aller Schaufeln 54 des Diagonallaufrades 40 können eine sogenannte Vorwärtskrümmung oder Rückwärtskrümmung aufweisen. Welche Krümmung gewählt wird, hängt davon ab, ob abströmseitig des Laufrades die dort vorhandene Geschwindigkeitsenergie noch in Druck umgesetzt werden soll oder nicht. Mit vorwärts gekrümmten Schaufeln wird im Vergleich zu rückwärts gekrümmten Schaufeln eine stärkere Umlenkung des Strömungsmediums im Bereich der Schaufeln erreicht, was zu einer größeren Energieumsetzung führt mit dem Erfordernis, dass die Geschwindigkeitsenergie noch abströmseitig beispielsweise mittels des Diffusors 44 in Druck umgesetzt wird.The curvature of all blades 54 of the diagonal impeller 40 can a so-called forward curvature or reverse curvature exhibit. Which curvature is chosen depends on whether downstream of the impeller the speed energy available there still to be implemented in print or not. With forward curved blades is compared to backward curved blades a stronger deflection of the Flow medium in the area of the blades reached, causing too a larger energy conversion leads to the requirement that the speed energy still downstream, for example is reacted by means of the diffuser 44 in pressure.

Die Deckscheibe 56 läuft anströmseitig mit einer radial ausgerichteten Stirnwand 61 aus, die im vorliegenden Fall sehr schmal ist. So läuft der nach radial innen ausgewölbte Anfangsbereich 56.1 der Deckscheibe 56 zur Stirnwand 61 relativ spitz aus.The cover plate 56 runs upstream with a radially aligned End wall 61, which in the present case very narrow. So runs the radially inward bulging initial area 56.1 of the cover plate 56 to the end wall 61 is relatively pointed out.

Der abströmseitige Endbereich 56.2 der Deckscheibe 56 besitzt eine wesentlich stärkere abströmseitige Spitze, als sie der Anfangsbereich 56.1 aufweist.The downstream end portion 56.2 of the cover plate 56 has a much stronger downstream tip than the starting area 56.1.

Zwischen dem Endbereich 56.2 und dem Gehäusemantel 12 ist ein im vorliegenden Fall abgewinkelter Ringspalt 68 vorhanden, der sich prinzipiell nicht vermeiden lässt infolge der stationären Gehäusewand 12 und des rotierenden Diagonallaufrades 40. In diesem abgewinkelten Ringspalt 68 liegt ein Dichtungselement 70, das mit Abstand in eine in der Deckscheibe 56 winkelförmig eingeformten Ringnut 72 eingreift. Dieser abgewinkelte Ringspalt 68 stellt ein Strömungslabyrinth dar und verhindert beziehungsweise erschwert, dass die die Schaufeln 54 abströmseitig verlassende Gasströmung rückwärts durch den Ringspalt 68 wieder in den Zwischenraum 74 einströmt, der zwischen der Deckscheibe 56 und dem Gehäusemantel 12 vorhanden ist. Je stärker eine solche Rückströmung sich ausgebildet, umso niedriger wird der Wirkungsgrad des Rohrventilators 10.Between the end portion 56.2 and the housing shell 12 is a angled annular gap 68 present in the present case, the can not be avoided in principle due to the stationary Housing wall 12 and the rotating Diagonallaufrades 40. In this angled annular gap 68 is a sealing element 70, which at a distance in an angle in the cover plate 56 molded annular groove 72 engages. This angled annular gap 68 represents a flow labyrinth and prevents or complicates that the blades 54 downstream leaving gas flow back through the annular gap 68th again flows into the gap 74, between the cover plate 56 and the housing shell 12 is present. The stronger such a return flow is formed, the lower it becomes the efficiency of the tube fan 10th

