EP3916239A1 - Fan wheel with three-dimensionally curved impeller blades - Google Patents
Fan wheel with three-dimensionally curved impeller blades Download PDFInfo
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- EP3916239A1 EP3916239A1 EP21172988.4A EP21172988A EP3916239A1 EP 3916239 A1 EP3916239 A1 EP 3916239A1 EP 21172988 A EP21172988 A EP 21172988A EP 3916239 A1 EP3916239 A1 EP 3916239A1
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- 230000007704 transition Effects 0.000 claims abstract description 15
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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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
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
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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
- F04D29/28—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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/70—Shape
- F05D2250/71—Shape curved
Definitions
- the invention relates to an impeller with three-dimensionally curved impeller blades.
- Fan wheels with impeller blades curved forwards or backwards with respect to the direction of rotation and impeller blades curved with respect to the axis of rotation of the impeller are known, for example from the publication DE 10 2017 114 679 A1 .
- the fan wheel presented here is used for volume flow-conducting elements, such as so-called air handling units, in the field of ventilation and air conditioning technology.
- the strength and in particular the speed stability play a decisive role.
- a critical point is the material stress at the transition between the respective impeller blades of the fan wheel and the bottom disk and / or the cover disk. In the prior art, radii are often provided in the transition area to ensure the speed stability.
- the invention is based on the object of further optimizing the previous solutions of the fan wheels with regard to their efficiency, the generation of noise and the possibility of even higher speeds.
- a fan wheel is proposed with a bottom disk, a cover disk and impeller blades arranged around an axis of rotation of the fan wheel, each of which extends over a blade length from a blade leading edge to a blade trailing edge.
- the impeller blades are divided into a front section that extends from the front edge of the blade towards the rear edge of the blade, a rear section that extends from the rear edge of the blade in the direction of the front edge of the blade, and a transition section that forms a transition between the front section and the rear section .
- the impeller blades in the front section and the rear section are curved in opposite directions in the course from the bottom disk to the cover disk.
- One embodiment of the fan wheel is characterized in that the impeller blades in the front section and the rear section are designed to be opposite to a shortest connection between the bottom disk and the cover disk, in particular curved three-dimensionally.
- the impeller blades are curved in an arc shape.
- the arc course is preferably carried out with one constant or substantially constant arc radius.
- An embodiment of the impeller is also favorable in which the front section extends over at least 5%, preferably over 10-40% of the blade length. In the same way, it is advantageous that the rear section extends over at least 5%, preferably over 10-40% of the blade length.
- the transition section connects the front section and the rear section.
- the transition takes place in a steady course along the length of the blade.
- the alternation of the curvature of the front section and the rear section, i.e. the opposite curvature in the front section and the rear section, is preferably realized in the transition section by a uniform course.
- An exemplary embodiment of the impeller which is advantageous in terms of flow technology preferably provides that the front section is designed to be curved towards the axis of rotation and the rear section to be curved away from the axis of rotation.
- the bottom disk also preferably has a hub on which the impeller blades are attached or formed.
- the hub forms an interface to the motor and is either formed in one piece by the bottom disk or arranged on it.
- the fan wheel has the cover disk, which covers axial front edges of the impeller blades at least in sections, in particular completely.
- the cover disk then forms the axial suction opening of the fan wheel.
- a further development of the impeller is characterized in that the impeller blades end radially inwardly at a distance (R) on the bottom disk that is at least 5% of a total diameter (D) of the bottom disk, so that R / D> 0.05 applies, a more preferred range is between 5-25%, more preferably between 10-15%.
- the impeller blades therefore end clearly set back from the radial outer edge of the bottom disk, so that the flow rests against the bottom disk over a longer distance.
- the impeller is characterized in that the bottom disk has an elliptical cross section on its radial outer edge section, so that its radial outer edge runs parallel or essentially parallel to the axis of rotation.
- the cover disk also has a radially inner section which defines an axial extension parallel to the axis of rotation.
- the impeller blades do not rest against the axially extending section.
- the cover disk then continues in particular in the radial direction and the impeller blades are overextended against it.
- an embodiment of the cover disk is advantageous in which, viewed in a lateral cross section, it has an at least sectionally curved course and defines an axial change of direction at its radial outer edge section.
- impeller blades In an advantageous embodiment of the impeller, provision is also made for the impeller blades to extend radially outward and around the axis of rotation from the blade leading edge to the blade trailing edge.
