EP1617086B1 - Support strut for protection grid and fabricating method thereof - Google Patents

Support strut for protection grid and fabricating method thereof Download PDF

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Publication number
EP1617086B1
EP1617086B1 EP05014897A EP05014897A EP1617086B1 EP 1617086 B1 EP1617086 B1 EP 1617086B1 EP 05014897 A EP05014897 A EP 05014897A EP 05014897 A EP05014897 A EP 05014897A EP 1617086 B1 EP1617086 B1 EP 1617086B1
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EP
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Prior art keywords
support strut
fan
protection grid
holding
fixing
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EP05014897A
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German (de)
French (fr)
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EP1617086A2 (en
EP1617086A3 (en
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Uwe Stadtmüller
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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
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards

Definitions

  • the invention relates to a support strut for protective grille for fans and method for their preparation.
  • Protective grids protect fan rotors, for example from axial fans, against external contact. They consist of generally arranged concentrically to the axis of rotation of the fan motor grid rings made of wire, which are attached to radially arranged, serving as support arms supporting struts, are usually welded.
  • the support struts can hairpin-like bent wire loops, such as those in the DE 33 11 660 C2 or the DE 101 11 397 A1 are shown exist. Its spatial form receives the protective grid by repeatedly bending the support struts with different angles ( DE 299 00 923 U1 ).
  • the protective grille on the wall, in which the fan is installed attached.
  • the support struts of the fan motor with its stator or its bearing plate with the protective grid is firmly screwed.
  • These joints have to endure a high load.
  • the bending moment which exerts the fan motor on the guard, the rotation caused by the moment and all other forces caused by the fan function, such as vibrations, arrival and Abbremsmomente u. a. transferred to the support struts of the protective grid. Therefore, both the support struts and their joints must be made particularly stable.
  • the supporting strut according to the invention with its characterizing features of claim 1 has the advantage that the required for attachment to or in a wall and for receiving the fan motor means no longer need to be attached as separately manufactured fasteners to the support strut by a joining process, but that they are already part of the support strut during their production.
  • the support bar made solely by the advantageous forming thus has immediately after completion of all bending operations at its two ends the respective required fastening means. As a result, neither welding operations nor special weld pretreatments are required for the coating, which considerably simplifies the production of the support strut.
  • a significant advantage is also that they are as a one-piece manufactured part can be coated without problems, so that corrosion due to a lack of coating in the critical areas of their installation with a wall ring or fan is avoided from the outset.
  • the support strut is a forming part, d. H. the receiving angle for receiving the fan and / or the bracket for mounting the protective grid on or in a wall are formed by bending operations on the flat profile.
  • This has the advantage that simple flat steel can be used as the starting material. This production variant is particularly favorable and thus also cost-saving.
  • the support strut may be a stamped part. This type of production will be selected if either bending devices for bending flat profiles over the high edge are not available or the material used does not allow bending over the high edge.
  • the support strut is punched in its the form of the protective grid determining main contour of a metal sheet, with length and subsequent arrangement of the respective recording or holding angle in the design of the stamped part (unwinding) must be considered. After punching recording or holding angle are only bent in their corresponding position.
  • the support strut consists of a casting. Since this type of production requires the production of a casting mold, however, it only makes sense if sufficient economic efficiency still exists.
  • Fig. 1 shown front view is the shape of a support strut according to the invention, which is the spatial shape of the Protective grid intended to recognize. It was made of a flat steel and has a long leg 1 and a short leg 2 bent at right angles to it over the high edge of the flat steel. The long leg 1 is angled twice in front of its free end by the same angle, but in opposite directions over the high edge. This gives the guard along its radius two different heights, whereby it is adapted to the shape of the rotor blades, not shown here of the axial fan. At the free end of the long leg 1, a receiving angle 3 for fixing the axial fan is formed, which is provided with a bore 4.
  • the receiving angle 3 is produced by two bending operations on the inner free end of the support strut.
  • the flat steel is bent at right angles over the high edge in the same direction as the short leg 2. This bent end is now bent over the material thickness of the flat steel by 90 °, resulting from the FIGS. 2 and 3 becomes recognizable.
  • the stretched length of this free end of the flat steel required before the bending operations can be precisely calculated. Due to the exact right-angled bending of the flat steel over the high edge of the Auf.cwinkel 3 is after the second bending process also exactly perpendicular to the flat profile.
  • This arrangement of receiving angle 3 and bracket 5 of the support strut is required when the mounting plane runs on or in the wall parallel to the mounting plane of the axial fan, which in particular also from the FIGS. 2 and 3 is recognizable. If these two attachment planes do not run parallel to one another, the support strut can, as in FIGS 4 to 6 be designed shown. How out Fig. 4 recognizable, this support also consists of a long leg 1 'and an obtuse angle to this bent over the high edge of the flat steel short leg 2'. The long leg 1 'is in contrast to the support strut acc. Fig. 1 just angled.
  • Out Fig. 4 is also the previously described obtuse angled portion of the short leg 2 'in the same direction as the bending of the long leg 1' recognizable. Both bends determine the profile of the fan grille. However, in order to be able to mount the protective grid in a plane of attachment of a wall lying at right angles to the receiving plane of the axial fan, the holding bracket 5 'provided therefor must also be provided by the support bar Fig. 1 to 3 described double bending process can be generated. Again, the first bending process about the high edge is in about Fig. 4 can still be recognized by the bending radius at the end of the short leg 2 ', but here takes place in contrast to the bending of the free end of the long leg 1' by exactly a right angle.
  • the bending method for producing the support struts described in these two embodiments are technologically very advantageous because only flat steel is used as the starting material.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