Die das Diagonallaufrad 40 verlassende Strömung durchströmt anschließend den Bereich der Leiteinrichtung 42. In diesem Rohrabschnitt des Rohrventilators 10 sind zwischen dem Zwischenmantel 52 und der Gehäusewand Leitschaufeln 80 angeordnet. Im vorliegenden Fall sind diese Leitschaufeln 80 in ihrem äußeren Bereich 80.1, der dem Gehäusemantel 12 zugewandt ist, stärker gekrümmt als in ihrem inneren Bereich 80.2, der dem Zwischenmantel 52 zugewandt ist. Auf diese Weise wird die in schraubenförmiger, diagonaler Richtung das Diagonallaufrad 40 verlassende Gasströmung in eine axiale Strömungsrichtung (Pfeil 84) umgelenkt.The flow leaving the diagonal impeller 40 then flows through the area of the guide 42. In this pipe section of the tube fan 10 are between the intermediate jacket 52 and the housing wall vanes 80 are arranged. In the present Case, these vanes 80 are in their outer area 80.1, which faces the housing shell 12, more curved than in its inner region 80.2, the intermediate coat 52 faces. In this way, the helical, Diagonal direction leaving the diagonal impeller 40 Gas flow in an axial flow direction (arrow 84) deflected.

Auch die Leitschaufeln 80 sind dreidimensional verwunden und profiliert ausgebildet.The vanes 80 are wound three-dimensional and profiled trained.

Die Außenseite des Wandabschnittes 52.1 des Zwischenmantels 52 ist im Bereich der Leitschaufeln 80 ebenflächig ausgebildet. Es ist allerdings auch möglich, den Abstand zwischen dem Zwischenmantel 52 und dem Gehäusemantel 12 in Strömungsrichtung sich vergrößern zu lassen, indem der Zwischenmantel 52 abströmseitig einen sich verkleinernden Durchmesser besitzt.The outside of the wall section 52.1 of the intermediate jacket 52nd is formed in the region of the guide vanes 80 planar. It However, it is also possible, the distance between the intermediate sheath 52 and the housing shell 12 in the flow direction itself let enlarge by the intermediate jacket 52 downstream has a decreasing diameter.

Im vorliegenden Fall ist an dem Zwischenmantel 52, im Bereich der Schaufeln 80, eine Querwand 86 befestigt, an der der das Diagonallaufrad 40 antreibende Motor 88 befestigt ist.In the present case is on the intermediate casing 52, in the area attached to the blades 80, a transverse wall 86, at which the Diagonal impeller 40 driving motor 88 is attached.

Im Anschluss an die Leiteinrichtung 42 ist abströmseitig derselben der Diffusor 44 ausgebildet. Dieser Diffusor 44 wird durch einen sich abströmseitig vergrößernden Strömungsringkanal zwischen dem Gehäusemantel 12 und dem Zwischenmantel 52 konstruktiv verwirklicht. So ist der Zwischenmantel 52 im Bereich des Diffusors 44 mit einem Winkel 90, der größer Null Grad und kleiner 30 Grad ist, gegen die axiale Richtung 22.1 geneigt. Im Bereich des Diffusors 44 ist dieser Wandabschnitt 52.2 ebenfalls ebenflächig so wie es auch der Wandabschnitt 52.1 im Bereich der Leiteinrichtung 42 ist. Allerdings ist es möglich, die beiden Wandabschnitte 52.1 und 52.2 nicht mit einem Knick 91 aneinanderstoßen zu lassen, sondern mit einer gleichmäßigen Krümmung zu versehen, um Querschnittssprünge in der Wandungskonstruktion der das Strömungsmedium begrenzenden Bauteile zu vermeiden. Auch kann der Wandabschnitt 52.2 in axialer Richtung gebogen sein, so dass der Strömungsringkanal sich in Strömungsrichtung querschnittsmäßig verstärkt aufweitet.Following the guide 42 is the same downstream the diffuser 44 is formed. This diffuser 44 is by a downstream increasing flow ring channel between the housing shell 12 and the intermediate jacket 52 constructive realized. So the intermediate jacket 52 is in the area of the diffuser 44 at an angle 90, greater than zero degrees and is less than 30 degrees, inclined to the axial direction 22.1. in the Area of the diffuser 44, this wall section 52.2 is also just like the wall section 52.1 in the area the guide 42 is. However, it is possible the two wall sections 52.1 and 52.2 not with a kink 91, but with a uniform one Curvature to provide cross-sectional jumps in the wall construction the components limiting the flow medium avoid. Also, the wall portion 52.2 in the axial direction be bent, so that the flow ring channel is in the flow direction widened in cross section.