- the impeller blades are therefore curved forwards or backwards with respect to the direction of rotation.
- the impeller according to the invention is designed in particular as a radial impeller or diagonal impeller.
- the fan wheel is preferably made from one piece, in particular from plastic.
- impellers made of metal, in particular made of sheet metal, are also possible.
- the Figures 1 and 2 show perspective views of the impeller 1 in an embodiment as a one-piece radial impeller with a bottom disk 4, a cover disk 3 determining the suction opening 25 and between the bottom disk 4 and the cover disk 3 in a blade ring arranged so as to be curved backwards about the axis of rotation RA.
- the impeller blades 2 run from a hub 9 formed by the bottom disk 4 from their inlet-side blade leading edge 5 in the circumferential direction and radially outward to their outlet-side blade trailing edge 6. In operation, the flow is axial through the suction port 25 sucked in and blown out radially through the channels formed between the impeller blades 2.
- each of the impeller blades 2 has three sections, namely the leading section 10, which extends from the vane leading edge 5 in the direction of the vane trailing edge 6, the trailing section 12, which extends from the vane trailing edge 6 in Direction of the blade leading edge 5 extends, and the transition section 11, which forms the transition between the front section 10 and the rear section 12.
- the front section 10 is through the section in Figure 3 , the rear section through the cut in Figure 4 clearly visible.
- the impeller blades 2 are curved three-dimensionally in opposite directions from the bottom disk 4 to the cover disk 3 in relation to the axis of rotation RA.
- the shortest connection in each case between the bottom disk 4 and the cover disk 3 is indicated by the straight lines 8, 8 ', so that the curvature can be better grasped.
- the arcuate curvature takes place in such a way that the impeller blades 2 in the front section 10 and the rear section 12 are designed to be oppositely three-dimensionally curved, the curvature in the exemplary embodiment shown in the front section 10 towards the axis of rotation (see FIG Figure 3 ) and in the rear section 12 away from the axis of rotation (see Figure 4 ) he follows.
- the curvature towards and away from the axis of rotation RA can also be reversed.
- the impeller blades 2 merge both into the bottom disk 4 and into the cover disk 3 at an angle to the axis of rotation. Together with the bottom disk 4, the impeller blades 2 thus each form V-shaped connection areas 18, 18 'in the front section 10 and rear section 12 in lateral cross-section, the opening angle between the respective The impeller blade 2 and the bottom disk 4 of the connection area 18 ′ in the rear section 12 is significantly smaller than that of the connection area 18 in the front section 10.
- the front section 10 and the rear section 12 each extend over approx. 30% of the total blade length, the transition section 11 between them determines the rest takes place from the front section 10 to the rear section 12 along the blade length uniformly over the entire axial height of the impeller blades 2 and without a jump.
- FIG. 1 shows the distance R between the blade trailing edge 6 and the outer radius of the bottom disk 4.
- both the cover plate 3 and the bottom plate 4 are specially shaped.
- the cover disk 3 viewed from radially inside to radially outside, initially has the section 21 which extends axially parallel to the axis of rotation RA and defines the suction opening 25. This is followed, seen in the lateral cross section, by an arcuately curved course that covers the impeller blades 2 and merges again in the radial outer edge section 23 like a winglet into the axial direction parallel to the axis of rotation RA.
- the cover disk 3 consequently undergoes a complete axial change of direction over its radial extent.
- the outer edge portion 23 is adjacent to the impeller blades 2, as shown in FIG Figure 4 can be seen.
- the bottom disk 4 has an elliptical cross section at its radial outer edge section 22 and changes from an extension radially outward into an axial extension so that the radial outer edge of the bottom disk 4 runs parallel or essentially parallel to the axis of rotation RA.
- the embodiment of the invention is not limited to the exemplary embodiment specified above. Rather, the variants also described can be applied accordingly to the embodiment according to the figures, for example the opposite curvature of the impeller blades in the rear section adjacent to the blade rear edge towards the axis of rotation and in the front section adjacent to the blade front edge away from the axis of rotation.
- Alternative shapes of bottom disks and / or cover disks can also be used.
