EP2541068B1 - Axial ventilator with flow guidance body - Google Patents
Axial ventilator with flow guidance body Download PDFInfo
- Publication number
- EP2541068B1 EP2541068B1 EP11171974.6A EP11171974A EP2541068B1 EP 2541068 B1 EP2541068 B1 EP 2541068B1 EP 11171974 A EP11171974 A EP 11171974A EP 2541068 B1 EP2541068 B1 EP 2541068B1
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- European Patent Office
- Prior art keywords
- fan
- guiding element
- stator
- flow
- flow guiding
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
- F04D29/329—Details of the hub
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/541—Specially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/541—Specially adapted for elastic fluid pumps
- F04D29/545—Ducts
- F04D29/547—Ducts having a special shape in order to influence fluid flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
- F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
Definitions
- the invention relates to an axial fan with a motor comprising a stator and a rotor, projecting from the outer periphery of the rotor designed as a fan impeller blades which move a gaseous medium in an axially directed main flow direction from an input side to an output side.
- the invention is based on the object to provide an axial fan of the type mentioned, with the constructive little consuming way improvements in performance can be achieved in terms of efficiency.
- the noise behavior should not be affected or preferably also improved.
- Such a flow guide body provided according to the invention which is mounted behind the fan in the flow direction, advantageously acts as an obstruction or baffle plate for the conveyed gas flow, which prevents a volume flow from a fluidizing area from being sucked in behind the engine.
- Such turbulence zones which arise after detachment of a flow from a body flowing around, are also referred to as "dead water areas" in the case of a liquid as a flow medium. There is no laminar flow anymore.
- the inventively provided flow guide also causes a return flow of the flow medium can only begin in a diameter range which is greater than the hub diameter, whereby the return flow is more difficult overall. This in turn is due to the fact that the return flow must be against the centrifugal force, which increases proportionally with the distance to the fan axis.
- a backflow region resulting in particular with the use of axial fans with increased back pressure can be kept relatively small according to the invention. Since the flow through the fan separates only at a larger than the hub diameter, it can also reach a comparatively higher pressure until the time of their replacement than without the flow guide. This increases the total pressure increase that can be achieved by the fan, and the efficiency increases by a few percentage points compared to a fan without a flow guide body.
- the inventively provided flow guide can advantageously be used together with a mounted on the axial fan on the output side of the stator protective grid. It can be designed as a separate component or integrated into the protective grid, d. H. especially attached thereto or in it. Also, a one-piece design with the protective grid is possible in this regard.
- the flow guide may advantageously be fastened as an attachable, screw-fastenable, rivetable or weldable plastic or sheet metal part, ie non-positively, positively and / or cohesively, in particular in production and assembly technically less complicated as an attachable plastic part or in a robust design with higher strength than weldable sheet metal part, be executed.
- the flow guide body is designed with a conical, in particular truncated conical basic shape, wherein its lateral surface diverges in the mounting state in the direction away from the stator.
- the inclination of the lateral surface causes a deflection of the flow to the outside and thus a better conductivity of the flow guide.
- a fan 1 according to the invention, which is designed in the axial design as shown, a stator 2 and a rotor 3, wherein attached to the outer periphery U3 of the rotor designed as a fan impeller with an outer diameter D3 3 blades are a gaseous medium in an axially directed main flow direction S from an input side E move to an exit side A.
- the tips of the blades 4 run on a circumference U4 with a diameter D4, which can be regarded as the maximum diameter of the fan impeller.
- a rotationally symmetrical flow guide body 5 which has an outer diameter D5, which is larger than the outer diameter D2 of the stator hub 2a and larger than the outer diameter D3 of the stator hub 2, is fastened on the output side A directly or indirectly on the stator 2 concentric to a stator hub 2a Rotor 3 is. Its maximum possible size is theoretically limited by the diameter D4 of the circumference U4 to the blades 4, wherein the outer diameter D5 of the Strömungsleit stresses 5 should be at least 15% smaller than diameter D4 of the circumference U4, so that a flow in the axially directed main flow direction S passes ,
- the flow guide 5 can be designed as clip-on, bolt-on, vernietbares or weldable plastic or sheet metal part, in particular as an attachable plastic part or weldable sheet metal part.
- the flow guide 5 is screwed to the stator 2, in particular to its stator hub 2a by means of the screws 6.
