EP1895166B1 - Flow director for a fan - Google Patents

Flow director for a fan Download PDF

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Publication number
EP1895166B1
EP1895166B1 EP06018108A EP06018108A EP1895166B1 EP 1895166 B1 EP1895166 B1 EP 1895166B1 EP 06018108 A EP06018108 A EP 06018108A EP 06018108 A EP06018108 A EP 06018108A EP 1895166 B1 EP1895166 B1 EP 1895166B1
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EP
European Patent Office
Prior art keywords
nozzle ring
ring
flow straightener
fan
air guide
Prior art date
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EP06018108A
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German (de)
French (fr)
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EP1895166A1 (en
Inventor
Ralf Meier
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Individual
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Individual
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Priority to AT06018108T priority Critical patent/ATE422619T1/en
Priority to EP06018108A priority patent/EP1895166B1/en
Priority to DE502006002832T priority patent/DE502006002832D1/en
Publication of EP1895166A1 publication Critical patent/EP1895166A1/en
Application granted granted Critical
Publication of EP1895166B1 publication Critical patent/EP1895166B1/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/40Casings; Connections of working fluid
    • F04D29/52Casings; Connections of working fluid for axial pumps
    • F04D29/522Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
    • F04D29/526Details of the casing section radially opposing blade tips
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/40Casings; Connections of working fluid
    • F04D29/52Casings; Connections of working fluid for axial pumps
    • F04D29/54Fluid-guiding means, e.g. diffusers
    • F04D29/541Specially adapted for elastic fluid pumps
    • F04D29/542Bladed diffusers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/70Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F04D29/703Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards

