EP0389565A1 - Radial fan. - Google Patents

Radial fan.

Info

Publication number
EP0389565A1
EP0389565A1 EP89901532A EP89901532A EP0389565A1 EP 0389565 A1 EP0389565 A1 EP 0389565A1 EP 89901532 A EP89901532 A EP 89901532A EP 89901532 A EP89901532 A EP 89901532A EP 0389565 A1 EP0389565 A1 EP 0389565A1
Authority
EP
European Patent Office
Prior art keywords
blades
blade ring
radial fan
fan
deviates
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
EP89901532A
Other languages
German (de)
French (fr)
Other versions
EP0389565B1 (en
Inventor
Trudpert Meier
Juergen Fritz
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6347105&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0389565(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0389565A1 publication Critical patent/EP0389565A1/en
Application granted granted Critical
Publication of EP0389565B1 publication Critical patent/EP0389565B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis
    • F04D29/283—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis rotors of the squirrel-cage type

Definitions

  • the invention is based on a radial fan according to the preamble of the main claim.
  • a radial fan is already known (DE-OS 19 57 988), in which the blades of the two blade rings are of the same design. Due to one-sided suction or running-in problems caused by unavoidable conditions such as B. Arrangement of a drive motor in the area of a suction opening, may result in different delivery pressures of different sizes
  • Volume flow pulsation is an operation of the fan in this
  • the radial fan according to the invention with the characterizing features of the main claim has the advantage that the strength of the fan sides can be balanced so that their zero delivery pressure ⁇ P o are at least approximately the same.
  • This adjustment of the two Fan sides to one another can be achieved, for example, in that on one blade ring the number of blades and / or the profile of the blades and / or the length of the blades deviate from the corresponding features of the blades of the other blade ring.
  • FIG. 1 shows a longitudinal section through a double-flow radial fan
  • FIG. 2 shows a partial section through the radial fan according to FIG. 1, along the line II-II in an enlarged view
  • FIG. 3 shows a partial section according to FIG. 2, along the line III-III.
  • a radial fan shown in FIG. 1 has a housing 10 with a receiving tube 12 for an electric drive motor 14, the end of its armature shaft 16 protruding from the motor projects into the housing 10 and carries a drum-like fan wheel 18.
  • the fan wheel 18 has a hub 20 held on the armature shaft 16, which extends in a bell shape over the one end shield 22 of the electric motor 14 and then merges into a partition wall 24 which runs radially to the armature shaft 16.
  • a plurality of fan blades 26 and 28 are attached to both sides of the partition wall, each of which forms a blade ring 30 and 32, respectively. The result is a so-called double-flow radial fan, which includes the housing 10 in addition to the fan wheel 18 described and the electric drive motor 14.
  • FIG. 1 also shows that an outer or end ring 34 or 36 is arranged to stabilize the fan wheel 18 or the blades 30 or 32 arranged on the partition. With its associated blade ring 30 or 32, each end ring surrounds the end region which faces away from the partition wall 24.
  • FIG. 1 further shows that the housing 10 — with respect to the axis of rotation of the armature shaft 16 of the electric motor 14 — has two suction openings 40 and 44 located opposite one another. It can be seen that the electric motor 14 is located in the suction opening 44 together with its receiving tube 12. Such an arrangement can, for example, be made a requirement by a customer because another solution, for example for reasons of space, cannot be implemented. However, the arrangement of the electric motor 14 in the intake opening 44 leads to break-in disturbances in this area.
  • the weaker fan side ie in the exemplary embodiment that with the blade ring 32, is “blown over” in the inlet opening 44.
  • the radial fan according to the invention takes this fact into account in that the blading of the one blade ring 30 deviates from the blading of the other blade ring 32. This can be done, for example, in that the number of blades 26 of one blade ring 30 deviates from the number of blades 28 of the other blade ring 32. Furthermore, also in connection with this measure, the profile of the blades 26 of the one blade ring 30 can deviate from the profile of the blades 28 of the other blade ring 32.
  • ⁇ P o of the two floods are at least approximately the same.

Landscapes

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

Abstract

Un ventilateur radial destiné à ventiler l'habitacle d'un véhicule à moteur comporte un rotor (18) monté sur un arbre entraîné (16), et pourvu d'au moins deux couronnes d'aubes (26, 28) agencées l'une derrière l'autre dans le sens axial de l'arbre (16). En vue d'assurer une concordance entre les pressions de refoulement nulles des flux résultants, l'aubage d'une couronne d'aubes (26 ou 28) diffère de l'aubage de l'autre couronne d'aubes (28 ou 26).A radial fan intended to ventilate the passenger compartment of a motor vehicle comprises a rotor (18) mounted on a driven shaft (16), and provided with at least two crowns of blades (26, 28) arranged one behind the other in the axial direction of the shaft (16). In order to ensure a concordance between the zero discharge pressures of the resulting flows, the blading of one blade crown (26 or 28) differs from the blasting of the other blade crown (28 or 26) .