Der in Fig. 2 dargestellte Rohrventilator 10.2 unterscheidet sich vom Rohrventilator 10 prinzipiell insbesondere dadurch, dass sein Gehäusemantel 12 von einem eine Isolierungshülse 92 darstellenden Dämmmaterial 94 umgeben ist. Diese Isolierungshülse 92 wird von jeweils einer endseitigen Z-förmigen Rohrzarge 96 ringförmig eingefasst. Diese Zarge 96 umgreift mit einer Umbördelung 98 den Stirnrand des Gehäusemantels 12. Die kreisringförmige Form des Gehäusemantels 12 und damit des Rohrventilators 10.2 - Vergleichbares gilt auch für den Rohrventilator 10 - macht die Anbringung einer äußeren Isolierung konstruktiv sehr einfach. So sind keine ausgewölbten Wandbereiche des Rohrventilators vorhanden, so wie es im Stand der Technik der Fall ist, die sich nur relativ aufwändig mit Material außen verkleiden lassen.The illustrated in Fig. 2 tube fan 10.2 different in principle by the tube fan 10 in particular by that its housing jacket 12 of an insulating sleeve 92nd representing insulating material 94 is surrounded. This insulation sleeve 92 is each of an end-side Z-shaped pipe frame 96 ring-shaped edged. This frame 96 surrounds with a Beading 98 the end edge of the housing shell 12. The annular Shape of the housing shell 12 and thus the tube fan 10.2 - The same applies to the tube fan 10 - makes the attachment of an outer insulation constructive very easy. So are no bulged wall areas of the tube fan present, as is the case in the prior art is that relatively costly dress up with material outside to let.

Die durch den Zwischenmantel 52 definierte Hülse ist schalldurchlässig ausgebildet und wirkt dadurch schalldämpfend. Im vorliegenden Fall ist der Zwischenmantel zumindest im Wandabschnitt 52.2 als Lochblech ausgebildet.The sleeve defined by the intermediate jacket 52 is sound-permeable designed and thus acts sound-absorbing. In the present case, the intermediate sheath is at least in Wall section 52.2 formed as a perforated plate.

Claims (17)

