EP2778428A2 - 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
EP2778428A2
EP2778428A2 EP14157261.0A EP14157261A EP2778428A2 EP 2778428 A2 EP2778428 A2 EP 2778428A2 EP 14157261 A EP14157261 A EP 14157261A EP 2778428 A2 EP2778428 A2 EP 2778428A2
Authority
EP
European Patent Office
Prior art keywords
fan
shaft
shoulder
fan wheel
thread
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP14157261.0A
Other languages
German (de)
French (fr)
Other versions
EP2778428B1 (en
EP2778428A3 (en
Inventor
Robert Blaz
Ilhan GÜCLÜ
Eugen Maurer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Priority to PL14157261T priority Critical patent/PL2778428T3/en
Publication of EP2778428A2 publication Critical patent/EP2778428A2/en
Publication of EP2778428A3 publication Critical patent/EP2778428A3/en
Application granted granted Critical
Publication of EP2778428B1 publication Critical patent/EP2778428B1/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/02Selection of particular materials
    • F04D29/023Selection of particular materials especially adapted for elastic fluid pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/26Rotors specially for elastic fluids
    • F04D29/263Rotors specially for elastic fluids mounting fan or blower rotors on shafts
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/26Rotors specially for elastic fluids
    • F04D29/28Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • F04D29/282Rotors 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 a connection arrangement for a radial fan of an extractor hood.
  • the radial fan comprises a fan wheel and a fan motor, which drives the fan wheel during operation of the radial fan.
  • the fan motor is disposed inside the fan and drives the fan via a Ronde, which is connected to the rotor of the fan motor.
  • An 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 a cost-effective and compact design.
  • connection arrangement for a radial fan of an extractor hood with a fan and a shaft is proposed.
  • the shaft is designed to drive the fan wheel.
  • the shaft has a thread and a subsequent to the thread shoulder.
  • the thread is screwed into a corresponding thread of the fan.
  • the shoulder engages in a corresponding shoulder of the fan. Radial portions of the shoulder and the corresponding shoulder axially abut each other.
  • the shaft can be provided with a smaller maximum diameter.
  • the reason for this is to be seen in that a centering of the fan with respect to the axis of rotation of the shaft can also take place by means of the shoulders and no separate centering between the thread and the shoulder of the shaft is needed.
  • the smaller maximum shaft diameter allows the use of smaller bearings, in particular ball bearings, for supporting the shaft or the rotor. As a result, the corresponding fan motor builds smaller, and it can save costs.
  • the radial blower may in particular be a double-flow radial blower.
  • the fan may be composed of axially disposed blades which are held together at their respective ends by two concentric rings. Furthermore, the fan may have a bell, which rotatably connects the blades with the shaft or a socket.
  • the shoulder and the corresponding shoulder are preferably each rotationally symmetrical with respect to the axis of rotation.
  • the radial sections are preferably directly against each other, that is, no other component or no air gap is arranged between them.
  • Ring refers to the axis of rotation of the shaft.
  • radial and axial also includes deviations from the radial or axial by up to 5 °.
  • the radial sections come into contact with each other when the corresponding thread of the fan is completely screwed onto the thread of the shaft. By further rotation, the radial portions are then frictionally clamped against each other, so that an automatic release of the fan wheel is prevented by the shaft.
  • the direction of rotation for screwing the fan wheel on the shaft can be provided opposite to the direction of rotation of the fan during operation of the radial fan. This ensures that the connection between fan and shaft continues to tighten during operation of the radial fan and does not dissolve.
  • the axial portions of the shoulder and the corresponding shoulder radially bear against one another.
  • a centering of the fan with respect to the axis of rotation of the shaft can be accomplished by means of the shoulders.
  • an additional support of the fan on the shaft is created.
  • the fan wheel on a socket which comprises the corresponding thread and the corresponding shoulder. At the junction between fan and shaft high forces can occur, so that it may be beneficial to initiate these by means of a socket in the fan.
  • the bushing is formed of a different material than a bell receiving the bushing of the fan wheel.
  • the socket may for example be formed of a more stable material than the bell so as to be able to transmit the forces from the shaft to the fan.
  • the socket is positively, positively and / or materially connected to the bell.
  • the sleeve may be frictionally held in an opening of the bell.
  • the bush can be encapsulated with the material of the bell, for example in a plastic injection molding process, whereby a cohesive connection between the bell and the socket is made.
