EP4055276B1 - Fan wheel - Google Patents

Fan wheel Download PDF

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Publication number
EP4055276B1
EP4055276B1 EP20804439.6A EP20804439A EP4055276B1 EP 4055276 B1 EP4055276 B1 EP 4055276B1 EP 20804439 A EP20804439 A EP 20804439A EP 4055276 B1 EP4055276 B1 EP 4055276B1
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EP
European Patent Office
Prior art keywords
drive
hub
fan blades
fan
wheel
Prior art date
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Active
Application number
EP20804439.6A
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German (de)
French (fr)
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EP4055276C0 (en
EP4055276A1 (en
Inventor
Karl Hägele
Markus Lechler
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IE Assets GmbH and Co KG
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IE Assets GmbH and Co KG
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Priority to SI202030432T priority Critical patent/SI4055276T1/en
Publication of EP4055276A1 publication Critical patent/EP4055276A1/en
Application granted granted Critical
Publication of EP4055276B1 publication Critical patent/EP4055276B1/en
Publication of EP4055276C0 publication Critical patent/EP4055276C0/en
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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
    • F04D25/028—Units comprising pumps and their driving means the driving means being a planetary gear
    • 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
    • F04D29/34—Blade mountings
    • F04D29/36—Blade mountings adjustable
    • 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
    • F04D29/34—Blade mountings
    • F04D29/36—Blade mountings adjustable
    • F04D29/362—Blade mountings adjustable during rotation
    • F04D29/364—The blades having only a predetermined number of possible positions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F04D19/002—Axial flow fans
    • F04D19/005—Axial flow fans reversible 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
    • F04D19/00—Axial-flow pumps
    • F04D19/002—Axial flow 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
    • F04D29/26—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
    • 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
    • F05D2260/00—Function
    • F05D2260/40—Transmission of power
    • F05D2260/403—Transmission of power through the shape of the drive components
    • F05D2260/4031—Transmission of power through the shape of the drive components as in toothed gearing
    • F05D2260/40311—Transmission of power through the shape of the drive components as in toothed gearing of the epicyclical, planetary or differential type
    • 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
    • F05D2260/00—Function
    • F05D2260/70—Adjusting of angle of incidence or attack of rotating blades
    • F05D2260/74—Adjusting of angle of incidence or attack of rotating blades by turning around an axis perpendicular the rotor centre line