The support strut for protective grills for fans consists of a flat profile multiply angled over its vertical edge, with means to accommodate the fan connected to the flat profile's free inner ends orientated towards the fan, and means for the fastening of the protective grill on or in a wall connected to the opposite lying outer free ends. The means to accommodate the fan and/or the means for the fastening of the protective grill are component parts of the support strut. An independent claim is included for a method for the manufacture of a support strut in which angling of the flat profile is produced by bending over its vertical edge, and means to accommodate the fan and/or means for the fastening of the protective grill are formed directly on the flat profile by at least one bending action of the profile's free ends.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einer Tragstrebe für Schutzgitter für Lüfter sowie Verfahren zu ihrer Herstellung.The invention relates to a support strut for protective grille for fans and method for their preparation.

Schutzgitter schützen Lüfterrotore, beispielsweise von Axiallüftern, gegen Berührung von außen. Sie bestehen aus im allgemeinen konzentrisch zur Drehachse des Lüftermotors angeordneten Gitterringen aus Draht, die an radial angeordneten, als Halterungsarme dienenden Tragstreben befestigt, meist angeschweißt sind. Die Tragstreben können aus haarnadelartig gebogenen Drahtschlaufen, wie sie beispielsweise in der DE 33 11 660 C2 oder der DE 101 11 397 A1 gezeigt sind, bestehen. Seine räumliche Gestalt erhält das Schutzgitter durch ein mehrfaches Abwinkeln der Tragstreben mit unterschiedlichen Winkeln ( DE 299 00 923 U1 ).Protective grids protect fan rotors, for example from axial fans, against external contact. They consist of generally arranged concentrically to the axis of rotation of the fan motor grid rings made of wire, which are attached to radially arranged, serving as support arms supporting struts, are usually welded. The support struts can hairpin-like bent wire loops, such as those in the DE 33 11 660 C2 or the DE 101 11 397 A1 are shown exist. Its spatial form receives the protective grid by repeatedly bending the support struts with different angles ( DE 299 00 923 U1 ).

