EP0922862A2 - Axial fan for ventilating systems - Google Patents

Axial fan for ventilating systems Download PDF

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Publication number
EP0922862A2
EP0922862A2 EP98122961A EP98122961A EP0922862A2 EP 0922862 A2 EP0922862 A2 EP 0922862A2 EP 98122961 A EP98122961 A EP 98122961A EP 98122961 A EP98122961 A EP 98122961A EP 0922862 A2 EP0922862 A2 EP 0922862A2
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EP
European Patent Office
Prior art keywords
insert ring
axial fan
impeller
blades
housing
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
EP98122961A
Other languages
German (de)
French (fr)
Other versions
EP0922862A3 (en
EP0922862B1 (en
Inventor
Volker Fröhlich
Frank Wahl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TLT Turbo GmbH
Original Assignee
Turbo-Lufttechnik GmbH
Turbo Lufttechnik GmbH
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Publication of EP0922862A2 publication Critical patent/EP0922862A2/en
Publication of EP0922862A3 publication Critical patent/EP0922862A3/en
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Publication of EP0922862B1 publication Critical patent/EP0922862B1/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
    • F04D29/08—Sealings
    • F04D29/16—Sealings between pressure and suction sides
    • F04D29/161—Sealings between pressure and suction sides especially adapted for elastic fluid pumps
    • F04D29/164—Sealings between pressure and suction sides especially adapted for elastic fluid pumps of an axial flow wheel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F04D19/002—Axial flow fans
    • 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
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
    • F04D29/526—Details of the casing section radially opposing blade tips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/50—Intrinsic material properties or characteristics
    • F05D2300/502—Thermal properties

