EP0561864A1 - Radial ventilator - Google Patents

Radial ventilator

Info

Publication number
EP0561864A1
EP0561864A1 EP92900338A EP92900338A EP0561864A1 EP 0561864 A1 EP0561864 A1 EP 0561864A1 EP 92900338 A EP92900338 A EP 92900338A EP 92900338 A EP92900338 A EP 92900338A EP 0561864 A1 EP0561864 A1 EP 0561864A1
Authority
EP
European Patent Office
Prior art keywords
air flow
electric motor
fan blades
radial
axial fan
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
EP92900338A
Other languages
German (de)
French (fr)
Other versions
EP0561864B1 (en
Inventor
Wolfgang P. Weinhold
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.)
WEINHOLD, WOLFGANG P.
Siemens AG
Original Assignee
Siemens AG
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
Priority claimed from DE9016808U external-priority patent/DE9016808U1/en
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0561864A1 publication Critical patent/EP0561864A1/en
Application granted granted Critical
Publication of EP0561864B1 publication Critical patent/EP0561864B1/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
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F04D25/082—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provision for cooling the motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/16—Combinations of two or more pumps ; Producing two or more separate gas flows
    • F04D25/166—Combinations of two or more pumps ; Producing two or more separate gas flows using fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system

Definitions

  • the invention relates to a radial fan according to claim 1.
  • DE-A-2 150 439 describes a blower with an electric motor arranged centrally between two blower wheels with shaft ends protruding on both ends for receiving a one-piece blower wheel with a radially outer radial fan blade ring and between this and a shaft-side hub like a propeller-like propeller trained spokes known, * the axially arranged fan wheels and the central electric motor are completely installed in a common spiral housing.
  • the spiral housing has air guiding devices in such a way that an air flow sucked in axially by the propeller-type propeller from the respective front air inlet opening and pressed axially to the central electric motor is at least partially diverted to the air outlet opening of the spiral housing.
  • CH-A-67 25 31 defines a radial fan with a fan wheel with radial tandem blading and a supporting blading that promotes the direction of the main air flow with obliquely extending fan blades between a radially inner hub disk and a radially outer cover ring as loading limitation of radial blading known; These measures are intended to counteract flow losses in the deflection zone of the cover ring.
  • the cooling of an electric motor that drives the fan by means of a secondary air flow are not addressed and are, among other things. not possible because of the closed bottom of the fan wheel.
  • a radial fan which in spite of low manufacturing and assembly expenditure, cools the driving electric motor by means of a secondary air flow and at the same time does not significantly reduce the main air flow of claim 1 or claim 2 can be achieved;
  • the fan wheel which can expediently be produced as a one-piece injection-molded part, without an additional air guiding device on the housing, a secondary air stream which cools the axially downstream electric motor can be fed back to the main air stream in a simple manner.
  • a particularly advantageous air stratification in this sense of the various ventilation flows sucked in and deflected by the fan wheel according to the invention can be achieved in that the spokes in the intermediate piece between the radially inner hub on the one hand and the radially outer concentric blade ring on the other hand in one radially inner spoke area as the inner axial fan blade pressing the secondary air flow through the axially downstream electric motor and in a radially outer spoke area as the secondary air flow sucking in a return air duct via the electric motor and then external diagonal feeding the blade ring
  • Axial fan blades are formed and, according to claim 3, an essentially axially extending cylindrical partition is arranged between the radially inner axial fan blades on the one hand and the radially inner diagonal axial fan blades on the other hand.
  • FIG. 1 3 an axial plan view of the radial fan according to FIG. 1 3 shows, in a first partial sectional view, a radial fan according to the invention with diagonal axial fan blades between the hub on the rotor shaft side on the one hand and the blade ring on the other hand, consists of axial fan blades pressing the secondary air flow via the electric motor and, in a radially outer region, the diagonal axial fan blades leading back to the blade ring.
  • 1, 2 show a known embodiment of a radial fan with a fan wheel 2 which is fastened to the end of a rotor shaft 11 of an electric motor 1 and is injection-molded in one piece from plastic, with a radially outer blade ring 22 and a radially inner hub 21 and one made from axial fan blades 24 consist of the spoke-like intermediate piece between the hub 21 on the one hand and a support ring 23 on the other hand receiving the double-flow blade ring 22.
  • FIG. 3 shows a double-flow fan wheel 3, the intermediate piece of which, between the rotor shaft-side hub 31 on the one hand, and the support ring 33 receiving the blade ring 32 on the other hand, is formed according to the invention by spoke-like diagonal axial fan blades 34 which generate a secondary air flow over or through the electric motor 1 and then deflect radially to the blade ring 32 of the fan wheel 3.
  • FIG. 4 shows a fan wheel 4 arranged in a spiral housing 5 with an intake funnel 51 and fastened on the rotor shaft 11 of an electric motor 1.
  • the fan wheel 4 which is injection-molded in one piece from plastic, has axial fan blades 44 in a radially inner region and in a radially outer spoke region Diagonal axial fan blades 45 such that an essentially axially directed secondary air flow is sucked out of the suction funnel 51 by the axial fan blades 44 and pressed over or by the electric motor 1 and then via a through the outer housing of the electric motor 1 and a motor capsule surrounding it at a distance 52 is conveyed back as an extended part of the spiral housing 5 through the diagonal axial fan blades 45 in the radially outer spoke area to the blade ring 41 of the single-flow fan wheel 4.
  • a cylindrical partition wall 46 is provided as an integral part of the fan wheel 4; the cylindrical partition 46 projects beyond the outer contour of the intermediate piece between the hub 41 and the blade ring 42 in the region of the transition from the axial fan blades 44 to the diagonal axial fan blades 45 by slight axial extensions, so that air short circuits between the provided guidance of the Secondary air flow on the one hand and the main air flow or the recirculated secondary air flow on the other hand can be avoided.

