EP0289735A2 - Housing for a radial blower - Google Patents

Housing for a radial blower Download PDF

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Publication number
EP0289735A2
EP0289735A2 EP88103467A EP88103467A EP0289735A2 EP 0289735 A2 EP0289735 A2 EP 0289735A2 EP 88103467 A EP88103467 A EP 88103467A EP 88103467 A EP88103467 A EP 88103467A EP 0289735 A2 EP0289735 A2 EP 0289735A2
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EP
European Patent Office
Prior art keywords
housing
tongue
jacket
slot
housing according
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
EP88103467A
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German (de)
French (fr)
Other versions
EP0289735B1 (en
EP0289735A3 (en
Inventor
Rainer Fischbach
Willy Dipl.-Ing. Buerger
Werner Ing. Imhäuser
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.)
Fischbach & Cokg Verwaltungsgesellschaft GmbH
Original Assignee
Fischbach & Cokg Verwaltungsgesellschaft GmbH
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Application filed by Fischbach & Cokg Verwaltungsgesellschaft GmbH filed Critical Fischbach & Cokg Verwaltungsgesellschaft GmbH
Priority to AT88103467T priority Critical patent/ATE72600T1/en
Publication of EP0289735A2 publication Critical patent/EP0289735A2/en
Publication of EP0289735A3 publication Critical patent/EP0289735A3/en
Application granted granted Critical
Publication of EP0289735B1 publication Critical patent/EP0289735B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/422—Discharge tongues

Definitions

  • the invention relates to a housing for a radial fan according to the preamble of claim 1.
  • a housing for a radial fan essentially consists of two side parts and a jacket.
  • the side parts are predominantly produced as flat punched sheet metal plates, which are provided with an angled flange on their circumference.
  • the jacket is bent from a flat sheet by one or more rolling operations into the shape corresponding to the circumference of the side parts.
  • the three parts are then connected to one another by spot welding connections between the jacket and the angled flanges of the side parts.
  • housings for radial fans have been developed in which the casing is provided on its two circumferential sides with a radially outwardly angled slot fold, which forms a radially inwardly directed slot (see FIG. 3).
  • the side parts are inserted into this slot with their outer edges, and then the flanges of the fold are pressed together and thus firmly clamp the side parts.
  • the compression can take place, for example, by hammering.
  • the invention has for its object to develop a housing for a radial fan of the type mentioned, which is relatively easy to manufacture and in which the fan can be easily installed and removed, which is important for maintenance purposes.
  • a housing for a radial fan is proposed according to the preamble of claim 1, which according to the invention has the features mentioned in the characterizing part of claim 1.
  • the housing shown in Figures 1 and 2 for a radial fan is constructed from two essentially flat mirror-image side parts 1a, 1b and a jacket 2.
  • the jacket 2 is made of a flat sheet metal strip, the areas of which are angled on the long sides of the sheet metal and each form a slot fold 5 with a slot 6 ( Figure 3).
  • This sheet metal provided with the two slot folds 5 is bent in a bending device into an arc shape which corresponds to the spiral circumferential distance from b to c in FIG. 1. The bending takes place on the side facing away from the slot folds 5, so that the slot folds 5 are radially outward hen and the slots 6 are open radially inwards.
  • the side parts 1a, 1b are inserted into these slots, and then the slot folds are pressed together, so that the side parts 1a, 1b are firmly clamped in them.
  • the compression can be done, for example, by hammering, and the cohesion can be strengthened by embossing points in the fold area.
  • the jacket In the circumferential range from approximately b to d, the jacket consists of a sheet metal which is bent in the circumferential direction into the shape shown in FIG. 1. This part, which is referred to as tongue 4, does not have any lateral slit folds. Because of the large radius of curvature that the tongue has in the bent state, it would not be possible to bend a sheet metal provided with slot folds.
  • the molding strip 11a In order to connect the tongue 4 to the rest of the housing, according to the invention there are two molding strips 11a, 11b constructed in mirror image to one another, of which the molding strip 11a is shown on an enlarged scale in FIGS. 4 and 5.
  • the molding bar In its longitudinal direction, the molding bar is adapted to the course of the periphery of the side part in the range from b to d in FIG. 1.
  • the molding In cross section (FIG. 4), the molding consists of two flanges 12, 13 which are at right angles to one another, each of which is provided with a slot 12a, 13a.
  • the two moldings belonging to a housing are pushed onto one longitudinal side of the tongue 4, and then the tongue 4 with the two moldings is placed on the two side parts 1a, 1b so that the radially outer edges of the side parts in the protrude another slot 12a.
  • the slots 12a, 13a are dimensioned in such a way that they can easily be pushed on by hand with a certain clamping effect of the slots.
  • the tongue 4 is offset radially inwards by a short piece 4a. With this stepped end part, the tongue is pushed under the casing 2 when inserted into the housing.
  • the slots 12a, 13a of the molding are widened at their end facing the jacket 2 over a short distance e (see FIG. 5), so that they can be pushed over the slot fold 5 or the jacket plate.
  • the radially directed flange 12 is preferably made somewhat longer in the longitudinal direction (circumferential direction) of the molding than the axially directed flange 13a receiving the tongue 4.
  • the molding strip is provided with a flange 17 which can be placed on the side part and via which the molding strip can be screwed to the side part by means of a screw 13.
  • the radially outward-pointing flange 12 and the cheek 13b (FIG. 4) of the axially directed flange 13 are removed.
  • the invention provides a housing for a radial fan, in which the casing 2 can be provided with the advantageous slot folds 5 already known and bent.
  • the tongue 4 can be easily inserted with the aid of the molded strips and can be easily removed by loosening the screw 13.
  • the fan wheel 22 can be easily inserted into the housing through this opening.
  • the bearings of the fan wheel are held by a three-arm linkage 21 that can be screwed onto the side parts. Thanks to the radial insertability of the fan wheel 22, the inlet nozzles 20, whose inner diameter is smaller than that of the fan wheel, can be produced by simply impressing the side parts in the region of their central opening.
  • the moldings are preferably designed as injection molded parts and preferably consist of a suitable plastic.