Definitions

  • the invention relates to an axial fan for Ventilation systems for the combined ventilation and Smoke extraction company with the features of the generic term of Claim 1.
  • Axial fans are used in ventilation technology for both ventilation and smoke extraction in Fire must be suitable.
  • One is with axial fans strives to leave a small impeller gap between the Bucket tips and the inner wall of the housing to be observed optimal values in terms of acoustics, aerodynamics Behavior, the efficiency and the vibration behavior of the Achieve axial fan.
  • Fire temperature must withstand far above normal Room temperature. Stretches under these operating conditions the impeller and the housing are different. Here the case may occur that the impeller expands so far that it brushes against the housing. It is essential to prevent this.
  • the invention has for its object the generic To design axial fan so that a combined ventilation and Smoke extraction operation of the axial fan in each case optimal conditions is possible.
  • the arrangement of the insert ring allows the Impeller gap to be set between the ventilation case Flow tips and the insert ring fluidically lay out correctly so that the axial fan in this Operating case runs optimally.
  • the insert ring is replaced by the Blade tips rubbed off. This brings the Impeller gap between the now enlarged impeller diameter and the reduced thickness of the insert ring on the bottom these operating conditions are the correct flow values on. This means that the axial fan also gets under in the event of a fire optimal conditions.
  • the axial fan shown is used for ventilation of Structures and is for combined ventilation and Smoke extraction suitable.
  • the axial fan contains a Housing 1, which is provided with two connecting flanges 2.
  • In the housing 1 is an impeller 3 and a motor pot 4th arranged.
  • the motor pot 4 takes a motor 5 for the drive of the impeller 3.
  • the impeller 3 consists of a Motor 5 driven shaft 6, from a hub 7 and out in the Hub 7 arranged, preferably adjustable blades 8th.
  • annular Flow channel 9 Between the housing 1 on the one hand and the motor pot 4 and the Hub 7 of the impeller 3, on the other hand, is annular Flow channel 9 through which the pumped medium in the direction of Arrows 10 is promoted. Downstream from the blades 8 are fixed guide vanes 11 in the flow channel 9 arranged.
  • an insert ring 12 is used, which is on the inside of the Housing 1 is attached.
  • This insert ring 12 consists of a material that is used in normal operation, i.e. for ventilation of rooms with promotion of indoor air, wear-resistant and at least briefly during a one-off Smoke extraction is heat-resistant.
  • the distance of the peaks the blades 8 from the inner wall of the housing 1 0.2 to 2%, and the distance between the tips of the blades 8 from the inside of the insert ring 12 is 0.0 to 0.5% of the impeller diameter.
  • the impeller gap is designed to be fluidly correct.
  • the axial fan should remove smoke and fire gases from Promote elevated temperature.
  • the material of the insert ring 12 is now chosen so that it is mechanical compared to the material the impeller 3 with mutual friction stress between Impeller 3 and insert ring 12 are wearing. Since that Impeller 3 under the influence of the elevated temperature of the Pumped medium expands and thereby increases in diameter now the tips of the blades 8 the insert ring 12 rub without coming into contact with the housing 1.
  • the thickness of the insert ring 12 should be chosen so that the Never touch the blades 8 on the housing 1.
  • FIGS. 4 and 5 The mode of operation of the insert ring 12 is shown in FIGS. 4 and 5 shown clearly.
  • Fig. 4 the axial fan is in its original form, as it was for the Ventilation operation comes into question.
  • Fig. 5 shows that the Diameter of the impeller 3 due to the increased The temperature of the hot smoke and combustion gases has increased.
  • the Tips of the blades 8 have a part of the insert ring 12 rubbed, so that in turn an impeller gap of less Height between the impeller 3 and the now changed insert ring 12 exists.
  • the front edge plane of the insert ring 12 is smooth and stands at an angle of 90 ° to the axis of the shaft 6 of the impeller 3.
  • the insert ring 12 is the largest possible Bucket setting angle as flush as possible Impeller entry level 13 installed to ensure a flawless To ensure flow against the impeller 3. With smaller ones
  • the blade leading angle is the front edge of the blade slightly above. If the insert ring 12 is not flush with Front edge of the blades 8 placed and is on the On the inflow side, in the event of a fire, it becomes the front Protruding area not sanded. This allows it to go through a bad flow against the expanded impeller 3 come to a stall. The impeller 3 then runs in one Bead that looks like a wheel gap that is too large. A little However, the insert ring 12 protrudes by a few mm harmless.
  • the insert ring 12 extends at least over that of the Blades 8 coated area. He can also use the Trailing edge of the blades 8 out to the rear Edge of the hub 7 or reach up to the guide vanes 11.
  • the Trailing edge of the insert ring 12 can be just like that Leading edge be smooth or tapered in diameter Run in housing 1.
  • the material used for the insert ring 12 is flexible and consists preferably of fiber mats, which as webs to the Round shape of the housing 1 can be adjusted.
  • the insert ring 12 can consist of one or more layers 14 one above the other be built, glued to the inner wall of the housing 1 or be fastened with the aid of rivets 15. These rivets 15 are in smoke extraction mode by the blades 8 rubbed together with the insert ring 12.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Abstract

An insert ring (12) is fastened on the inside wall of the housing (1) and comprises a material which does not wear in use and which wears during smoke removal. The distance of the tips of the blades (8) from the inside wall of the housing is preferably 0.2-2.0% of the impeller diameter and from the inside of the insert ring is 0-0.5% of the impeller diameter.

Description

Die Erfindung betrifft einen Axialventilator für Lüftungsanlagen für den kombinierten Lüftungs- und Entrauchungsbetrieb mit den Merkmalen des Oberbegriffes des Anspruches 1.The invention relates to an axial fan for Ventilation systems for the combined ventilation and Smoke extraction company with the features of the generic term of Claim 1.