- the above-mentioned optimum ratio range can consequently also be determined by the following formula (2) or simple formula (3)
- D 5 D 3 + 0 . 2 ... 0 . 3 * D 4 - D 3
- a flow deflection can be brought about by an oblique position of the inflow surface of the flow guide body 5 formed by the jacket 5a.
- the flow guide body 5 is designed with a conical, in particular truncated conical basic shape, wherein its lateral surface 5a diverges in the mounting state in the direction away from the stator 2.
- the lateral surface 5a of the Strömungsleit stresses 5 according to the invention extends at an angle ⁇ to the fan axis XX extends, which is not smaller than 30 ° and preferably in the range of 55 ° to 65 °. In this angular range, the largest increases in efficiency are recorded.
- the two illustrated embodiments of the invention show that on the output side A on the stator 2, a protective grid 7 is attached.
- the flow guide 5 is integrated in the protective grid 7.
- the flow guide body 5 and the protective grid 7 are screwed to the stator hub 2a by means of the screws 6.
- the screws 6 engage through fastening openings in radially extending fastening struts 7a for the protective grille 7 or for its concentrically extending grille struts 7b and fastening openings in a perpendicular to the axially directed main flow direction S edge 5b of the Strömungsleit emotionss 5.
- Flow guide 5 in the protective grid 7 means that the concentric circumferentially extending grid struts 7b of the protective grid 7 are recessed in a material-economically favorable manner in the flow guide 5.
- the jacket 5a of the flow guide 5 fits into the Form of the protective grid 7 and advantageously takes over partially its protective function.
- the first embodiment shows that, in order to increase the efficiency of a fan according to the invention, it is not necessary to perform a new blading on the rotor 3, but that the flow guide 5 provided according to the invention can be used together with fan components known per se.
- the flow guide 5 provided according to the invention can be used together with fan components known per se.
- no new fan types have to be defined to increase the efficiency, but existing fans can be retrofitted with a flow guide body 5 according to the invention.
- the noise behavior is not impaired by this, but even an improvement could be observed.
- An axial fan 1 according to the invention can be provided, for example, for installation in a building wall or in a device or a machine, preferably with free blow-out, that is without a downstream pipe system, since in this case the flow guide body 5 develops its highest efficiency due to the overall flow conditions being established.
- the present invention is not limited to the illustrated embodiments, but includes all means of the invention in the same sense and measures. It is also within the scope of the invention, if the geometric design of the axial fan 1 deviates from the illustrated or if instead of the protective grid 7 or additionally a support cross for a "stand-alone" version of the axial fan according to the invention is present.
- the Strömungsleitmaschine 5 can - as shown - directly on the stator 2 or indirectly - for example, via the protective grille 7 - are fixed without departing from the scope of the invention.
- FIG. 7 an embodiment of an axial fan 1 according to the invention, in which the blades 4 are surrounded on the outside by a conically tapering in the main flow direction S and then formed laterally hollow cylindrical guide nozzle 8.
- a Leitdüse 8 can be performed depending on the installation situation with different axial length, z. B. as a so-called short nozzle, in which the blades 4 protrude on the output side A from the nozzle channel 8a. In this way it is avoided, inter alia, that the guided through the flow guide 5 flow bounces on the nozzle wall 8 b, what u. U. could lead to efficiency losses.
- the Leitdüse 8 optimizes in cooperation with the StrömungsleitMech 5 in a synergistic manner the flow pattern in the fan 1 according to the invention in the illustrated embodiment, the round Leitdüse 8 in an expedient manner in all sides comprehensive, especially square frame structure 9 is embedded, which has mounting holes 9a for mounting ,
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
Die Erfindung betrifft einen Axialventilator mit einem Motor, der einen Stator und einen Rotor umfasst, wobei vom Außenumfang des als Ventilatorlaufrad ausgebildeten Rotors Schaufeln abragen, die ein gasförmiges Medium in einer axial gerichteten Hauptströmungsrichtung von einer Eingangsseite zu einer Ausgangsseite bewegen.The invention relates to an axial fan with a motor comprising a stator and a rotor, projecting from the outer periphery of the rotor designed as a fan impeller blades which move a gaseous medium in an axially directed main flow direction from an input side to an output side.