Landscapes

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

Abstract

On peut obtenir avec une roue de ventilateur (3 ou 4) entraînée par un moteur électrique (1) un courant d'air secondaire de refroidissement du moteur électrique (1), sans que le courant d'air principal ne soit sensiblement réduit et avec une construction très simple, grâce à des rayons conçus comme des aubes (34) axiales diagonales de ventilateur qui aspirent le courant d'air secondaire par-dessus ou à travers le moteur électrique (1) disposé axialement en aval des rayons, puis qui le transmettent à la couronne d'aubes (34). Alternativement, les rayons forment dans une zone radialement intérieure des aubes axiales (44) de ventilateur qui poussent le courant d'air secondaire à travers le moteur électrique (1) disposé axialement en aval des rayons, alors que dans une zone radialement extérieure, les rayons forment des aubes axiales diagonales (45) de ventilateur qui aspirent le courant d'air secondaire dans un canal de retour d'air, à travers le moteur électrique (1), puis qui le transmettent à la couronne d'aubes (42).With a fan wheel (3 or 4) driven by an electric motor (1), it is possible to obtain a secondary air flow for cooling the electric motor (1), without the main air flow being significantly reduced and with a very simple construction, thanks to spokes designed as diagonal axial fan blades (34) which suck the secondary air flow over or through the electric motor (1) arranged axially downstream of the spokes, then which transmit to the crown of blades (34). Alternatively, the spokes form axial fan blades (44) in a radially inner zone which push the secondary air stream through the electric motor (1) arranged axially downstream of the spokes, while in a radially outer zone, the spokes spokes form diagonal axial fan blades (45) which suck the secondary air stream in a return air channel, through the electric motor (1), and then transmit it to the blade crown (42) .