Definitions

  • Fan wheels that have fan blades projecting radially from their hub and are used primarily for the purpose of cooling and cleaning heat exchanger surfaces by means of the air flow generated via the fan wheel are known.
  • a rotatable bearing in the hub of the radial fan blades which can be rotated about their blade axes, also enables the size and/or conveying direction of the respective conveying flow to be influenced by changing the respective blade angle, so that regardless of the change in the power and/or the drive speed of the associated Drive unit can be influenced in a variety of ways on the strength and / or direction of the conveyed air flow up to the reversal of the conveying direction in opposite directions, for example from bubbles to suction in relation to a respective impingement surface of a cooling surface.
  • the aforementioned fan wheels which can be driven in opposite directions of rotation, have a hub that is coaxially rotatable to the central drive and can be adjusted between stop positions for the drive with rotational play, which is rotatably mounted on the circumference of the hub, radially and - in the area between the stop positions of the hub to the drive - via a gear support for the drive around their Fan blades that can be rotated on the blade axes and the blade angle can be adjusted.
  • the invention is based on the object of switching the fan blades of the fan wheel between their corresponding positioning positions in opposite conveying directions to achieve more favorable working conditions, which result in both short changeover times and reduced component loads for the gearbox support.
  • an adjusting ring is provided on the foot side of the fan blades and concentric with the central axis of rotation of the fan wheel, which is connected to the fan blades via gear supports and which has superimposed drive connections to the fan wheel, one of which, as the first drive train, limits the angle of rotation of the fan wheel to the hub by stops in the way and the other, as the second drive train, is formed within the stop-limited adjustment range of the first drive train by a rotational support with unlimited rotational travel.
  • the gear support and the rotary connection designed as a planetary drive can be integrated into the hub and the hub in turn can be provided centrally with a support opening for receiving a guide pin for the fan wheel, which is in axial extension to the drive on the drive side, for example for the output of a drive unit , is designed so that there are good conditions for the design of a load-bearing connection of a drive unit or its output to the fan wheel as a plug-in connection.
  • the fan wheel is designated overall by 1 in the drawings and has radial fan blades 2, which are mounted in the central hub 4, which can be rotated about the axis of rotation 3 of the fan wheel 1.
  • the fan wheel 1 is supported centrally to the axis of rotation 3 on a guide pin 6 as part of a flange connection 7 of the fan wheel 1 to a drive 8, in particular a drive unit or in a corresponding manner to a drive shaft.
  • the hub 4 takes, as shown in particular in the enlarged view Fig. 4 can be seen, a central adjusting ring 10, which is rotatably supported on the guide pin 6 via a bearing ring 9, to which the fan blades 2 are in radial engagement via their foot-side ends 11 and are connected via a gear support 12, which is connected on the side of the foot-side end 11 by a bevel pinion 13 is formed, which engages an annular toothed track 14 on the part of the adjusting ring 10, corresponding to an angular drive formed by a pinion and ring gear.
  • the drive connection of the fan wheel 1 to the drive unit 8 running via the hub 4 is formed by two drive trains that work superimposed on one another with respect to the rotational position of the fan wheel 1 and the angle of rotation of the fan blades 2 guided in the hub 4 about their blade axes 5 in relation to a respective rotational position of the fan wheel 1 .
  • the first drive train works to adjust the rotation of the fan wheel 1 driven via the drive unit 8 to a predetermined angle of rotation with a stop limit and clearance
  • the second, superimposed drive train based on a rotational position of the fan wheel 1 relative to the drive 8, which is within the stop limits, determines the respective rotational position of the fan blades 1 about their blade axes 5 in the blade angle.
  • the blade angle of the fan blades 2 is thus adjusted from the second drive train to be superimposed on the first drive train.
  • the second drive train works within the clearance area of the first drive train as a rotational support of the adjusting ring 10 to the drive 8.
  • This rotational support is as a freely continuous, over the adjustment range of the adjusting ring 10 to Drive unit 8 freely running drive connection, not limited in the adjustment path.
  • this is preferably done with a planet carrier 19 which is supported in a rotationally fixed manner for the drive, for example via a non-circular connection 24, such as a hexagon, with bearing pins 20 for the planet gears 21.
  • the planet gears 21 are in engagement with a sun gear 22, which is connected to the flange connection 7, and thus to the drive unit 8 is connected in a rotationally fixed manner, for example via a non-circular connection.
  • the ring gear 23 surrounding the planet carrier 19 is supported in a fixed position on the hub 4 and rotates with it.
  • the adjusting ring 10 is controlled in its rotatability to the drive unit 8 via the planetary drive 18 with regard to the setting of the blade angle of the fan blades 2, so that when the planetary drive 18 is fixed, the rotational position of the fan blades 2 remains unchanged around its wing axes 5 in the respective clearance area of the adjusting ring 10. Fixing the rotational position of the planetary drive 18 also makes it possible within the scope of the invention to control the fan wheel 1 in accordance with the required delivery rate.
  • a control device 25 which detects and optionally also fixes the rotational position of the hub 4 of the fan wheel 1 is useful in some cases.
  • This can be formed by a scannable wheel that is rotationally fixed to the hub 4, for example a ribbed wheel 26 or the like, via which the corresponding rotational position of the fan blades 2 is detected by means of an optical or mechanical scanning device, for example by means of a rocker that is fixed in position with respect to the drive unit 8, and converted into control signals can be implemented for the air flow rate.
  • such a scanning device can also be used as an active adjusting device, for example in the form of an adjusting rocker for adjusting the fan wheel to the required delivery rates of the fan wheel 1, in order to use the scanning and / or adjusting device 27 mentioned to approach the corresponding locking points for the required air quantities and/or to set the corresponding blade positions of the fan wheel. If necessary, this can also be used for remote control.
  • a fan wheel is thereby created with a fan blades which can be rotated about their blade axes via a gear connection with an adjusting ring of a driven hub and fan blades which can be rotated in the hub, as well as adjustment of the fan blades in their blade angle via drive connections to the adjusting ring which work in a superimposed manner starting from the drive of the fan wheel, the fan wheel being used on a case-by-case basis is provided with a rotary-connected adjusting and/or scanning device for the wing angles that reaches and/or reaches the hub.

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

Description

Lüfterräder, die zu ihrer Nabe radial auskragende Lüfterflügel aufweisen und vor allem zu Zwecken der Kühlung und Reinigung von Wärmetauscherflächen mittels des jeweils über das Lüfterrad erzeugten Luftstromes eingesetzt sind, sind bekannt.Fan wheels that have fan blades projecting radially from their hub and are used primarily for the purpose of cooling and cleaning heat exchanger surfaces by means of the air flow generated via the fan wheel are known.

Dies bei Ausgestaltungen gemäß der JP S61 232303 A , DE 10 2018 106 454 A1 oder der DE 39 10 784 A , die hierzu durch Umkehr der Antriebsdrehrichtung auf entgegengesetzte Förderrichtungen umstellbar sind. Aber auch bei Ausgestaltungen gemäß der WO 2019/179562 A1 , die, gegebenenfalls kombiniert hierzu, durch Umstellung der in der Nabe um ihre radialen Flügelachsen drehbar geführten Lüfterflügel auf entgegengesetzte Förderrichtungen umstellbar sind. Ist eine Umkehr der Antriebsdrehrichtung des Lüfterrades gegeben, so kann diese durch Umstellung der Antriebsdrehrichtung des jeweiligen Antriebsaggregates, beispielsweise eines Motores erfolgen, gegebenenfalls durch Zwischenschaltung eines Umkehrgetriebes zum Antriebsaggregat.This is the case with designs according to JP S61 232303 A , DE 10 2018 106 454 A1 or the DE 39 10 784 A , which can be switched to opposite conveying directions by reversing the direction of rotation of the drive. But also with designs according to WO 2019/179562 A1 , which, if necessary combined, can be switched to opposite conveying directions by changing the fan blades, which are rotatably guided in the hub about their radial blade axes. If there is a reversal of the drive direction of rotation of the fan wheel, this can be done by changing the drive direction of rotation of the respective drive unit, for example a motor, if necessary by interposing a reversing gear to the drive unit.