In der Lüftungstechnik werden Axialventilatoren eingesetzt, die sowohl für den Lüftungsfall als auch für die Entrauchung im Brandfall geeignet sein müssen. Bei Axialventilatoren ist man bestrebt, einen kleinen Laufradspalt zwischen den Laufschaufelspitzen und der Gehäuseinnenwand einzuhalten, um optimale Werte im Hinblick auf die Akustik, das aerodynamische Verhalten, den Wirkungsgrad und das Schwingungsverhalten des Axialventilators zu erreichen. Für den Brandfall besteht die Forderung, daß der Ventilator eine definierte Zeitspanne Brandtemperatur standhalten muß, die weit über der normalen Raumtemperatur liegen. Unter diesen Betriebsbedingungen dehnt sich das Laufrad und das Gehäuse unterschiedlich aus. Dabei kann der Fall eintreten, daß sich das Laufrad soweit aufweitet, daß es am Gehäuse anstreift. Dies ist unbedingt zu verhindern. Man ist daher gezwungen, den Laufradspalt von kombinierten Lüftungs- und Brandgasventilator soweit zu vergrößern, daß ein Anstreifen des Laufrades aufgrund der Wärmedehnung und der bleibenden Dehnung bei hohen Umfangsgeschwindigkeiten nicht auftreten kann. Eine solche Vergrößerung des Laufradspaltes führt jedoch zu enormen aerodynamischen Leistungseinbußen und zur Schallerhöhung, die für den Einsatz der Brandgasaxialventilatoren im Lüftungsbetrieb nicht hinnehmbar sind.Axial fans are used in ventilation technology for both ventilation and smoke extraction in Fire must be suitable. One is with axial fans strives to leave a small impeller gap between the Bucket tips and the inner wall of the housing to be observed optimal values in terms of acoustics, aerodynamics Behavior, the efficiency and the vibration behavior of the Achieve axial fan. In the event of fire there is Requirement that the fan have a defined period of time Fire temperature must withstand far above normal Room temperature. Stretches under these operating conditions the impeller and the housing are different. Here the case may occur that the impeller expands so far that it brushes against the housing. It is essential to prevent this. One is therefore forced to combine the impeller gap To enlarge ventilation and fire gas fan so far that a Brushing the impeller due to thermal expansion and permanent elongation at high peripheral speeds can occur. Such an enlargement of the impeller gap however, leads to enormous aerodynamic performance losses and to increase noise, which is necessary for the use of Fire gas axial fans in ventilation mode not acceptable are.

Der Erfindung liegt die Aufgabe zugrunde, den gattungsgemäßen Axialventilator so zu gestalten, daß ein kombinierter Lüftungs- und Entrauchungsbetrieb des Axialventilators jeweils unter optimalen Bedingungen möglich ist.The invention has for its object the generic To design axial fan so that a combined ventilation and Smoke extraction operation of the axial fan in each case optimal conditions is possible.

Diese Aufgabe wird bei einem gattungsgemäßen Axialventilator erfindungsgemäß durch die kennzeichnenden Merkmale des Anspruches 1 gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.This task is performed with a generic axial fan according to the invention by the characterizing features of Claim 1 solved. Advantageous embodiments of the invention are the subject of the subclaims.

Durch die Anordnung des Einlegeringes läßt sich der im Lüftungsfall einzustellende Laufradspalt zwischen den Laufschaufelspitzen und dem Einlegering strömungstechnisch korrekt auslegen, so daß der Axialventilator in diesem Betriebsfall optimal läuft. In dem Maße, wie das Laufrad im Brandfall bei der Entrauchung mit ansteigender Temperatur des Fördermediums wächst, wird der Einlegering durch die Laufschaufelspitzen abgerieben. Dadurch nähert sich der Laufradspalt zwischen dem jetzt vergrößerten Laufraddurchmesser und dem in der Dicke verringerten Einlegering auf den unter diesen Betriebsverhältnissen strömungstechnisch korrekten Wert an. Damit läuft der Axialventilator auch im Brandfall unter optimalen Bedingungen.The arrangement of the insert ring allows the Impeller gap to be set between the ventilation case Flow tips and the insert ring fluidically lay out correctly so that the axial fan in this Operating case runs optimally. To the extent that the impeller in Fire event during smoke extraction with increasing temperature of the Medium increases, the insert ring is replaced by the Blade tips rubbed off. This brings the Impeller gap between the now enlarged impeller diameter and the reduced thickness of the insert ring on the bottom these operating conditions are the correct flow values on. This means that the axial fan also gets under in the event of a fire optimal conditions.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher erläutert. Es zeigen:

