EP2778428B1 - Mounting arrangement for a radial fan for a suction hood - Google Patents

Mounting arrangement for a radial fan for a suction hood Download PDF

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Publication number
EP2778428B1
EP2778428B1 EP14157261.0A EP14157261A EP2778428B1 EP 2778428 B1 EP2778428 B1 EP 2778428B1 EP 14157261 A EP14157261 A EP 14157261A EP 2778428 B1 EP2778428 B1 EP 2778428B1
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EP
European Patent Office
Prior art keywords
shaft
shoulder
fan
fan wheel
extractor hood
Prior art date
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Application number
EP14157261.0A
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German (de)
French (fr)
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EP2778428A3 (en
EP2778428A2 (en
Inventor
Robert Blaz
Ilhan GÜCLÜ
Eugen Maurer
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BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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Priority to PL14157261T priority Critical patent/PL2778428T3/en
Publication of EP2778428A2 publication Critical patent/EP2778428A2/en
Publication of EP2778428A3 publication Critical patent/EP2778428A3/en
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Publication of EP2778428B1 publication Critical patent/EP2778428B1/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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
    • 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
    • F04D29/263—Rotors specially for elastic fluids mounting fan or blower rotors on shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis

Definitions

  • the present invention relates to an extractor hood with a connection arrangement for a radial fan of this extractor hood.
  • a radial fan for an extractor hood known from the DE 90 16 767 U1 a radial fan for an extractor hood known.
  • the radial fan comprises a fan wheel and a fan motor which drives the fan wheel when the radial fan is in operation.
  • the fan motor is arranged inside the fan wheel and drives the fan wheel via a round blank which is connected to the rotor of the fan motor.
  • the JP S51 36602 A , JP S52 89703 U and FR 2 324 203 A7 each show a pump with an impeller.
  • the WO 00/57064 A1 shows a vacuum cleaner with an insulated fan wheel. Furthermore shows the GB 983,101 A a tangential fan.
  • the CN 2136952Y shows an extractor hood with a connection arrangement for the radial fan wheel.
  • One object of the present invention is to provide a connection arrangement for a radial fan of an extractor hood, which is characterized in particular by an inexpensive and compact structure.
  • a connection arrangement for a radial fan of an extractor hood with a fan wheel and a shaft is proposed.
  • the shaft is set up to drive the fan wheel.
  • the shaft has a thread and a shoulder adjoining the thread.
  • the thread is screwed into a corresponding thread on the fan wheel.
  • the shoulder engages in a corresponding shoulder of the fan wheel. Radial sections of the shoulder and the corresponding shoulder are axially in contact with one another.
  • the shaft can be provided with a smaller maximum diameter.
  • the reason for this can be seen in the fact that the fan wheel can also be centered with respect to the axis of rotation of the shaft by means of the shoulders and no separate centering section is required between the thread and the shoulder of the shaft.
  • the smaller maximum shaft diameter allows the use of smaller bearings, in particular ball bearings, for supporting the shaft or the rotor. This makes the corresponding fan motor smaller, and costs can be saved.
  • the radial fan can in particular be a double-flow radial fan.
  • the fan wheel can be composed of axially arranged blades which are held together at their respective ends by two concentric rings. Furthermore, the fan wheel can have a bell which connects the blades in a rotationally fixed manner to the shaft or a bushing.
  • the shoulder and the corresponding shoulder are preferably each designed to be rotationally symmetrical with respect to the axis of rotation.
  • the radial sections are preferably in direct contact with one another, that is, no other component or no air gap is arranged between them.
  • “Radial”, “axial” and “in the circumferential direction” refer to the axis of rotation of the shaft. “Radial” and “axial” preferably also include deviations from the radial or axial by up to 5 °.
  • the radial sections come into contact with one another when the corresponding thread of the fan wheel is completely screwed onto the thread of the shaft. By rotating further, the radial sections are then frictionally clamped against one another, so that the fan wheel is prevented from loosening automatically from the shaft.
  • the direction of rotation for screwing the fan wheel onto the shaft can be provided opposite the direction of rotation of the fan wheel when the radial fan is in operation. This ensures that the connection between the fan wheel and the shaft continues to tighten and does not loosen when the radial fan is in operation.
  • the axial sections of the shoulder and the corresponding shoulder are in radial contact with one another.
  • the fan wheel can be centered with respect to the axis of rotation of the shaft by means of the shoulders. In addition, this creates additional support for the fan wheel on the shaft.
  • the fan wheel has a socket which comprises the corresponding thread and the corresponding shoulder. At the junction High forces can occur between the fan wheel and the shaft, so that it can be advantageous to introduce them into the fan wheel by means of a bushing.
  • the bushing is formed from a different material than a bell of the fan wheel that receives the bushing.
  • the bushing can be made of a more stable material than the bell in order to be able to transmit the forces from the shaft to the fan wheel.
  • the socket is positively, non-positively and / or materially connected to the bell.
  • the socket can be held in an opening in the bell with a friction fit.
  • the sleeve can be encapsulated with the material of the bell, for example in a plastic injection molding process, whereby a material connection between the bell and the socket is produced.