Definitions

  • the invention relates to a flow straightener for a fan, in particular an air cooler, consisting of a conically narrowing in the interior nozzle ring, a concentrically arranged and connected to the nozzle ring retaining sleeve for a fan motor and a protective grid for contact protection.
  • a fan mounting construction consisting of a simultaneously forming a contact protection wire grid of concentrically extending rings, which are interconnected by radially extending struts.
  • the outer ends of the struts are angled in the axial direction and form feet, by means of which the wire mesh can be mounted on a retaining pad, for example via a housing opening.
  • a ring is locked, which carries substantially radially inwardly extending air guide vanes, which terminate in a housing of substantially square cross-section, which is intended to receive a fan motor, which is screwed to the contact guard.
  • the guide vane assembly is replaceable in order to adapt the overall arrangement to desired throw lengths of the fan can.
  • the vane arrangement therefore has no supporting function.
  • EP 0 547 253 B1 describes a flow straightener for a fan, comprising an outer retaining ring and a grid surrounded by this with a central mounting opening for an electric motor, the webs having a extending approximately perpendicular to the plane defined by the grid plane extending depth, the grid a plurality comprises concentrically in the radial distance from one another extending annular webs and a plurality of circumferentially distributed radially arranged webs connecting the ring lands with each other and with an inner, the mounting hole surrounding retaining ring and with the outer retaining ring.
  • the annular webs have a small depth compared to the depth of the fan wheel, it is in the range of 1 to 2 cm, which makes it necessary to keep the distance between the rings so small that you can not reach through the protective grille with your fingers ,
  • a comparable flow straightener is off DE 90 13 191 U1 known in which the Having the electric motor of the fan bearing guards rectangular honeycomb walls with so close a distance that you can not reach through the honeycombs with your fingers.
  • the said one-piece constructions have the disadvantage that due to the small, relatively narrow grid honeycomb the air friction losses are relatively large, which deteriorates the overall fan efficiency. In addition, the rectifying effect is relatively limited.
  • a drive motor assembly for air cooler fans which is provided with a flow guide downstream of the impeller located in a fan suction nozzle.
  • the flow director has a vane ring having an inner ring body supporting the vanes and the drive motor. Between the vane ring and the impeller is a wire mesh grid as protection against contact.
  • the Strömungsleitapparat has a circumferential housing ring, which is connected to the suction nozzle, for example screwed.
  • the invention has for its object to provide a flow straightener of the type mentioned, which can be inexpensively manufactured and widely used universally and has a high rectifying effect at low losses.
  • the unit consisting of the nozzle ring, the retaining sleeve and the air guide vanes arranged therebetween, assumes the entire supporting function for the electric motor.
  • This unit is designed as an integral molded part, in particular made of plastic.
  • the nozzle ring at the same time forms the receiving space for the impeller of the fan and protects it in the radial direction.
  • a protective grid is provided, which ensures a protection against contact in the axial direction.
  • the air guide vanes have an axial extent in the range of 4 to 8 cm, which is preferred, such a large distance is formed between the outside of the protective grille and the impeller blades, that the Distance between the individual bars or struts of the protective grid compared to the usual extent may be increased considerably. As a result, the flow resistance of the protective grid is kept small.
  • the said grid in the flow straightener according to the invention has only contact protection function, the holding function for the actual fan takes over, as already mentioned, the integral unit of the nozzle ring, air guide vanes and retaining sleeve, but contributes to the protection against the grid stability, since it is integral with the remaining components of the flow straightener is connected.
  • the contact protection grid consists of concentric rings, which are interconnected by radially extending struts. It is injected in one piece with the other components of the construction.
  • the air guide vanes take over the function of the radial struts of the contact protection grid, since the rings thereof are integrally connected to the downstream edges of the air guide vanes.
  • the nozzle ring preferably has a taper of about 2 °. It opens in the direction away from the contact protection grid, which facilitates demolding during manufacture or even makes it possible in the first place. This conicity ensures at the same time a water drain to the outside with horizontal mounting of the fan shaft.
  • the nozzle ring has a circumferential flange, which allows its mounting on housing walls, which are not provided with nozzle inlet nozzle. These housings can therefore be made of non-deep drawing sheet metal, which makes their production cheaper.
  • the flange has a plurality of circumferentially distributed, radially outwardly standing mounting tabs with holes for receiving screws or studs. With the help of these mounting tabs of the nozzle ring over an opening, such as a housing opening, can be mounted.
  • a particularly advantageous supplement of the nozzle ring which facilitates its installation behind an opening formed in a plate-shaped component, for example in a housing wall, consists of an additional nozzle ring which consists of a substantially radially extending flange ring and one with this via an inlet curvature integrally connected Einsteckring consists, which has an outer diameter which is smaller than the inner diameter of the nozzle ring on its side facing away from contact.
  • On the flange are formed in alignment with the holes in the nozzle ring studs extending axially parallel in the same direction as the Einsteckring.
  • This additional nozzle ring can thus be inserted into a correspondingly dimensioned housing opening, wherein the stud bolts penetrate holes formed in the housing wall.
  • the fan ring bearing nozzle ring is attached to the additional nozzle ring so that the mounting tabs are penetrated by the studs. With the help of nuts then the nozzle ring is set on the additional nozzle ring. Due to this construction, the housing to which the assembly is to be mounted need not have an inlet nozzle and also stud bolts for fixing the nozzle ring. The additional nozzle ring promotes the inflow of air into the fan.
  • the air vanes which act in the sense of a stator and are arranged downstream of the fan must be sized to match the fan impeller.
  • the person skilled in such dimensioning rules are known. Only by way of example can on the DE 94 22 006 U1 in which the geometry of air vanes is described in detail.
  • the flow straightener in Fig. 1 is shown without contact protection grid to make its air guide blades better recognizable.
  • the flow straightener consists of a nozzle ring 1, which has a slightly conical peripheral wall 1a, at whose one axial end a circumferential flange 1b is formed. Peripheral wall 1a and flange 1b are supported and reinforced by a plurality of struts 1c.
  • a plurality of fixed in the example shown 13 air guide vanes 2, which are integrally connected to the inside of the peripheral wall 1 a.
  • the air guide vanes 2 terminate at their other, inner ends on a retaining sleeve 3, which is intended and dimensioned for receiving and holding an electric motor (not shown).
  • a retaining sleeve 3 which is intended and dimensioned for receiving and holding an electric motor (not shown).
  • Fig. 1 results, take the air guide vanes 2 in the axial direction of the nozzle ring 1 is not the full space of the same, but leave a receiving space free, in which the impeller of the fan (not shown) can rotate.
  • the drive motor for the impeller is thus of the in Fig. 1 visible top inserted forth in the particular of the retaining sleeve opening and attached to the retaining sleeve 3, while the impeller on the other side, here the bottom, attached to the motor shaft and secured thereto.
  • Fig. 2 shows the construction of Fig. 1 mounted on a supporting component 6, for example on a housing wall and provided with a contact protection grid 7.
  • the protective grid 7 consists of a plurality of concentric rings 7a, which are integrally connected to each other in the example shown by radially extending struts 7b.
  • This construction The air vanes 2 take over the function of the radial struts 7b, because the rings 7a are integrally connected to the downstream edges of the air vanes, for example by a common, single injection molding operation.
  • nozzle ring 1 may be formed on this stud, or it may have holes for receiving bolts.
  • the assembly is particularly elegant with the aid of an additional nozzle ring on which studs are formed. This is done on the following FIGS. 3 to 8 Referenced.
  • Fig. 3 shows an additional nozzle ring 8 from its inflow side. In relation to Fig. 2 that would be the bottom of it.
  • the additional nozzle ring 8 has a substantially radially extending flange 8a and an integral with this via an inlet curvature Einsteckring 8b.
  • the dimensions of the Einsteckrings 8b are matched to that of the nozzle ring 1 so that the additional nozzle ring 8 can be inserted into the nozzle ring 1.
  • a plurality of studs 8c are attached to the flange 8a, of which in Fig. 3 one is partially visible and extending in the same direction as the male ring 8b.
  • the position of the stud bolts 8c is adjusted with respect to the position of the bore 5 on the nozzle 1 so that the nozzle ring 1 can be plugged onto the stud bolts 8c.
  • Fig. 4 shows the additional nozzle ring 8 in a ready for assembly state from its downstream side.
  • a supporting component such as a housing wall 6 is shown, which has an opening 6a, which is dimensioned to receive the Einsteckrings 8b.
  • the housing wall 6 has four holes 6b to the position of the studs 8c matching points.
  • Fig. 6 shows the additional nozzle ring 8 mounted on the housing wall 6 state.
  • the Einsteckring 8b is inserted through the housing opening 6a, the studs 8c penetrate the holes provided for them in the housing wall 6, and nuts 8d are screwed onto the stud bolts 8c to the additional nozzle ring on the housing wall 6 to to back up.
  • the in Fig. 7 shown flow rectifier 1 is ready for mounting on the thus prepared housing wall 6.
  • nozzle ring 1 is attached to the Einsteckring 8b (not visible), and its holes are 5 ( Fig. 1 ) penetrated in the mounting tabs 4 of the studs 8c. Finally, a retaining nut 8e is screwed onto the stud bolts 8c.