Abstract

Housing for radial blower with two side sections (1a, 1b) and a shell (2), those sides of the shell running in the peripheral direction of the housing being provided with a slotted fold (5) angled radially outwards and open radially inwards to connect the shell to the side sections, into which slotted fold one of each of the side sections protrudes and is fixedly connected to the shell (2) by clamping the slotted fold together. According to the invention the [lacuna] and with a tongue which in the area of the start of the flow duct spiral (9) forms the radially outer wall of the flow duct spiral, is designed as a separate part which forms the shell in the area between the blow out connection (8) and the start area of the flow duct spiral (9). The tongue can be connected to the rest of the housing by means of two moulded fillets (11a, 11b). The moulded fillets (11a, 11b) in their longitudinal direction are adapted to the course of the side sections (1a, 1b) and have a rectangular cross section, each flange of this cross section being provided with an open slot, one of which serves to receive the edge area of the tongue and the other to receive the radially outer edge area of a side section (1a, 1b). <IMAGE>

Description

Die Erfindung betrifft ein Gehäuse für ein Radialgebläse ge­mäß dem Oberbegriff des Anspruches 1.The invention relates to a housing for a radial fan according to the preamble of claim 1.

Ein Gehäuse für ein Radialgebläse besteht im wesentlichen aus zwei Seitenteilen und einem Mantel. Um diese drei Teile zu einem Gehäuse zu verbinden, werden die Seitenteile über­wiegend als flache ausgestanzte Blechplatten hergestellt, die an ihrem Umfang mit einem abgewinkelten Flansch versehen sind. Der Mantel wird aus einem ebenen Blech durch einen oder mehrere Walzvorgänge in die dem Umfang der Seitenteile entsprechenden Form gebogen. Anschließend werden die drei Teile durch Punktschweißverbindungen zwischen dem Mantel und den abgewinkelten Flanschen der Seitenteilen miteinander verbunden.A housing for a radial fan essentially consists of two side parts and a jacket. In order to connect these three parts to form a housing, the side parts are predominantly produced as flat punched sheet metal plates, which are provided with an angled flange on their circumference. The jacket is bent from a flat sheet by one or more rolling operations into the shape corresponding to the circumference of the side parts. The three parts are then connected to one another by spot welding connections between the jacket and the angled flanges of the side parts.