Description

Radiallüfter Radial fan
Die Erfindung bezieht sich auf einen Radiallüfter gemäß Anspruch 1.The invention relates to a radial fan according to claim 1.
Durch die DE-A-2 150 439 ist ein Gebläse mit einem mittig zwischen zwei Gebläserädern angeordneten Elektromotor mit beid- endseitig herausragendeπ Wellenenden zur Aufnahme je eines einstückigen Gebläserades mit einem radial äußeren Radiallüfter- Schaufelkranz und zwischen diesem und einer wellenseitigen Nabe wie eine propellerartige Luftschraube ausgebildeten Speichen bekannt,* die axial hintereinander angeordneten Gebläseräder und der mittige Elektromotor sind vollständig in ein gemeinsames Spiralgehäuse eingebaut. Das Spiralgehäuse weist Luftleitein- richtungen derart auf, daß ein jeweils von der propellerarti¬ gen Luftschraube aus der jeweils zugehörigen stirnseitigen Lufteintrittsöffnung axial angesaugter und axial zu dem mittigen Elektromotor gedrückter Luftstrom, zumindest teilweise, zu der Luftaustrittsöffnung des Spiralgehäuses umgeleitet wird.DE-A-2 150 439 describes a blower with an electric motor arranged centrally between two blower wheels with shaft ends protruding on both ends for receiving a one-piece blower wheel with a radially outer radial fan blade ring and between this and a shaft-side hub like a propeller-like propeller trained spokes known, * the axially arranged fan wheels and the central electric motor are completely installed in a common spiral housing. The spiral housing has air guiding devices in such a way that an air flow sucked in axially by the propeller-type propeller from the respective front air inlet opening and pressed axially to the central electric motor is at least partially diverted to the air outlet opening of the spiral housing.
Durch die CH-A-67 25 31 ist ein Radiallüfter mit einem Lüfter¬ rad mit einer radialen Tandembeschaufelung und einer in Rich¬ tung des Hauptluftstroms fördernden Stützbeschaufelung mit schräg verlaufenden Lüfterschaufeln zwischen einer radial inne- ren Nabenscheibe und einem radial äußeren Abdeckring als Be¬ grenzung der Radialbeschaufelung bekannt; durch diese Ma߬ nahmen soll Strömungsverlusten in der Umlenkzone des Abdeck¬ ringes entgegengewirkt werden. Die Kühlung eines den Lüfter antreibenden Elektromotors durch einen Nebenluftstrom werden nicht angesprochen und sind u.a. wegen des geschlossenen Bodens des Lüfterrades auch nicht möglich.CH-A-67 25 31 defines a radial fan with a fan wheel with radial tandem blading and a supporting blading that promotes the direction of the main air flow with obliquely extending fan blades between a radially inner hub disk and a radially outer cover ring as loading limitation of radial blading known; These measures are intended to counteract flow losses in the deflection zone of the cover ring. The cooling of an electric motor that drives the fan by means of a secondary air flow are not addressed and are, among other things. not possible because of the closed bottom of the fan wheel.
Ein demgegenüber trotz geringen Fertigungs- und Montageaufwandes den antreibenden Elektromotor durch einen Nebenluftstrom mit- kühlender und gleichzeitig den Hauptluftstrom nicht wesentlich vermindernder Radiallüfter kann erfindungsgemäß durch die Lehre des Anspruchs 1 bzw. Anspruchs 2 erreicht werden; dabei kann durch das zweckmäßigerweise als einstückiges Spritzgußteil herstellbare Lüfterrad ohne Zusatz-Luftleiteinrichtung am Gehäuse auf einfache Weise ein zur Kühlung des axial nachge- ordneten Elektromotor kühlende Nebenluftstrom dem Hauptluftstro wieder zugeführt werden.In contrast to this, according to the invention, a radial fan, which in spite of low manufacturing and assembly expenditure, cools the driving electric motor by means of a secondary air flow and at the same time does not significantly reduce the main air flow of claim 1 or claim 2 can be achieved; In this case, by means of the fan wheel, which can expediently be produced as a one-piece injection-molded part, without an additional air guiding device on the housing, a secondary air stream which cools the axially downstream electric motor can be fed back to the main air stream in a simple manner.