Abstract

The rectifier has a conically narrowed nozzle ring (1) provided in an inner side of an inflow side to an outflow side. A concentric retaining seal unit (3) for a fan motor is arranged in the ring. A set of air guiding blades (2) extends radially between the ring and the seal unit. The blades are integrally connected with the ring and the seal unit and receive an axial partial area of the ring. A retaining arm for a fan wheel lies upstream of the blades within an area enclosed by the ring. A protective grid (7) lies on the outflow side and connected with the ring.

Description

Die Erfindung bezieht sich auf einen Strömungsgleichrichter für einen Ventilator, insbesondere einen Luftkühler, bestehend aus einem sich im Inneren konisch verengenden Düsenring, einer konzentrisch dazu angeordneten und mit dem Düsenring verbundenen Haltemanschette für einen Ventilatormotor und einem Schutzgitter für den Berührungsschutz.The invention relates to a flow straightener for a fan, in particular an air cooler, consisting of a conically narrowing in the interior nozzle ring, a concentrically arranged and connected to the nozzle ring retaining sleeve for a fan motor and a protective grid for contact protection.

Aus DE 202 08 250 U1 ist eine Ventilatorhalterungskonstruktion bekannt, bestehend aus einem zugleich einen Berührungsschutz bildenden Drahtgitter aus konzentrisch zueinander verlaufenden Ringen, die durch radial verlaufende Streben miteinander verbunden sind. Die äußeren Enden der Streben sind in axialer Richtung abgewinkelt und bilden Füße, mittels derer das Drahtgitter an einer haltenden Unterlage, beispielsweise über einer Gehäuseöffnung, montiert werden kann. Am äußeren Rand des Berührungsschutzgitters ist ein Ring verrastet, der sich im wesentlichen radial nach innen erstreckende Luftleitschaufeln trägt, die an einem Gehäuse im wesentlichen quadratischen Querschnitt enden, das zur Aufnahme eines Ventilatormotors bestimmt ist, der an dem Berührungsschutzgitter angeschraubt ist. Infolge der Rastverbindung ist die Leitschaufelanordnung auswechselbar, um die Gesamtanordnung an gewünschte Wurfweiten des Ventilators anpassen zu können. Die Leitschaufelanordnung hat daher keine tragende Funktion.Out DE 202 08 250 U1 a fan mounting construction is known, consisting of a simultaneously forming a contact protection wire grid of concentrically extending rings, which are interconnected by radially extending struts. The outer ends of the struts are angled in the axial direction and form feet, by means of which the wire mesh can be mounted on a retaining pad, for example via a housing opening. At the outer edge of the contact protection grid, a ring is locked, which carries substantially radially inwardly extending air guide vanes, which terminate in a housing of substantially square cross-section, which is intended to receive a fan motor, which is screwed to the contact guard. As a result of the latching connection, the guide vane assembly is replaceable in order to adapt the overall arrangement to desired throw lengths of the fan can. The vane arrangement therefore has no supporting function.

EP 0 547 253 B1 beschreibt einen Strömungsgleichrichter für einen Ventilator, bestehend aus einem äußeren Haltering und einem von diesem umgebenen Gitter mit zentraler Montageöffnung für einen Elektromotor, das Stege aufweist, die eine sich etwa senkrecht zu der von dem Gitter aufgespannten Ebene erstreckende Tiefe aufweisen, wobei das Gitter eine Vielzahl sich konzentrisch im radialen Abstand zueinander erstreckender Ringstege und mehrere in Umfangsrichtung verteilt angeordnete Radialstege umfasst, die die Ringstege miteinander und mit einem inneren, die Montageöffnung umgebenden Haltering und mit dem äußeren Haltering verbinden. Die Ringstege haben eine im Vergleich zur Bautiefe des Ventilatorrades geringe Tiefe, sie liegt im Bereich von 1 bis 2 cm, was es erforderlich macht, den Abstand zwischen den Ringen so klein zu halten, dass man mit den Fingern nicht durch das Schutzgitter hindurch greifen kann. EP 0 547 253 B1 describes a flow straightener for a fan, comprising an outer retaining ring and a grid surrounded by this with a central mounting opening for an electric motor, the webs having a extending approximately perpendicular to the plane defined by the grid plane extending depth, the grid a plurality comprises concentrically in the radial distance from one another extending annular webs and a plurality of circumferentially distributed radially arranged webs connecting the ring lands with each other and with an inner, the mounting hole surrounding retaining ring and with the outer retaining ring. The annular webs have a small depth compared to the depth of the fan wheel, it is in the range of 1 to 2 cm, which makes it necessary to keep the distance between the rings so small that you can not reach through the protective grille with your fingers ,

Ein vergleichbarer Strömungsgleichrichter ist aus DE 90 13 191 U1 bekannt, bei dem das den Elektromotor des Ventilators tragende Berührungsschutzgitter rechteckige Waben mit Wänden so engen Abstands aufweist, dass man mit den Fingern nicht durch die Waben greifen kann.A comparable flow straightener is off DE 90 13 191 U1 known in which the Having the electric motor of the fan bearing guards rectangular honeycomb walls with so close a distance that you can not reach through the honeycombs with your fingers.

