EP0143791A1 - Radial blower. - Google Patents

Radial blower.

Info

Publication number
EP0143791A1
EP0143791A1 EP84901061A EP84901061A EP0143791A1 EP 0143791 A1 EP0143791 A1 EP 0143791A1 EP 84901061 A EP84901061 A EP 84901061A EP 84901061 A EP84901061 A EP 84901061A EP 0143791 A1 EP0143791 A1 EP 0143791A1
Authority
EP
European Patent Office
Prior art keywords
fan according
radial fan
spiral
curvature
outlet
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
EP84901061A
Other languages
German (de)
French (fr)
Other versions
EP0143791B1 (en
Inventor
Jurgen Schilling
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.)
Vaillant BV
Original Assignee
Joh Vaillant GmbH and Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Joh Vaillant GmbH and Co filed Critical Joh Vaillant GmbH and Co
Priority to AT84901061T priority Critical patent/ATE33876T1/en
Publication of EP0143791A1 publication Critical patent/EP0143791A1/en
Application granted granted Critical
Publication of EP0143791B1 publication Critical patent/EP0143791B1/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—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
    • 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
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps

Definitions

  • the drawing shows the housing of a radial fan with the housing cover removed.
  • the housing 1 consists of a sheet metal part which has a base 2 and a removed cover 3, both of which are connected to one another via a side wall 4.
  • the side wall 4 forms a spiral 5 which extends from a start 6 to an end 7, the spiral increasing in its outer diameter from the beginning to the end.
  • the beginning and end of the spiral are connected to one another via an outlet connection 8 which forms a rectangle in its cross section.
  • a fan wheel 11 is arranged within the interior 9 of the spiral 5, the central axis of which is designated 10, the central axis of which is also the axis 10.
  • an inlet opening is provided which is circular and whose central axis is at a distance from the axis 10.
  • a nose 12 is arranged, which merges into a side wall 14 of the outlet connector 8 via a curve 13.
  • the other opposite wall 15 of the outlet nozzle connects directly to the end of the spiral.
  • the two walls 14 and 15 diverge in the direction of the outlet 16, so that the narrowest point lies at the beginning of the outlet.
  • the interior 17 of the outlet connector 8 thus represents the geometric figure of a wedge, since only two walls diverge, but the bottom and top walls do not.
  • the curvature 13 has a radius of approximately 10 mm, which has an upper limit of 20 mm and a lower limit of 5 mm. These sizes refer to a nominal fan diameter of approximately 133 mm.
  • the curvature 10 is directed so that it is concave to the interior 17.
  • the curvature extends over a central angle of 10 to 50 °, in particular 30 °.
  • the present invention relates to a radial fan according to the preamble of the main claim.
  • the characteristic curve means the dependence of the pressure of the medium being conveyed on its throughput.
  • the present invention is therefore based on the object of developing a radial fan which has a steeper characteristic curve, that is to say that the associated change in throughput is as small as possible with a specific pressure change in the medium being conveyed.
  • the resulting technical progress is that at the same time as the characteristic curve increases, the fluctuation range of the pressure decreases with respect to certain throughput values.
  • Curvatures of the curvature and the nose behave approximately as 4: 1, which means that the curvature of the nose pointing into the interior 17 or 9 is rounded with approximately 2.5 mm.
  • outlet nozzle 15 of the outlet nozzle diverge is between 5 and 20 ° and is preferably chosen with 10 °.
  • the diverging sides are symmetrical about a central plane 18 of the outlet connection.
  • the housing 1 of the blower is preferably made of sheet metal. It is particularly expedient to structurally combine this radial fan, which is distinguished by a particularly good characteristic curve, with a burner to form a fan burner.