Description

Radiallüfter Radial fan
Stand der TechnikState of the art
Die Erfindung geht aus von einem Radiallüfter nach der Gattung des Hauptanspruchs. Es ist schon ein Radiallüfter bekannt (DE-OS 19 57 988), bei dem die Beschaufelungen der beiden Schaufelkränze gleich ausgebildet sind. Aufgrund von einseitigen Ansaug- oder EinlaufStörungen, die durch unvermeidbare Auflagen, wie z. B. Anordnung eines Antriebmotors im Bereich der einen Ansaugöffnung, bedingt sein können, kommt es zu unterschiedlich großen Null-FörderdruckenThe invention is based on a radial fan according to the preamble of the main claim. A radial fan is already known (DE-OS 19 57 988), in which the blades of the two blade rings are of the same design. Due to one-sided suction or running-in problems caused by unavoidable conditions such as B. Arrangement of a drive motor in the area of a suction opening, may result in different delivery pressures of different sizes
( ΔPo) Beim Überschreiten des kleineren Null-Förderdruckwertes wird die schwächere Lüfterseite "überblasen", d. h., daß diese Seite entgegen der beabsichtigten Richtung durchströmt wird. Bereits kleine Druckschwankungen führen zu einem instabilen Gebläsebetrieb, dem sogenannten Pumpen. Aufgrund der dabei entstehenden Druck- und(ΔP o ) If the smaller zero delivery pressure value is exceeded, the weaker fan side is "blown over", ie this side is flowed through against the intended direction. Even small pressure fluctuations lead to unstable fan operation, the so-called pumping. Due to the resulting pressure and
Volumenstrompulsationen ist ein Betrieb des Gebläses in diesemVolume flow pulsation is an operation of the fan in this
Bereich nicht mehr möglich.Area no longer possible.
Vorteile der ErfindungAdvantages of the invention
Der erfindungsgemäße Radiallüfter mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß die Stärke der Lüfterseiten ausgewogen werden kann, so daß deren Null-Fördercrucke ΔPo zumindest annähernd gleich sind. Diese Anpassung der beiden Lüfterseiten aneinander kann beispielsweise dadurch erreicht werden, daß an dem einen Schaufelkranz die Anzahl der Schaufeln und/oder das Profil der Schaufeln und/oder die Länge der Schaufeln von den entsprechenden Merkmalen der Schaufeln des anderen Schaufelkranzes abweichen.The radial fan according to the invention with the characterizing features of the main claim has the advantage that the strength of the fan sides can be balanced so that their zero delivery pressure ΔP o are at least approximately the same. This adjustment of the two Fan sides to one another can be achieved, for example, in that on one blade ring the number of blades and / or the profile of the blades and / or the length of the blades deviate from the corresponding features of the blades of the other blade ring.
Zeichnungdrawing
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 einen Längsschnitt durch einen zweiflutigen Radiallüfter, Figur 2 einen Teilschnitt durch den Radiallüfter gemäß 1, entlang der Linie II-II in vergrößerter Darstellung und Figur 3 einen Teilschnitt gemäß Figur 2, entlang der Linie III-III.An embodiment of the invention is shown in the drawing and explained in more detail in the following description. 1 shows a longitudinal section through a double-flow radial fan, FIG. 2 shows a partial section through the radial fan according to FIG. 1, along the line II-II in an enlarged view, and FIG. 3 shows a partial section according to FIG. 2, along the line III-III.
Beschreibung des AusführungsbeispielsDescription of the embodiment
Ein in Figur 1 dargestellter Radiallüfter weist ein Gehäuse 10 mit einem Aufnahmerohr 12 für einen elektrischen Antriebsmotor 14 auf, dessen aus dem Motor ragende Ende seiner Ankerwelle 16 in das Gehäuse 10 hineinragt und ein trommelartiges Lüfterrad 18 trägt. Das Lüfterrad 18 hat eine auf der Ankerwelle 16 gehaltene Nabe 20, welche sich glockenförmig über den einen Lagerschild 22 des Elektromotors 14 erstreckt und dann in eine zur Ankerwelle 16 radial verlaufende Trennwand 24 übergeht. An beiden Seiten der Trennwand sind je eine Vielzahl von Lüfterschaufeln 26 bzw. 28 befestigt, welche jeweils einen Schaufelkranz 30 bzw. 32 bilden. Es ergibt sich somit ein sogenannnter zweiflutiger Radiallüfter, zu dem neben dem beschriebenen Lüfterrad 18 und dem elektrischen Antriebsmotor 14 das Gehäuse 10 gehören. Schließlich zeigt die Figur 1 noch, daß zur Stabilisierung des Lüfterrades 18 bzw. der an der Trennwand angeordneten Beschaufelungen 30 bzw. 32 noch jeweils ein Außen- oder Endring 34 bzw. 36 angeordnet ist. Jeder Endring umschließt bei seinem ihm zugeordneter Schaufelkranz 30 bzw. 32 den Endbereich, welcher von der Trennwand 24 abgewandt ist. Weiter zeigt Figur 1, daß das