Die genannten einteiligen Konstruktionen haben den Nachteil, dass aufgrund der kleinen, relativ engen Gitterwaben die Luftreibungsverluste relativ groß sind, was den Ventilatorwirkungsgrad insgesamt verschlechtert. Außerdem ist die Gleichrichtwirkung relativ beschränkt.The said one-piece constructions have the disadvantage that due to the small, relatively narrow grid honeycomb the air friction losses are relatively large, which deteriorates the overall fan efficiency. In addition, the rectifying effect is relatively limited.

Aus DE 44 12 193 C1 ist eine Antriebsmotoranordnung für Luftkühlerventilatoren bekannt, die mit einem Strömungsleitapparat stromabwärts des in einer Ansaugdüse des Ventilators befindlichen Laufrades versehen ist. Der Strömungsleitapparat hat einen Leitschaufelkranz, der einen inneren Ringkörper aufweist, der die Leitschaufeln und den Antriebsmotor trägt. Zwischen dem Leitschaufelkranz und dem Laufrad befindet sich ein Maschendrahtgitter als Berührungsschutz. Der Strömungsleitapparat hat einen Umfangsgehäusering, der mit der Ansaugdüse verbunden, beispielsweise verschraubt ist.Out DE 44 12 193 C1 For example, there is known a drive motor assembly for air cooler fans which is provided with a flow guide downstream of the impeller located in a fan suction nozzle. The flow director has a vane ring having an inner ring body supporting the vanes and the drive motor. Between the vane ring and the impeller is a wire mesh grid as protection against contact. The Strömungsleitapparat has a circumferential housing ring, which is connected to the suction nozzle, for example screwed.

Der Erfindung liegt die Aufgabe zu Grunde einen Strömungsgleichrichter der eingangs genannten Art anzugeben, der sich preisgünstig herstellen und weitgehend universell einsetzen lässt und eine hohe Gleichrichtwirkung bei geringen Verlusten aufweist.The invention has for its object to provide a flow straightener of the type mentioned, which can be inexpensively manufactured and widely used universally and has a high rectifying effect at low losses.

Diese Aufgabe wird durch einen Strömungsgleichrichter mit den Merkmalen von Anspruch 1 gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der abhängigen Ansprüche.This object is achieved by a flow straightener having the features of claim 1. Advantageous embodiments of the invention are the subject of the dependent claims.

Bei dem erfindungsgemäßen Strömungsgleichrichter übernimmt die aus dem Düsenring, der Haltemanschette und den dazwischen angeordneten, sich im wesentlichen radial erstreckenden Luftleitschaufeln bestehende Einheit die gesamte Tragfunktion für den Elektromotor. Diese Einheit ist als ein integrales Spritzteil, insbesondere aus Kunststoff, ausgebildet. Der Düsenring bildet dabei zugleich den Aufnahmeraum für das Laufrad des Ventilators und schützt dieses in radialer Richtung. Auf der dem Aufnahmeraum für das Laufrad abgewandten Seite der Luftleitschaufeln ist ein Schutzgitter vorgesehen, das einen Berührungsschutz in axialer Richtung gewährleistet. Wenn die Luftleitschaufeln eine axiale Erstreckung im Bereich von 4 bis 8 cm haben, was bevorzugt ist, wird zwischen der Außenseite des Schutzgitters und den Laufradflügeln ein so großer Abstand gebildet, dass der Abstand zwischen den einzelnen Stäben oder Streben des Schutzgitters gegenüber dem bislang üblichen Maß erheblich vergrößert werden darf. Hierdurch wird der Strömungswiderstand des Schutzgitters klein gehalten.In the case of the flow rectifier according to the invention, the unit consisting of the nozzle ring, the retaining sleeve and the air guide vanes arranged therebetween, assumes the entire supporting function for the electric motor. This unit is designed as an integral molded part, in particular made of plastic. The nozzle ring at the same time forms the receiving space for the impeller of the fan and protects it in the radial direction. On the side facing away from the receiving space for the impeller side of the air vanes, a protective grid is provided, which ensures a protection against contact in the axial direction. If the air guide vanes have an axial extent in the range of 4 to 8 cm, which is preferred, such a large distance is formed between the outside of the protective grille and the impeller blades, that the Distance between the individual bars or struts of the protective grid compared to the usual extent may be increased considerably. As a result, the flow resistance of the protective grid is kept small.

Es ist hervorzuheben, dass das genannte Gitter beim erfindungsgemäßen Strömungsgleichrichter nur Berührungsschutzfunktion hat, die Haltefunktion für den eigentlichen Ventilator übernimmt, wie bereits erwähnt, die integrale Einheit aus Düsenring, Luftleitschaufeln und Haltemanschette, doch trägt das Berührungsschutzgitter zur Stabilität bei, da es integral mit den übrigen Komponenten des Strömungsgleichrichters verbunden ist.It should be noted that the said grid in the flow straightener according to the invention has only contact protection function, the holding function for the actual fan takes over, as already mentioned, the integral unit of the nozzle ring, air guide vanes and retaining sleeve, but contributes to the protection against the grid stability, since it is integral with the remaining components of the flow straightener is connected.