Eine in diesem Sinne besonders vorteilhafte Luftschichtung der durch das erfindungsgemäße Lüfterrad angesaugten und umgelenk- ten verschiedenen Lüftströmungen kann dadurch erreicht werden, daß gemäß Anspruch 2 die Speichen in dem Zwischenstück zwischen der radial inneren Nabe einerseits und dem radial äußeren kon¬ zentrischen Schaufelkranz andererseits in einem radial inneren Speichen-Bereich als den Nebenluftstrom durch den axial nach- geordneten Elektromotor drückende innere Axiallüfterschaufel und in einem radial äußeren Speichen-Bereich als den Neben¬ luftstrom in einem Rückluftkanal über den Elektromotor saugen¬ de und anschließend dem Schaufelkranz zuführende äußere Diago¬ nal-Axiallüfterschaufeln ausgebildet sind und gemäß Anspruch 3 eine im wesentlichen sich axial erstreckende zylindrische Trennwand zwischen den radial inneren Axiallüfterschaufeln einerseits und den radial Mußeren Diagonal-Axiallüfterschau¬ feln andererseits angeordnet ist.A particularly advantageous air stratification in this sense of the various ventilation flows sucked in and deflected by the fan wheel according to the invention can be achieved in that the spokes in the intermediate piece between the radially inner hub on the one hand and the radially outer concentric blade ring on the other hand in one radially inner spoke area as the inner axial fan blade pressing the secondary air flow through the axially downstream electric motor and in a radially outer spoke area as the secondary air flow sucking in a return air duct via the electric motor and then external diagonal feeding the blade ring Axial fan blades are formed and, according to claim 3, an essentially axially extending cylindrical partition is arranged between the radially inner axial fan blades on the one hand and the radially inner diagonal axial fan blades on the other hand.
Die Erfindung sowie weitere vorteilhafte Ausgestaltungen der Erfindung gemäß Merkmalen der Uπteransprüche werden im folgen¬ den anhand schematisch dargestellter Ausführungsbeispiele in der Zeichnung näher erläutert; darin zeigenThe invention and further advantageous embodiments of the invention according to the features of the subclaims are explained in more detail below with reference to schematically illustrated exemplary embodiments in the drawing; show in it
FIG 1 in einem axialen Teilschnittbild einen bekannten1 in a partial axial sectional view of a known one
Radiallüfter mit Axiallüfterschaufeln als Speichen zwischen einer radial inneren Nabe einerseits und einem radial äußeren, dazu konzentrischen Radiallüfter-Schaufelkranz andererseits, IG 2 eine axiale Draufsicht auf den Radiallüfter gemäß FIG 1 FIG 3 in einem ersten Teilschnittbild einen erfindungsgemäßen Radiallüfter mit Diagonal-Axiallüfterschaufeln zwischen der lauferwellenseitigen Nabe einerseits und dem Schau¬ felkranz andererseits, FIG 4 einen zweiten erfindungsgemäßen Radiallüfter mit einem Zwischenstück zwischen der lauferwellenseitigen Nabe einerseits und dem Schaufelkranz andererseits, das in einem radial inneren Bereich aus den Nebenluftstrom über den Elektromotor drückenden Axiallüfter-Schaufelπ und in einem radial äußeren Bereich aus den Nebenluft¬ strom zu dem Schaufelkranz rückführenden Diagonal-Axial¬ lüfterschaufeln besteht.Radial fan with axial fan blades as spokes between a radially inner hub on the one hand and a radially outer, concentric radial fan blade ring on the other hand, IG 2 an axial plan view of the radial fan according to FIG. 1 3 shows, in a first partial sectional view, a radial fan according to the invention with diagonal axial fan blades between the hub on the rotor shaft side on the one hand and the blade ring on the other hand, consists of axial fan blades pressing the secondary air flow via the electric motor and, in a radially outer region, the diagonal axial fan blades leading back to the blade ring.
Fig. 1, 2 zeigen eine bekannte Ausführung eines Radiallüfters mit auf dem Ende einer Läuferwelle 11 eines Elektromotors 1 be¬ festigtes, einstückig aus Kunststoff gespritztes Lüfterrad 2 mit einem radial äußeren Schaufelkranz 22 und einer radial inne¬ ren Nabe 21 sowie einem aus Axiallüfterschaufeln 24 bestehen¬ den speichenartigen Zwischenstück zwischen der Nabe 21 einer- seits und einem den doppelflutigen Schaufelkranz 22 aufnehmen¬ den Tragring 23 andererseits. Bei Rotation der Läuferwelle 11 wird ein Hauptluftstrom axial durch einen hier nicht gezeigten Ansaugtrichter eines das Lüfterrad umgebenden Spiralgehäuses angesaugt und radial zu dem Schaufelkranz 22 umgelenkt und durch die Axiallüfterschaufeln 11 gleichzeitig ein zusätz¬ licher, im wesentlichen axial gerichteter Kühlluftstrom über den Elektromotor 1 gedrückt.1, 2 show a known embodiment of a radial fan with a fan wheel 2 which is fastened to the end of a rotor shaft 11 of an electric motor 1 and is injection-molded in one piece from plastic, with a radially outer blade ring 22 and a radially inner hub 21 and one made from axial fan blades 24 consist of the spoke-like intermediate piece between the hub 21 on the one hand and a support ring 23 on the other hand receiving the double-flow blade ring 22. When the rotor shaft 11 rotates, a main air flow is sucked axially through a suction funnel (not shown here) of a spiral housing surrounding the fan wheel and deflected radially to the blade ring 22, and an additional, essentially axially directed cooling air flow is simultaneously pressed by the electric motor 1 through the axial fan blades 11.