Darüber hinaus ermöglicht eine in der Nabe drehbare Lagerung der radialen, um ihre Flügelachsen drehbaren Lüfterflügel auch durch Änderung des jeweiligen Flügelwinkels eine Einflussnahme auf Größe und/oder Förderrichtung des jeweiligen Förderstromes, so dass auch unabhängig von der Änderung der Leistung und/oder der Antriebsdrehzahl des zugehörigen Antriebsaggregates vielfältig auf die Stärke und/oder die Richtung des geförderten Luftstromes bis hin zur Umkehrung der Förderrichtung auf entgegengesetzte Richtungen, beispielsweise von Blasen auf Saugen in Bezug auf eine jeweilige Beaufschlagungsfläche einer Kühlfläche, Einfluss genommen werden kann.In addition, a rotatable bearing in the hub of the radial fan blades, which can be rotated about their blade axes, also enables the size and/or conveying direction of the respective conveying flow to be influenced by changing the respective blade angle, so that regardless of the change in the power and/or the drive speed of the associated Drive unit can be influenced in a variety of ways on the strength and / or direction of the conveyed air flow up to the reversal of the conveying direction in opposite directions, for example from bubbles to suction in relation to a respective impingement surface of a cooling surface.

Eingeschränkt sind diese Möglichkeiten unter anderem dadurch, dass - insbesondere bezogen auf Lüfterräder mit zur Nabe um radiale Flügelachsen drehbaren Lüfterflügeln - die Verstellbarkeit der Lüfterflügel in ihrem Flügelwinkel bis hin zu entgegengesetzten Förderrichtungen auch Abstände zwischen den Lüfterflügeln bedingt, die sowohl eine behinderungsfreie Umstellung der Lüfterflügel in ihrem Flügelwinkel zwischen den entgegengesetzten Endlagen wie auch einen hinreichenden Abstand der Lüfterflügel zueinander nötig machen. Dies unter Berücksichtigung dessen, dass üblicherweise die Verstellung der Lüfterflügel um ihre Flügelachsen über eine Getriebeabstützung erfolgt, die als Winkeltrieb zu den Fußzapfen der Lüfterflügel Antriebsritzel vorsieht, welche entsprechend der Anzahl der über den Umfang der Nabe angeordneten Lüfterflügel einer Zahnbahn entsprechend großen Durchmessers zugeordnet sind.These options are limited, among other things, by the fact that - particularly in relation to fan wheels with fan blades that can be rotated about radial blade axes in relation to the hub - the adjustability of the fan blades in their blade angle up to opposite conveying directions also requires distances between the fan blades, which ensure that the fan blades can be adjusted without hindrance their blade angle between the opposite end positions as well as a sufficient distance between the fan blades. This takes into account that the adjustment of the fan blades about their blade axes usually takes place via a gear support, which provides drive pinions as an angle drive to the foot pins of the fan blades, which are assigned to a toothed track of correspondingly large diameter in accordance with the number of fan blades arranged over the circumference of the hub.

Konstruktiv bedingen diese Gegebenheiten relativ große Übersetzungsverhältnisse zwischen den im Durchmesser kleinen Ritzeln und der antriebsseitigen, im Durchmesser großen Zahnbahn, und damit auch verhältnismäßig große zu übertragende Kräfte bezüglich der Einstellung des jeweils gewünschten Flügelwinkels für die Lüfterflügel den für die Umstellung der Lüfterflügel geforderten kurzen Zeitintervallen.Structurally, these conditions require relatively large gear ratios between the small diameter pinions and the large diameter toothed track on the drive side, and thus also relatively large forces to be transmitted with regard to the setting of the desired blade angle for the fan blades in the short time intervals required for changing the fan blades.