Bei derartigen Ventilatoren, die in vielfältigen Ausführungen bekannt sind, besteht ein ständiges Entwicklungsziel darin, den erreichbaren Wirkungsgrad zu maximieren. Unter dem Wirkungsgrad wird dabei - bezogen nur auf das Ventilatorlaufrad - im engeren Sinn das Verhältnis der Förderleistung des Ventilators zum Leistungsbedarf der Ventilatorwelle verstanden. Bei einer vorgegebenen Wellenleistung wird der Wirkungsgrad durch den geförderten Volumenstrom und die durch den Ventilator bewirkte Totaldruckerhöhung bestimmt, aus deren Produkt sich die Förderleistung ergibt, wobei entsprechend der sogenannten Bernoulli-Gleichung unter Totaldruck die Summe aus statischem und dynamischem Druck verstanden wird.In such fans, which are known in various designs, a constant development goal is to maximize the achievable efficiency. Under the efficiency is understood - relative only to the fan impeller - in the narrower sense, the ratio of the flow rate of the fan to the power requirement of the fan shaft. At a given shaft performance, the efficiency is determined by the volume flow and the total pressure increase caused by the fan, from the product of which the flow rate results, according to the so-called Bernoulli equation under total pressure the sum of static and dynamic pressure is understood.
Im Zusammenhang mit der Neufassung der sogenannten Ökodesign-Richtlinie bzw. ErP-Richtlinie (Richtlinie 2009/125/EG der Europäischen Union), die zur Minimierung von schädlichen Umweltbelastungen nicht nur energiebetriebene Produkte (Energy-using products), sondern generell energieverbrauchsrelevante Produkte ("Energy-related Products") beinhaltet, hat dieses Entwicklungsziel an Relevanz zugenommen, wobei es auf jeden Prozentpunkt der Steigerung des Wirkungsgrades ankommt. Dies gilt sowohl für Ventilatoren, die als "Stand-alone"-Gerät betrieben werden, als auch für Ventilatoren, die als Komponente in ein Gerät oder in eine Anlage integriert sind. Die ErP-Richtlinie legt dabei bestimmte Mindestwirkungsgrade fest, wobei hier unter dem Wirkungsgrad im weiteren Sinne der Wirkungsgrad des gesamten Ventilators, also der Einheit aus Steuerelektronik (falls vorhanden), des Motors und des Vontilatorlaufrades bewertet werden.In the context of the recast of the so-called Ecodesign Directive or ErP Directive (Directive 2009/125 / EC of the European Union), which, in order to minimize harmful environmental impacts, not just energy-related Products (energy-using products), but generally energy-related products, this development goal has increased in relevance, where it depends on every percentage point of the increase in efficiency. This applies both to fans that are operated as a "stand-alone" device and fans that are integrated as a component in a device or in a system. The ErP guideline defines certain minimum efficiencies, whereby here the efficiency of the entire fan, ie the unit of control electronics (if present), of the motor and the fan coil are evaluated under the efficiency in a broader sense.
Als Stand der Technik sind im vorliegenden technischen Gebiet beispielsweise die US-Patentanmeldungen
Der Erfindung liegt die Aufgabe zu Grunde, einen Axialventilator der eingangs genannten Art zu schaffen, mit dem auf konstruktiv wenig aufwändige Weise Verbesserungen des Betriebsverhaltens hinsichtlich des Wirkungsgrades erzielt werden können. Dabei soll das Geräuschverhalten nicht beeinträchtigt bzw. vorzugsweise ebenfalls verbessert werden.The invention is based on the object to provide an axial fan of the type mentioned, with the constructive little consuming way improvements in performance can be achieved in terms of efficiency. The noise behavior should not be affected or preferably also improved.
Ein solcher erfindungsgemäß vorgesehener Strömungsleitkörper, der in Strömungsrichtung hinter dem Ventilator angebracht ist, wirkt vorteilhafterweise als eine Versperrungs- oder Prallplatte für den geförderten Gasstrom, durch die verhindert wird, dass ein Volumenstrom aus einem Verwirbelungsgebiet hinter dem Motor angesaugt wird. Derartige Verwirbelungszonen, die nach Ablösung einer Strömung von einem umströmten Körper entstehen, werden im Falle einer Flüssigkeit als Strömungsmedium auch als "Totwassergebiete" bezeichnet. Dort gibt es keine laminare Strömung mehr.Such a flow guide body provided according to the invention, which is mounted behind the fan in the flow direction, advantageously acts as an obstruction or baffle plate for the conveyed gas flow, which prevents a volume flow from a fluidizing area from being sucked in behind the engine. Such turbulence zones, which arise after detachment of a flow from a body flowing around, are also referred to as "dead water areas" in the case of a liquid as a flow medium. There is no laminar flow anymore.
