EP0627561A1 - Radial blorier - Google Patents

Radial blorier Download PDF

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Publication number
EP0627561A1
EP0627561A1 EP94104635A EP94104635A EP0627561A1 EP 0627561 A1 EP0627561 A1 EP 0627561A1 EP 94104635 A EP94104635 A EP 94104635A EP 94104635 A EP94104635 A EP 94104635A EP 0627561 A1 EP0627561 A1 EP 0627561A1
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EP
European Patent Office
Prior art keywords
edge
housing
tongue
impeller
casing
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
EP94104635A
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German (de)
French (fr)
Other versions
EP0627561B1 (en
Inventor
Joseph Brandtner
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.)
Truma Geraetetechnik GmbH and Co KG
Original Assignee
Philipp Kreis & Co Truma-Geraetebau GmbH
KREIS TRUMA GERAETEBAU
Philipp Kreis & Co Truma-Geratebau GmbH
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Application filed by Philipp Kreis & Co Truma-Geraetebau GmbH, KREIS TRUMA GERAETEBAU, Philipp Kreis & Co Truma-Geratebau GmbH filed Critical Philipp Kreis & Co Truma-Geraetebau GmbH
Publication of EP0627561A1 publication Critical patent/EP0627561A1/en
Application granted granted Critical
Publication of EP0627561B1 publication Critical patent/EP0627561B1/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/66Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/40Casings; Connections of working fluid
    • F04D29/42Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/422Discharge tongues

Definitions

  • the invention relates to a radial fan according to the preamble of patent claim 1.
  • the object of the invention is to provide a radial fan which has a further reduced noise level with the same delivery rate.
  • this object is achieved by a radial fan solved with the features of claim 1.
  • the pressure surge formation is significantly reduced due to a kind of smooth transition between the housing tongue edge and the outer edge of a wing, which leads to a significantly reduced noise formation with the same distance between the tongue edge and the outer edge of the wing.
  • the housing tongue edge is preferably bent in the tongue plane in such a way that it has the smallest slope measured from the impeller plane where the greatest volume flow exits the impeller.
  • FIG. 1 and 2 show a radial fan with a spiral housing 1, which begins at a housing tongue 2 and in which a driven impeller 3 with blades 4 rotates.
  • the edge 5 of the housing tongue 2 is inclined and curved with respect to the outer edges 6 of the impeller blades 4 which are parallel to the axis here.
  • the inclination or the course of the tongue edge is chosen so that the tongue edge covers at least a distance between two successive impeller edges, preferably several such distances. In the case of the embodiment shown in FIG.
  • the housing tongue edge is curved in an S-shape, the inclination of the tongue edge with respect to the outer edge of the impeller in the region of the center plane of the impeller, which is the area with the largest volume flow, is largest and decreases at the edges, in the direction of the housing faces.
  • Fig. 3 shows a concave curved tongue edge 5, the inclination of the impeller axis or the outer edges of the impeller blades 4 decreases from the suction side.
  • FIG. 4 shows a convexly curved tongue edge 5 with an increasing inclination towards the outer edge of an impeller blade 4 starting from the suction side.
  • FIG. 5 shows a housing tongue edge 5 which, as in FIG. 2, is curved in an S-shape, but in contrast to FIG. 2 with the greatest inclination in relation to the outer edges 6 of the impeller blades 4 in the area of the housing end faces and the smallest inclination in the area of the impeller center plane.
  • FIGS. 6 to 9 show double radial fans with tongue edge structures which essentially result from a symmetrical addition of the shapes shown in FIGS. 2 to 5.

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

Abstract

Gegenstand der Erfindung ist ein Radialgebläse mit einem Spiralgehäuse 1, welches an einer den Mantel des Spiralgehäuses fortsetzenden Gehäusezunge 2 mit einer Kante 5 an ihrem freien Ende beginnt, die zusammen mit dem Endbereich der Mantels des Spiralgehäuses eine Austrittsöffnung des Gebläses bestimmt, einem in dem Spiralgehäuse aufgenommenen Laufrad 3, welches Flügel 4 aufweist, die mit ihren von der Laufradachse fernen Außenkanten 6 an der Gehäusezungenkante 5, vorbeistreichen, die gegenüber der Außenkante 6 der Flügel 4 geneigt ist und dabei mindestens einen Abstand zweier aufeinanderfolgender Außenkanten 6 überdeckt, wobei die Gehäusezungenkante 5 gekrümmt ist.