Konstruktiv weisen die vorgenannten in entgegengesetzten Drehrichtungen antreibbaren Lüfterräder mit zum zentralen Antrieb koaxial drehbarer sowie zwischen Anschlaglagen zum Antrieb mit Drehspiel verstellbarer Nabe umfangsseitig zur Nabe drehbar gelagerte, radiale und - im Bereich zwischen den Anschlaglagen der Nabe zum Antrieb - über eine Getriebeabstützung zum Antrieb um ihre Flügelachsen verdrehbare und in ihrem Flügelwinkel einstellbare Lüfterflügel auf. Dies bei einer Getriebeabstützung eines jeweiligen Lüfterflügels über ein zur Flügelachse konzentrisches Ritzel, das als Teil eines Winkeltriebes mit einer zum Antrieb konzentrischen Zahnbahn kämmt, wobei sich ein relativ großes Übersetzungsverhältnis der antriebsseitigen Zahnbahn zum jeweiligen flügelseitigen Ritzel, also eine Übersetzung in Schnelle ergibt. Dies im Rahmen einer anschlagbegrenzten Verdrehbarkeit des Antriebsteils zur Nabe mit entsprechend hohen Stell- und Beschleunigungskräften, insbesondere im Bereich des Umschlagens der Lüfterflügel über eine zur Drehachse des Lüfterrades senkrechte, zwischen den entgegengesetzten Förderrichtungen liegende Umschlagebene.Structurally, the aforementioned fan wheels, which can be driven in opposite directions of rotation, have a hub that is coaxially rotatable to the central drive and can be adjusted between stop positions for the drive with rotational play, which is rotatably mounted on the circumference of the hub, radially and - in the area between the stop positions of the hub to the drive - via a gear support for the drive around their Fan blades that can be rotated on the blade axes and the blade angle can be adjusted. This is the case with a transmission support of a respective fan blade via a pinion concentric to the blade axis, which, as part of an angular drive, meshes with a toothed track concentric to the drive, resulting in a relatively large transmission ratio of the drive-side toothed track to the respective blade-side pinion, i.e. a translation in speed. This is within the scope of a stop-limited rotation of the drive part to the hub with correspondingly high actuating and acceleration forces, especially in the area of the turning of the fan blades via a turning plane perpendicular to the axis of rotation of the fan wheel and lying between the opposite conveying directions.

Entsprechend den dabei wirkenden Stell- und Beschleunigungskräften ergeben sich verhältnismäßig hohe Bauteilbelastungen, die insbesondere für die Elemente der Getriebeabstützung eine entsprechend tragfähige Ausbildung bedingen, vor allem bei angestrebten, möglichst kurzen Umstellzeiten für die Lüfterflügel zwischen den entgegengesetzten Förderrichtungen.According to the actuating and acceleration forces acting, there are relatively high component loads, which require a correspondingly stable design, especially for the elements of the gearbox support, especially when the desired changeover times for the fan blades between the opposite conveying directions are as short as possible.

Der Erfindung liegt die Aufgabe zugrunde, für die Umstellung der Lüfterflügel des Lüfterrades zwischen ihren entgegengesetzten Förderrichtungen entsprechenden Stelllagen zu günstigeren Arbeitsverhältnissen zu kommen, in denen sich sowohl kurze Umstellzeiten ergeben als auch reduzierte Bauteilbelastungen für die Getriebeabstützung.The invention is based on the object of switching the fan blades of the fan wheel between their corresponding positioning positions in opposite conveying directions to achieve more favorable working conditions, which result in both short changeover times and reduced component loads for the gearbox support.

Hierzu ist überlagert, und damit parallel zur zwischen den Anschlaglagen drehwinkelbegrenzten Drehbarkeit der Nabe zum Antrieb, eine im Drehwinkel unbegrenzte, freie Drehbarkeit zwischen der Nabe und dem Antrieb gegeben, die auch zueinander gegensinnige Drehbewegungen bei drehwinkelbegrenzter Abstützung des Antriebs zur Nabe einerseits und bei im Drehwinkel unbegrenzter, frei durchlaufender Drehbarkeit der Nabe zum Antrieb ermöglicht. Dies über einen Planetentrieb mit der Folge eines gemittelten Übersetzungsverhältnisses in der Verbindung des Antriebs zur die Lüfterflügel tragenden Nabe und zu den um ihre Flügelachsen drehbaren Lüfterflügeln. Als Folge hiervon ergibt sich die Möglichkeit, die jeweiligen Getriebeelemente in der Verbindung der Lüfterflügel zum Antrieb und des Antriebs zur Nabe kosten- und herstellungsgünstig gestalten zu können.Superimposed on this, and thus parallel to the rotatability of the hub to the drive, which is limited by the rotation angle between the stop positions, there is a free rotatability between the hub and the drive, which is unlimited in the angle of rotation, which also allows rotational movements in opposite directions with a limited rotation angle of support of the drive to the hub on the one hand and in the angle of rotation unlimited, freely rotating rotation of the hub to the drive. This is done via a planetary drive with the result of an average gear ratio in the connection of the drive to the hub carrying the fan blades and to the fan blades that can be rotated about their blade axes. As a result of this, it is possible to design the respective gear elements in the connection of the fan blades to the drive and the drive to the hub in a cost-effective and manufacturing-efficient manner.