Fig. 3 zeigt ein zweiflutiges Lüfterrad 3, dessen Zwischen- stück zwischen der l uferwellenseitigen Nabe 31 einerseits und dem den Schaufelkranz 32 aufnehmenden Tragring 33 andererseits erfindungsgemäß durch speichenartige Diagonal-Axiallüfterschau¬ feln 34 gebildet wird, die einen Nebenluftstrom über bzw. durch den Elektromotor 1 ansaugen und anschließend radial zu dem Schaufelkranz 32 des Lüfterrades 3 umlenken. Figur 4 zeigt einen in einem Spiralgehäuse 5 mit Ansaugtrich¬ ter 51 angeordnetes, auf der Läuferwelle 11 eines Elektromo¬ tor 1 befestigtes Lüfterrad 4. Das einstückig aus Kunststoff gespritzte Lüfterrad 4 weist in einem radial inneren Bereich speichenartige Axiallüfterschaufeln 44 und in einem radial äußeren Speichenbereich Diagonal-Axiallüfterschaufeln 45 derart auf, daß von den Axiallüfterschaufeln 44 ein im wesentlichen axial gerichteter Nebenluftstrom aus dem Ansaugtrichter 51 angesaugt und über bzw. durch den Elektromotor 1 gedrückt und anschließend über einen durch das Außengehäuse des Elektro¬ motors 1 und eine in Abstand umgebende Motorkapsel 52 als ver¬ längerter Teil des Spiralgehäuses 5 durch die Diagonal-Axiallüf¬ terschaufeln 45 im radial äußeren Speichen-Bereich zum Schau¬ felkranz 41 des einflutigen Lüfterrades 4 zurückgefördert wird.3 shows a double-flow fan wheel 3, the intermediate piece of which, between the rotor shaft-side hub 31 on the one hand, and the support ring 33 receiving the blade ring 32 on the other hand, is formed according to the invention by spoke-like diagonal axial fan blades 34 which generate a secondary air flow over or through the electric motor 1 and then deflect radially to the blade ring 32 of the fan wheel 3. FIG. 4 shows a fan wheel 4 arranged in a spiral housing 5 with an intake funnel 51 and fastened on the rotor shaft 11 of an electric motor 1. The fan wheel 4, which is injection-molded in one piece from plastic, has axial fan blades 44 in a radially inner region and in a radially outer spoke region Diagonal axial fan blades 45 such that an essentially axially directed secondary air flow is sucked out of the suction funnel 51 by the axial fan blades 44 and pressed over or by the electric motor 1 and then via a through the outer housing of the electric motor 1 and a motor capsule surrounding it at a distance 52 is conveyed back as an extended part of the spiral housing 5 through the diagonal axial fan blades 45 in the radially outer spoke area to the blade ring 41 of the single-flow fan wheel 4.
In vorteilhafter Weise ist zur lufttechnischen Trennung des den Elektromotor 1 kühlenden Nebenluftstromes einerseits und des direkt vom Einführungstrichter 51 in den Schaufelkranz 42 eintretenden Hauptluftstromes bzw. des nach der Kühlung des Elektromotors 1 durch den Rückluftkanal zurückgefördertenAdvantageously, for air-technical separation of the secondary air flow cooling the electric motor 1, on the one hand, and the main air flow entering the blade ring 42 directly from the introduction funnel 51, or that which is returned after the cooling of the electric motor 1 through the return air duct
Nebenluftstromes andererseits eine zylindrische Trennwand 46 als einstückig mitgespritzter Bestandteil des Lüfterrades 4 vorgesehen; die zylindrische Trennwand 46 überragt die Außen¬ kontur des Zwischenstückes zwischen der Nabe 41 und dem Schaufelkranz 42 im Bereich des Überganges von den Axial¬ lüfterschaufeln 44 zu den Diagonal-Axiallüfterschaufeln 45 um geringe axiale Erstreckungen, so daß Luft-Kurzschlüsse zwischen der vorgesehenden Führung des Nebenluftstroms einerseits und des Hauptluftstroms bzw. des rückgeführten Nebenluftstrom andererseits vermeidbar sind. Secondary air flow, on the other hand, a cylindrical partition wall 46 is provided as an integral part of the fan wheel 4; the cylindrical partition 46 projects beyond the outer contour of the intermediate piece between the hub 41 and the blade ring 42 in the region of the transition from the axial fan blades 44 to the diagonal axial fan blades 45 by slight axial extensions, so that air short circuits between the provided guidance of the Secondary air flow on the one hand and the main air flow or the recirculated secondary air flow on the other hand can be avoided.