Gehäuse 10 - bezogen auf die Drehachse der Ankerwelle 16 des Elektromotors 14 - zwei einander gegenüberliegende Ansaugöffnung 40 bzw. 44 aufweist. Dabei ist erkennbar, daß sich der Elektromotor 14 zusammen mit seinem Aufnahmerohr 12 in der Ansaugöffnung 44 befindet. Eine derartige Anordnung kann beispielsweise von einem Kunden zur Auflage gemacht werden, weil eine andere Lösung beispielsweise aus Raumgründen nicht realisierbar ist. Die Anordnung des Elektromotors 14 in der Ansaugöffnung 44 führt aber in diesem Bereich zu EinlaufStörungen. Dies führt naturgemäß zu unterschiedlichen Null-Förderdrucken, so daß beim Überschreiten des kleineren Null-Förderdruckwertes die schwächere Lüfterseite, also beim Ausführungsbeispiel die mit dem Schaufelkranz 32, in der Einlauföffnung 44 "überblasen" wird. Diesem Sachverhalt trägt der erfindungsgemäße Radiallüfter Rechnung indem die Beschaufelung des einen Schaufelkranzes 30 von der Beschaufelung des anderen Schaufelkranzes 32 abweicht. Dies kann beispielsweise dadurch geschehen, daß die Anzahl der Schaufeln 26 des einen Schaufelkranzes 30 von der Anzahl der Schaufeln 28 des anderen Schaufelkranzes 32 abweicht. Weiter kann,auch in Verbindung mit dieser Maßnahme,das Profil der Schaufeln 26 des einen Schaufelkranzes 30 von dem Profil der Schaufeln 28 des anderen Schaufelkranzes 32 abweichen. Diese Maßnahme ist aus den Figuren 2 und 3 ersichtlich. Schließlich ist es noch denkbar, daß in Richtung der Drehachse des Lüfterrades 18 gesehen die Länge 48 der Schaufeln 26 des einen Schaufelkranzes 30 von der Länge 50 der Schaufeln 28 des anderen Schaufelkranzes 32 abweicht.A radial fan shown in FIG. 1 has a housing 10 with a receiving tube 12 for an electric drive motor 14, the end of its armature shaft 16 protruding from the motor projects into the housing 10 and carries a drum-like fan wheel 18. The fan wheel 18 has a hub 20 held on the armature shaft 16, which extends in a bell shape over the one end shield 22 of the electric motor 14 and then merges into a partition wall 24 which runs radially to the armature shaft 16. A plurality of fan blades 26 and 28 are attached to both sides of the partition wall, each of which forms a blade ring 30 and 32, respectively. The result is a so-called double-flow radial fan, which includes the housing 10 in addition to the fan wheel 18 described and the electric drive motor 14. Finally, FIG. 1 also shows that an outer or end ring 34 or 36 is arranged to stabilize the fan wheel 18 or the blades 30 or 32 arranged on the partition. With its associated blade ring 30 or 32, each end ring surrounds the end region which faces away from the partition wall 24. FIG. 1 further shows that the housing 10 — with respect to the axis of rotation of the armature shaft 16 of the electric motor 14 — has two suction openings 40 and 44 located opposite one another. It can be seen that the electric motor 14 is located in the suction opening 44 together with its receiving tube 12. Such an arrangement can, for example, be made a requirement by a customer because another solution, for example for reasons of space, cannot be implemented. However, the arrangement of the electric motor 14 in the intake opening 44 leads to break-in disturbances in this area. This naturally leads to different zero delivery pressures, so that when the smaller zero delivery pressure value is exceeded, the weaker fan side, ie in the exemplary embodiment that with the blade ring 32, is “blown over” in the inlet opening 44. The radial fan according to the invention takes this fact into account in that the blading of the one blade ring 30 deviates from the blading of the other blade ring 32. This can be done, for example, in that the number of blades 26 of one blade ring 30 deviates from the number of blades 28 of the other blade ring 32. Furthermore, also in connection with this measure, the profile of the blades 26 of the one blade ring 30 can deviate from the profile of the blades 28 of the other blade ring 32. This measure can be seen from FIGS. 2 and 3. Finally, it is also conceivable that the length 48 of the blades 26 of the one blade ring 30 deviates from the length 50 of the blades 28 of the other blade ring 32 when viewed in the direction of the axis of rotation of the fan wheel 18.
Es ist sicher einleuchtend, daß sich die einzelnen Maßnahmen beliebig kombinieren lassen. Auf diese Weise läßt sich die Stärke der Lüfterseiten so aufeinander abstimmen, daß die Null-FörderdruckeIt is obvious that the individual measures can be combined in any way. In this way, the strength of the fan sides can be coordinated so that the zero delivery pressures
ΔPo der beiden Fluten zumindest annähernd gleich sind. ΔP o of the two floods are at least approximately the same.