  • a latching connection is provided between the socket and the bell.
  • one or more receiving elements can be arranged on a jacket surface of the bushing, which can be connected to one or more engagement elements of the bell in an elastically form-fitting manner.
  • the socket can be designed in the form of a cylinder with a circular base area.
  • the corresponding shoulder has a centering diameter which centers the fan wheel with respect to an axis of rotation of the shaft.
  • the corresponding shoulder thus has a double function: On the one hand, it ensures frictional engagement and thus secures the fan wheel on the shaft. On the other hand, it centers the fan wheel with respect to an axis of rotation of the shaft. This results in a compact structure.
  • the corresponding shoulder of the fan wheel has an insertion bevel for inserting the shoulder of the shaft into the corresponding shoulder. This results in a simple assembly.
  • the shaft has an annular groove between the thread and the shoulder. This allows the shoulder to be made easily.
  • the shaft has an assembly aid at one end for screwing the thread of the shaft into the corresponding thread of the fan wheel. This simplifies assembly of the connection arrangement.
  • the assembly aid is designed in the form of a shaft section which has a smaller diameter than the thread. An assembly aid can thereby be provided in a simple manner.
  • an extractor hood with a radial fan has a fan wheel and a fan motor. Furthermore, the radial fan comprises the connection arrangement described above, which connects a shaft of the fan motor to the fan wheel in a rotationally fixed manner.
  • the shaft is part of a rotor of the fan motor.
  • the shaft can be supported on one side of the fan wheel in two spaced apart bearings, in particular ball bearings.
  • the rotor is designed as an internal rotor. Accordingly, the stator is provided in such a way that it encompasses the rotor. Furthermore, the stator is provided in a rotationally fixed manner with respect to a motor suspension of the fan motor.
  • the radial fan is designed as a double-flow radial fan. This includes opposing axial air inlets and a tangential air outlet. The fan wheel conveys the air from the air inlets to the air outlet and applies a pressure difference to it.
  • Figure 1 shows a detail of an extractor hood 1 with a double-flow radial fan 2
  • Fig. 2 shows a section from LL Fig. 1 .
  • the radial fan 2 comprises a spiral housing 3 which is composed of two housing halves 4, 5 connected to one another.
  • a respective housing half 4, 5 has an axial air inlet 6, 9.
  • "Axial” and “radial” in the present case refer to an axis of rotation 8 of a fan motor 7 which is arranged in the interior of the housing 3 and which drives a fan wheel 11.
  • connection arrangement 10 shown connects the fan motor 7 to the fan wheel 11 for driving the same when the radial fan 2 is in operation.
  • the fan motor 7 is held on the housing half 5 by means of a motor suspension 12, in particular by means of its end shield, in such a way that it is arranged in the interior of the fan wheel 11.
  • the fan motor 7 comprises a stator 14 which is stationary with respect to the motor suspension 12 and a rotor 15 designed as an internal rotor.
  • the rotor 15 comprises a shaft 18 with the axis of rotation 8.
  • the fan wheel 11 includes blades 13 which extend axially.
  • the fan wheel 11 further comprises a bell 16 which connects the blades 13 to one another and to a bushing 17, as will be explained in more detail below with reference to FIG Figure 3 explained.
  • the bell 16 can subdivide the blades 13 axially in such a way that two separate areas are created which are each assigned to an air outlet 6 from which the air is conveyed to a tangential air outlet 21 in the housing 3, as in FIG Fig. 2 to recognize.
  • the shaft 18 of the rotor 15 is cantilevered, that is, two ball bearings 19 carry the shaft 18 to one side of the fan 11 or the bell 16, and the shaft 18 carries the fan 11 at its free end.
  • Figure 3 shows an enlarged view M from FIG Figure 2 .
  • the shaft 18 comprises at its outermost end an assembly aid 22 in the form of a stub shaft which has a smaller diameter 20 than a thread 23 of the shaft 18 adjoining the stub shaft 22.
  • the thread 23 is followed by an annular groove 24
  • Annular groove 24 is adjoined by a shoulder 25, which comprises a radial section 26 and an axial section 27.
  • the socket 17 is positively connected in the direction of rotation and in the axial direction to the bell 16 via a latching connection 31.
  • the bush 17 is designed in the form of a cylinder with a circular base surface 32.
  • a shoulder 33 corresponding to shoulder 25 is molded into cylinder or bush 17.
  • the corresponding shoulder 33 is composed of a radial section 34 and an axial section 35.
  • the socket 17 is also formed with an insertion bevel 36 towards the shoulder 33.
  • the socket 17 further comprises a thread 37 which corresponds to the thread 23 and adjoins the shoulder 33.
  • the truncated cone 22 When mounting the fan wheel 11 on the shaft 18, the truncated cone 22 is first inserted into the thread 37 from one side. Because the truncated cone 22 has a comparatively small diameter 20, this succeeds without problems.
  • the insertion bevel 36 helps that the shoulder 25 slips into the corresponding shoulder 33. Thereafter, by turning the fan wheel 11 against its direction of rotation, when the radial fan 2 is in operation, the thread 37 of the socket 17 engages with the thread 23 and is screwed onto it. From a certain point in time, the radial sections 26, 34 of the shoulders 25, 33 come into contact with one another. A further tightening ensures a frictional connection between the radial sections 26, 34.
  • the shoulder 25 is formed with a centering diameter, so that the contact between the axial sections 27, 35 of the shoulders 25, 33 ensures a centering of the fan wheel 11 with respect to the axis of rotation 8 of the shaft 18.

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

Description

Die vorliegende Erfindung betrifft eine Dunstabzugshaube mit einer Verbindungsanordnung für ein Radialgebläse dieser Dunstabzugshaube.The present invention relates to an extractor hood with a connection arrangement for a radial fan of this extractor hood.