Das Berührungsschutzgitter besteht aus konzentrisch zueinander verlaufenden Ringen, die durch radial verlaufende Streben miteinander verbunden sind. Es ist mit den übrigen Bestandteilen der Konstruktion einteilig gespritzt. Dabei übernehmen die Luftleitschaufeln die Funktion der radialen Streben des Berührungsschutzgitters, da die Ringe desselben mit den abströmseitigen Rändern der Luftleitschaufeln integral verbunden sind.The contact protection grid consists of concentric rings, which are interconnected by radially extending struts. It is injected in one piece with the other components of the construction. The air guide vanes take over the function of the radial struts of the contact protection grid, since the rings thereof are integrally connected to the downstream edges of the air guide vanes.

Der Düsenring hat vorzugsweise eine Konizität von etwa 2°. Er öffnet sich in Richtung vom Berührungsschutzgitter weg, was das Entformen bei der Herstellung erleichtert bzw. überhaupt erst ermöglicht. Diese Konizität sichert zugleich einen Wasserablauf nach außen bei horizontaler Montage der Ventilatorwelle.The nozzle ring preferably has a taper of about 2 °. It opens in the direction away from the contact protection grid, which facilitates demolding during manufacture or even makes it possible in the first place. This conicity ensures at the same time a water drain to the outside with horizontal mounting of the fan shaft.

In einer bevorzugten Ausführungsform hat der Düsenring einen umlaufenden Flanschring, der seine Montage auch an Gehäusewänden ermöglicht, die nicht mit Düseneinlaufstutzen versehen sind. Diese Gehäuse können daher aus nicht tiefziehfähigem Blech hergestellt werden, was ihre Herstellung verbilligt. Vorzugsweise hat der Flanschring mehrere in Umfangsrichtung verteilt angeordnete, radial nach außen stehende Montagelaschen mit Bohrungen für die Aufnahme von Schrauben oder Stehbolzen. Mit Hilfe dieser Montagelaschen ist der Düsenring über einer Öffnung, beispielsweise einer Gehäuseöffnung, montierbar.In a preferred embodiment, the nozzle ring has a circumferential flange, which allows its mounting on housing walls, which are not provided with nozzle inlet nozzle. These housings can therefore be made of non-deep drawing sheet metal, which makes their production cheaper. Preferably, the flange has a plurality of circumferentially distributed, radially outwardly standing mounting tabs with holes for receiving screws or studs. With the help of these mounting tabs of the nozzle ring over an opening, such as a housing opening, can be mounted.

Eine besonders vorteilhafte Ergänzung des Düsenrings, die seine Montage hinter einer Öffnung, die in einem plattenförmigen Bauelement, beispielsweise in einer Gehäusewand, ausgebildet ist, erleichtert, besteht aus einem Zusatzdüsenring, der aus einem im wesentlichen radial verlaufenden Flanschring und einem mit diesem über eine Einlaufkrümmung integral verbundenen Einsteckring besteht, der einen Außendurchmesser hat, der kleiner als der Innendurchmesser des Düsenrings an seiner dem Berührungsschutz abgewandten Seite ist. An dem Flanschring sind fluchtend mit den Bohrungen im Düsenring Stehbolzen ausgebildet, die sich achsparallel in gleicher Richtung wie der Einsteckring erstrecken. Dieser Zusatzdüsenring kann somit in eine entsprechend dimensionierte Gehäuseöffnung eingesteckt werden, wobei die Stehbolzen in der Gehäusewand ausgebildete Bohrungen durchdringen. Bei der Montage wird auf den Zusatzdüsenring der den Ventilator tragende Düsenring so aufgesteckt, dass die Montagelaschen von den Stehbolzen durchdrungen werden. Mit Hilfe von Muttern ist dann der Düsenring an dem Zusatzdüsenring festzulegen. Aufgrund dieser Konstruktion braucht das Gehäuse, an dem die Anordnung anzubringen ist, keine Einlaufdüse und auch keine Stehbolzen zur Befestigung des Düsenrings aufzuweisen. Der Zusatzdüsenring begünstigt das Einströmen von Luft in den Ventilator.A particularly advantageous supplement of the nozzle ring, which facilitates its installation behind an opening formed in a plate-shaped component, for example in a housing wall, consists of an additional nozzle ring which consists of a substantially radially extending flange ring and one with this via an inlet curvature integrally connected Einsteckring consists, which has an outer diameter which is smaller than the inner diameter of the nozzle ring on its side facing away from contact. On the flange are formed in alignment with the holes in the nozzle ring studs extending axially parallel in the same direction as the Einsteckring. This additional nozzle ring can thus be inserted into a correspondingly dimensioned housing opening, wherein the stud bolts penetrate holes formed in the housing wall. During assembly, the fan ring bearing nozzle ring is attached to the additional nozzle ring so that the mounting tabs are penetrated by the studs. With the help of nuts then the nozzle ring is set on the additional nozzle ring. Due to this construction, the housing to which the assembly is to be mounted need not have an inlet nozzle and also stud bolts for fixing the nozzle ring. The additional nozzle ring promotes the inflow of air into the fan.