Der erfindungsgemäß vorgesehene Strömungsleitkörper bewirkt außerdem, dass eine Rückströmung des Strömungsmediums erst in einem Durchmesserbereich beginnen kann, der größer als der Nabendurchmesser ist, wodurch die Rückströmung insgesamt erschwert wird. Dies ist wiederum dadurch bedingt, dass die Rückströmung entgegen der Fliehkraft erfolgen muss, welche proportional mit dem Abstand zur Ventilatorachse zunimmt. Ein sich insbesondere beim Einsatz von Axialventilatoren bei erhöhtem Gegendruck ergebendes Rückstromgebiet kann erfindungsgemäß vergleichsweise klein gehalten werden. Da sich die Strömung durch den Lüfter erst bei einem größeren als dem Nabendurchmesser ablöst, kann sie bis zum Zeitpunkt ihrer Ablösung auch einen vergleichsweise höheren Druck erreichen als ohne den Strömungsleitkörper. Damit steigt die durch den Ventilator erzielbare Totaldruckerhöhung an, und der Wirkungsgrad erhöht sich gegenüber einem Ventilator ohne Strömungsleitkörper um einige Prozentpunkte.The inventively provided flow guide also causes a return flow of the flow medium can only begin in a diameter range which is greater than the hub diameter, whereby the return flow is more difficult overall. This in turn is due to the fact that the return flow must be against the centrifugal force, which increases proportionally with the distance to the fan axis. A backflow region resulting in particular with the use of axial fans with increased back pressure can be kept relatively small according to the invention. Since the flow through the fan separates only at a larger than the hub diameter, it can also reach a comparatively higher pressure until the time of their replacement than without the flow guide. This increases the total pressure increase that can be achieved by the fan, and the efficiency increases by a few percentage points compared to a fan without a flow guide body.
Der erfindungsgemäß vorgesehene Strömungsleitkörper kann mit Vorteil zusammen mit einem am Axialventilator ebenfalls auf der Ausgangsseite am Stator angebrachten Schutzgitter eingesetzt werden. Er kann dabei als separates Bauteil ausgeführt oder in das Schutzgitter integriert sein, d. h. insbesondere daran oder darin befestigt sein. Auch eine einteilige Ausführung mit dem Schutzgitter ist diesbezüglich möglich.The inventively provided flow guide can advantageously be used together with a mounted on the axial fan on the output side of the stator protective grid. It can be designed as a separate component or integrated into the protective grid, d. H. especially attached thereto or in it. Also, a one-piece design with the protective grid is possible in this regard.
Der Strömungsleitkörper kann mit Vorteil als anklipsbares, anschraubbares, vernietbares oder anschweißbares Kunststoff- oder Blechteil, also kraft-, form- und/oder stoffschlüssig befestigbar, insbesondere in fertigungs- und montagetechnisch wenig aufwändiger Weise als anklipsbares Kunststoffteil oder in robuster Bauart mit höherer Festigkeit als anschweißbares Blechteil, ausgeführt sein.The flow guide may advantageously be fastened as an attachable, screw-fastenable, rivetable or weldable plastic or sheet metal part, ie non-positively, positively and / or cohesively, in particular in production and assembly technically less complicated as an attachable plastic part or in a robust design with higher strength than weldable sheet metal part, be executed.
Erfindungsgemäß ist vorgesehen, dass der Strömungsleitkörper mit konischer, insbesondere kegelstumpfartiger Grundgestalt ausgeführt ist, wobei seine Mantelfläche im Montagezustand in vom Stator wegweisender Richtung divergiert. Hierbei kommt in vorteilhafter Weise zum Tragen, dass die Schrägstellung der Mantelfläche eine Umlenkung der Strömung nach außen und damit ein besseres Leitvermögen des Strömungsleitkörpers bewirkt.According to the invention, it is provided that the flow guide body is designed with a conical, in particular truncated conical basic shape, wherein its lateral surface diverges in the mounting state in the direction away from the stator. In this case, advantageously comes into play, that the inclination of the lateral surface causes a deflection of the flow to the outside and thus a better conductivity of the flow guide.