Beispielsweise ist aus der DE 90 16 767 U1 ein Radialgebläse für eine Dunstabzugshaube bekannt. Das Radialgebläse umfasst ein Lüfterrad und einen Gebläsemotor, welcher das Lüfterrad im Betrieb des Radialgebläses antreibt. Der Gebläsemotor ist im Inneren des Lüfterrads angeordnet und treibt das Lüfterrad über eine Ronde an, welche mit dem Rotor des Gebläsemotors verbunden ist.For example, from the DE 90 16 767 U1 a radial fan for an extractor hood known. The radial fan comprises a fan wheel and a fan motor which drives the fan wheel when the radial fan is in operation. The fan motor is arranged inside the fan wheel and drives the fan wheel via a round blank which is connected to the rotor of the fan motor.

Die JP S51 36602 A , JP S52 89703 U und FR 2 324 203 A7 zeigen jeweils eine Pumpe mit einem Pumpenrad. Die WO 00/57064 A1 zeigt einen Staubsauger mit einem isolierten Lüfterrad. Weiterhin zeigt die GB 983,101 A einen Querstromventilator. Die CN 2136952Y zeigt eine Dunstabzugshaube mit einer Verbindungsanordnung für das Radialgebläserad.The JP S51 36602 A , JP S52 89703 U and FR 2 324 203 A7 each show a pump with an impeller. The WO 00/57064 A1 shows a vacuum cleaner with an insulated fan wheel. Furthermore shows the GB 983,101 A a tangential fan. The CN 2136952Y shows an extractor hood with a connection arrangement for the radial fan wheel.

Eine Aufgabe der vorliegenden Erfindung besteht darin, eine Verbindungsanordnung für ein Radialgebläse einer Dunstabzugshaube bereitzustellen, welche sich insbesondere durch einen kostengünstigen und kompakten Aufbau auszeichnet.One object of the present invention is to provide a connection arrangement for a radial fan of an extractor hood, which is characterized in particular by an inexpensive and compact structure.

Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst. Demgemäß wird eine Verbindungsanordnung für ein Radialgebläse einer Dunstabzugshaube mit einem Lüfterrad und einer Welle vorgeschlagen. Die Welle ist zum Antreiben des Lüfterrads eingerichtet. Die Welle weist ein Gewinde und eine sich an das Gewinde anschließende Schulter auf. Das Gewinde ist in ein korrespondierendes Gewinde des Lüfterrads eingeschraubt. Die Schulter greift in eine korrespondierende Schulter des Lüfterrads ein. Radiale Abschnitte der Schulter und der korrespondierenden Schulter stehen axial miteinander in Anlage.This object is achieved by the features of claim 1. Accordingly, a connection arrangement for a radial fan of an extractor hood with a fan wheel and a shaft is proposed. The shaft is set up to drive the fan wheel. The shaft has a thread and a shoulder adjoining the thread. The thread is screwed into a corresponding thread on the fan wheel. The shoulder engages in a corresponding shoulder of the fan wheel. Radial sections of the shoulder and the corresponding shoulder are axially in contact with one another.

Dadurch, dass die Schulter der Welle nicht außerhalb des Lüfterrads angeordnet, sondern in dieses hineinverlegt ist, kann die Welle mit einem kleineren maximalen Durchmesser vorgesehen werden. Der Grund hierfür ist darin zu sehen, dass eine Zentrierung des Lüfterrads bezüglich der Drehachse der Welle ebenfalls mittels der Schultern stattfinden kann und kein separater Zentrierabschnitt zwischen dem Gewinde und der Schulter der Welle benötigt wird. Der kleinere maximale Wellendurchmesser erlaubt die Verwendung kleinerer Lager, insbesondere Kugellager, zum Lagern der Welle bzw. des Rotors. Dadurch baut der entsprechende Gebläsemotor kleiner, und es lassen sich Kosten einsparen.Because the shoulder of the shaft is not arranged outside the fan wheel, but rather is placed inside it, the shaft can be provided with a smaller maximum diameter. The reason for this can be seen in the fact that the fan wheel can also be centered with respect to the axis of rotation of the shaft by means of the shoulders and no separate centering section is required between the thread and the shoulder of the shaft. The smaller maximum shaft diameter allows the use of smaller bearings, in particular ball bearings, for supporting the shaft or the rotor. This makes the corresponding fan motor smaller, and costs can be saved.

Bei dem Radialgebläse kann es sich insbesondere um ein doppelflutiges Radialgebläse handeln.The radial fan can in particular be a double-flow radial fan.

Das Lüfterrad kann sich aus axial angeordneten Schaufeln, welche an ihren jeweiligen Enden über zwei konzentrische Ringe zusammengehalten werden, zusammensetzen. Ferner kann das Lüfterrad eine Glocke aufweisen, welche die Schaufeln drehfest mit der Welle bzw. einer Buchse verbindet.The fan wheel can be composed of axially arranged blades which are held together at their respective ends by two concentric rings. Furthermore, the fan wheel can have a bell which connects the blades in a rotationally fixed manner to the shaft or a bushing.

Die Schulter und die korrespondierende Schulter sind bevorzugt jeweils rotationssymmetrisch bezüglich der Drehachse ausgebildet.The shoulder and the corresponding shoulder are preferably each designed to be rotationally symmetrical with respect to the axis of rotation.

Die radialen Abschnitte liegen bevorzugt direkt gegeneinander an, das heißt, keine andere Komponente oder auch kein Luftspalt ist zwischen diesen angeordnet.The radial sections are preferably in direct contact with one another, that is, no other component or no air gap is arranged between them.