Für die Wirkung des Ventilators sind die Abmessungen des Strömungsgleichrichters von hoher Bedeutung. Die Luftleitschaufeln, die im Sinne eines Leitrades wirken und abströmseitig vom Ventilator angeordnet sind, müssen passend zum Ventilatorlaufrad dimensioniert werden. Dem Fachmann sind solche Dimensionierungsvorschriften bekannt. Nur beispielhaft kann auf die DE 94 22 006 U1 verwiesen werden, in der die Geometrie von Luftleitschaufeln ausführlich beschrieben ist.For the effect of the fan, the dimensions of the flow straightener are of great importance. The air vanes, which act in the sense of a stator and are arranged downstream of the fan must be sized to match the fan impeller. The person skilled in such dimensioning rules are known. Only by way of example can on the DE 94 22 006 U1 in which the geometry of air vanes is described in detail.

Die Erfindung wird nachfolgend unter Benzugnahme auf ein in den Zeichnungen dargestelltes Ausführungsbeispiel näher erläutert. Es zeigt:

  • Fig. 1 eine perspektivische Darstellung einer Ausführungsform eines Strömungsgleichrichters nach der Erfindung ohne Berührungsschutzgitter;
  • Fig. 2 den Strömungsgleichrichter von Fig. 1 mit Berührungsschutzgitter;
  • Fig. 3 eine perspektivische Darstellung eines Zusatzdüsenrings von seiner Einströmseite her gesehen;
  • Fig. 4 eine perspektivische Darstellung des Zusatzdüsenrings von Fig. 3 von seiner Abströmseite her gesehen;
  • Fig. 5 eine Gehäusewand mit Öffnung zur Aufnahme des Zusatzdüsenrings;
  • Fig. 6 die Gehäusewand von Fig. 5 mit in die Öffnung eingestecktem Zusatzdüsenring;
  • Fig. 7 den erfindungsgemäßen Strömungsgleichrichter in einem zur Montage an der Anordnung von Fig. 6 bereiten Zustand, und
  • Fig. 8 den fertig montierten Strömungsgleichrichter.
The invention will be explained in more detail below with reference to an exemplary embodiment illustrated in the drawings. It shows:
  • Fig. 1 a perspective view of an embodiment of a flow straightener according to the invention without contact guards;
  • Fig. 2 the flow straightener of Fig. 1 with contact protection grid;
  • Fig. 3 a perspective view of an additional nozzle ring seen from its inflow side;
  • Fig. 4 a perspective view of the additional nozzle ring of Fig. 3 seen from its downstream side;
  • Fig. 5 a housing wall with an opening for receiving the additional nozzle ring;
  • Fig. 6 the housing wall of Fig. 5 with additional nozzle ring inserted in the opening;
  • Fig. 7 the flow straightener according to the invention in a for mounting on the assembly of Fig. 6 prepare condition, and
  • Fig. 8 the fully assembled flow straightener.

In Fig. 1 ist der erfindungsgemäße Strömungsgleichrichter ohne Berührungsschutzgitter dargestellt, um seine Luftleitschaufeln besser erkennbar zu machen. Gemäß Fig.1 besteht der Strömungsgleichrichter aus einem Düsenring 1, der eine leicht konische Umfangswand 1a hat, an deren einen axialen Ende ein umlaufender Flanschring 1b ausgebildet ist. Umfangswand 1a und Flanschring 1b sind durch mehrere Streben 1c aneinander abgestützt und verstärkt.In Fig. 1 the flow straightener according to the invention is shown without contact protection grid to make its air guide blades better recognizable. According to Fig.1 the flow straightener consists of a nozzle ring 1, which has a slightly conical peripheral wall 1a, at whose one axial end a circumferential flange 1b is formed. Peripheral wall 1a and flange 1b are supported and reinforced by a plurality of struts 1c.

Im Inneren des Düsenrings 1 erstrecken sich mehrere, im dargestellten Beispiel 13 feststehende Luftleitschaufeln 2, die mit der Innenseite der Umfangswand 1 a integral verbunden sind. Die Luftleitschaufeln 2 enden an ihren anderen, inneren Enden an einer Haltemanschette 3, die zur Aufnahme und Halterung eines Elektromotors (nicht dargestellt) bestimmt und dimensioniert ist. Wie sich aus Fig. 1 ergibt, nehmen die Luftleitschaufeln 2 in axialer Richtung des Düsenrings 1 nicht den vollen Raum desselben ein, sondern lassen einen Aufnahmeraum frei, in dem das Laufrad des Ventilators (nicht dargestellt) umlaufen kann. Der Antriebsmotor für das Laufrad ist also von der in Fig. 1 sichtbaren Oberseite her in die von der Haltemanschette bestimmte Öffnung eingesteckt und an der Haltemanschette 3 befestigt, während das Laufrad auf der anderen Seite, hier die Unterseite, auf die Motorwelle aufgesteckt und an dieser befestigt ist.In the interior of the nozzle ring 1, a plurality of fixed in the example shown 13 air guide vanes 2, which are integrally connected to the inside of the peripheral wall 1 a. The air guide vanes 2 terminate at their other, inner ends on a retaining sleeve 3, which is intended and dimensioned for receiving and holding an electric motor (not shown). As it turned out Fig. 1 results, take the air guide vanes 2 in the axial direction of the nozzle ring 1 is not the full space of the same, but leave a receiving space free, in which the impeller of the fan (not shown) can rotate. The drive motor for the impeller is thus of the in Fig. 1 visible top inserted forth in the particular of the retaining sleeve opening and attached to the retaining sleeve 3, while the impeller on the other side, here the bottom, attached to the motor shaft and secured thereto.