In der Regel sind die Schutzgitter an der Wandung, in die der Lüfter eingebaut wird, befestigt. An dem gegenüberliegenden, also auf dem Innenkreis des Schutzgitters liegenden Ende der Tragstreben ist der Lüftermotor mit seiner Statorbuchse bzw. seinem Lagerschild mit dem Schutzgitter fest verschraubt. Diese Verbindungsstellen haben eine hohe Belastung auszuhalten. Über sie werden das Biegemoment, das der Lüftermotor auf das Schutzgitter ausübt, das durch die Rotation hervorgerufene Moment sowie alle anderen durch die Lüfterfunktion bedingten Kräfte, wie Schwingungen, An- und Abbremsmomente u. a. auf die Tragstreben des Schutzgitters übertragen. Daher müssen sowohl die Tragstreben als auch ihre Verbindungsstellen besonders stabil ausgebildet sein. Für größere Lüfter, beispielsweise mit Axialmotoren ab einer Baugröße von 710 mm Durchmesser werden aus einem Flachprofil bestehende Tragstreben verwendet, wobei das Flachprofil über seine hohe Kante gebogen ist. Die Tragstreben erhalten hierdurch eine hohe Biegesteifigkeit. Um die Tragstrebe an dem Lüftermotor sowie in der Wandung, beispielsweise mittels eines Wandringes, zu befestigen, müssen an den Enden der Tragstreben Befestigungsmittel vorgesehen sein. Zur Befestigung mit dem Wandring ist an dem äußeren Ende der Tragstrebe eine mit Bohrungen versehene Lasche angeschweißt. Mittels Schrauben wird die Lasche auf den Wandring aufgeschraubt. Zur Verbindung mit dem Lüftermotor sind die Tragstreben mit ihrem inneren Ende an einen ebenfalls mit Bohrungen versehenen Flanschring angeschweißt, der mit dem Lüftermotor verschraubt wird.In general, the protective grille on the wall, in which the fan is installed, attached. At the opposite, so lying on the inner circle of the protective grid end of the support struts of the fan motor with its stator or its bearing plate with the protective grid is firmly screwed. These joints have to endure a high load. About them, the bending moment, which exerts the fan motor on the guard, the rotation caused by the moment and all other forces caused by the fan function, such as vibrations, arrival and Abbremsmomente u. a. transferred to the support struts of the protective grid. Therefore, both the support struts and their joints must be made particularly stable. For larger fans, for example, with axial motors from a size of 710 mm diameter existing support struts are used from a flat profile, the flat profile is bent over its high edge. The support struts thereby obtain a high bending stiffness. In order to secure the support strut to the fan motor and in the wall, for example by means of a wall ring, fastening means must be provided at the ends of the support struts. For attachment to the wall ring a hole provided with holes is welded to the outer end of the support strut. By means of screws, the tab is screwed onto the wall ring. To connect to the fan motor, the support struts are welded with their inner end to a likewise provided with bores flange ring, which is bolted to the fan motor.

Der Nachteil dieser Tragstreben besteht darin, dass ihre Herstellung aufgrund der erforderlichen Lasche und des Flanschringes sowie der beiden notwendigen Schweißverbindungen sehr aufwendig ist. Diese Schweißverbindungen müssen aufgrund der geforderten Stabilität von besonderer Güte sein. Da die Lüftergitter zum Zweck des Korrosionsschutzes beschichtet, meist pulverbeschichtet, werden, müssen die Schweißnähte einer speziellen Vorbehandlung vor dem Beschichtungsvorgang unterzogen werden, um eine gute Haftung des Beschichtungsmaterials zu erzielen. Abgesehen von dem damit verbundenen zusätzlichen Aufwand haftet die Beschichtung nicht dauerhaft an fehlerhaften Stellen der Schweißnaht, beispielsweise Gas- oder Schlackeeinschlüsscn, die auch nicht durch die spezielle Vorbehandlung beseitigt werden können. Solche Stellen sind dann cher korrosionsanfällig als andere Bereiche der Tragstrebe, so dass die Tragstreben in der Folge gerade an diesen für die Stabilität der gesamten Lüfteranordnung wesentlichen Bereichen zu korrodieren beginnen.The disadvantage of this support struts is that their production is very expensive due to the required tab and the flange ring and the two necessary welds. These welds must be due to the required stability to be of special kindness. Since the fan guards for the purpose of corrosion protection coated, usually powder-coated, the welds must be subjected to a special pre-treatment before the coating process in order to achieve good adhesion of the coating material. Apart from the associated additional expense, the coating does not adhere permanently to faulty areas of the weld, for example, gas or Schlackeeinschlüsscn, which can not be eliminated by the special pre-treatment. Such locations are then prone to corrosion as other areas of the support strut, so that the support struts begin to corrode in the sequence just at these essential for the stability of the entire fan assembly areas.