  • Fig. 1 den Längsschnitt durch einen Axialventilator,
  • Fig. 2 die Seitenansicht nach Fig. 1,
  • Fig. 3 die Einzelheit Z nach Fig. 2,
  • Fig. 4 schematisch einen Axialventilator im Lüftungsfall und
  • Fig. 5 schematisch einen Axialventilator im Entrauchungsfall.
    • An embodiment of the invention is shown in the drawing and is explained in more detail below. Show it:
  • 1 shows the longitudinal section through an axial fan,
  • 2 shows the side view of FIG. 1,
  • 3 shows the detail Z according to FIG. 2,
  • Fig. 4 shows schematically an axial fan in the case of ventilation and
  • Fig. 5 shows schematically an axial fan in the case of smoke extraction.

    • Der dargestellte Axialventilator dient der Belüftung von Bauwerken und ist für den kombinierten Lüftungs- und Entrauchungsbetrieb geeignet. Der Axialventilator enthält ein Gehäuse 1, das mit zwei Anschlußflanschen 2 versehen ist. In dem Gehäuse 1 sind ein Laufrad 3 und ein Motortopf 4 angeordnet. Der Motortopf 4 nimmt einen Motor 5 für den Antrieb des Laufrades 3 auf. Das Laufrad 3 besteht aus einer durch den Motor 5 angetriebenen Welle 6, aus einer Nabe 7 und aus in der Nabe 7 angeordneten, vorzugsweise einstellbaren Laufschaufeln 8.The axial fan shown is used for ventilation of Structures and is for combined ventilation and Smoke extraction suitable. The axial fan contains a Housing 1, which is provided with two connecting flanges 2. In the housing 1 is an impeller 3 and a motor pot 4th arranged. The motor pot 4 takes a motor 5 for the drive of the impeller 3. The impeller 3 consists of a Motor 5 driven shaft 6, from a hub 7 and out in the Hub 7 arranged, preferably adjustable blades 8th.

    Zwischen dem Gehäuse 1 einerseits und dem Motortopf 4 und der Nabe 7 des Laufrades 3 andererseits besteht ein ringförmiger Strömungskanal 9, durch den das Fördermedium in Richtung der Pfeile 10 gefördert wird. Stromabwärts von den Laufschaufeln 8 sind in dem Strömungskanal 9 feststehende Leitschaufeln 11 angeordnet.Between the housing 1 on the one hand and the motor pot 4 and the Hub 7 of the impeller 3, on the other hand, is annular Flow channel 9 through which the pumped medium in the direction of Arrows 10 is promoted. Downstream from the blades 8 are fixed guide vanes 11 in the flow channel 9 arranged.

    In den Laufradspalt zwischen dem Gehäuse 1 und dem Laufrad 3 ist ein Einlegering 12 eingesetzt, der an der Innenseite des Gehäuses 1 befestigt ist. Dieser Einlegering 12 besteht aus einem Werkstoff, der im Normalbetrieb, das heißt zur Lüftung von Räumen unter Förderung von Raumluft, verschleißfest und zumindest kurzfristig während eines einmaligen Entrauchungsfalles wärmebeständig ist. Der Abstand der Spitzen der Laufschaufeln 8 von der Innenwand des Gehäuses 1 beträgt 0,2 bis 2 %, und der Abstand der Spitzen der Laufschaufeln 8 von der Innenseite des Einlegeringes 12 beträgt 0,0 bis 0,5 % des Laufraddurchmessers. Im Normal- oder Lüftungsbetrieb ist der Laufradspalt strömungstechnisch korrekt ausgelegt.In the impeller gap between the housing 1 and the impeller 3 an insert ring 12 is used, which is on the inside of the Housing 1 is attached. This insert ring 12 consists of a material that is used in normal operation, i.e. for ventilation of rooms with promotion of indoor air, wear-resistant and at least briefly during a one-off Smoke extraction is heat-resistant. The distance of the peaks the blades 8 from the inner wall of the housing 1 0.2 to 2%, and the distance between the tips of the blades 8 from the inside of the insert ring 12 is 0.0 to 0.5% of the impeller diameter. In normal or ventilation mode the impeller gap is designed to be fluidly correct.