Weitere vorteilhafte Ausführungen der Erfindung sind in den Unteransprüchen und der nachfolgenden Beschreibung enthalten. Anhand mehrerer in den beiliegenden Zeichnungsfiguren dargestellter Ausführungsbeispiele wird die Erfindung näher erläutert. Es zeigen:
-
Fig. 1 : eine erste Ausführung eines erfindungsgemäßen Axialventilators in perspektivischer Darstellung, von der Eingangsseite des Strömungsmediums her gesehen, -
Fig. 2 : eine Seitenansicht der inFig. 1 dargestellten Ausführung eines erfindungsgemäßen Axialventilators, -
Fig. 3 : eine Aufsicht auf die inFig. 1 dargestellte Ausführung eines erfindungsgemäßen Axialventilators von der Ausgangsseite des Strömungsmediums her, -
Fig. 4 : eine zweite Ausführung eines erfindungsgemäßen Axialventilators in perspektivischer Darstellung, von der Eingangsseite des Strömungsmediums her gesehen, -
Fig. 5 eine Seitenansicht der inFig. 4 dargestellten Ausführung eines erfindungsgemäßen Axialventilators, -
Fig. 6 eine Aufsicht auf die inFig. 4 dargestellte Ausführung eines erfindungsgemäßen Axialventilators von der Ausgangsseite des Strömungsmediums her, -
Fig. 7 in einer Darstellung ähnlich wie inFig. 1 und4 , eine weitere Ausführung eines erfindungsgemäßen Axialventilators.
-
Fig. 1 FIG. 2 shows a perspective view of a first embodiment of an axial fan according to the invention, seen from the inlet side of the flow medium, FIG. -
Fig. 2 : a side view of inFig. 1 illustrated embodiment of an axial fan according to the invention, -
Fig. 3 : a top view of the inFig. 1 illustrated embodiment of an axial fan according to the invention from the output side of the flow medium ago, -
Fig. 4 FIG. 2 shows a perspective view of a second embodiment of an axial fan according to the invention, seen from the inlet side of the flow medium, -
Fig. 5 a side view of inFig. 4 illustrated embodiment of an axial fan according to the invention, -
Fig. 6 a supervision of the inFig. 4 illustrated embodiment of an axial fan according to the invention from the output side of the flow medium ago, -
Fig. 7 in a representation similar to inFig. 1 and4 , Another embodiment of an axial fan according to the invention.
In den Figuren der Zeichnung sind dieselben Teile stets mit denselben Bezugszeichen versehen, so dass sie in der Regel auch jeweils nur einmal beschrieben werden.In the figures of the drawing, the same parts are always provided with the same reference numerals, so that they are usually described only once in each case.
Wie zunächst aus der Darstellung in
Erfindungsgemäß ist vorgesehen, dass auf der Ausgangsseite A mittelbar oder unmittelbar am Stator 2 konzentrisch zu einer Statornabe 2a ein rotationssymmetrischer Strömungsleitkörper 5 befestigt ist, der einen Außendurchmesser D5 aufweist, welcher größer als der Außendurchmesser D2 der Statornabe 2a, und größer als der Außendurchmesser D3 des Rotors 3 ist. Seine maximal mögliche Größe wird theoretisch durch den Durchmesser D4 des Umkreises U4 um die Schaufeln 4 begrenzt, wobei der Außendurchmesser D5 des Strömungsleitkörpers 5 jedoch mindestens 15 % kleiner als Durchmesser D4 des Umkreises U4 sein sollte, damit ein Förderstrom in die axial gerichteten Hauptströmungsrichtung S gelangt.According to the invention, a rotationally symmetrical
Die mit der Erfindung verbundenen Vorteile wurden bereits vorstehend aufgezeigt. Insbesondere zeigt sich, dass die Strömung durch den Axialventilator 1 am Außendurchmesser D5 des Strömungsleitkörpers 5, wo sie ablöst, einen höheren Druck erreichen kann als am Außendurchmesser D2 der Statornabe 2a, wodurch ein höherer Wirkungsgrad erzielt wird.The advantages associated with the invention have already been shown above. In particular, it can be seen that the flow through the