Landscapes

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

Abstract

Soufflante radiale avec un boîtier en forme de spirale, possédant une entrée et une sortie, l'entrée étant disposée latéralement par rapport au boîtier et son axe médian étant déplacé vis-à-vis de l'axe de la spirale, la sortie reliant le début de la spirale à la fin de la spirale et formant une tubulure, cette tubulure (18), conformément à la présente invention, s'accroissant dans la direction de l'écoulement de sortie (16).Radial blower with a spiral-shaped housing, having an inlet and an outlet, the inlet being arranged laterally with respect to the housing and its median axis being displaced opposite the axis of the spiral, the outlet connecting the beginning of the spiral at the end of the spiral and forming a tube, this tube (18), in accordance with the present invention, increasing in the direction of the outlet flow (16).

Description

Die Zeichnung zeigt das Gehäuse eines Radialgebläses mit abgenommenem Gehäusedeckel. Das Gehäuse 1 besteht aus einem Blechteil, das einen Boden 2 und einen abgenommenen Deckel 3 aufweist, die beide über eine Seitenwand 4 miteinander verbunden sind. Die Seitenwand 4 formt eine Spirale 5, die von einem Anfang 6 bis zu einem Ende 7 reicht, wobei die Spirale vom Anfang zum Ende hin in ihrem Außendurchmesser zunimmt. Anfang und Ende der Spirale sind über einen Auslaßstutzen 8 miteinander verbunden, der in seinem Querschnitt ein Rechteck bildet. Innerhalb des Innenraums 9 der Spirale 5, dessen Mittelachse mit 10 bezeichnet ist, ist ein Gebläserad 11 angeordnet, dessen Mittelachse gleichfalls die Achse 10 ist. The drawing shows the housing of a radial fan with the housing cover removed. The housing 1 consists of a sheet metal part which has a base 2 and a removed cover 3, both of which are connected to one another via a side wall 4. The side wall 4 forms a spiral 5 which extends from a start 6 to an end 7, the spiral increasing in its outer diameter from the beginning to the end. The beginning and end of the spiral are connected to one another via an outlet connection 8 which forms a rectangle in its cross section. A fan wheel 11 is arranged within the interior 9 of the spiral 5, the central axis of which is designated 10, the central axis of which is also the axis 10.
Im nicht dargestellten Deckel des Gehäuses 1 ist eine Einlaßöffnung vorgesehen, die kreisrund ist und deren Mittelachse im Abstand von der Achse 10 steht.In the cover of the housing 1, not shown, an inlet opening is provided which is circular and whose central axis is at a distance from the axis 10.
Am Anfang 6 der Spirale ist eine Nase 12 angeordnet, die über eine Krümmung 13 in die eine Seitenwand 14 des Auslaßstutzens 8 übergeht. Die andere gegenüberliegende Wand 15 des Auslaßstutzens schließt unmittelbar an das Ende der Spirale an. Die beiden Wände 14 und 15 divergieren in Richtung des Auslasses 16, so daß am Beginn des Auslasses der engste Punkt liegt. Der Innenraum 17 des Auslaßstutzens 8 stellt somit die geometrische Figur eines Keiles dar, da lediglich zwei Wände divergieren, die Boden- und Deckelwand jedoch nicht. Die Krümmung 13 weist einen Radius von etwa 10 mm auf, der eine obere Grenze von 20 mm und eine untere Grenze von 5 mm aufweist. Diese Größen beziehen sich auf einen Nenngebläsedurchmesser von etwa 133 mm. Die Krümmung 10 ist so gerichtet, daß sie konkav zum Innenraum 17 liegt. Die Krümmung erstreckt sich über einen Zentriwinkel von 10 bis 50°, insbesondere 30°. Die RadialgebläseAt the beginning 6 of the spiral, a nose 12 is arranged, which merges into a side wall 14 of the outlet connector 8 via a curve 13. The other opposite wall 15 of the outlet nozzle connects directly to the end of the spiral. The two walls 14 and 15 diverge in the direction of the outlet 16, so that the narrowest point lies at the beginning of the outlet. The interior 17 of the outlet connector 8 thus represents the geometric figure of a wedge, since only two walls diverge, but the bottom and top walls do not. The curvature 13 has a radius of approximately 10 mm, which has an upper limit of 20 mm and a lower limit of 5 mm. These sizes refer to a nominal fan diameter of approximately 133 mm. The curvature 10 is directed so that it is concave to the interior 17. The curvature extends over a central angle of 10 to 50 °, in particular 30 °. The Radial blower