Für die zur Nabe radialen, um ihre Flügelachsen drehbar geführten und in ihrem Flügelwinkel einstellbaren Lüfterflügeln ist ein zu den Lüfterflügeln fußseitiger, zur zentralen Drehachse des Lüfterrades konzentrischer Stellring vorgesehen, der über Getriebeabstützungen mit den Lüfterflügeln verbunden ist und der überlagert arbeitende Antriebsverbindungen zum Lüfterrad aufweist, von denen eine als erster Antriebsstrang den Drehwinkel des Lüfterrades zur Nabe durch Anschläge im Weg begrenzt und die andere, als zweiter Antriebsstrang innerhalb des anschlagbegrenzten Stellbereiches des ersten Antriebsstranges durch eine im Drehweg unbegrenzte Drehabstützung gebildet ist.For the fan blades that are radial to the hub, rotatably guided about their blade axes and whose blade angle can be adjusted, an adjusting ring is provided on the foot side of the fan blades and concentric with the central axis of rotation of the fan wheel, which is connected to the fan blades via gear supports and which has superimposed drive connections to the fan wheel, one of which, as the first drive train, limits the angle of rotation of the fan wheel to the hub by stops in the way and the other, as the second drive train, is formed within the stop-limited adjustment range of the first drive train by a rotational support with unlimited rotational travel.

Die Getriebeabstützung und die im Drehwinkel unbegrenzte, als Planetentrieb gestaltete Drehverbindung können integriert zur Nabe vorgesehen und die Nabe ihrerseits kann zentral mit einer Tragöffnung für die Aufnahme eines Führungszapfens für das Lüfterrad versehen werden, der in axialer Verlängerung zum antriebsseitigen Antrieb, beispielsweise zum Abtrieb eines Antriebsaggregates, ausgebildet ist, so dass gute Voraussetzungen für die Gestaltung einer tragenden Verbindung eines Antriebsaggregates oder dessen Abtriebes zum Lüfterrad als Steckverbindung gegeben sind.The gear support and the rotary connection designed as a planetary drive, which has no rotation angle, can be integrated into the hub and the hub in turn can be provided centrally with a support opening for receiving a guide pin for the fan wheel, which is in axial extension to the drive on the drive side, for example for the output of a drive unit , is designed so that there are good conditions for the design of a load-bearing connection of a drive unit or its output to the fan wheel as a plug-in connection.

Weitere Einzelheiten und Merkmale der Erfindung sind der nachfolgenden Beschreibung und den zugehörigen Zeichnungen zu entnehmen. Es zeigen im Einzelnen:

Fig. 1
eine stirnseitige Ansicht eines zentralen, zu einem Antrieb abgestützten und mit dem Antrieb verbundenen Lüfterrades mit zu dessen Nabe radialen Lüfterflügeln, die um ihre Flügelachsen zur Nabe verdrehbar abgestützt mit dem Antrieb verbunden sind,
Fig. 2
einen zentralen Schnitt A-A durch das Lüfterrad mit dessen zentraler Nabe,
Fig. 3
einen Schnitt B-B durch den Nabenbereich des Lüfterrades, und
Fig. 4
eine dem Schnitt B-B entsprechende, vergrößerte Darstellung des Nabenbereiches mit den über diesen laufenden Antriebsverbindungen für den Drehantrieb der Nabe und den zur Nabe drehbar gelagerten und in ihrem Flügelwinkel einstellbaren Lüfterflügeln.
Further details and features of the invention can be found in the following description and the associated drawings. They show in detail:
Fig. 1
a front view of a central fan wheel, which is supported to form a drive and connected to the drive, with fan blades radial to its hub, which are connected to the drive and supported in a rotatable manner about their blade axes relative to the hub,
Fig. 2
a central section AA through the fan wheel with its central hub,
Fig. 3
a section BB through the hub area of the fan wheel, and
Fig. 4
an enlarged view of the hub area corresponding to section BB with the drive connections for the rotary drive running over it Hub and the fan blades, which are rotatably mounted to the hub and whose blade angle can be adjusted.

Das Lüfterrad ist in den Zeichnungen insgesamt mit 1 bezeichnet und weist radiale Lüfterflügel 2 auf, die in der zentralen, um die Drehachse 3 des Lüfterrades 1 drehbaren Nabe 4 gelagert sind. Abgestützt ist das Lüfterrad 1 zentral zur Drehachse 3 auf einem Führungszapfen 6 als Teil einer Flanschverbindung 7 des Lüfterrades 1 zu einem Antrieb 8, insbesondere einem Antriebsaggregat oder in korrespondierender Weise zu einer Antriebswelle.The fan wheel is designated overall by 1 in the drawings and has radial fan blades 2, which are mounted in the central hub 4, which can be rotated about the axis of rotation 3 of the fan wheel 1. The fan wheel 1 is supported centrally to the axis of rotation 3 on a guide pin 6 as part of a flange connection 7 of the fan wheel 1 to a drive 8, in particular a drive unit or in a corresponding manner to a drive shaft.