  • a latching connection between the socket and the bell is provided.
  • one or more receiving elements can be arranged on a lateral surface of the bush, which are elastically positively connected with one or more engagement elements of the bell.
  • the bush can be designed in the form of a cylinder with an annular base.
  • 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 has a double function: On the one hand, it ensures a frictional connection and thus for a mounting of the fan wheel on the shaft. On the other hand, it centers the fan wheel with respect to a rotation axis of the shaft. This results in a compact design.
  • the corresponding shoulder of the fan wheel has an insertion bevel for insertion of the shoulder of the shaft into the corresponding shoulder. This results in a simple installation.
  • the shaft between the thread and the shoulder has an annular groove. This allows the shoulder to be easily made.
  • the shaft has at its one end an assembly aid for screwing the thread of the shaft into the corresponding thread of the fan wheel. This simplifies assembly of the connection arrangement.
  • the mounting aid is formed in the form of a shaft section which has a smaller diameter than the thread.
  • an extractor hood is provided with a radial fan.
  • the radial fan has a fan and a fan motor. Furthermore, the radial fan comprises the connection arrangement described above, which rotatably connects a shaft of the fan motor with the fan.
  • the shaft is part of a rotor of the fan motor.
  • the shaft can be mounted in two spaced-apart bearings, in particular ball bearings, to one side of the fan.
  • the rotor is designed as an internal rotor. Accordingly, the stator is provided so as to include the rotor. Further, the stator is rotatably provided 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 as well as a tangential air outlet. The fan delivers the air from the air inlets to the air outlet and pressurizes it with a pressure difference.
  • FIG. 1 shows a detail of an extractor hood 1 with a double-flow radial fan 2
  • Fig. 2 shows a section LL Fig. 1 ,
  • the radial fan 2 comprises a spiral-shaped housing 3, which is composed of two mutually connected housing halves 4, 5.
  • a respective housing half 4, 5 has an axial air inlet 6, 9.
  • "Axial” and “radial” refers in the present case to an axis of rotation 8 of a fan motor 7 arranged inside the housing 3, which drives a fan wheel 11.
  • connection assembly 10 connects the fan motor 7 with the fan 11 for driving the same during operation of the radial fan second
  • the fan motor 7 is held by means of a motor mount 12, in particular by means of its bearing plate, on the housing half 5, in such a way that it is arranged in the interior of the fan 11.
  • the fan motor 7 comprises a stator 14 fixed relative to the motor suspension 12 and a rotor 15 formed as an internal rotor.
  • the rotor 15 comprises a shaft 18 with the axis of rotation 8.
  • the fan 11 includes blades 13 which extend axially.
  • the fan 11 further includes a bell 16, which connects the blades 13 with each other and with a socket 17, as will be described in more detail below with reference to FIG FIG. 3 explained.
  • the bell 16 may divide the blades 13 axially such that there are two separate regions each associated with 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 and the bell 16, and the shaft 18 carries the fan 11 at its free end.
  • FIG. 3 shows an enlarged view M from FIG. 2 .
  • the shaft 18 comprises at its extreme end an assembly aid 22 in the form of a stub shaft, which has a smaller diameter 20 than a subsequent to the stub shaft 22 thread 23 of the shaft 18.
  • the thread 23 is followed by an annular groove 24.
  • a shoulder 25 which comprises a radial portion 26 and an axial portion 27.
  • the bushing 17 is positively connected via a latching connection 31 in the direction of rotation and in the axial direction with the bell 16.
  • the bush 17 is in the form of a cylinder with an annular base 32.
  • a shoulder 33 corresponding to the shoulder 33 is formed in the cylinder or the bushing 17.
  • the corresponding shoulder 33 is composed of a radial section 34 and an axial section 35.
  • the bush 17 is further formed with an insertion bevel 36 to the shoulder 33 out.
  • the bush 17 further comprises a thread 37 corresponding to the thread 37, which 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 from one side into the thread 37. The fact that the truncated cone 22 has a comparatively small diameter 20, this succeeds without problems.
  • the insertion bevel 36 helps the shoulder 25 to slip into the corresponding shoulder 33. Thereafter, by turning the fan 11 against its direction of rotation during operation of the radial fan 2, the thread 37 of the bushing 17 engages with the thread 23 and is screwed onto this. At a certain point in time, the radial sections 26, 34 of the shoulders 25, 33 come into contact with each other. 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 thus achieved. Furthermore, the shoulder 25 is formed with a centering diameter, so that the abutment of the axial sections 27, 35 of the shoulders 25, 33 ensures centering of the fan wheel 11 with respect to the axis of rotation 8