Claims

Patentansprüche Claims
1. Radiallüfter mit von einem Innenläufer-Elektromotor (1) angetriebenem Lüfterrad (3 bzw.4) mit durch einen radial äußeren Radiallüfter-Schaufelkranz (32 bzw. 2) innenläufer- geförderte Hauptluftstrom sowie durch als Speichen zwischen einer lauferwellenseitigen Nabe (31 bzw.41) und dem Radial¬ lüfter-Schaufelkranz (32 bzw.42) ausgebildeten Axiallüfter¬ schaufeln gefördertem Nebenluftstrom zur Kühlung des Inπen- laufer-Elektromotors (1), wobei die Speichen als den Neben¬ luftstrom über bzw. durch den axial nachgeordneten Elektromotor (1) saugende und anschließend dem Schaufelkranz (3) zuführende Diagonal-Axiallüfterschaufeln (34) ausgebildet sind. (FIG 3)1. A radial fan with a fan wheel (3 or 4) driven by an internal rotor electric motor (1) with a main air flow conveyed by an internal radial radial fan blade ring (32 or 2) and as a spoke between a hub on the rotor shaft side (31 or 41) and the radial fan blade ring (32 or 42) designed axial fan blades conveyed secondary air flow for cooling the internal rotor electric motor (1), the spokes being the secondary air flow above or through the axially downstream electric motor ( 1) suction and then to the blade ring (3) feeding diagonal axial fan blades (34) are formed. (FIG 3)
2. Radiallüfter mit von einem Innenläufer-Elektromotor (1) angetriebenem Lüfterrad (3 bzw.4) mit durch einen radial äußeren Radiallüfter-Schaufelkranz (32 bzw.42) innenläufer- gefördertem Hauptluftstrom sowie durch als Speichen zwischen einer lauferwellenseitigen Nabe (31 bzw.41) und dem Radial- lüfter-Schaufelkranz (32 bzw.42) ausgebildeten Axiallüfter¬ schaufeln gefördertem Nebenluftstrom zur Kühlung des Innen¬ läufer-Elektromotors (1), wobei die Speichen in einem radial inneren Speichen-Bereich als den Nebenluftstrom durch den axial nachgeordneten Elektromotor (1) drückende Axiallüfterschaufeln (44) und in einem radial äußeren Speichen-Bereich als den2. Radial fan with a fan wheel (3 or 4) driven by an internal rotor electric motor (1) with a main air flow conveyed by an internal radial radial fan blade ring (32 or 42) and as spokes between a hub on the rotor shaft side (31 or 41) and the radial fan blade ring (32 or 42) designed axial fan blades conveyed secondary air flow for cooling the inner rotor electric motor (1), the spokes in a radially inner spoke area as the secondary air flow through the axially downstream Electric motor (1) pressing axial fan blades (44) and in a radially outer spoke area than that
Nebenluftstrom in einem Rückluftkanal über den Elektromotor (1) saugende und anschließend dem Schaufelkranz (42) zuführende äußere Diagonal-Axiallüfterschaufeln (45) ausgebildet sind. (FIG 4)Secondary air flow in a return air duct via the electric motor (1) is suction and then the outer diagonal axial fan blades (45) are supplied to the blade ring (42). (FIG 4)
3. Radiallüfter nach Anspruch 2, wobei eine im wesentlichen sich axial erstreckende zylindrische Trennwand (46) zwischen den radial inneren Axiallüfterschaufeln (44) einerseits und den radial äußeren Diagonal-Axiallüfterschlaufeln (45) andererseits vorgesehen ist. (FIG 4) 3. Radial fan according to claim 2, wherein a substantially axially extending cylindrical partition (46) between the radially inner axial fan blades (44) on the one hand and the radially outer diagonal axial fan blades (45) on the other hand is provided. (FIG 4)
4. Radiallüfter nach Anspruch 3, wobei die zylindrische Trennwand (46) als einstückiger Bestandteil mit den inneren Axiallüfterschaufeln (44) und den äußeren Diagonal-Axiallüfter¬ schaufeln (45) verbunden ist.4. Radial fan according to claim 3, wherein the cylindrical partition (46) is connected as an integral part with the inner axial fan blades (44) and the outer diagonal axial fan blades (45).
5. Radiallüfter nach Anspruch 3 oder 4, wobei die zylindrische Trennwand (46) die Außenkontur des Zwischenstückes zwischen der Nabe (41) und dem Schaufelkranz (42) im Bereich des Übergangs von den Axiallüfterschaufeln (44) zu den Diagonal-Lüfterschau- fein (45) um geringe axiale Erstreckungen im Sinne einer Ver¬ meidung von Luft-Kurzschlüsseή zwischen dem Hauptluftstrom einerseits und dem Nebenluftstrom andererseits überragt.5. Radial fan according to claim 3 or 4, wherein the cylindrical partition (46) the outer contour of the intermediate piece between the hub (41) and the blade ring (42) in the region of the transition from the axial fan blades (44) to the diagonal fan show fine ( 45) by small axial extensions in the sense of avoiding air short circuits between the main air flow on the one hand and the secondary air flow on the other.
6. Radiallüfter nach einem der Ansprüche 1-5, wobei die Nabe, die Speichen, der Schaufelkranz und gegebenenfalls die zylin¬ drische Trennwand jeweils Bestandteil eines einstückigen Spritzgußteils, insbesondere eines Kunststoff-Spritzgußteils, sind. 6. Radial fan according to one of claims 1-5, wherein the hub, the spokes, the blade ring and optionally the cylindrical partition are each part of an integral injection molded part, in particular a plastic injection molded part.
EP92900338A 1990-12-12 1991-12-10 Radial ventilator Expired - Lifetime EP0561864B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE9016808U DE9016808U1 (en) 1990-12-12 1990-12-12 Radial fan
EP90123947 1990-12-12
EP90123947 1990-12-12
DE9016808U 1990-12-12
PCT/EP1991/002369 WO1992010682A1 (en) 1990-12-12 1991-12-10 Radial ventilator