Claims

Ansprüche Expectations
1. Radiallüfter mit einem auf einer angetriebenen Welle sitzenden, trommelartigen Lüfterrad, das in Achsrichtung der Welle gesehen wenigstens zwei hintereinander angeordnete, voneinander getrennte Schaufelkränze aufweist, dadurch gekennzeichnt, daß die Beschaufelung (26) des einen Schaufelkranzes (30) von der Beschaufelung (28) des anderen Schaufelkranzes (32) abweicht.1. A radial fan with a drum-like fan wheel seated on a driven shaft, which, viewed in the axial direction of the shaft, has at least two successively arranged, separate blade rings, characterized in that the blading (26) of the one blade ring (30) is separated from the blading (28 ) of the other blade ring (32) deviates.
2. Radiallüfter nach Anspruch 1, dadurch gekennzeichnet, daß die Anzahl der Schaufeln (26) des einen Schaufelkranzes (30) von der Anzahl der Schaufeln (28) des anderen Schaufelkranzes (32) abweicht.2. Radial fan according to claim 1, characterized in that the number of blades (26) of the one blade ring (30) deviates from the number of blades (28) of the other blade ring (32).
3. Radiallüfter nach einem der Ansprüche 1 oder 2, dadurch gekennzeichet, daß das Profil der Schaufeln (26) des einen Schaufelkranzes (30) von dem Profil der Schaufeln (28) des anderen Schaufelkranzes (32) abweicht.3. Radial fan according to one of claims 1 or 2, characterized in that the profile of the blades (26) of one blade ring (30) deviates from the profile of the blades (28) of the other blade ring (32).
4. Radiallüfter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß in Richtung der Drehachse des Lüfterrades (18) gesehen die Länge (48) der Schaufeln (26) des einen Schaufelkranzes (30) von der Länge (50) der Schaufeln (28) des anderen Schaufelkranzes (32) abweicht. 4. Radial fan according to one of claims 1 to 3, characterized in that seen in the direction of the axis of rotation of the fan wheel (18), the length (48) of the blades (26) of a blade ring (30) of the length (50) of the blades ( 28) of the other blade ring (32) deviates.
EP19890901532 1988-02-11 1989-01-30 Radial fan Expired - Lifetime EP0389565B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3804113 1988-02-11
DE3804113A DE3804113A1 (en) 1988-02-11 1988-02-11 RADIAL FAN

Publications (2)

Publication Number Publication Date
EP0389565A1 true EP0389565A1 (en) 1990-10-03
EP0389565B1 EP0389565B1 (en) 1992-01-08

Family

ID=6347105

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890901532 Expired - Lifetime EP0389565B1 (en) 1988-02-11 1989-01-30 Radial fan

Country Status (4)

Country Link
EP (1) EP0389565B1 (en)
JP (1) JPH03502478A (en)
DE (2) DE3804113A1 (en)
WO (1) WO1989007716A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5814908A (en) * 1996-04-30 1998-09-29 Siemens Electric Limited Blower wheel with axial inlet for ventilation
ITAN20010008U1 (en) * 2001-03-01 2002-09-01 Giacalone Ignazio AIR CONVEYOR FOR HOUSEHOLD APPLIANCES ELECTRIC COOKER HOOD
DE102006014682B4 (en) * 2006-03-28 2017-02-02 DüRR DENTAL AG suction machine
JPWO2020090005A1 (en) * 2018-10-30 2021-09-02 三菱電機株式会社 Turbofan, blower, air conditioner and refrigeration cycle device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1957988C3 (en) * 1969-11-18 1974-05-02 Wilhelm 8090 Wasserburg Gronbach Radial fan wheel for blower
FR2296780A1 (en) * 1975-01-02 1976-07-30 Drouard Moteurs Rotor for centrifugal fan - is rolled into shape after pressing blades in flat metal plate
US4502837A (en) * 1982-09-30 1985-03-05 General Electric Company Multi stage centrifugal impeller

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8907716A1 *

Also Published As

Publication number Publication date
DE3804113A1 (en) 1989-08-24
WO1989007716A1 (en) 1989-08-24
DE58900704D1 (en) 1992-02-20
JPH03502478A (en) 1991-06-06
EP0389565B1 (en) 1992-01-08

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