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Die Erfindung betrifft ein Gebläserad (1) mit einer Bodenscheibe (4), einer Deckscheibe (3) und um eine Rotationsachse (RA) des Gebläserads (1) angeordneten Laufradschaufeln (2), die sich jeweils über eine Schaufellänge von einer Schaufelvorderkante (5) zu einer Schaufelhinterkante (6) erstrecken, wobei die Laufradschaufeln (2) aufgeteilt sind in einen Vorderabschnitt (10), der sich ausgehend von der Schaufelvorderkante (5) in Richtung der Schaufelhinterkante (6) erstreckt, einen Hinterabschnitt (12), der sich ausgehend von der Schaufelhinterkante (6) in Richtung der Schaufelvorderkante (5) erstreckt, und einen Übergangsabschnitt (11), der einen Übergang zwischen dem Vorderabschnitt (10) und dem Hinterabschnitt (12) bildet, und wobei die Laufradschaufeln (2) im Verlauf von der Bodenscheibe (4) zur Deckscheibe (3) in dem Vorderabschnitt (10) und dem Hinterabschnitt (12) entgegengesetzt gekrümmt ausgebildet sind.The invention relates to an impeller (1) with a bottom disc (4), a cover disc (3) and impeller blades (2) arranged around an axis of rotation (RA) of the impeller (1), each of which extends over a blade length from a blade leading edge (5). to a blade trailing edge (6), the impeller blades (2) being divided into a front section (10), which extends from the blade leading edge (5) in the direction of the blade trailing edge (6), and a rear section (12) which extends from extends from the blade trailing edge (6) in the direction of the blade leading edge (5), and a transition section (11) which forms a transition between the front section (10) and the rear section (12), and wherein the impeller blades (2) in the course of the The bottom disk (4) is designed to be curved in opposite directions to the cover disk (3) in the front section (10) and the rear section (12).
Description
Die Erfindung betrifft ein Gebläserad mit dreidimensional gekrümmten Laufradschaufeln.The invention relates to an impeller with three-dimensionally curved impeller blades.
Aus dem Stand der Technik sind Gebläseräder mit gegenüber der Drehrichtung vorwärtsgekrümmten oder rückwärtsgekrümmten Laufradschaufeln sowie gegenüber der Rotationsachse des Gebläserads gekrümmten Laufradschaufeln bekannt, beispielsweise aus der Druckschrift
Das vorliegend vorgestellte Gebläserad dient zum Einsatz bei volumenstromleitenden Elementen, z.B. sogenannten Air Handling Units, im Bereich der Lüftungs- und Klimatechnik. Dabei spielen die Festigkeit und insbesondere die Drehzahlfestigkeit eine entscheidende Rolle. Ein kritischer Punkt ist die Materialbeanspruchung am Übergang zwischen der jeweiligen Laufradschaufel des Gebläserads und der Bodenscheibe und/oder der Deckscheibe. Zur Sicherstellung der Drehzahlfestigkeit werden im Stand der Technik häufig Radien im Übergangsbereich vorgesehen.The fan wheel presented here is used for volume flow-conducting elements, such as so-called air handling units, in the field of ventilation and air conditioning technology. The strength and in particular the speed stability play a decisive role. A critical point is the material stress at the transition between the respective impeller blades of the fan wheel and the bottom disk and / or the cover disk. In the prior art, radii are often provided in the transition area to ensure the speed stability.
Der Erfindung liegt die Aufgabe zugrunde, die bisherigen Lösungen der Gebläseräder hinsichtlich ihres Wirkungsgrades, der Geräuschentwicklung und der Ermöglichung noch höherer Drehzahlen weiter zu optimieren.The invention is based on the object of further optimizing the previous solutions of the fan wheels with regard to their efficiency, the generation of noise and the possibility of even higher speeds.
Diese Aufgabe wird durch die Merkmalskombination gemäß Patentanspruch 1 gelöst.This object is achieved by the combination of features according to
Erfindungsgemäß wird ein Gebläserad mit einer Bodenscheibe, einer Deckscheibe und um eine Rotationsachse des Gebläserads angeordneten Laufradschaufeln vorgeschlagen, die sich jeweils über eine Schaufellänge von einer Schaufelvorderkante zu einer Schaufelhinterkante erstrecken. Die Laufradschaufeln sind dabei aufgeteilt in einen Vorderabschnitt, der sich ausgehend von der Schaufelvorderkante in Richtung der Schaufelhinterkante erstreckt, einen Hinterabschnitt, der sich ausgehend von der Schaufelhinterkante in Richtung der Schaufelvorderkante erstreckt, und einen Übergangsabschnitt, der einen Übergang zwischen dem Vorderabschnitt und dem Hinterabschnitt bildet. Die Laufradschaufeln in dem Vorderabschnitt und dem Hinterabschnitt sind im Verlauf von der Bodenscheibe zur Deckscheibe entgegengesetzt gekrümmt ausgebildet.According to the invention, a fan wheel is proposed with a bottom disk, a cover disk and impeller blades arranged around an axis of rotation of the fan wheel, each of which extends over a blade length from a blade leading edge to a blade trailing edge. The impeller blades are divided into a front section that extends from the front edge of the blade towards the rear edge of the blade, a rear section that extends from the rear edge of the blade in the direction of the front edge of the blade, and a transition section that forms a transition between the front section and the rear section . The impeller blades in the front section and the rear section are curved in opposite directions in the course from the bottom disk to the cover disk.