Figure imgaf001
The invention relates to a radial fan with a spiral housing 1, which begins on a housing tongue 2 which continues the jacket of the spiral housing with an edge 5 at its free end which, together with the end region of the jacket of the spiral housing, defines an outlet opening of the fan, one in the spiral housing Recorded impeller 3, which has vanes 4 which, with their outer edges 6 remote from the impeller axis, sweep past the housing tongue edge 5, which is inclined with respect to the outer edge 6 of the vanes 4 and thereby covers at least a distance between two successive outer edges 6, the housing tongue edge 5 is curved.
Figure imgaf001

Description

Die Erfindung betrifft ein Radialgebläse gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a radial fan according to the preamble of patent claim 1.

Bei bekannten Radialgebläsen dieser Art (DE-PS 319 721) ist die geneigte Kante gerade. Dies führt beim Vorbeistreichen der Flügel an der Zungenkante zwar zu einer verminderten Geräuschentwicklung gegenüber dem Fall einer zur Außenkante des vorbeistreichenden Flügels parallelen Gehäusezungenkante. Das Ergebnis ist jedoch noch nicht völlig zufriedenstellend. Der Geräuschpegel läßt sich durch Abrücken der Gehäusezungenkante von der Laufradkante, also durch eine Vergrößerung des Gehäuseradiuses im Verhältnis zum Laufradradius vermindern, was aber wiederum der Förderleistung des Gebläses abträglich ist.In known radial fans of this type (DE-PS 319 721) the inclined edge is straight. When the wings pass the tongue edge, this leads to a reduced noise development compared to the case of a housing tongue edge parallel to the outer edge of the passing wing. However, the result is still not entirely satisfactory. The noise level can be reduced by moving the edge of the housing tongue away from the edge of the impeller, that is to say by increasing the radius of the housing in relation to the radius of the impeller, which in turn is detrimental to the delivery capacity of the fan.

Aufgabe der Erfindung ist die Schaffung eines Radialgebläses, das bei gleicher Förderleistung einen weiter verminderten Geräuschpegel aufweist.The object of the invention is to provide a radial fan which has a further reduced noise level with the same delivery rate.

Diese Aufgabe wird erfindungsgemäß durch ein Radialgebläse mit den Merkmalen des Patentanspruchs 1 gelöst.According to the invention, this object is achieved by a radial fan solved with the features of claim 1.

Durch die gekrümmte Ausbildung der geneigten Gehäusezungenkante ist wegen einer Art gleitenden Übergangs zwischen Gehäusezungenkante und Außenkante eines Flügels die Druckstoßausbildung deutlich gemindert, was bei gleichem Abstand zwischen Zungenkante und Flügelaußenkante zu einer deutlich geminderten Geräuschbildung führt.Due to the curved design of the inclined edge of the housing tongue, the pressure surge formation is significantly reduced due to a kind of smooth transition between the housing tongue edge and the outer edge of a wing, which leads to a significantly reduced noise formation with the same distance between the tongue edge and the outer edge of the wing.

Bevorzugt ist die Gehäusezungenkante in der Zungenebene so gebogen, daß sie die geringste Steigung gemessen von der Laufradebene aus dort hat, wo der größte Volumenstrom aus dem Laufrad austritt.The housing tongue edge is preferably bent in the tongue plane in such a way that it has the smallest slope measured from the impeller plane where the greatest volume flow exits the impeller.

Im folgenden werden bevorzugte Ausführungsformen anhand der beigefügten Zeichnung beschrieben. Auf dieser zeigt bzw. zeigen:

  • Fig. 1 ein Radialgebläse, schematisch von der Seite,
  • Fig. 2 das Gebläse der Fig. 1 im Schnitt längs der Linie II - II der Fig. 1,
  • Fig. 3 bis 5 demjenigen der Fig. 2 entsprechende Schnitte mit anders geformten Gehäusezungenkanten, und
  • Fig. 6 bis 9 Schnitte entsprechend demjenigen der Fig. 2 für Doppelradialgebläse.
Preferred embodiments are described below with reference to the accompanying drawing. This shows:
  • 1 is a radial fan, schematically from the side,
  • 2 shows the blower of FIG. 1 in section along the line II - II of FIG. 1,
  • 3 to 5 corresponding to that of FIG. 2 sections with differently shaped housing tongue edges, and
  • Fig. 6 to 9 sections corresponding to that of FIG. 2 for double radial fans.