Rohrventilator (10, 10.2) für gasförmige Medien, mit einem mehrere Schaufeln (54) aufweisenden Diagonallaufrad (40) und mit einer sich abströmseitig an das Diagonallaufrad (40) anschließenden Leiteinrichtung (42) zur Druckerhöhung des Mediums, dadurch gekennzeichnet, dass die Schaufeln (54) des Diagonallaufrades (40) an einer Tragscheibe (50) und an einer Deckscheibe (56) befestigt sind, und sich die Leiteinrichtung (42) in axialer Richtung (22.1) an das Diagonallaufrad (40) anschließt. Tube fan (10, 10.2) for gaseous media, with a plurality of blades (54) having diagonal impeller (40) and with a downstream of the diagonal impeller (40) subsequent guide (42) for increasing the pressure of the medium, characterized in that the vanes (54) of the diagonal impeller (40) are secured to a support disc (50) and to a cover disc (56), and the guide device (42) adjoins the diagonal impeller (40) in the axial direction (22.1). Rohrventilator nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, dass sich der Leiteinrichtung (42) ein abströmseitig allmählich sich vergrößernder Strömungskanal anschließt. Pipe fan according to one of the preceding claims,
characterized in that the guide (42) adjoins a flow channel which gradually increases in size on the outflow side. Rohrventilator nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, dass sein hohlzylindrisches Gehäuse einen Gehäusemantel (12) besitzt, der längs seiner Zylinderachse (22) konstante Querschnittsmaße aufweist. Pipe fan according to one of the preceding claims,
characterized in that its hollow-cylindrical housing has a housing jacket (12) which has constant cross-sectional dimensions along its cylinder axis (22). Rohrventilator nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, dass die Schaufeln (54) des Laufrades (40) profiliert sind. Pipe fan according to one of the preceding claims,
characterized in that the blades (54) of the impeller (40) are profiled. Rohrventilator nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, dass die Schaufeln (54) der Leiteinrichtung (42) profiliert sind. Pipe fan according to one of the preceding claims,
characterized in that the vanes (54) of the guide (42) are profiled. Rohrventilator nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, dass die Schaufeln (54) des Laufrades (40) dreidimensional verwunden sind. Pipe fan according to one of the preceding claims,
characterized in that the blades (54) of the impeller (40) are wound three-dimensionally. Rohrventilator nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, dass die Schaufeln (54) der Leiteinrichtung (42) dreidimensional verwunden sind. Pipe fan according to one of the preceding claims,
characterized in that the blades (54) of the guide (42) are wound three-dimensionally. Rohrventilator nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, dass zwischen der Deckscheibe (56) des Laufrades (40) und einem das Laufrad (40) enthaltenden Gehäuse (12) ein Ringspalt (68) vorhanden ist. Pipe fan according to one of the preceding claims,
characterized in that between the cover plate (56) of the impeller (40) and an impeller (40) containing housing (12) has an annular gap (68) is present. Rohrventilator nach Anspruch 8,
dadurch gekennzeichnet, dass der Ringspalt (68) labyrinthartig ausgebildet ist. Pipe fan according to claim 8,
characterized in that the annular gap (68) is formed like a labyrinth. Rohrventilator nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, dass das abströmseitige Ende (56.2) der Deckscheibe (56) des Laufrades (40) in etwa in axialer Richtung (22.1) ausgerichtet ist, so dass die Deckscheibe (56) eine allmähliche Krümmung in Richtung Leiteinrichtung (42) aufweist. Pipe fan according to one of the preceding claims,
characterized in that the downstream end (56.2) of the cover disc (56) of the impeller (40) is aligned approximately in the axial direction (22.1), so that the cover disc (56) has a gradual curvature in the direction of guide (42). Rohrventilator nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, dass die Deckscheibe des Laufrades sich entgegen der Strömungsrichtung düsenartig aufweitet. Pipe fan according to one of the preceding claims,
characterized in that the cover disc of the impeller expands counter to the direction of flow nozzle-like. Rohrventilator nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, dass das abströmseitige Ende der Tragscheibe (50) des Laufrades (40) in etwa in axialer Richtung (22.1) ausgerichtet ist, so dass die Tragscheibe (50) am Laufradaustritt eine allmähliche Krümmung in Richtung Leiteinrichtung (42) aufweist. Pipe fan according to one of the preceding claims,
characterized in that the downstream end of the support disc (50) of the impeller (40) is aligned approximately in the axial direction (22.1), so that the support disc (50) at the impeller outlet has a gradual curvature in the direction of guide (42). Rohrventilator nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, dass der Gehäusemantel (12) von einem schallabsorbierenden Material (94) umgeben ist, der Gehäusemantel (12) schalldurchlässig ist. Pipe fan according to one of the preceding claims,
characterized in that the housing jacket (12) is surrounded by a sound-absorbing material (94), the housing shell (12) is sound permeable. Rohrventilator nach Anspruch 13,
dadurch gekennzeichnet, dass das schallabsorbierende Material (94) von einem weiteren Gehäusemantel (92) umgeben ist. Pipe fan according to claim 13,
characterized in that the sound-absorbing material (94) is surrounded by a further housing jacket (92). Rohrventilator nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, dass die Leiteinrichtung (42) aus Kunststoff oder Aluminium besteht. Pipe fan according to one of the preceding claims,
characterized in that the guide (42) made of plastic or aluminum. Rohrventilator nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, dass die Laufradschaufeln (54) aus Kunststoff oder Aluminium bestehen. Pipe fan according to one of the preceding claims,
characterized in that the impeller blades (54) made of plastic or aluminum. Rohrventilator nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, dass die Leiteinrichtung (42) mit dem sich anschließenden, sich vergrößernden Strömungskanal (Diffusor 44) und mit der Aufhängung für den motorischen Antrieb (88) aus einem Teil gefertigt ist. Pipe fan according to one of the preceding claims,
characterized in that the guide (42) with the adjoining, increasing flow channel (diffuser 44) and with the suspension for the motor drive (88) is made of a part.
EP04029400.1A 2003-12-18 2004-12-11 Duct blower Active EP1544472B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20319749U 2003-12-18
DE20319749U DE20319749U1 (en) 2003-12-18 2003-12-18 tubefan