Eine Ausführungsvariante des Gebläserads ist dadurch gekennzeichnet, dass die Laufradschaufeln in dem Vorderabschnitt und dem Hinterabschnitt gegenüber einer kürzesten Verbindung zwischen der Bodenscheibe und der Deckscheibe entgegengesetzt, insbesondere dreidimensional gekrümmt ausgebildet sind.One embodiment of the fan wheel is characterized in that the impeller blades in the front section and the rear section are designed to be opposite to a shortest connection between the bottom disk and the cover disk, in particular curved three-dimensionally.
In einer vorteilhaften Ausgestaltung sind die Laufradschaufeln bogenförmig gekrümmt ausgebildet. Der Bogenverlauf erfolgt vorzugsweise bei einem konstanten oder im Wesentlichen konstanten Bogenradius.In an advantageous embodiment, the impeller blades are curved in an arc shape. The arc course is preferably carried out with one constant or substantially constant arc radius.
Günstig ist ferner eine Ausgestaltung des Gebläserads, bei der sich der Vorderabschnitt über mindestens 5%, vorzugsweise über 10-40% der Schaufellänge erstreckt. In gleicher Weise ist es von Vorteil, dass sich der Hinterabschnitt über mindestens 5%, vorzugsweise über 10-40% der Schaufellänge erstreckt.An embodiment of the impeller is also favorable in which the front section extends over at least 5%, preferably over 10-40% of the blade length. In the same way, it is advantageous that the rear section extends over at least 5%, preferably over 10-40% of the blade length.
Bei dem Gebläserad verbindet der Übergangsabschnitt den Vorderabschnitt und den Hinterabschnitt. Insbesondere erfolgt der Übergang dabei in einem stetigen Verlauf entlang der Schaufellänge. Der Wechsel der Krümmung des Vorderabschnitts und den Hinterabschnitts, d.h. die entgegengesetzte Krümmung im Vorderabschnitt und den Hinterabschnitt wird im Übergangsabschnitt vorzugsweise durch einen gleichförmigen Verlauf realisiert.In the case of the impeller, the transition section connects the front section and the rear section. In particular, the transition takes place in a steady course along the length of the blade. The alternation of the curvature of the front section and the rear section, i.e. the opposite curvature in the front section and the rear section, is preferably realized in the transition section by a uniform course.
Ein strömungstechnisch vorteilhaftes Ausführungsbeispiel des Gebläserads sieht vorzugsweise vor, dass der Vorderabschnitt zur Rotationsachse hin und der Hinterabschnitt von der Rotationsachse weg gekrümmt ausgebildet ist.An exemplary embodiment of the impeller which is advantageous in terms of flow technology preferably provides that the front section is designed to be curved towards the axis of rotation and the rear section to be curved away from the axis of rotation.
Bei dem Gebläserad weist die Bodenscheibe zudem vorzugsweise eine Nabe auf, an der die Laufradschaufeln befestigt oder ausgebildet sind. Die Nabe bildet eine Schnittstelle zum Motor und ist entweder einstückig durch die Bodenscheibe gebildet oder daran angeordnet.In the case of the impeller, the bottom disk also preferably has a hub on which the impeller blades are attached or formed. The hub forms an interface to the motor and is either formed in one piece by the bottom disk or arranged on it.
Ferner weist das Gebläserad die Deckscheibe auf, welche axiale Schaufelstirnkanten der Laufradschaufeln zumindest abschnittsweise, insbesondere vollständig überdeckt. Die Deckscheibe bildet dann die axiale Ansaugöffnung des Gebläserads.Furthermore, the fan wheel has the cover disk, which covers axial front edges of the impeller blades at least in sections, in particular completely. The cover disk then forms the axial suction opening of the fan wheel.