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

Abstract

The connection assembly has a fan wheel and a shaft (18) for driving the fan wheel. The shaft has a screw thread which is screwed into the corresponding screw thread of the fan wheel. A shoulder subsequent to the screw thread of shaft is engaged in a corresponding shoulder of the fan wheel. The radial portions of the shoulder and the corresponding shoulder of fan wheel are in axial engagement with each other. An independent claim is included for vapor fume hood.

Description

Die vorliegende Erfindung betrifft eine Verbindungsanordnung für ein Radialgebläse einer Dunstabzugshaube.The present invention relates to a connection arrangement for a radial fan of an 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, is from the DE 90 16 767 U1 a radial fan for a cooker hood known. The radial fan comprises a fan wheel and a fan motor, which drives the fan wheel during operation of the radial fan. The fan motor is disposed inside the fan and drives the fan via a Ronde, which is connected to the rotor of the fan motor.

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.An 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 a cost-effective and compact design.

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.Accordingly, a connection arrangement for a radial fan of an extractor hood with a fan and a shaft is proposed. The shaft is designed to drive the fan wheel. The shaft has a thread and a subsequent to the thread shoulder. The thread is screwed into a corresponding thread of the fan. The shoulder engages in a corresponding shoulder of the fan. Radial portions of the shoulder and the corresponding shoulder axially abut each other.

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.The fact that the shoulder of the shaft is not arranged outside of the fan, but moved into this, the shaft can be provided with a smaller maximum diameter. The reason for this is to be seen in that a centering of the fan with respect to the axis of rotation of the shaft can also take place by means of the shoulders and no separate centering between the thread and the shoulder of the shaft is needed. The smaller maximum shaft diameter allows the use of smaller bearings, in particular ball bearings, for supporting the shaft or the rotor. As a result, the corresponding fan motor builds smaller, and it can save costs.

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

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 may be composed of axially disposed blades which are held together at their respective ends by two concentric rings. Furthermore, the fan may have a bell, which rotatably connects the blades with the shaft or a socket.

Die Schulter und die korrespondierende Schulter sind bevorzugt jeweils rotationssymmetrisch bezüglich der Drehachse ausgebildet.The shoulder and the corresponding shoulder are preferably each 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 directly against each other, 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 "circumferentially" herein refers to the axis of rotation of the shaft. Preferably, "radial" and "axial" also includes deviations from the radial or axial by up to 5 °. The radial sections come into contact with each other when the corresponding thread of the fan is completely screwed onto the thread of the shaft. By further rotation, the radial portions are then frictionally clamped against each other, so that an automatic release of the fan wheel is prevented by the shaft. The direction of rotation for screwing the fan wheel on the shaft can be provided opposite to the direction of rotation of the fan during operation of the radial fan. This ensures that the connection between fan and shaft continues to tighten during operation of the radial fan and does not dissolve.