Der Strömungsleitkörper 5 kann als anklipsbares, anschraubbares, vernietbares oder anschweißbares Kunststoff- oder Blechteil, insbesondere als anklipsbares Kunststoffteil oder als anschweißbares Blechteil, ausgeführt sein. In den beiden dargestellten Ausführungsformen ist der Strömungsleitkörper 5 mit dem Stator 2, insbesondere mit dessen Statornabe 2a mittels der Schrauben 6 verschraubt.The
Erfindungsgemäß ist der Außendurchmesser D5 des Strömungsleitkörpers 5 so bemessen, dass der Außenumfang U5 des Strömungsleitkörpers 5 auf einem Radius Ropt verläuft, der vom Außenumfang U3 des Rotors 3 um etwa 20 % bis 30 % der Länge L4 der Schaufeln 4 entfernt ist. Da die Schaufeln 4 unterschiedlich - z. B. mit einer Krümmung und/oder mit einer geschwungenen Außenkante - ausgeführt werden können, wird als maßgebliche Länge L4 der Schaufeln 4 ein Wert angesehen, der sich entsprechend der Formel (1):
Im Falle einer konischen Ausbildung des Außenumfangs U3 des Rotors 3 wird dabei mit dem größten Durchmesserwert D3 gerechnet.In the case of a conical design of the outer circumference U3 of the
Die entsprechenden Durchmesser- und Längenverhältnisse sind insbesondere durch
Die beiden dargestellten Ausführungsformen der Erfindung zeigen, dass auf der Ausgangsseite A am Stator 2 ein Schutzgitter 7 befestigt ist. Die in
Die erste Ausführung zeigt stattdessen, dass es, um den Wirkungsgrad eines Ventilators erfindungsgemäß zu erhöhen, nicht notwendig ist, am Rotor 3 eine neue Beschaufelung vorzunehmen, sondern dass der erfindungsgemäß vorgesehene Strömungsleitkörper 5 zusammen mit an sich bekannten Ventilatorbauteilen eingesetzt werden kann. Mit anderen Worten: Es müssen zur Erhöhung des Wirkungsgrades keine neuen Ventilatortypen definiert werden, sondern bestehende Ventilatoren können mit einem erfindungsgemäßen Strömungsleitkörper 5 nachgerüstet werden. Das Geräuschverhalten wird hierdurch nicht verschlechtert, sondern es konnte sogar eine Verbesserung beobachtet werden.Instead, the first embodiment shows that, in order to increase the efficiency of a fan according to the invention, it is not necessary to perform a new blading on the
Ein erfindungsgemäßer Axialventilator 1 kann beispielsweise zur Montage in einer Gebäudewand oder in einem Gerät bzw. einer Maschine, vorzugsweise mit freier Ausblasung, also ohne nachgeschaltetes Rohrsystem, vorgesehen werden, da in diesem Fall der Strömungsleitkörper 5 aufgrund der sich einstellenden Gesamtströmungsverhältnisse seine höchste Effizienz entfaltet. Wie bereits aus den vorstehenden Ausführungen hervorgeht, ist dabei die vorliegende Erfindung nicht auf die dargestellten Ausführungsbeispiele beschränkt, sondern umfasst alle im Sinne der Erfindung gleichwirkenden Mittel und Maßnahmen. So fällt es auch in den Rahmen der Erfindung, wenn die geometrische Gestaltung des Axiallüfters 1 von der dargestellten abweicht oder wenn anstelle des Schutzgitters 7 oder zusätzlich ein Tragkreuz für eine "Stand-alone"-Ausführung des erfindungsgemäßen Axialventilators vorhanden ist. Der Strömungsleitkörper 5 kann - wie dargestellt - unmittelbar am Stator 2 oder mittelbar - beispielsweise über das Schutzgitter 7 - befestigt werden, ohne dass der Rahmen der Erfindung verlassen wird.An