Eine Weiterbildung des Gebläserads ist dadurch gekennzeichnet, dass die Laufradschaufeln gegenüber einem Außenradius der Bodenscheibe radial einwärts in einem Abstand (R) an der Bodenscheibe enden, der mindestens 5% eines Gesamtdurchmessers (D) der Bodenscheibe bestimmt, so dass gilt R/D>0,05, ein weiter bevorzugter Bereich liegt zwischen 5-25%, weiter bevorzugt zwischen 10-15%. Die Laufradschaufeln enden mithin deutlich zurückversetzt zum radialen Außenrand der Bodenscheibe, so dass die Strömung über eine längere Strecke an der Bodenscheibe anliegt.A further development of the impeller is characterized in that the impeller blades end radially inwardly at a distance (R) on the bottom disk that is at least 5% of a total diameter (D) of the bottom disk, so that R / D> 0.05 applies, a more preferred range is between 5-25%, more preferably between 10-15%. The impeller blades therefore end clearly set back from the radial outer edge of the bottom disk, so that the flow rests against the bottom disk over a longer distance.
Ferner ist in einem Ausführungsbeispiel das Gebläserad dadurch gekennzeichnet, dass die Bodenscheibe an ihrem radialen Außenrandabschnitt einen elliptischen Querschnitt aufweist, so dass ihr radialer Außenrand parallel oder im Wesentlichen parallel zur Rotationsachse verläuft.Furthermore, in one embodiment, the impeller is characterized in that the bottom disk has an elliptical cross section on its radial outer edge section, so that its radial outer edge runs parallel or essentially parallel to the axis of rotation.
Die Deckscheibe weist in einer exemplarischen Ausgestaltung zudem einen radial innen liegenden Abschnitt auf, der eine axiale Erstreckung parallel zur Rotationsachse bestimmt. An dem sich axial erstreckenden Abschnitt liegen die Laufradschaufeln nicht an. Die Deckscheibe verläuft dann weiter in insbesondere radialer Richtung und überstreckt daran anliegend die Laufradschaufeln.In an exemplary embodiment, the cover disk also has a radially inner section which defines an axial extension parallel to the axis of rotation. The impeller blades do not rest against the axially extending section. The cover disk then continues in particular in the radial direction and the impeller blades are overextended against it.
Ferner ist eine Ausgestaltung der Deckscheibe vorteilhaft, bei der sie in einem seitlichen Querschnitt gesehen einen zumindest abschnittsweise gekrümmten Verlauf aufweist und an ihrem radialen Außenrandabschnitt einen axialen Richtungswechsel bestimmt.Furthermore, an embodiment of the cover disk is advantageous in which, viewed in a lateral cross section, it has an at least sectionally curved course and defines an axial change of direction at its radial outer edge section.
Bei dem Gebläserad ist in einer vorteilhaften Ausführung ferner vorgesehen, dass sich die Laufradschaufeln von der Schaufelvorderkante zur Schaufelhinterkante jeweils nach radial außen und um die Rotationsachse erstrecken. Die Laufradschaufeln sind mithin gegenüber der Drehrichtung vorwärtsgekrümmt oder rückwärtsgekrümmt.In an advantageous embodiment of the impeller, provision is also made for the impeller blades to extend radially outward and around the axis of rotation from the blade leading edge to the blade trailing edge. The impeller blades are therefore curved forwards or backwards with respect to the direction of rotation.
Das erfindungsgemäße Gebläserad ist insbesondere ausgebildet als Radiallaufrad oder Diagonallaufrad. Vorzugsweise ist das Gebläserad aus einem Stück, insbesondere aus Kunststoff gefertigt. Die Nutzung von mehrteiligen Laufrädern aus Metall, insbesondere aus Blech ist jedoch ebenfalls möglich.The impeller according to the invention is designed in particular as a radial impeller or diagonal impeller. The fan wheel is preferably made from one piece, in particular from plastic. The use of multi-part However, impellers made of metal, in particular made of sheet metal, are also possible.