Da dieser Herstellungsprozeß relativ aufwendig ist, wurden Gehäuse für Radialgebläse entwickelt, bei denen der Mantel an seinen beiden in Umfangsrichtung verlaufenden Seiten mit einem radial nach außen abgewinkelten Schlitzfalz versehen ist, der einen radial nach innen gerichteten Schlitz bildet (siehe Figur 3). In diesen Schlitz werden die Seitenteile mit ihren äußeren Rändern eingeführt, worauf anschließend die Flansche des Falzes zusammengedrückt werde und so die Seitenteile fest einklemmen. Das Zusammendrücken kann bei­spielsweise durch Hämmern erfolgen.Since this manufacturing process is relatively complex, housings for radial fans have been developed in which the casing is provided on its two circumferential sides with a radially outwardly angled slot fold, which forms a radially inwardly directed slot (see FIG. 3). The side parts are inserted into this slot with their outer edges, and then the flanges of the fold are pressed together and thus firmly clamp the side parts. The compression can take place, for example, by hammering.

Der Nachteil dieses Herstellungsverfahrens besteht darin, daß der Mantel zwischen dem Anfangsbereich a (siehe Figur 1) der Strömungskanalspirale 9 und dem Ausblasstutzen 8 des Ge­häuses nicht durch Walzen eines mit Schlitzfalzen versehen Bleches hergestellt werden kann, da die Biegung des Mantels in diesem Bereich zu stark ist. Um diese Schwierigkeit zu beheben, ist ein Gehäuse bekannt, bei dem auf die starke Krümmung der Mantelwand in dem genannten Bereich verzichtet wird und die Mantelwand sich vom Anfangsbereich der Strö­mungskanalspirale bis zum Ausblasstutzen etwa geradlinig er­streckt. Um die für den Druckaufbau erforderliche Form der Strömungskanalspirale in ihrem Anfangsbereich zu erreichen, ist bei dieser bekannten Ausführungsform in dem genannten Bereich auf der Innenseite der Mantelwand ein entsprechend geformtes Zusatzteil, eine sogenannte Zunge, angeordnet. Dieser doppelwandige Aufbau des Gehäusemantels im Bereich zwischen dem Anfangsbereich der Strömungskanalspirale und dem Ausblasstutzen stellt jedoch einen erheblichen Mehrauf­wand bei der Herstellung des Gehäuses dar.The disadvantage of this manufacturing process is that the jacket between the initial area a (see FIG. 1) of the flow channel spiral 9 and the outlet port 8 of the housing cannot be produced by rolling a sheet metal provided with slot seams, since the bending of the jacket in this area is too strong is. In order to remedy this difficulty, a housing is known in which the strong curvature of the jacket wall in the area mentioned is dispensed with and the jacket wall extends approximately rectilinearly from the beginning area of the flow channel spiral to the outlet nozzle. In order to achieve the shape of the flow channel spiral required for the pressure build-up in its initial area, a correspondingly shaped additional part, a so-called tongue, is arranged in the known area on the inside of the jacket wall in this known embodiment. However, this double-walled construction of the housing jacket in the area between the start area of the flow channel spiral and the blow-out connector represents a considerable additional outlay in the production of the housing.

Ein weiterer Nachteil dieser bekannten Ausführung besteht darin, daß ein Einbau des Lüfterrades nur durch die Ansaug­öffnung möglich ist, was dazu zwingt, zumindest eine Ein­laufdüse 20 (Figur 2) als abnehmmares Teil auszubilden, um das Lüfterrad achsial von der Seite einführen zu können.Another disadvantage of this known embodiment is that the fan wheel can only be installed through the suction opening, which means that at least one inlet nozzle 20 (FIG. 2) has to be designed as a removable part in order to be able to insert the fan wheel axially from the side.

Der Erfindung liegt die Aufgabe zugrunde, ein Gehäuse für ein Radialgebläse der eingangs genannten Art zu entwickeln, welches in verhältnismäßig einfacher Weise herstellbar ist und in welches sich das Lüfterrad leicht ein- und ausbauen läßt, was für Wartungszwecke wichtig ist.The invention has for its object to develop a housing for a radial fan of the type mentioned, which is relatively easy to manufacture and in which the fan can be easily installed and removed, which is important for maintenance purposes.