    Im Brandfall soll der Axialventilator Rauch- und Brandgase von erhöhter Temperatur fördern. Der Werkstoff des Einlegeringes 12 ist nun so gewählt, daß er mechanisch gegenüber dem Werkstoff des Laufrades 3 bei gegenseitiger Reibbeanspruchung zwischen Laufrad 3 und Einlegering 12 verschleißend ist. Da sich das Laufrad 3 unter dem Einfluß der erhöhten Temperatur des Fördermediums dehnt und dadurch im Durchmesser wächst, werden jetzt die Spitzen der Laufschaufeln 8 den Einlegering 12 abreiben, ohne mit dem Gehäuse 1 in Berührung zu kommen. Die Dicke des Einlegeringes 12 ist so zu wählen, daß die Laufschaufeln 8 niemals an dem Gehäuse 1 anstreifen. Durch das Abtragen des Einlegeringes 12 stellt sich im Entrauchungsbetrieb bzw. im Brandfall ein Laufradspalt von optimaler Breite selbsttätig ein.In the event of a fire, the axial fan should remove smoke and fire gases from Promote elevated temperature. The material of the insert ring 12 is now chosen so that it is mechanical compared to the material the impeller 3 with mutual friction stress between Impeller 3 and insert ring 12 are wearing. Since that Impeller 3 under the influence of the elevated temperature of the Pumped medium expands and thereby increases in diameter now the tips of the blades 8 the insert ring 12 rub without coming into contact with the housing 1. The The thickness of the insert ring 12 should be chosen so that the Never touch the blades 8 on the housing 1. By the Removal of the insert ring 12 turns in Smoke extraction operation or in the event of fire an impeller gap of optimal width automatically.

    Die Wirkungsweise des Einlegeringes 12 ist in den Fig. 4 und 5 anschaulich gezeigt. In Fig. 4 ist der Axialventilator in seiner ursprünglichen Form dargestellt, wie er für den Lüftungsbetrieb in Frage kommt. Die Fig. 5 zeigt, daß sich der Durchmesser des Laufrades 3 aufgrund der angestiegenen Temperatur der heißen Rauch- und Brandgase vergrößert hat. Die Spitzen der Laufschaufeln 8 haben einen Teil des Einlegeringes 12 abgerieben, so daß wiederum ein Laufradspalt von geringer Höhe zwischen dem Laufrad 3 und dem nun veränderten Einlegering 12 besteht.The mode of operation of the insert ring 12 is shown in FIGS. 4 and 5 shown clearly. In Fig. 4 the axial fan is in its original form, as it was for the Ventilation operation comes into question. Fig. 5 shows that the Diameter of the impeller 3 due to the increased The temperature of the hot smoke and combustion gases has increased. The Tips of the blades 8 have a part of the insert ring 12 rubbed, so that in turn an impeller gap of less Height between the impeller 3 and the now changed insert ring 12 exists.