Die Erfindung und ihre VorteileThe invention and its advantages

Die erfindungsgemäße Tragstrebe mit ihren kennzeichnenden Merkmalen des Patentanspruches 1 hat demgegenüber den Vorteil, dass die für die Befestigung an oder in einer Wandung sowie zur Aufnahme des Lüftermotors erforderlichen Mittel nicht mehr als separat hergestellte Befestigungsteile an der Tragstrebe durch einen Fügevorgang befestigt werden müssen, sondern dass sie bereits bei ihrer Herstellung Bestandteil der Tragstrebe sind. Die allein durch das vorteilhafte Umformen hergestellte Tragstrebe besitzt also sofort nach Abschluss aller Biegevorgänge an ihren beiden Enden das jeweils erforderliche Befestigungsmittel. Dadurch sind weder Schweißvorgänge noch spezielle Schweißnahtvorbehandlungen für die Beschichtung erforderlich, was die Herstellung der Tragstrebe wesentlich vereinfacht. Ein wesentlicher Vorteil besteht darüber hinaus darin, dass sie sich als ein aus einem Stück gefertigtes Teil ohne Probleme beschichten lässt, so dass Korrosion aufgrund einer mangelhaften Beschichtung in den kritischen Bereichen ihrer Montage mit einem Wandring bzw. Lüfter von vorn herein vermieden wird. Die einteilige Ausführung, d. h, die Integration der Befestigungsmittel in die Tragstrebe, hat darüber hinaus den Vorteil, dass zur Verbindung mit dem Lüfter ein Flanschring nicht mehr erforderlich ist. Vielmehr kann der innere Aufnahmewinkel jeder Tragstrebe direkt mit dem Stator des Lüftermotors verbunden werden.The supporting strut according to the invention with its characterizing features of claim 1 has the advantage that the required for attachment to or in a wall and for receiving the fan motor means no longer need to be attached as separately manufactured fasteners to the support strut by a joining process, but that they are already part of the support strut during their production. The support bar made solely by the advantageous forming thus has immediately after completion of all bending operations at its two ends the respective required fastening means. As a result, neither welding operations nor special weld pretreatments are required for the coating, which considerably simplifies the production of the support strut. A significant advantage is also that they are as a one-piece manufactured part can be coated without problems, so that corrosion due to a lack of coating in the critical areas of their installation with a wall ring or fan is avoided from the outset. The one-piece design, d. h, the integration of the fastening means in the support strut, moreover has the advantage that a flange ring is no longer required for connection to the fan. Rather, the inner receiving angle of each support strut can be connected directly to the stator of the fan motor.

Nach einer vorteilhaften Ausgestaltung der Erfindung ist die Tragstrebe ein Umformteil, d. h. der Aufnahmewinkel zur Aufnahme des Lüfters und/oder der Haltewinkel zur Befestigung des Schutzgitters an oder in einer Wandung sind durch Biegevorgänge an das Flachprofil angeformt. Das hat den Vorteil, dass als Ausgangsmaterial einfacher Flachstahl verwendet werden kann. Diese Fertigungsvariante ist besonders günstig und damit auch kostensparend.According to an advantageous embodiment of the invention, the support strut is a forming part, d. H. the receiving angle for receiving the fan and / or the bracket for mounting the protective grid on or in a wall are formed by bending operations on the flat profile. This has the advantage that simple flat steel can be used as the starting material. This production variant is particularly favorable and thus also cost-saving.

Nach einer anderen vorteilhaften Ausgestaltung der Erfindung kann die Tragstrebe ein Stanzteil sein. Diese Art der Herstellung wird man auswählen, wenn entweder Biegevorrichtungen zum Biegen von Flachprofilen über die hohe Kante nicht zur Verfügung stehen oder das verwendete Material ein Biegen über die hohe Kante nicht zulässt. In diesem Fall wird die Tragstrebe in ihrer die Form des Schutzgitters bestimmenden Hauptkontur aus einer Blechtafel ausgestanzt, wobei Länge und spätere Anordnung des jeweiligen Aufnahme- bzw. Haltewinkels bei der Gestaltung des Stanzteils (Abwicklung) berücksichtigt werden müssen. Nach dem Ausstanzen werden Aufnahme- bzw. Haltewinkel lediglich noch in ihre entsprechende Lage gebogen.According to another advantageous embodiment of the invention, the support strut may be a stamped part. This type of production will be selected if either bending devices for bending flat profiles over the high edge are not available or the material used does not allow bending over the high edge. In this case, the support strut is punched in its the form of the protective grid determining main contour of a metal sheet, with length and subsequent arrangement of the respective recording or holding angle in the design of the stamped part (unwinding) must be considered. After punching recording or holding angle are only bent in their corresponding position.