"Radial", "axial" und "in Umfangsrichtung" bezieht sich vorliegend auf die Drehachse der Welle. Vorzugsweise umfasst "radial" und "axial" auch Abweichungen von der Radialen bzw. Axialen um bis zu 5°. Die radialen Abschnitte gelangen miteinander in Anlage, wenn das korrespondierende Gewinde des Lüfterrads vollständig auf das Gewinde der Welle aufgeschraubt ist. Durch Weiterdrehen werden dann die radialen Abschnitte reibschlüssig gegeneinander verspannt, so dass ein selbsttätiges Lösen des Lüfterrads von der Welle verhindert wird. Die Drehrichtung zum Aufschrauben des Lüfterrads auf die Welle kann dabei entgegengesetzt der Drehrichtung des Lüfterrads im Betrieb des Radialgebläses vorgesehen sein. Somit ist sichergestellt, dass sich die Verbindung zwischen Lüfterrad und Welle im Betrieb des Radialgebläses weiter festzieht und nicht löst.“Radial”, “axial” and “in the circumferential direction” refer to the axis of rotation of the shaft. "Radial" and "axial" preferably also include deviations from the radial or axial by up to 5 °. The radial sections come into contact with one another when the corresponding thread of the fan wheel is completely screwed onto the thread of the shaft. By rotating further, the radial sections are then frictionally clamped against one another, so that the fan wheel is prevented from loosening automatically from the shaft. The direction of rotation for screwing the fan wheel onto the shaft can be provided opposite the direction of rotation of the fan wheel when the radial fan is in operation. This ensures that the connection between the fan wheel and the shaft continues to tighten and does not loosen when the radial fan is in operation.

Gemäß einer Ausführungsform stehen die axialen Abschnitte der Schulter und der korrespondierenden Schulter radial in Anlage miteinander. Dadurch kann eine Zentrierung des Lüfterrads bezüglich der Drehachse der Welle mittels der Schultern bewerkstelligt werden. Außerdem wird so eine zusätzliche Abstützung des Lüfterrads an der Welle geschaffen.According to one embodiment, the axial sections of the shoulder and the corresponding shoulder are in radial contact with one another. As a result, the fan wheel can be centered with respect to the axis of rotation of the shaft by means of the shoulders. In addition, this creates additional support for the fan wheel on the shaft.

Gemäß einer weiteren Ausführungsform weist das Lüfterrad eine Buchse auf, welche das korrespondierende Gewinde und die korrespondierende Schulter umfasst. An der Verbindungsstelle zwischen Lüfterrad und Welle können hohe Kräfte auftreten, so dass es günstig sein kann, diese mittels einer Buchse in das Lüfterrad einzuleiten.According to a further embodiment, the fan wheel has a socket which comprises the corresponding thread and the corresponding shoulder. At the junction High forces can occur between the fan wheel and the shaft, so that it can be advantageous to introduce them into the fan wheel by means of a bushing.

Gemäß einer weiteren Ausführungsform ist die Buchse aus einem anderen Material gebildet als eine die Buchse aufnehmende Glocke des Lüfterrads. Somit kann die Buchse beispielsweise aus einem stabileren Material ausgebildet sein als die Glocke, um so die Kräfte aus der Welle auf das Lüfterrad übertragen zu können.According to a further embodiment, the bushing is formed from a different material than a bell of the fan wheel that receives the bushing. Thus, for example, the bushing can be made of a more stable material than the bell in order to be able to transmit the forces from the shaft to the fan wheel.

Gemäß einer weiteren Ausführungsform ist die Buchse form-, kraft- und/oder stoffschlüssig mit der Glocke verbunden. Beispielsweise kann die Buchse reibschlüssig in einer Öffnung der Glocke gehalten sein. Weiterhin kann die Buchse mit dem Material der Glocke umspritzt sein, beispielsweise in einem Kunststoffspritzgussverfahren, wodurch eine stoffschlüssige Verbindung zwischen der Glocke und der Buchse hergestellt wird.According to a further embodiment, the socket is positively, non-positively and / or materially connected to the bell. For example, the socket can be held in an opening in the bell with a friction fit. Furthermore, the sleeve can be encapsulated with the material of the bell, for example in a plastic injection molding process, whereby a material connection between the bell and the socket is produced.

Gemäß einer weiteren Ausführungsform ist eine Rastverbindung zwischen der Buchse und der Glocke vorgesehen. Beispielsweise können an einer Mantelfläche der Buchse ein oder mehrere Aufnahmeelemente angeordnet sein, welche mit ein oder mehreren Eingriffselementen der Glocke elastisch formschlüssig verbindbar sind.According to a further embodiment, a latching connection is provided between the socket and the bell. For example, one or more receiving elements can be arranged on a jacket surface of the bushing, which can be connected to one or more engagement elements of the bell in an elastically form-fitting manner.

Grundsätzlich kann die Buchse in Form eines Zylinders mit kreisringförmiger Grundfläche ausgebildet sein.In principle, the socket can be designed in the form of a cylinder with a circular base area.

Gemäß einer weiteren Ausführungsform weist die korrespondierende Schulter einen Zentrierdurchmesser auf, welcher das Lüfterrad bezüglich einer Drehachse der Welle zentriert. Somit kommt der korrespondierenden Schulter eine Doppelfunktion zu: Einerseits sorgt sie für einen Reibschluss und dadurch für eine Befestigung des Lüfterrads auf der Welle. Andererseits zentriert sie das Lüfterrad bezüglich einer Drehachse der Welle. Dadurch ergibt sich ein kompakter Aufbau.According to a further embodiment, the corresponding shoulder has a centering diameter which centers the fan wheel with respect to an axis of rotation of the shaft. The corresponding shoulder thus has a double function: On the one hand, it ensures frictional engagement and thus secures the fan wheel on the shaft. On the other hand, it centers the fan wheel with respect to an axis of rotation of the shaft. This results in a compact structure.