    Die Vorderkantenebene des Einlegeringes 12 ist glatt und steht unter einem Winkel von 90° zur Achse der Welle 6 des Laufrades 3. Der Einlegering 12 ist bei dem größtmöglichen Schaufeleinstellwinkel möglichst bündig zur Laufradeintrittsebene 13 eingebaut, um eine einwandfreie Anströmung des Laufrades 3 zu gewährleisten. Bei kleineren Schaufeleinstellwinkeln steht die Schaufelvorderkante geringfügig über. Wird der Einlegering 12 nicht bündig zur Vorderkante der Laufschaufeln 8 plaziert und steht an der Anströmseite über, so wird im Brandfall dieser vorne überstehende Bereich nicht abgeschliffen. Dadurch kann es durch eine schlechte Anströmung des aufgeweiteten Laufrades 3 zu einem Strömungsabriß kommen. Das Laufrad 3 läuft dann in einer Sicke, die wie ein zu großer Laufradspalt wirkt. Ein geringer Überstand des Einlegeringes 12 von wenigen mm ist jedoch unschädlich.The front edge plane of the insert ring 12 is smooth and stands at an angle of 90 ° to the axis of the shaft 6 of the impeller 3. The insert ring 12 is the largest possible Bucket setting angle as flush as possible Impeller entry level 13 installed to ensure a flawless To ensure flow against the impeller 3. With smaller ones The blade leading angle is the front edge of the blade slightly above. If the insert ring 12 is not flush with Front edge of the blades 8 placed and is on the On the inflow side, in the event of a fire, it becomes the front Protruding area not sanded. This allows it to go through a bad flow against the expanded impeller 3 come to a stall. The impeller 3 then runs in one Bead that looks like a wheel gap that is too large. A little However, the insert ring 12 protrudes by a few mm harmless.

    Der Einlegering 12 erstreckt sich mindestens über den von den Laufschaufeln 8 bestrichenen Bereich. Er kann auch über die Abströmkante der Laufschaufeln 8 hinaus bis zur rückwärtigen Kante der Nabe 7 oder bis zu den Leitschaufeln 11 reichen. Die Abströmkante des Einlegeringes 12 kann ebenso wie die Anströmkante glatt sein oder konisch in den Durchmesser des Gehäuses 1 einlaufen.The insert ring 12 extends at least over that of the Blades 8 coated area. He can also use the Trailing edge of the blades 8 out to the rear Edge of the hub 7 or reach up to the guide vanes 11. The Trailing edge of the insert ring 12 can be just like that Leading edge be smooth or tapered in diameter Run in housing 1.

    Das für den Einlegering 12 verwendete Material ist biegsam und besteht vorzugsweise aus Fasermatten, die als Bahnen an die runden Form des Gehäuse 1 angepaßt werden. Der Einlegering 12 kann aus einer oder mehreren Schichten 14 übereinander aufgebaut werden, die an der Innenwand des Gehäuse 1 angeklebt oder mit Hilfe von Nieten 15 befestigt werden. Diese Nieten 15 werden im Entrauchungsbetrieb durch die Laufschaufeln 8 zusammen mit dem Einlegering 12 abgerieben.The material used for the insert ring 12 is flexible and consists preferably of fiber mats, which as webs to the Round shape of the housing 1 can be adjusted. The insert ring 12 can consist of one or more layers 14 one above the other be built, glued to the inner wall of the housing 1 or be fastened with the aid of rivets 15. These rivets 15 are in smoke extraction mode by the blades 8 rubbed together with the insert ring 12.

    Claims (7)