Zur Lösung dieser Aufgabe wird ein Gehäuse für ein Radialge­bläse gemäß dem Oberbegriff des Anspruches 1 vorgeschlagen, welches erfindungsgemäß die im kennzeichnenden Teil des An­spruches 1 genannten Merkmale hat.To solve this problem, a housing for a radial fan is proposed according to the preamble of claim 1, which according to the invention has the features mentioned in the characterizing part of claim 1.

Vorteilhafte Ausgestaltungen der Erfindung sind in den wei­teren Ansprüchen genannt.Advantageous embodiments of the invention are mentioned in the further claims.

Anhand der in den Figuren gezeigten Ausführungsbeispiele soll die Erfindung näher erläutert werden. Es zeigen

  • Figur 1 ein Ausführungsbeispiel eines Gehäuses für ein Radi­algebläse gemäß der Erfindung in Seitenansicht mit eingesetztem Lüfterrad,
  • Figur 2 einen Schnitt längs der Linie A-A in Figur 1,
  • Figur 3 das in Figur 2 mit B bezeichnete Detail in ver­größertem Maßstab,
  • Figur 4 das in Figur 2 mit C bezeichnete Detail in ver­größertem Maßstab,
  • Figur 5 einen Schnitt durch einen Teil des Gehäuses gemäß Figur 2 längs der Linie D-D in Figur 2.
The invention will be explained in more detail with reference to the exemplary embodiments shown in the figures. Show it
  • 1 shows an embodiment of a housing for a radial fan according to the invention in a side view with the fan wheel inserted,
  • FIG. 2 shows a section along the line AA in FIG. 1,
  • FIG. 3 shows the detail denoted by B in FIG. 2 on an enlarged scale,
  • FIG. 4 shows the detail denoted by C in FIG. 2 on an enlarged scale,
  • 5 shows a section through part of the housing according to FIG. 2 along line DD in FIG. 2.

Das in den Figuren 1 und 2 dargestellte Gehäuse für ein Ra­dialgebläse ist aufgebaut aus zwei im wesentlichen ebenen spiegelbildlichen Seitenteilen 1a, 1b und einem Mantel 2. Der Mantel 2 wird aus einem ebenen Blechstreifen herge­stellt, dessen Bereiche an den langen Seiten des Bleches ab­gewinkelt werden und je einen Schlitzfalz 5 mit einem Schlitz 6 bilden (Figur 3). Dieses mit den beiden Schlitz­falzen 5 versehene Blech wird in einer Biegevorrichtung in eine Bogenform gebogen, die der spiralförmigen Umfangs­strecke von b bis c in Figur 1 entspricht. Die Biegung er­folgt nach derjenigen Seite, die den Schlitzfalzen 5 abge­wandt ist, so daß die Schlitzfalzen 5 radial nach außen ste­ hen und die Schlitze 6 radial nach innen offen sind. In diese Schlitze werden die Seitenteile 1a, 1b eingeschoben, und anschließend werden die Schlitzfalze zusammengedrückt, so daß die Seitenteile 1a, 1b in ihnen fest verklemmt wer­den. Das Zusammendrücken kann beispielsweise durch Hämmern geschehen, und der Zusammenhalt kann durch Prägestellen im Falzbereich verstärkt werden. In dem Umfangsbereich von etwa b bis d besteht der Mantel aus einem Blech, das in Umfangs­richtung in die in Figur 1 gezeigte Form gebogen ist. Dieses Teil, das als Zunge 4 bezeichnet wird, hat also keine seit­lichen Schlitzfalze. Wegen des starken Krümmungsradius, den die Zunge im gebogenen Zustand aufweist, wäre das Biegen ei­nes mit Schlitzfalzen versehenen Bleches nicht durchführbar.The housing shown in Figures 1 and 2 for a radial fan is constructed from two essentially flat mirror-image side parts 1a, 1b and a jacket 2. The jacket 2 is made of a flat sheet metal strip, the areas of which are angled on the long sides of the sheet metal and each form a slot fold 5 with a slot 6 (Figure 3). This sheet metal provided with the two slot folds 5 is bent in a bending device into an arc shape which corresponds to the spiral circumferential distance from b to c in FIG. 1. The bending takes place on the side facing away from the slot folds 5, so that the slot folds 5 are radially outward hen and the slots 6 are open radially inwards. The side parts 1a, 1b are inserted into these slots, and then the slot folds are pressed together, so that the side parts 1a, 1b are firmly clamped in them. The compression can be done, for example, by hammering, and the cohesion can be strengthened by embossing points in the fold area. In the circumferential range from approximately b to d, the jacket consists of a sheet metal which is bent in the circumferential direction into the shape shown in FIG. 1. This part, which is referred to as tongue 4, does not have any lateral slit folds. Because of the large radius of curvature that the tongue has in the bent state, it would not be possible to bend a sheet metal provided with slot folds.