Gemäß einer weiteren Ausführungsform weist die korrespondierende Schulter des Lüfterrads eine Einführschräge für ein Einführen der Schulter der Welle in die korrespondierende Schulter auf. Dadurch ergibt sich eine einfache Montage.According to a further embodiment, the corresponding shoulder of the fan wheel has an insertion bevel for inserting the shoulder of the shaft into the corresponding shoulder. This results in a simple assembly.

Gemäß einer weiteren Ausführungsform weist die Welle zwischen dem Gewinde und der Schulter eine Ringnut auf. Dadurch kann die Schulter einfach hergestellt werden.According to a further embodiment, the shaft has an annular groove between the thread and the shoulder. This allows the shoulder to be made easily.

Gemäß einer weiteren Ausführungsform weist die Welle an ihrem einen Ende eine Montagehilfe für das Einschrauben des Gewindes der Welle in das korrespondierende Gewinde des Lüfterrads auf. Dadurch vereinfacht sich eine Montage der Verbindungsanordnung.According to a further embodiment, the shaft has an assembly aid at one end for screwing the thread of the shaft into the corresponding thread of the fan wheel. This simplifies assembly of the connection arrangement.

Gemäß einer weiteren Ausführungsform ist die Montagehilfe in Form eines Wellenabschnitts gebildet, welcher einen kleineren Durchmesser als das Gewinde aufweist. Dadurch kann eine Montagehilfe auf einfache Weise bereitgestellt werden.According to a further embodiment, the assembly aid is designed in the form of a shaft section which has a smaller diameter than the thread. An assembly aid can thereby be provided in a simple manner.

Erfindungsgemäß wird eine Dunstabzugshaube mit einem Radialgebläse bereitgestellt. Das Radialgebläse weist ein Lüfterrad und einen Gebläsemotor auf. Ferner umfasst das Radialgebläse die vorstehend beschriebene Verbindungsanordnung, welche eine Welle des Gebläsemotors mit dem Lüfterrad drehfest verbindet.According to the invention, an extractor hood with a radial fan is provided. The radial fan has a fan wheel and a fan motor. Furthermore, the radial fan comprises the connection arrangement described above, which connects a shaft of the fan motor to the fan wheel in a rotationally fixed manner.

Gemäß einer Ausführungsform ist die Welle Teil eines Rotors des Gebläsemotors. Die Welle kann in zwei voneinander beabstandeten Lagern, insbesondere Kugellagern, zu einer Seite des Lüfterrads gelagert sein.According to one embodiment, the shaft is part of a rotor of the fan motor. The shaft can be supported on one side of the fan wheel in two spaced apart bearings, in particular ball bearings.

Gemäß einer weiteren Ausführungsform ist der Rotor als Innenläufer ausgebildet. Entsprechend ist der Stator derart vorgesehen, dass er den Rotor umfasst. Weiter ist der Stator drehfest bezüglich einer Motoraufhängung des Gebläsemotors vorgesehen. Gemäß einer weiteren Ausführungsform ist das Radialgebläse als doppelflutiges Radialgebläse ausgebildet. Dies umfasst sich gegenüberliegende axiale Lufteinlässe sowie einen tangentialen Luftauslass. Das Lüfterrad fördert die Luft von den Lufteinlässen zum Luftauslass und beaufschlagt diese mit einer Druckdifferenz.According to a further embodiment, the rotor is designed as an internal rotor. Accordingly, the stator is provided in such a way that it encompasses the rotor. Furthermore, the stator is provided in a rotationally fixed manner with respect to a motor suspension of the fan motor. According to a further embodiment, the radial fan is designed as a double-flow radial fan. This includes opposing axial air inlets and a tangential air outlet. The fan wheel conveys the air from the air inlets to the air outlet and applies a pressure difference to it.

Weitere vorteilhafte Ausgestaltungen und Aspekte der Erfindung sind Gegenstand der Unteransprüche sowie der im Folgenden beschriebenen Ausführungsbeispiele der Erfindung. Im Weiteren wird die Erfindung anhand von bevorzugten Ausführungsformen unter Bezugnahme auf die beigelegten Figuren näher erläutert.Further advantageous configurations and aspects of the invention are the subject matter of the subclaims and the exemplary embodiments of the invention described below. In the following, the invention is explained in more detail on the basis of preferred embodiments with reference to the attached figures.

Es zeigen dabei:

  • Fig. 1: ausschnittsweise eine Dunstabzugshaube gemäß einer Ausführungsform; und
  • Fig. 2: einen Schnitt L-L aus Fig. 1; und
  • Fig.3: eine vergrößerte Ansicht M aus Fig. 2.
It shows:
  • Fig. 1 : a section of an extractor hood according to an embodiment; and
  • Fig. 2 : a section LL from Fig. 1 ; and
  • Fig. 3 : an enlarged view M from Fig. 2 .

In den Figuren sind gleiche oder funktionsgleiche Elemente mit denselben Bezugszeichen versehen worden, sofern nichts anderes angegeben ist.In the figures, elements that are the same or have the same function have been provided with the same reference symbols, unless otherwise stated.