Die vorliegende Erfindung bezieht sich auf ein Radialgebläse gemäß dem Oberbegriff des Hauptanspruchs.The present invention relates to a radial fan according to the preamble of the main claim.
Solche Radialgebläse sind in einer Vielzahl bekanntgeworden, sie weisen regelmäßig den Nachteil auf, daß sie eine relativ flache Kennlinie aufweisen. Hierbei wird unter Kennlinie die Abhängigkeit des Drucks des geförderten Mediums von seinem Durchsatz verstanden.A large number of such radial fans have become known, they regularly have the disadvantage that they have a relatively flat characteristic curve. Here, the characteristic curve means the dependence of the pressure of the medium being conveyed on its throughput.
Der vorliegenden Erfindung liegt daher die Aufgabe zu Grunde, ein Radialgebläse zu entwickeln, das eine steilere Kennlinie aufweist, das heißt also, daß bei einer bestimmten Druckänderung im geförderten Medium die zugehörige Durchsatzänderung möglichst klein ist.The present invention is therefore based on the object of developing a radial fan which has a steeper characteristic curve, that is to say that the associated change in throughput is as small as possible with a specific pressure change in the medium being conveyed.
Zur Lösung dieser Aufgabe werden die aus dem kennzeichnenden Teil des Hauptanspruchs hervorgehenden Merkmale vorgeschlagen.To solve this problem, the features emerging from the characterizing part of the main claim are proposed.
Der sich hieraus ergebende technische Fortschritt liegt darin, daß zugleich mit der Kennlinienversteigerung auch die Schwankungsbrei te des Drucks in bezug auf bestimmte Durchsatzwerte abnimmt.The resulting technical progress is that at the same time as the characteristic curve increases, the fluctuation range of the pressure decreases with respect to certain throughput values.
Weitere Ausgestaltungen und besonders vorteilhafte Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche beziehungsweise gehen aus der nachfolgenden Beschreibung hervor, die ein Ausführungsbeispiel der Erfindung anhand der Figur der Zeichnung näher erläutert. Krümmungen der Krümmung und der Nase verhalten sich etwa wie 4:1, das bedeutet, daß die in den Innenraum 17 beziehungsweise 9 weisende Krümmung der Nase mit etwa 2,5 mm abgerundet ist.Further refinements and particularly advantageous developments of the invention are the subject of the subclaims or emerge from the following description which explains an exemplary embodiment of the invention with reference to the figure of the drawing. Curvatures of the curvature and the nose behave approximately as 4: 1, which means that the curvature of the nose pointing into the interior 17 or 9 is rounded with approximately 2.5 mm.
Aus der Zeichnung ist ersichtlich, daß die beiden SeitenFrom the drawing it can be seen that the two sides
14 und 15 des Auslaßstutzens 8, die divergierend zueinander stehen, in der Ebene der Spirale liegen. Die eine Seite 14 des Gebläsestutzens 8 ist über die Nase 12 mit dem Anfang 6 der Spirale 4 verbunden. Die Krümmung ist hierbei zwischen die Stutzenwand 14 und die Nase 12 gelegt.14 and 15 of the outlet nozzle 8, which are diverging from one another, lie in the plane of the spiral. One side 14 of the blower connector 8 is connected via the nose 12 to the beginning 6 of the spiral 4. The curvature is placed between the nozzle wall 14 and the nose 12.
Der Winkel des Keiles, unter dem die beiden Seiten 14 undThe angle of the wedge at which the two sides 14 and
15 des Auslaßstutzens divergieren, liegt zwischen 5 und 20° und wird bevorzugt mit 10° gewählt. Die divergierenden Seiten liegen symmetrisch zu einer Mittelebene 18 des Auslaßstutzens.15 of the outlet nozzle diverge, is between 5 and 20 ° and is preferably chosen with 10 °. The diverging sides are symmetrical about a central plane 18 of the outlet connection.
Das Gehäuse 1 des Gebläses ist bevorzugt aus Blech gestaltet. Es ist besonders zweckmäßig, dieses Radialgebläse, das sich durch eine besonders gute Kennlinie auszeichnet, baulich mit einem Brenner zu einem Gebläsebrenner zu vereinigen. The housing 1 of the blower is preferably made of sheet metal. It is particularly expedient to structurally combine this radial fan, which is distinguished by a particularly good characteristic curve, with a burner to form a fan burner.