Um die Zunge 4 mit dem restlichen Gehäuse zu verbinden, sind gemäß der Erfindung zwei zueinander spiegelbildlich aufge­baute Formleiste 11a, 11b vorhanden, von denen die Formlei­ste 11a in den Figuren 4 und 5 in vergrößertem Maßstab dar­gestellt sind. Die Formleiste ist in ihrer Längsrichtung dem Verlauf der Peripherie des Seitenteils im Bereich von b bis d in Figur 1 angepaßt. Im Querschnitt (Figur 4) besteht die Formleiste aus zwei rechtwinklig zueinander stehenden Flan­schen 12, 13, von denen jeder mit einem Schlitz 12a, 13a versehen ist. Mit dem Schlitz 13a werden die beiden zu einem Gehäuse gehörenden Formleisten auf je eine Längsseite der Zunge 4 aufgeschoben, und anschließend wird die Zunge 4 mit den beiden Formleisten so auf die beiden Seitenteile 1a, 1b aufgesetzt, daß die radial äußeren Ränder der Seitenteile in den anderen Schlitz 12a hineinragen. Die Schlitze 12a, 13a sind so bemessen, daß das Aufschieben mit einer gewissen Klemmwirkung der Schlitze leicht von Hand durchführbar ist.In order to connect the tongue 4 to the rest of the housing, according to the invention there are two molding strips 11a, 11b constructed in mirror image to one another, of which the molding strip 11a is shown on an enlarged scale in FIGS. 4 and 5. In its longitudinal direction, the molding bar is adapted to the course of the periphery of the side part in the range from b to d in FIG. 1. In cross section (FIG. 4), the molding consists of two flanges 12, 13 which are at right angles to one another, each of which is provided with a slot 12a, 13a. With the slot 13a, the two moldings belonging to a housing are pushed onto one longitudinal side of the tongue 4, and then the tongue 4 with the two moldings is placed on the two side parts 1a, 1b so that the radially outer edges of the side parts in the protrude another slot 12a. The slots 12a, 13a are dimensioned in such a way that they can easily be pushed on by hand with a certain clamping effect of the slots.

An ihrem vom Ausblasstutzen 8 abgewandten Ende ist die Zunge 4 über ein kurzes Stück 4a radial nach innen abgesetzt. Mit diesem abgesetzten Endteil wird die Zunge beim Einsetzen in das Gehäuse unter den Mantel 2 geschoben.At its end facing away from the blow-out nozzle 8, the tongue 4 is offset radially inwards by a short piece 4a. With this stepped end part, the tongue is pushed under the casing 2 when inserted into the housing.