Figur 1 zeigt ausschnittsweise eine Dunstabzugshaube 1 mit einem doppelflutigen Radialgebläse 2, und Fig. 2 zeigt einen Schnitt L-L aus Fig. 1. Figure 1 shows a detail of an extractor hood 1 with a double-flow radial fan 2, and Fig. 2 shows a section from LL Fig. 1 .

Das Radialgebläse 2 umfasst ein spiralförmiges Gehäuse 3, welches sich aus zwei miteinander verbundenen Gehäusehälften 4, 5 zusammensetzt. Eine jeweilige Gehäusehälfte 4, 5 weist einen axialen Lufteinlass 6, 9. "Axial" und "radial" bezieht sich vorliegend auf eine Drehachse 8 eines im Inneren des Gehäuses 3 angeordneten Gebläsemotor 7, welcher ein Lüfterrad 11 antreibt.The radial fan 2 comprises a spiral housing 3 which is composed of two housing halves 4, 5 connected to one another. A respective housing half 4, 5 has an axial air inlet 6, 9. "Axial" and "radial" in the present case refer to an axis of rotation 8 of a fan motor 7 which is arranged in the interior of the housing 3 and which drives a fan wheel 11.

Eine in Figur 2 gezeigte Verbindungsanordnung 10 verbindet den Gebläsemotor 7 mit dem Lüfterrad 11 für ein Antreiben desselben im Betrieb des Radialgebläses 2.One in Figure 2 The connection arrangement 10 shown connects the fan motor 7 to the fan wheel 11 for driving the same when the radial fan 2 is in operation.

Der Gebläsemotor 7 ist mittels einer Motoraufhängung 12, insbesondere mittels seines Lagerschilds, an der Gehäusehälfte 5 gehaltert, und zwar derart, dass er im Inneren des Lüfterrads 11 angeordnet ist.The fan motor 7 is held on the housing half 5 by means of a motor suspension 12, in particular by means of its end shield, in such a way that it is arranged in the interior of the fan wheel 11.

Der Gebläsemotor 7 umfasst einen bezüglich der Motoraufhängung 12 ortsfesten Stator 14 und einen als Innenläufer ausgebildeten Rotor 15. Der Rotor 15 umfasst eine Welle 18 mit der Drehachse 8.The fan motor 7 comprises a stator 14 which is stationary with respect to the motor suspension 12 and a rotor 15 designed as an internal rotor. The rotor 15 comprises a shaft 18 with the axis of rotation 8.

Das Lüfterrad 11 umfasst Schaufeln 13, welche sich axial erstrecken. Das Lüfterrad 11 umfasst ferner eine Glocke 16, welche die Schaufeln 13 miteinander und mit einer Buchse 17 verbindet, wie nachfolgend noch näher anhand von Figur 3 erläutert. Die Glocke 16 kann die Schaufeln 13 axial derart unterteilen, dass zwei separate Bereiche entstehen, welche jeweils einem Luftauslass 6 zugeordnet sind, von dem aus die Luft zu einem tangentialen Luftauslass 21 in dem Gehäuse 3 gefördert wird, wie in Fig. 2 zu erkennen.The fan wheel 11 includes blades 13 which extend axially. The fan wheel 11 further comprises a bell 16 which connects the blades 13 to one another and to a bushing 17, as will be explained in more detail below with reference to FIG Figure 3 explained. The bell 16 can subdivide the blades 13 axially in such a way that two separate areas are created which are each assigned to an air outlet 6 from which the air is conveyed to a tangential air outlet 21 in the housing 3, as in FIG Fig. 2 to recognize.

Wie weiter in Figur 2 zu erkennen, ist die Welle 18 des Rotors 15 freitragend ausgebildet, das heißt zwei Kugellager 19 tragen die Welle 18 zu einer Seite des Lüfterrads 11 bzw. der Glocke 16, und die Welle 18 trägt das Lüfterrad 11 an seinem freien Ende.As further in Figure 2 As can be seen, the shaft 18 of the rotor 15 is cantilevered, that is, two ball bearings 19 carry the shaft 18 to one side of the fan 11 or the bell 16, and the shaft 18 carries the fan 11 at its free end.

Figur 3 zeigt eine vergrößerte Ansicht M aus Figur 2. Figure 3 shows an enlarged view M from FIG Figure 2 .

Wie in Figur 2 gezeigt, umfasst die Welle 18 an ihrem äußersten Ende eine Montagehilfe 22 in Form eines Wellenstumpfs, welcher einen kleineren Durchmesser 20 aufweist als ein sich an den Wellenstumpf 22 anschließendes Gewinde 23 der Welle 18. Das Gewinde 23 ist gefolgt von einer Ringnut 24. An die Ringnut 24 schließt sich eine Schulter 25 an, welche einen radialen Abschnitt 26 und einen axialen Abschnitt 27 umfasst.As in Figure 2 shown, the shaft 18 comprises at its outermost end an assembly aid 22 in the form of a stub shaft which has a smaller diameter 20 than a thread 23 of the shaft 18 adjoining the stub shaft 22. The thread 23 is followed by an annular groove 24 Annular groove 24 is adjoined by a shoulder 25, which comprises a radial section 26 and an axial section 27.