Publications (2)

Publication Number Publication Date
EP0561864A1 true EP0561864A1 (en) 1993-09-29
EP0561864B1 EP0561864B1 (en) 1995-03-08

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Application Number Title Priority Date Filing Date
EP92900338A Expired - Lifetime EP0561864B1 (en) 1990-12-12 1991-12-10 Radial ventilator

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DE (1) DE59104914D1 (en)
WO (1) WO1992010682A1 (en)

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US5814908A (en) * 1996-04-30 1998-09-29 Siemens Electric Limited Blower wheel with axial inlet for ventilation
AU1860299A (en) * 1998-03-10 1999-09-23 Pdl Holdings Limited Air flow unit
FR2781530B1 (en) * 1998-07-22 2000-10-20 Valeo Climatisation CENTRIFUGAL TURBINE, IN PARTICULAR FOR HEATING AND/OR AIR CONDITIONING INSTALLATIONS IN MOTOR VEHICLES
KR100401071B1 (en) * 2001-04-23 2003-10-10 위니아만도 주식회사 Brushless motor for blower of heat exchanger
CN101617126B (en) 2006-11-24 2011-09-07 博泽汽车部件有限公司及两合公司,乌茨堡 Axial fan for a vehicle radiator
US10550847B2 (en) 2011-03-26 2020-02-04 Ebm-Papst St. Georgen Gmbh & Co. Kg Mixed-flow or diagonal ventilating fan with consistent cooling
WO2022163497A1 (en) * 2021-01-27 2022-08-04 株式会社ヴァレオジャパン Centrifugal fan and air-conditioning device for vehicle

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Also Published As

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DE59104914D1 (en) 1995-04-13
WO1992010682A1 (en) 1992-06-25
EP0561864B1 (en) 1995-03-08

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