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 portions of the shoulder and the corresponding shoulder radially bear against one another. Thereby, a centering of the fan with respect to the axis of rotation of the shaft can be accomplished by means of the shoulders. In addition, an additional support of the fan on the shaft is created.

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 on a socket which comprises the corresponding thread and the corresponding shoulder. At the junction between fan and shaft high forces can occur, so that it may be beneficial to initiate these by means of a socket in the fan.

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 of a different material than a bell receiving the bushing of the fan wheel. Thus, the socket may for example be formed of a more stable material than the bell so as to be able to transmit the forces from the shaft to the fan.

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, positively and / or materially connected to the bell. For example, the sleeve may be frictionally held in an opening of the bell. Furthermore, the bush can be encapsulated with the material of the bell, for example in a plastic injection molding process, whereby a cohesive connection between the bell and the socket is made.

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 between the socket and the bell is provided. For example, one or more receiving elements can be arranged on a lateral surface of the bush, which are elastically positively connected with one or more engagement elements of the bell.

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

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. Thus, the corresponding shoulder has a double function: On the one hand, it ensures a frictional connection and thus for a mounting of the fan wheel on the shaft. On the other hand, it centers the fan wheel with respect to a rotation axis of the shaft. This results in a compact design.

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 insertion of the shoulder of the shaft into the corresponding shoulder. This results in a simple installation.

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 between the thread and the shoulder has an annular groove. This allows the shoulder to be easily made.

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 at its one end an assembly aid 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 mounting aid is formed in the form of a shaft section which has a smaller diameter than the thread. As a result, an assembly aid can be provided in a simple manner.

Weiterhin 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.Furthermore, an extractor hood is provided with a radial fan. The radial fan has a fan and a fan motor. Furthermore, the radial fan comprises the connection arrangement described above, which rotatably connects a shaft of the fan motor with the fan.

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 mounted in two spaced-apart bearings, in particular ball bearings, to one side of the fan.

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.According to a further embodiment, the rotor is designed as an internal rotor. Accordingly, the stator is provided so as to include the rotor. Further, the stator is rotatably provided with respect to a motor suspension of the fan motor.

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 radial fan is designed as a double-flow radial fan. This includes opposing axial air inlets as well as a tangential air outlet. The fan delivers the air from the air inlets to the air outlet and pressurizes it with a pressure difference.

Weitere mögliche Implementierungen der Erfindung umfassen auch nicht explizit genannte Kombinationen von zuvor oder im Folgenden bezüglich der Ausführungsbeispiele beschriebenen Merkmale oder Ausführungsformen der Verbindungsanordnung oder der Dunstabzugshaube. Dabei wird der Fachmann auch Einzelaspekte als Verbesserungen oder Ergänzungen zu der jeweiligen Grundform der Erfindung hinzufügen oder abändern.Further possible implementations of the invention also include not explicitly mentioned combinations of features or embodiments of the connection arrangement described above or below with respect to the embodiments Hood. The skilled person will also add or modify individual aspects as improvements or additions to the respective basic form of the invention.

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 embodiments and aspects of the invention are the subject of the dependent claims and the embodiments of the invention described below. Furthermore, the invention will be explained in more detail by means 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 detail of an extractor hood according to an embodiment; and
  • Fig. 2 : a cut LL off Fig. 1 ; and
  • Figure 3 : an enlarged view M off Fig. 2 ,

In den Figuren sind gleiche oder funktionsgleiche Elemente mit denselben Bezugszeichen versehen worden, sofern nichts anderes angegeben ist.In the figures, the same or functionally identical elements have been given the same reference numerals, unless stated otherwise.