Die Buchse 17 ist über eine Rastverbindung 31 formschlüssig in Drehrichtung und in axialer Richtung mit der Glocke 16 verbunden. Die Buchse 17 ist in Form eines Zylinders mit einer kreisringförmigen Grundfläche 32 ausgebildet. In den Zylinder bzw. die Buchse 17 ist eine mit der Schulter 25 korrespondierende Schulter 33 eingeformt. Die korrespondierende Schulter 33 setzt sich aus einem radialen Abschnitt 34 und einem axialen Abschnitt 35 zusammen. Die Buchse 17 ist ferner mit einer Einführschräge 36 zur Schulter 33 hin gebildet. Die Buchse 17 umfasst weiterhin ein mit dem Gewinde 23 korrespondierendes Gewinde 37, welches sich an die Schulter 33 anschließt.The socket 17 is positively connected in the direction of rotation and in the axial direction to the bell 16 via a latching connection 31. The bush 17 is designed in the form of a cylinder with a circular base surface 32. A shoulder 33 corresponding to shoulder 25 is molded into cylinder or bush 17. The corresponding shoulder 33 is composed of a radial section 34 and an axial section 35. The socket 17 is also formed with an insertion bevel 36 towards the shoulder 33. The socket 17 further comprises a thread 37 which corresponds to the thread 23 and adjoins the shoulder 33.

Bei der Montage des Lüfterrads 11 auf der Welle 18 wird zunächst der Kegelstumpf 22 von einer Seite in das Gewinde 37 eingeführt. Dadurch, dass der Kegelstumpf 22 einen vergleichsweise kleinen Durchmesser 20 aufweist, gelingt dies ohne Probleme. Die Einführschräge 36 hilft, dass die Schulter 25 in die korrespondierende Schulter 33 schlüpft. Hiernach gelangt durch Drehen des Lüfterrads 11 entgegen seiner Drehrichtung im Betrieb des Radialgebläses 2 das Gewinde 37 der Buchse 17 in Eingriff mit dem Gewinde 23 und wird auf dieses aufgeschraubt. Ab einem gewissen Zeitpunkt kommen dann die radialen Abschnitte 26, 34 der Schultern 25, 33 in Anlage miteinander. Ein weiteres Festziehen sorgt für einen Reibschluss zwischen den radialen Abschnitten 26, 34. Außerdem wird so eine definierte Position des Lüfterrads 11 in axialer Richtung bezüglich der Welle 18 erreicht. Ferner ist die Schulter 25 mit einem Zentrierdurchmesser gebildet, so dass das gegeneinander Anliegen der axialen Abschnitte 27, 35 der Schultern 25, 33 für eine Zentrierung des Lüfterrads 11 bezüglich der Drehachse 8 der Welle 18 sorgt.When mounting the fan wheel 11 on the shaft 18, the truncated cone 22 is first inserted into the thread 37 from one side. Because the truncated cone 22 has a comparatively small diameter 20, this succeeds without problems. The insertion bevel 36 helps that the shoulder 25 slips into the corresponding shoulder 33. Thereafter, by turning the fan wheel 11 against its direction of rotation, when the radial fan 2 is in operation, the thread 37 of the socket 17 engages with the thread 23 and is screwed onto it. From a certain point in time, the radial sections 26, 34 of the shoulders 25, 33 come into contact with one another. A further tightening ensures a frictional connection between the radial sections 26, 34. In addition, a defined position of the fan wheel 11 in the axial direction with respect to the shaft 18 is achieved in this way. Furthermore, the shoulder 25 is formed with a centering diameter, so that the contact between the axial sections 27, 35 of the shoulders 25, 33 ensures a centering of the fan wheel 11 with respect to the axis of rotation 8 of the shaft 18.

Verwendete Bezugszeichen:Reference symbols used:

11
DunstabzugshaubeExtractor hood
22
RadialgebläseCentrifugal fan
33
Gehäusecasing
44th
GehäusehälfteHousing half
55
GehäusehälfteHousing half
66th
LufteinlassAir inlet
77th
GebläsemotorBlower motor
88th
DrehachseAxis of rotation
99
LufteinlassAir inlet
1010
VerbindungsanordnungConnection arrangement
1111
LüfterradFan wheel
1212
MotoraufhängungEngine suspension
1313
Schaufelshovel
1414th
Statorstator
1515th
Rotorrotor
1616
GlockeBell jar
1717th
BuchseRifle
1818th
Wellewave
1919th
Kugellagerball-bearing
2020th
Durchmesserdiameter
2121st
LuftauslassAir outlet
2222nd
MontagehilfeAssembly aid
2323
Gewindethread
2424
RingnutRing groove
2525th
Schultershoulder
2626th
radialer Abschnittradial section
2727
axialer Abschnittaxial section
3131
RastverbindungLocking connection
3232
GrundflächeFloor space
3333
Schultershoulder
3434
radialer Abschnittradial section
3535
axialer Abschnittaxial section
3636
EinführschrägeLead-in bevel
3737
Gewindethread

Claims (14)