Man erkennt weiter, dass an dem Düsenring 1 mehrere, im vorliegenden Falle vier in Umfangsrichtung verteilte, radial nach außen vorstehende Montagelaschen 4 ausgebildet sind, in denen Bohrungen 5 für die Aufnahme von Schrauben oder Stehbolzen vorgesehen sind.It can be seen further that on the nozzle ring 1 more, in the present case four circumferentially distributed, radially outwardly projecting mounting tabs 4 are formed, in which holes 5 are provided for receiving screws or studs.

Fig. 2 zeigt die Konstruktion von Fig. 1 an einem tragenden Bauelement 6, beispielsweise an einer Gehäusewand montiert und mit einem Berührungsschutzgitter 7 versehen. Das Schutzgitter 7 besteht aus mehreren konzentrischen Ringen 7a, die im dargestellten Beispiel durch radial verlaufende Streben 7b integral miteinander verbunden sind. Diese Konstruktion Die Luftleitschaufeln 2 übernehmen die Funktion der radialen Streben 7b, weil die Ringe 7a mit den abströmseitigen Rändern der Luftleitschaufeln integral verbunden sind, beispielsweise durch einen gemeinsamen, einzigen Spritzformvorgang. Fig. 2 shows the construction of Fig. 1 mounted on a supporting component 6, for example on a housing wall and provided with a contact protection grid 7. The protective grid 7 consists of a plurality of concentric rings 7a, which are integrally connected to each other in the example shown by radially extending struts 7b. This construction The air vanes 2 take over the function of the radial struts 7b, because the rings 7a are integrally connected to the downstream edges of the air vanes, for example by a common, single injection molding operation.

Zur Befestigung des Düsenrings 1 an dem tragenden Bauelement 6 können an diesem Stehbolzen ausgebildet sein, oder es kann Löcher für die Aufnahme von Schraubbolzen aufweisen. Besonders elegant gestaltet sich die Montage unter zur Hilfenahme eines Zusatzdüsenrings, an dem Stehbolzen ausgebildet sind. Hierzu wird auf die nachfolgenden Figuren 3 bis 8 Bezug genommen.To attach the nozzle ring 1 to the supporting member 6 may be formed on this stud, or it may have holes for receiving bolts. The assembly is particularly elegant with the aid of an additional nozzle ring on which studs are formed. This is done on the following FIGS. 3 to 8 Referenced.

Fig. 3 zeigt einen Zusatzdüsenring 8 von seiner Einströmseite her. In Bezug auf Fig. 2 wäre das dessen Unterseite. Der Zusatzdüsenring 8 hat einen im wesentlichen radial verlaufenden Flanschring 8a und einen mit diesem über eine Einlaufkrümmung integral verbundenen Einsteckring 8b. Die Abmessungen des Einsteckrings 8b sind auf die des Düsenrings 1 so abgestimmt, dass der Zusatzdüsenring 8 in den Düsenring 1 eingesteckt werden kann. Weiterhin sind an dem Flanschring 8a mehrere Stehbolzen 8c angebracht, von denen in Fig. 3 einer teilweise sichtbar ist und die sich in der gleichen Richtung erstrecken, wie der Einsteckring 8b. Die Lage der Stehbolzen 8c ist in Bezug auf die Lage der Bohrung 5 an der Düse 1 so abgestimmt, dass der Düsenring 1 auf die Stehbolzen 8c aufgesteckt werden kann. Fig. 3 shows an additional nozzle ring 8 from its inflow side. In relation to Fig. 2 that would be the bottom of it. The additional nozzle ring 8 has a substantially radially extending flange 8a and an integral with this via an inlet curvature Einsteckring 8b. The dimensions of the Einsteckrings 8b are matched to that of the nozzle ring 1 so that the additional nozzle ring 8 can be inserted into the nozzle ring 1. Furthermore, a plurality of studs 8c are attached to the flange 8a, of which in Fig. 3 one is partially visible and extending in the same direction as the male ring 8b. The position of the stud bolts 8c is adjusted with respect to the position of the bore 5 on the nozzle 1 so that the nozzle ring 1 can be plugged onto the stud bolts 8c.

Fig. 4 zeigt den Zusatzdüsenring 8 in einem für die Montage bereiten Zustand von seiner Abströmseite her. Darüber ist in Fig. 5 ein tragendes Bauelement, beispielsweise eine Gehäusewand 6 dargestellt, die eine Öffnung 6a hat, die zur Aufnahme des Einsteckrings 8b dimensioniert ist. Weiterhin hat die Gehäusewand 6 vier Bohrungen 6b an zur Lage der Stehbolzen 8c passenden Stellen. Fig. 4 shows the additional nozzle ring 8 in a ready for assembly state from its downstream side. About it is in Fig. 5 a supporting component, such as a housing wall 6 is shown, which has an opening 6a, which is dimensioned to receive the Einsteckrings 8b. Furthermore, the housing wall 6 has four holes 6b to the position of the studs 8c matching points.