Die Schlitze 12a,13a der Formleiste sind an ihrem dem Mantel 2 zugewandten Ende auf einer kurzen Strecke e (siehe Figur 5) verbreitert ausgeführt, so daß sie über den Schlitzfalz 5 beziehungsweise das Mantelblech geschoben werden können. Der radial gerichtete Flansch 12 ist in diesem Bereich in Längs­richtung (Umfangsrichtung) der Formleiste vorzugsweise etwas länger ausgebildet als der die Zunge 4 aufnehmende achsial gerichtete Flansch 13a. An dem an den Ausblasstutzen 8 an­grenzenden Ende der Formleiste ist diese mit einem an das Seitenteil anlegbaren Flansch 17 versehen, über den die Formleiste mittels einer Schraube 13 mit dem Seitenteil ver­schraubt werden kann. In diesem Endbereich ist der radial nach außen weisende Flansch 12 sowie die Wange 13b (Figur 4) des achsial gerichteten Flansches 13 weggenommen.The slots 12a, 13a of the molding are widened at their end facing the jacket 2 over a short distance e (see FIG. 5), so that they can be pushed over the slot fold 5 or the jacket plate. In this region, the radially directed flange 12 is preferably made somewhat longer in the longitudinal direction (circumferential direction) of the molding than the axially directed flange 13a receiving the tongue 4. At the end of the molding strip adjoining the blow-out connector 8, the molding strip is provided with a flange 17 which can be placed on the side part and via which the molding strip can be screwed to the side part by means of a screw 13. In this end region, the radially outward-pointing flange 12 and the cheek 13b (FIG. 4) of the axially directed flange 13 are removed.

Durch die Erfindung wird ein Gehäuse für ein Radialgebläse geschaffen, bei welchem der Mantel 2 mit den bereits bekann­ten vorteilhaften Schlitzfalzen 5 versehen und gebogen wer­den kann. In dem stark gebogenen Bereich a der Strömungska­nalspirale 9 ist die Zunge 4 mit Hilfe der Formleisten leicht einsetzbar und durch Lösen der Schraube 13 leicht herausnehmbar. Bei herausgenommener Zunge ist eine Öffnung vorhanden, die sich in Figur 1 etwa waagerecht von b bis c erstreckt. Durch diese Öffnung kann das Lüfterrad 22 bequem in das Gehäuse eingeführt werden. Die Lager des Lüfterrades werden dabei durch ein dreiarmiges an die Seitenteile an­schraubbares Gestänge 21 gehalten. Dank der radialen Ein­führbarkeit des Lüfterrades 22 können die Einlaufdüsen 20, deren Innendurchmesser kleiner als der des Lüfterrades ist, durch einfache Einprägung der Seitenteile im Bereich ihrer zentralen Öffnung hergestellt werden.The invention provides a housing for a radial fan, in which the casing 2 can be provided with the advantageous slot folds 5 already known and bent. In the strongly curved area a of the flow channel spiral 9, the tongue 4 can be easily inserted with the aid of the molded strips and can be easily removed by loosening the screw 13. When the tongue is removed, there is an opening which extends approximately horizontally from b to c in FIG. The fan wheel 22 can be easily inserted into the housing through this opening. The bearings of the fan wheel are held by a three-arm linkage 21 that can be screwed onto the side parts. Thanks to the radial insertability of the fan wheel 22, the inlet nozzles 20, whose inner diameter is smaller than that of the fan wheel, can be produced by simply impressing the side parts in the region of their central opening.

Die Formleisten sind gemäß der Erfindung vorzugsweise als Spritzgußteile ausgeführt und bestehen vorzugsweise aus ei­nem geeigneten Kunststoff.According to the invention, the moldings are preferably designed as injection molded parts and preferably consist of a suitable plastic.

Claims (8)