Fig. 1 und 2 zeigen ein Radialgebläse mit einem spiralförmigen Gehäuse 1, das an einer Gehäusezunge 2 beginnt und in dem sich ein angetriebenes Laufrad 3 mit Flügeln 4 dreht. Die Kante 5 der Gehäusezunge 2 ist gegenüber den hier achsenparallelen Außenkanten 6 der Laufradflügel 4 geneigt und gekrümmt. Die Neigung bzw. der Verlauf der Zungenkante ist dabei so gewählt, daß die Zungenkante mindestens einen Abstand zweier aufeinanderfolgender Laufradkanten, vorzugsweise mehrere solche Abstände, überdeckt. Im Falle der in Fig. 2 gezeigten Ausführungsform ist die Gehäusezungenkante S-förmig geschwungen, wobei die Neigung der Zungenkante in Bezug auf die Laufradaußenkanten im Bereich der Laufradmittenebene, der hier der Bereich des größten Volumenstroms ist, am größten ist und an den Rändern, in Richtung der Gehäusestirnflächen, abnimmt. Fig. 3 zeigt eine konkav gekrümmte Zungenkante 5, deren Neigung gegenüber der Laufradachse bzw. den Außenkanten der Laufradflügel 4 von der Ansaugseite ausgehend abnimmt. Fig. 4 zeigt eine konvex gekrümmte Zungenkante 5 mit von der Ansaugseite ausgehend zunehmender Neigung gegenüber der Außenkante eines Laufradflügels 4. Fig. 5 zeigt eine Gehäusezungenkante 5, die wie in Fig. 2 S-förmig geschwungen ist, allerdings zum Unterschied von Fig. 2 mit der größten Neigung gegenüber den Außenkanten 6 der Laufradflügel 4 im Bereich der Gehäusestirnseiten und der kleinsten Neigung im Bereich der Laufradmittenebene.1 and 2 show a radial fan with a spiral housing 1, which begins at a housing tongue 2 and in which a driven impeller 3 with blades 4 rotates. The edge 5 of the housing tongue 2 is inclined and curved with respect to the outer edges 6 of the impeller blades 4 which are parallel to the axis here. The inclination or the course of the tongue edge is chosen so that the tongue edge covers at least a distance between two successive impeller edges, preferably several such distances. In the case of the embodiment shown in FIG. 2, the housing tongue edge is curved in an S-shape, the inclination of the tongue edge with respect to the outer edge of the impeller in the region of the center plane of the impeller, which is the area with the largest volume flow, is largest and decreases at the edges, in the direction of the housing faces. Fig. 3 shows a concave curved tongue edge 5, the inclination of the impeller axis or the outer edges of the impeller blades 4 decreases from the suction side. FIG. 4 shows a convexly curved tongue edge 5 with an increasing inclination towards the outer edge of an impeller blade 4 starting from the suction side. FIG. 5 shows a housing tongue edge 5 which, as in FIG. 2, is curved in an S-shape, but in contrast to FIG. 2 with the greatest inclination in relation to the outer edges 6 of the impeller blades 4 in the area of the housing end faces and the smallest inclination in the area of the impeller center plane.

Die Fig. 6 bis 9 zeigen Doppelradialgebläse mit Zungenkantenstrukturen, die sich im wesentlichen aus einer symmetrischen Ergänzung der in den Fig. 2 bis 5 dargestellten Formen ergeben.6 to 9 show double radial fans with tongue edge structures which essentially result from a symmetrical addition of the shapes shown in FIGS. 2 to 5.

Claims (2)

Radialgebläse mit einem Spiralgehäuse (1), welches an einer den Mantel des Spiralgehäuses fortsetzenden Gehäusezunge (2) mit einer Kante (5) an ihrem freien Ende beginnt, die zusammen mit dem Endbereich des Mantels des Spiralgehäuses eine Austrittsöffnung des Gebläses bestimmt, und einem in dem Spiralgehäuse aufgenommenen Laufrad (3), welches Flügel (4) aufweist, die mit ihren von der Laufradachse fernen Außenkanten (6) an der Gehäusezungenkante (5) vorbeistreichen, die gegenüber der Außenkante (6) der Flügel (4) geneigt ist und mindestens einen Abstand zweier aufeinanderfolgender Außenkanten (6) überdeckt, dadurch gekennzeichnet, daß die Gehäusezungenkante (5) gekrümmt ist.Radial blower with a volute casing (1), which begins on a casing tongue (2) which continues the casing of the volute casing with an edge (5) at its free end which, together with the end region of the casing of the volute casing, defines an outlet opening of the blower, and an in the impeller (3) accommodated in the volute casing, which has vanes (4) which, with their outer edges (6) remote from the impeller axis, sweep past the casing tongue edge (5), which is inclined with respect to the outer edge (6) of the vanes (4) and at least covers a distance between two successive outer edges (6), characterized in that the housing tongue edge (5) is curved. Radialgebläse nach Anspruch 1, dadurch gekennzeichnet, daß die Gehäusezungenkante (5) eine Krümmung mit einem Wendepunkt aufweist.Radial fan according to claim 1, characterized in that the housing tongue edge (5) has a curvature with an inflection point.
EP19940104635 1993-04-26 1994-03-23 Radial blorier Expired - Lifetime EP0627561B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19934313617 DE4313617C2 (en) 1993-04-26 1993-04-26 Radial fan
DE4313617 1993-04-26