Die Nabe 4 nimmt, wie insbesondere in der vergrößerten Darstellung gemäß Fig. 4 ersichtlich, einen zentralen, auf dem Führungszapfen 6 über einen Lagerring 9 drehbar abgestützten Stellring 10 auf, zu dem die Lüfterflügel 2 über ihre fußseitigen Enden 11 in radialem Eingriff stehen und über eine Getriebeabstützung 12 verbunden sind, die seitens des fußseitigen Endes 11 durch ein Kegelritzel 13 gebildet ist, das zu einer ringförmigen Zahnbahn 14 seitens des Stellringes 10 in Eingriff steht, entsprechend einem durch Ritzel und Tellerrad gebildeten Winkeltrieb.The hub 4 takes, as shown in particular in the enlarged view Fig. 4 can be seen, a central adjusting ring 10, which is rotatably supported on the guide pin 6 via a bearing ring 9, to which the fan blades 2 are in radial engagement via their foot-side ends 11 and are connected via a gear support 12, which is connected on the side of the foot-side end 11 by a bevel pinion 13 is formed, which engages an annular toothed track 14 on the part of the adjusting ring 10, corresponding to an angular drive formed by a pinion and ring gear.

Die über die Nabe 4 laufende Antriebsverbindung des Lüfterrades 1 zum Antriebsaggregat 8 ist bezüglich der Drehstellung des Lüfterrades 1 und des Drehwinkels der in der Nabe 4 geführten Lüfterflügel 2 um ihre Flügelachsen 5 bezogen auf eine jeweilige Drehstellung des Lüfterrades 1 durch zwei überlagert zueinander arbeitende Antriebsstränge gebildet. Von diesen arbeitet der erste Antriebsstrang zur Drehverstellung des über das Antriebaggregat 8 angetriebenen Lüfterrades 1 auf einen vorgegebenen Drehwinkel anschlagbegrenzt mit Freigang, und der zweite, hierzu überlagernd arbeitende Antriebsstrang, bezogen auf eine jeweils innerhalb der Anschlaggrenzen liegende Drehstellung des Lüfterrades 1 zum Antrieb 8, die jeweilige Drehlage der Lüfterflügel 1 um ihre Flügelachsen 5 im Flügelwinkel bestimmend. Damit wird der Flügelwinkel der Lüfterflügel 2 vom zweiten Antriebsstrang überlagernd zum ersten Antriebsstrang eingestellt.The drive connection of the fan wheel 1 to the drive unit 8 running via the hub 4 is formed by two drive trains that work superimposed on one another with respect to the rotational position of the fan wheel 1 and the angle of rotation of the fan blades 2 guided in the hub 4 about their blade axes 5 in relation to a respective rotational position of the fan wheel 1 . Of these, the first drive train works to adjust the rotation of the fan wheel 1 driven via the drive unit 8 to a predetermined angle of rotation with a stop limit and clearance, and the second, superimposed drive train, based on a rotational position of the fan wheel 1 relative to the drive 8, which is within the stop limits, determines the respective rotational position of the fan blades 1 about their blade axes 5 in the blade angle. The blade angle of the fan blades 2 is thus adjusted from the second drive train to be superimposed on the first drive train.

Konstruktiv ist dies dadurch erreicht, dass die Drehstellung des die fußseitigen Enden der Lüfterflügel 2 aufnehmenden, radial äußeren Bereiches der Nabe 4 gegen den Stellring 10 in der Verbindung des Stellringes 10 zur Nabe im Stellweg anschlagbegrenzt ist und der Stellring 10 sich in Umfangsrichtung erstreckende Führungsbahnen 15 aufweist, in die zur Begrenzung des Verstellbereiches auf die Länge der Führungsbahnen 15 zur Nabe 4 lagefeste Anschlagbolzen 16 eingreifen.Structurally, this is achieved in that the rotational position of the radially outer region of the hub 4, which accommodates the foot-side ends of the fan blades 2, is limited in the positioning path against the adjusting ring 10 in the connection of the adjusting ring 10 to the hub and the adjusting ring 10 has guide tracks 15 extending in the circumferential direction has, into which position-fixed stop bolts 16 engage to limit the adjustment range to the length of the guide tracks 15 to the hub 4.