Der Fachmann kann des Weiteren zusätzliche zweckmäßige technische Maßnahmen vorsehen, ohne dass der Rahmen der Erfindung verlassen wird. So zeigt
- 11
- AxialventilatorAxial
- 22
- Stator von 1Stator of 1
- 2a2a
- Statornabe von 1Stator hub of 1
- 33
- Rotor von 1Rotor of 1
- 44
- Schaufeln an 3Shovels on 3
- 55
- Strömungsleitkörperflow guide
- 5a5a
- Mantelfläche von 5Lateral surface of 5
- 5b5b
- Rand von 5Edge of 5
- 66
- Schraubescrew
- 77
- Schutzgitterguard
- 7a7a
- radiale Befestigungsstrebe von 7radial mounting strut of 7
- 7b7b
- umfangsgemäße Gitterstrebe von 7circumferential lattice strut of 7
- 88th
- Leitdüsepilot nozzle
- 8a8a
- Düsenkanal von 8Nozzle channel of 8
- 8b8b
- Düsenwandung von 8Nozzle wall of 8
- 99
- Rahmenstruktur für 8Frame structure for 8
- 9a9a
- Befestigungsöffnungen in 9Mounting holes in 9
- AA
- Ausgangsseiteoutput side
- D2D2
- Außendurchmesser von 2aOuter diameter of 2a
- D3D3
- Außendurchmesser von 3Outer diameter of 3
- D4D4
- Außendurchmesser von 4Outer diameter of 4
- D5D5
- Außendurchmesser von 5Outer diameter of 5
- Ee
- Eingangsseiteinput side
- SS
- HauptströmungsrichtungMain flow direction
- U3U3
- Umfang von 3 (Durchmesser D3)Circumference of 3 (diameter D3)
- U4U4
- Umkreis um 4 (Kreisumfang, Durchmesser D4)Circle around 4 (circumference, diameter D4)
- U5U5
- Umfang von 5 (Durchmesser D5)Circumference of 5 (diameter D5)
- X-XX X
- Längsachse von 1Longitudinal axis of 1
- µμ
- Winkel zwischen 5a und X-XAngle between 5a and X-X
Claims (7)
- An axial fan (1) with a motor comprising a stator (2) and a rotor (3), wherein blades (4) are protruding from an outer periphery (U3) of the rotor (3), which is configured as a fan wheel, which moves a gaseous medium in an axially directed main flow direction (S) from an inlet side (E) to an outlet side (A), wherein a rotation-symmetric flow guiding element (5) is mounted on the outlet side (A) directly or indirectly on the stator (2), concentric to a stator hub (2a), the flow-guiding element (5) having an outer diameter (D5) that is greater than an outer diameter (D2) of the stator hub (2a), greater than an outer diameter (D3) of the rotor (3), and smaller than an diameter (D4) of a perimeter (U4) around the blades (4),
characterized in that the outer diameter (D5) of the flow guiding element (5) is dimensioned in accordance with the formula D5 = D3 + (0.2 ... 0.3) * (D4 - D3), wherein the flow guiding element (5) is configured in basic conical shape, wherein his jacket surface (5a) is diverging in from the stator (2) away facing direction when assembled, and wherein the jacket surface (5a) of the flow guiding element (5) runs at an angle (µ) with respect to a longitudinal axis of the fan, which is no less than 30°. - The fan (1) of claim 1, wherein at the outlet side (A) on the stator (2) a protective screen or a spider is mounted.
- The fan (1) of claim 2, wherein the flow guiding element (5) is integrated into the protective screen or the spider.
- The fan (1) of one of claims 1 to 3, wherein that the flow guiding element (5) is configured as a plastic or metal part that is clipped, screwed, riveted or welded on, especially implemented as a plastic part clipped on or as a metal part welded on.
- The fan (1) of one of claims 1 to 4, wherein the flow guiding element (5) has the basic shape of a truncated cone.
- The fan (1) of one of claims 1 to 5, wherein the jacket surface (5a) of the flow guiding element (5) runs at an angle (µ) with respect to a longitudinal axis of the fan, within the range of 55° to 65°.