Figur 1 zeigt ausschnittsweise eine Dunstabzugshaube 1 mit einem doppelflutigen Radialgebläse 2, und Fig. 2 zeigt einen Schnitt L-L aus Fig. 1. FIG. 1 shows a detail of an extractor hood 1 with a double-flow radial fan 2, and Fig. 2 shows a section 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-shaped housing 3, which is composed of two mutually connected housing halves 4, 5. A respective housing half 4, 5 has an axial air inlet 6, 9. "Axial" and "radial" refers in the present case to an axis of rotation 8 of a fan motor 7 arranged inside the housing 3, 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.An in FIG. 2 shown connection assembly 10 connects the fan motor 7 with the fan 11 for driving the same during operation of the radial fan second

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 by means of a motor mount 12, in particular by means of its bearing plate, on the housing half 5, in such a way that it is arranged in the interior of the fan 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 fixed relative to the motor suspension 12 and a rotor 15 formed 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 11 includes blades 13 which extend axially. The fan 11 further includes a bell 16, which connects the blades 13 with each other and with a socket 17, as will be described in more detail below with reference to FIG FIG. 3 explained. The bell 16 may divide the blades 13 axially such that there are two separate regions each associated with 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 in further 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 and 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. FIG. 3 shows an enlarged view M from FIG. 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 FIG. 2 shown, the shaft 18 comprises at its extreme end an assembly aid 22 in the form of a stub shaft, which has a smaller diameter 20 than a subsequent to the stub shaft 22 thread 23 of the shaft 18. The thread 23 is followed by an annular groove 24. To the Annular groove 24 is followed by a shoulder 25, which comprises a radial portion 26 and an axial portion 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 bushing 17 is positively connected via a latching connection 31 in the direction of rotation and in the axial direction with the bell 16. The bush 17 is in the form of a cylinder with an annular base 32. In the cylinder or the bushing 17, a shoulder 33 corresponding to the shoulder 33 is formed. The corresponding shoulder 33 is composed of a radial section 34 and an axial section 35. The bush 17 is further formed with an insertion bevel 36 to the shoulder 33 out. The bush 17 further comprises a thread 37 corresponding to the thread 37, which 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 from one side into the thread 37. The fact that the truncated cone 22 has a comparatively small diameter 20, this succeeds without problems. The insertion bevel 36 helps the shoulder 25 to slip into the corresponding shoulder 33. Thereafter, by turning the fan 11 against its direction of rotation during operation of the radial fan 2, the thread 37 of the bushing 17 engages with the thread 23 and is screwed onto this. At a certain point in time, the radial sections 26, 34 of the shoulders 25, 33 come into contact with each other. 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 thus achieved. Furthermore, the shoulder 25 is formed with a centering diameter, so that the abutment of the axial sections 27, 35 of the shoulders 25, 33 ensures centering of the fan wheel 11 with respect to the axis of rotation 8 of the shaft 18.

Obwohl die Erfindung vorliegend anhand bevorzugter Ausführungsbeispiele beschrieben wurde, ist sie hierauf nicht beschränkt, sondern vielfältig modifizierbar.Although the invention has been described herein with reference to preferred embodiments, it is not limited thereto, but variously modifiable.

Verwendete Bezugszeichen:Used reference signs:

11
DunstabzugshaubeHood
22
Radialgebläsecentrifugal blower
33
Gehäusecasing
44
Gehäusehälftehousing half
55
Gehäusehälftehousing half
66
Lufteinlassair intake
77
Gebläsemotorblower motor
88th
Drehachseaxis of rotation
99
Lufteinlassair intake
1010
Verbindungsanordnungjoint assembly
1111
Lüfterradfan
1212
Motoraufhängungengine Mounts
1313
Schaufelshovel
1414
Statorstator
1515
Rotorrotor
1616
GlockeBell jar
1717
BuchseRifle
1818
Wellewave
1919
Kugellagerball-bearing
2020
Durchmesserdiameter
2121
Luftauslassair outlet
2222
Montagehilfemounting aid
2323
Gewindethread
2424
Ringnutring groove
2525
Schultershoulder
2626
radialer Abschnittradial section
2727
axialer Abschnittaxial section
3131
Rastverbindunglocking connection
3232
GrundflächeFloor space
3333
Schultershoulder
3434
radialer Abschnittradial section
3535
axialer Abschnittaxial section
3636
Einführschrägechamfer
3737
Gewindethread