Fig. 6 zeigt den Zusatzdüsenring 8 im an der Gehäusewand 6 montierten Zustand. Der Einsteckring 8b ist durch die Gehäuseöffnung 6a hindurch gesteckt, die Stehbolzen 8c durchdringen die für sie vorgesehenen Bohrungen in der Gehäusewand 6, und Muttern 8d sind auf die Stehbolzen 8c aufgeschraubt, um den Zusatzdüsenring an der Gehäusewand 6 zu sichern. Der in Fig. 7 gezeigte Strömungsgleichrichter 1 ist zur Montage auf der so vorbereiteten Gehäusewand 6 bereit. Fig. 6 shows the additional nozzle ring 8 mounted on the housing wall 6 state. The Einsteckring 8b is inserted through the housing opening 6a, the studs 8c penetrate the holes provided for them in the housing wall 6, and nuts 8d are screwed onto the stud bolts 8c to the additional nozzle ring on the housing wall 6 to to back up. The in Fig. 7 shown flow rectifier 1 is ready for mounting on the thus prepared housing wall 6.

In Fig. 8 ist der Düsenring 1 auf den Einsteckring 8b (nicht sichtbar) aufgesteckt, und dabei sind seine Bohrungen 5 (Fig. 1) in den Montagelaschen 4 von den Stehbolzen 8c durchdrungen. Schließlich ist auf die Stehbolzen 8c jeweils eine Haltemutter 8e aufgeschraubt.In Fig. 8 the nozzle ring 1 is attached to the Einsteckring 8b (not visible), and its holes are 5 ( Fig. 1 ) penetrated in the mounting tabs 4 of the studs 8c. Finally, a retaining nut 8e is screwed onto the stud bolts 8c.

In die nach Fig. 8 vorbereitete Anordnung kann von der Oberseite ein Elektromotor eingesteckt und an der Haltemanschette 3 befestigt werden. Das Laufrad des Ventilators ist dann von der anderen Seite her, das heißt hier von der Unterseite her, an der Motorwelle zu befestigen.In the after Fig. 8 Prepared arrangement can be inserted from the top of an electric motor and attached to the retaining sleeve 3. The impeller of the fan is then from the other side, that is here from the bottom, to attach to the motor shaft.

Claims (6)

  1. Flow straightener for a fan, consisting of a nozzle ring (1) which narrows conically in the interior from an input side to an output side and which on the input side is provided with a mounting flange ring (1b) integrally connected to it, a holding sleeve (3) arranged concentrically in the nozzle ring (1) for a fan motor, a plurality of air guide vanes (2) which extend substantially radially between the nozzle ring (1) and the holding sleeve (3) and which are integrally connected to the nozzle ring (1) and the holding sleeve (3) and occupy only a partial axial region of the nozzle ring (1), leaving a receiving chamber for a fan wheel located upstream of the air guide vanes (2) within the chamber encompassed by the nozzle ring (1), as well as a protective grid (7) connected to the nozzle ring (1) on the output side of the nozzle ring (1), the protective grid (7) having several concentric rings (7a) which are connected to each other by radially extending struts (7b),
    characterised
    in that the protective grid (7) is an integral, rigidly connected part of the flow straightener on the output side thereof, and
    in that the concentric rings (7a) of the protective grid (7) are integrally connected to the edges of the air guide vanes (2) on the output side.
  2. Flow straightener according to any of the preceding claims, characterised in that the air guide vanes (2) have an axial extent within the range from 4 to 8 cm.
  3. Flow straightener according to any of the preceding claims, characterised in that the nozzle ring (1) has a conicity of approximately 2°.
  4. Flow straightener according to any of the preceding claims, characterised in that the nozzle ring (1) has several radially outwardly projecting mounting strips (4) with holes (5) distributed in the circumferential direction, for receiving screws or studs (8c).
  5. Flow straightener according to any of the preceding claims, characterised in that it is a plastic injection moulding.
  6. Flow straightener according to claim 4, characterised in that it is supplemented by an additional nozzle ring (a) for mounting in and behind an opening (6a) in a plate-shaped component (6), consisting of an additional nozzle ring (8) which consists of a substantially radially extending flange ring (8a) and an insertion ring (8b) which is integrally connected to the latter by a delivery curve and which has an outside diameter which is smaller than the inside diameter of the nozzle ring (1) on its side facing away from the protective grid (7), wherein on the flange ring (8a) in alignment with the holes (5) in the nozzle ring (1) are formed studs (8c) which extend with parallel axes in the same direction as the insertion ring (8b).
EP06018108A 2006-08-30 2006-08-30 Flow director for a fan Not-in-force EP1895166B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT06018108T ATE422619T1 (en) 2006-08-30 2006-08-30 FLOW RECTIFIER FOR A FAN
EP06018108A EP1895166B1 (en) 2006-08-30 2006-08-30 Flow director for a fan
DE502006002832T DE502006002832D1 (en) 2006-08-30 2006-08-30 Flow straightener for a fan

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06018108A EP1895166B1 (en) 2006-08-30 2006-08-30 Flow director for a fan

Publications (2)

Publication Number Publication Date
EP1895166A1 EP1895166A1 (en) 2008-03-05
EP1895166B1 true EP1895166B1 (en) 2009-02-11

Family

ID=37685963

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06018108A Not-in-force EP1895166B1 (en) 2006-08-30 2006-08-30 Flow director for a fan

Country Status (3)

Country Link
EP (1) EP1895166B1 (en)
AT (1) ATE422619T1 (en)
DE (1) DE502006002832D1 (en)

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Also Published As

Publication number Publication date
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DE502006002832D1 (en) 2009-03-26
ATE422619T1 (en) 2009-02-15

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