1. Gehäuse für Radialgebläse mit zwei Seitenteilen (1a,1b) und einem Mantel (2), wobei zur Verbindung des Mantels mit den Seitenteilen der Mantel an seinem in Umfangsrichtung des Gehäuses verlaufenden Seiten mit einem radial nach außen ab­gewinkelten und radial nach innen offenen Schlitzfalz (5) versehen ist, in welchen je eines der Seitenteile hineinragt und durch Zusammenklemmen des Schlitzfalzes fest mit dem Mantel (2) verbunden ist, und mit einer Zunge (4), die im Bereich des Anfangs der Strömungskanalspirale (9) die radial äußere Wand der Strömungskanalspirale bildet, da­durch gekennzeichnet, daß die Zunge (4) als separates Teil ausgebildet ist, welches den Mantel im Bereich zwischen dem Ausblasstutzen (8) und dem Anfangsbe­reich der Strömungskanalspirale (9) bildet, daß die Zunge mittels zweier Formleisten (11a,11b) mit dem übrigen Gehäuse verbindbar ist, daß jede Formleiste (11a,11b) in ihrer Längsrichtung dem Verlauf des Seitenteiles (1a,1b) angepaßt ist und eine im wesentlichen rechtwinkligen Querschnitt hat, wobei jeder Flansch (12,13) des rechtwinkligen Querschnittes mit je einem offenen Schlitz (12a,13a) versehen ist, von denen der eine Schlitz (13a) zur Aufnahme des Randbereiches der Zunge (4) und der andere Schlitz (12a) zur Aufnahme des radial äußeren Randbereiches eines Seitenteils (1a,1b) dient.1. Housing for radial blowers with two side parts (1a, 1b) and a jacket (2), whereby for connecting the jacket to the side parts of the jacket on its circumferential sides of the housing with a radially outwardly angled and radially inwardly open slot fold (5) is provided, in each of which one of the side parts protrudes and is firmly connected to the jacket (2) by clamping the slot fold, and with a tongue (4) which, in the region of the beginning of the flow channel spiral (9), the radially outer wall the flow channel spiral, characterized in that the tongue (4) is designed as a separate part, which forms the jacket in the area between the outlet connector (8) and the initial area of the flow channel spiral (9), that the tongue by means of two molding strips (11a, 11b ) can be connected to the rest of the housing such that each shaped strip (11a, 11b) is adapted in its longitudinal direction to the course of the side part (1a, 1b) and essentially one has a rectangular cross-section, each flange (12, 13) of the rectangular cross-section being provided with an open slot (12a, 13a), one slot (13a) for receiving the edge region of the tongue (4) and the other slot ( 12a) serves to receive the radially outer edge region of a side part (1a, 1b). 2. Gehäuse nach Anspruch 1, dadurch gekenn­zeichnet, daß die Zunge (4) an ihrem dem Ausblasstut­zen (8) abgewandten Ende geringfügig radial nach innen abge­setzt ist und mit dem abgesetzten Teil (4a) überlappend un­ter den Mantel (2) schiebbar ist.2. Housing according to claim 1, characterized in that the tongue (4) is slightly offset radially inward at its end facing away from the blow-out nozzle (8) and can be pushed overlapping with the stepped part (4a) under the casing (2). 3. Gehäuse nach einem der Ansprüche 1 oder 2, da­durch gekennzeichnet, daß die Schlitze (12a,13a) in den Formleisten (11a,11b) an dem vom Ausblas­ stutzen (8) abgewandten Ende derart verbreitert sind, daß sie sich zugleich über den Mantel (2) und dessen Schlitz­falze (5) schieben lassen.3. Housing according to one of claims 1 or 2, characterized in that the slots (12a, 13a) in the moldings (11a, 11b) on the blowout End (8) facing away are widened in such a way that they can simultaneously be pushed over the jacket (2) and its slot folds (5). 4. Gehäuse nach einem der vorhergehenden Ansprüche, da­durch gekennzeichnet, daß jede Formleiste (11a,11b) nahe dem Ausblasstutzen (8) mittels einer lösbaren formschlüssigen Verbindung (13) mit dem zugehörigen Sei­tenteil (1a,1b) verbindbar ist.4. Housing according to one of the preceding claims, characterized in that each molding (11a, 11b) near the blow-out nozzle (8) by means of a releasable positive connection (13) with the associated side part (1a, 1b) can be connected. 5. Gehäuse nach Anspruch 4, dadurch gekenn­zeichnet, daß jede Formleiste (11a,11b) nahe dem Ausblasstutzen (8) mit einem am Seitenteil (1a,1b) anlegba­ren Flansch (17) versehen ist, durch den die lösbare formschlüssige Verbindung (13) geführt ist.5. Housing according to claim 4, characterized in that each molding (11a, 11b) near the blow-out nozzle (8) with a on the side part (1a, 1b) flange (17) is provided, through which the releasable positive connection (13) is led. 6. Gehäuse nach einem der vorhergehenden Ansprüche, da­durch gekennzeichnet, daß jede Formleiste (11a,11b) nahe dem Ausblasstutzen (8) ohne den radial nach außen gerichteten Flansch (11a,11b) und ohne die äußere Wange des achsparallelen Flansches (13) ausgebildet ist.6. Housing according to one of the preceding claims, characterized in that each molding (11a, 11b) near the blow-out nozzle (8) without the radially outwardly directed flange (11a, 11b) and without the outer cheek of the axially parallel flange (13) is. 7. Gehäuse nach einem der vorhergehenden Ansprüche, da­durch gekennzeichnet, daß die Formleisten (11a,11b) im Spritzgußverfahren hergestellt sind.7. Housing according to one of the preceding claims, characterized in that the moldings (11a, 11b) are made by injection molding. 8. Gehäuse nach einem der vorhergehenden Ansprüche, da­durch gekennzeichnet, daß die Formleisten (11a,11b) aus Kunststoff, vorzugsweise glasfaserverstärktem Kunststoff, bestehen.8. Housing according to one of the preceding claims, characterized in that the moldings (11a, 11b) consist of plastic, preferably glass fiber reinforced plastic.
EP88103467A 1987-03-12 1988-03-05 Housing for a radial blower Expired - Lifetime EP0289735B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88103467T ATE72600T1 (en) 1987-03-12 1988-03-05 HOUSING FOR A RADIAL FAN.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873707920 DE3707920A1 (en) 1987-03-12 1987-03-12 RADIAL BLOWER HOUSING
DE3707920 1987-03-12