Claims (15)

Verbindungsanordnung (10) für ein Radialgebläse (2) einer Dunstabzugshaube (1), mit einem Lüfterrad (11) und einer Welle (18) zum Antreiben des Lüfterrads (11), welche ein Gewinde (23), das in ein korrespondierendes Gewinde (37) des Lüfterrads (11) eingeschraubt ist, und eine sich an das Gewinde (23) anschließende Schulter (25) aufweist, die in eine korrespondierende Schulter (33) des Lüfterrads (11) eingreift, wobei radiale Abschnitte (26, 34) der Schulter (25) und der korrespondierenden Schulter (33) axial in Anlage miteinander stehen.Connection arrangement (10) for a radial fan (2) of an extractor hood (1), with a fan wheel (11) and a shaft (18) for driving the fan wheel (11), which has a thread (23) which is inserted into a corresponding thread (37 ) of the fan wheel (11), and having a thread (23) adjoining the shoulder (25) which engages in a corresponding shoulder (33) of the fan wheel (11), wherein radial portions (26, 34) of the shoulder (25) and the corresponding shoulder (33) axially in abutment with each other. Verbindungsanordnung nach Anspruch 1, dadurch gekennzeichnet, dass axiale Abschnitte (27, 35) der Schulter (25) und der korrespondierenden Schulter (33) radial in Anlage miteinander stehen.Connecting arrangement according to claim 1, characterized in that axial sections (27, 35) of the shoulder (25) and the corresponding shoulder (33) are in radial contact with each other. Verbindungsanordnung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Lüfterrad (11) eine Buchse (17) aufweist, welche das korrespondierende Gewinde (37) und die korrespondierende Schulter (33) umfasst.Connecting arrangement according to claim 1 or 2, characterized in that the fan wheel (11) has a bushing (17) which comprises the corresponding thread (37) and the corresponding shoulder (33). Verbindungsanordnung nach Anspruch 3, dadurch gekennzeichnet, dass die Buchse (17) aus einem anderen Material gebildet ist als eine die Buchse (17) aufnehmende Glocke (16) des Lüfterrads (11).Connecting arrangement according to claim 3, characterized in that the bush (17) is formed of a different material than a bush (17) receiving the bell (16) of the fan wheel (11). Verbindungsanordnung nach Anspruch 4, dadurch gekennzeichnet, dass die Buchse (17) form-, kraft- und/oder stoffschlüssig mit der Glocke (16) verbunden ist.Connecting arrangement according to claim 4, characterized in that the bush (17) is positively, positively and / or materially connected to the bell (16). Verbindungsanordnung nach Anspruch 5, dadurch gekennzeichnet, dass eine Rastverbindung (31) zwischen der Buchse (17) und der Glocke (16) vorgesehen ist.Connecting arrangement according to claim 5, characterized in that a latching connection (31) between the bushing (17) and the bell (16) is provided. Verbindungsanordnung nach einem der Ansprüche 1 - 6, dadurch gekennzeichnet, dass die korrespondierende Schulter (33) einen Zentrierdurchmesser aufweist, welcher das Lüfterrad (11) bezüglich einer Drehachse (8) der Welle (18) zentriert.Connecting arrangement according to one of claims 1-6, characterized in that the corresponding shoulder (33) has a centering diameter, which centers the fan wheel (11) with respect to an axis of rotation (8) of the shaft (18). Verbindungsanordnung nach einem der Ansprüche 1 - 7, dadurch gekennzeichnet, dass die korrespondierende Schulter (33) des Lüfterrads (11) eine Einführschräge (36) für ein Einführen der Schulter (25) der Welle (18) in die korrespondierende Schulter (33) aufweist.Connecting arrangement according to one of claims 1-7, characterized in that the corresponding shoulder (33) of the fan wheel (11) has an insertion