Nach einer zusätzlichen vorteilhaften Ausgestaltung der Erfindung besteht die Tragstrebe aus einem Gussteil. Da diese Fertigungsart die Herstellung einer Gießform erfordert, ist sie allerdings nur dann sinnvoll, wenn trotzdem noch eine ausreichende Wirtschaftlichkeit gegeben ist.According to an additional advantageous embodiment of the invention, the support strut consists of a casting. Since this type of production requires the production of a casting mold, however, it only makes sense if sufficient economic efficiency still exists.

Weitere Vorteile und vorteilhafte Ausgestaltungen der Erfindung sind der nachfolgenden Beispielbeschreibung, den Zeichnungen und den Ansprüchen entnehmbar.Further advantages and advantageous embodiments of the invention are the following example description, the drawings and claims removed.

Zeichnungdrawing

Zwei Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und im Folgenden näher beschrieben. Es zeigen

Fig. 1
die Vorderansicht einer erfindungsgemäßen Tragstrebe, bei der die Ebene der Befestigung am Wandring und die Ebene der Befestigung des Lüftermotors parallel zueinander liegen,
Fig. 2
die Draufsicht auf diese Tragstrebe,
Fig. 3
die Seitenansicht dieser Tragstrebe,
Fig. 4
die Vorderansicht einer erfindungsgemäßen Tragstrebe, bei der die Ebene der Befestigung am Wandring und die Ebene der Befestigung des Lüftermotors senkrecht zueinander stehen,
Fig. 5
die Draufsicht auf diese Tragstrebe und
Fig. 6
die Seitenansicht dieser Tragstrebe.
Two embodiments of the invention are illustrated in the drawings and described in more detail below. Show it
Fig. 1
the front view of a support strut according to the invention, in which the plane of attachment to the wall ring and the plane of attachment of the fan motor are parallel to each other,
Fig. 2
the top view of this support strut,
Fig. 3
the side view of this support strut,
Fig. 4
the front view of a support strut according to the invention, in which the plane of attachment to the wall ring and the plane of attachment of the fan motor are perpendicular to each other,
Fig. 5
the top view of this support strut and
Fig. 6
the side view of this support strut.

Aus der in Fig. 1 dargestellten Vorderansicht ist die Form einer erfindungsgemäßen Tragstrebe, die die räumliche Gestalt des Schutzgitters bestimmt, zu erkennen. Sie wurde aus einem Flachstahl hergestellt und weist einen langen Schenkel 1 sowie einen rechtwinklig zu diesem über die hohe Kante des Flachstahls abgebogenen kurzen Schenkel 2 auf. Der lange Schenkel 1 ist vor seinem freien Ende zweimal um den gleichen Winkel, jedoch in entgegen gesetzten Richtungen über die hohe Kante abgewinkelt. Dadurch erhält das Schutzgitter entlang seines Radius zwei unterschiedlich hohe Bereiche, wodurch es der Form der hier nicht dargestellten Rotorblätter des Axiallüfters angepasst ist. An das freie Ende des langen Schenkels 1 ist ein Aufnahmewinkel 3 zur Befestigung des Axiallüfters angeformt, der mit einer Bohrung 4 versehen ist. Der Aufnahmewinkel 3 wird durch zwei Biegevorgänge an dem inneren freien Ende der Tragstrebe hergestellt. Zunächst wird der Flachstahl rechtwinklig über die hohe Kante in die gleiche Richtung wie der kurze Schenkel 2 gebogen. Dieses abgebogene Ende wird nunmehr über die Materialdicke des Flachstahls um 90° gebogen, was aus den Fig. 2 und 3 erkennbar wird. Unter Berücksichtigung der beiden Biegeradien und der Länge des Aufnahmewinkels 3 lässt sich die vor den Bicgevorgängen benötigte gestreckte Länge dieses freien Endes des Flachstahls genau errechnen. Durch das exakt rechtwinklige Abbiegen des Flachstahls über die hohe Kante steht der Aufnahmcwinkel 3 nach dem zweiten Biegevorgang auch exakt senkrecht von dem Flachprofil ab.From the in Fig. 1 shown front view is the shape of a support strut according to the invention, which is the spatial shape of the Protective grid intended to recognize. It was made of a flat steel and has a long leg 1 and a short leg 2 bent at right angles to it over the high edge of the flat steel. The long leg 1 is angled twice in front of its free end by the same angle, but in opposite directions over the high edge. This gives the guard along its radius two different heights, whereby it is adapted to the shape of the rotor blades, not shown here of the axial fan. At the free end of the long leg 1, a receiving angle 3 for fixing the axial fan is formed, which is provided with a bore 4. The receiving angle 3 is produced by two bending operations on the inner free end of the support strut. First, the flat steel is bent at right angles over the high edge in the same direction as the short leg 2. This bent end is now bent over the material thickness of the flat steel by 90 °, resulting from the FIGS. 2 and 3 becomes recognizable. Taking into account the two bending radii and the length of the receiving angle 3, the stretched length of this free end of the flat steel required before the bending operations can be precisely calculated. Due to the exact right-angled bending of the flat steel over the high edge of the Aufnahmcwinkel 3 is after the second bending process also exactly perpendicular to the flat profile.