Claims

Ansprüch e Expectations
1. Radialgebläse mit einem eine Spirale bildenden Gehäuse, das einen Einlaß und einen Auslaß aufweist, wobei der Einlaß seitlich am Gehäuse angeordnet und mit seiner Mittelachse gegenüber der Spiralachse versetzt ist und der Auslaß den Spiralanfang mit dem Spiralende verbindet und einen Stutzen bildet, dadurch gekennzeichnet, daß der Stutzen (8) in Ausströmrichtung (16) vergrößernd ausgebildet ist.1. Radial blower with a housing forming a spiral, which has an inlet and an outlet, the inlet being arranged on the side of the housing and offset with its central axis with respect to the spiral axis and the outlet connecting the beginning of the spiral to the end of the spiral and forming a connection piece, characterized that the nozzle (8) is designed to enlarge in the outflow direction (16).
2. Radialgebläse nach Anspruch eins, dadurch gekennzeichnet, daß die Vergrößerung in der Ebene der Spirale (5) angeordnet ist.2. Radial fan according to claim one, characterized in that the enlargement is arranged in the plane of the spiral (5).
3. Radialgebläse nach Anspruch eins oder zwei, dadurch gekennzeichnet, daß der Auslaßstutzen (8) keilförmig ausgebildet ist.3. Radial fan according to claim one or two, characterized in that the outlet nozzle (8) is wedge-shaped.
4. Radialgebläse nach einem der Ansprüche eins bis drei, dadurch gekennzeichnet, daß der Gebläsestutzen mit dem Anfang (6) der Spirale (5) über eine Nase (12) verbunden ist.4. Radial fan according to one of claims one to three, characterized in that the blower nozzle with the beginning (6) of the spiral (5) is connected via a nose (12).
5. Radialgebläse nach Anspruch vier, dadurch gekennzeichnet, daß die Nase (12) mit der einen divergierenden Wandung (14) des Auslaßstutzens (8) über eine Krümmung (13) verbunden ist.5. Radial fan according to claim four, characterized in that the nose (12) with the one diverging wall (14) of the outlet connector (8) is connected via a curvature (13).
6. Radialgebläse nach Anspruch vier oder fünf, dadurch gekennzeichnet, daß die Krümmung konkav in den Innenraum (17) des Auslaßstutzens (8) ge ri chtet i st .6. Radial fan according to claim four or five, characterized in that the curvature concave in the interior (17) of the outlet connector (8) ge ri rht i st.
7. Radialgebläse nach Anspruch drei, dadurch gekennzeichnet, daß der Keilwinkel zwischen 5 und 20° liegt.7. Radial fan according to claim three, characterized in that the wedge angle is between 5 and 20 °.
8. Radialgebläse nach Anspruch sieben, dadurch gekennzeichnet, daß der Keilwinkel 10° beträgt.8. Radial fan according to claim seven, characterized in that the wedge angle is 10 °.
9. Radialgebläse nach Anspruch drei, sieben oder acht, dadurch gekennzeichnet, daß der Keil symmetrisch zur Mittelebene (18) des Auslaßstutzens (8) angeordnet ist.9. Radial fan according to claim three, seven or eight, characterized in that the wedge is arranged symmetrically to the central plane (18) of the outlet nozzle (8).
10. Radialgebläse nach Anspruch fünf oder sechs, dadurch gekennzeichnet, daß die Krümmung mit einem Ra.dius von 5 bis 20 mm versehen ist.10. Radial fan according to claim five or six, characterized in that the curvature is provided with a radius of 5 to 20 mm.
11 Radialgebläse nach Anspruch zehn, dadurch gekennzeichnet, daß die Krümmung mit einem Radius von 10 mm versehen ist.11 radial fan according to claim ten, characterized in that the curvature is provided with a radius of 10 mm.
12. Radialgebläse nach Anspruch vier oder elf, dadurch gekennzeichnet, daß sich das Verhältnis der Krümmungen der Krümmung (13) und der Nase (12) wie 4:1 verhalten.12. Radial fan according to claim four or eleven, characterized in that the ratio of the curvatures of the curvature (13) and the nose (12) behave as 4: 1.
13. Radialgebläse nach Anspruch zehn oder elf, dadurch gekennzeichnet, daß der Zentriwinkel der Krümmung von 10 bis 50° reicht.13. Radial fan according to claim ten or eleven, characterized in that the central angle of the curvature ranges from 10 to 50 °.
14. Radialgebläse nach Anspruch dreizehn, dadurch gekennzeichnet, daß der Zentriwinkel 30° beträgt. 14. Radial fan according to claim thirteen, characterized in that the central angle is 30 °.
15. Radialgebläse nach einem der Ansprüche eins bis vierzehn, gekennzeichnet durch die bauliche Vereinigung mit einem ζflbrenner zu einem Gebläsebrenner. 15. Radial fan according to one of claims one to fourteen, characterized by the structural union with a ζflbrenner to a fan burner.
EP84901061A 1983-03-19 1984-03-09 Radial blower Expired EP0143791B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84901061T ATE33876T1 (en) 1983-03-19 1984-03-09 RADIAL FAN.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8308535U 1983-03-19
DE19838308535U DE8308535U1 (en) 1983-03-19 1983-03-19 RADIAL BLOWER