Andere vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet bzw. werden nachstehend zusammen mit der Beschreibung der bevorzugten Ausführung der Erfindung anhand der Figuren näher dargestellt. Es zeigen:
- Fig. 1
- eine erste perspektivische Ansicht eines Gebläserads in einer Ausführung als Radiallaufrad;
- Fig. 2
- eine zweite perspektivische Ansicht des Gebläserads aus
;Figur 1 - Fig. 3
- eine erste perspektivische Schnittansicht des Gebläserads aus
;Figur 1 - Fig. 4
- eine zweite perspektivische Schnittansicht des Gebläserads aus
.Figur 1
- Fig. 1
- a first perspective view of an impeller in an embodiment as a radial impeller;
- Fig. 2
- Figure 3 is a second perspective view of the impeller
Figure 1 ; - Fig. 3
- a first perspective sectional view of the impeller from FIG
Figure 1 ; - Fig. 4
- a second perspective sectional view of the impeller from FIG
Figure 1 .
Die
Die Laufradschaufeln 2 verlaufen von einer durch die Bodenscheibe 4 gebildete Nabe 9 von ihrer einlassseitigen Schaufelvorderkante 5 in Umfangsrichtung und nach radial außen bis zu ihrer auslassseitigen Schaufelhinterkante 6. Die Deckscheibe 3 überstreckt die axialen Stirnkanten der Laufradschaufeln 2 vollständig. Im Betrieb wird die Strömung axial durch die Ansaugöffnung 25 angesaugt und radial durch die zwischen den Laufradschaufeln 2 gebildeten Kanäle ausgeblasen.The
Bezugnehmend auf die
Der Vorderabschnitt 10 und der Hinterabschnitt 12 erstrecken sich jeweils über ca. 30% der gesamten Schaufellänge, der dazwischen liegende Übergangsabschnitt 11 bestimmt den Rest. Dabei weist der Übergangsabschnitt 11 entlang der Schaufellänge einen stetigen Verlauf auf, so dass der Richtungswechsel der Krümmung der Laufradschaufeln 2 vom Vorderabschnitt 10 zum Hinterabschnitt 12 entlang der Schaufellänge gleichförmig über die gesamte axiale Höhe der Laufradschaufeln 2 und ohne Sprung erfolgt.The
Bezugnehmend auf die
Zudem sind sowohl die Deckscheibe 3 als auch die Bodenscheibe 4 speziell geformt. Die Deckscheibe 3 weist von radial innen nach radial außen gesehen zunächst den Abschnitt 21 auf, der sich axial parallel zur Rotationsachse RA erstreckt und die Ansaugöffnung 25 bestimmt. Daran schließt sich im seitlichen Querschnitt gesehen ein die Laufradschaufeln 2 überdeckender bogenförmig gekrümmter Verlauf an, der im radialen Außenrandabschnitt 23 wie eine Winglet wieder in die axiale Richtung parallel zur Rotationsachse RA übergeht. Die Deckscheibe 3 vollzieht über ihre Radialerstreckung mithin einen vollständigen axialen Richtungswechsel. Der Außenrandabschnitt 23 liegt angrenzend zu den Laufradschaufeln 2, wie es in
Die Bodenscheibe 4 hat an ihrem radialen Außenrandabschnitt 22 einen elliptischen Querschnitt und geht von einer Erstreckung nach radial außen in eine Axialerstreckung über so dass der radiale Außenrand der Bodenscheibe 4 parallel oder im Wesentlichen parallel zur Rotationsachse RA verläuft.The
Die Erfindung beschränkt sich in ihrer Ausführung nicht auf das vorstehend angegebene Ausführungsbeispiel. Vielmehr sind die ebenfalls beschriebenen Varianten in entsprechend auf die Ausführung gemäß den Figuren anwendbar, beispielsweise die entgegengesetzte Krümmung der Laufradschaufeln im Hinterabschnitt angrenzend zur Schaufelhinterkante hin zur Rotationsachse und im Vorderabschnitt angrenzend zur Schaufelvorderkante weg von der Rotationsachse. Auch können alternative Formen an Bodenscheiben und/oder Deckscheiben verwendet werden.The embodiment of the invention is not limited to the exemplary embodiment specified above. Rather, the variants also described can be applied accordingly to the embodiment according to the figures, for example the opposite curvature of the impeller blades in the rear section adjacent to the blade rear edge towards the axis of rotation and in the front section adjacent to the blade front edge away from the axis of rotation. Alternative shapes of bottom disks and / or cover disks can also be used.
