EP2778428B1 - Verbindungsanordnung für ein Radialgebläse einer Dunstabzugshaube - Google Patents

Verbindungsanordnung für ein Radialgebläse einer Dunstabzugshaube 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
Authority
EP
European Patent Office
Prior art keywords
shaft
shoulder
fan
fan wheel
extractor hood
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.)
Active
Application number
EP14157261.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2778428A2 (de
EP2778428A3 (de
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 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 Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Priority to PL14157261T priority Critical patent/PL2778428T3/pl
Publication of EP2778428A2 publication Critical patent/EP2778428A2/de
Publication of EP2778428A3 publication Critical patent/EP2778428A3/de
Application granted granted Critical
Publication of EP2778428B1 publication Critical patent/EP2778428B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP14157261.0A 2013-03-11 2014-02-28 Verbindungsanordnung für ein Radialgebläse einer Dunstabzugshaube Active EP2778428B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL14157261T PL2778428T3 (pl) 2013-03-11 2014-02-28 Układ połączeniowy do wentylatora radialnego okapu kuchennego

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013204140.3A DE102013204140A1 (de) 2013-03-11 2013-03-11 Verbindungsanordnung für ein Radialgebläse einer Dunstabzugshaube

Publications (3)

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

Family

ID=50189567

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14157261.0A Active EP2778428B1 (de) 2013-03-11 2014-02-28 Verbindungsanordnung für ein Radialgebläse einer Dunstabzugshaube

Country Status (4)

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

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015108489B3 (de) * 2015-05-29 2016-09-29 Halla Visteon Climate Control Corporation Zentrifugalgebläseeinheit, insbesondere für Kraftfahrzeugklimaanlagen
ITUA20162385A1 (it) * 2016-04-07 2017-10-07 Faber Spa Ventilatore perfezionato per sistema di aspirazione di fumi e vapori, in particolare per cucina e sistema di aspirazione avente tale ventilatore
CN106813282B (zh) * 2017-04-10 2023-03-28 华帝股份有限公司 一种油烟机的自动清洗装置及其清洗油烟方法
CN115788944B (zh) * 2023-01-16 2023-04-18 中国电建集团透平科技有限公司 一种大型风洞风机驱动轴系结构

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 (zh) * 1992-07-28 1993-06-23 蔡琼瑶 一种新型排油烟机

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB983101A (en) * 1961-03-13 1965-02-10 Firth Cleveland Ltd Improvements relating to cross-flow fans
JPS5136602A (ja) * 1974-09-24 1976-03-27 Hitachi Ltd Goseijushiseihaneguruma
FR2324203A7 (fr) * 1975-09-15 1977-04-08 Sisme Italiana Statori Motori Pompe centrifuge a rotor pourvu d'un manchon d'accouplement au moteur
JPS5289703U (zh) * 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 (de) 1990-12-12 1991-02-28 Ebm Elektrobau Mulfingen Gmbh & Co, 7119 Mulfingen Dunstabzugshaube
DE19640647A1 (de) * 1996-10-02 1998-04-09 Asea Brown Boveri Verdichterradanordnung für Turbolader
TR200102654T2 (tr) * 1999-03-23 2001-12-21 Arçeli̇k A.Ş. izoleli fan
JP2010242526A (ja) * 2009-04-01 2010-10-28 Tokai Rubber Ind Ltd ファンボス

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 (zh) * 1992-07-28 1993-06-23 蔡琼瑶 一种新型排油烟机

Also Published As

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

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