    Axialventilator für Lüftungsanlagen für den kombinierten Lüftungs- und Entrauchungsbetrieb mit einem in einem Gehäuse (1) umlaufenden, mit Laufschaufeln (8) versehenen Laufrad (3), wobei zwischen den Spitzen der Laufschaufeln (8) und der Innenwand des Gehäuses (1) ein Laufradspalt besteht, dadurch gekennzeichnet, daß in dem Laufradspalt ein Einlegering (12) angeordnet ist, der an der Innenwand des Gehäuses (1) befestigt ist und daß der Einlegering (12) aus einem Werkstoff besteht, der im Lüftungsbetrieb im wesentlichen verschleißfrei und im Entrauchungsbetrieb verschleißend ist.Axial fan for ventilation systems for the combined Ventilation and smoke extraction operation with one in one housing (1) rotating impeller provided with blades (8) (3), between the tips of the blades (8) and there is an impeller gap on the inner wall of the housing (1), characterized in that in the impeller gap Insert ring (12) is arranged on the inner wall of the Housing (1) is attached and that the insert ring (12) a material that is used in ventilation in essentially wear-free and in smoke extraction is wearing out. Axialventilator nach Anspruch 1, dadurch gekennzeichnet, daß der Abstand der Spitzen der Laufschaufeln (8) von der Innenwand des Gehäuses (1) 0,2 bis 2 % und der Abstand der Spitzen der Laufschaufeln (8) von der Innenseite des Einlegeringes (12) 0,0 bis 0,5 % des Laufraddurchmessers beträgt.Axial fan according to claim 1, characterized in that the distance of the tips of the blades (8) from the Inner wall of the housing (1) 0.2 to 2% and the distance of the Tips of the blades (8) from the inside of the Insert ring (12) 0.0 to 0.5% of the impeller diameter is. Axialventilator nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Einlegering (12) mit der Anströmkante der Laufschaufeln (8) abschließt oder geringfügig über die Anströmkante vorsteht.Axial fan according to claim 1 or 2, characterized characterized in that the insert ring (12) with the Leading edge of the blades (8) closes or protrudes slightly beyond the leading edge. Axialventilator nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Einlegering (12) mindestens der Breite des von dem Laufrad (3) bestrichenen Bereiches entspricht.Axial fan according to one of claims 1 to 3, characterized characterized in that the insert ring (12) at least the Width of the area covered by the impeller (3) corresponds. Axialventilator nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Einlegering (12) über die Abströmkante der Laufschaufeln (8) hinausragt. Axial fan according to one of claims 1 to 4, characterized characterized in that the insert ring (12) over the The trailing edge of the blades (8) protrudes. Axialventilator nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Einlegering (12) aus flexiblen Fasermatten besteht, die an die Innenwand des Gehäuses (1) angeformt und dort befestigt sind.Axial fan according to one of claims 1 to 5, characterized characterized in that the insert ring (12) made of flexible There is fiber mats that on the inner wall of the housing (1) molded and attached there. Axialventilator nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der Einlegering (12) aus einem wärmebeständigen Werkstoff besteht.Axial fan according to one of claims 1 to 6, characterized characterized in that the insert ring (12) from a heat-resistant material.
    EP98122961A 1997-12-13 1998-12-03 Axial fan for ventilating systems Expired - Lifetime EP0922862B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE19755615 1997-12-13
    DE19755615A DE19755615A1 (en) 1997-12-13 1997-12-13 Axial fan for ventilation systems

    Publications (3)

    Publication Number Publication Date
    EP0922862A2 true EP0922862A2 (en) 1999-06-16
    EP0922862A3 EP0922862A3 (en) 2000-04-12
    EP0922862B1 EP0922862B1 (en) 2003-07-16

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    ID=7851917

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP98122961A Expired - Lifetime EP0922862B1 (en) 1997-12-13 1998-12-03 Axial fan for ventilating systems

    Country Status (3)

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    EP (1) EP0922862B1 (en)
    AT (1) ATE245255T1 (en)
    DE (2) DE19755615A1 (en)

    Families Citing this family (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE202015104163U1 (en) 2015-08-07 2016-11-10 Systemair GmbH Rotor blades for an axial fan

    Family Cites Families (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    GB851267A (en) * 1958-04-28 1960-10-12 Gen Motors Corp Improvements relating to axial-flow compressors
    GB879740A (en) * 1959-01-02 1961-10-11 Axia Fans Ltd Apparatus for expurging an enclosed space of gaseous media fouling the atmosphere therein
    DE4423447A1 (en) * 1994-07-05 1996-01-11 Turbo Lufttechnik Gmbh Axial ventilator with motor=driven fan
    DE4439726A1 (en) * 1994-11-09 1996-05-15 Siemens Ag Rotor wheel for electric ventilator or fan

    Non-Patent Citations (1)

    * Cited by examiner, † Cited by third party
    Title
    None

    Also Published As

    Publication number Publication date
    ATE245255T1 (en) 2003-08-15
    DE19755615A1 (en) 1999-06-17
    EP0922862A3 (en) 2000-04-12
    DE59809019D1 (en) 2003-08-21
    EP0922862B1 (en) 2003-07-16

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