Claims (15)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE102020114387.7A DE102020114387A1 (en) | 2020-05-28 | 2020-05-28 | Fan wheel with three-dimensionally curved impeller blades |
Publications (2)
Publication Number | Publication Date |
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EP3916239A1 true EP3916239A1 (en) | 2021-12-01 |
EP3916239B1 EP3916239B1 (en) | 2024-03-13 |
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EP21172988.4A Active EP3916239B1 (en) | 2020-05-28 | 2021-05-10 | Fan wheel with three-dimensionally curved impeller blades |
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Country | Link |
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US (1) | US11506220B2 (en) |
EP (1) | EP3916239B1 (en) |
CN (1) | CN113738697A (en) |
DE (1) | DE102020114387A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USD949315S1 (en) * | 2016-06-24 | 2022-04-19 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Vane damper with trailing edge |
US12038016B2 (en) * | 2019-12-09 | 2024-07-16 | Lg Electronics Inc. | Blower |
CN117345686B (en) * | 2023-12-06 | 2024-04-02 | 泛仕达机电股份有限公司 | Fan impeller with ternary twisted blades and fan |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2275689A1 (en) * | 2008-05-14 | 2011-01-19 | Daikin Industries, Ltd. | Centrifugal fan |
US20140062232A1 (en) * | 2012-08-28 | 2014-03-06 | Regal Beloit America, Inc. | Fan and electric machine assembly and methods therefor |
EP2910793A1 (en) * | 2012-10-16 | 2015-08-26 | Mitsubishi Electric Corporation | Turbo fan and air conditioner |
EP2921711A1 (en) * | 2014-03-21 | 2015-09-23 | punker GmbH | Radial fan wheel and blower unit |
DE102017114679A1 (en) | 2017-06-30 | 2019-01-03 | Ebm-Papst Mulfingen Gmbh & Co. Kg | blower |
Family Cites Families (8)
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 |
EP1455094A1 (en) * | 2003-03-04 | 2004-09-08 | Ziehl-Abegg AG | Radial flow impeller |
JP4396775B2 (en) * | 2007-11-26 | 2010-01-13 | ダイキン工業株式会社 | Centrifugal fan |
JP5829809B2 (en) * | 2008-02-22 | 2015-12-09 | ホートン, インコーポレイテッド | Hybrid flow fan device |
JP4994421B2 (en) * | 2009-05-08 | 2012-08-08 | 三菱電機株式会社 | Centrifugal fan and air conditioner |
JP5164932B2 (en) * | 2009-06-11 | 2013-03-21 | 三菱電機株式会社 | Turbofan and air conditioner |
DE102014006756A1 (en) * | 2014-05-05 | 2015-11-05 | Ziehl-Abegg Se | Impeller for diagonal or centrifugal fans, injection molding tool for producing such an impeller and device with such an impeller |
CN108884753B (en) * | 2016-03-02 | 2021-07-06 | 三菱重工发动机和增压器株式会社 | Turbine wheel, radial turbine and supercharger |
-
2020
- 2020-05-28 DE DE102020114387.7A patent/DE102020114387A1/en active Pending
-
2021
- 2021-05-10 EP EP21172988.4A patent/EP3916239B1/en active Active
- 2021-05-25 CN CN202110572741.7A patent/CN113738697A/en active Pending
- 2021-05-27 US US17/332,345 patent/US11506220B2/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2275689A1 (en) * | 2008-05-14 | 2011-01-19 | Daikin Industries, Ltd. | Centrifugal fan |
US20140062232A1 (en) * | 2012-08-28 | 2014-03-06 | Regal Beloit America, Inc. | Fan and electric machine assembly and methods therefor |
EP2910793A1 (en) * | 2012-10-16 | 2015-08-26 | Mitsubishi Electric Corporation | Turbo fan and air conditioner |
EP2921711A1 (en) * | 2014-03-21 | 2015-09-23 | punker GmbH | Radial fan wheel and blower unit |
DE102017114679A1 (en) | 2017-06-30 | 2019-01-03 | Ebm-Papst Mulfingen Gmbh & Co. Kg | blower |
Also Published As
Publication number | Publication date |
---|---|
EP3916239B1 (en) | 2024-03-13 |
CN113738697A (en) | 2021-12-03 |
US11506220B2 (en) | 2022-11-22 |
US20210372424A1 (en) | 2021-12-02 |
DE102020114387A1 (en) | 2021-12-02 |
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