Aus den Fig. 2 und 3 ist ferner erkennbar, dass das freie Ende des kurzen Schenkels 2 in der gleichen Richtung wie der Aufnahmewinkel 3 abgewinkelt ist, wodurch ein Haltewinkel 5 entsteht, der zur Befestigung der Tragstrebe an bzw. in einer Wandung ebenfalls mit einer Bohrung 6 versehen ist.From the FIGS. 2 and 3 Furthermore, it can be seen that the free end of the short leg 2 is angled in the same direction as the receiving angle 3, whereby a bracket 5 is formed, which is also provided with a bore 6 for attachment of the support strut on or in a wall.

Diese Anordnung von Aufnahmewinkel 3 und Haltewinkel 5 der Tragstrebe ist dann erforderlich, wenn die Befestigungsebene an bzw. in der Wand parallel zur Befestigungsebene des Axiallüfters verläuft, was insbesondere auch aus den Fig. 2 und 3 erkennbar ist. Verlaufen diese beiden Befestigungsebenen nicht parallel zu einander, kann die Tragstrebe wie in den Fig. 4 bis 6 gezeigt gestaltet sein. Wie aus Fig. 4 erkennbar, besteht auch diese Tragstrebe aus einem langen Schenkel 1' sowie einem stumpfwinklig zu diesem über die hohe Kante des Flachstahls abgebogenen kurzen Schenkel 2'. Der lange Schenkel 1' ist im Unterschied zu der Tragstrebe gem. Fig. 1 nur einfach abgewinkelt. In dieser Darstellung wird auch der kurze Ansatz der technologisch bedingten Abwinkelung des freien Endes des langen Schenkels 1' über die hohe Kante durch den angedeuteten Radius am Ende des langen Schenkels 1' sichtbar. Allerdings erfolgte diese Abwinkelung nicht rechtwinklig, so dass der Aufnahmewinkel 3', der durch die abschließende Biegung des so abgewinkelten freien Endes über die Materialdicke des Flachstahls um 90° entstanden ist, über die eigentliche Länge der Tragstrebe in Richtung der Drehachse des Axiallüfter hinausragt, was auch aus Fig. 5 erkennbar ist.This arrangement of receiving angle 3 and bracket 5 of the support strut is required when the mounting plane runs on or in the wall parallel to the mounting plane of the axial fan, which in particular also from the FIGS. 2 and 3 is recognizable. If these two attachment planes do not run parallel to one another, the support strut can, as in FIGS 4 to 6 be designed shown. How out Fig. 4 recognizable, this support also consists of a long leg 1 'and an obtuse angle to this bent over the high edge of the flat steel short leg 2'. The long leg 1 'is in contrast to the support strut acc. Fig. 1 just angled. In this illustration, the short approach of the technologically induced bending of the free end of the long leg 1 'on the high edge by the indicated radius at the end of the long leg 1' is visible. However, this bend was not perpendicular, so that the receiving angle 3 ', which has arisen by the final bending of the thus angled free end over the material thickness of the flat steel by 90 °, extends beyond the actual length of the support strut in the direction of the axis of rotation of the axial fan, which also from Fig. 5 is recognizable.