bevel (36) for insertion of the shoulder (25) of the shaft (18) in the corresponding shoulder (33) , Verbindungsanordnung nach einem der Ansprüche 1 - 8, dadurch gekennzeichnet, dass die Welle (18) zwischen dem Gewinde (23) und der Schulter (25) eine Ringnut (24) aufweist.Connecting arrangement according to one of claims 1-8, characterized in that the shaft (18) between the thread (23) and the shoulder (25) has an annular groove (24). Verbindungsanordnung nach einem der Ansprüche 1 - 9, dadurch gekennzeichnet, dass die Welle (18) an ihrem einen Ende eine Montagehilfe (22) für das Einschrauben des Gewindes (23) der Welle (18) in das korrespondierende Gewinde (37) des Lüfterrads (11) aufweist.Connecting arrangement according to one of claims 1 - 9, characterized in that the shaft (18) at one end of a mounting aid (22) for screwing the thread (23) of the shaft (18) in the corresponding thread (37) of the fan ( 11). Verbindungsanordnung nach Anspruch 10, dadurch gekennzeichnet, dass die Montagehilfe (22) in Form eines Wellenabschnitts ausgebildet ist, welcher einen kleineren Durchmesser (20) als das korrespondierende Gewinde (37) des Lüfterrads (11) aufweist.Connecting arrangement according to claim 10, characterized in that the mounting aid (22) is designed in the form of a shaft portion which has a smaller diameter (20) than the corresponding thread (37) of the fan wheel (11). Dunstabzugshaube (1) mit einem Radialgebläse (2), welches ein Lüfterrad (11), einen Gebläsemotor (7) und eine Verbindungsanordnung (10) nach einem der Ansprüche 1 - 11 aufweist, wobei die Verbindungsanordnung (10) eine Welle (18) des Gebläsemotors (7) mit dem Lüfterrad (11) drehfest verbindet.An extractor hood (1) having a radial fan (2), which has a fan wheel (11), a fan motor (7) and a connection arrangement (10) according to any one of claims 1-11, wherein the connection arrangement (10) comprises a shaft (18) of the Blower motor (7) with the fan wheel (11) rotatably connects. Dunstabzugshaube nach Anspruch 12, dadurch gekennzeichnet, dass die Welle (18) Teil eines Rotors (15) des Gebläsemotors (7) ist.Extractor hood according to claim 12, characterized in that the shaft (18) is part of a rotor (15) of the fan motor (7). Dunstabzugshaube nach Anspruch 13, dadurch gekennzeichnet, dass der Rotor (15) als Innenläufer ausgebildet ist.Extractor hood according to claim 13, characterized in that the rotor (15) is designed as an internal rotor. Dunstabzugshaube nach einem der Ansprüche 12 - 14, dadurch gekennzeichnet, dass das Radialgebläse (2) als doppelflutiges Radialgebläse ausgebildet ist.Extractor hood according to one of claims 12-14, characterized in that the radial fan (2) is designed as a double-flow radial fan.
EP14157261.0A 2013-03-11 2014-02-28 Mounting arrangement for a radial fan for a suction hood Active EP2778428B1 (en)

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DE102013204140.3A DE102013204140A1 (en) 2013-03-11 2013-03-11 Connecting arrangement for a radial fan of an extractor hood

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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

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EP3228875A1 (en) * 2016-04-07 2017-10-11 Faber S.p.A. Imroved fan for smoke and vapour extraction system, in particular for kitchens and extraction system incorporating such a fan
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Also Published As

Publication number Publication date
DE102013204140A1 (en) 2014-09-11
EP2778428B1 (en) 2020-08-26
EP2778428A3 (en) 2018-04-04
CN104047887A (en) 2014-09-17
PL2778428T3 (en) 2021-04-06

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