Parallel zu einem solchen oder auch andersartig gestalteten ersten Antriebsstrang arbeitet, insgesamt eine Antriebsverbindung 17 bildend, der zweite Antriebsstrang innerhalb des Freigangbereiches des ersten Antriebsstranges als Drehabstützung des Stellringes 10 zum Antrieb 8. Diese Drehabstützung ist als frei durchlaufende, über den Verstellbereich des Stellringes 10 zum Antriebsaggregat 8 frei durchlaufende, im Verstellweg nicht begrenzte Antriebsverbindung gestaltet. Dies erfindungsgemäß bevorzugt mit einem zum Antrieb drehfest beispielsweise über eine Unrundverbindung 24, wie einen Sechskant abgestützten Planetenträger 19 mit Lagerzapfen 20 für die Planetenräder 21. Die Planetenräder 21 stehen zu einem Sonnenrad 22 in Eingriff, das zur Flanschverbindung 7, und damit zum Antriebsaggregat 8 drehfest, beispielsweise wiederum über eine Unrundverbindung, verbunden ist. Das zum Planetenträger 19 umschließende Hohlrad 23 ist an der Nabe 4 lagefest abgestützt und dreht sich mit dieser. Somit wird über den Planetentrieb 18 innerhalb der anschlagbegrenzten Verdrehbarkeit der Nabe 4 zum Stellring 10 der Stellring 10 in seiner Verdrehbarkeit zum Antriebsaggregat 8 über den Planetentrieb 18 hinsichtlich der Einstellung des Flügelwinkels der Lüfterflügel 2 gesteuert, so dass bei Fixierung des Planetentriebes 18 die Drehstellung der Lüfterflügel 2 um ihre Flügelachsen 5 im jeweiligen Freigangbereich des Stellringes 10 unverändert bleibt. Eine Fixierung der Drehlage des Planetentriebes 18 ermöglicht im Rahmen der Erfindung zudem auch eine Steuerung des Lüfterrades 1 entsprechend einer jeweils geforderten Förderleistung.Parallel to such a or differently designed first drive train, forming a total drive connection 17, the second drive train works within the clearance area of the first drive train as a rotational support of the adjusting ring 10 to the drive 8. This rotational support is as a freely continuous, over the adjustment range of the adjusting ring 10 to Drive unit 8 freely running drive connection, not limited in the adjustment path. According to the invention, this is preferably done with a planet carrier 19 which is supported in a rotationally fixed manner for the drive, for example via a non-circular connection 24, such as a hexagon, with bearing pins 20 for the planet gears 21. The planet gears 21 are in engagement with a sun gear 22, which is connected to the flange connection 7, and thus to the drive unit 8 is connected in a rotationally fixed manner, for example via a non-circular connection. The ring gear 23 surrounding the planet carrier 19 is supported in a fixed position on the hub 4 and rotates with it. Thus, within the stop-limited rotatability of the hub 4 to the adjusting ring 10, the adjusting ring 10 is controlled in its rotatability to the drive unit 8 via the planetary drive 18 with regard to the setting of the blade angle of the fan blades 2, so that when the planetary drive 18 is fixed, the rotational position of the fan blades 2 remains unchanged around its wing axes 5 in the respective clearance area of the adjusting ring 10. Fixing the rotational position of the planetary drive 18 also makes it possible within the scope of the invention to control the fan wheel 1 in accordance with the required delivery rate.

Hierzu ist bezogen auf die Erfindung, und das vorstehend erläuterte Ausführungsbeispiel ergänzend eine die Drehlage der Nabe 4 des Lüfterrades 1 erfassende und gegebenenfalls auch fixierende Steuereinrichtung 25 fallweise zweckmäßig. Diese kann durch ein zur Nabe 4 drehfestes, abtastbares Rad, beispielsweise ein Rippenrad 26 oder dergleichen, gebildet sein, über das die hierzu korrespondierende Drehstellung der Lüfterflügel 2 mittels einer optischen oder mechanischen Abtasteinrichtung, beispielsweise mittels einer zum Antriebsaggregat 8 lagefesten Wippe erfasst und in Steuersignale für die Luftfördermenge umgesetzt werden kann.For this purpose, in relation to the invention and the exemplary embodiment explained above, a control device 25 which detects and optionally also fixes the rotational position of the hub 4 of the fan wheel 1 is useful in some cases. This can be formed by a scannable wheel that is rotationally fixed to the hub 4, for example a ribbed wheel 26 or the like, via which the corresponding rotational position of the fan blades 2 is detected by means of an optical or mechanical scanning device, for example by means of a rocker that is fixed in position with respect to the drive unit 8, and converted into control signals can be implemented for the air flow rate.

Weiterführend kann eine solche Abtasteinrichtung auch als aktive Stelleinrichtung zum Beispiel in Form einer Stellwippe für die Einstellung des Lüfterrades auf jeweils geforderte Fördermengen des Lüfterrades 1 genutzt werden, um mithilfe der angesprochenen Abtast- und/oder Stelleinrichtung 27 jeweils geforderten Luftmengen entsprechende Rastpunkte anzufahren und/oder diesen entsprechende Flügelstellungen des Lüfterrades einzustellen. Dies kann gegebenenfalls auch für eine Fernbetätigung genutzt werden.Furthermore, such a scanning device can also be used as an active adjusting device, for example in the form of an adjusting rocker for adjusting the fan wheel to the required delivery rates of the fan wheel 1, in order to use the scanning and / or adjusting device 27 mentioned to approach the corresponding locking points for the required air quantities and/or to set the corresponding blade positions of the fan wheel. If necessary, this can also be used for remote control.