Aus Fig. 4 ist auch die zuvor beschriebene stumpfwinklige Abwinkelung des kurzen Schenkels 2' in gleicher Richtung wie die Abwinkelung des langen Schenkels 1' erkennbar. Beide Abwinkelungen bestimmen das Profil des Lüftergitters. Um nun jedoch das Schutzgitter in einer rechtwinklig zu der Aufnahmeebene des Axiallüfters liegenden Befestigungsebene einer Wand montieren zu können, muss der dafür vorgesehene Haltewinkel 5' ebenfalls durch den bereits zu der Tragstrebe aus Fig. 1 bis 3 beschriebenen zweifachen Biegevorgang erzeugt werden. Auch hier ist der erste Biegevorgang über die hohe Kante andentungsweise in Fig. 4 noch durch den Biegeradius an dem Ende des kurzen Schenkels 2' zu erkennen, der hier jedoch im Unterschied zu der Biegung des freien Endes des langen Schenkels 1' um exakt einen rechten Winkel erfolgt. Unmittelbar an diesen Biegeradius schließt sich die zweite, nunmehr aber über die Dicke des Flachstahls geführte rechtwinkelige Biegung des freien Endes des kurzen Schenkels 2' an, so dass der dadurch entstandene Haltewinkel 5' genau rechtwinklig zu dem kurzen Schenkel 2' verläuft, was auch aus dcn Fig. 5 und 6 ersichtlich ist. Zur Befestigung der Tragstrebe an bzw. in einer Wandung ist der Haltewinkel 5' ebenfalls mit einer Bohrung 6' versehen.Out Fig. 4 is also the previously described obtuse angled portion of the short leg 2 'in the same direction as the bending of the long leg 1' recognizable. Both bends determine the profile of the fan grille. However, in order to be able to mount the protective grid in a plane of attachment of a wall lying at right angles to the receiving plane of the axial fan, the holding bracket 5 'provided therefor must also be provided by the support bar Fig. 1 to 3 described double bending process can be generated. Again, the first bending process about the high edge is in about Fig. 4 can still be recognized by the bending radius at the end of the short leg 2 ', but here takes place in contrast to the bending of the free end of the long leg 1' by exactly a right angle. Immediately adjacent to this bending radius, the second, now but over the thickness of the flat steel guided right-angle bend of the free end of the short leg 2 ', so that the resulting bracket 5' exactly right angles to the short leg 2 'runs, which also dcn FIGS. 5 and 6 is apparent. For attachment of the support strut on or in a wall of the bracket 5 'is also provided with a bore 6'.

Die in diesen beiden Ausführungsbeispielen beschriebenen Biegeverfahren zur Herstellung der Tragstreben sind technologisch sehr vorteilhaft, da als Ausgangsmaterial lediglich Flachstahl verwendet wird. Natürlich ist es auch denkbar, derartige Tragstrcben zu gießen oder als kombiniertes Stanz-Biegteil herzustellen.The bending method for producing the support struts described in these two embodiments are technologically very advantageous because only flat steel is used as the starting material. Of course, it is also conceivable to cast such Tragstrcben or produce as a combined stamped and bent part.

Alle in dcr Beschreibung, den nachfolgenden Ansprüchen und den Zeichnungen dargestellten Merkmale können sowohl einzeln als auch in beliebiger Kombination miteinander erfindungswesentlich scin.All in the description, the following claims and the drawings illustrated features can scin both individually and in any combination with each other essential to the invention.

BezugszahlenlisteLIST OF REFERENCE NUMBERS

1; 1'1; 1'
Langer SchenkelLong thigh
2; 2'2; 2 '
kurzer Schenkelshort thigh
3: 3'3: 3 '
Aufnahmewinkelacceptance angle
4; 4'4; 4 '
Bohrungdrilling
5; 5'5; 5 '
Haltewinkelbracket
6; 6'6; 6 '
Bohrungdrilling

Claims (7)