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EP1544472A2 true EP1544472A2 (en) 2005-06-22
EP1544472A3 EP1544472A3 (en) 2006-09-13
EP1544472B1 EP1544472B1 (en) 2014-01-22

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ID=33441949

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Cited By (3)

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EP2236837A2 (en) * 2009-03-31 2010-10-06 Behr GmbH & Co. KG Axial ventilator, in particular for a motor vehicle
DE102013107579A1 (en) 2012-07-17 2014-01-23 Ruck Ventilatoren Gmbh Fan for gaseous media
CN105402165A (en) * 2014-09-09 2016-03-16 苏州金莱克精密机械有限公司 Blower

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DE102010032168A1 (en) 2010-07-23 2012-01-26 Ruck Ventilatoren Gmbh Diagonal fan
DE102010047489A1 (en) 2010-10-06 2012-04-12 Ruck Ventilatoren Gmbh Wall mounted fan has guide device that is provided adjacent to mixed flow impeller for increasing pressure of gaseous medium, and closure flap including drive unit for closing pipe ventilator
DE102012019419A1 (en) 2012-10-04 2014-04-10 Ruck Ventilatoren Gmbh Diagonal ventilator used in e.g. piping system, has suction unit which is provided with filter unit for transferring gaseous medium to diagonal running wheel of blades
DE102016215738A1 (en) 2016-08-23 2018-03-01 Siemens Aktiengesellschaft Impeller, manufacturing process
GB2573813A (en) 2018-05-18 2019-11-20 Dyson Technology Ltd A Compressor
DE102018128792A1 (en) 2018-11-16 2020-05-20 Ebm-Papst Mulfingen Gmbh & Co. Kg Compact diagonal fan with guide device
DE102018128791A1 (en) * 2018-11-16 2020-05-20 Ebm-Papst Mulfingen Gmbh & Co. Kg Diagonal fan with guide device
DE102018128821A1 (en) 2018-11-16 2020-05-20 Ebm-Papst Mulfingen Gmbh & Co. Kg Diagonal fan with optimized diagonal impeller
DE102022131246A1 (en) 2022-11-25 2024-05-29 Ebm-Papst Mulfingen Gmbh & Co. Kg Fan

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Publication number Priority date Publication date Assignee Title
EP2236837A2 (en) * 2009-03-31 2010-10-06 Behr GmbH & Co. KG Axial ventilator, in particular for a motor vehicle
EP2236837A3 (en) * 2009-03-31 2014-10-01 Behr GmbH & Co. KG Axial ventilator, in particular for a motor vehicle
DE102013107579A1 (en) 2012-07-17 2014-01-23 Ruck Ventilatoren Gmbh Fan for gaseous media
DE102013107579B4 (en) * 2012-07-17 2017-10-26 Ruck Ventilatoren Gmbh Fan for gaseous media
CN105402165A (en) * 2014-09-09 2016-03-16 苏州金莱克精密机械有限公司 Blower

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EP1544472B1 (en) 2014-01-22
DE20319749U1 (en) 2004-11-04

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