Publications (3)

Publication Number Publication Date
EP0289735A2 true EP0289735A2 (en) 1988-11-09
EP0289735A3 EP0289735A3 (en) 1989-08-16
EP0289735B1 EP0289735B1 (en) 1992-02-12

Family

ID=6322838

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88103467A Expired - Lifetime EP0289735B1 (en) 1987-03-12 1988-03-05 Housing for a radial blower

Country Status (3)

Country Link
EP (1) EP0289735B1 (en)
AT (1) ATE72600T1 (en)
DE (2) DE3707920A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0403007A1 (en) * 1989-06-13 1990-12-19 MARZORATI TECNICA INDUSTRIALE S.p.A. Volute for motor-driven fans
EP1388669A1 (en) * 2002-08-01 2004-02-11 GEBHARDT VENTILATOREN GMBH &amp; CO. Fan casing and method of production thereof

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104912825A (en) * 2015-04-30 2015-09-16 浙江双双制冷设备有限公司 Centrifugal fan
CN111322274B (en) * 2020-03-27 2020-12-11 珠海格力电器股份有限公司 Volute and air duct machine
WO2022061572A1 (en) * 2020-09-23 2022-03-31 南京中弘华飞信息科技有限公司 Fan volute having impact resistance

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Publication number Priority date Publication date Assignee Title
US3653116A (en) * 1970-09-25 1972-04-04 Ilg Ind Inc Method and apparatus for forming centrifugal fan housings
FR2105109A7 (en) * 1970-09-28 1972-04-28 Torin Corp
SU1067248A1 (en) * 1982-09-02 1984-01-15 Предприятие П/Я А-7075 Method of manufacturing volute casing for fan

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3653116A (en) * 1970-09-25 1972-04-04 Ilg Ind Inc Method and apparatus for forming centrifugal fan housings
FR2105109A7 (en) * 1970-09-28 1972-04-28 Torin Corp
SU1067248A1 (en) * 1982-09-02 1984-01-15 Предприятие П/Я А-7075 Method of manufacturing volute casing for fan

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Title
SOVIET INVENTIONS ILLUSTRATED, Sektion P/Q, Woche 8438, 31. Oktober 1984, Derwent Publications Ltd, London, GB; & SU-A-1 067 248 (MAZETS E P) 15-01-1984 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0403007A1 (en) * 1989-06-13 1990-12-19 MARZORATI TECNICA INDUSTRIALE S.p.A. Volute for motor-driven fans
EP1388669A1 (en) * 2002-08-01 2004-02-11 GEBHARDT VENTILATOREN GMBH &amp; CO. Fan casing and method of production thereof

Also Published As

Publication number Publication date
DE3868347D1 (en) 1992-03-26
ATE72600T1 (en) 1992-02-15
EP0289735B1 (en) 1992-02-12
DE3707920A1 (en) 1988-09-22
EP0289735A3 (en) 1989-08-16

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