  1. Extractor hood (1) comprising a radial fan (2) with a fan wheel (11) and a fan motor (7), which comprises a shaft (18) for driving the fan wheel (11), wherein the shaft (18) has a thread (23), which is screwed into a corresponding thread (37) of the fan wheel (11), and a shoulder (25) following the thread (23), wherein the shoulder (25) engages into a corresponding shoulder (33) of the fan wheel (11), wherein radial sections (26, 34) of the shoulder (25) and the corresponding shoulder (33) are in axial contact with one another, and wherein the shaft (18) and the fan wheel (11) are connected in rotationally fixed manner.
  2. Extractor hood according to claim 1, characterised in that axial sections (27, 35) of the shoulder (25) and the corresponding shoulder (33) are in radial contact with one another.
  3. Extractor hood according to claim 1 or 2, characterised in that the fan wheel (11) has a bushing (17), which comprises the corresponding thread (37) and the corresponding shoulder (33).
  4. Extractor hood according to claim 3, characterised in that the bushing (17) is formed from a different material than a cover (16) of the fan wheel (11) which accommodates the bushing (17).
  5. Extractor hood according to claim 4, characterised in that the bushing (17) is connected to the cover (16) with a positive, non-positive and/or material fit.
  6. Extractor hood according to claim 5, characterised in that a latch connection (31) is provided between the bushing (17) and the cover (16).
  7. Extractor hood according to one of claims 1-6, characterised in that the corresponding shoulder (33) has a centring diameter which centres the fan wheel (11) in relation to an axis of rotation (8) of the shaft (18).
  8. Extractor hood according to one of claims 1-7, characterised in that the corresponding shoulder (33) of the fan wheel (11) has an insertion chamfer (36) for inserting the shoulder (25) of the shaft (18) into the corresponding shoulder (33).
  9. Extractor hood according to one of claims 1-8, characterised in that the shaft (18) has an annular groove (24) between the thread (23) and the shoulder (25).
  10. Extractor hood according to one of claims 1 - 9, characterised in that the shaft (18), at its one end, has an assembly aid (22) for the screwing-in of the thread (23) of the shaft (18) into the corresponding thread (37) of the fan wheel (11).
  11. Extractor hood according to claim 10, characterised in that the assembly aid (22) is embodied in the form of a shaft section, which has a smaller diameter (20) than the corresponding thread (37) of the fan wheel (11).
  12. Extractor hood according to one of claims 1 - 11, characterised in that the shaft (18) is part of a rotor (15) of the fan motor (7).
  13. Extractor hood according to claim 12, characterised in that the rotor (15) is embodied as an internal rotor.
  14. Extractor hood according to one of claims 1 - 13, characterised in that the radial fan (2) is embodied as a double inlet radial fan.
EP14157261.0A 2013-03-11 2014-02-28 Mounting arrangement for a radial fan for a suction hood Active EP2778428B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL14157261T PL2778428T3 (en) 2013-03-11 2014-02-28 Mounting arrangement for a radial fan for a suction hood

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013204140.3A DE102013204140A1 (en) 2013-03-11 2013-03-11 Connecting arrangement for a radial fan of an extractor hood

Publications (3)

Publication Number Publication Date
EP2778428A2 EP2778428A2 (en) 2014-09-17
EP2778428A3 EP2778428A3 (en) 2018-04-04
EP2778428B1 true EP2778428B1 (en) 2020-08-26

Family

ID=50189567

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14157261.0A Active EP2778428B1 (en) 2013-03-11 2014-02-28 Mounting arrangement for a radial fan for a suction hood

Country Status (4)

Country Link
EP (1) EP2778428B1 (en)
CN (1) CN104047887A (en)
DE (1) DE102013204140A1 (en)
PL (1) PL2778428T3 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015108489B3 (en) * 2015-05-29 2016-09-29 Halla Visteon Climate Control Corporation Centrifugal blower unit, in particular for motor vehicle air conditioners
ITUA20162385A1 (en) * 2016-04-07 2017-10-07 Faber Spa FAN PERFECTED FOR FUMES AND VAPORS ASPIRATION SYSTEM, IN PARTICULAR FOR THE KITCHEN AND THE SUCTION SYSTEM WITH THIS FAN
CN106813282B (en) * 2017-04-10 2023-03-28 华帝股份有限公司 Automatic cleaning device of range hood and oil smoke cleaning method thereof
CN115788944B (en) * 2023-01-16 2023-04-18 中国电建集团透平科技有限公司 Large-scale wind-tunnel fan drive shafting structure

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2269799A (en) * 1939-09-23 1942-01-13 Torrington Mfg Co Fan hub and shaft assembly
CN2136952Y (en) * 1992-07-28 1993-06-23 蔡琼瑶 Range hood f

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GB983101A (en) * 1961-03-13 1965-02-10 Firth Cleveland Ltd Improvements relating to cross-flow fans
JPS5136602A (en) * 1974-09-24 1976-03-27 Hitachi Ltd GOSEIJUSHISEIHANEGURUMA
FR2324203A7 (en) * 1975-09-15 1977-04-08 Sisme Italiana Statori Motori Connection between electric motor and pump - has rotor screwed onto motor spindle and pump housing bolted to motor shroud
JPS5289703U (en) * 1975-12-27 1977-07-05
US4832573A (en) * 1987-11-27 1989-05-23 General Motors Corporation Integral connection for plastic water pump impeller
DE9016767U1 (en) 1990-12-12 1991-02-28 Ebm Elektrobau Mulfingen Gmbh & Co, 7119 Mulfingen Extractor hood
DE19640647A1 (en) * 1996-10-02 1998-04-09 Asea Brown Boveri Compressor wheel arrangement for turbochargers
AU3352599A (en) * 1999-03-23 2000-10-09 Turk Elektrik Endustrisi A.S. Insulated fan
JP2010242526A (en) * 2009-04-01 2010-10-28 Tokai Rubber Ind Ltd Fan boss

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2269799A (en) * 1939-09-23 1942-01-13 Torrington Mfg Co Fan hub and shaft assembly
CN2136952Y (en) * 1992-07-28 1993-06-23 蔡琼瑶 Range hood f

Also Published As

Publication number Publication date
EP2778428A3 (en) 2018-04-04
EP2778428A2 (en) 2014-09-17
CN104047887A (en) 2014-09-17
DE102013204140A1 (en) 2014-09-11
PL2778428T3 (en) 2021-04-06

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