- The fan (1) of one of claims 1 to 6, wherein the blades (4) are enclosed on the outside by a guide nozzle (8) that is conical in the main flow direction (S) and further, has especially a hollow cylindrical shape.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11171974.6A EP2541068B1 (en) | 2011-06-29 | 2011-06-29 | Axial ventilator with flow guidance body |
ES11171974.6T ES2598229T3 (en) | 2011-06-29 | 2011-06-29 | Axial fan with flow orientation body |
US13/528,066 US9097261B2 (en) | 2011-06-29 | 2012-06-20 | Axial fan with flow guide body |
CN2012102262902A CN102852856A (en) | 2011-06-29 | 2012-06-29 | Axial fan with flow guidance body |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11171974.6A EP2541068B1 (en) | 2011-06-29 | 2011-06-29 | Axial ventilator with flow guidance body |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2541068A1 EP2541068A1 (en) | 2013-01-02 |
EP2541068B1 true EP2541068B1 (en) | 2016-08-10 |
Family
ID=45044776
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11171974.6A Active EP2541068B1 (en) | 2011-06-29 | 2011-06-29 | Axial ventilator with flow guidance body |
Country Status (4)
Country | Link |
---|---|
US (1) | US9097261B2 (en) |
EP (1) | EP2541068B1 (en) |
CN (1) | CN102852856A (en) |
ES (1) | ES2598229T3 (en) |
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USD728090S1 (en) * | 2012-10-11 | 2015-04-28 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Electric fan |
US9835176B2 (en) | 2013-04-05 | 2017-12-05 | Acoustiflo Llc | Fan inlet air handling apparatus and methods |
CN103329876B (en) * | 2013-07-02 | 2015-08-05 | 台州市丰田喷洗机有限公司 | A kind of portable wind spraying aid type power spraye |
WO2015038879A1 (en) * | 2013-09-12 | 2015-03-19 | Evapco, Inc. | Method and apparatus for cooling tower fan mounting for removal from inside the tower |
USD771228S1 (en) * | 2013-12-30 | 2016-11-08 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Fan |
USD764652S1 (en) * | 2014-01-06 | 2016-08-23 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Diffuser grid |
USD750211S1 (en) | 2014-02-27 | 2016-02-23 | Mitsubishi Electric Corporation | Propeller fan |
DE102014111767A1 (en) * | 2014-08-18 | 2016-02-18 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Axial |
USD775321S1 (en) * | 2014-08-25 | 2016-12-27 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Ventilation grid |
DE202014105284U1 (en) * | 2014-11-04 | 2014-12-08 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Protective grille with improved efficiency and noise behavior |
USD808003S1 (en) * | 2015-01-21 | 2018-01-16 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Ventilator fan for a ventilation system |
USD814008S1 (en) * | 2015-02-02 | 2018-03-27 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Ventilator fan |
JP5828435B1 (en) * | 2015-02-03 | 2015-12-09 | 株式会社パウデック | Semiconductor element, electric device, bidirectional field effect transistor, and mounting structure |
DE202015104813U1 (en) * | 2015-09-10 | 2015-10-15 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Flow guide for arrangement on a fan |
USD810911S1 (en) * | 2015-12-04 | 2018-02-20 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Axial fan |
CN105889089A (en) * | 2016-04-11 | 2016-08-24 | 南通市宏大风机有限公司 | Axial-flow type high-speed wire cooling fan |
US10056468B2 (en) * | 2016-09-07 | 2018-08-21 | Globalfoundries Inc. | Source/drain parasitic capacitance reduction in FinFET-based semiconductor structure having tucked fins |
DE102016119916A1 (en) | 2016-10-19 | 2018-04-19 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Fan with fan wheel and stator |
US10207231B1 (en) * | 2017-02-03 | 2019-02-19 | Mistamerica, Corp. | Overhead fan misting system and method therefor |
DE102017209291A1 (en) * | 2017-06-01 | 2018-12-06 | Ziehl-Abegg Se | Fan and guide grille for a fan |
USD857878S1 (en) * | 2017-07-14 | 2019-08-27 | Arthur Blacketer | Fan protection screen |
US10876545B2 (en) * | 2018-04-09 | 2020-12-29 | Vornado Air, Llc | System and apparatus for providing a directed air flow |
USD980409S1 (en) * | 2019-03-07 | 2023-03-07 | Ziehl-Abegg Se | Fan wheel |
US11079125B2 (en) * | 2019-10-03 | 2021-08-03 | Mistamerica Corporation | Overhead fan misting system and method therefor |
CN114382708B (en) * | 2020-10-19 | 2024-02-27 | 广东美的环境电器制造有限公司 | Air supply assembly and fan |
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2011
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- 2011-06-29 EP EP11171974.6A patent/EP2541068B1/en active Active
-
2012
- 2012-06-20 US US13/528,066 patent/US9097261B2/en not_active Expired - Fee Related
- 2012-06-29 CN CN2012102262902A patent/CN102852856A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US20080219837A1 (en) * | 2007-03-06 | 2008-09-11 | Shun-Chen Chang | Fan and fan frame thereof |
Also Published As
Publication number | Publication date |
---|---|
EP2541068A1 (en) | 2013-01-02 |
ES2598229T3 (en) | 2017-01-26 |
US9097261B2 (en) | 2015-08-04 |
CN102852856A (en) | 2013-01-02 |
US20130004349A1 (en) | 2013-01-03 |
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