Publications (2)

Publication Number Publication Date
EP0143791A1 true EP0143791A1 (en) 1985-06-12
EP0143791B1 EP0143791B1 (en) 1988-04-27

Family

ID=6751483

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84901061A Expired EP0143791B1 (en) 1983-03-19 1984-03-09 Radial blower

Country Status (4)

Country Link
US (1) US4735551A (en)
EP (1) EP0143791B1 (en)
DE (2) DE8308535U1 (en)
WO (1) WO1984003740A1 (en)

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US5943878A (en) * 1998-05-22 1999-08-31 American Standard Inc. Tangential fan scroll and discharged diffuser design
KR100337287B1 (en) * 1999-07-28 2002-05-17 윤종용 centrifugal fan
KR100637337B1 (en) * 2005-01-25 2006-10-20 선문대학교 산학협력단 scroll casing for centrifugal blower
DE102009033776A1 (en) * 2009-07-17 2011-01-20 Behr Gmbh & Co. Kg Radial fan housing
DE102009050684A1 (en) * 2009-10-26 2011-04-28 Ebm-Papst Landshut Gmbh centrifugal blower
BE1022028B1 (en) * 2013-04-05 2016-02-04 Atlas Copco Airpower, Naamloze Vennootschap HOUSING FOR A FAN OF A SPIRAL COMPRESSOR
JP6763815B2 (en) * 2017-03-31 2020-09-30 三菱重工コンプレッサ株式会社 Centrifugal compressor and turbo chiller
CN108626148B (en) * 2018-04-10 2020-10-30 广东美的暖通设备有限公司 Fan and roof machine
US11480192B2 (en) 2019-01-04 2022-10-25 Johnson Controls Tyco IP Holdings LLP Cutoff for a blower housing

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Also Published As

Publication number Publication date
WO1984003740A1 (en) 1984-09-27
DE3470777D1 (en) 1988-06-01
DE8308535U1 (en) 1984-06-20
EP0143791B1 (en) 1988-04-27
US4735551A (en) 1988-04-05

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