  1. A support strut for protection grid for fans, consisting of a flat profile (1, 1', 2, 2') angled multiple times over its tall edge, to the inner free end of which, directed towards the fan, means (3, 3') for holding the fan are connected, and to the opposite outer free end of which means (5, 5') for fixing the protection grid on or in a wall in a flexurally rigid manner are connected,
    characterized in that
    the means (3, 3') for holding the fan and/or the means (5, 5') for fixing the protection grid are components of the support strut.
  2. The support strut according to Claim 1,
    characterized in that
    the support strut including the means (3, 3') for holding the fan and/or the means (5, 5') for fixing the protection grid is a formed part.
  3. The support strut according to Claim 1,
    characterized in that
    the support strut including the means (3, 3') for holding the fan and/or the means (5, 5') for fixing the protection grid is a punched and formed part.
  4. The support strut according to Claim 1,
    characterized in that
    the support strut including the means (3, 3') for holding the fan and/or the means (5, 5') for fixing the protection grid is a cast part.
  5. A method for fabricating a Support strut according to Claim 1 or 2,
    characterized in that
    the angling of the flat profile (1, 1', 2, 2') takes place by means of bending over its tall edge and the means (3, 3') for holding the fan and/or the means (5, 5') for fixing the protection grid are formed directly on to the flat profile (1, 1', 2, 2'), wherein said forming takes place by angling the free end or ends of the flat profile (1, 1', 2, 2') over the tall edge and by means of a process of bending the previously angled free end or ends over the thickness of the flat profile (1, 1', 2, 2').
  6. The method for fabricating a Support strut according to Claim 1 or 3,
    characterized in that
    the support strut is punched out of flat material and the means (3, 3') for holding the fan and/or the means (5, 5') for fixing the protection grid are formed directly on to said flat material by means of at least one process of bending the free end or ends of the punched-out flat material out of the plane of the punched part.
  7. The method for fabricating a Support strut according to Claim 1 or 4,
    characterized in that
    the support strut including the means (3, 3') for holding the fan and/or the means (5, 5') for fixing the protection grid is cast as a whole part.
EP05014897A 2004-07-16 2005-07-08 Support strut for protection grid and fabricating method thereof Active EP1617086B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004034587A DE102004034587A1 (en) 2004-07-16 2004-07-16 Support strut for protective grille and method for its production

Publications (3)

Publication Number Publication Date
EP1617086A2 EP1617086A2 (en) 2006-01-18
EP1617086A3 EP1617086A3 (en) 2007-01-10
EP1617086B1 true EP1617086B1 (en) 2008-10-22

Family

ID=35058766

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05014897A Active EP1617086B1 (en) 2004-07-16 2005-07-08 Support strut for protection grid and fabricating method thereof

Country Status (3)

Country Link
EP (1) EP1617086B1 (en)
AT (1) ATE412120T1 (en)
DE (2) DE102004034587A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008014702A1 (en) 2008-03-18 2009-09-24 Stadtmüller, Uwe Motor suspension for axial flow fan, has segmented flange ring with four quarter segmental arches including front surfaces, where inner ends of rods are fastened between front surfaces that lie opposite to each other in assembled position
DE102009025025A1 (en) 2008-06-12 2009-12-17 Stadtmüller, Uwe Spatial protective grille for axial fans and method for producing the protective grille

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1871625A (en) * 1931-05-11 1932-08-16 Luff Arthur Seymore Support
US2728541A (en) * 1954-10-29 1955-12-27 Chelsea Products Inc Means to support a motor driven fan from a carrying panel
DE3311660A1 (en) * 1983-03-30 1984-10-04 Siemens AG, 1000 Berlin und 8000 München Axial fan
DE4337631A1 (en) * 1993-11-04 1995-05-11 Kloeckner Humboldt Deutz Ag Protective device for a blower of an internal combustion engine
DE29900923U1 (en) * 1999-01-20 2000-07-06 Mulfingen Elektrobau Ebm Arrangement for the vibration-isolating bracket of an electric motor
DE10111397B4 (en) * 2001-03-09 2010-04-15 Ebm-Papst Mulfingen Gmbh & Co. Kg Protective grille for fans

Also Published As

Publication number Publication date
DE102004034587A1 (en) 2006-02-16
ATE412120T1 (en) 2008-11-15
DE502005005737D1 (en) 2008-12-04
EP1617086A2 (en) 2006-01-18
EP1617086A3 (en) 2007-01-10

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