Insgesamt ist dadurch ein Lüfterrad geschaffen mit einer über eine Getriebeverbindung mit einem Stellring einer angetriebener Nabe und in der Nabe um ihre Flügelachsen drehbaren Lüfterflügeln sowie Einstellung der Lüfterflügel in ihrem Flügelwinkel über ausgehend vom Antrieb des Lüfterrades zueinander überlagernd arbeitende Antriebsverbindungen zum Stellring, wobei das Lüfterrad fallweise mit einer zur Nabe an- und/oder abgreifenden drehverbundenen Stell- und/oder Abtasteinrichtung für die Flügelwinkel versehen ist.Overall, a fan wheel is thereby created with a fan blades which can be rotated about their blade axes via a gear connection with an adjusting ring of a driven hub and fan blades which can be rotated in the hub, as well as adjustment of the fan blades in their blade angle via drive connections to the adjusting ring which work in a superimposed manner starting from the drive of the fan wheel, the fan wheel being used on a case-by-case basis is provided with a rotary-connected adjusting and/or scanning device for the wing angles that reaches and/or reaches the hub.

Claims (4)

  1. A fan wheel (1) with a hub (4) which is centrally supported with respect to a drive (8) and coaxially rotatable therewith between stops relative to the hub (4) and with fan blades (2) extending radially from the hub (4) over its circumference and being supported in the hub (4) so as to be rotatable in a range delimited by stops (15, 16) of the hub (4) relative to the drive (8), with the fan blades being rotatable about the blade axes (5) for an adjustment of the angle of the fan blades (2), whereas overlaying the rotational support between the stop limits (15, 16) of the hub (4) for the drive (8), a rotational support (19, 22) between the hub (4) and the drive (8) with unlimited rotational angle is provided, which is formed by a planetary drive (18) whose planet carrier (19) is fixed to the control ring (10) and whose hollow wheel (23) with a gear structure surrounding the sun wheel (22) being arranged adjacent the hub (4) of the fan wheel (1) at the side thereof.
  2. The fan wheel according to Claim 1, characterized in that the first angularly limited rotational drive connection is formed by a stop-delimited guide path (15) within the control ring (10) and a stop bolt (16) fixed to the drive (8) and extending into the guide track (15).
  3. The fan wheel according to one of the preceding claims, characterized in that the fan blades (2) are engaged with the control ring (10) via a miter wheel gearing with pinions (13) provided at the foot ends of the fan blades (2) and engaged by a gear rack (14) provided on the control ring (10).
  4. The fan wheel according to one of the preceding claims, wherein the positions of the fan blades (2) relative to the drive (8) are adjustable via a control and/or sensor arrangement (27) operating in a control and/or sensing mode.
EP20804439.6A 2019-12-18 2020-11-11 Fan wheel Active EP4055276B1 (en)

Priority Applications (1)

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SI202030432T SI4055276T1 (en) 2019-12-18 2020-11-11 Fan wheel

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DE102019134887.0A DE102019134887A1 (en) 2019-12-18 2019-12-18 Fan wheel
PCT/EP2020/025503 WO2021121648A1 (en) 2019-12-18 2020-11-11 Fan wheel

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EP4055276A1 EP4055276A1 (en) 2022-09-14
EP4055276B1 true EP4055276B1 (en) 2024-02-21
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US (1) US11708836B2 (en)
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JP (1) JP7496633B2 (en)
KR (1) KR102719297B1 (en)
CN (1) CN113677896B (en)
CA (1) CA3157977A1 (en)
CL (1) CL2022001637A1 (en)
DE (1) DE102019134887A1 (en)
ES (1) ES2985876T3 (en)
HU (1) HUE067211T2 (en)
MX (1) MX2022007489A (en)
PE (1) PE20221606A1 (en)
PL (1) PL4055276T3 (en)
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DE102023119250A1 (en) 2023-07-20 2025-01-23 Ie Assets Gmbh & Co. Kg fan wheel
DE102024120215B3 (en) * 2024-07-17 2025-07-31 Ie Assets Gmbh & Co. Kg Reversible fans and operating procedures

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KR20220092947A (en) 2022-07-04
CA3157977A1 (en) 2021-06-24
PE20221606A1 (en) 2022-10-10
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JP2023529245A (en) 2023-07-10
US11708836B2 (en) 2023-07-25
US20220099098A1 (en) 2022-03-31
CN113677896B (en) 2023-11-07
CN113677896A (en) 2021-11-19
HUE067211T2 (en) 2024-10-28
SI4055276T1 (en) 2024-12-31
CL2022001637A1 (en) 2023-02-24
MX2022007489A (en) 2022-09-02
JP7496633B2 (en) 2024-06-07
KR102719297B1 (en) 2024-10-18
PL4055276T3 (en) 2024-09-16
EP4055276C0 (en) 2024-02-21
ES2985876T3 (en) 2024-11-07
DE102019134887A1 (en) 2021-06-24
EP4055276A1 (en) 2022-09-14

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