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EP0627561A1 true EP0627561A1 (en) 1994-12-07
EP0627561B1 EP0627561B1 (en) 1998-06-10

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005111428A1 (en) 2004-04-29 2005-11-24 American Standard International Inc. Improved cutoff for fan or blower
CN110939607A (en) * 2018-09-25 2020-03-31 开利公司 Fan shell, fan and operation system provided with fan

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3482668B2 (en) * 1993-10-18 2003-12-22 株式会社日立製作所 Centrifugal fluid machine
JPH09510527A (en) * 1994-03-19 1997-10-21 カーエスベー・アクチエンゲゼルシャフト Noise reduction device for rotor pump
DE19861061C2 (en) * 1998-03-18 2003-07-03 Motoren Ventilatoren Gmbh radial fans
DE19811877C2 (en) * 1998-03-18 2001-09-13 Motoren Ventilatoren Gmbh Radial fan
DE29920373U1 (en) * 1999-11-19 2000-01-13 Motoren Ventilatoren Gmbh Housing for a fan, in particular a radial fan
FR2875560B1 (en) * 2004-09-23 2006-12-01 Renault Sas REDUCED NOISE CENTRIFUGAL FAN FOR A VENTILATION SYSTEM OF A MOTOR VEHICLE
US7597541B2 (en) * 2005-07-12 2009-10-06 Robert Bosch Llc Centrifugal fan assembly
DE102007055507A1 (en) 2007-11-21 2009-06-04 Georg Emanuel Koppenwallner Bevel lip spiral
DE102008051362A1 (en) 2008-10-15 2010-04-22 Behr Gmbh & Co. Kg Radial blower housing
CN101975197A (en) * 2010-07-28 2011-02-16 苏州顶裕节能设备有限公司 Fan noise reduction device
FR3056287B1 (en) * 2016-09-19 2019-05-10 Valeo Systemes Thermiques AIR INTAKE HOUSING AND HEATING, VENTILATION AND / OR AIR CONDITIONING INSTALLATION FOR A CORRESPONDING MOTOR VEHICLE
WO2023135783A1 (en) * 2022-01-17 2023-07-20 三菱電機株式会社 Centrifugal blower and air conditioning device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE319721C (en) * 1920-03-15 Ludwig Hartwagner Centrifugal fan with worm housing
CH278711A (en) * 1949-09-30 1951-10-31 Wegmann Ernst Fan with spiral casing.
DE1077368B (en) * 1957-11-21 1960-03-10 Westerasmaskiner Ab Centrifugal fan of large width relative to the impeller diameter
JPS54122415A (en) * 1978-03-15 1979-09-22 Matsushita Electric Ind Co Ltd Blower
DE8808417U1 (en) * 1988-06-30 1989-10-26 Siemens AG, 1000 Berlin und 8000 München Spiral blower

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE319721C (en) * 1920-03-15 Ludwig Hartwagner Centrifugal fan with worm housing
CH278711A (en) * 1949-09-30 1951-10-31 Wegmann Ernst Fan with spiral casing.
DE1077368B (en) * 1957-11-21 1960-03-10 Westerasmaskiner Ab Centrifugal fan of large width relative to the impeller diameter
JPS54122415A (en) * 1978-03-15 1979-09-22 Matsushita Electric Ind Co Ltd Blower
DE8808417U1 (en) * 1988-06-30 1989-10-26 Siemens AG, 1000 Berlin und 8000 München Spiral blower

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 3, no. 148 (M - 083) 7 December 1979 (1979-12-07) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005111428A1 (en) 2004-04-29 2005-11-24 American Standard International Inc. Improved cutoff for fan or blower
CN101105186B (en) * 2004-04-29 2010-11-03 特灵国际有限公司 Improved cutoff for fan or blower
CN1788167B (en) * 2004-04-29 2012-05-23 特灵国际有限公司 Improved cutoff and fan or blower provided with the cutoff
CN110939607A (en) * 2018-09-25 2020-03-31 开利公司 Fan shell, fan and operation system provided with fan

Also Published As

Publication number Publication date
DE4313617C2 (en) 1996-04-25
EP0627561B1 (en) 1998-06-10
DE4313617C1 (en) 1994-05-11

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